10-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-K

Annual report pursuant to Section 13 or 15(d) of the

Securities Exchange Act of 1934 for the fiscal year ended December 31, 2022

Commission File Number 001-15811

MARKEL CORPORATION

(Exact name of registrant as specified in its charter)

A Virginia Corporation

IRS Employer Identification No. 54-1959284

4521 Highwoods Parkway, Glen Allen, Virginia 23060-6148

(Address of principal executive offices) (Zip code)

Registrant's telephone number, including area code: (804) 747-0136

Securities registered pursuant to Section 12(b) of the Act:

Title of each class	Trading Symbol(s)	Name of exchange on which registered
Common Stock, no par value	MKL	New York Stock Exchange

Securities registered pursuant to Section 12(g) of the Act: None

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.    Yes  x    No  ☐

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act.    Yes  ☐    No  x

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yes  x    No  ☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§ 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).    Yes  x    No  ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of "large accelerated filer," "accelerated filer," "smaller reporting company," and "emerging growth company" in Rule 12b-2 of the Exchange Act.

Large accelerated filer	x	Accelerated filer	☐	Non-accelerated filer	☐
Smaller reporting company	☐	Emerging growth company	☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Indicate by check mark whether the registrant has filed a report on and attestation to its management's assessment of the effectiveness of its internal control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm that prepared or issued its audit report. x

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act).    Yes  ☐    No  x

The aggregate market value of the shares of the registrant's Common Stock held by non-affiliates as of June 30, 2022 was approximately $17,203,000,000.

The number of shares of the registrant's Common Stock outstanding at February 1, 2023: 13,408,610.

Documents Incorporated By Reference: The portions of the registrant's Proxy Statement for the Annual Meeting of Shareholders scheduled to be held on May 17, 2023, referred to in Part III.

Markel Corporation

Form 10-K

Index

		Page Number
	Part I
Item 1.	Business	10K - 2
Item 1A.	Risk Factors	10K - 22
Item 1B.	Unresolved Staff Comments	NONE
Item 2.	Properties	NONE
Item 3.	Legal Proceedings	10K - 34
Item 4.	Mine Safety Disclosures	NONE
	Information about Our Executive Officers	10K - 35
	Part II
Item 5.	Market for Registrant's Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities	10K - 36
Item 6.	[Reserved]	NONE
Item 7.	Management's Discussion and Analysis of Financial Condition and Results of Operations	10K - 38
Item 7A.	Quantitative and Qualitative Disclosures About Market Risk	10K - 67
Item 8.	Financial Statements and Supplementary Data
	Report of Independent Registered Public Accounting Firm	10K - 71
	Consolidated Balance Sheets—December 31, 2022 and 2021	10K - 73
	Consolidated Statements of Income (Loss) and Comprehensive Income (Loss)—Years Ended December 31, 2022, 2021 and 2020	10K - 74
	Consolidated Statements of Changes in Equity—Years Ended December 31, 2022, 2021 and 2020	10K - 75
	Consolidated Statements of Cash Flows—Years Ended December 31, 2022, 2021 and 2020	10K - 76
	Notes to Consolidated Financial Statements	10K - 77
Item 9.	Changes in and Disagreements With Accountants on Accounting and Financial Disclosure	NONE
Item 9A.	Controls and Procedures	10K - 127
Item 9B.	Other Information	NONE
Item 9C.	Disclosure Regarding Foreign Jurisdictions that Prevent Inspections	NONE
	Part III
Item 10.	Directors, Executive Officers and Corporate Governance	10K - 129
Item 11.	Executive Compensation	10K - 129
Item 12.	Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters	10K - 129
Item 13.	Certain Relationships and Related Transactions, and Director Independence	10K - 129
Item 14.	Principal Accounting Fees and Services	10K - 129
	Part IV
Item 15.	Exhibits and Financial Statement Schedules	10K - 129
Item 16.	Form 10-K Summary	NONE
Exhibit Index		10K - 130
Signatures		10K - 133

PART I

Item 1. BUSINESS

Markel Corporation is a diverse financial holding company serving a variety of niche markets. We aspire to build one of the world's great companies and deploy three financial engines in pursuit of this goal.

Insurance - Our principal business markets and underwrites specialty insurance products using multiple platforms that enable us to best match risk and capital.

Investments - Our investing activities are primarily related to our underwriting operations. The majority of our investable assets come from premiums paid by policyholders and the remainder is comprised of shareholder funds.

Markel Ventures - Through our Markel Ventures operations, we own controlling interests in a diverse portfolio of businesses that operate in a variety of industries.

Our financial goals are to earn consistent underwriting and operating profits and superior investment returns to build shareholder value. We measure financial success by our ability to grow book value per common share and the market price per common share of our stock, or total shareholder return, at high rates of return over a long period of time. To mitigate effects of short-term volatility and align with the longer-term perspective we apply to operating our businesses, we generally use five-year time periods to measure our performance. Growth in book value per common share is an important measure of our success because it includes all underwriting, operating and investing results. Over the past five years, the compound annual growth in book value per common share was 6%. Growth in total shareholder value is also an important measure of our success, as a significant portion of our operations are not recorded at fair value or otherwise captured in book value. Over the past five years, our common share price increased at a compound annual rate of 3%. While these measures, considered independently of other factors, fall below our internal targets, we remain confident in the strong operating performance of our businesses.

The following graph presents book value per common share and stock price per common share for the past five years as of December 31.

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The following table presents summary financial data over the last five years, including book value per common share, market price per common share and other important financial measures and metrics.

(dollars in millions, except per share data)	2022			2021			2020			2019			2018			5-Year CAGR (1)
Results of Operations
Earned premiums	$	7,588		$	6,503		$	5,612		$	5,050		$	4,712		12	%
Net investment income	447			367			376			442			435			3	%
Net investment gains (losses)	(1,596)			1,979			618			1,602			(438)
Markel Ventures operating revenues	4,758			3,644			2,795			2,055			1,915			29	%
Total operating revenues	11,675			12,846			9,735			9,526			6,841			14	%
Net income (loss) to common shareholders	(250)			2,389			798			1,790			(128)
Comprehensive income (loss) to shareholders	(1,309)			2,078			1,192			2,094			(376)
Diluted net income (loss) per common share	$	(23.57)		$	176.51		$	55.63		$	129.07		$	(9.55)
Financial Position
Total investments, cash and cash equivalents and restricted cash and cash equivalents (invested assets)	$	27,420		$	28,292		$	24,927		$	22,258		$	19,238		6	%
Total assets	49,791			48,477			41,738			37,474			33,306			9	%
Unpaid losses and loss adjustment expenses	20,948			18,179			16,222			14,729			14,276			9	%
Shareholders' equity	$	13,066		$	14,717		$	12,822		$	11,071		$	9,081		7	%
Common shares outstanding (at year end, in thousands)	13,423			13,632			13,783			13,794			13,888
Consolidated Performance Measures
Book value per common share	$	929.27		$	1,036.20		$	887.34		$	802.59		$	653.85		6	%
5-Year CAGR in book value per common share (1)	6		%	11		%	10		%	8		%	7		%
Closing stock price	$	1,317.49		$	1,234.00		$	1,033.30		$	1,143.17		$	1,038.05		3	%
5-Year CAGR in closing stock price (1)	3		%	6		%	3		%	11		%	12		%

(1)    CAGR—compound annual growth rate.

Insurance

Our insurance engine is comprised of the following types of operations:

•Underwriting - Our underwriting operations are comprised of our risk-bearing insurance and reinsurance operations.

•Insurance-linked securities - Our insurance-linked securities (ILS) operations provide investment management services for a variety of investment products, including insurance-linked securities, catastrophe bonds, insurance swaps and weather derivatives.

•Program services - Our program services business serves as a fronting platform that provides other insurance entities access to the United States (U.S.) property and casualty insurance market.

Through our underwriting, ILS and program services operations, we have a suite of capabilities through which we can access capital to support our customers' risks, which includes our own capital through our underwriting operations, as well as third-party capital through our ILS and program services operations. Within each of these insurance platforms, we believe that our specialty product focus and niche market strategy enable us to develop expertise and specialized market knowledge. We seek to differentiate ourselves from competitors by our expertise, service, continuity and other value-based considerations, including the multiple platforms through which we can manage risk and deploy capital. For example, through our program services platform, we have programs through which we write insurance policies on behalf of our ILS operations that are supported by third-party capital. Additionally, we cede certain risks written through our underwriting operations to our ILS operations to the extent those risks are more aligned with the risk profile of our ILS investors than our own corporate tolerance. Our ability to access multiple insurance platforms allows us to achieve income streams from our insurance operations beyond the traditional underwriting model. We believe this multi-platform approach provides us with a unique

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advantage through which we have the ability to unlock additional value for our customers and business partners, which we refer to as "the power of the platform."

Underwriting

Specialty Insurance and Reinsurance

Within our underwriting operations, we underwrite specialty insurance products on a risk-bearing basis. The specialty insurance market differs significantly from the standard market. In the standard market, insurance rates and forms are highly regulated, products and coverages are largely uniform with relatively predictable exposures and companies tend to compete for customers on the basis of price. In contrast, the specialty market provides coverage for hard-to-place risks that generally do not fit the underwriting criteria of standard carriers.

Competition in the specialty insurance market tends to focus less on price than in the standard insurance market and more on other value-based considerations, such as availability, service and expertise. While specialty market exposures may have higher perceived insurance risks than their standard market counterparts, we seek to manage these risks and achieve higher financial returns. To reach our financial and operational goals, we must have extensive knowledge and expertise in our chosen markets. Many of our larger accounts are considered on an individual basis where customized forms and tailored solutions are employed.

By focusing on the distinctive risk characteristics of our insureds, we have been able to identify a variety of niche markets where we can add value with our specialty product offerings and alternative platforms through which we can access capital to support our customers' risks. Examples of niche insurance markets that we have targeted include liability coverage for highly specialized professionals, wind and earthquake-exposed commercial properties, equine-related risks, transaction-related risks, classic cars, credit and surety-related risks, collateral protection risks and marine, energy and environmental-related activities. Our market strategy in each of these areas of specialization is tailored to the unique nature of the loss exposure, coverage and services required by insureds. In each of our niche markets, we assign teams of experienced underwriters and claims specialists who provide a full range of insurance services.

We also participate in the reinsurance market in certain classes of reinsurance product offerings, primarily casualty lines and certain other specialty lines. In the reinsurance market, our clients are other insurance companies, or cedents. We typically write our reinsurance products in the form of treaty reinsurance contracts, which are contractual arrangements that provide for automatic reinsuring of a type or category of risk underwritten by cedents. Generally, we participate in reinsurance treaties with a number of other reinsurers, each with an allocated portion of the treaty, with the terms and conditions of the treaty being substantially the same for each participating reinsurer. With treaty reinsurance contracts, we do not separately evaluate each of the individual risks assumed under the contracts and are largely dependent on the individual underwriting decisions made by the cedent. Accordingly, we review and analyze the cedent's risk management and underwriting practices in deciding whether to provide treaty reinsurance and in pricing of treaty reinsurance contracts.

Our reinsurance products are written globally on both a quota share and excess of loss basis. Quota share contracts require us to share the losses and expenses in an agreed proportion with the cedent. Excess of loss contracts require us to indemnify the cedent against all or a specified portion of losses and expenses in excess of a specified dollar or percentage amount. Our reinsurance products may include features such as contractual provisions that require our cedent to share in a portion of losses resulting from ceded risks, may require payment of additional premium amounts or provide experience refunds if the losses we incur differ from those projected at the time of the execution of the contract or may require a reinstatement premium to restore coverage after there has been a loss occurrence.

We distinguish ourselves in the reinsurance market by the expertise of our underwriting teams, our access to global reinsurance markets, our ability to offer large capacity lines and our ability to customize reinsurance solutions to fit our cedents' needs. Additionally, as with our insurance underwriting operations, our ability to access third-party capital through our ILS and program services platforms provides additional capital alternatives to support certain risks, to the extent those risks do not align with our underwriting risk tolerance. For example, we do not write property reinsurance business, including catastrophe-exposed property business, on a risk-bearing basis. Such business is only written on behalf of our ILS operations, to the extent it matches the risk profile of our third-party ILS investors, who provide the capital to support the risk. See "Program Services and Other Fronting" for further discussion of business written on behalf of our ILS operations.

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The following chart presents the composition of our underwriting operations between insurance and reinsurance based on 2022 gross premium volume of $9.8 billion, which also aligns with our two reportable underwriting segments.

The Insurance segment includes all of our direct business and facultative placements and is written through our Markel Specialty, Markel International and State National divisions, with the exception of our State National division's program services business, which is not included in a reportable segment. The Reinsurance segment includes all treaty reinsurance and is primarily written through our Global Reinsurance division. Additional detail regarding our underwriting divisions and products is included in "Underwriting Segments."

The following table summarizes our U.S. insurance and reinsurance underwriting subsidiaries.

U.S. Legal Entity	Abbreviation	State of Domicile
Essentia Insurance Company	Essentia	Missouri
Evanston Insurance Company	EIC	Illinois
FirstComp Insurance Company	FCIC	Nebraska
Markel American Insurance Company	MAIC	Virginia
Markel Global Reinsurance Company	MGRC	Delaware
Markel Insurance Company	MIC	Illinois
National Specialty Insurance Company	NSIC	Texas
State National Insurance Company, Inc.	SNIC	Texas
SureTec Insurance Company	SIC	Texas

Through these U.S. insurance and reinsurance subsidiaries, we are licensed, authorized, or accredited to write business in all 50 states and the District of Columbia.

The following table summarizes our international insurance and reinsurance underwriting subsidiaries.

International Legal Entity	Abbreviation	Country
Markel Bermuda Limited	MBL	Bermuda
Markel Insurance SE	MISE	Germany
Markel International Insurance Company Limited	MIICL	United Kingdom
Markel Syndicate 3000	Syndicate 3000	United Kingdom

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Markets and Distribution

Our underwriting operations write business on a global basis and utilize multiple distribution channels to access our targeted risks.

In the U.S., we write business in the excess and surplus lines (E&S) and admitted insurance markets, as well as the reinsurance market. The primary distribution channels through which our U.S. business is placed are wholesale insurance and reinsurance brokers, retail insurance agents and alternative channels that include third-party managing general agents.

The E&S, or non-admitted, market focuses on hard-to-place risks and loss exposures that generally are not written in the standard market. U.S. insurance regulations generally require an E&S account to be declined by admitted carriers before an E&S company may write the business. E&S eligibility allows our insurance subsidiaries to underwrite unique loss exposures with more flexible policy forms and unregulated premium rates. This typically results in coverages that are more restrictive and more expensive than coverages in the standard market. The E&S market is accessed primarily through wholesale insurance and reinsurance brokers, which have limited quoting and binding authority. In 2021, the E&S market represented $83 billion, or 10%, of the $798 billion U.S. property and casualty industry.1 In 2021, we were the third largest E&S writer in the U.S. as measured by direct premium writings.1 Our E&S insurance operations are conducted through EIC.

Our U.S. business written in the admitted market focuses on unique and hard-to-place risks in the standard market, some of which must remain with an admitted insurance company for marketing and regulatory reasons. Hard-to-place risks written in the admitted market cover insureds engaged in similar, but highly specialized, activities that require a total insurance program not otherwise available from standard insurers or insurance products that are overlooked by large admitted carriers. The admitted market is subject to more state regulation than the E&S market, particularly with regard to rate and form filing requirements, restrictions on the ability to exit lines of business, premium tax payments and membership in various state associations, such as state guaranty funds and assigned risk plans. Business written in the admitted market is placed primarily by retail insurance agents. We are looking for opportunities to expand our business placed through retail insurance agents in order to capture additional business in the admitted market that fits our risk profile. Our admitted business is also placed through managing general agents, which have broader underwriting authority than retail agents. These agents are carefully selected based on a track record of proficiency with their selected products, and the business written is controlled through regular audits and pre-approvals. In addition, certain products and programs written on an admitted basis are marketed directly to consumers. The majority of our admitted insurance operations are conducted through MIC, MAIC, FCIC and Essentia. Our admitted operations also include SIC, SNIC and NSIC.

Our U.S. reinsurance operations are conducted through MGRC. Reinsurance business is placed primarily through wholesale reinsurance brokers. We were the 41st largest reinsurer in 2021 as measured by worldwide gross reinsurance premium writings.2

We also participate in the London insurance and reinsurance market, which is known for its ability to provide innovative, tailored coverage and capacity for unique and hard-to-place risks. Hard-to-place risks in the London market are generally distinguishable from standard risks due to the complexity or significant size of the risk. It is primarily a broker market, which means that insurance brokers bring most of the business to the market. Risks written in this market are written on either a direct basis or a subscription basis, the latter of which means that loss exposures brought into the market are typically insured by more than one insurance company or Lloyd's of London (Lloyd's) syndicate, often due to the high limits of insurance coverage required. When we write business in the subscription market, we prefer to participate as lead underwriter in order to control underwriting terms, policy conditions and claims handling. We participate in the London insurance and reinsurance market primarily through Markel Capital Limited (Markel Capital) and MIICL. Markel Capital is the corporate capital provider for Syndicate 3000, through which our Lloyd's operations are conducted. Syndicate 3000 is managed by Markel Syndicate Management Limited. In addition to their headquarters in London, Markel Capital and MIICL have offices across the United Kingdom (U.K.), Europe, Canada, Asia and the Middle East through which we are able to offer insurance and reinsurance. The London insurance market produced approximately $94 billion of gross written premium in 2021, of which $53 billion was produced by Lloyd's syndicates.3,4 In 2021, our share of the London market was approximately 2% as measured by gross written premiums.

1 Market Segment Report - U.S. Surplus Lines, A.M. Best (September 6, 2022)

2 Market Segment Report - Global Reinsurance, A.M. Best (August 31, 2022)

3 London Company Market Statistics Report, International Underwriting Association (September 2022)

4 Lloyd's Annual Report 2021

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In Bermuda, which is known for its significant concentration of insurance and reinsurance businesses, we participate in the worldwide insurance and reinsurance markets. The Bermuda property and casualty market is a significant source of capital for the U.S. market and the leading location for cessions by U.S. insurers.5 Business written in the Bermuda market is typically placed by a Bermuda-based wholesale broker. The Bermuda market produced $83 billion of gross written premium in 2020.6 In 2020, our share of the Bermuda market was approximately 1% as measured by gross written premiums in our underwriting operations. We conduct our Bermuda underwriting operations through MBL, which is registered as a Class 4 insurer and Class C long-term insurer under the insurance laws of Bermuda.

In Europe, we also write business through Syndicate 3000 and MISE, a regulated insurance carrier located in Munich, Germany. From its offices in Germany, MISE transacts business in European Union (E.U.) member states and throughout the European Economic Area (EEA). MISE has established branches in Ireland, the Netherlands, Spain, Switzerland, France and the U.K. Syndicate 3000 supplements, or serves as an alternative to, MISE for access to the E.U. markets.

While we operate in various other markets, substantially all of our gross written premiums in 2022 were written from our platforms in the United States, United Kingdom, Bermuda and Germany. In 2022, 80% of gross premium writings from our global underwriting operations were attributed to risks or cedents located in the United States. In each of the markets in which we operate, we seek to develop and capitalize on relationships with insurance and reinsurance brokers, insurance and reinsurance companies, large global corporations and financial intermediaries to develop and underwrite business. A significant volume of premium for the property and casualty insurance and reinsurance industry is produced through a small number of large insurance and reinsurance brokers. In 2022, the top three independent brokers accounted for 28% of gross premiums written in our underwriting segments. Additionally, a significant portion of the reinsurance contracts securitized through our ILS operations, for the benefit of third-party investors, are placed through these three independent brokers.

Ceded Reinsurance

In a reinsurance transaction, an insurance company transfers, or cedes, all or part of its exposure in return for a premium. In a retrocessional reinsurance transaction, a reinsured exposure is further ceded to another reinsurer. Within our underwriting operations, we seek to retain as much of our profitable business as possible while managing volatility within our underwriting results. We purchase reinsurance and retrocessional reinsurance to manage our net retention on individual risks and overall exposure to losses, while providing us with the ability to offer policies with sufficient limits to meet policyholder needs. This includes purchasing sufficient coverage for our catastrophe-exposed policies to ensure that our net retained catastrophe risk is within our corporate tolerances. Our exposure to catastrophe risk has been significantly reduced over the past two years with the discontinuation of our retrocessional reinsurance business and the transition of our property reinsurance business from our underwriting operations to our Nephila ILS operations, where it is placed with third-party capital. See "Program Services and Other Fronting" for further discussion of this business. We continue to have exposure to property risks within our insurance operations.

For our professional liability and general liability lines of business within our insurance operations, we typically purchase excess of loss coverage. On product lines with property exposures, we purchase both excess of loss and proportionate coverages to reduce our exposure to large losses, including catastrophes. The structure of our reinsurance purchases may vary from year to year depending on the availability and cost of reinsurance, as determined by current market conditions. In such instances, we may in turn modify our gross premium writings in order to to manage our overall net loss exposures. Net retention of gross premium volume in our underwriting segments was 83% in 2022.

Reinsurance and retrocessional treaties are generally purchased on an annual basis and are subject to renegotiation at renewal. In most circumstances, the reinsurer remains responsible for all business produced before termination. Treaties typically contain provisions concerning ceding commissions, required reports to reinsurers, responsibility for taxes, arbitration in the event of a dispute and provisions that allow us to demand that a reinsurer post letters of credit or assets as security if a reinsurer becomes an unauthorized reinsurer under applicable regulations or if its rating falls below an acceptable level.

Our ceded reinsurance and retrocessional contracts do not legally discharge us from our primary liability for the full amount of the policies, and we will be required to pay the loss and bear collection risk if the reinsurer fails to meet its obligations under the reinsurance agreement. We attempt to minimize credit exposure to reinsurers through adherence to internal ceded reinsurance guidelines. We manage our exposures so that no unsecured exposure to any one reinsurer is material to our ongoing business.

5 Offshore Reinsurance in the U.S. Market, Reinsurance Association of America (2020)

6 Bermuda Monetary Authority 2021 Annual Report

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When appropriate, we pursue reinsurance commutations that involve the termination of ceded reinsurance and retrocessional reinsurance contracts. Our commutation strategy related to ceded reinsurance and retrocessional contracts is to reduce credit exposure and eliminate administrative expenses associated with the run-off of ceded reinsurance placed with certain reinsurers.

See note 12 of the notes to consolidated financial statements included under Item 8 and Item 7A Quantitative and Qualitative Disclosures About Market Risk for additional information about our ceded reinsurance programs and exposures.

Competition and Underwriting Philosophy

We compete with numerous domestic and international insurance companies and reinsurers, Lloyd's syndicates, risk retention groups, insurance buying groups, risk securitization programs, alternative capital sources, such as that provided through ILS, and alternative self-insurance mechanisms. We also compete with new companies that continue to be formed to enter the insurance and reinsurance markets, particularly companies with new or "disruptive" technologies or business models. Competition may take the form of lower prices, broader coverages, greater product flexibility, enhanced digital capabilities for distribution of insurance products, higher coverage limits, higher quality services or higher ratings by independent rating agencies. In all of our markets, we compete on the basis of overall financial strength, ratings assigned by independent rating agencies, development of specialty products to satisfy well-defined market needs and by maintaining relationships with agents, brokers and insureds who rely on our expertise. This expertise is our principal means of competing. We offer a diverse portfolio of products, each with its own distinct competitive environment, which requires us to be responsive to changes in market conditions for individual product lines. With each of our products, we seek to write business that produces consistent underwriting profits by competing with innovative ideas, appropriate pricing, expense control and quality service to policyholders, agents and brokers. We also leverage our underwriting capacity and expertise through relationships with start-ups and digital distribution partners through which we can develop ideas that leverage emerging technologies and modern customer acquisition strategies to create the service and experience that consumers have grown to expect and demand.

Few barriers exist to prevent insurers and reinsurers from entering our markets within the property and casualty industry. Market conditions, risk tolerance and capital capacity influence the degree of competition at any point in time. During periods of excess underwriting capacity, as defined by availability of capital, competition can result in lower pricing and less favorable policy terms and conditions for insurers. During periods of reduced underwriting capacity, pricing and policy terms and conditions are generally more favorable for insurers. Historically, the performance of the property and casualty insurance and reinsurance industries has tended to fluctuate in cyclical periods of price competition and excess underwriting capacity, followed by periods of high premium rates and shortages of underwriting capacity. At any given time, our portfolio of insurance products could be experiencing varying combinations of these characteristics. This cyclical market pattern can be more pronounced in the specialty insurance and reinsurance markets in which we compete than the standard insurance market.

Following several years of price decreases and the high level of natural catastrophes that occurred in 2017, we began seeing more favorable rates in 2018, particularly on our catastrophe-exposed and loss-affected business. Since 2018, we have continued to see rate strengthening across most product lines following the continued high level of natural catastrophes and significant losses attributed to the COVID-19 pandemic, as well as general market conditions. However, we began to see rate increases moderate on many of our product lines in 2022. In some product lines, such as directors and officers, we even began to see single digit rate decreases in the latter part of 2022. The overall strengthening of rates in recent years has been most prominent within our professional liability and general liability product lines, reflecting the impacts of both economic and social inflation on loss costs. Recent increases in economic and social inflation have created more uncertainty around the ultimate losses that will be incurred to settle claims on these longer-tail product lines. These factors, as well as the impacts of the low interest rate environment on interest income in recent years, have contributed to the strong rate environment. The primary exception to the favorable rate environment is workers' compensation, where we continue to see low single digit rate decreases given generally favorable loss experience in recent years.

By focusing on market niches where we have underwriting expertise, and leveraging capabilities offered through our multiple insurance platforms, we seek to earn consistent underwriting profits, which are a key component of our strategy. The property and casualty insurance industry commonly defines underwriting profit or loss as earned premiums net of losses and loss adjustment expenses and underwriting, acquisition and insurance expenses. We believe that the ability to achieve consistent underwriting profits demonstrates knowledge and expertise, commitment to superior customer service and the ability to manage insurance risk. We use underwriting profit or loss as a basis for evaluating our underwriting performance. The combined ratio is a measure of underwriting performance and represents the relationship of incurred losses, loss adjustment expenses and underwriting, acquisition and insurance expenses to earned premiums. A combined ratio less than 100% indicates an underwriting profit, while a combined ratio greater than 100% reflects an underwriting loss. In 2022, our

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combined ratio was 92%. See Item 7 Management's Discussion & Analysis of Financial Condition and Results of Operations for a discussion of our underwriting results.

We routinely review the pricing of our major product lines. When we believe the prevailing market price will not support our underwriting profit targets, the business is not written. As a result of our underwriting discipline, gross premium volume may vary when we alter our product offerings to maintain or improve underwriting profitability.

Over the past few years, we have increased our focus on growing our most profitable lines of business and have discontinued certain lines or programs that have not performed consistent with our expectations. This is particularly true within our Reinsurance segment, where in 2021, we discontinued writing property reinsurance business, including catastrophe-exposed property business, on a risk-bearing basis, and in 2022, we discontinued writing property retrocessional reinsurance business. In more limited instances, we have taken similar actions within our Insurance segment. We saw the benefit of these changes in our underwriting results in 2022, which reflected a lower impact from Hurricane Ian than we would have expected absent these changes.

Underwriting Segments

We monitor and assess the performance of our ongoing underwriting operations on a global basis in the following two segments: Insurance and Reinsurance. See note 2 of the notes to consolidated financial statements included under Item 8 for additional segment reporting disclosures.

Insurance Segment

Our Insurance segment reported gross premium volume of $8.6 billion, earned premiums of $6.5 billion and an underwriting profit of $549.9 million in 2022. The following chart presents the composition of our Insurance segment by division based on 2022 gross premium volume.

The Markel Specialty division writes business for insureds from individuals and small businesses to Fortune 1000 companies in the U.S., Bermuda, the U.K. and the E.U. The Markel Specialty division is a unified platform that provides easy access to our diverse portfolio of products and capabilities. The Markel International division writes business worldwide from our London and Munich-based platforms, which include branch offices around the world. The State National division writes collateral protection insurance in the U.S., which insures personal automobiles and other vehicles held as collateral for loans made by credit unions, banks and specialty finance companies through its lender services product line on both an admitted and non-admitted basis.

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The following chart displays the types of products written in our Insurance segment based on 2022 gross premium volume.

Our professional liability product lines provide insurance solutions for small, middle market and risk management accounts with coverage that is tailored to their exposures and needs. Professional liability coverages include errors and omissions, directors and officers, cyber, employment practices liability, professional indemnity, transaction liability, intellectual property and union liability. Errors and omissions coverage provides solutions for specialized professions including lawyers, accountants, agents and brokers, service technicians and consultants, as well as other less-specialized professionals. Directors and officers coverage is provided for publicly-traded, private and non-profit companies, including financial institutions and Fortune 1000 companies. Cyber products provide coverage for, among other things, data breach and privacy liability, data breach loss to insureds and electronic media coverage. We also offer claims-made professional liability coverage for individual healthcare providers, such as therapists, pharmacists, physician assistants and nurse anesthetists, and coverages for medical facilities and other allied healthcare risks, such as clinics, laboratories, pharmacies and senior living facilities.

General liability product offerings include a variety of primary and excess liability coverages. We focus on businesses in the construction, life sciences, energy, medical, healthcare, pharmaceutical, professional services, social welfare, recreational, transportation, heavy industrial and hospitality industries. Specific products include primary general liability, excess and umbrella products, products liability products, environmental liability products and casualty facultative reinsurance written for individual casualty risks.

Personal lines products provide first and third-party coverages in the U.S. for classic cars, motorcycles and a variety of personal watercraft, including vintage boats, high-performance boats and yachts and recreational vehicles, such as motorcycles, snowmobiles and ATVs. Based on the seasonal nature of much of our personal lines business, we generally will experience higher claims activity during the second and third quarters of the year. Additionally, property coverages are offered for mobile homes, dwellings and homeowners that do not qualify for standard homeowner's coverage, as well as personal umbrella coverage.

Marine and energy products include a portfolio of coverages for cargo, energy, hull, liability, war and terrorism risks worldwide. The cargo product line is an international transit-based book providing coverage for many types of cargo. Energy coverage includes all aspects of oil, gas and renewable energy activities. Hull coverages consist of coverage for physical damage to ocean-going tonnage, yachts and mortgagees' interests. Liability coverage provides for a broad range of energy liabilities, as well as traditional marine exposures including charterers, terminal operators and ship repairers. War coverage includes protections for the hulls of ships, and other related interests, against war and associated perils. Terrorism coverage provides for property damage and business interruption related to political and civil violence including war and civil war.

Property coverages consist principally of fire, allied lines (including windstorm, hail and water damage) and other specialized property coverages, including catastrophe-exposed property risks such as earthquake and wind on both a primary and excess basis. Catastrophe-exposed property risks are typically lower frequency and higher severity in nature than more standard property risks. Our property coverages are exposed to windstorm losses that, based on the seasonal nature of those events, are more likely to occur in the third and fourth quarters of the year. Our property risks range from small, single-location accounts

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to large, multi-state, multi-location, multi-national accounts on a worldwide basis. Other types of property products include inland marine products, railroad-related products and specie coverage for fine art on exhibition and in private collections.

Specialty programs business is offered in the U.S. on a standalone or package basis and generally targets specialized commercial markets and various customer groups, such as amateur sports and fitness clubs. Certain specialty programs written in this segment use managing general agents to offer single source admitted and non-admitted programs for a specific industry, class or line of business, including first and third-party coverages such as packaged policies for providers of leisure and recreational activities.

Workers' compensation products are offered in the U.S. and provide wage replacement and medical benefits to employees injured in the course of employment and target main-street, service and artisan contractor businesses, retail stores and restaurants.

Credit and surety products consist primarily of trade credit and prepayment coverage and a range of bonds and guarantees that support contractual obligations, as well as other coverages for specific credit risks, markets and contingencies. Key risks covered include those of counterparty insolvency and defaults by government-owned entities. The key coverages under surety products include contractual performance and payment risks, commercial license and permit obligations and obligations related to judicial proceedings such as court and fiduciary bonds.

Other product lines within the Insurance segment include auto and collateral protection insurance.

Reinsurance Segment

Our Reinsurance segment product offerings are underwritten primarily by our Global Reinsurance division, which operates from platforms in the U.S., Bermuda and the U.K. We write quota share and excess of loss reinsurance on a local, national and global basis. Our Reinsurance segment reported gross premium volume of $1.2 billion, earned premiums of $1.1 billion and an underwriting profit of $83.9 million in 2022. The following chart displays the types of products written in our Reinsurance segment based on 2022 gross premium volume.

Professional liability reinsurance primarily consists of the following:

•Transaction liability, which provides representation, warranty and indemnity coverage for mergers and acquisitions, including coverage for tax and contingent liability;

•Directors and officers liability for publicly-traded, private and non-profit companies;

•Cyber and technology errors and omissions covering both first and third-party exposures;

•Errors and omissions for lawyers, accountants, agents and brokers, services technicians and consultants; and

•Healthcare liability for physicians, hospitals, long-term care and other medical facilities.

General liability reinsurance primarily consists of umbrella and excess casualty products, as well as environmental liability products covering pollution legal liability and contractors' pollution exposures.

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Our specialty treaty reinsurance products are also written on a quota share and excess of loss basis across a wide range of specialty product lines, primarily consisting of the following:

•Credit and surety products, including structured and whole turnover credit, political risk and contract and commercial surety reinsurance programs covering worldwide exposures;

•Workers' compensation and accident and health covering both standard and catastrophe-exposed business in the U.S. and worldwide;

•Marine and energy products, both offshore and onshore marine, energy and renewable energy risks on a worldwide basis, including hull, cargo and liability;

•Public entity reinsurance products offering casualty coverage for municipalities, schools, special districts, public housing authorities and public entity affiliated non-profits;

•Mortgage default insurance offering coverage for private mortgage insurers predominantly located in the U.S. and Australia;

•Aviation and space coverage, including major risk, general aviation, satellite launch and orbit;

•Agriculture reinsurance covering multi-peril crop insurance, hail and related exposures for risks located in the U.S. and Canada; and

•Discrete political violence and national terror pools in select jurisdictions globally.

Previously, we also wrote property reinsurance and retrocessional reinsurance business. We discontinued writing these lines effective January 1, 2021 and 2022, respectively, and effective January 1, 2022, we were off-risk for substantially all property loss exposures, including catastrophe exposures, previously written within our Reinsurance segment. Any such business is now written on behalf of our Nephila ILS operations to the extent it matches the risk-profile of our third-party ILS investors, who will ultimately assume the risk.

Insurance-Linked Securities

Our insurance-linked securities operations are primarily comprised of our Nephila operations and are not included in a reportable segment. Nephila Holdings Ltd. (together with its subsidiaries, Nephila) provides investment and insurance management services through which we offer alternative capital to the reinsurance market while providing investors with investment strategies that typically are uncorrelated with traditional asset classes. We receive management fees for investment and insurance management services provided through these operations primarily based on the net asset value of the accounts managed, and for certain funds, incentive fees based on their annual performance. Through 2022, we also provided risk origination services for our fund management operations, as well as for third parties, through our Velocity and Volante managing general agent companies and received commissions based on the direct written premiums of the insurance contracts placed. Total revenues from our insurance-linked securities operations for the year ended December 31, 2022 were $338.3 million, which included $225.8 million of gains from the sales of our managing general agent operations.

Our fund management operations provide insurance and investment management services for a broad range of investment products for insurance and reinsurance companies, government entities, banks, hedge funds, pension funds and institutional investors, including insurance-linked securities, catastrophe bonds, insurance swaps and weather derivatives. Nephila serves as the investment manager to several Bermuda based private funds (the Nephila Funds). To provide access for the Nephila Funds to a variety of insurance-linked securities in the property catastrophe, climate and specialty markets, Nephila acts as an insurance manager to certain Bermuda Class 3 and 3A reinsurance companies, Lloyd's Syndicate 2357 and Lloyd's Syndicate 2358 (collectively, the Nephila Reinsurers). The results of the Nephila Reinsurers are attributed to the Nephila Funds primarily through derivative transactions between these entities. Neither the Nephila Funds nor the Nephila Reinsurers are subsidiaries of Markel Corporation, and as such, these entities are not included in our consolidated financial statements.

The Nephila Reinsurers subscribe to various reinsurance contracts based on their investors' risk profiles, including property and specialty reinsurance business fronted through our underwriting and program services platforms. We write this business on behalf of our Nephila ILS operations to the extent it fits Nephila investors' risk profile and cede substantially all of the risk to Nephila Reinsurers. See note 18 of the notes to consolidated financial statements included under Item 8 for further details regarding transactions with entities managed through our Nephila operations.

Since our acquisition of Nephila in 2018, we experienced significant growth in the Velocity and Volante managing general agent operations. We realized the value created since 2018 through the sale of Velocity in February 2022 and Volante in October 2022. See Note 3 of the notes to consolidated financial statements included under Item 8 for additional details regarding these transactions.

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Following the sales of our Velocity and Volante managing general agent operations, our Nephila ILS operations are solely comprised of our fund management operations. Since acquiring Nephila in 2018, investment performance in the broader ILS market has been adversely impacted by consecutive years of elevated catastrophe losses, most recently with Hurricane Ian in 2022. These events, as well as recent volatility in the capital markets, have impacted investor decisions around allocation of capital to ILS, which in turn has impacted our capital raises and redemptions within the funds we manage. As of December 31, 2022, Nephila's net assets under management were $7.2 billion.

Our insurance-linked securities operations also include our run-off Markel CATCo operations, the results of which are reported separately from our ongoing insurance-linked securities operations. Our Markel CATCo operations are conducted through Markel CATCo Investment Management Ltd. (MCIM), an ILS investment fund manager headquartered in Bermuda. MCIM serves as the insurance manager for Markel CATCo Re Ltd. (Markel CATCo Re), a Bermuda Class 3 reinsurance company, and as the investment manager for Markel CATCo Reinsurance Fund Ltd., a Bermuda exempted mutual fund company comprised of multiple segregated accounts (Markel CATCo Funds). In July 2019, these operations were placed into run-off. In March 2022, we completed a buy-out transaction that provided for an accelerated return of all remaining capital to investors in the Markel CATCo Funds. Following the completion of the buy-out transaction, we consolidate Markel CATCo Re as its primary beneficiary. Results attributable to the run-off of Markel CATCo Re are included with our other Markel CATCo operations within services and other expenses, and for the year ended December 31, 2022, these results were entirely attributable to noncontrolling interest holders in Markel CATCo Re. In connection with the buy-out transaction, we entered into a tail risk cover with Markel CATCo Re through which we have uncollateralized exposure to adverse development on loss reserves held by Markel CATCo Re for loss exposures in excess of limits that we believe are unlikely to be exceeded. For further details regarding our Markel CATCo operations and the consolidation of Markel CATCo Re, see note 17 of the notes to consolidated financial statements included under Item 8 and for further details regarding the buy-out transaction, see note 21 of the notes to consolidated financial statements included under Item 8.

Program Services and Other Fronting

Our program services business generates fee income in the form of ceding fees in exchange for fronting insurance business to other insurance carriers (capacity providers). In general, fronting refers to business in which we write insurance on behalf of a general agent or capacity provider and then cede all, or substantially all, of the risk under these policies to the capacity provider in exchange for ceding fees. The results of our program services operations are not included in a reportable segment.

Our program services business, which is provided through our State National division, offers issuing carrier capacity to both specialty managing general agents and other producers who sell, control and administer books of insurance business that are supported by third parties that assume reinsurance risk, including the Nephila Reinsurers. These reinsurers are domestic and foreign insurers and institutional risk investors that want to access specific lines of U.S. property and casualty insurance business but may not have the required licenses and filings to do so.

Through our program services business, we write a wide variety of insurance products, principally including general liability, commercial liability, commercial multi-peril, property and workers' compensation. Program services business written through our State National division is separately managed from our underwriting divisions, which write similar products, in order to protect our program services customers.

The following table summarizes the subsidiaries through which our program services business is written.

Legal Entity	Abbreviation	State of Domicile
City National Insurance Company	CNIC	Texas
Independent Specialty Insurance Company	ISIC	Delaware
National Specialty Insurance Company	NSIC	Texas
Pinnacle National Insurance Company	PNIC	Texas
State National Insurance Company, Inc.	SNIC	Texas
Superior Specialty Insurance Company	SSIC	Delaware
United Specialty Insurance Company	USIC	Delaware

These subsidiaries are authorized or licensed to write property and casualty insurance in all 50 states and the District of Columbia. Many of our programs are arranged with the assistance of brokers that are seeking to provide customized insurance solutions for specialty insurance business that requires a carrier rated "A" by A.M. Best Company (Best). Our specialized

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business model relies on third-party producers or capacity providers to provide the infrastructure associated with providing policy administration, claims handling, cash handling, underwriting, or other traditional insurance company services. We compete primarily on the basis of price, customer service, geographic coverage, financial strength ratings, licenses, reputation, business model and experience.

Total revenues attributed to our program services business for the year ended December 31, 2022 were $133.3 million. Our program services business generated $2.8 billion of gross written premium volume for the year ended December 31, 2022.

In our program services business, we generally enter into quota share reinsurance agreements whereby we cede to the capacity providers substantially all of our gross liability under all policies issued by and on behalf of us by the producer. The capacity providers are generally entitled to 100% of the net premiums received on policies reinsured, less the ceding fee to us, the commission paid to the producer and premium taxes on the policies. In connection with writing this business, we also enter into agency agreements with both the producer and the capacity providers whereby the producer and capacity providers are generally required to deal directly with each other to develop business structures and terms to implement and maintain the ongoing contractual relationship. In a number of cases, the producer and capacity providers for a program are part of the same organization or are otherwise affiliated. As a result of our contract design, substantially all of the underwriting risk and operational risk inherent in the arrangement is borne by the capacity providers. The capacity providers assume and are liable for substantially all losses incurred in connection with the risks under the reinsurance agreement, including judgments and settlements. Our contracts with capacity providers do not legally discharge us from our primary liability for the full amount of the policies, and we will be required to pay the loss and bear collection risk if a capacity provider fails to meet its obligations under the reinsurance agreement. As a result, we remain exposed to the credit risk of capacity providers, or the risk that one of our capacity providers becomes insolvent or otherwise unable or unwilling to pay policyholder claims. We mitigate this credit risk generally by either selecting well capitalized, highly rated authorized capacity providers or requiring that the capacity provider post substantial collateral to secure the reinsured risks, which, in some instances, exceeds the related reinsurance recoverable.

In certain instances, we also leverage the strength of our underwriting platform to write business on behalf of our ILS operations, in exchange for ceding fees, to support their business plans and assist in meeting their desired return objectives. This fronting business is conducted separately from our program services business and consists of catastrophe-exposed property insurance and reinsurance business and specialty reinsurance business.

Although we reinsure substantially all of the risks inherent in our program services business and ILS fronting arrangements, we have certain programs that contain limits on our reinsurers' obligations to us that expose us to underwriting risk, including loss ratio caps, aggregate reinsurance limits or exclusion of the credit risk of producers. Under certain programs, including programs and contracts with Nephila Reinsurers, we also bear underwriting risk for annual aggregate agreement year losses in excess of a limit that we believe is unlikely to be exceeded. See note 18 of the notes to consolidated financial statements included under Item 8 for further details regarding our programs with Nephila Reinsurers.

Ratings

Financial stability and strength are important purchase considerations of policyholders, cedents and insurance agents and brokers. Because an insurance premium paid today purchases coverage for losses that might not be paid for many years, the financial viability of the insurer is of critical concern. Various independent rating agencies provide information and assign ratings to assist buyers in their search for financially sound insurers. Rating agencies periodically re-evaluate assigned ratings based upon changes in the insurer's operating results, financial condition or other significant factors influencing the insurer's business. Changes in assigned ratings could have an adverse impact on an insurer's ability to write new business.

Rating agencies assign financial strength ratings (FSRs) to property and casualty insurance companies based on quantitative criteria such as profitability, leverage and liquidity, as well as qualitative assessments such as the spread of risk, the adequacy and soundness of ceded reinsurance, the quality and estimated market value of assets, the adequacy of loss reserves and surplus and the competence, experience and integrity of management.

Seventeen of our eighteen insurance subsidiaries are rated by Best. All seventeen of our insurance subsidiaries rated by Best have been assigned an FSR of "A" (excellent). Our Lloyd's syndicate is part of a group rating for the Lloyd's overall market, which has been assigned an FSR of "A" (excellent) by Best.

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Nine of our eighteen insurance subsidiaries are rated by Standard & Poor's (S&P). All nine of our insurance subsidiaries rated by S&P have been assigned an FSR of "A" (strong). Our Lloyd's syndicate is part of a group rating for the Lloyd's overall market, which has been assigned an FSR of "A+" (strong) by S&P.

Five of our eighteen insurance subsidiaries are rated by Moody's Corporation (Moody's). All five insurance subsidiaries rated by Moody's have been assigned an FSR of "A2" (good).

Investments

Our business strategy recognizes the importance of both consistent underwriting and operating profits and superior investment returns to build shareholder value. The majority of our investable assets come from premiums paid by policyholders. We rely on sound underwriting practices to produce investable funds. Policyholder funds are invested predominantly in high-quality government and municipal bonds and mortgage-backed securities that generally match the duration and currency of our loss reserves. We typically hold these fixed maturity investments until maturity. As a result, unrealized holding gains and losses on these securities are generally expected to reverse as the securities mature. Premiums collected through our underwriting operations may also be held as short-term investments or cash and cash equivalents to provide short-term liquidity for projected claims payments, reinsurance costs and operating expenses. The balance of our investable assets, comprised of shareholder funds, is available to be invested in equity securities, which over the long run, have produced higher returns relative to fixed maturity and short-term investments. When purchasing equity securities, we seek to invest in profitable companies, with honest and talented management, that exhibit reinvestment opportunities and capital discipline, at reasonable prices. We intend to hold these equity investments over the long-term. Substantially all of our investment portfolio is managed by company employees.

Invested assets, comprised of fixed maturity securities, equity securities, short-term investments, cash and cash equivalents and restricted cash and cash equivalents, were $27.4 billion at December 31, 2022. The following chart displays the composition of our invested assets as of December 31, 2022.

We measure our investment performance by analyzing net investment income earned on our investment portfolio, as well as through net investment gains, which includes unrealized gains on our equity portfolio, and the change in net unrealized investment gains on available-for-sale investments. Our performance measures also include investment yield and taxable equivalent total investment return, which is a non-GAAP financial measure. We focus on long-term investment performance, understanding that the level of investment gains or losses and unrealized gains or losses may vary from one period to the next.

Markel Ventures

Through our wholly owned subsidiary Markel Ventures, Inc. (Markel Ventures), we own controlling interests in various high-quality businesses that operate in a variety of different industries with the shared goal of positively contributing to the long-term financial performance of Markel Corporation. Management teams for each business operate autonomously and are responsible for developing strategic initiatives, managing day-to-day operations and making investment and capital allocation decisions for their respective companies.

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Our corporate management team is responsible for decisions regarding allocation of capital for acquisitions and new investments. Our strategy in making these acquisitions is similar to our strategy for purchasing equity securities. We seek to invest in profitable companies, with honest and talented management, that exhibit reinvestment opportunities and capital discipline, at reasonable prices. We intend to own the businesses acquired for a long period of time. Our chief operating decision maker allocates resources to and assesses the performance of these various businesses in the aggregate as the Markel Ventures segment. See note 2 of the notes to consolidated financial statements included under Item 8 for additional segment reporting disclosures.

The Markel Ventures segment includes a diverse portfolio of specialized businesses from different industries that offer various types of products and services to businesses and consumers across many markets. All of our businesses in this segment are headquartered in the U.S., with subsidiaries of certain businesses located outside of the U.S. During the last three years, our Markel Ventures operations have expanded through acquisitions of majority interests in various businesses, including Metromont LLC and Buckner HeavyLift Cranes in 2021 and Lansing Building Products, LLC in 2020. See note 3 of the notes to consolidated financial statements included under Item 8 for additional details related to these acquisitions. This follows acquisitions of VSC Fire & Security, Inc. in 2019 and Brahmin Leather Works LLC in 2018. We continue to look for acquisition opportunities that align with our investment criteria and strategic objectives around diversification and specialization.

In 2022, our Markel Ventures operations reported revenues of $4.8 billion, operating income of $325.2 million, net income to shareholders of $192.6 million and earnings before interest, income taxes, depreciation and amortization (EBITDA) of $506.3 million. We use Markel Ventures EBITDA, which is a non-GAAP financial measure, as an operating performance measure in conjunction with revenues, operating income and net income. See "Markel Ventures" under Item 7 Management's Discussion & Analysis of Financial Condition and Results of Operations for more information on our Markel Ventures results, including EBITDA.

The following chart displays the types of businesses within our Markel Ventures segment based on 2022 operating revenues. Our senior management team does not manage the Markel Ventures portfolio of businesses at this level of aggregation due to the distinct characteristics of each business and the autonomy with which local management operates each business.

Products and services offered through these types of businesses include:

•Construction Services - Companies that provide distribution services for exterior building products, crane rental services and fire protection and life safety services to other businesses in the U.S. construction market;

•Consumer and Building Products - Companies that produce or build ornamental plants, precast concrete solutions, residential homes, luxury handbags and architectural products, which are primarily sold to consumers in the U.S. retail and housing markets;

•Transportation-Related Products - Companies that manufacture and sell over-the-road car haulers, laminated oak and composite wood flooring and tube and tank trailers primarily used in the U.S. trucking industry;

•Consulting Services - Companies that provide management and technology consulting and retail intelligence services to other businesses primarily in the U.S. market;

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•Equipment Manufacturing Products - Companies that manufacture and sell equipment used in commercial baking systems and food processing, as well as dredges, in both the U.S. and international markets; and

•Other Services - Companies that provide healthcare, leasing and investment services.

Markel Ventures businesses encounter a variety of competitors that vary by industry, end market and geographic area. Each Markel Ventures business has several main competitors and numerous smaller ones in most of its respective end markets and geographic areas. Many of the businesses in this segment experience revenue fluctuations over time due to the cyclical nature of supply and demand in their particular industry. For example, the construction industry is cyclical based on certain larger economic trends and factors, including the inflationary and interest rate environment and, for some businesses, the level of government investment. Additionally, many of our businesses experience fluctuation in demand throughout the year based on the seasonality of the products they sell or services they provide. For example, the demand for ornamental plants is particularly high during the spring and summer seasons as compared to the rest of the year. Businesses in this segment are reliant on inputs, such as raw materials and labor, to manufacture products and deliver services, and the operating results of these businesses could be impacted by the ability or inability to source these inputs and obtain price increases from customers in response to increases in the price of these inputs, including the cost of shipping. For example, shipping costs at some of our businesses increased significantly in 2021 and 2022, which has resulted in smaller margins as we have been unable to pass all of these cost increases through to our customers in certain instances. Management teams for each of our businesses proactively manage the risks and challenges posed by cyclicality, seasonality and inflation, among other things, in a variety of ways as appropriate and as needed for their business.

Regulatory Environment

We are subject to extensive state, federal and international regulation and supervision in the jurisdictions in which we do business. Regulations vary from jurisdiction to jurisdiction. Additionally, as a company with publicly-traded securities, we are also subject to certain legal and regulatory requirements applicable generally to public companies, including the rules and regulations of the U.S. Securities and Exchange Commission (SEC) and the New York Stock Exchange relating to reporting and disclosure, accounting and financial reporting, corporate governance and other matters.

The following is a summary of significant regulations that apply to our businesses, but it is not intended to be a comprehensive review of every regulation to which we are subject. For information regarding certain risks associated with regulations applicable to us, see Item 1A Risk Factors.

U.S. Insurance Regulation

State Regulation

Overview. Our U.S. insurance company subsidiaries are subject to varying degrees of regulation and supervision by the states and other jurisdictions in which they do business. In the U.S., authority for the regulation, supervision and administration of the business of insurance in each state is generally delegated to a state insurance commissioner who oversees a regulatory body responsible for the supervision of the business of insurance. State regulatory authorities have broad regulatory, supervisory and administrative powers relating to: solvency standards; corporate conduct; market conduct activities; regulating unfair trade and claims practices; licensing of insurers; licensing and appointment of agents; approval of forms and policies used; the nature of, and limitations on, insurers' investments; the form and content of annual statements and other reports on the financial condition of insurers; and establishment of loss reserves. States also regulate various aspects of the contractual relationships between insurers and independent agents. In addition, the National Association of Insurance Commissioners (NAIC), comprised of the insurance commissioners of each U.S. jurisdiction, develops or amends model statutes and regulations that, in turn, most states adopt.

Group Supervision - Global Supervisory College; Global Common Framework. Regulators within and outside the U.S. are increasingly coordinating the regulation of multinational insurers by conducting a supervisory college. A supervisory college is a forum of the regulators having jurisdictional authority over an insurance holding company's worldwide insurance subsidiaries. The supervisory college meets with executive management to evaluate the insurance group on both a group-wide and legal-entity basis, particularly with respect to its financial data, business strategies, enterprise risk management and corporate governance. The Illinois Department of Insurance is our lead insurance regulator for purposes of conducting our supervisory college.

In 2020, the International Association of Insurance Supervisors adopted its Common Framework for the Supervision of Internationally Active Insurance Groups (ComFrame). ComFrame establishes a comprehensive framework for supervisors to

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address group-wide activities and risks of internationally active insurance groups (IAIGs) and lays the groundwork for better supervisory cooperation and coordination. ComFrame requires the designation of a group-wide supervisor (regulator) for each IAIG and imposes a group capital requirement that will be applied to an IAIG in addition to the current legal entity capital requirements imposed by state and international insurance regulators. In response to ComFrame, the NAIC revised the model Insurance Holding Company System Regulatory Act to allow state insurance regulators in the U.S. to be designated as group-wide supervisors for U.S. based IAIGs.

Holding Company Statutes. In addition to regulatory supervision of our U.S. insurance subsidiaries, we are subject to state statutes governing insurance holding company systems. Typically, those statutes require that we periodically file information with the appropriate state insurance commissioner, including information concerning our capital structure, ownership, financial condition, dividend payments and other material transactions with affiliates, and general business operations. These statutes also require approval of changes in control of an insurer or an insurance holding company. Generally, "control" for these purposes is defined as ownership or voting power of 10% or more of a company's voting shares. Additional requirements include group-level reporting, submission of an annual enterprise risk report by a regulated insurance company's ultimate controlling person and providing information regarding an insurer's non-insurer affiliates.

Risk Based Capital Requirements. The NAIC uses a risk based capital (RBC) formula that is designed to measure the capital of an insurer taking into account the company's investments and products. RBC requirements provide a formula which, for property and casualty insurance companies, establishes capital thresholds for four categories of risk: asset risk, insurance risk, interest rate risk and business risk.

Financial Exams. State insurance regulators also prescribe the form and content of statutory financial statements, perform periodic financial examinations of insurers, set minimum reserve and loss ratio requirements, establish standards for permissible types and amounts of investments and require minimum capital and surplus levels. These statutory capital and surplus requirements include RBC rules promulgated by the NAIC.

Statutory Accounting Principles. Each of our U.S. insurance company subsidiaries is required to file detailed quarterly and annual reports, including financial statements, in accordance with prescribed statutory accounting rules, with regulatory officials in the jurisdictions in which they conduct business. The quarterly and annual financial reports filed with the states utilize statutory accounting principles (SAP) that are different from U.S. GAAP. In developing SAP, insurance regulators were primarily concerned with monitoring the solvency of insurance companies to assure an insurer's ability to pay all its current and future obligations to policyholders.

Own Risk and Solvency Assessment and Enterprise Risk Management. We must submit an Own Risk and Solvency Assessment Summary Report (ORSA) annually to our lead insurance regulator. The ORSA is a confidential internal assessment of the material and relevant risks associated with an insurer's current business plan and the sufficiency of capital resources to support those risks. In addition, we must file an annual enterprise risk report with our lead insurance regulator. The report must identify the material risks within the insurance holding company system that could pose enterprise risk to the U.S. insurance subsidiaries.

Rates and Form Filings. The policy forms and various premium rates of our U.S. admitted insurance subsidiaries are subject to regulation in every state in which they conduct business. In many states, rates and policy forms must be filed with the applicable insurance regulator prior to their use, and in some states, rates and forms must be affirmatively approved by the applicable insurance regulator prior to use.

Dividends. The laws of the domicile states of our U.S. insurance subsidiaries govern the amount of dividends that may be paid to our holding company, Markel Corporation. Generally, statutes in the domicile states of our insurance subsidiaries require prior approval for payment of extraordinary, as opposed to ordinary, dividends. See note 22 of the notes to consolidated financial statements included under Item 8.

Market Conduct. State insurance laws and regulations include numerous provisions governing trade practices and the marketplace activities of insurers, including provisions governing marketing and sales practices, data security, compliance of underwriting services to policyholders, confirmation of licensing and appointment of producers, claims management, anti-fraud controls and complaint handling. State regulatory authorities generally enforce these provisions through periodic market conduct examinations.

Investment Regulation. Investments by our U.S. insurance companies must comply with applicable laws and regulations that prescribe the kind, quality and concentration of investments. In general, these laws and regulations permit investments in

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federal, state and municipal obligations, corporate bonds, preferred and common equity securities, mortgage loans, real estate and certain other investments, subject to specified limits and certain other qualifications.

Federal Regulation

The U.S. federal government and its regulatory agencies generally do not directly regulate the business of insurance. However, two federal government bodies, the Federal Insurance Office (FIO) and the Financial Stability Oversight Council (FSOC), each created under The Dodd Frank Wall Street Reform and Consumer Protection Act, may impact the regulation of insurance. Although the FIO is prohibited from directly regulating the business of insurance, it has authority to represent the U.S. in international insurance matters and has limited powers to preempt certain types of state insurance laws. The FIO also can recommend to the FSOC that it designate an insurer as an entity posing risks to the U.S. financial stability in the event of the insurer's material financial distress or failure. We have not been so designated. The U.S. federal laws that most affect our day-to-day insurance operations are: the Gramm-Leach-Bliley Act; the Fair Credit Reporting Act; the Health Insurance Portability and Accountability Act of 1996, as amended; the Terrorism Risk Insurance Act of 2002, as amended; anti-money laundering laws and regulations; the Nonadmitted and Reinsurance Reform Act of 2010, as amended; the Foreign Corrupt Practices Act, and the rules and regulations of the Office of Foreign Assets Control.

International Insurance Regulation

Overview. Our international insurance operations are subject to regulation and supervision in various jurisdictions. These regulations, which vary depending on the jurisdiction, include, among others, solvency and market conduct regulations; anti-corruption, anti-money laundering, and anti-terrorism financing guidelines, laws and regulations; various privacy, insurance, tax, tariff, trade and sanctions laws and regulations; and corporate, competition, employment, intellectual property and investment laws and regulations. Outside of the U.S., we have insurance operations domiciled in the U.K., Europe and Bermuda, which are subject to regulation in those jurisdictions. In addition, we conduct business in Canada, Asia and the Middle East, where our businesses also are supervised by local regulatory authorities.

U.K. and European Regulation. We are subject to regulation by the Prudential Regulatory Authority and Financial Conduct Authority in respect of our U.K. insurance businesses. We are also subject to regulation by the Federal Financial Supervisory Authority, better known by its abbreviation BaFin, in respect of our German insurance carrier.

Our U.K. and German insurance businesses are subject to both the E.U.'s General Data Protection Regulation (GDPR) and the Solvency II Directive (Solvency II).

GDPR requires businesses operating in the E.U., and businesses transacting with E.U. citizens, to comply with conditions for processing personal data. Following the U.K.'s exit from the E.U., GDPR was transposed into U.K. law. The E.U. has granted adequacy status to the U.K.'s data protection laws, valid until June 2025 with the possibility of renewal, meaning that they are deemed essentially equivalent to E.U. data protection laws.

Solvency II requires our U.K. and German businesses to maintain certain capital standards and publish risk-related information in the form of a Solvency and Financial Condition Report. Following the U.K.'s exit from the E.U., Solvency II also was transposed into U.K. law as retained law. The U.K. government, under the Financial Services and Markets Bill, plans to repeal certain retained law with an approach to regulation designed for the U.K., including reforms to Solvency II.

Bermuda Regulation. The insurance industry in Bermuda is regulated by the Bermuda Monetary Authority (BMA). Under the Bermuda Insurance Act 1978, and related regulations and standards of the BMA, each Bermuda insurance company is subject to, among other things: licensing, capital, surplus and liquidity requirements; solvency standards; restrictions on dividends and distributions; and periodic examinations of the company and its financial condition. In addition, each insurance company must obtain prior approval of ownership and transfer of shares and maintain a principal office and appoint and maintain a principal representative in Bermuda. The BMA also requires that each insurance company contract for local services, such as corporate secretary, insurance manager and registered representative services, at market rates.

ILS Regulation

Our insurance-linked securities operations are subject to regulation and supervision by various regulatory authorities, both in the U.S. and internationally. Certain of our ILS subsidiaries are organized and regulated as follows:

•registered with the SEC as an investment adviser under the Investment Advisers Act of 1940, as amended,

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•registered with the U.S. Commodity Futures Trading Commission as a commodity pool operator or a commodity trading advisor under the Commodity Exchange Act, as amended,

•registered with the BMA as an insurance manager under the Bermuda Insurance Act 1978, and/or

•registered with the BMA as an investment manager under the Bermuda Investments Business Act 2003.

Certain other ILS subsidiaries serve as the investment manager to one or more private funds that are registered with the BMA under the Investment Funds Act 2006, as amended, or the Segregated Accounts Companies Act 2000, as amended. In addition, these operations include business relationships with certain U.S., U.K. and Bermuda insurance companies that are subject to U.S. and international insurance regulation as previously described in this "Regulatory Environment" section.

As a result, subsidiaries involved in our ILS operations are subject to regulations that may impose substantive and material restrictions and requirements on their operations, including, among other things: a broader fiduciary duty to act in the best interests of their clients; disclosure of information about our businesses and conflicts of interests to clients; maintenance of written policies and procedures; maintenance of extensive books and records; restrictions on the types of fees we may charge, including performance fees; restrictions on solicitation arrangements; requirements regarding engaging in transactions with clients; maintenance of an effective compliance program; and other restrictions and requirements applicable to custody of client assets, client privacy, advertising, pay-to-play prohibitions and cybersecurity; as well as possible sanctions, disciplinary actions or other penalties for non-compliance.

Markel Ventures Regulation

Our Markel Ventures businesses are subject to a wide variety of U.S. federal, state, and local laws and regulations, as well as international laws and regulations applicable to their international operations. Specifically, the most significant of these laws and regulations cover the following areas: safety, health, employment, the environment, transportation, U.S. and international trade, anti-corruption, data privacy and security and government contracts.

Human Capital

Our culture is our greatest asset and is defined by the Markel Style. Written in 1986, in preparation for our initial public offering, the Markel Style memorialized how we seek to operate our businesses and treat one another. It continues to provide our guiding principles across our diverse group of businesses. Key within the Markel Style is the encouragement to look for a better way to do things, to challenge management. We also seek spontaneity and flexibility and a respect for authority, but disdain for bureaucracy. Our diverse financial holding company is managed in a way to accomplish these principles. Each of our businesses operates with a high degree of autonomy so long as they operate within the principles of the Markel Style. This allows our managers to make decisions that are best for their employees and customers, as well as our shareholders. We believe this high degree of empowerment leads to the satisfaction that comes from being trusted in the responsibilities one has been given.

Further outlined in the Markel Style is our creed of honesty and fairness in all our dealings; holding the individual's right to self-determination in the highest light; putting aside individual concerns in the spirit of teamwork; and providing an atmosphere in which people can reach their full potential. We greatly value our employees, encourage their career development and reward their pursuit of excellence, while also celebrating a diverse workforce.

At December 31, 2022, we had approximately 20,900 employees, of whom approximately 5,000 were employed within our insurance operations and approximately 15,900 were employed within our Markel Ventures operations.

Insurance

Our principal business markets and underwrites specialty insurance products and within that business exists a well-developed process to ensure effective performance management, including an embedded annual and mid-year review process that enables goal setting, development planning and performance assessment. Within our insurance operations, we also have undertaken significant work over recent years to establish global leadership development programs for different levels of leadership at Markel, including partnering with various renowned business schools to create leading-edge curriculum in this area.

With the Markel Style as our foundation, we have identified five pillars of focus that relate to today's challenges and opportunities—diversity and inclusion, community, innovation, well-being, and recognition. This program is both company and employee led—collectively, we want to bring the values of the Markel Style to life with our actions, not just our words. Our intent is to create an environment where employees are able to authentically bring their true selves to work, a place where

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all ideas are heard and diverse perspectives are valued, a culture that prioritizes innovation, the ability to make a difference for our local communities and the wider world, and a foundation for holding ourselves accountable for our own well-being and of those around us.

Employee health and overall well-being is a key priority, and we provide a range of employee and eligible partner plans and programs, including health and voluntary benefits. These offerings include a variety of financial protection programs to help our employees meet their unique investment and savings needs including life insurance, retirement savings with company contributions in most situations and an employee stock purchase plan. Comprehensive employee assistance programs are available in all of our major markets along with other well-being and fitness resources.

We rely on our employees' ideas and input to help make Markel a great place to work. For example, senior leadership conducts regular employee communication meetings, inclusive of question and answer sessions, across our insurance operations providing opportunities for employees to share their ideas on how we can improve employee engagement. In addition, every two years we conduct a major, global employee engagement survey, which in early 2022 garnered 88% participation, and which enables us to identify, focus on and track progress against key engagement drivers and external norms for high performing companies. This survey has generated additional ideas for employee engagement; and we have made meaningful changes and improvements in our human capital practices based on this feedback.

We are committed to embracing all aspects of diversity, including diversity of perspective, which we believe is crucial to sustainable success. Markel accordingly supports and encourages focused efforts to continue to build the diversity of our employee population and the inclusiveness of our culture. Our diversity and inclusion efforts seek to cultivate an inclusive environment in which every employee feels valued, respected and accepted. We believe this environment helps us increase creativity and innovation, foster business connections, serve our customers and maintain our market leadership.

Within our insurance business, our global Diversity and Inclusion (D&I) Steering Committee comprises more than 15 senior managers who are charged with advising on D&I strategy and providing leadership support and advocacy for our D&I efforts. Our Human Resources leadership team works to further shape the D&I strategy for our global workforce, and to ensure the integration of our D&I efforts with our global talent acquisition and development processes. We have various early career programs open to a diverse range of applicants and a regional scholarship program that is focused on underrepresented groups.

Our insurance operations support a range of employee-led D&I networks and resource groups, including our Markel Women's Network, BEAM (Black Engagement at Markel), PRISM (LGBTQ+), Jitneys (Young Professionals), Markel Asian Professionals Network, Markel Veterans Network, UN1DOS (Latin and Hispanic Network), and across our international operations, an Inclusion Network with connections to a number of the London market partner networks. All of these networks and organizations have put in place goals and programming that are focused on education and development, community engagement, talent acquisition and networking/support. Additionally, we continue our global sponsorship of Dive-In, the insurance industry's annual diversity and inclusion festival.

Markel Ventures

Our Markel Ventures operations are comprised of a diverse portfolio of businesses from different industries through which we own controlling interests. The Markel Ventures operations are viewed by management as separate and distinct from our insurance operations with local management teams that direct the strategy and day-to-day operations of their respective companies, including human capital matters. When making these acquisitions, we seek, among other things, businesses whose leadership teams demonstrate equal measures of both integrity and talent. As a result, each Markel Ventures business fosters a culture within their operations, and with their employees, that aligns with the principles of the Markel Style.

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Item 1A. RISK FACTORS

A wide range of factors could materially affect our future prospects and performance. The matters addressed in Item 7 Management's Discussion and Analysis of Financial Condition and Results of Operations, including under "Safe Harbor and Cautionary Statement" and "Critical Accounting Estimates", and Item 7A Quantitative and Qualitative Disclosures About Market Risk, as well as other information included or incorporated in this report, describe many of the significant risks that could affect our businesses, results of operations and financial condition. We are also subject to the risks discussed below.

One or more of the risks discussed in this Item 1A. Risk Factors, and others we cannot anticipate, could have material adverse effects on our results of operations and financial condition; and the extent of these effects will depend, at least in part, on the scope, severity, frequency or duration of the specific event or circumstance. In addition, we may take steps to prevent, mitigate or manage potential risks or liabilities, and related developments, and some of those steps may have a material adverse effect on our results of operations and financial condition. Even if an unfavorable outcome does not materialize, these factors, and actions we may take in response, may have a material adverse impact on our reputation or result in substantial expense and disruption.

Headings and sub-headings for the Risk Factors below are for reference purposes only and are not intended to limit or affect in any way the meaning or scope of each Risk Factor.

Risks Primarily Related to Our Insurance Operations

Loss Exposures

We may experience losses or disruptions from catastrophes. As a company with significant property and casualty insurance underwriting operations, we may experience losses from man-made or natural catastrophes. Catastrophes include, but are not limited to, windstorms, hurricanes, earthquakes, tornadoes, derechos, hail, severe winter weather and wildfires and may include pandemics and events related to terrorism, broad reaching cyberattacks, riots and political and civil unrest. While we employ catastrophe modeling tools in our underwriting process, we cannot predict how severe a potential catastrophe will be before it occurs. The extent of losses from catastrophes is a function of the total amount of losses incurred, the number of insureds affected, the frequency and severity of the events, the effectiveness of our catastrophe risk management program and the adequacy of our reinsurance coverage. Most catastrophes occur over a small geographic area; however, some catastrophes may produce significant damage in large, heavily populated areas. In addition, catastrophes may have a material adverse effect on the investment management and incentive fees earned by our insurance-linked securities (ILS) operations and returns on our investments in ILS funds. Catastrophes also may result in significant disruptions in our insurance and other operations, as well as loss of income and assets. If climate change results in an increase in the frequency and/or severity of weather-related catastrophes, we may experience additional or elevated catastrophe-related losses or disruptions, which may be material.

The failure of any of the methods we employ to manage our loss exposures could have a material adverse effect on us. We seek to manage our loss exposures in a variety of ways, including adhering to maximum limitations on policies written in defined geographical zones, limiting program size for each client, establishing per risk and per occurrence limitations for each event, employing coverage restrictions and following prudent underwriting guidelines for each program written. We also seek to manage our loss exposures through geographic and industry diversification. Underwriting is a matter of judgment, involving assumptions about matters that are inherently unpredictable and beyond our control, and for which historical experience and probability analysis may not provide sufficient guidance. One or more future events could result in claims that substantially exceed our expectations, which could have a material adverse effect on our results of operations and financial condition. In addition, we seek to manage our loss exposures by policy terms, coverage exclusions and choice of legal forum. Disputes relating to coverage and choice of legal forum also arise. As a result, various provisions of our policies, such as choice of forum, or coverage limitations or exclusions, may not be enforceable in the manner we intend and some or all of our methods to manage loss exposures may prove ineffective.

The effects of emerging claim and coverage issues on our business are uncertain. As industry practices and legal, judicial, social and other environmental conditions change, unexpected and unintended issues related to claims and coverage may emerge. These issues could have a material adverse effect on our results of operations or financial condition by either broadening coverage beyond our underwriting intent or increasing the frequency and/or severity of claims. For example, rising costs, litigation funding, social inflation, higher adverse verdicts, and legislative changes, such as extended statutes of limitations, may result in higher and more frequent claims over a longer reporting period than originally expected. In some instances, these changes may not become apparent until after we have issued insurance or reinsurance contracts that are

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affected by the changes. As a result, the full extent of liability under our insurance or reinsurance contracts may not be known for many years after a contract is issued.

We use analytical models to assist our decision making in key areas such as pricing, reserving and capital modeling and actual results may differ materially from the model outputs and related analyses. We use various modeling techniques and data analytics (e.g., scenarios, predictive and stochastic modeling, and forecasting) to analyze and estimate exposures, loss trends and other risks associated with our insurance and ILS businesses. This includes both proprietary and third-party modeled outputs and related analyses to assist us in, among other things, decision-making related to underwriting, pricing, capital allocation, reserving, investing, reinsurance and catastrophe risk. We incorporate numerous assumptions and forecasts about the future level and variability of policyholder behavior, loss frequency and severity, interest rates, equity markets, inflation, capital requirements, and currency exchange rates, among others. The modeled outputs and related analyses from both proprietary models and third-party models are subject to various assumptions, uncertainties, model design errors, complexities and the inherent limitations of any statistical analysis, including those arising from the use of historical internal and industry data and assumptions.

In addition, the modeled outputs and related analyses may from time to time contain inaccuracies, perhaps in material respects, including as a result of inaccurate inputs or applications thereof (whether due to data error, human error or otherwise). Consequently, actual results may differ materially from our modeled results. Our profitability and financial condition substantially depend on the extent to which our actual experience is consistent with assumptions we use in our models and ultimate model outputs. If, based upon these models or other factors, we misprice our products or fail to appropriately estimate the risks we are exposed to, our business, results of operations and financial condition may be materially adversely affected.

Loss Reserves

Our results may be affected because actual insured or reinsured losses differ from our loss reserves. Significant periods of time often elapse between the occurrence of an insured or reinsured loss, the reporting of the loss to us and our payment of that loss. To recognize liabilities for unpaid losses, we establish reserves as balance sheet liabilities representing estimates of amounts needed to pay reported and unreported losses and the related loss adjustment expenses. The process of estimating loss reserves is a difficult and complex exercise involving many variables and subjective judgments. This process may also become more difficult if we experience a period of rising inflation, as has been the case since early 2021.

As part of the reserving process, we review historical data and consider the impact of various factors, such as:

•trends in claim frequency and severity;

•changes in operations;

•changes to mix of business, terms and conditions, limits and layers;

•emerging economic and social trends;

•trends in insurance rates;

•inflation or deflation; and

•changes in the regulatory and litigation environments.

This process assumes that past experience, adjusted for the effects of current developments and anticipated trends, is an appropriate basis for predicting future events. There is no precise method, however, for evaluating the impact of any specific factor on the adequacy of reserves, and actual results will differ from original estimates. As part of the reserving process, we regularly review our loss reserves and make adjustments as necessary. Future increases in loss reserves for our underwriting operations will, and for our programs services operations may, result in additional charges to earnings, which may be material.

In addition, as discussed above, we use analytical models to assist our decision making in loss reserving, and actual results may differ materially from the model outputs and related analyses.

There is generally greater uncertainty in estimating reserves for long-tail coverages, such as general liability, professional liability and workers' compensation, as they require a longer period of time for claims to be reported and settled. The impact of changes in economic and social inflation and medical costs are also more pronounced for long-tail coverages due to the longer settlement period. In addition, reinsurance reserves are subject to greater uncertainty than insurance reserves primarily because a reinsurer relies on (i) the original underwriting decisions and claims decisions made by ceding companies and (ii) information and data from ceding companies. As a result, we are subject to the risk that our ceding companies may not have adequately evaluated the risks reinsured by us and the premiums ceded may not adequately compensate us for the risks we

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assume. In addition, reinsurance reserves may be less reliable than insurance reserves because there is generally a longer lapse of time from the occurrence of the event to the reporting of the loss or benefit to the reinsurer and ultimate resolution or settlement of the loss. Reserves for contracts for which we are not the primary insurer, and participate only in excess layers of loss, are also subject to greater uncertainty than insurance reserves for contracts for which we are the primary insurer for many of the same reasons as reinsurance reserves.

Changes in the assumptions and estimates used in establishing reserves for our life and annuity reinsurance book could result in material increases in our estimated loss reserves for such business. Our run-off life and annuity reinsurance book exposes us to mortality risk, which is the risk that the level of death claims may differ from that which we assumed in establishing the reserves for our life and annuity reinsurance contracts. Some of our life and annuity reinsurance contracts expose us to longevity risk, which is the risk that an insured person will live longer than expected when the reserves were established, or morbidity risk, which is the risk that an insured person will become critically ill or disabled. Our reserving process for the life and annuity reinsurance book is designed with the objective of establishing appropriate reserves for the risks we assumed. Among other things, this process relies heavily on analysis of mortality, longevity and morbidity trends, lapse rates, interest rates and expenses. As of December 31, 2022, our reserves for life and annuity benefits totaled $759.0 million.

We expect mortality, morbidity, longevity, and lapse experience to fluctuate somewhat from period to period, but believe they should remain reasonably predictable over a period of many years. Mortality, longevity, morbidity or lapse experience that is less favorable than the mortality, longevity, morbidity or lapse rates that we used in establishing the reserves for a reinsurance agreement will negatively affect our net income because the reserves we originally set for the risks we assumed may not be sufficient to cover the future claims and expense payments. Furthermore, even if the total benefits paid over the life of the contract do not exceed the expected amount, unexpected increases in the incidence of deaths or illness can result in changes to our assumptions in a given reporting period, adversely affecting our net income in any particular reporting period. If there are changes to any of the above factors to the point where a reserve deficiency exists, a charge to earnings will be recorded, which may have a material adverse effect on our results of operations and financial condition.

Ceded Reinsurance

We may be unable to purchase reinsurance protection on terms acceptable to us, or we may be unable to collect on loss recoveries from reinsurers. Our underwriting operations purchase reinsurance and retrocessional reinsurance to manage our net retention on individual risks and mitigate the volatility of losses on our results of operations and financial condition, while providing us with the ability to offer policies with sufficient limits to meet policyholder needs. In addition, we reinsure substantially all of the risks inherent in our program services business, however, we have certain programs that contain limits on our reinsurers' obligations to us that expose us to underwriting risk, including loss ratio caps, aggregate reinsurance limits or exclusion of the credit risk of producers. See note 12 of the notes to consolidated financial statements included under Item 8 for information about ceded reinsurance for our program services businesses.

The ceding of insurance does not legally discharge us from our primary liability for the full amount of the policies. Reliance on reinsurance recoveries may create credit risk as a result of the reinsurer's inability or unwillingness to pay reinsurance claims when due. We generally select well capitalized and highly rated reinsurers and in certain instances we require reinsurers to post substantial collateral to secure the reinsured risks. Deterioration in the credit quality of existing reinsurers or disputes over the terms of reinsurance could result in charges to earnings, which may have a material adverse effect on our results of operations and financial condition. In addition, collateral may not be sufficient to cover the reinsurer's obligation to us, and we may not be able to cause the reinsurer to deliver additional collateral.

As of December 31, 2022, we were the beneficiary of letters of credit, trust accounts and funds withheld in the aggregate amount of $5.0 billion, collateralizing $8.4 billion in reinsurance recoverables. The remaining unsecured reinsurance recoverables are ceded to highly-rated, well capitalized reinsurers. Our reinsurance recoverables are based on estimates, and our actual liabilities may exceed the amount we are able to recover from our reinsurers or any collateral securing the reinsurance recoverables. The failure of a reinsurer to meet its obligations to us, whether due to insolvency, dispute or other unwillingness or inability to pay, or due to our inability to access sufficient collateral to cover our liabilities, could have a material adverse effect on our results of operations and financial condition.

The availability and cost of reinsurance are determined by market conditions beyond our control. There is no guarantee that our desired amounts of reinsurance or retrocessional reinsurance will be available in the marketplace in the future. In addition, available capacity may not be on terms we deem appropriate or acceptable or with companies with whom we want to do

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business. This could impact our ability to write certain products and have a material adverse effect on our results of operations and financial condition.

Market Competition and Broker Reliance

Competition in the insurance and reinsurance markets could reduce profits from our insurance operations. Insurance and reinsurance markets are highly competitive. We compete on an international and regional basis with major United States (U.S.), Bermuda, United Kingdom (U.K.), European, and other international insurers and reinsurers and with underwriting syndicates, some of which have greater financial, marketing, and management resources than we do, have greater access to "big data," and may be able to offer a wider range of, or more sophisticated, commercial and personal lines products. Recent industry consolidation, including business combinations among insurance and other financial services companies, has resulted in larger competitors with even greater financial resources. In addition, capital market participants have created alternative products that are intended to compete with reinsurance products.

Similar to other industries, the insurance industry is undergoing rapid and significant technological and other changes. There is increasing focus by traditional insurance industry participants, technology companies, "InsurTech" start-up companies and others on using technology and innovation to simplify and improve the customer experience, increase efficiencies, redesign products, alter business models and effect other potentially disruptive changes in the insurance industry. If we do not anticipate, keep pace with and adapt to technological and other changes impacting the insurance industry, it will harm our ability to compete, decrease the value of our products to customers, and materially and adversely affect our business. Furthermore, innovation, technological change and changing customer preferences in the markets in which we operate also pose other risks to our businesses. For example, they could result in increasing our service, administrative, policy acquisition or general expenses as we seek to distinguish our products and services from those of our competitors or otherwise keep up with such innovation and changes.

Increased competition could result in fewer submissions, lower premium rates, and less favorable policy terms and conditions, which could reduce our underwriting profits, or within our program services operations, our operating profits, and have a material adverse effect on our results of operations and financial condition.

The historical cyclicality in the property and casualty insurance industry could have a material adverse effect on our ability to improve or maintain underwriting profits or to grow or maintain premium volume. The insurance and reinsurance markets have historically been cyclical, characterized by extended periods of intense price competition due to excessive underwriting capacity, and more recently alternative sources of capital, as well as brief periods when shortages of capacity permitted more favorable rate levels. Among our competitive strengths have been our specialty product focus and our niche market strategy. These strengths also make us vulnerable in periods of intense competition to actions by other insurance companies who seek to write additional premiums without appropriate regard for underwriting profitability. At times it could be very difficult for us to grow or maintain premium volume levels without sacrificing underwriting profits. If we are not successful in maintaining rates or achieving rate increases, it may be difficult for us to improve or maintain underwriting profits or to grow or maintain premium volume levels.

Our efforts to develop new products, expand in targeted markets or improve business processes and workflows may not be successful and may increase or create new risks. From time to time, to protect and grow market share or improve our efficiency, we invest in strategic initiatives to:

•develop products that insure risks we have not previously insured, include new coverages or change coverage terms;

•change commission terms;

•change our underwriting processes;

•improve business processes and workflow to increase efficiencies and productivity and to enhance the experience of our customers and producers;

•expand distribution channels; and

•enter geographic markets where we previously have had relatively little or no market share.

We may not be successful in these efforts, and even if we are successful, they may increase or create the following risks, among others:

•demand for new products or expansion into new markets may not meet our expectations;

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•new products and expansion into new markets may increase or change our risk exposures, and the data and models we use to manage those exposures may not be as effective as those we use in existing markets or with existing products;

•models underlying automated underwriting and pricing decisions may not be effective;

•efforts to develop new products or markets or to change commission terms may create or increase distribution channel conflicts;

•in connection with the conversion of existing policyholders to a new product, some policyholders' pricing may increase while the pricing for other policyholders may decrease, the net impact of which could negatively impact retention and profit margins; and

•changes to our business processes or workflow, including the use of new technologies, may give rise to execution risk.

These efforts may require us to make substantial expenditures, which may negatively impact results in the near term, and if not successful, could materially and adversely affect our results of operations.

We depend on a few brokers for a large portion of our revenues and the loss of business provided by any one of them could have a material adverse effect on us. We market our insurance and reinsurance worldwide through insurance and reinsurance brokers. For the year ended December 31, 2022, our top three independent brokers represented 28% of the gross premiums written by our underwriting operations. Loss of all or a substantial portion of the business provided by one or more of these brokers could have a material adverse effect on our business.

Financial Strength and Credit Ratings

Our insurance companies and senior debt are rated by various rating agencies, and a downgrade or potential downgrade in one or more of these ratings could have a material adverse effect on us. Financial strength ratings are an important factor in establishing the competitive position of insurance and reinsurance companies. Our senior debt ratings also affect the availability and cost of capital. Certain of our insurance and reinsurance company subsidiaries and our senior debt securities are rated by various rating agencies. Our financial strength and debt ratings are subject to periodic review, and are subject to revision or withdrawal at any time. The financial strength ratings of our insurance subsidiaries are significantly influenced by their statutory surplus amounts and leverage and capital adequacy ratios and other financial metrics. Rating agencies may implement changes to their ratings methodologies or internal models that have the effect of increasing or decreasing the amount of capital our insurance subsidiaries must hold or restrict how the company may deploy its capital in order to maintain its current ratings. For example, for certain of our insurance subsidiaries, rating agencies may take into account in their calculations the collateral provided to us by reinsurers. A change in this practice could adversely impact our ratings. We cannot be sure that we will be able to retain our current, or any future, ratings. If our ratings are reduced from their current levels by one or more rating agencies, our competitive position in our target markets within the insurance industry could suffer and it would be more difficult for us to market our products. A ratings downgrade could result in a substantial loss of business as policyholders and ceding company clients move to other companies with higher claims-paying and financial strength ratings. In addition, a downgrade could trigger contract provisions that allow cedents to terminate their reinsurance contracts on terms disadvantageous to us or require us to collateralize our obligations through trusts or letters of credit. A ratings downgrade could also have a material adverse effect on our liquidity, including the availability of our letter of credit facilities, and limit our access to capital markets, increase our cost of borrowing or issuing debt and require us to post collateral.

The amount of capital that our insurance subsidiaries have and must hold to maintain their financial strength and credit ratings and meet other requirements can vary significantly from time to time and is sensitive to a number of factors, some of which are outside of our control. Capital requirements for our insurance subsidiaries are prescribed by the applicable insurance regulators, while rating agencies establish requirements that inform ratings for our insurance subsidiaries and senior debt securities. Projecting surplus and the related capital requirements is complex and requires making assumptions regarding how our business will perform within the broader macroeconomic environment. Insurance regulators and rating agencies evaluate company capital through financial models that calculate minimum capitalization requirements based on risk-based capital formulas for property and casualty insurance groups and their subsidiaries. In any particular year, capital levels and risk-based capital requirements may increase or decrease depending on a variety of factors including the mix of business written by our insurance subsidiaries and correlation or diversification in the business profile, the amount of additional capital our insurance subsidiaries must hold to support business growth, the value of securities in our investment portfolio, changes in interest rates and foreign currency exchange rates, as well as changes to the regulatory and rating agency models used to determine our required capital.

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Insurance Regulation

Our insurance subsidiaries are subject to supervision and regulation that may have a material adverse effect on our operations and financial condition. Our insurance subsidiaries are subject to supervision and regulation by the regulatory authorities in the various jurisdictions in which they conduct business, including foreign and U.S. state insurance regulators. Regulatory authorities have broad regulatory, supervisory and administrative powers relating to, among other things, data protection and data privacy, cybersecurity, solvency standards, licensing, coverage requirements, product terms and conditions, policy rates and forms, business and claims practices, disclosures to consumers, and the form and content of financial reports. In some instances, we follow practices based on our interpretations of regulations or practices that we believe may be generally followed by the industry. These practices may turn out to be different from the interpretations of regulatory authorities. Insurance regulatory authorities have broad authority to initiate investigations or other proceedings, and, in connection with a failure to comply with applicable laws and regulations, could impose adverse consequences, including fines, penalties, injunctions, denial or revocation of an operating license or approval, increased scrutiny or oversight, limitations on engaging in a particular business, or redress to clients. These actions also could result in negative publicity, reputational damage or harm to client, employee or other relationships. Additionally, regulatory and legislative authorities continue to implement enhanced or new regulatory requirements to assure the stability of insurance companies or enhance policyholder protections or, in certain instances, intended to prevent or mitigate future financial crises. Regulatory authorities also may seek to exercise their supervisory or enforcement authority in new or more extensive ways, such as increased capital requirements. These actions, if they occur, could affect the competitive market, as well as the way we conduct our business or manage our capital, and could result in lower revenues and higher costs. As a result, such actions could have a material adverse effect on our results of operations and financial condition.

Regulators may challenge our use of fronting arrangements in states in which our capacity providers are not licensed. Our program services business enters into fronting arrangements with general agents and domestic and foreign insurers that want to access specific U.S. property and casualty insurance business in states in which the capacity providers are not licensed or are not authorized to write particular lines of insurance. Some state insurance regulators may object to these fronting arrangements. In certain states, an insurance commissioner has the authority to prohibit an authorized insurer from acting as an issuing carrier for an unauthorized insurer. In addition, insurance departments in states in which there is no such statutory or regulatory prohibition, could deem the assuming insurer to be transacting insurance business without a license and the issuing carrier to be aiding and abetting the unauthorized sale of insurance.

If regulators in any of the states where we conduct our fronting business were to prohibit or limit those arrangements, we would be prevented or limited from conducting that business for which a capacity provider is not authorized in those states, unless and until the capacity provider is able to obtain the necessary licenses. This could have a material adverse effect on our results of operations and financial condition.

Insurance-Linked Securities

Our ILS operations and our management of third-party capital may expose us to risks. Some of our operating subsidiaries may owe certain legal duties and obligations to third-party investors. A failure to fulfill any of those duties or obligations could result in significant liabilities, penalties or other losses, and harm our businesses and results of operations. In addition, third-party investors may decide not to renew their investments in the funds we manage, which could materially impact the financial condition of those funds, and could, in turn, have a material adverse effect on our results of operations and financial condition. Moreover, we may not be able to maintain or raise additional third-party capital for the funds we manage or for potential new funds and therefore we may forego existing or potential fee income and other income generating opportunities. For example, investment performance at Nephila, as well as the broader ILS market, has been adversely impacted by consecutive years of elevated catastrophe losses, as well as by the COVID-19 pandemic in 2020. These events, as well as volatility in the capital markets, also have impacted investor decisions around allocation of capital to ILS, which in turn have impacted, and may continue to impact, our capital raises and redemptions within the funds we manage, as well as new funds, resulting in a decline in assets under management. See "Critical Accounting Estimates - Goodwill and Intangible Assets" under Item 7. Management's Discussion & Analysis of Financial Condition and Results of Operations for discussion and considerations of these impacts on the valuation of goodwill and intangible assets attributed to our Nephila ILS operations.

Developments at our Markel CATCo operations could have a material adverse effect on us. In December 2018, the U.S. Department of Justice (DOJ), U.S. Securities and Exchange Commission (SEC) and Bermuda Monetary Authority (BMA) initiated inquiries into loss reserves recorded in late 2017 and early 2018 at Markel CATCo Re Ltd. (the Markel CATCo Inquiries). In September 2021, each of the SEC and DOJ notified us that it had concluded its investigation and does not intend

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to take any action against Markel CATCo Investment Management Ltd. There are currently no pending requests from the BMA, and it has been over two years since the BMA has contacted the Company in relation to the Markel CATCo Inquiries.

Matters related to or arising from our Markel CATCo operations, including matters of which we are currently unaware, could result in additional claims, litigation, investigations, enforcement actions or proceedings. For example, while prior litigation was dismissed or settled, additional litigation may be filed by investors in the Markel CATCo Funds. We also could become subject to increased regulatory scrutiny, investigations or proceedings in any of the jurisdictions where we operate. If any regulatory authority takes action against us or we enter into an agreement to settle a matter, we may incur sanctions or be required to pay substantial fines or implement remedial measures that could prove costly or disruptive to our businesses and operations. An unfavorable outcome in one or more of these matters, and others we cannot anticipate, could have a material adverse effect on our results of operations and financial condition. Even if an unfavorable outcome does not materialize, these matters, and actions we may take in response, could have an adverse impact on our reputation, limit our access to capital markets and result in substantial expense and disruption.

In addition, we may take steps to mitigate potential risks or liabilities related to or arising from our Markel CATCo operations. For example, see note 21 of the notes to consolidated financial statements included under Item 8 for information regarding a buy-out transaction that accelerated a full return of remaining capital to investors in the Markel CATCo Funds, which are currently in run-off. Other steps we may take to mitigate potential risks or liabilities related to or arising from our Markel CATCo operations could have a material impact on our results of operations or financial condition.

Risks Primarily Related to Our Investments and Access to Capital

Changes in Economic Conditions

Our investment results may be impacted by changes in interest rates, U.S. and international monetary and fiscal policies as well as broader economic conditions. We receive premiums from customers for insuring their risks. We invest these funds until they are needed to pay policyholder claims. Fluctuations in the value of our investment portfolio can occur as a result of changes in interest rates and U.S. and international fiscal, monetary and trade policies as well as broader economic conditions (including, for example, equity market conditions and significant or prolonged inflation or deflation). Although we attempt to take measures to manage the risks of investing in these changing environments, we may not be able to mitigate our sensitivity to them effectively. Despite our mitigation efforts, which include duration and currency targets for asset portfolios, compliance monitoring of these targets and means to reasonably and effectively match asset duration and currency to the duration and currency of the loss reserves, changes in interest rates and U.S. and international fiscal, monetary and trade policies as well as broader economic conditions could have a material adverse effect on our investment results and, consequently, our results of operations and financial condition.

We invest a significant portion of our shareholders' equity in equity securities, which may result in significant variability in our investment results and net income and may have a material adverse effect on shareholders' equity. Additionally, our equity investment portfolio is concentrated, and declines in the value of these significant investments could have a material adverse effect on our financial results and on our ability to carry out our business plans. Equity securities were 59% and 61% of our shareholders' equity at December 31, 2022 and 2021, respectively. Equity securities have historically produced higher returns than fixed maturity securities over long periods of time; however, investing in equity securities may result in significant variability in investment returns from one period to the next. In volatile financial markets, we could experience significant declines in the fair value of our equity investment portfolio, which would result in a material decrease in net income and shareholders' equity. Our equity portfolio is concentrated in particular issuers and industries and, as a result, a decline in the fair value of these concentrated investments also could result in a material decrease in net income and shareholders' equity. A material decrease in shareholders' equity may have a material adverse effect on our ability to carry out our business plans.

Access to Capital

We may require additional capital in the future, which may not be available or may only be available on unfavorable terms. To the extent that cash flows generated by our operations are insufficient to fund future operating requirements, or that our capital position is adversely impacted by a decline in the fair value of our investment portfolio, losses from catastrophe events or otherwise, we may need to raise additional funds through financings or curtail our growth. We also may be required to liquidate fixed maturity securities or equity securities, which may result in realized investment losses. Any further sources of capital, including capacity needed for letters of credit, if available at all, may be on terms that are unfavorable to us. Our access to additional sources of capital will depend on a variety of factors, such as market conditions, the general availability of

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credit, the availability of credit to the industries in which we operate, our results of operations, financial condition, credit ratings and credit capacity, as well as pending litigation or regulatory investigations. Our ability to borrow under our revolving credit facility and letter of credit facilities is contingent on our compliance with the covenants and other requirements under those facilities. Similarly, our access to capital may be impaired if regulatory authorities or rating agencies take negative actions against us. Our inability to obtain adequate capital when needed could have a negative impact on our ability to invest in, or take advantage of opportunities to expand, our businesses, such as possible acquisitions or the creation of new ventures, and inhibit our ability to refinance our existing indebtedness on terms acceptable to us. Any of these effects could have a material adverse effect on our results of operations and financial condition.

Our failure to comply with covenants and other requirements under our credit facilities, senior debt and other indebtedness could have a material adverse effect on us. The agreements and indentures relating to our credit facilities, senior debt and other indebtedness, including letter of credit facilities used by certain of our subsidiaries, contain covenants and other requirements. If we fail to comply with those covenants or requirements, the lenders, noteholders or counterparties under those agreements and indentures could declare a default and demand immediate repayment of all amounts owed to them. In addition, where applicable, our lenders may cancel their commitments to lend or issue letters of credit or require us to pledge additional or a different type of collateral. A default under one debt agreement may also put us at risk of a cross-default under other debt agreements or other arrangements. Any of these effects could have a material adverse effect on our results of operations and financial condition.

Our liquidity and our ability to meet our debt and other obligations, and pay dividends on our preferred stock, depend on the receipt of funds from our subsidiaries. We are a holding company, and as a result, our cash flow and our ability to meet our debt and other obligations, and pay dividends on our preferred stock, depend upon the earnings of our subsidiaries and on the distribution of earnings, loans or other payments by our subsidiaries to us. The payment of dividends by our insurance subsidiaries, which account for a significant portion of our operating cash flows, may require prior regulatory notice or approval or may be restricted by capital requirements imposed by regulatory authorities. Similarly, our insurance subsidiaries may require capital contributions from us to satisfy their capital requirements. In addition, our reinsurance contracts typically allow the cedent, upon a reduction in an insurance company's capital in excess of specified amounts, to terminate its contract on terms disadvantageous to us or to exercise other remedies that may adversely affect us. Those contract provisions may have the effect of limiting distributions by our insurance subsidiaries to us.

Risks Related to All of Our Operations

Legal and Regulatory Risks

The legal and regulatory requirements applicable to our businesses are extensive. Failure to comply could have a material adverse effect on us. Each of our businesses is highly dependent on the ability to engage on a daily basis in a large number of financial and operational activities, including, among others, insurance underwriting, claim processing, investment activities, the management of third-party capital and providing products and services to businesses and consumers, many of which are highly complex. These activities are subject to internal guidelines and policies, as well as legal and regulatory requirements, including, among others, those related to privacy and data security, economic and trade sanctions, anti-corruption, anti-bribery and global finance and investments, customer protection and insurance matters. Our continued expansion into new businesses, distribution channels and markets brings about additional requirements. While we believe that we have adopted adequate and effective risk management and compliance programs, compliance risks remain, particularly as we become subject to additional rules and regulations. Failure to comply with, or to obtain, appropriate authorizations or exemptions under any applicable laws and regulations could result in restrictions on our ability to do business or undertake activities that are regulated in one or more of the jurisdictions in which we conduct business. Any such failure could also subject us to fines, penalties, equitable relief and changes to our business practices. In addition, a failure to comply could result in defaults under our senior unsecured debt agreements or credit facilities or damage our businesses or our reputation.

Compliance with applicable laws and regulations is time consuming and personnel- and systems-intensive. Shareholder activism, the current political environment, and the current high level of government intervention and regulatory reform may lead to substantial new regulations and compliance obligations. Any changes in, or the enactment of new, applicable laws and regulations may increase the complexity of the regulatory environment in which we operate, which could materially increase our direct and indirect compliance costs and other expenses of doing business, and have a material adverse effect on our results of operations and financial condition.

Losses from legal and regulatory actions may have a material adverse effect on us. From time to time we may be involved in various legal actions, including at times multi-party or class action litigation, some of which involve claims for substantial

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or indeterminate amounts. A significant unfavorable outcome in one or more of these actions could have a material adverse effect on our results of operations and financial condition. We are also involved from time to time in various regulatory actions, investigations and inquiries, including market conduct exams by insurance regulatory authorities. If a regulatory authority takes action against us or we enter into a consent order or agreement to settle a matter, a regulatory authority has the option to require us to pay substantial fines or implement remedial measures that could prove costly or disruptive to our businesses and operations. Even if an unfavorable outcome does not materialize, these matters could have an adverse impact on our reputation and result in substantial expense and disruption. See note 21 of the notes to consolidated financial statements included under Item 8 and Item 3 Legal Proceedings.

We are subject to laws and regulations relating to economic and trade sanctions and bribery and corruption, the violation of which could have a material adverse effect on us. We are required to comply with the economic and trade sanctions and embargo programs administered by the U.S. Department of the Treasury's Office of Foreign Assets Control and similar multi-national bodies and governmental agencies worldwide, as well as applicable anti-corruption laws and anti-bribery and regulations of the U.S. and other jurisdictions where we operate. In some cases we must comply with a large number of new economic, financial and trade sanctions that are imposed over a short period of time, as occurred with the Russia-Ukraine conflict. A violation of a sanction, embargo program, or anti-corruption law, could subject us, and individual employees, to a regulatory enforcement action as well as significant civil and criminal penalties. In addition, a violation could result in defaults under our outstanding indebtedness or credit facilities or damage our businesses or our reputation. Those penalties or defaults, or damage to our businesses or reputation, could have a material adverse effect on our results of operations and financial condition. In some cases the requirements and limitations applicable to the global operations of U.S. companies and their affiliates are more restrictive than, and may even conflict with, those applicable to non-U.S. companies and their affiliates, which also could have a material adverse effect on our results of operations and financial condition.

Employee error and misconduct may be difficult to detect and prevent and may result in significant losses. There have been a number of cases involving misconduct by employees in a broad range of industries in recent years, and we run the risk of misconduct by our employees. Instances of misconduct, fraud, illegal acts, errors, failure to document transactions properly or to obtain proper internal authorization, or failure to comply with regulatory requirements or our internal policies may result in losses or reputational damage. It is not always possible to deter or prevent employee errors or misconduct, and the controls and trainings that we have in place to prevent and detect this activity may not be effective in all cases.

Global Operations

We manage our global operations through a network of business entities, which could result in inconsistent management, governance and oversight practices. We manage our global operations through a network of business entities located in the U.S., Bermuda, the U.K., Europe and elsewhere. These business entities are managed by executives, and supported by shared and centralized services; however, for certain of our businesses, subsidiary-level management is responsible for day-to-day operations, profitability, personnel decisions, the growth of the business, and legal and regulatory compliance, including adherence to applicable local laws. Operating through subsidiary-level management can make it difficult for us to implement strategic decisions and coordinated procedures throughout our global operations. In addition, some of our business entities operate with management, sales, and support personnel that may be insufficient to support growth in their respective locations and industries, without significant central oversight and coordination. We continue to enhance our operating, governance and oversight procedures to effectively support, and improve transparency throughout, our global operations and network of business entities; however, our operating strategy nonetheless could result in inconsistent management, governance, and oversight practices, which may have a material adverse effect on our results of operations and financial condition.

We have substantial international operations and investments, which expose us to increased political, civil, operational and economic risks. A substantial portion of our revenues and income is derived from our operations and investments outside the U.S., including from the U.K., Bermuda and Europe. Our international operations and investments expose us to increased political, civil, operational and economic risks. Deterioration or volatility in foreign and international financial markets or general economic and political and civil conditions could adversely affect our operating results, financial condition and liquidity. Concerns about the economic conditions, capital markets, political, civil and economic stability and solvency of certain countries may contribute to global market volatility. Political and civil changes in the jurisdictions where we operate and elsewhere, some of which may be disruptive, can also interfere with our customers and our activities in a particular location. Our international operations also may be subject to a number of additional risks, particularly in emerging economies, including restrictions such as price controls, capital controls, currency exchange limits, ownership limits and other restrictive or anti-competitive governmental actions or requirements, which could have a material adverse effect on our businesses.

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General economic, market or industry conditions could lead to investment losses, adverse effects on our businesses and limit our access to the capital markets. General economic and market conditions and industry specific conditions, including extended economic recessions or expansions; prolonged periods of slow economic growth; inflation or deflation; fluctuations and volatility in foreign currency exchange rates, commodity and energy prices and interest rates; volatility in the credit and capital markets; the imposition of tariffs and other changes in international trade regulation and other factors, could lead to: substantial realized and unrealized investment losses in future periods; declines in demand for, or increased frequency and severity of claims made under, our insurance products; disruptions in global supply chains and increased costs of inputs for our products and services; reduced demand for our services and the products we sell and distribute; and limited or no access to the capital markets. Any of these impacts could have a material adverse effect on our results of operations, financial condition, debt and financial strength ratings or our insurance subsidiaries' capital. Results for many of our Markel Ventures businesses have been, and may continue to be, adversely affected by increased costs of labor and materials, including, with respect to increased materials costs, due to shortages in the availability of certain products, higher shipping costs and inflation. Our efforts to mitigate the impact of these cost increases may not be successful and, even when they are successful, there may be a time lag before the impacts of these efforts are reflected in our results.

Our businesses, results of operations and financial condition could be adversely affected by the ongoing conflict between Russia and Ukraine and related disruptions in the global economy. The global economy has been negatively impacted by the military conflict between Russia and Ukraine. While we have no operations in Russia or Ukraine, some of our businesses have been, and may continue to be, adversely affected by this conflict and its effects. Within our underwriting operations, we have insurance contracts with exposure to losses attributed to the Russia-Ukraine conflict, which we discuss under Item 7 Management's Discussion & Analysis of Financial Condition and Results of Operations. Our other operations do not have significant direct exposure to customers and vendors in Russia or Ukraine. However, certain of our businesses have experienced, and may continue to experience, shortages in materials and increased costs for transportation, energy, and raw materials due in part to the negative impact of the Russia-Ukraine conflict on the global economy.

Furthermore, governments in the U.S., U.K., and European Union, among others, have each imposed export controls on certain products and financial and economic sanctions on certain industry sectors and parties in Russia. These export controls and sanctions, or our failure to comply with them, could result in restrictions on our ability to do business in one or more of the jurisdictions in which we conduct business or have the other adverse effects discussed above under this Item 1A. Risk Factors under "We are subject to laws and regulations relating to economic and trade sanctions and bribery and corruption, the violation of which could have a material adverse effect on us."

We are unable to predict the impact the ongoing conflict will have on our businesses or the global economy. The impact of further escalation of geopolitical tensions related to this conflict, including increased trade barriers or restrictions on global trade, is unknown and could result in, among other things, heightened cybersecurity threats, supply disruptions, protracted or increased inflation, increased energy costs, lower consumer demand, fluctuations in interest and foreign exchange rates and increased volatility in financial markets, any of which could adversely affect our businesses, results of operations and financial condition. In addition, the ongoing conflict may have the effect of triggering or intensifying many of the risks described under this Item 1A Risk Factors under Risks Primarily Related to Our Insurance Operations, Risks Primarily Related to Our Investments and Access to Capital, and Risks Related to All of Our Operations.

Acquisitions, Integration and Retention

The integration of acquired companies may not be as successful as we anticipate. We have completed, and expect to complete, acquisitions in an effort to achieve profitable growth in our underwriting and other insurance operations and to create additional value on a diversified basis in our Markel Ventures operations. Acquisitions present operational, regulatory, strategic and financial risks, as well as risks associated with liabilities arising from the previous operations of the acquired companies. We also must make decisions about the degree to which we integrate acquisitions into our existing businesses, operations and systems, and over what timeframe. Those decisions may adversely affect how successfully the acquired businesses perform, both in the short-term and in the long-term. All of these risks are magnified in the case of a large acquisition. Integration of the operations and personnel of acquired companies may prove more difficult than anticipated, which may result in failure to achieve financial objectives associated with the acquisition or diversion of management attention. In addition, integration of formerly privately-held companies into the management and internal control and financial reporting systems of a publicly-held company presents additional risks. See note 3 of the notes to consolidated financial statements included under Item 8 for information about our recent acquisitions.

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Impairment in the value of our goodwill or other intangible assets could have a material adverse effect on our operating results and financial condition. As of December 31, 2022, goodwill and intangible assets totaled $4.4 billion and represented 34% of shareholders' equity. We record goodwill and intangible assets at fair value upon the acquisition of a business. Goodwill represents the excess of amounts paid to acquire businesses over the fair value of the net assets acquired. Goodwill and indefinite-lived intangible assets are evaluated for impairment annually, or more frequently if events or circumstances indicate that their carrying value may not be recoverable. Declines in operating results, divestitures, sustained market declines and other factors that impact the fair value of a reporting unit could result in an impairment of goodwill or intangible assets and, in turn, a charge to net income. Such a charge could have a material adverse effect on our results of operations or financial condition. Developments that adversely affect the future cash flows or earnings of an acquired business may cause the goodwill or intangible assets recorded for it to be impaired. See "Critical Accounting Estimates - Goodwill and Intangible Assets" included under Item 7 Management's Discussion and Analysis of Financial Condition and Results of Operations and note 8 of the notes to consolidated financial statements included under Item 8 for information about our goodwill and intangible assets.

The loss of one or more key executives or an inability to attract and retain qualified personnel could have a material adverse effect on us. Our success depends on our ability to retain the services of our existing key executives and to attract and retain additional qualified personnel in the future. The temporary or permanent loss of the services of any of our key executives or the inability to hire and retain other highly qualified personnel in the future could have a material adverse effect on our ability to conduct or grow our business.

Information Technology Systems and Third-Party Systems and Service Providers

Information technology systems that we use could fail or suffer a security breach or cyberattack, which could have a material adverse effect on us or result in the loss of regulated or sensitive information. Our businesses are dependent upon the operational effectiveness and security of our enterprise systems and those maintained by third parties. Among other things, we rely on these systems to interact with producers, insureds, customers, clients, and other third parties, to perform actuarial and other modeling functions, to underwrite business, to prepare policies and process premiums, to process claims and make claims payments, to prepare internal and external financial statements and information, as well as to engage in a wide variety of other business activities. A significant failure of our enterprise systems, or those of third parties upon which we may rely, whether because of a natural disaster, network outage or a cyberattack on those systems, including ransomware, could compromise our personal, confidential and proprietary information as well as that of our customers and business partners, impede or interrupt our business operations and could result in other negative consequences, including remediation costs, loss of revenue, additional regulatory scrutiny and fines, litigation and monetary and reputational damages. In addition, if we are unable to innovate, develop and acquire new technology, it may leave us more susceptible to these attacks. Like other companies, we have been subject to cyberattacks, malicious viruses and malware, and denial of service attacks and expect that this will continue in the future with greater sophistication and frequency. Despite any controls or protective actions we take against such attacks, those measures may be insufficient to prevent, or mitigate the effects of, a natural disaster, network outage or a cyberattack on our systems. This could result in liability to us, cause our data to be corrupted or stolen and cause us to commit resources to correct those failures.

In addition, we are subject to numerous data privacy and cybersecurity laws and regulations enacted in the jurisdictions in which we do business. A misuse or mishandling of personal, confidential or proprietary information being sent to or received from a customer, business partner, employee or third party could damage our businesses or our reputation or result in significant monetary damages, regulatory enforcement actions, fines and criminal prosecution in one or more jurisdictions. For example, under the European General Data Protection Regulation there are significant punishments for non-compliance which could result in a penalty of up to 4% of a firm's global annual revenue. In addition, a violation of data privacy laws and regulations could result in defaults under our outstanding indebtedness or credit facilities. Those monetary damages, penalties, regulatory or legal actions or defaults, or the damage to our businesses or reputation, could have a material adverse effect on our results of operations and financial condition. Third parties who we utilize to perform certain functions are also subject to these risks, and their failure to adhere to these laws and regulations also could damage our businesses or reputation or result in regulatory intervention, which could have a material adverse effect on our results of operations and financial condition.

Further, we routinely transmit, receive and store personal, confidential and proprietary information by email and other digital means. Although we attempt to protect this personal, confidential and proprietary information, we may be unable to do so in all cases, especially with business partners and other third parties who may not have or use appropriate controls to protect personal, confidential and proprietary information.

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While we maintain cyber risk insurance providing first-party and third-party coverages, that insurance may not cover all costs associated with the consequences of an enterprise failure, cyberattack, or breach of systems. A material cyber security breach could have a material adverse effect on our results of operations and financial condition.

Third-party providers may perform poorly, breach their obligations to us or expose us to enhanced risks. Certain of our business functions are performed by third-party providers, and these providers may not perform as expected or may fail to adhere to the obligations owed to us. For example, certain of our business units rely on relationships with a number of third-party administrators under contracts pursuant to which these third-party administrators manage and pay claims on our behalf and advise us with respect to case reserves. In these relationships, we rely on controls incorporated in the provisions of the administration agreement, as well as on the administrator's internal controls, to manage the claims process within our prescribed parameters. In addition, certain of our business units use managing general agents, general agents and other producers to write and administer business on our behalf within prescribed underwriting authorities. Although we monitor these administrators, agents, producers and other service providers on an ongoing basis, our monitoring efforts may not be adequate, or our service providers could exceed their authorities or otherwise breach obligations owed to us, which could result in operational disruption, reputational damage and regulatory intervention and otherwise have a material adverse effect on our results of operation and financial condition.

In addition, we utilize third parties to perform certain technology and business process functions, such as data center hosting, cloud based operating environments, human resources and other outsourced services. We have developed and implemented an outsourcing strategy, however, if third-party providers do not perform as expected, we may experience operational difficulties, increased costs and a loss of business, or we may not realize expected productivity improvements or cost efficiencies. Our use of third parties to perform certain technology and business process functions may expose us to risks related to privacy and data security, which could result in monetary and reputational damages. In addition, our ability to receive services from third-party providers might be impacted by a wide variety of factors, including political and civil instability, supply chain disruptions, volatility or disruptions in the financial markets, wide-spread health issues, unanticipated or additional regulatory requirements or policies. As a result, our ability to conduct our businesses may be adversely affected.

Pandemics

Pandemics have had, and could have, material adverse effects on us. The COVID-19 pandemic has had, and its variants or future pandemics could have, material adverse effects on our underwriting, investment, Markel Ventures and other operations, and on our results of operations and financial condition. The effects of a pandemic, and related governmental responses, may be wide-ranging, costly, disruptive and rapidly changing. Factors that give rise, or may give rise, to those effects include, or may include, the following, as well as others that we cannot predict:

•Insured or reinsured losses from pandemic-related claims that are different, or more extensive, than we expect;

•Government actions or judicial decisions related to insurance or reinsurance coverages or rates, including, for example, requiring retroactive coverage of claims or expanding the scope of coverage;

•Disputes, lawsuits and other legal actions challenging the promptness of coverage determinations, or the coverage determinations themselves, under applicable insurance or reinsurance policies, resulting in increased claims, litigation and related expenses;

•Disruptions, delays and increased costs and risks related to having limited or no access to our facilities, workplace re-entry, employee safety concerns and reductions or interruptions of critical or essential services;

•Continually changing business conditions and compliance obligations; and

•Short or long-term impacts on the cost, availability or timeliness of required raw materials, supplies or services provided by third parties, including services provided by state, federal or foreign governments or government agencies.

In addition, a pandemic may, as has been the case with COVID-19, have the effect of triggering or intensifying many of the risks described elsewhere under this Item 1A. Risk Factors under Risks Primarily Related to Our Insurance Operations, Risks Primarily Related to Our Investments and Access to Capital, and Risks Related to All of Our Operations.

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Item 3. LEGAL PROCEEDINGS

Thomas Yeransian v. Markel Corporation

In October 2010, we completed the acquisition of Aspen Holdings, Inc. (Aspen). As part of the consideration for that acquisition, Aspen shareholders received contingent value rights (CVRs). Prior to the December 31, 2017 CVR maturity date, the CVR holder representative, Thomas Yeransian, disputed our prior estimation of the value of the CVRs. On September 15, 2016, Mr. Yeransian filed a suit, Thomas Yeransian v. Markel Corporation (U.S. District Court for the District of Delaware), alleging, among other things, that we are in default under the CVR agreement. The suit seeks: $47.3 million in damages, which represents the unadjusted value of the CVRs; plus interest ($23.6 million through December 31, 2022) and default interest (up to an additional $20.8 million through December 31, 2022, depending on the date any default occurred); and an unspecified amount of punitive damages, costs, and attorneys' fees.

At the initial hearing held February 21, 2017, the court stayed the proceedings and ordered the parties to discuss resolving the dispute pursuant to the independent CVR valuation procedure under the CVR agreement. The parties met on April 5, 2017, but were unsuccessful in reaching agreement on a process for resolving the dispute. We subsequently filed a motion to stay the litigation and compel arbitration, and, on July 31, 2017, the court issued an order granting that motion.

On November 13, 2018, Mr. Yeransian filed a second suit, Thomas Yeransian v. Markel Corporation (U.S. District Court for the District of Delaware), which also alleges that the Company is in default under the CVR agreement. The second suit seeks the same monetary damages and relief as the original suit. We filed a motion to stay this suit until the arbitration for the original suit has concluded and the CVR holders have received the final amount due under the CVR Agreement. The court granted that motion on August 6, 2019.

On June 5, 2020, Yeransian filed a third suit, Thomas Yeransian v. Markel Corporation (U.S. District Court for the District of Delaware). Similar to the first and second suits, the third suit alleges that the Company is in default under the CVR agreement and, in addition, has interfered with the arbitration for the CVR valuation. The third suit seeks the same monetary damages and relief as the original suit and the second suit, as well as other declaratory and non-monetary judgments and orders. We filed a motion to stay this suit, which the court granted on March 16, 2021.

Under the arbitration terms of the CVR Agreement, independent experts were appointed to determine the final value of the CVRs. On September 20, 2021, the experts delivered their report indicating a final CVR valuation of $22.4 million, excluding interest. We had previously paid $8.0 million to the CVR holders, representing 90% of the undisputed value of the CVRs, plus interest of $1.9 million. On September 20, 2021, we paid $20.1 million, which represents $14.1 million for the unpaid portion of the final CVR amount (excluding fees payable to a third party), plus $6.0 million in additional interest.

The stay has been lifted on each pending suit, and the three suits have been consolidated. We have asked the court to dismiss, or grant us summary judgment on, all counts.

We believe Mr. Yeransian's suits to be without merit. We further believe that any material loss resulting from the suits to be remote.

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Information About Our Executive Officers

Thomas S. Gayner

Chief Executive Officer since January 2023. Co-Chief Executive Officer from January 2016 to December 2022. President and Chief Investment Officer from May 2010 to December 2015. Chief Investment Officer from January 2001 to December 2015. Director from 1998 to 2004. Director since August 2016. Age 61.

Michael R. Heaton

Executive Vice President since May 2022. President, Markel Ventures from January 2016 to May 2022. President and Chief Operating Officer, Markel Ventures, Inc., a subsidiary, from May 2020 to May 2022; President and Chief Operating Officer, Markel Ventures, Inc., from January 2016 to May 2020. Chief Operating Officer, Markel Ventures, Inc., from September 2013 to December 2015. Age 46.

Andrew G. Crowley

President, Markel Ventures since May 2022. President, Markel Ventures, Inc., a subsidiary, since May 2022. Executive Vice President, Markel Ventures, Inc., from May 2020 to May 2022. Managing Director, Markel Ventures, Inc., from January 2017 to May 2020. Age 40.

Jeremy A. Noble

President, Insurance since January 2023. Senior Vice President and Chief Financial Officer from September 2018 to December 2022. Senior Vice President, Finance from June 2018 to September 2018. Finance Director, Markel International from July 2015 to June 2018. Managing Director, Internal Audit from September 2011 to July 2015. Age 47.

Brian J. Costanzo

Senior Vice President, Finance, Chief Accounting Officer and Controller since October 2022. Principal financial officer since January 2023. Chief Accounting Officer and Controller from June 2021 to October 2022. Controller from December 2019 to June 2021. Segment Controller - U.S. Insurance from March 2014 to December 2019. Age 44.

Richard R. Grinnan

Senior Vice President, Chief Legal Officer and Secretary since February 2020. General Counsel and Secretary from June 2014 to February 2020. Assistant General Counsel from August 2012 to June 2014. Age 54.

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PART II

Item 5. MARKET FOR REGISTRANT'S COMMON EQUITY, RELATED STOCKHOLDER MATTERS AND ISSUER PURCHASES OF EQUITY SECURITIES

Performance Graph

The following graph compares the cumulative total return (based on share price) on our common stock with the cumulative total return of companies included in the Standard & Poor's (S&P) 500 Index and the Dow Jones U.S. Property & Casualty Insurance Companies Index. We are a diverse financial holding company serving a variety of niche markets, and we believe there are few companies with a mix of business operations comparable to ours. Our principal business markets and underwrites specialty insurance products, and therefore, we have used the Dow Jones U.S. Property & Casualty Insurance Companies Index as our peer group. However, we also own controlling interests in a diverse portfolio of businesses that operate in a variety of industries outside the specialty insurance marketplace. This information is not necessarily indicative of future results.

	Years Ended December 31,
	2017 (1)		2018		2019		2020		2021		2022
Markel Corporation	$	100	$	91	$	100	$	91	$	108	$	116
S&P 500	100		96		126		149		192		157
Dow Jones U.S. Property & Casualty Insurance	100		96		123		126		154		178

(1)$100 invested on December 31, 2017 in our common stock or the listed index. Includes reinvestment of dividends.

Common Stock and Dividend Information

Our common stock trades on the New York Stock Exchange under the symbol MKL. The number of shareholders of record as of February 1, 2023 was approximately 270. The total number of shareholders, including those holding shares in street name or in brokerage accounts, is estimated to be in excess of 210,000. Our current strategy is to retain earnings and, consequently, we have not paid and do not expect to pay a cash dividend on our common stock.

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Common Share Repurchases

The following table summarizes our common share repurchases for the quarter ended December 31, 2022.

Issuer Purchases of Equity Securities
	(a)	(b)		(c)	(d)
	Total Number of Shares Purchased	Average Price Paid per Share		Total Number of Shares Purchased as Part of Publicly Announced Plans or Programs (1)	Approximate Dollar Value of Shares that May Yet Be Purchased Under the Plans or Programs (in thousands)
October 1, 2022 through October 31, 2022	26,454	$	1,153.94	26,454	$	555,120
November 1, 2022 through November 30, 2022	19,230	$	1,249.81	19,230	$	531,086
December 1, 2022 through December 31, 2022	14,894	$	1,298.94	14,894	$	511,740
Total	60,578	$	1,220.02	60,578	$	511,740

(1)    The Board of Directors approved the repurchase of up to $750 million of our common shares pursuant to a share repurchase program publicly announced in February 2022. Under our share repurchase program, we may repurchase outstanding common shares of our stock from time to time in privately negotiated or open market transactions, including under plans complying with Rule 10b5-1 and Rule 10b-18 under the Securities Exchange Act of 1934. The share repurchase program has no expiration date but may be terminated by the Board at any time.

Securities Authorized for Issuance Under Equity Compensation Plans

See Part III for information on securities authorized for issuance under our equity compensation plans.

Available Information

This document represents Markel Corporation's Annual Report on Form 10-K, which is filed with the U.S. Securities and Exchange Commission. We make available free of charge on or through our website our annual reports on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K and all amendments to those reports as soon as reasonably practicable after such material is electronically filed with or furnished to the U.S. Securities and Exchange Commission. Our website address is www.markel.com.

Transfer Agent

American Stock Transfer & Trust Co., LLC, Operations Center, 6201 15th Avenue, Brooklyn, NY 11219

(800) 937-5449 help@astfinancial.com

Annual Shareholders Meeting

Shareholders, employees and friends of Markel are invited to attend our annual shareholders meeting on May 17, 2023 at the University of Richmond Robins Center at 2:00 p.m. (Eastern Time). More information on the agenda and registration is available at www.markelshareholdersmeeting.com.

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Item 7. MANAGEMENT'S DISCUSSION & ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

The following discussion and analysis includes discussion of changes in our results of operations and financial condition from 2021 to 2022 and should be read in conjunction with the consolidated financial statements and related notes included under Item 8, Item 1 Business, Item 1A Risk Factors and "Safe Harbor and Cautionary Statement" under Item 7. The accompanying consolidated financial statements and related notes have been prepared in accordance with United States (U.S.) generally accepted accounting principles (GAAP) and include the accounts of Markel Corporation and its consolidated subsidiaries, as well as any variable interest entities that meet the requirements for consolidation (the Company). A discussion of changes in our results of operations and financial condition from 2020 to 2021 may be found in Part II Item 7 Management's Discussion and Analysis of Financial Condition and Results of Operations in our 2021 Annual Report on Form 10-K, which was filed with the U.S. Securities and Exchange Commission on February 18, 2022.

Item 7 is divided into the following sections:

•Results of Operations

•Liquidity and Capital Resources

•Critical Accounting Estimates

•Safe Harbor and Cautionary Statement

For a discussion of our significant accounting policies, as well as recently issued accounting pronouncements that we have not yet adopted and their expected effects on our consolidated financial position, results of operations and cash flows, see note 1 of the notes to consolidated financial statements included under Item 8.

Results of Operations

The following table presents the components of operating revenues.

	Years Ended December 31,
(dollars in thousands)	2022		2021
Insurance segment	$	6,528,263	$	5,465,284
Reinsurance segment	1,063,347		1,042,048
Insurance-linked securities, program services and other insurance	493,746		342,142
Insurance operations	8,085,356		6,849,474
Net investment income	445,846		367,406
Net investment gains (losses)	(1,595,733)		1,978,534
Other	(17,661)		7,184
Investing segment	(1,167,548)		2,353,124
Markel Ventures segment	4,757,527		3,643,827
Total operating revenues	$	11,675,335	$	12,846,425

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The following table presents the components of comprehensive income (loss) to shareholders.

	Years Ended December 31,
(dollars in thousands)	2022		2021
Insurance segment profit	$	549,871	$	696,413
Reinsurance segment profit (loss)	83,859		(55,129)
Insurance-linked securities, program services and other insurance	295,329		79,512
Amortization of intangible assets (1)	(99,735)		(102,971)
Impairment of goodwill (2)	(80,000)		—
Insurance operations	749,324		617,825
Investing segment profit (loss)	(1,167,548)		2,353,124
Markel Ventures segment profit (3)	325,238		272,552
Interest expense	(196,062)		(183,579)
Net foreign exchange gains	140,209		72,271
Income tax (expense) benefit	47,636		(684,458)
Net income attributable to noncontrolling interests	(112,920)		(22,732)
Net income (loss) to shareholders	(214,123)		2,425,003
Preferred stock dividends	(36,000)		(36,000)
Net income (loss) to common shareholders	(250,123)		2,389,003
Other comprehensive loss to shareholders	(1,094,694)		(346,759)
Comprehensive income (loss) to shareholders	$	(1,308,817)	$	2,078,244

(1)     Amortization of intangible assets includes all amortization attributable to our insurance operations. Amortization of intangible assets attributable to our underwriting segments was $38.5 million and $41.2 million for the years ended December 31, 2022 and 2021, respectively; however, we do not allocate amortization of intangible assets between the Insurance and Reinsurance segments. Amortization of intangible assets attributable to our insurance-linked securities, program services and other insurance operations was $61.2 million and $61.8 million for the years ended December 31, 2022 and 2021, respectively.

(2)     Impairment of goodwill for the year ended December 31, 2022 was attributable to our Nephila ILS operations.

(3)     Segment profit for the Markel Ventures segment includes amortization of intangible assets attributable to Markel Ventures.

Our 2022 results were significantly impacted by decreases in the fair value of our investment portfolio. Net investment losses on our equity portfolio reflect the impact of volatility and overall decline in the public equity markets. The decreases in the fair value of our fixed maturity portfolio were primarily due to increases in interest rates in 2022. Volatility in the public equity and bond markets reflects the impact of economic uncertainty and broader market conditions, which are impacting all three of our operating engines, including high levels of inflation, rising interest rates and global supply chain disruptions.

The change in comprehensive income (loss) to shareholders in 2022 compared to 2021 was primarily due to pre-tax net investment losses of $1.6 billion in 2022, compared to pre-tax net investment gains of $2.0 billion in 2021, as well as pre-tax net unrealized losses on our fixed maturity securities of $1.5 billion in 2022 compared to $504.1 million in 2021.

The components of net income (loss) to shareholders and comprehensive income (loss) to shareholders are discussed in further detail under "Insurance Results," "Investing Results," "Markel Ventures Results," "Interest Expense, Net Foreign Exchange Gains and Income Taxes" and "Comprehensive Income (Loss) to Shareholders and Book Value per Common Share."

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Insurance Results

Our Insurance engine includes our underwriting, insurance-linked securities (ILS), program services and other fronting operations. We have a suite of capabilities through which we can access capital to support our customers' risks, which includes our own capital through our underwriting operations and third-party capital through our ILS and program services operations. Our underwriting operations, which are primarily comprised of our Insurance and Reinsurance segments, produce revenues primarily by underwriting insurance contracts and earning premiums in the specialty insurance market. Our insurance-linked securities and program services operations produce revenues primarily through fees earned for investment management services and fronting services, respectively. Our insurance operations also include the underwriting results of run-off lines of business that were discontinued prior to, or in conjunction with, insurance acquisitions, and the results of our run-off life and annuity reinsurance business. The following table presents the components of our Insurance engine gross premium volume and operating revenues.

	Years Ended December 31,
(dollars in thousands)	2022		2021		% Change
Gross premium volume:
Underwriting	$	9,847,538	$	8,485,929	16	%
Program services and other fronting (1)	3,354,144		2,952,753		14	%
Insurance operations	$	13,201,682	$	11,438,682	15	%
Operating revenues:
Insurance segment	$	6,528,263	$	5,465,284	19	%
Reinsurance segment	1,063,347		1,042,048		2	%
Insurance-linked securities, program services and other insurance	493,746		342,142		44	%
Insurance operations	$	8,085,356	$	6,849,474	18	%

(1)    Substantially all gross premiums from our program services business and other fronting arrangements were ceded to third parties for the years ended December 31, 2022 and 2021.

Underwriting Results

Underwriting profits are a key component of our strategy to build shareholder value. We believe that the ability to achieve consistent underwriting profits demonstrates knowledge and expertise, commitment to superior customer service and the ability to manage insurance risk. The property and casualty insurance industry commonly defines underwriting profit or loss as earned premiums net of losses and loss adjustment expenses and underwriting, acquisition and insurance expenses. We use underwriting profit or loss and the combined ratio as a basis for evaluating our underwriting performance. The U.S. GAAP combined ratio is a measure of underwriting performance and represents the relationship of incurred losses, loss adjustment expenses and underwriting, acquisition and insurance expenses to earned premiums. The combined ratio is the sum of the loss ratio and the expense ratio. The loss ratio represents the relationship of incurred losses and loss adjustment expenses to earned premiums. The expense ratio represents the relationship of underwriting, acquisition and insurance expenses to earned premiums. A combined ratio less than 100% indicates an underwriting profit, while a combined ratio greater than 100% reflects an underwriting loss.

In addition to the U.S. GAAP combined ratio, loss ratio and expense ratio, we also evaluate our underwriting performance using measures that exclude the impacts of certain items on these ratios. We believe these adjusted measures, which are non-GAAP measures, provide financial statement users with a better understanding of the significant factors that comprise our underwriting results and how management evaluates underwriting performance.

When analyzing our combined ratio, we exclude current accident year losses and loss adjustment expenses attributed to natural catastrophes. We also exclude losses and loss adjustment expenses attributed to certain significant, infrequent loss events, for example, the COVID-19 pandemic and the military conflict between Russia and Ukraine that began following Russia's invasion of Ukraine in February 2022. Due to the unique characteristics of a catastrophe loss and other significant, infrequent events, there is inherent variability as to the timing or loss amount, which cannot be predicted in advance. We believe measures that exclude the effects of catastrophe events, COVID-19 and the Russia-Ukraine conflict are meaningful to understand the underlying trends and variability in our underwriting results that may be obscured by these items.

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When analyzing our loss ratio, we evaluate losses and loss adjustment expenses attributable to the current accident year separate from losses and loss adjustment expenses attributable to prior accident years. Prior accident year reserve development, which can either be favorable or unfavorable, represents changes in our estimates of losses and loss adjustment expenses related to loss events that occurred in prior years. We believe a discussion of current accident year loss ratios, which exclude prior accident year reserve development, is helpful since it provides more insight into estimates of current underwriting performance and excludes changes in estimates related to prior year loss reserves. We also analyze our current accident year loss ratio excluding losses and loss adjustment expenses attributable to catastrophes and, in 2022, the Russia-Ukraine conflict. The current accident year loss ratio excluding the impact of catastrophes and other significant, infrequent loss events is also commonly referred to as an attritional loss ratio within the property and casualty insurance industry.

The following table presents summary data for our consolidated underwriting operations, which are comprised predominantly of our Insurance and Reinsurance segments. Our consolidated underwriting results also include results from discontinued lines of business and the retained portion of our program services operations.

	Years Ended December 31,
(dollars in thousands)	2022			2021			% Change
Gross premium volume	$	9,843,555		$	8,480,494		16	%
Net written premiums	$	8,203,390		$	7,119,731		15	%
Earned premiums	$	7,587,792		$	6,503,029		17	%
Underwriting profit	$	626,620		$	628,085		—	%
Underwriting Ratios (1)							Point Change
Loss ratio
Current accident year loss ratio	60.8		%	62.4		%	(1.6)
Prior accident years loss ratio	(2.2)		%	(7.4)		%	5.2
Loss ratio	58.6		%	55.1		%	3.5
Expense ratio	33.2		%	35.3		%	(2.1)
Combined ratio	91.7		%	90.3		%	1.4
Current accident year loss ratio catastrophe impact (2)	0.6		%	3.0		%	(2.4)
Current accident year loss ratio Russia-Ukraine conflict impact (2)	0.5		%	—		%	0.5
Prior accident years loss ratio COVID-19 impact (2)	(0.1)		%	0.2		%	(0.3)
Current accident year loss ratio, excluding catastrophes and Russia-Ukraine conflict	59.7		%	59.4		%	0.3
Combined ratio, excluding current year catastrophes, Russia-Ukraine conflict and COVID-19	90.7		%	87.1		%	3.6

(1)    Amounts may not reconcile due to rounding.

(2)    The point impact of catastrophes, the Russia-Ukraine conflict and COVID-19 is calculated as the associated net losses and loss adjustment expenses divided by total earned premiums.

Premiums

The increase in gross premium volume in our underwriting operations in 2022 was driven by growth within our Insurance segment across all product lines. Net retention of gross premium volume for our underwriting operations was 83% in 2022 compared to 84% in 2021. The decrease in net retention in 2022 was driven by lower retention within our Insurance segment, partially offset by higher retention within our Reinsurance segment. Within our underwriting operations, we purchase reinsurance and retrocessional reinsurance to manage our net retention on individual risks and overall exposure to losses and to enable us to write policies with sufficient limits to meet policyholder needs. The increase in earned premiums in our underwriting operations in 2022 was primarily attributable to higher gross premium volume.

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Since 2018, we have seen rate strengthening across most product lines following the continued high level of natural catastrophes and significant losses attributed to the COVID-19 pandemic, as well as general market conditions. However, we began to see rate increases moderate on many of our product lines in 2022. In some product lines, such as directors and officers, we even began to see single digit rate decreases in the latter part of 2022. The overall strengthening of rates in recent years has been most prominent within our professional liability and general liability product lines, reflecting the impacts of both economic and social inflation on loss costs. Recent increases in economic and social inflation have created more uncertainty around the ultimate losses that will be incurred to settle claims on these longer-tail product lines. These factors, as well as the impacts of the low interest rate environment on interest income in recent years, have contributed to the strong rate environment. The primary exception to the favorable rate environment is workers' compensation, where we continue to see low single digit rate decreases given generally favorable loss experience in recent years. When we believe the prevailing market price will not support our underwriting profit targets, the business is not written. As a result of our underwriting discipline, gross premium volume may vary when we alter our product offerings to maintain or improve underwriting profitability.

Combined Ratio

In 2022, underwriting results included $46.2 million and $35.7 million of net losses and loss adjustment expenses attributed to Hurricane Ian and the Russia-Ukraine conflict, respectively. The net losses and loss adjustment expenses from Hurricane Ian and the Russia-Ukraine conflict were net of ceded losses of $115.3 million and $44.3 million, respectively. In 2021, underwriting results included $195.0 million of net losses and loss adjustment expenses attributed to Winter Storm Uri, the floods in Europe and Hurricane Ida (2021 Catastrophes), as well as $15.7 million of net losses and loss adjustment expenses resulting from an increase in our net estimate of ultimate losses and loss adjustment expenses attributed to COVID-19. The net losses and loss adjustment expenses from the 2021 Catastrophes were net of ceded losses of $221.7 million. Excluding these losses from the respective periods, the increase in our consolidated combined ratio in 2022 compared to 2021 was driven by the impact of less favorable development on prior accident years loss reserves within our Insurance segment in 2022 compared to 2021, partially offset by a lower expense ratio within our Insurance segment.

Russia-Ukraine Conflict

Our results reflect underwriting losses from the military conflict between Russia and Ukraine that began following Russia's invasion of Ukraine in February 2022. The ongoing conflict has also contributed to certain aspects of the current economic conditions impacting all of our operations. For further discussion regarding the Russia-Ukraine conflict and risks related to our businesses, see the risk factor titled "Our businesses, results of operations and financial condition could be adversely affected by the ongoing conflict between Russia and Ukraine and related disruptions in the global economy" under Item 1A Risk Factors.

Our losses and loss adjustment expenses from the Russia-Ukraine conflict are primarily attributed to business written within our international insurance and reinsurance operations and are primarily associated with war and terrorism coverages within our marine and energy product lines, as well as our trade credit and surety product lines. We purchase significant excess of loss reinsurance on the impacted product lines to reduce our net exposures, resulting in significant ceded losses. See note 11 of the notes to consolidated financial statements included under Item 8 for further details on our estimate of ultimate gross and net losses and loss adjustment expenses attributed to the Russia-Ukraine conflict.

COVID-19 Pandemic

Our losses from the COVID-19 pandemic were primarily attributed to business written within our international insurance operations and were primarily associated with coverages for event cancellation and business interruption losses on policies where no specific pandemic exclusion existed. Our estimates of ultimate gross and net losses and loss adjustment expenses attributed to COVID-19 are based on reported claims and still include assumptions about coverage, liability and ceded reinsurance contract attachment, which, in some cases, remain subject to judicial review, and represent our best estimate as of December 31, 2022 based upon information currently available. We continue to closely monitor reported claims, claim settlements, ceded reinsurance contract settlements and judicial decisions and may adjust our estimates as new information becomes available.

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Insurance Segment

	Years Ended December 31,
(dollars in thousands)	2022			2021			% Change
Gross premium volume	$	8,606,700		$	7,239,676		19	%
Net written premiums	$	7,040,176		$	5,998,890		17	%
Earned premiums	$	6,528,263		$	5,465,284		19	%
Underwriting profit	$	549,871		$	696,413		(21)	%
Underwriting Ratios (1)							Point Change
Loss ratio
Current accident year loss ratio	60.3		%	60.6		%	(0.3)
Prior accident years loss ratio	(2.2)		%	(9.3)		%	7.1
Loss ratio	58.1		%	51.3		%	6.8
Expense ratio	33.5		%	35.9		%	(2.4)
Combined ratio	91.6		%	87.3		%	4.3
Current accident year loss ratio catastrophe impact (2)	0.7		%	1.7		%	(1.0)
Current accident year loss ratio Russia-Ukraine conflict impact (2)	0.4		%	—		%	0.4
Prior accident years loss ratio COVID-19 impact (2)	0.0		%	(0.1)		%	0.1
Current accident year loss ratio, excluding catastrophes and Russia-Ukraine conflict	59.2		%	58.9		%	0.3
Combined ratio, excluding current year catastrophes, Russia-Ukraine conflict and COVID-19	90.6		%	85.6		%	5.0

(1)    Amounts may not reconcile due to rounding.

(2)    The point impact of catastrophes, the Russia-Ukraine conflict and COVID-19 is calculated as the associated net losses and loss adjustment expenses divided by total earned premiums.

Premiums

The increase in gross premium volume in our Insurance segment in 2022 was driven by new business volume, strong policy retention levels, more favorable rates and expanded product offerings, resulting in growth across all of our product lines, most notably in our general liability and professional liability product lines. Net retention of gross premium volume was 82% in 2022 compared to 83% in 2021. The decrease in net retention for the year ended December 31, 2022 was primarily due to higher cession rates on our professional liability and personal lines product lines in 2022 compared to 2021, partially offset by the impact of higher retention rates on new programs business. The increase in earned premiums in 2022 was primarily due to higher gross premium volume.

Combined Ratio

The Insurance segment's current accident year losses and loss adjustment expenses in 2022 included $46.2 million and $23.0 million of net losses and loss adjustment expenses attributed to Hurricane Ian and the Russia-Ukraine conflict, respectively. Current accident year losses in 2021 included $94.7 million of net losses and loss adjustment expenses attributed to the 2021 Catastrophes. Excluding these losses from the respective periods, the current accident year loss ratio in 2022 was consistent with 2021. Despite achieving higher premium rates on our professional liability and general liability product lines, we generally kept our estimates of ultimate loss ratios on these product lines for the 2022 accident year consistent with the 2021 accident year due to the unfavorable claims trend within these product lines on prior accident years during 2022 arising from current and anticipated levels of economic and social inflation.

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The Insurance segment's 2022 combined ratio included $142.9 million of favorable development on prior accident years loss reserves compared to $506.3 million in 2021. The decrease in favorable development was primarily due to adverse development on our professional liability and general liability product lines in 2022 compared to favorable development in 2021. Adverse development on our professional liability and general liability product lines in 2022 was primarily attributable to unfavorable claim settlements and increased claim frequency and severity on a number of products, including directors and officers, errors and omissions and employment practices liability within professional liability and contractors and excess and umbrella within general liability. Development on prior years loss reserves within our professional liability and general liability product lines in 2022 was impacted by broader market conditions, including the effects of economic and social inflation. These factors have created more uncertainty around the ultimate losses that will be incurred to settle claims on these longer-tail product lines, and as a result, we are approaching reductions to prior year loss reserves on more recent accident years cautiously. Consistent with our reserving philosophy, we are responding quickly to increase loss reserves following any indication of increased claims frequency or severity in excess of our previous expectations, whereas in instances where claims trends are more favorable than we previously anticipated, we are often waiting to reduce loss reserves and will evaluate our experience over additional periods of time.

In 2022, favorable development was most significant on our workers' compensation, programs, property and credit and surety product lines. In 2021, favorable development was most significant on our general liability, property, workers' compensation, professional liability and marine and energy product lines. See note 11 of the notes to consolidated financial statements included under Item 8 for more information on the Insurance segment's prior year loss reserve development.

The decrease in the Insurance segment's expense ratio in 2022 was primarily due to the favorable impact of higher earned premiums in 2022 while maintaining consistent levels of general expenses with 2021, as we continue to focus on scaling our insurance operations.

Reinsurance Segment

	Years Ended December 31,
(dollars in thousands)	2022			2021			% Change
Gross premium volume	$	1,229,851		$	1,246,143		(1)	%
Net written premiums	$	1,167,312		$	1,126,167		4	%
Earned premiums	$	1,063,347		$	1,042,048		2	%
Underwriting profit (loss)	$	83,859		$	(55,238)		NM (1)
Underwriting Ratios (2)							Point Change
Loss ratio
Current accident year loss ratio	63.6		%	72.0		%	(8.4)
Prior accident years loss ratio	(2.4)		%	1.9		%	(4.3)
Loss ratio	61.2		%	73.9		%	(12.7)
Expense ratio	30.9		%	31.4		%	(0.5)
Combined ratio	92.1		%	105.3		%	(13.2)
Current accident year loss ratio catastrophe impact (3) (4)	—		%	9.6		%	(9.6)
Current accident year loss ratio Russia-Ukraine impact (3)	1.2		%	—		%	1.2
Prior accident years loss ratio COVID-19 impact (3)	(0.3)		%	2.1		%	(2.4)
Current accident year loss ratio, excluding catastrophes and Russia-Ukraine conflict	62.4		%	62.3		%	0.1
Combined ratio, excluding current year catastrophes, Russia-Ukraine conflict and COVID-19	91.2		%	93.6		%	(2.4)

(1)    NM - Ratio is not meaningful

(2)    Amounts may not reconcile due to rounding.

(3)    The point impact of catastrophes, the Russia-Ukraine conflict and COVID-19 is calculated as the associated net losses and loss adjustment expenses divided by total earned premiums.

(4)    The point impact of catastrophes does not include the favorable impact of assumed reinstatement premiums associated with the 2021 Catastrophes of $21.7 million for the year ended December 31, 2021. Reinstatement premiums were not significant for the year ended December 31, 2022.

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Premiums

The modest decrease in gross premium volume in our Reinsurance segment in 2022 was primarily attributable to non-renewals within our property product lines and the non-renewal of a large treaty within our workers' compensation product line, largely offset by the impact of new business, primarily within our general liability and professional liability product lines, and more favorable premium adjustments within our credit and surety product lines. We discontinued writing property retrocessional reinsurance in 2022 and property reinsurance in 2021, which resulted in a $123.3 million reduction in gross premium volume in 2022 compared to 2021. Significant variability in gross premium volume can be expected in our Reinsurance segment due to individually significant contracts and multi-year contracts.

Net retention of gross premium volume was 95% in 2022 compared to 90% in 2021. The increase in net retention was driven by changes in mix of business. We have experienced growth in highly retained product lines during the year, while the non-renewed property business had a lower retention rate than the rest of the segment.

The increase in earned premiums in 2022 was primarily attributable to growth in gross premium volume within our professional liability and general liability product lines in recent periods, partially offset by the impact of lower gross premiums within our property product lines.

Combined Ratio

The Reinsurance segment's current accident year losses and loss adjustment expenses in 2022 included $12.7 million of net losses and loss adjustment expenses attributed to the Russia-Ukraine conflict. Current accident year losses in 2021 included $100.3 million of net losses and loss adjustment expenses attributed to the 2021 Catastrophes. Excluding these losses from the respective periods, the current accident year loss ratio in 2022 was consistent with 2021. The benefit of higher premium rates on our general liability and professional liability product lines and more favorable premium adjustments in 2022 compared to 2021 was offset by the unfavorable impact of changes in the mix of business within the segment and the benefit in 2021 of $21.7 million of favorable assumed reinstatement premiums on catastrophes. The change in mix of business had an unfavorable impact as the non-renewed property business had a lower attritional loss ratio than the rest of the segment.

The Reinsurance segment's 2022 combined ratio included $26.1 million of favorable development on prior accident years loss reserves, which was primarily attributable to favorable development within our property product lines related to natural catastrophes and our credit and surety product lines. Favorable development on prior years loss reserves in 2022 was partially offset by additional exposures recognized on prior accident years related to net favorable premium adjustments on our general liability, credit and surety and professional liability product lines. In 2021, the combined ratio included $19.9 million of adverse development on prior accident years loss reserves, which was primarily attributable to net adverse development on natural catastrophes and COVID-19 within our property product lines, as well as additional exposures recognized on prior accident years related to net favorable premium adjustments on our professional liability product lines. See note 11 of the notes to consolidated financial statements included under Item 8 for more information on the Reinsurance segment's prior year loss reserve development.

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Insurance-linked Securities, Program Services and Other Insurance

The following table presents the components of operating revenues and operating expenses attributable to our insurance-linked securities, program services and other insurance operations, including our run-off block of life and annuity reinsurance contracts, none of which are included in a reportable segment. Underwriting results attributable to these operations include results from discontinued lines of business, which are reported separate from our Insurance and Reinsurance segments, and the retained portion of our program services operations. Investment income earned on the investments that support life and annuity policy benefit reserves are included in our Investing segment.

	Years Ended December 31,
	2022						2021
(dollars in thousands)	Operating revenues		Operating expenses		Net		Operating revenues		Operating expenses		Net
Services and other:
Insurance-linked securities	$	109,020	$	125,316	$	(16,296)	$	202,019	$	186,510	$	15,509
Insurance-linked securities - disposition gains	225,828		—		225,828		—		—		—
Program services and other fronting	149,993		27,613		122,380		125,716		20,132		105,584
Life and annuity	1,040		10,723		(9,683)		1,515		16,667		(15,152)
Markel CATCo buy-out	—		101,904		(101,904)		—		—		—
Markel CATCo Re	—		(89,862)		89,862		—		—		—
Other	11,683		19,431		(7,748)		17,195		30,534		(13,339)
	497,564		195,125		302,439		346,445		253,843		92,602
Underwriting	(3,818)		3,292		(7,110)		(4,303)		8,787		(13,090)
	493,746		198,417		295,329		342,142		262,630		79,512
Amortization of intangible assets			61,202		(61,202)				61,789		(61,789)
Impairment of goodwill			80,000		(80,000)				—		—
	$	493,746	$	339,619	$	154,127	$	342,142	$	324,419	$	17,723

Insurance-Linked Securities

The decrease in operating revenues and operating expenses in our Nephila insurance-linked securities operations in 2022 was primarily due to the disposition of our Velocity and Volante managing general agent operations during the year. Operating losses in 2022 were driven by costs incurred by Volante in connection with its launch of a Lloyd's of London syndicate prior to disposition.

Since our acquisition of Nephila in 2018, we experienced significant growth in the Velocity and Volante managing general agent operations. In 2022, we realized the significant value created since 2018 through the sale of Velocity and Volante. We sold the majority of our controlling interest in Velocity in February 2022 for total cash consideration of $181.3 million, which resulted in a gain of $107.3 million. Velocity provides risk origination services for our Nephila fund management operations, as well as for third parties, and was a source of growth within our ILS operations since we acquired Nephila in 2018. We continue to have a minority interest in Velocity after the sale, and Velocity will continue to be a source for risk origination for our Nephila fund management operations. We sold our controlling interest in Volante in October 2022 for total cash consideration of $181.9 million of which $155.6 million was cash. This transaction resulted in a gain of $118.5 million. Volante, which has also been a source of growth within our ILS operations, underwrites and administers specialty insurance and reinsurance policies and provides delegated underwriting services to third-party providers of insurance capital.

Following the sales of our Velocity and Volante managing general agent operations, our Nephila ILS operations are solely comprised of our fund management operations. Since acquiring Nephila in 2018, investment performance in the broader ILS market has been adversely impacted by consecutive years of elevated catastrophe losses, most recently with Hurricane Ian in 2022. These events, as well as recent volatility in the capital markets, have impacted investor decisions around allocation of capital to ILS, which in turn has impacted our capital raises and redemptions within the funds we manage. Additionally, increases in the cost of capital during 2022 further impacted the estimated fair value of our fund management operations, and ultimately resulted in an $80.0 million partial impairment of goodwill in 2022. Nephila's net assets under management were $7.2 billion as of December 31, 2022. See "Critical Accounting Estimates - Goodwill and Intangible Assets" for further discussion of goodwill impairment at our Nephila ILS operations.

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Program Services and Other Fronting

The increase in operating revenues in our program services and other fronting operations in 2022 was primarily due to higher gross earned premium, on which our fees are based, in 2022 compared to 2021, driven by the expansion of existing programs and growth from new programs, as well as the growth of our other fronting arrangements. Gross written premiums in our program services operations were $2.8 billion and $2.7 billion for the years ended December 31, 2022 and 2021, respectively. Gross written premiums from our other fronting operations, which consist of business written by our underwriting platform on behalf of our ILS operations, were $553.9 million and $223.5 million for the years ended December 31, 2022 and 2021, respectively.

Markel CATCo Buy-Out

In March 2022, we completed a buy-out transaction with Markel CATCo Re Ltd. (Markel CATCo Re) and Markel CATCo Reinsurance Fund Ltd. (the Markel CATCo Funds) that provided for an accelerated return of all remaining capital to investors in the Markel CATCo Funds and resulted in the consolidation of Markel CATCo Re upon completion of the transaction. In order to complete the transaction, we made $101.9 million in payments, net of insurance proceeds, to or for the benefit of investors that were recognized as an expense during the first quarter of 2022. In 2022, results attributable to Markel CATCo Re were primarily related to favorable loss reserve development on the run-off of the reinsurance contracts, all of which were attributable to noncontrolling interest holders in Markel CATCo Re. See note 17 of the notes to consolidated financial statements for further details regarding our Markel CATCo operations and the consolidation of Markel CATCo Re and note 21 for further details about the buy-out transaction.

Investing Results

Our business strategy recognizes the importance of both consistent underwriting and operating profits and superior investment returns to build shareholder value. We rely on sound underwriting practices to produce investable funds. We measure our investment performance by analyzing net investment income earned on our investment portfolio, as well as through net investment gains, which includes unrealized gains on our equity portfolio, and the change in net unrealized gains on available-for-sale investments. Our performance measures also include investment yield and taxable equivalent total investment return. Other income or losses within our investing operations primarily relate to equity method investments in our investing segment, which are managed separately from the rest of our investment portfolio. Based on the potential for volatility in the financial markets, we believe investment performance is best analyzed over several years.

The following table summarizes our consolidated investment performance, which consists predominantly of the results of our Investing segment.

	Years Ended December 31,
(dollars in thousands)	2022			2021			2020			2019			2018
Net investment income	$	446,755		$	367,417		$	375,826		$	442,182		$	435,258
Net investment gains (losses)	$	(1,595,733)		$	1,978,534		$	617,979		$	1,601,722		$	(437,596)
Change in net unrealized gains (losses) on available-for-sale investments (1)	$	(1,407,316)		$	(450,096)		$	442,089		$	381,890		$	(299,446)
Other	$	(17,661)		$	7,184		$	(3,996)		$	9,706		$	(1,043)
Investment Ratios
Investment yield (2)	2.2		%	2.0		%	2.4		%	2.9		%	2.8		%
Taxable equivalent total investment return	(9.5)		%	8.8		%	9.4		%	14.6		%	(1.0)		%

(1)    The change in net unrealized gains (losses) on available-for-sale investments included a benefit related to an adjustment to decrease our life and annuity benefit reserves of $56.6 million and $63.0 million for the years ended December 31, 2022 and 2021, respectively, and a loss related to an adjustment to increase our life and annuity benefit reserves of $68.2 million and $51.4 million for the years ended December 31, 2020 and 2019, respectively. There was no adjustment to our life and annuity benefit reserves for the year ended December 31, 2018. See note 13 of the notes to consolidated financial statements included under Item 8 for details on our life and annuity benefit reserve adjustments.

(2)    Investment yield reflects net investment income as a percentage of monthly average invested assets at amortized cost.

The increase in net investment income in 2022 was primarily attributable to higher interest income on short-term investments and cash equivalents due to higher short-term interest rates in 2022 compared to 2021. Additionally, interest income on our fixed maturity securities increased in 2022, primarily attributable to higher average holdings of fixed maturity securities,

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partially offset by a lower yield during 2022 compared to 2021. See note 4(d) of the notes to consolidated financial statements included under Item 8 for further details regarding the components of net investment income.

Net investment losses in 2022 were primarily attributable to decreases in the fair value of our equity portfolio driven by unfavorable market value movements in 2022. Net investment gains in 2021 were primarily attributable to increases in the fair value of our equity portfolio driven by favorable market value movements in 2021. See note 4(e) of the notes to consolidated financial statements included under Item 8 for further details on the components of net investment gains (losses).

The change in net unrealized gains (losses) on available-for-sale investments in 2022 and 2021 was attributable to decreases in the fair value of our fixed maturity investment portfolio as a result of increases in interest rates during 2022 and 2021.

Taxable equivalent total investment return is a non-GAAP financial measure. Taxable equivalent total investment return includes items that impact net income, such as coupon interest on fixed maturity securities, changes in fair value of equity securities, dividends on equity securities and realized investment gains or losses on available-for-sale securities, as well as changes in unrealized gains or losses on available-for-sale securities, which do not impact net income. Certain items that are included in net investment income have been excluded from the calculation of taxable equivalent total investment return, such as amortization and accretion of premiums and discounts on our fixed maturity portfolio, to provide a comparable basis for measuring our investment return against industry investment returns. The calculation of taxable equivalent total investment return also includes the current tax benefit associated with income on certain investments that is either taxed at a lower rate than the statutory income tax rate or is not fully included in U.S. taxable income. We believe the taxable equivalent total investment return is a better reflection of the economics of our decision to invest in certain asset classes. We focus on our long-term investment return, understanding that the level of investment gains or losses may vary from one period to the next.

We believe our investment performance is best analyzed using taxable equivalent total investment return over several years. The following table presents taxable equivalent total investment return before and after the effects of foreign currency movements.

											Five-Year Annual Return		Ten-Year Annual Return		Twenty-Year Annual Return
	Years Ended December 31,
	2022		2021		2020		2019		2018
Equities	(16.0)	%	29.6	%	15.2	%	30.0	%	(3.5)	%	9.5	%	13.2	%	11.0	%
Fixed maturity securities, cash and short-term investments (1)	(5.8)	%	(0.7)	%	5.7	%	6.5	%	1.3	%	1.3	%	2.0	%	3.6	%
Total portfolio, before foreign currency effect	(9.2)	%	9.0	%	8.6	%	14.4	%	(0.7)	%	4.1	%	5.1	%	5.5	%
Total portfolio	(9.5)	%	8.8	%	9.4	%	14.6	%	(1.0)	%	4.1	%	4.8	%	5.5	%

(1)    Includes cash and cash equivalents and restricted cash and cash equivalents.

The following table reconciles investment yield to taxable equivalent total investment return.

	Years Ended December 31,
	2022		2021		2020		2019		2018
Investment yield (1)	2.2	%	2.0	%	2.4	%	2.9	%	2.8	%
Adjustment of investment yield from amortized cost to fair value	(0.5)	%	(0.6)	%	(0.5)	%	(0.7)	%	(0.6)	%
Net amortization of net premium on fixed maturity securities	0.4	%	0.4	%	0.4	%	0.4	%	0.4	%
Net investment gains (losses) and change in net unrealized investment gains on available-for-sale securities	(12.5)	%	5.9	%	5.8	%	10.3	%	(3.8)	%
Taxable equivalent effect for interest and dividends (2)	0.1	%	0.1	%	0.1	%	0.2	%	0.1	%
Other (3)	0.8	%	1.0	%	1.2	%	1.5	%	0.1	%
Taxable equivalent total investment return	(9.5)	%	8.8	%	9.4	%	14.6	%	(1.0)	%

(1)    Investment yield reflects net investment income as a percentage of monthly average invested assets at amortized cost.

(2)    Adjustment to tax-exempt interest and dividend income to reflect a taxable equivalent basis.

(3)    Adjustment to reflect the impact of time-weighting the inputs to the calculation of taxable equivalent total investment return.

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Markel Ventures Results

Our Markel Ventures segment includes a diverse portfolio of businesses from different industries that offer various types of products and services to businesses and consumers, predominantly in the United States. We measure Markel Ventures' results by its operating income and net income, as well as earnings before interest, income taxes, depreciation and amortization (EBITDA). We consolidate the results of our Markel Ventures subsidiaries on a one-month lag, with the exception of significant transactions or events that occur during the intervening period.

In December 2021, we acquired a controlling interest in Metromont LLC (Metromont), a precast concrete manufacturer and concrete building solutions provider for commercial projects. In August 2021, we acquired a controlling interest in Buckner HeavyLift Cranes (Buckner), a provider of crane rental services for large commercial contractors. See note 3 of the notes to consolidated financial statements included under Item 8 for additional details related to these acquisitions.

The following table summarizes the operating revenues, operating income, EBITDA and net income to shareholders from our Markel Ventures segment.

	Years ended December 31,
(dollars in thousands)	2022		2021		% Change
Operating revenues	$	4,757,527	$	3,643,827	31	%
Operating income	$	325,238	$	272,552	19	%
EBITDA	$	506,336	$	402,700	26	%
Net income to shareholders	$	192,601	$	174,407	10	%

The increase in operating revenues in 2022 was driven by the contribution from Metromont, which was acquired in December 2021, as well as an increased contribution from Buckner, which was acquired in August 2021. The combined contribution to the increase in operating revenues in 2022 attributable to these acquisitions was $604.6 million. Additionally, operating revenues in 2022 increased as a result of the impact of increased demand and higher prices at many of our other businesses, most notably at our construction services businesses.

The benefit of increases in operating revenues to operating income, EBITDA and net income to shareholders in 2022 was reduced by increased costs of materials and labor across many of our businesses, which reflected the impact of broader economic conditions on our operations during the year. The higher cost of materials was due in part to a shortage in the availability of certain products, the higher cost of shipping and a prolonged period of elevated inflation. We attempted to mitigate the impact of these cost increases through a variety of actions, such as increasing the prices of our products and services, pre-purchasing materials, locking in prices in advance or utilizing alternative sources of materials. Our businesses have had varying levels of success with these efforts, and we have seen conditions stabilize to varying degrees at many of our businesses. However, high labor costs continue to impact our businesses and there can be a time lag before the impacts of changes are reflected in our margins.

The increases in operating income, EBITDA and net income to shareholders in 2022 were primarily due to the impact of higher revenues and improved operating results at our construction services businesses, transportation-related businesses and consulting services businesses, as well as the contribution of Metromont. These increases were partially offset by the impact of lower operating margins at one of our consumer and building products businesses in 2022 compared to 2021.

Markel Ventures EBITDA is a non-GAAP financial measure. We use Markel Ventures EBITDA as an operating performance measure in conjunction with U.S. GAAP measures, including operating income and net income to shareholders, to monitor and evaluate the performance of our Markel Ventures segment. Because EBITDA excludes interest, income taxes, depreciation and amortization, it provides an indicator of economic performance that is useful to both management and investors in evaluating our Markel Ventures businesses as it is not affected by levels of debt, interest rates, effective tax rates or levels of depreciation or amortization resulting from purchase accounting.

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The following table reconciles Markel Ventures operating income to Markel Ventures EBITDA.

	Years ended December 31,
(dollars in thousands)	2022		2021
Markel Ventures operating income	$	325,238	$	272,552
Depreciation expense	102,055		72,580
Amortization of intangible assets	79,043		57,568
Markel Ventures EBITDA	$	506,336	$	402,700

The following tables present condensed financial information reflecting the financial position, results of operations and cash flows of Markel Ventures, Inc., and also summarizing the amounts recognized in the consolidated financial statements included under Item 8 for the Markel Ventures segment, unless otherwise noted.

CONDENSED BALANCE SHEETS
	December 31,
(dollars in thousands)	2022		2021
ASSETS
Cash and cash equivalents	$	315,452	$	321,473
Receivables	636,161		501,349
Goodwill	1,153,909		1,196,590
Intangible assets	796,297		766,179
Other assets:
Inventory	639,562		529,250
Property, plant and equipment, net	1,028,156		948,971
Right-of-use lease assets	409,014		393,551
Other	337,126		300,916
Total other assets	2,413,858		2,172,688
Total Assets	$	5,315,677	$	4,958,279
LIABILITIES AND EQUITY
Debt (1)	1,222,152		1,140,559
Other liabilities:
Accounts payable and accrued liabilities	$	355,037	$	320,375
Lease liabilities	421,089		445,683
Other	625,215		544,718
Total other liabilities	1,401,341		1,310,776
Total Liabilities	2,623,493		2,451,335
Redeemable noncontrolling interests	523,154		461,378
Shareholders' equity (2)	2,172,935		2,050,675
Noncontrolling interests	(3,905)		(5,109)
Total Equity	2,169,030		2,045,566
Total Liabilities and Equity	$	5,315,677	$	4,958,279

(1)     Debt as of December 31, 2022 and 2021 included $808.1 million and $853.0 million, respectively, of debt due to other subsidiaries of Markel Corporation, which was eliminated in consolidation.

(2)     Shareholders' equity as of December 31, 2022 and 2021 included $1.4 billion of common stock, which represents Markel Corporation's investment in Markel Ventures, Inc. and which was eliminated in consolidation.

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CONDENSED STATEMENTS OF INCOME
	Years ended December 31,
(dollars in thousands)	2022		2021
OPERATING REVENUES
Products revenues	$	2,427,096	$	1,712,120
Services and other revenues	2,329,522		1,931,696
Net investment income	909		11
Total Operating Revenues	4,757,527		3,643,827
OPERATING EXPENSES
Products expenses	2,241,736		1,544,506
Services and other expenses	2,111,510		1,769,201
Amortization of intangible assets	79,043		57,568
Total Operating Expenses	4,432,289		3,371,275
Operating Income	325,238		272,552
Net foreign exchange gains	3,140		1,119
Interest expense (1)	(46,780)		(35,031)
Income Before Income Taxes	281,598		238,640
Income tax expense	(61,588)		(43,626)
Net Income	220,010		195,014
Net income attributable to noncontrolling interests	(27,409)		(20,607)
Net Income to Shareholders	$	192,601	$	174,407

(1)    Interest expense for the years ended December 31, 2022 and 2021 included intercompany interest expense of $27.4 million and $25.8 million, respectively, which was eliminated in consolidation.

CONDENSED STATEMENTS OF CASH FLOWS
	Years ended December 31,
(dollars in thousands)	2022		2021
Cash, cash equivalents, restricted cash and restricted cash equivalents, beginning of year	$	321,473	$	363,532
Net cash provided by operating activities	260,286		187,180
Net cash used by investing activities	(302,770)		(585,971)
Net cash provided by financing activities (1) (2)	37,897		356,562
Effect of foreign currency rate changes on cash, cash equivalents, restricted cash and restricted cash equivalents	(1,434)		170
Decrease in cash, cash equivalents, restricted cash and restricted cash equivalents	(6,021)		(42,059)
Cash, cash equivalents, restricted cash and restricted cash equivalents, end of year	$	315,452	$	321,473

(1)    Net cash provided by financing activities for the year ended December 31, 2021 included a capital contribution from our holding company, Markel Corporation, of $250.0 million, which was eliminated in consolidation. There were no capital contributions from our holding company for the year ended December 31, 2022.

(2)    Net cash provided by financing activities for the year ended December 31, 2022 included net repayments of intercompany debt of $44.9 million, which were eliminated in consolidation. Net cash provided by financing activities for the year ended December 31, 2021 included net additions to intercompany debt of $120.0 million, which were eliminated in consolidation.

Interest Expense, Net Foreign Exchange Gains and Income Taxes

Interest Expense

Interest expense was $196.1 million in 2022 compared to $183.6 million in 2021. The increase in interest expense in 2022 was primarily attributable to higher Markel Ventures interest expense and the issuance of our 3.45% unsecured senior notes issued in May 2021, partially offset by the impact of the retirement of our 4.90% unsecured senior notes in July 2022. See note 14 of the notes to consolidated financial statements included under Item 8 for further details regarding the retirement of our senior long-term debt.

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Net Foreign Exchange Gains

Net foreign exchange gains included in net income (loss) were $140.2 million in 2022 compared to $72.3 million in 2021. Net foreign exchange gains are primarily due to the remeasurement of our foreign currency denominated insurance reserves to the U.S. Dollar. The U.S. Dollar strengthened against the Euro and British Pound, the predominant foreign currencies within our insurance operations, during 2022 and 2021, particularly in the second and third quarters of 2022. Pre-tax net foreign exchange losses attributed to changes in exchange rates on available-for-sale securities supporting our insurance reserves, which are included in the changes in net unrealized gains (losses) on available-for-sale investments in other comprehensive loss, were $79.5 million in 2022 compared to $78.0 million in 2021.

Income Taxes

The effective tax rate was 32% in 2022 compared to 22% in 2021. The effective tax rate for 2022 differs from the effective tax rate for 2021, and the statutory rate of 21%, due to the impact of various immaterial items resulting in a net tax benefit that was magnified due to the small pre-tax loss in 2022. See note 15 of the notes to consolidated financial statements included under Item 8 for further discussion of our income taxes.

In August 2022, the U.S. enacted the Inflation Reduction Act of 2022 (the Act). The Act implements a 15% corporate minimum tax based on adjusted financial statement income and a 1% excise tax on stock repurchases effective January 1, 2023. We do not expect these tax law changes to have a material impact on our results of operations, financial condition or cash flows, however, we will continue to evaluate the impact of the Act as additional guidance is issued by the U.S. Treasury.

Comprehensive Income (Loss) to Shareholders and Book Value per Common Share

The following table summarizes the components of comprehensive income (loss) to shareholders.

	Years Ended December 31,
(dollars in thousands)	2022		2021
Net income (loss) to shareholders	$	(214,123)	$	2,425,003
Other comprehensive loss:
Change in net unrealized gains (losses) on available-for-sale investments, net of taxes	(1,110,148)		(354,938)
Other, net of taxes	15,471		8,177
Other comprehensive (income) loss attributable to noncontrolling interest	(17)		2
Other comprehensive loss to shareholders	(1,094,694)		(346,759)
Comprehensive income (loss) to shareholders	$	(1,308,817)	$	2,078,244

Book value per common share decreased 10% from $1,036.20 at December 31, 2021 to $929.27 as of December 31, 2022, primarily due to other comprehensive loss to shareholders in 2022.

Liquidity and Capital Resources

We seek to maintain prudent levels of liquidity and financial leverage for the protection of our policyholders, creditors and shareholders. Our consolidated debt to capital ratio was 24% at December 31, 2022 and 23% at December 31, 2021. The increase reflects a decrease in shareholders' equity, primarily attributable to a decline in the fair value of our investment portfolio, driven by unfavorable movements in the public equity markets and increases in interest rates in 2022.

Holding Company

Our holding company had $3.7 billion and $5.3 billion of investments, cash and cash equivalents and restricted cash and cash equivalents (invested assets) at December 31, 2022 and December 31, 2021, respectively. The decrease in holding company invested assets was primarily due to capital contributions made to our insurance subsidiaries and a decline in the fair value of the holding company investment portfolio, as well as the $350.0 million repayment of our 4.90% unsecured senior notes due July 1, 2022. See note 23 of the notes to consolidated financial statements included under Item 8 for condensed financial information for our holding company.

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Within our insurance subsidiaries, we seek to maintain capital that significantly exceeds required capital levels, as prescribed by applicable regulators. A portion of the capital held by many of our insurance subsidiaries includes a portfolio of equity securities, and the unfavorable movements in the public equity markets in 2022 had a significant impact on their investment portfolio valuations, and in turn, the capital within these entities. In order to maintain our target levels of excess capital within the impacted insurance subsidiaries, our holding company made capital contributions totaling $973.5 million in 2022. There were no capital contributions from our holding company to our insurance subsidiaries in 2021. We also received dividends totaling $130.0 million from certain of our insurance subsidiaries in 2022 compared to $1.0 billion in 2021.

The following table presents the composition of our holding company's invested assets.

	December 31,
	2022		2021
Fixed maturity securities	4	%	4	%
Equity securities	40	%	53	%
Short-term investments, cash and cash equivalents and restricted cash and cash equivalents	56	%	43	%
Total	100	%	100	%

After satisfying our interest and principal obligations on our senior long-term debt and notes payable to subsidiaries, as well as any other holding company obligations, excess liquidity at Markel Corporation is available to, among other things, allocate capital to our existing businesses, complete acquisitions, build our portfolio of equity securities or repurchase shares of our common stock.

In February 2022, our Board of Directors approved a new share repurchase program that provides for the repurchase of up to $750 million of common stock. As of December 31, 2022, $511.7 million remained available for repurchases under the program. This share repurchase program has no expiration date but may be terminated by the Board of Directors at any time.

We may from time to time seek to prepay, retire or repurchase our outstanding senior notes or preferred shares, through open market purchases, privately negotiated transactions or otherwise. Those prepayments, retirements or repurchases, if any, will depend on prevailing market conditions, our liquidity requirements, contractual restrictions and other factors.

The holding company relies on dividends from its subsidiaries to meet debt service obligations and pay dividends on our preferred stock. Under the insurance laws of the various states in which our domestic insurance subsidiaries are incorporated, an insurer is restricted in the amount of dividends it may pay without prior approval of regulatory authorities. There are also regulatory restrictions on the amount of dividends that certain of our foreign subsidiaries may pay based on applicable laws in their respective jurisdictions. At December 31, 2022, our domestic insurance subsidiaries and Markel Bermuda Limited could pay ordinary dividends of $1.1 billion during the following twelve months under these laws.

We maintain a corporate revolving credit facility, which provides up to $300 million of capacity for future acquisitions, investments and stock repurchases and for other working capital and general corporate purposes. At our discretion, up to $200 million of the total capacity may be used for letters of credit. We may increase the capacity of the facility by up to $200 million subject to obtaining commitments for the increase and certain other terms and conditions. This facility expires in April 2024. As of December 31, 2022 and 2021, there were no borrowings outstanding under this revolving credit facility.

We were in compliance with all covenants contained in our corporate revolving credit facility at December 31, 2022. To the extent that we are not in compliance with our covenants, access to the revolving credit facility could be restricted. While we believe this to be unlikely, the inability to access the revolving credit facility could adversely affect our liquidity. See note 14 of the notes to consolidated financial statements included under Item 8 for further discussion of our revolving credit facility.

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We have access to various capital sources, including dividends from certain of our subsidiaries, holding company invested assets, undrawn capacity under our revolving credit facility and access to the debt and equity capital markets. We believe we have adequate liquidity to meet our capital and operating needs, including that which may be required to support the operating needs of our subsidiaries. However, the availability of these sources of capital and the availability and terms of future financings will depend on a variety of factors. See the "Access to Capital" risk factors under Item 1A Risk Factors for more discussion regarding our access to capital sources.

Cash Flows and Invested Assets

Net cash provided by operating activities was $2.7 billion in 2022 compared to $2.3 billion in 2021. The increase in net cash flows from operating activities for the year ended December 31, 2022 was primarily due to higher net premiums within our Insurance segment, partially offset by $101.9 million of payments made in connection with the Markel CATCo buy-out transaction.

Net cash used by investing activities was $1.7 billion in 2022 compared to $2.9 billion in 2021. In 2022, net cash used by investing activities included net purchases of fixed maturity securities, short-term investments and equity securities of $959.7 million, $846.0 million and $201.0 million, respectively. Net cash used by investing activities was net of $630.0 million of net cash and restricted cash acquired as part of our consolidation of Markel CATCo Re, of which $169.4 million was subsequently distributed to Markel CATCo investors for shares that were redeemed in conjunction with the buy-out transaction. In 2021, net cash used by investing activities included net purchases of fixed maturity and equity securities of $2.5 billion and $54.9 million, respectively, and net sales of short-term investments of $229.0 million. Net cash used by investing activities in 2021 also included $510.9 million of net cash used for the acquisitions of Buckner and Metromont.

In 2022, as interest rates began to rise, we increased our allocation of cash to short-term investments and fixed maturity securities to support our growing underwriting business. Additionally, we increased our purchases of equity securities in 2022 to take advantage of favorable prices following declines in the public equity markets during the year. Cash flow from investing activities is affected by various factors such as anticipated payment of claims, financing activity, acquisition opportunities and individual buy and sell decisions made in the normal course of our investment portfolio management.

Invested assets were $27.4 billion at December 31, 2022 compared to $28.3 billion at December 31, 2021, reflecting a decrease of 3% in 2022. The decline in the fair value of our investment portfolio, driven by unfavorable movements in the public equity markets and increases in interest rates in 2022, was partially offset by cash provided by operating activities. These factors were also the primary drivers of the change in the composition of our investment portfolio. The following table presents the composition of our invested assets.

	December 31,
	2022		2021
Fixed maturity securities	43	%	44	%
Equity securities	28	%	32	%
Short-term investments, cash and cash equivalents and restricted cash and cash equivalents	29	%	24	%
Total	100	%	100	%

Net cash used by financing activities was $595.3 million in 2022, which included $350.0 million to retire our 4.90% unsecured senior notes due July 1, 2022. Financing activities in 2022 also reflected borrowings and repayments at certain our Markel Ventures businesses, primarily on revolving lines of credit. Net cash provided by financing activities was $369.8 million in 2021, which included net proceeds of $591.4 million from our May 2021 senior notes offering. Cash of $290.8 million and $206.5 million was used to repurchase shares of our common stock during 2022 and 2021, respectively.

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Cash Obligations

As of December 31, 2022, our primary cash obligations were unpaid losses and loss adjustment expenses, senior long-term debt and other debt and related interest payments, life and annuity benefits and lease liabilities. These cash obligations, as presented in the following table, represent our estimate of total future cash payments and may differ from the corresponding liabilities on our consolidated balance sheet due to present value discounts and other adjustments required for presentation in accordance with U.S. GAAP. The following table summarizes our estimated contractual cash obligations at December 31, 2022 and the estimated amount expected to be paid in 2023.

(dollars in thousands)	Total cash obligations as of December 31, 2022		Cash obligations due in less than 1 year
Unpaid losses and loss adjustment expenses (1)	$	21,053,737	$	4,494,980
Senior long-term debt and other debt (2)	$	4,148,007	$	399,604
Interest payments on senior long-term debt and other debt (3)	$	3,414,263	$	169,263
Life and annuity benefits (4)	$	974,212	$	58,650
Lease liabilities (5)	$	661,112	$	100,887

(1)    The actual cash payments for settled claims will vary, possibly significantly, from these estimates. As of December 31, 2022, the average duration of our reserves for unpaid losses and loss adjustment expenses was 3.8 years. See note 11 of the notes to consolidated financial statements included under Item 8 for further details on our loss reserve estimates.

(2)    See note 14 of the notes to consolidated financial statements included under Item 8 for further details on the scheduled maturity of principal payments on our senior long-term debt and other debt.

(3)    Interest expense is accrued in the period incurred and therefore, only a portion of the future interest payments presented in this table represents a liability on our consolidated balance sheet as of December 31, 2022.

(4)    There is inherent uncertainty in the process of estimating the timing of payments for life and annuity benefits and actual cash payments for settled contracts could vary significantly from these estimates. We expect $704.1 million of our cash obligation for life and annuity benefits to be paid beyond five years. See note 13 of the notes to consolidated financial statements included under Item 8 for further details on our estimates for life and annuity benefit reserves.

(5)    See note 9 of the notes to consolidated financial statements included under Item 8 for further details on our lease obligations and the expected timing of future payments.

Various of our Markel Ventures subsidiaries maintain revolving credit facilities or lines of credit, which provide up to $620 million of aggregate capacity for working capital and other general operational purposes. A portion of the capacity on certain of these credit facilities may be used as security for letters of credit and other obligations. At December 31, 2022 and 2021, $238.1 million and $94.3 million, respectively, of borrowings were outstanding under these credit facilities.

As of December 31, 2022, one of our Markel Ventures subsidiaries was not in compliance with certain financial covenants of its revolving credit facility, which had an outstanding balance of $97.9 million as of December 31, 2022. The subsidiary is working with its lenders and anticipates amending the facility. This event is not expected to have a material effect on our consolidated financial condition or results of operations. At December 31, 2022, all of our other subsidiaries were in compliance with all covenants contained in their respective credit facilities. To the extent our subsidiaries are not in compliance with their respective covenants, access to their credit facilities could be restricted, which could adversely affect their operations. See note 14 of the notes to consolidated financial statements included under Item 8 for further discussion of our credit facilities.

Restricted Assets and Capital

At December 31, 2022, we had $4.8 billion of invested assets held in trust or on deposit for the benefit of policyholders or ceding companies or to support underwriting activities. Additionally, we have pledged investments and cash and cash equivalents totaling $437.8 million at December 31, 2022 as security for letters of credit that have been issued by various banks on our behalf. These invested assets and the related liabilities are included in our consolidated balance sheet. See note 4(f) of the notes to consolidated financial statements included under Item 8 for further discussion of restrictions over our invested assets.

Our insurance operations require capital to support premium writings, and we remain committed to maintaining adequate capital and surplus at each of our insurance subsidiaries. The National Association of Insurance Commissioners (NAIC) developed a model law and risk-based capital formula designed to help regulators identify domestic property and casualty insurers that may be inadequately capitalized. Under the NAIC's requirements, a domestic insurer must maintain total capital and surplus above a calculated threshold or face varying levels of regulatory action. Capital adequacy of our foreign insurance

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subsidiaries is regulated by applicable laws of the United Kingdom, Bermuda and Germany. At December 31, 2022, the capital and surplus of each of our insurance subsidiaries significantly exceeded the amount of statutory capital and surplus necessary to satisfy regulatory requirements.

Critical Accounting Estimates

Critical accounting estimates are those estimates that both are important to the portrayal of our financial condition and results of operations and require us to exercise significant judgment. The preparation of financial statements in accordance with U.S. GAAP requires us to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenues and expenses and the disclosure of material contingent assets and liabilities. These estimates, by necessity, are based on assumptions about numerous factors. Actual results may differ materially from the estimates and assumptions used in preparing the consolidated financial statements. Our accounts with accounting policies that involve critical accounting estimates are unpaid losses and loss adjustment expenses and goodwill and intangible assets.

Unpaid Losses and Loss Adjustment Expenses

Our consolidated balance sheets included estimated unpaid losses and loss adjustment expenses of $20.9 billion and reinsurance recoverables on unpaid losses of $8.0 billion at December 31, 2022 compared to $18.2 billion and $6.9 billion, respectively, at December 31, 2021. Included in these balances were unpaid losses and loss adjustment expenses and reinsurance recoverables on unpaid losses attributable to our program services business and other fronting arrangements totaling $5.2 billion for the year ended December 31, 2022 and $4.2 billion for the year ended December 31, 2021. Additionally, consolidated unpaid losses and loss adjustment expenses as of December 31, 2022 included $347.9 million of fully collateralized reserves attributable to Markel CATCo Re, which we consolidate following the Markel CATCo buy-out. See note 17 of the notes to consolidated financial statements for further details regarding the consolidation of Markel CATCo Re. Our consolidated balance sheets do not include reserves for losses and loss adjustment expenses attributed to unconsolidated subsidiaries or affiliates that we manage through our Nephila insurance-linked securities operations.

We accrue liabilities for unpaid losses and loss adjustment expenses based upon estimates of the ultimate amounts payable. We maintain reserves for specific claims incurred and reported (case reserves) and reserves for claims incurred but not reported (IBNR reserves).

Reported claims are in various stages of the settlement process, and the corresponding reserves for reported claims are based upon all information available to us. Case reserves consider our estimate of the ultimate cost to settle the claims, including investigation and defense of lawsuits resulting from the claims, and may be subject to adjustment for differences between costs originally estimated and costs subsequently re-estimated or incurred. Claims are settled based upon their merits, and some claims may take years to settle, especially if legal action is involved. As of any balance sheet date, all claims have not yet been reported, and some claims may not be reported for many years. As a result, the liability for unpaid losses and loss adjustment expenses includes significant estimates for incurred but not reported claims.

There is normally a time lag between when a loss event occurs and when it is reported to us. The actuarial methods that we use to estimate losses have been designed to address the lag in loss reporting as well as the delay in obtaining information that would allow us to more accurately estimate future payments. There is also often a time lag between cedents establishing case reserves or re-estimating their reserves and notifying us of those new or revised case reserves. As a result, the reporting lag is more pronounced in our reinsurance contracts than in our insurance contracts. On reinsurance transactions, the reporting lag will generally be 60 to 90 days after the end of a reporting period but can be longer in some cases. There may also be a more pronounced reporting lag, as well as reliance on third-party claims handling practices and reserve estimates, on insurance contracts for which we are not the primary insurer and participate only in excess layers of loss. Based on the experience of our actuaries and management, we select loss development factors and trending techniques to mitigate the difficulties caused by reporting lags. At least annually, we evaluate our loss development factors and trending assumptions using our own loss data, as well as cedent-specific and industry data, and update them as needed.

U.S. GAAP requires that IBNR reserves be based on the estimated ultimate cost of settling claims, including the effects of inflation and other social and economic factors, using past experience adjusted for current trends and any other factors that would modify past experience. IBNR reserves are calculated by subtracting paid losses and loss adjustment expenses and case reserves from estimated ultimate losses and loss adjustment expenses. IBNR reserves were 70% of total unpaid losses and loss adjustment expenses at December 31, 2022 compared to 67% at December 31, 2021.

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The following table summarizes case reserves and IBNR reserves for our underwriting, program services and other fronting operations, which excludes $347.9 million of fully collateralized reserves attributable to Markel CATCo Re as of December 31, 2022. The amounts in the following table exclude the unamortized portion of any fair value adjustments for unpaid losses and loss adjustment expenses assumed in conjunction with an acquisition and any adjustments to discount reserves.

(dollars in thousands)	Insurance		Reinsurance		Other underwriting		Program services and other fronting			Total
December 31, 2022
Case reserves	$	3,361,400	$	1,234,852	$	70,072	$	1,617,473		$	6,283,797
IBNR reserves	8,238,051		2,406,235		127,531		3,586,817			14,358,634
Total	$	11,599,451	$	3,641,087	$	197,603	$	5,204,290	(1)	$	20,642,431
December 31, 2021
Case reserves	$	3,093,576	$	1,334,444	$	53,317	$	1,485,857		$	5,967,194
IBNR reserves	6,951,347		2,369,313		218,039		2,730,477			12,269,176
Total	$	10,044,923	$	3,703,757	$	271,356	$	4,216,334	(1)	$	18,236,370

(1)    Substantially all of the premium written in our program services and other fronting business is ceded, resulting in reinsurance recoverables on unpaid losses of $5.2 billion and $4.2 billion as of December 31, 2022 and 2021, respectively.

Each quarter, our actuaries prepare estimates of the ultimate liability for unpaid losses and loss adjustment expenses based on established actuarial methods. Management reviews these estimates, supplements the actuarial analyses with information provided by claims, underwriting and other operational personnel and determines its best estimate of loss reserves, which is recorded in our consolidated financial statements. Our procedures for determining the adequacy of loss reserves at the end of the year are substantially similar to the procedures applied at the end of each interim period.

Any adjustments to reserves resulting from our interim or year-end reviews, including changes in estimates, are recorded as a component of losses and loss adjustment expenses in the period of the change. Reserve changes that increase previous estimates of ultimate claims cost are referred to as unfavorable or adverse development, or reserve strengthening. Reserve changes that decrease previous estimates of ultimate claims cost are referred to as favorable development.

Program Services and Other Fronting

For our program services business and other fronting arrangements, case reserves are generally established based on reports received from the general agents or reinsurers with whom we do business. Our actuaries review the case loss reserve data received for sufficiency, consistency with historical data and for consistency with other programs we write that have similar characteristics. Ultimate losses and loss adjustment expenses are calculated using either our program experience or, where the program data is not credible, industry experience for similar products or lines of business. Substantially all of the premium written in our program services business and other fronting arrangements is ceded, and net reserves for unpaid losses and loss adjustment expenses as of December 31, 2022 and December 31, 2021 were $10.0 million and $11.6 million, respectively.

Underwriting

For our insurance operations, we are generally notified of insured losses by our insureds, their brokers or the primary insurer in instances in which we participate in excess layers of insured losses on a contract. Based on this information, we establish case reserves by estimating the expected ultimate losses from the claim (including any administrative or legal costs associated with settling the claim). Our claims personnel use their knowledge of the policy provisions and details specific to the claim, along with information provided by internal and external experts, including underwriters, actuaries and legal counsel, to estimate the expected ultimate losses.

For our reinsurance operations, case reserves are generally established based on reports received from ceding companies or their brokers. For excess of loss contracts, we are typically notified of insurance losses on specific contracts and record a case reserve for the estimated expected ultimate losses from the claim. For quota share contracts, we typically receive aggregated claims information and record a case reserve based on that information. As with insurance business, we evaluate this information and estimate the expected ultimate losses.

Our liabilities for unpaid losses and loss adjustment expenses can generally be categorized into two distinct groups, short-tail business and long-tail business. Short-tail business refers to lines of business, such as property, accident and health,

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automobile, watercraft and marine hull exposures, for which losses are usually known and paid shortly after the loss actually occurs. Long-tail business describes lines of business for which specific losses take much longer to emerge and may not be known and reported for some time. Given the time frame over which long-tail exposures are ultimately settled, there is greater uncertainty and volatility in these lines than in short-tail lines of business. Our long-tail coverages consist of most casualty lines, including professional liability, products liability, general and excess liability and excess and umbrella exposures, as well as workers' compensation insurance, which have been a significant source growth in premium volume in recent years. Some factors that contribute to the uncertainty and volatility of long-tail business, and thus require a significant degree of judgment in the reserving process, include the effects of unanticipated levels of economic inflation, the impact of social inflation, the inherent uncertainty as to the length of reporting and payment development patterns, the possibility of judicial interpretations or legislative changes, including changes in workers' compensation benefit laws, that might impact future loss experience relative to prior loss experience and the potential lack of comparability of the underlying data used in performing loss reserve analyses.

Our ultimate liability may be greater or less than current reserves. Changes in our estimated ultimate liability for loss reserves generally occur as a result of the emergence of unanticipated loss activity, the completion of specific actuarial or claims studies or changes in internal or external factors. We closely monitor new information on reported claims and use statistical analyses prepared by our actuaries to evaluate the adequacy of our recorded reserves. We are required to exercise considerable judgment when assessing the relative credibility of loss development trends. Our philosophy is to establish loss reserves that are more likely redundant than deficient. This means that we seek to establish loss reserves that will ultimately prove to be adequate. As a result, if new information or trends indicate an increase in frequency or severity of claims in excess of what we initially anticipated, we generally respond quickly and increase loss reserves. If, however, frequency or severity trends are more favorable than initially anticipated, we often wait to reduce our loss reserves until we can evaluate experience in additional periods to confirm the credibility of the trend. In addition, for long-tail lines of business, trends develop over longer periods of time, and as a result, we give credibility to these trends more slowly than for short-tail or less volatile lines of business.

In establishing our liabilities for unpaid losses and loss adjustment expenses, our actuaries estimate an ultimate loss ratio, by accident year or underwriting year, for each of our product lines with input from our underwriting and claims personnel. For product lines in which loss reserves are established on a underwriting year basis, we have developed a methodology to convert from underwriting year to accident year for financial reporting purposes. In estimating an ultimate loss ratio for a particular line of business, our actuaries may use one or more actuarial reserving methods and select from these a single point estimate. To varying degrees, these methods include detailed statistical analysis of past claim reporting, settlement activity, claim frequency and severity, policyholder loss experience, industry loss experience and changes in market and economic conditions, policy forms and exposures. The actuarial methods we use include:

Initial Expected Loss Ratio Method – This method multiplies earned premiums by an expected loss ratio. The expected loss ratio is selected utilizing industry data, our historical data, frequency-severity and rate level forecasts and professional judgment.

Paid Loss Development – This method uses historical loss payment patterns to estimate future loss payment patterns. Our actuaries use the historical loss patterns to develop factors that are applied to current paid loss amounts to calculate expected ultimate losses.

Incurred Loss Development – This method uses historical loss reporting patterns to estimate future loss reporting patterns. Our actuaries use the historical loss patterns to develop factors that are applied to current reported losses to calculate expected ultimate losses.

Bornhuetter-Ferguson Paid Loss Development – This method divides the projection of ultimate losses into the portion that has already been paid and the portion that has yet to be paid. The portion that has yet to be paid is estimated as the product of three amounts: the premium earned for the exposure period, the expected loss ratio and the estimated percentage of ultimate losses that are still unpaid. The expected loss ratio is selected by considering historical loss ratios, adjusted for any known changes in pricing, loss trends, adequacy of case reserves, changes in administrative practices and other relevant factors.

Bornhuetter-Ferguson Incurred Loss Development – This method is identical to the Bornhuetter-Ferguson paid loss development method, except that it uses the estimated percentage of ultimate losses that are still unreported, instead of the estimated percentage of ultimate losses that are still unpaid.

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Frequency/Severity – Under this method, expected ultimate losses are equal to the product of the expected ultimate number of claims and the expected ultimate average cost per claim. Our actuaries use historical reporting patterns and severity patterns to develop factors that are applied to the current reported amounts to calculate expected ultimate losses.

Other Methods – There are certain instances when traditional actuarial methods may not be appropriate for estimating unpaid losses and loss adjustment expenses. In these instances, we may employ other actuarial methods.

Each actuarial method has its own set of assumptions and its own strengths and limitations, with no one method being better than the others in all situations. Our actuaries select the reserving methods that they believe will produce the most reliable estimates for the class of business being evaluated. Greater judgment may be required when we introduce new product lines or when there have been changes in claims handling practices, as the statistical data available may be insufficient. In these instances, we may rely upon assumptions applied to similar lines of business, rely more heavily on industry experience, take into account changes in underwriting guidelines and risk selection or review the impact of changes in claims reserving practices with claims personnel. Greater judgment also may be required for product lines that experience a low frequency of high severity claims, particularly when we are reliant on third party case reserve estimates and claims handling practices. In these instances, we may perform detailed claims reviews, analyzing the characteristics of each individual claim, with input from both actuarial and claims personnel to assess the adequacy of the case and IBNR reserves on the underlying product line. Our claims personnel use their knowledge of the specific claims along with internal and external experts, to estimate the expected ultimate losses. While we use our best judgment in establishing our estimate for loss reserves, applying different assumptions and variables could lead to significantly different loss reserve estimates.

A key assumption in most actuarial analyses is that past development patterns will repeat themselves in the future, absent a significant change in internal or external factors that influence the ultimate cost of our unpaid losses and loss adjustment expenses. Our estimates reflect implicit and explicit assumptions regarding the potential effects of external factors, including economic and social inflation, judicial decisions, changes in law, general economic conditions and recent trends in these factors. Our actuarial analyses are based on statistical analysis but also consist of reviewing internal factors that are difficult to analyze statistically, including changes in underwriting and claims handling practices, as well as rate changes. In the London market, and where we act as a reinsurer or participate only in excess layers of insured losses, the timing and amount of information reported about underlying claims are in the control of third parties. This can also affect estimates and require re-estimation as new information becomes available.

We cannot estimate losses from widespread catastrophic events, such as hurricanes and earthquakes, as well as pandemics and wars, using the traditional actuarial methods previously described. In the initial months after a catastrophic event occurs, our actuaries estimate losses and loss adjustment expenses based on claims received to date, industry loss estimates and output from industry, broker and proprietary models, as well as analysis of our ceded reinsurance contracts. We may also perform detailed policy and reinsurance contract level reviews. The availability of data from these procedures varies depending on the timing of the event relative to the point at which we develop our estimate. We also consider loss experience on historical events that may have similar characteristics to the underlying event and current market conditions, including the level of economic inflation. Due to the inherent uncertainty in estimating such losses, these estimates are subject to variability, which increases with the severity and complexity of the underlying event. As additional claims are reported and paid, and industry loss estimates are revised, we incorporate this new information into our analysis and adjust our estimate of ultimate losses and loss adjustment expenses as appropriate.

Loss reserves are established at management's best estimate, which is developed using the actuarially calculated point estimate as the starting point. The actuarial point estimate represents our actuaries' estimate of the most likely amount that will ultimately be paid to settle the losses that have occurred at a particular point in time; however, there is inherent uncertainty in the point estimate as it is the expected value in a range of possible reserve estimates. In some cases, actuarial analyses, which are generally based on statistical analysis, cannot fully incorporate all of the subjective factors that affect development of losses. In other cases, management's perspective of these more subjective factors may differ from the actuarial perspective. Subjective factors influencing the development of management's best estimate include: the credibility and timeliness of claims and loss information received from cedents and other third parties, economic and social inflation, judicial decisions, changes in law, changes in underwriting or claims handling practices, general economic conditions, the risk of moral hazard and other current and developing trends within the insurance and reinsurance markets, including the effects of competition. For example, our loss experience in recent years has reflected higher than anticipated levels of economic inflation, as well as the impacts of social inflation.

In developing its best estimate of loss reserves, management's philosophy is to establish loss reserves that are more likely to be redundant rather than deficient, and therefore, will ultimately prove to be adequate. Management's approach to establishing

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loss reserves typically results in loss reserves that exceed the calculated actuarial point estimate. Management also considers the range, or variability, of reasonably possible loss outcomes determined by our actuaries when establishing its best estimate for loss reserves. The actuarial ranges represent our actuaries' estimate of a likely lowest amount and likely highest amount that could ultimately be paid to settle the losses that have occurred at a particular point in time. The range determinations are based on estimates and actuarial judgements and are intended to encompass reasonably likely changes in one or more of the factors that were used to determine the point estimates. Using statistical models, our actuaries establish a range of reasonable reserve estimates for each of our underwriting segments. Additionally, following an acquisition of insurance operations, acquired reserves initially are recorded at fair value, and therefore our recorded loss reserves may be closer to the actuarial point estimate until we build total loss reserves that are consistent with our historic level of confidence. Management's best estimate of net reserves for unpaid losses and loss adjustment expenses exceeded the actuarially calculated point estimate by $688.4 million, or 5.8%, at December 31, 2022, compared to $638.3 million, or 6.0%, at December 31, 2021.

The difference between management's best estimate and the actuarially calculated point estimate in both 2022 and 2021 is primarily associated with our long-tail business due to the subjective factors previously described that affect the development of losses. Certain subjective factors, particularly the credibility and timeliness of claims information, are more pronounced within our reinsurance operations, as previously discussed, and therefore, the percentage difference between management's best estimate and the actuarially calculated point estimate is more significant in our Reinsurance segment than our Insurance segment.

Loss frequency and loss severity are two key measures of loss activity that often result in adjustments to actuarial assumptions relative to ultimate loss reserve estimates. Loss frequency measures the number of claims per unit of insured exposure. When the number of newly reported claims is higher than anticipated, generally speaking, loss reserves are increased. Conversely, loss reserves are generally decreased when fewer claims are reported than expected. Loss severity measures the average size of a claim. When the average severity of reported claims is higher than originally estimated, loss reserves are typically increased. When the average claim size is lower than anticipated, loss reserves are typically decreased.

Our underwriting results in 2022 included $167.4 million of favorable development on prior years loss reserves compared to $479.8 million in 2021. In connection with our quarterly reviews of loss reserves in 2021, the actuarial methods we used exhibited a favorable trend on prior accident years. This trend was observed using statistical analysis of actual loss experience for prior years, particularly with regard to most of our long-tail books of business within the Insurance segment, including our general liability and professional liability product lines. Additionally, as loss reserves are recorded at management's best estimate, which is generally higher than the corresponding actuarially calculated point estimate, the initial reserves established by management are more likely to be redundant than deficient. As actual losses continued to be lower than anticipated in 2021, it became more likely that the underwriting results would prove to be better than originally estimated. Additionally, as most actuarial methods rely upon historical reporting patterns, the favorable trends experienced on earlier accident years resulted in a re-estimation of our ultimate incurred losses on more recent accident years. When we experience loss frequency or loss severity trends that are more favorable than we initially anticipated, we often evaluate the loss experience over a period of several years in order to assess the relative credibility of loss development trends. In 2021, based upon our evaluations of claims development patterns in our long-tail, and often volatile, lines of business, our actuaries reduced their estimates of ultimate losses. Management also gave greater credibility to the favorable trends experienced on earlier accident years, and upon incorporating these favorable trends into its best estimate, we reduced prior years loss reserves on more recent accident years accordingly.

Favorable development in 2022 was net of $70.9 million of adverse development on our professional liability and general liability product lines within our Insurance segment, where the favorable claims and loss trends observed in 2021, and other recent years, were disrupted. Adverse development on these product lines was primarily attributable to unfavorable claim settlements and increased claim frequency and severity on the 2018 and 2019 accident years within our professional liability product lines and the 2016 to 2019 accident years within our general liability product lines. The adverse development on these accident years was across a number of products, including directors and officers, errors and omissions and employment practices liability within professional liability and contractors and excess and umbrella within general liability. Development on prior years loss reserves within our professional liability and general liability product lines in 2022 for these accident years was impacted by broader market conditions, including the effects of economic and social inflation. The impacts of social inflation were most significant on our large, risk-managed excess professional liability accounts, corresponding with a notable rise in the number of class action lawsuits on these years and the recent unfavorable legal environment. The development of this claims trend was influenced by state and federal court closures following the onset of the COVID-19 pandemic in 2020, which has delayed court proceedings for claims on the impacted product lines.

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These factors have created more uncertainty around the ultimate losses that will be incurred to settle claims on these longer-tail product lines. On our professional liability product lines, loss development reflected more favorable experience than originally anticipated on the 2020 and 2021 accident years in 2022, however, we are approaching reductions to prior year loss reserves on more recent accident years cautiously. Consistent with our reserving philosophy, we are responding quickly to increase loss reserves following any indication of increased claims frequency or severity in excess of our previous expectations, whereas in instances where claims trends are more favorable than we previously anticipated, we are often waiting to reduce loss reserves and will evaluate our experience over additional periods of time. Additionally, the actuarial methods we used indicated a continued favorable trend in loss frequency and severity on the 2015 and prior accident years for both our professional liability and general liability product lines. Management gave greater credibility to the favorable trend and reduced prior years loss reserves on these earlier accident years accordingly.

Favorable development on prior years loss reserves in 2022 also reflected favorable loss experience across several other product lines, most notably our property and workers' compensation lines of business. This included favorable development on our reserves for natural catastrophes that occurred in prior years, based on additional claims reporting and settlement activity in 2022. On our workers' compensation product line, the actuarial methods we used indicated a continued decline in the loss severity trend on prior accident years in 2022, consistent with our experience in recent years. As actual losses continued to be lower than anticipated in 2022, it became more likely that the underwriting results would prove to be better than originally estimated. Management gave greater credibility to the favorable trend experienced on earlier accident years and upon incorporating these favorable trends into its best estimate, reduced prior years loss reserves on more recent accident years accordingly. While we believe it is likely that there will be additional favorable development on prior years loss reserves in 2023, we caution readers not to place undue reliance on this favorable trend.

Changes in prior years loss reserves, including the trends and factors that impacted loss reserve development in 2022 and 2021, as well as further details regarding the historical development of reserves for losses and loss adjustment expenses and changes in methodologies and assumptions used to calculate reserves for unpaid losses and loss adjustment expenses are discussed in further detail in note 11 of the notes to consolidated financial statements included under Item 8.

The following table summarizes our reserves for net unpaid losses and loss adjustment expenses and the actuarially established high and low ends of a range of reasonable reserve estimates at December 31, 2022. This table excludes the fully collateralized reserves attributable to Markel CATCo Re. As described in note 11 of the notes to consolidated financial statements included under Item 8, unpaid losses and loss adjustment expenses attributable to acquisitions are recorded at fair value as of the acquisition date, which generally consists of the present value of the expected net loss and loss adjustment expense payments plus a risk premium. The net loss reserves presented in this table represent our estimated future payments for losses and loss adjustment expenses, whereas the reserves for unpaid losses and loss adjustment expenses included on the consolidated balance sheet include the unamortized portion of fair value adjustments recorded in conjunction with an acquisition.

(dollars in millions)	Net Loss Reserves Held		Low End of Actuarial     Range(1)		High End of Actuarial    Range(1)
Insurance	$	9,183.7	$	7,910.8	$	9,883.5
Reinsurance	$	3,303.4	$	2,642.1	$	3,688.4
Other underwriting	$	114.7	$	90.7	$	162.8

(1)    Due to the actuarial methods used to determine the separate ranges for each component of our business, it is not appropriate to aggregate the high or low ends of the separate ranges to determine the high and low ends of the actuarial range on a consolidated basis.

Undue reliance should not be placed on these ranges of estimates as they are only one of many points of reference used by management to determine its best estimate of ultimate losses. Further, actuarial ranges may not be a true reflection of the potential variability between loss reserves estimated at the balance sheet date and the ultimate cost of settling claims. Similar to the development of our estimate of ultimate losses, actuarial ranges are developed based on known events as of the valuation date, while ultimate paid losses are subject to events and circumstances that are unknown as of the valuation date.

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During the years ended December 31, 2022 and 2021, we experienced favorable development on prior years loss reserves of 1% and 5%, respectively, of beginning of year net loss reserves. The magnitude of our historical trend of favorable loss reserve development was disrupted in 2022 as a result of the emergence of multiple factors that impacted the claims and loss trends on certain of our professional liability and general liability product lines, which resulted in net adverse loss development on the 2016 to 2019 accident years. On other accident years within these long-tail product lines, claims trends in 2022 were more favorable than we previously anticipated. Additionally, some of the loss development factors observed in 2022 that disrupted our historical favorable trend, including the rise in class action lawsuits and delays in the court systems, are not expected to have as significant of an impact on more recent accident years on the affected product lines. Since 2019, we've experienced meaningful rate increases, tightened our terms and conditions, optimized our portfolio through underwriting action and risk selection, adjusted attachment points, managed limits and diversified our portfolios. However, the impacts of economic and social inflation, among other factors previously discussed, have also created more uncertainty around the ultimate losses that will be incurred to settle claims on our longer-tail product lines. As a result, we are approaching reductions to prior year loss reserves on more recent accident years cautiously. It is difficult for management to predict the duration and magnitude of a trend and, on a relative basis, it is even more difficult to predict the emergence of factors or trends that are unknown today but may have a material impact on loss reserve development. In assessing the likelihood of whether the trends previously discussed will continue and whether other trends may develop, we believe that a reasonably likely movement in prior years loss reserves during 2023 would range from adverse development of 2%, or $200 million, to favorable development of 6%, or $800 million, of December 31, 2022 net loss reserves.

Goodwill and Intangible Assets

Our consolidated balance sheet as of December 31, 2022 included goodwill and intangible assets of $4.4 billion as follows:

	December 31, 2022
(dollars in millions)	Underwriting		Markel Ventures		Other (1)		Total
Goodwill	$	894.4	$	1,153.9	$	590.5	$	2,638.8
Intangible assets	362.3		796.3		588.9		1,747.5
Total	$	1,256.7	$	1,950.2	$	1,179.4	$	4,386.3

(1)    Amounts included in Other reflect our operations that are not included in a reportable segment, including our insurance-linked securities operations and our program services operations.

Goodwill and intangible assets are recorded as a result of business acquisitions. Goodwill represents the excess of the amount paid to acquire a business over the net fair value of assets acquired and liabilities assumed at the date of acquisition. Indefinite-lived and other intangible assets are recorded at fair value as of the acquisition date. The determination of the fair value of certain assets acquired, including goodwill and intangible assets, and liabilities assumed involves significant judgment and the use of valuation models and other estimates, which require assumptions that are inherently subjective. During the year ended December 31, 2021, we recorded $497.7 million of goodwill and intangible assets in connection with acquisitions. We did not make any significant acquisitions during the year ended December 31, 2022. See note 3 of the notes to consolidated financial statements included under Item 8 for further details about recent acquisitions.

Intangible assets with definite lives are reviewed for impairment when events or circumstances indicate that their carrying value may not be recoverable. Goodwill and indefinite-lived intangible assets are tested for impairment annually, or when events or circumstances indicate that their carrying value may not be recoverable. A significant amount of judgment is required in performing impairment tests, including the optional assessment of qualitative factors for the annual impairment test, which is used to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount. This assessment serves as a basis for determining whether it is necessary to perform a quantitative impairment test.

We completed our annual tests for impairment as of October 1, 2022 based upon results of operations through September 30, 2022. We elected to perform a qualitative assessment for all of our reporting units, with the exception of our Nephila reporting unit, for which we performed a quantitative assessment.

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When performing our qualitative assessments, we considered macroeconomic factors such as industry conditions and market conditions. We also considered reporting unit-specific events, actual financial performance versus expectations and management's future business expectations, as well as the amount by which the fair value of the reporting unit exceeded its carrying value at the date of the last quantitative assessment. As part of our qualitative assessment of recently acquired reporting units with material goodwill, we considered the fact that the businesses had been acquired in orderly transactions between market participants, and our purchase price represented fair value at acquisition. For recent acquisitions for which we elected to perform a qualitative assessment, there were no events since acquisition that had a significant adverse impact on the fair value of these reporting units through the assessment date. Based on the results of our qualitative assessments, we believe it is more likely than not that the fair value of each of the assessed reporting units exceeded its respective carrying amount as of the assessment date and December 31, 2022 and none of the assessed reporting units are at risk of a material impairment of goodwill. We considered similar factors to determine if there were any indicators requiring an assessment of the recoverability of our definite lived intangible assets and concluded there were not. However, deterioration of market conditions related to the general economy or the specific industries in which we operate, a sustained trend of weaker than anticipated financial performance within a reporting unit beyond that which we considered or included in our assessments, or further increases in the market-based weighted average cost of capital, among other factors, could impact the impairment analysis and may result in future goodwill or intangible asset impairment charges. See the risk factor titled "Impairment in the value of our goodwill or other intangible assets could have a material adverse effect on our operating results and financial condition" within Item 1A Risk Factors for further discussion of risks associated with our goodwill and intangible assets.

We performed a quantitative impairment assessment for our Nephila reporting unit, which resulted in an $80.0 million impairment of goodwill. We acquired our Nephila operations in 2018 at which time they were recorded at fair value. The Nephila reporting unit serves as an insurance and investment fund manager that offers a broad range of investment products, including insurance-linked securities, catastrophe bonds, insurance swaps and weather derivatives. Nephila receives management fees for these services primarily based on the net asset value of the accounts managed and, for certain funds, incentive fees based on their annual performance. Prior to its sale in February 2022, this reporting unit also included our Velocity managing general agent operations.

We estimated the fair value of our Nephila reporting unit primarily using an income approach based on a discounted cash flow model. The cash flow projections used in the discounted cash flow model included management's best estimate of future growth and margins. The discount rates used to determine the fair value estimates were developed based on a capital asset pricing model using market-based inputs as well as an assessment of the inherent risk in projected future cash flows. Our fair value estimate was negatively impacted by an increase in our discount rate assumption in 2022, reflecting the increased cost of capital due to rising interest rates throughout 2022.

Since acquiring Nephila, investment performance in the broader ILS market has been adversely impacted by consecutive years of elevated catastrophe losses, most recently with Hurricane Ian in 2022. These events, as well as recent volatility in the capital markets, have impacted investor decisions around allocation of capital to ILS, which in turn has impacted our capital raises and redemptions within the funds we manage. Following Hurricane Ian, we have seen more favorable rates on the reinsurance contracts to which the Nephila Reinsurers subscribe, which is reflective of the current property catastrophe market and had a positive impact on Nephila's growth and performance projections. However, the impact of this favorable trend was more than offset by the impact of further declines in investor capital within the funds we manage. Our cash flow assumptions reflect management's best estimate of the reporting unit's future cash flows, based on information currently available, however, these assumptions are inherently uncertain, require a high degree of estimation and judgment and are subject to change depending on the outcome of future events.

Based on the result of our quantitative assessment, the carrying value of our Nephila reporting unit exceeded the estimated fair value of the reporting unit by $80.0 million resulting in a corresponding impairment of goodwill. This reduced the goodwill of the Nephila reporting unit to $221.8 million. We also evaluated our intangible assets within the Nephila reporting unit for impairment and determined they were not impaired.

Safe Harbor and Cautionary Statement

This report contains statements concerning or incorporating our expectations, assumptions, plans, objectives, future financial or operating performance and other statements that are not historical facts. These statements are "forward-looking statements" within the meaning of the Private Securities Litigation Reform Act of 1995. Such statements may use words such as "anticipate," "believe," "estimate," "expect," "intend," "predict," "project" and similar expressions as they relate to us or our management.

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There are risks and uncertainties that may cause actual results to differ materially from predicted results in forward-looking statements. Factors that may cause actual results to differ are often presented with the forward-looking statements themselves. Additional factors that could cause actual results to differ from those predicted are set forth under Item 1 Business, Item 1A Risk Factors, Item 7 Management's Discussion and Analysis of Financial Condition and Results of Operations and Item 7A Quantitative and Qualitative Disclosures About Market Risk in this report or are included in the items listed below:

•our expectations about future results of our underwriting, investing, Markel Ventures and other operations are based on current knowledge and assume no significant man-made or natural catastrophes, no significant changes in products or personnel and no adverse changes in market conditions;

•the effect of cyclical trends on our underwriting, investing, Markel Ventures and other operations, including demand and pricing in the insurance, reinsurance and other markets in which we operate;

•actions by competitors, including the use of technology and innovation to simplify the customer experience, increase efficiencies, redesign products, alter models and effect other potentially disruptive changes in the insurance industry, and the effect of competition on market trends and pricing;

•our efforts to develop new products, expand in targeted markets or improve business processes and workflows may not be successful and may increase or create new risks (e.g., insufficient demand, change to risk exposures, distribution channel conflicts, execution risk, increased expenditures);

•the frequency and severity of man-made and natural catastrophes (including earthquakes, wildfires and weather-related catastrophes) may exceed expectations, are unpredictable and, in the case of wildfires and weather-related catastrophes, may be exacerbated if, as many forecast, changing conditions in the climate, oceans and atmosphere result in increased hurricane, flood, drought or other adverse weather-related activity;

•we offer insurance and reinsurance coverage against terrorist acts in connection with some of our programs, and in other instances we are legally required to offer terrorism insurance; in both circumstances, we actively manage our exposure, but if there is a covered terrorist attack, we could sustain material losses;

•emerging claim and coverage issues, changing industry practices and evolving legal, judicial, social and other environmental trends or conditions, can increase the scope of coverage, the frequency and severity of claims and the period over which claims may be reported; these factors, as well as uncertainties in the loss estimation process, can adversely impact the adequacy of our loss reserves and our allowance for reinsurance recoverables;

•reinsurance reserves are subject to greater uncertainty than insurance reserves, primarily because of reliance upon the original underwriting decisions made by ceding companies and the longer lapse of time from the occurrence of loss events to their reporting to the reinsurer for ultimate resolution;

•inaccuracies (whether due to data error, human error or otherwise) in the various modeling techniques and data analytics (e.g., scenarios, predictive and stochastic modeling, and forecasting) we use to analyze and estimate exposures, loss trends and other risks associated with our insurance and insurance-linked securities businesses could cause us to misprice our products or fail to appropriately estimate the risks to which we are exposed;

•changes in the assumptions and estimates used in establishing reserves for our life and annuity reinsurance book (which is in runoff), for example, changes in assumptions and estimates of mortality, longevity, morbidity and interest rates, could result in material changes in our estimated loss reserves for such business;

•adverse developments in insurance coverage litigation or other legal or administrative proceedings could result in material increases in our estimates of loss reserves;

•initial estimates for catastrophe losses and other significant, infrequent events (such as the COVID-19 pandemic and the Russia-Ukraine conflict), are often based on limited information, are dependent on broad assumptions about the nature and extent of losses, coverage, liability and reinsurance, and those losses may ultimately differ materially from our expectations;

•changes in the availability, costs, quality and providers of reinsurance coverage, which may impact our ability to write or continue to write certain lines of business or to mitigate the volatility of losses on our results of operations and financial condition;

•the ability or willingness of reinsurers to pay balances due may be adversely affected by industry and economic conditions, deterioration in reinsurer credit quality and coverage disputes, and collateral we hold, if any, may not be sufficient to cover a reinsurer's obligation to us;

•after the commutation of ceded reinsurance contracts, any subsequent adverse development in the re-assumed loss reserves will result in a charge to earnings;

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•regulatory actions can impede our ability to charge adequate rates and efficiently allocate capital;

•general economic and market conditions and industry specific conditions, including extended economic recessions or expansions; prolonged periods of slow economic growth; inflation or deflation; fluctuations in foreign currency exchange rates, commodity and energy prices and interest rates; volatility in the credit and capital markets; and other factors;

•economic conditions, actual or potential defaults in corporate bonds, municipal bonds, mortgage-backed securities or sovereign debt obligations, volatility in interest and foreign currency exchange rates and changes in market value of concentrated investments can have a significant impact on the fair value of our fixed maturity securities and equity securities, as well as the carrying value of our other assets and liabilities, and this impact may be heightened by market volatility and our ability to mitigate our sensitivity to these changing conditions;

•economic conditions may adversely affect our access to capital and credit markets;

•the effects of government intervention, including material changes in the monetary policies of central banks, to address financial downturns (such as in response to the COVID-19 pandemic), inflation and other economic and currency concerns;

•the impacts that political and civil unrest and regional conflicts, such as the conflict between Russia and Ukraine, may have on our businesses and the markets they serve or that any disruptions in regional or worldwide economic conditions generally arising from these situations may have on our businesses, industries or investments;

•the significant volatility, uncertainty and disruption caused by health epidemics and pandemics, including the COVID-19 pandemic and its variants, as well as governmental, legislative, judicial or regulatory actions or developments in response thereto;

•changes in U.S. tax laws, regulations or interpretations, or in the tax laws, regulations or interpretations of other jurisdictions in which we operate, and adjustments we may make in our operations or tax strategies in response to those changes;

•a failure or security breach of, or cyberattack on, enterprise information technology systems that we use or a failure to comply with data protection or privacy regulations;

•third-party providers may perform poorly, breach their obligations to us or expose us to enhanced risks;

•our acquisitions may increase our operational and internal control risks for a period of time;

•we may not realize the contemplated benefits, including cost savings and synergies, of our acquisitions;

•any determination requiring the write-off of a significant portion of our goodwill and intangible assets;

•the failure or inadequacy of any methods we employ to manage our loss exposures;

•the loss of services of any senior executive or other key personnel of our businesses could adversely impact one or more of our operations;

•the manner in which we manage our global operations through a network of business entities could result in inconsistent management, governance and oversight practices and make it difficult for us to implement strategic decisions and coordinate procedures;

•our substantial international operations and investments expose us to increased political, civil, operational and economic risks, including foreign currency exchange rate and credit risk;

•our ability to obtain additional capital for our operations on terms favorable to us;

•our compliance, or failure to comply, with covenants and other requirements under our credit facilities, senior debt and other indebtedness and our preferred shares;

•our ability to maintain or raise third-party capital for existing or new investment vehicles and risks related to our management of third-party capital;

•the effectiveness of our procedures for compliance with existing and future guidelines, policies and legal and regulatory standards, rules, laws and regulations;

•the impact of economic and trade sanctions and embargo programs on our businesses, including instances in which the requirements and limitations applicable to the global operations of U.S. companies and their affiliates are more restrictive than, or conflict with, those applicable to non-U.S. companies and their affiliates;

•regulatory changes, or challenges by regulators, regarding the use of certain issuing carrier or fronting arrangements;

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•our dependence on a limited number of brokers for a large portion of our revenues and third-party capital;

•adverse changes in our assigned financial strength, debt or preferred share ratings or outlook could adversely impact us, including our ability to attract and retain business, the amount of capital our insurance subsidiaries must hold and the availability and cost of capital;

•changes in the amount of statutory capital our insurance subsidiaries are required to hold, which can vary significantly and is based on many factors, some of which are outside our control;

•losses from litigation and regulatory investigations and actions;

•investor litigation or disputes, as well as regulatory inquiries, investigations or proceedings related to our Markel CATCo operations; delays or disruptions in the run-off of those operations; or the failure to realize the benefits of the transaction that permitted the accelerated return of capital to our Markel CATCo investors; and

•a number of additional factors may adversely affect our Markel Ventures operations, and the markets they serve, and negatively impact their revenues and profitability, including, among others: adverse weather conditions, plant disease and other contaminants; changes in government support for education, healthcare and infrastructure projects; changes in capital spending levels; changes in the housing, commercial and industrial construction markets; liability for environmental matters; supply chain and shipping issues, including increases in freight costs; volatility in the market prices for their products; and volatility in commodity, wholesale and raw materials prices and interest and foreign currency exchange rates.

Results from our underwriting, investing, Markel Ventures and other operations have been and will continue to be potentially materially affected by these factors.

By making forward-looking statements, we do not intend to become obligated to publicly update or revise any such statements whether as a result of new information, future events or other changes. Readers are cautioned not to place undue reliance on any forward-looking statements, which speak only as at their dates.

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Item 7A. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

Market risk is the risk of economic losses due to adverse changes in the estimated fair value of a financial instrument as the result of changes in equity prices, interest rates, foreign currency exchange rates and commodity prices. Our consolidated balance sheets include assets and liabilities with estimated fair values that are subject to market risk. Our primary market risks are equity price risk associated with investments in equity securities, interest rate risk associated with investments in fixed maturity securities and foreign currency exchange rate risk associated with our international operations.

Our fixed maturity securities and equity securities are recorded at fair value, which is measured based upon quoted prices in active markets, if available. We determine fair value for these investments after considering various sources of information, including information provided by a third-party pricing service. The pricing service provides prices for substantially all of our fixed maturity securities and equity securities. In determining fair value, we generally do not adjust the prices obtained from the pricing service. We obtain an understanding of the pricing service's valuation methodologies and related inputs, which include, but are not limited to, reported trades, benchmark yields, issuer spreads, bids, offers, duration, credit ratings, estimated cash flows and prepayment speeds. We validate prices provided by the pricing service by reviewing prices from other pricing sources and analyzing pricing data in certain instances.

Equity Price Risk

We invest a portion of shareholder funds in equity securities, which have historically produced higher long-term returns relative to fixed maturity securities. We seek to invest in profitable companies, with honest and talented management, that exhibit reinvestment opportunities and capital discipline, at reasonable prices. We intend to hold these investments over the long term and focus on long-term total investment return, understanding that gains or losses on investments may fluctuate from one period to the next. Changes in the fair value of equity securities are recognized in net income.

At December 31, 2022, our equity portfolio was concentrated in terms of the number of issuers and industries. Such concentrations can lead to higher levels of volatility. At December 31, 2022, our ten largest equity holdings represented $3.2 billion, or 42%, of the equity portfolio. Investments in the property and casualty insurance industry represented $1.5 billion, or 19%, of our equity portfolio at December 31, 2022 and included a $997.7 million investment in the common stock of Berkshire Hathaway Inc., a company whose subsidiaries engage in a number of diverse business activities in addition to insurance. We have investment guidelines that set limits on the equity holdings of our insurance subsidiaries.

The following table summarizes our equity price risk and shows the effect of a hypothetical 35% increase or decrease in market prices as of December 31, 2022 and 2021. The selected hypothetical changes do not indicate what could be the potential best or worst case scenarios.

(dollars in millions)	Estimated Fair Value		Hypothetical Price Change	Estimated Fair Value after Hypothetical Change in Prices		Estimated Hypothetical Percentage Increase (Decrease) in Shareholders' Equity
As of December 31, 2022
Equity securities	$	7,672	35% increase	$	10,357	16.2	%
			35% decrease	4,987		(16.2)
As of December 31, 2021
Equity securities	$	9,024	35% increase	$	12,182	17.0	%
			35% decrease	5,866		(17.0)

Interest Rate Risk

Our fixed maturity investments and borrowings are subject to interest rate risk. Increases and decreases in interest rates typically result in decreases and increases, respectively, in the fair value of these financial instruments. Our fixed maturity investments are recorded at estimated fair value in our financial statements, and therefore, changes in interest rates impact our financial position and results of operations. Our borrowings are recorded at amortized cost in our financial statements, and therefore, changes in fair value do not impact our financial position or results of operations.

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The majority of our investable assets come from premiums paid by policyholders. These funds are invested predominantly in high-quality government and municipal bonds and mortgage-backed securities that generally match the duration and currency of our loss reserves. As of December 31, 2022, our fixed maturity portfolio had an average duration of 3.9 years and an average rating of "AAA." See note 4(c) of the notes to consolidated financial statements included under Item 8 for details regarding contractual maturity dates of our fixed maturity portfolio. The changes in the estimated fair value of the fixed maturity portfolio are presented as a component of shareholders' equity in accumulated other comprehensive income, net of taxes. We typically hold these fixed maturity investments until maturity, and as a result, unrealized holding gains and losses on these securities are generally expected to reverse as the securities mature.

We work to manage the impact of interest rate fluctuations on our fixed maturity portfolio. The effective duration of the fixed maturity portfolio is managed with consideration given to the estimated duration of our liabilities. We have investment guidelines that limit the maximum duration and maturity of the fixed maturity portfolio.

We use a commercially available model to estimate the effect of interest rate risk on the fair values of our fixed maturity portfolio and borrowings. The model estimates the impact of interest rate changes on a wide range of factors including duration, prepayment, put options and call options. Fair values are estimated based on the present value of cash flows, using a representative set of possible future interest rate scenarios. The model requires that numerous assumptions be made about the future. To the extent that any of the assumptions are invalid, incorrect estimates could result. The usefulness of a single point-in-time model is limited, as it is unable to accurately incorporate the full complexity of market interactions.

The following table summarizes our interest rate risk and shows the effect of hypothetical changes in interest rates as of December 31, 2022 and 2021. The selected hypothetical changes do not indicate what could be the potential best or worst case scenarios.

(dollars in millions)	Estimated Fair Value		Hypothetical Change in Interest Rates (bp=basis points)	Estimated Fair Value after Hypothetical Change in Interest Rates		Hypothetical Percentage Increase (Decrease) in
						Fair Value of Fixed Maturity Securities		Shareholders' Equity
Fixed Maturity Securities
As of December 31, 2022
Total fixed maturity securities	$	11,857	200 bp decrease	$	12,843	8.3	%	6.0	%
			100 bp decrease	12,334		4.0		2.9
			100 bp increase	11,406		(3.8)		(2.7)
			200 bp increase	10,972		(7.5)		(5.3)
As of December 31, 2021
Total fixed maturity securities	$	12,587	200 bp decrease	$	13,841	10.0	%	6.7	%
			100 bp decrease	13,189		4.8		3.2
			100 bp increase	12,022		(4.5)		(3.0)
			200 bp increase	11,490		(8.7)		(5.9)
Liabilities (1)
As of December 31, 2022
Borrowings	$	3,541	200 bp decrease	$	4,384
			100 bp decrease	3,922
			100 bp increase	3,225
			200 bp increase	2,962
As of December 31, 2021
Borrowings	$	5,017	200 bp decrease	$	6,500
			100 bp decrease	5,678
			100 bp increase	4,478
			200 bp increase	4,036

(1)    Changes in estimated fair value have no impact on shareholders' equity.

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Foreign Currency Exchange Rate Risk

We have foreign currency exchange rate risk associated with certain of our international operations' assets and liabilities. We manage this risk primarily by matching assets and liabilities that are subject to foreign exchange rate risk as closely as possible. To assist with this matching, we periodically purchase foreign currency forward contracts and purchase or sell foreign currencies in the open market. Realized and unrealized gains and losses on our forward contracts are recorded in earnings. Our forward contracts generally have maturities of three months.

At both December 31, 2022 and 2021, 90% of our invested assets were denominated in United States (U.S.) Dollars. At December 31, 2022 and 2021, 89% and 86%, respectively, of our reserves for unpaid losses and loss adjustment expenses and life and annuity benefits were denominated in U.S. Dollars. At those dates, the largest foreign currency denominated balances within both our invested assets and reserves for unpaid losses and loss adjustment expenses and life and annuity benefits were the Euro and British Pound Sterling.

At December 31, 2022 and 2021, our foreign currency denominated assets and liabilities that are subject to foreign currency exchange rate risk were substantially matched or hedged.

Credit Risk

Credit risk, which is not considered a market risk, is the risk that an entity becomes unable or unwilling to fulfill their obligation to us. Our primary credit risks are the credit risk within our fixed maturity portfolio and the credit risk related to our reinsurance recoverables within our underwriting, program services and other fronting operations.

Fixed Maturity Investments

Credit risk exists within our fixed maturity portfolio from the potential for loss resulting from adverse changes in an issuer's ability to repay its debt obligations. We monitor our investment portfolio to ensure that credit risk does not exceed prudent levels. We have consistently invested in high credit quality, investment grade securities. As of December 31, 2022, our fixed maturity portfolio had an average rating of "AAA," with 99% rated "A" or better by at least one nationally recognized rating organization. Our policy is to invest in investment grade securities and to minimize investments in fixed maturity securities that are unrated or rated below investment grade. Our fixed maturity portfolio includes securities issued with financial guaranty insurance. We purchase fixed maturity securities based on our assessment of the credit quality of the underlying assets without regard to insurance.

Our fixed maturity portfolio includes securities issued by foreign governments and non-sovereign foreign institutions. General concern exists about foreign countries that experience financial difficulties during periods of adverse economic conditions. We monitor developments in foreign countries, currencies and issuers that could pose risks to our fixed maturity portfolio, including ratings downgrades, political and financial changes and the widening of credit spreads. Our fixed maturity portfolio is highly diversified and comprised of high quality securities.

We obtain information from news services, data providers, rating agencies and various financial market participants to assess potential negative impacts on a country or company's financial risk profile. We analyze concentrations within our fixed maturity portfolio by country, currency and issuer, which allows us to assess our level of diversification with respect to these exposures, reduce troubled exposures should they occur and mitigate any future financial distress that these exposures could cause.

Our fixed maturity portfolio also includes securities issued by municipalities. General concern exists about municipalities that experience financial difficulties during periods of adverse economic conditions. We manage the exposure to credit risk in our municipal bond portfolio by investing in high quality securities and by diversifying our holdings, which are typically either general obligation or revenue bonds related to essential products and services.

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Reinsurance Recoverables

We have credit risk to the extent any of our reinsurers are unwilling or unable to meet their obligations under our ceded reinsurance agreements. We monitor changes in the financial condition of each of our reinsurers, and we assess our concentration of credit risk on a regular basis. While we believe our net reinsurance recoverable balances are collectible, deterioration in reinsurers' ability to pay, or collection disputes, could adversely affect our operating cash flows, financial position and results of operations. See note 12 of the notes to consolidated financial statements included under Item 8 for additional details about our reinsurance recoverables and exposures.

Underwriting

Within our underwriting operations, our reinsurance recoverables balance for the ten largest reinsurers was $2.0 billion at December 31, 2022, representing 62% of the $3.1 billion total reinsurance recoverables, before considering allowances for credit losses. Eight of our ten largest reinsurers within our underwriting operations were rated "A" or better by A.M. Best Company (Best). As of December 31, 2022, for both of the remaining reinsurers, which are related parties, collateral held exceeded the related reinsurance recoverable. We were the beneficiary of letters of credit, trust accounts and funds withheld in the aggregate amount of $930.9 million at December 31, 2022, collateralizing reinsurance recoverable balances due from these ten reinsurers.

Within our underwriting operations, we attempt to minimize credit exposure to reinsurers through adherence to internal reinsurance guidelines. To participate in our reinsurance program, prospective companies generally must: (i) maintain a Best or Standard & Poor's rating of "A" (excellent) or better; (ii) maintain minimum capital and surplus of $750 million; and (iii) provide collateral for recoverables in excess of an individually established amount. We also consider qualitative factors when evaluating reinsurers for eligibility to participate in our reinsurance program. In addition, certain foreign reinsurers for our U.S. insurance operations must provide collateral equal to 100% of recoverables, with the exception of reinsurers who have been granted certified or authorized status by an insurance company's state of domicile. Our credit exposure to Lloyd's of London syndicates is managed through individual and aggregate exposure thresholds.

Program Services

Within our program services business, our reinsurance recoverables balance for the ten largest reinsurers was $3.3 billion at December 31, 2022, representing 67% of the $4.9 billion total reinsurance recoverables, before considering allowances for credit losses. We were the beneficiary of letters of credit, trust accounts and funds withheld in the aggregate amount of $2.3 billion at December 31, 2022, collateralizing reinsurance recoverable balances due from these ten reinsurers, and $3.3 billion for our total reinsurance recoverables balance. Five of our ten largest reinsurers were rated "A" or better by Best. For each of the remaining five reinsurers, as of December 31, 2022, collateral held exceeded the related reinsurance recoverable.

Within our program services business, we mitigate credit risk by either selecting well capitalized, highly rated authorized reinsurers or requiring that the reinsurer post substantial collateral to secure the reinsured risks, which, in some instances, exceeds the related reinsurance recoverable. For reinsurers with a credit rating of lower than "A" we employ a stringent collateral monitoring program, under which the majority of the reinsurance recoverable balances is fully collateralized. These collateral requirements are regularly monitored by a credit committee within our program services operations.

Other Fronting

For our other fronting arrangements, which are written on behalf of our ILS operations, our total reinsurance recoverables balance was $479.7 million at December 31, 2022. As of December 31, 2022, our ILS operations held investor collateral in excess of the related reinsurance recoverables. For this business, we require collateral up to a specified level of annual aggregate agreement year losses, which is held in a trust for which we are the beneficiary. The required collateral is monitored regularly against the annual aggregate agreement year losses to ensure adequacy of the reinsurance recoverable in the event of a loss.

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Item 8. FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Shareholders and Board of Directors

Markel Corporation:

Opinion on the Consolidated Financial Statements

We have audited the accompanying consolidated balance sheets of Markel Corporation and subsidiaries (the Company) as of December 31, 2022 and 2021, the related consolidated statements of income (loss) and comprehensive income (loss), changes in equity, and cash flows for each of the years in the three‑year period ended December 31, 2022, and the related notes (collectively, the consolidated financial statements). In our opinion, the consolidated financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 2022 and 2021, and the results of its operations and its cash flows for each of the years in the three‑year period ended December 31, 2022, in conformity with U.S. generally accepted accounting principles.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the Company's internal control over financial reporting as of December 31, 2022, based on criteria established in Internal Control – Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission, and our report dated February 17, 2023 expressed an unqualified opinion on the effectiveness of the Company's internal control over financial reporting.

Basis for Opinion

These consolidated financial statements are the responsibility of the Company's management. Our responsibility is to express an opinion on these consolidated financial statements based on our audits. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the consolidated financial statements are free of material misstatement, whether due to error or fraud. Our audits included performing procedures to assess the risks of material misstatement of the consolidated financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the consolidated financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the consolidated financial statements. We believe that our audits provide a reasonable basis for our opinion.

Critical Audit Matter

The critical audit matter communicated below is a matter arising from the current period audit of the consolidated financial statements that was communicated or required to be communicated to the audit committee and that: (1) relates to accounts or disclosures that are material to the consolidated financial statements and (2) involved our especially challenging, subjective, or complex judgments. The communication of a critical audit matter does not alter in any way our opinion on the consolidated financial statements, taken as a whole, and we are not, by communicating the critical audit matter below, providing a separate opinion on the critical audit matter or on the accounts or disclosures to which it relates.

Estimation of the liability for unpaid losses and loss adjustment expenses for the Company's underwriting

operations

As described in Note 11, the Company has recorded a liability for unpaid losses and loss adjustment expenses (loss reserves) of $20.9 billion as of December 31, 2022. Of this amount, $15.4 billion represents loss reserves for the Company's underwriting operations. The Company's actuaries use established actuarial methods and past development patterns to estimate ultimate losses to be paid. For its underwriting operations, loss reserves are established at the Company's best estimates, which incorporate the actuarial point estimates and are adjusted for certain subjective factors.

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We identified the assessment of loss reserve estimation for the Company's underwriting operations as a critical audit matter because it involved significant measurement uncertainty. The assessment of actuarial methods and key assumptions used to estimate ultimate losses required specialized actuarial skills and subjective auditor judgment. Key assumptions included weighting of actuarial methods, expected loss ratios, and patterns and variability of loss development.

The following are the primary procedures we performed to address this critical audit matter. With the assistance of actuarial professionals, as appropriate, we evaluated the design and tested the operating effectiveness of internal controls over the Company's loss reserving process for its underwriting operations. This included controls over key assumptions and the determination of loss reserves. Additionally, we also involved actuarial professionals with specialized skills and knowledge, who assisted in:

•assessing the Company's actuarial methodologies by comparing to generally accepted actuarial methodologies and evaluating the weighting of the methods based on common industry practice

•developing independent actuarial estimates for certain product lines using the Company's underlying historical claims and policy data, as well as industry loss reporting and payment data for certain lines

•for certain product lines, assessing the Company's assumptions about future claims reporting and payments for consistency with historical loss development and payment patterns

•developing an independent range of consolidated loss reserves based on actuarial methods and assumptions, comparing those results to the Company's recorded reserves and evaluating the movement of the Company's recorded reserve within our range

/s/ KPMG LLP

We have served as the Company's auditor since 1980.

Richmond, Virginia

February 17, 2023

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MARKEL CORPORATION AND SUBSIDIARIES

CONSOLIDATED BALANCE SHEETS

	December 31,
	2022		2021
	(dollars in thousands)
ASSETS
Investments, at estimated fair value:
Fixed maturity securities, available-for-sale (amortized cost of $12,805,887 in 2022 and $12,061,467 in 2021)	$	11,856,835	$	12,587,305
Equity securities (cost of $3,100,040 in 2022 and $2,867,899 in 2021)	7,671,912		9,023,927
Short-term investments, available-for-sale (estimated fair value approximates cost)	2,669,262		1,799,988
Total Investments	22,198,009		23,411,220
Cash and cash equivalents	4,137,432		3,978,490
Restricted cash and cash equivalents	1,084,081		902,457
Receivables	2,961,056		2,413,938
Reinsurance recoverables	8,446,745		7,293,555
Deferred policy acquisition costs	925,483		794,145
Prepaid reinsurance premiums	2,066,114		1,798,571
Goodwill	2,638,838		2,899,140
Intangible assets	1,747,464		1,822,486
Other assets	3,586,037		3,163,094
Total Assets	$	49,791,259	$	48,477,096
LIABILITIES AND EQUITY
Unpaid losses and loss adjustment expenses	$	20,947,898	$	18,178,894
Life and annuity benefits	759,025		902,980
Unearned premiums	6,220,748		5,383,619
Payables to insurance and reinsurance companies	669,742		616,665
Senior long-term debt and other debt (estimated fair value of $3,541,000 in 2022 and $5,017,000 in 2021)	4,103,629		4,361,266
Other liabilities	3,438,738		3,832,084
Total Liabilities	36,139,780		33,275,508
Redeemable noncontrolling interests	523,154		461,378
Commitments and contingencies
Shareholders' equity:
Preferred stock	591,891		591,891
Common stock	3,493,893		3,441,079
Retained earnings	9,836,827		10,446,763
Accumulated other comprehensive income (loss)	(857,077)		237,617
Total Shareholders' Equity	13,065,534		14,717,350
Noncontrolling interests	62,791		22,860
Total Equity	13,128,325		14,740,210
Total Liabilities and Equity	$	49,791,259	$	48,477,096

See accompanying notes to consolidated financial statements.

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MARKEL CORPORATION AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF INCOME (LOSS) AND COMPREHENSIVE INCOME (LOSS)

	Years Ended December 31,
	2022		2021		2020
	(dollars in thousands, except per share data)
OPERATING REVENUES
Earned premiums	$	7,587,792	$	6,503,029	$	5,612,205
Net investment income	446,755		367,417		375,826
Net investment gains (losses)	(1,595,733)		1,978,534		617,979
Products revenues	2,427,096		1,712,120		1,439,515
Services and other revenues	2,809,425		2,285,325		1,689,541
Total Operating Revenues	11,675,335		12,846,425		9,735,066
OPERATING EXPENSES
Losses and loss adjustment expenses	4,445,589		3,581,205		3,466,961
Underwriting, acquisition and insurance expenses	2,515,583		2,293,739		2,017,627
Products expenses	2,241,736		1,544,506		1,256,159
Services and other expenses	2,306,635		2,022,935		1,561,120
Amortization of intangible assets	178,778		160,539		159,315
Impairment of goodwill	80,000		—		—
Total Operating Expenses	11,768,321		9,602,924		8,461,182
Operating Income (Loss)	(92,986)		3,243,501		1,273,884
Interest expense	(196,062)		(183,579)		(177,582)
Net foreign exchange gains (losses)	140,209		72,271		(95,853)
Income (Loss) Before Income Taxes	(148,839)		3,132,193		1,000,449
Income tax (expense) benefit	47,636		(684,458)		(168,682)
Net Income (Loss)	(101,203)		2,447,735		831,767
Net income attributable to noncontrolling interests	(112,920)		(22,732)		(15,737)
Net Income (Loss) to Shareholders	(214,123)		2,425,003		816,030
Preferred stock dividends	(36,000)		(36,000)		(18,400)
Net Income (Loss) to Common Shareholders	$	(250,123)	$	2,389,003	$	797,630
OTHER COMPREHENSIVE INCOME (LOSS)
Change in net unrealized gains (losses) on available-for-sale investments, net of taxes:
Net holding gains (losses) arising during the period	$	(1,155,054)	$	(348,315)	$	356,159
Reclassification adjustments for net gains (losses) included in net income (loss)	44,906		(6,623)		(3,386)
Change in net unrealized gains (losses) on available-for-sale investments, net of taxes	(1,110,148)		(354,938)		352,773
Change in foreign currency translation adjustments, net of taxes	(9,259)		(213)		29,847
Change in net actuarial pension loss, net of taxes	24,730		8,390		(6,998)
Total Other Comprehensive Income (Loss)	(1,094,677)		(346,761)		375,622
Comprehensive Income (Loss)	(1,195,880)		2,100,974		1,207,389
Comprehensive income attributable to noncontrolling interests	(112,937)		(22,730)		(15,755)
Comprehensive Income (Loss) to Shareholders	$	(1,308,817)	$	2,078,244	$	1,191,634
NET INCOME (LOSS) PER COMMON SHARE
Basic	$	(23.57)	$	176.92	$	55.67
Diluted	$	(23.57)	$	176.51	$	55.63

See accompanying notes to consolidated financial statements.

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MARKEL CORPORATION AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY

(dollars in thousands)	Preferred Stock		Common Stock		Retained Earnings		Accumulated Other Comprehensive Income (Loss)		Total Shareholders' Equity		Noncontrolling Interests		Total Equity		Redeemable Noncontrolling Interests
December 31, 2019	$	—	$	3,404,919	$	7,457,176	$	208,772	$	11,070,867	$	7,549	$	11,078,416	$	177,562
Cumulative effect of adoption of ASC 326, Financial Instruments—Credit Losses					(3,827)		—		(3,827)		—		(3,827)		—
Cumulative effect of change in accounting policy					22,302		—		22,302		—		22,302		—
January 1, 2020	—		3,404,919		7,475,651		208,772		11,089,342		7,549		11,096,891		177,562
Net income					816,030		—		816,030		3,226		819,256		12,511
Other comprehensive income					—		375,604		375,604		—		375,604		18
Comprehensive Income									1,191,634		3,226		1,194,860		12,529
Issuance of preferred stock	591,891		—		—		—		591,891		—		591,891		—
Repurchase of common stock	—		—		(26,832)		—		(26,832)		—		(26,832)		—
Preferred stock dividends	—		—		(18,400)		—		(18,400)		—		(18,400)		—
Restricted stock awards expensed	—		29,779		—		—		29,779		—		29,779		—
Acquisition of Lansing	—		—		—		—		—		—		—		43,566
Adjustment of redeemable noncontrolling interests	—		—		(28,705)		—		(28,705)		—		(28,705)		28,705
Purchase of noncontrolling interest	—		(6,131)		—		—		(6,131)		—		(6,131)		(7,029)
Other	—		(227)		(260)		—		(487)		4,117		3,630		(9,691)
December 31, 2020	591,891		3,428,340		8,217,484		584,376		12,822,091		14,892		12,836,983		245,642
Net income					2,425,003		—		2,425,003		7,257		2,432,260		15,475
Other comprehensive loss					—		(346,759)		(346,759)		—		(346,759)		(2)
Comprehensive Income									2,078,244		7,257		2,085,501		15,473
Repurchase of common stock	—		—		(206,518)		—		(206,518)		—		(206,518)		—
Preferred stock dividends	—		—		(36,000)		—		(36,000)		—		(36,000)		—
Restricted stock awards expensed	—		30,916		—		—		30,916		—		30,916		—
Acquisition of Buckner	—		—		—		—		—		—		—		26,438
Acquisition of Metromont	—		—		—		—		—		—		—		269,908
Adjustment of redeemable noncontrolling interests	—		—		46,874		—		46,874		—		46,874		(46,874)
Purchase of noncontrolling interest	—		(18,779)		—		—		(18,779)		—		(18,779)		(38,214)
Other	—		602		(80)		—		522		711		1,233		(10,995)
December 31, 2021	591,891		3,441,079		10,446,763		237,617		14,717,350		22,860		14,740,210		461,378
Net income (loss)					(214,123)		—		(214,123)		86,739		(127,384)		26,181
Other comprehensive income (loss)					—		(1,094,694)		(1,094,694)		—		(1,094,694)		17
Comprehensive Income (Loss)									(1,308,817)		86,739		(1,222,078)		26,198
Repurchase of common stock	—		—		(290,796)		—		(290,796)		—		(290,796)		—
Preferred stock dividends	—		—		(36,000)		—		(36,000)		—		(36,000)		—
Restricted stock awards expensed	—		41,684		—		—		41,684		—		41,684		—
Adjustment of redeemable noncontrolling interests	—		—		(69,896)		—		(69,896)		—		(69,896)		69,896
Adjustment to Metromont purchase price allocation	—		—		—		—		—		—		—		(22,485)
Disposition of Velocity	—		—		—		—		—		(22,059)		(22,059)		—
Disposition of Volante	—		—		—		—		—		(3,490)		(3,490)		—
Redemption of Markel CATCo Re noncontrolling interests	—		—				—		—		(22,261)		(22,261)		—
Other	—		11,130		879		—		12,009		1,002		13,011		(11,833)
December 31, 2022	$	591,891	$	3,493,893	$	9,836,827	$	(857,077)	$	13,065,534	$	62,791	$	13,128,325	$	523,154

See accompanying notes to consolidated financial statements.

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MARKEL CORPORATION AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF CASH FLOWS

	Years Ended December 31,
	2022		2021		2020
	(dollars in thousands)
OPERATING ACTIVITIES
Net income (loss)	$	(101,203)	$	2,447,735	$	831,767
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Deferred income tax expense (benefit)	(281,752)		453,905		(2,733)
Depreciation and amortization	366,954		336,393		307,069
Net investment losses (gains)	1,595,733		(1,978,534)		(617,979)
Net foreign exchange losses (gains)	(140,209)		(72,271)		95,853
Gain on sale of businesses, net	(225,832)		(22,085)		—
Impairment of goodwill	80,000		—		—
Increase in receivables	(653,261)		(372,491)		(28,174)
Increase in reinsurance recoverables	(1,168,483)		(1,312,258)		(549,654)
Increase in deferred policy acquisition costs	(140,630)		(139,609)		(61,569)
Increase in prepaid reinsurance premiums	(271,292)		(347,982)		(34,480)
Increase in unpaid losses and loss adjustment expenses	2,383,268		2,042,486		1,383,430
Decrease in life and annuity benefits	(47,419)		(54,591)		(44,651)
Increase in unearned premiums	886,393		970,246		354,679
Increase in payables to insurance and reinsurance companies	210,810		131,559		76,586
Other	216,365		191,564		27,443
Net Cash Provided By Operating Activities	2,709,442		2,274,067		1,737,587
INVESTING ACTIVITIES
Proceeds from sales, maturities, calls and prepayments of fixed maturity securities	1,152,335		708,111		862,333
Cost of fixed maturity securities purchased	(2,112,066)		(3,165,323)		(1,129,781)
Proceeds from sales of equity securities	242,010		200,570		1,360,090
Cost of equity securities purchased	(442,991)		(255,436)		(192,437)
Net change in short-term investments	(846,019)		228,955		(829,457)
Additions to property and equipment	(254,712)		(145,249)		(101,301)
Acquisitions, net of cash acquired	(79,000)		(517,439)		(554,127)
Consolidation of Markel CATCo Re, net	629,955		—		—
Distributions to Markel CATCo Re noncontrolling interests for buy-out transaction	(169,380)		—		—
Proceeds from sale of businesses, net	201,370		40,720		—
Other	8,294		(32,711)		72,932
Net Cash Used By Investing Activities	(1,670,204)		(2,937,802)		(511,748)
FINANCING ACTIVITIES
Additions to senior long-term debt and other debt	1,034,052		1,198,505		223,183
Repayment of senior long-term debt and other debt	(1,255,005)		(486,730)		(275,996)
Repurchases of common stock	(290,796)		(206,518)		(26,832)
Issuance of preferred stock, net	—		—		591,891
Dividends paid on preferred stock	(36,000)		(36,000)		(18,400)
Other	(47,562)		(99,490)		(59,290)
Net Cash Provided (Used) By Financing Activities	(595,311)		369,767		434,556
Effect of foreign currency rate changes on cash, cash equivalents, restricted cash and restricted cash equivalents	(103,361)		(41,734)		55,901
Increase (decrease) in cash, cash equivalents, restricted cash and restricted cash equivalents	340,566		(335,702)		1,716,296
Cash, cash equivalents, restricted cash and restricted cash equivalents at beginning of year	4,880,947		5,216,649		3,500,353
CASH, CASH EQUIVALENTS, RESTRICTED CASH AND RESTRICTED CASH EQUIVALENTS AT END OF YEAR	$	5,221,513	$	4,880,947	$	5,216,649

See accompanying notes to consolidated financial statements.

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MARKEL CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

1. Summary of Significant Accounting Policies

Markel Corporation is a diverse financial holding company serving a variety of niche markets. Markel Corporation's principal business markets and underwrites specialty insurance products. Through its wholly owned subsidiary, Markel Ventures, Inc. (Markel Ventures), Markel Corporation also owns controlling interests in various businesses that operate outside of the specialty insurance marketplace. See note 2 for details regarding reportable segments.

a) Basis of Presentation. The accompanying consolidated financial statements have been prepared in accordance with United States (U.S.) generally accepted accounting principles (GAAP) and include the accounts of Markel Corporation and its consolidated subsidiaries, as well as any variable interest entities (VIEs) that meet the requirements for consolidation (the Company). All significant intercompany balances and transactions have been eliminated in consolidation. The Company consolidates the results of its Markel Ventures subsidiaries on a one-month lag, with the exception of significant transactions or events that occur during the intervening period. Certain prior period amounts have been reclassified to conform to the current period presentation.

b) Use of Estimates. The preparation of financial statements in accordance with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenues and expenses and the disclosure of contingent assets and liabilities. Management periodically reviews its estimates and assumptions. Quarterly reviews include evaluating the adequacy of reserves for unpaid losses and loss adjustment expenses and contingencies. Estimates and assumptions for goodwill and intangible assets are reviewed in conjunction with an acquisition, and goodwill and indefinite-lived intangible assets are reassessed at least annually for impairment. Actual results may differ materially from the estimates and assumptions used in preparing the consolidated financial statements.

c) Investments. Available-for-sale investments and equity securities are recorded at estimated fair value. Available-for-sale investments include fixed maturity securities and short-term investments. Fixed maturity securities include government and municipal bonds and mortgage-backed securities with original maturities of more than one year. Short-term investments include certificates of deposit, commercial paper, discount notes and treasury bills with original maturities of one year or less. Unrealized gains and losses on available-for-sale investments, net of income taxes, are included in other comprehensive income. Unrealized gains and losses on equity securities, net of income taxes, are included in net income as net investment gains or losses. The Company completes a detailed analysis each quarter to assess declines in the fair value of its available-for-sale investments. Any impairment losses on the Company's available-for-sale investments are recorded as an allowance, subject to reversal.

Premiums and discounts are amortized or accreted over the lives of the related fixed maturity securities as an adjustment to the yield using the effective interest method. Dividend and interest income are recognized when earned. Accrued interest receivable is excluded from both the estimated fair value and the amortized cost basis of available-for-sale securities and included within other assets on the Company's consolidated balance sheets. Any uncollectible accrued interest receivable is written off in the period it is deemed uncollectible. Realized investment gains or losses on available-for-sale investments are included in net income. Realized gains or losses from sales of available-for-sale investments are derived using the first-in, first-out method on the trade date.

See note 4 and note 5 for further details regarding the Company's investment portfolio.

d) Cash and Cash Equivalents. The Company considers all investments with original maturities of 90 days or less to be cash equivalents. The carrying value of the Company's cash and cash equivalents approximates fair value.

e) Restricted Cash and Cash Equivalents. Cash and cash equivalents that are restricted as to withdrawal or use are recorded as restricted cash and cash equivalents. The carrying value of the Company's restricted cash and cash equivalents approximates fair value.

f) Receivables. Receivables include amounts receivable from agents, brokers and insureds, which represent premiums that are both currently due and amounts not yet due on insurance and reinsurance policies. Premiums for insurance policies are generally due at inception. Premiums for reinsurance policies generally become due over the period of coverage based on the policy terms. Changes in the estimate of reinsurance premiums written will result in an adjustment to premiums receivable in

10K - 77

the period they are determined. Receivables also include amounts receivable from contracts with customers, which represent the Company's unconditional right to consideration for satisfying the performance obligations outlined in the contract.

The Company monitors credit risk associated with receivables, taking into consideration the fact that in certain instances in the Company's insurance operations credit risk may be reduced by the Company's right to offset loss obligations or unearned premiums against premiums receivable. An allowance is established for credit losses expected to be incurred over the life of the receivable, which is recorded net of this allowance. The allowance is charged to net income in the period the receivable is recorded and revised in subsequent periods to reflect changes in the Company's estimate of expected credit losses. See note 7 for further details regarding receivables.

g) Reinsurance Recoverables. Amounts recoverable from reinsurers are estimated in a manner consistent with the claim liability associated with the reinsured business. The Company evaluates the financial condition of its reinsurers and monitors concentration of credit risk to minimize its exposure to significant losses from individual reinsurers. To further reduce credit exposure on reinsurance recoverables, the Company has received collateral, including letters of credit and trust accounts, from certain reinsurers. Cash collateral related to these reinsurance agreements is available, without restriction, when the Company pays losses covered by the reinsurance agreements. An allowance is established for credit losses expected to be incurred over the life of the reinsurance recoverable, which is recorded net of this allowance. The allowance is charged to net income in the period the recoverable is recorded and revised in subsequent periods to reflect changes in the Company's estimate of expected credit losses. As of December 31, 2022 and 2021, the allowance for credit losses associated with the Company's reinsurance recoverables was not material to the consolidated financial statements.

h) Deferred Policy Acquisition Costs. Costs directly related to the acquisition of insurance premiums are deferred and amortized over the related policy period, generally one year. The Company only defers acquisition costs incurred that are related directly to the successful acquisition of new or renewal insurance contracts, including commissions to agents and brokers, salaries and benefits and premium taxes. Commissions received related to reinsurance premiums ceded are netted against broker commissions in determining acquisition costs eligible for deferral. To the extent that future policy revenues on existing policies are not adequate to cover related costs and expenses, deferred policy acquisition costs are charged to earnings. The Company does not consider anticipated investment income in determining whether a premium deficiency exists. See note 2(a) and (f) for further details regarding policy acquisition costs, as well as note 24 for details regarding a change to the Company's policy for accounting for deferred policy acquisition costs.

i) Goodwill and Intangible Assets. Goodwill and intangible assets are recorded as a result of business acquisitions. Goodwill represents the excess of the amount paid to acquire a business over the net fair value of assets acquired and liabilities assumed at the date of acquisition. Indefinite-lived and other intangible assets are recorded at fair value as of the acquisition date. The determination of the fair value of certain assets acquired and liabilities assumed involves significant judgment and the use of valuation models and other estimates, which require assumptions that are inherently subjective. Goodwill and indefinite-lived intangible assets are tested for impairment at least annually. The Company completes an annual test during the fourth quarter of each year based upon the results of operations through September 30. Intangible assets with definite lives are amortized using the straight-line method over their estimated useful lives, generally five to 20 years, and are reviewed for impairment when events or circumstances indicate that their carrying value may not be recoverable. See note 8 for further details regarding goodwill and intangible assets.

j) Equity Method Investments. The Company holds certain investments that are required to be accounted for under the equity method, whereby they initially are recorded at cost within other assets on the consolidated balance sheets and subsequently increased or decreased by the Company's proportionate share of the net income or loss of the investee and other transactions impacting the investee's equity. The Company records its proportionate share of net income or loss of the investee in services and other revenues. The Company records its proportionate share of other comprehensive income or loss of the investee as a component of other comprehensive income. Dividends or other equity distributions in excess of the Company's cumulative equity in earnings of the investee are recorded as a reduction of the investment. The Company reviews equity method investments for impairment when events or circumstances indicate that a decline in the fair value of the investment below its carrying value is other-than-temporary. See note 6 for further details regarding the Company's equity method investments.

k) Property and Equipment. Property and equipment is maintained primarily by certain of the Company's Markel Ventures businesses and is stated at cost less accumulated depreciation. Depreciation of property and equipment is calculated using the straight-line method over the estimated useful lives of the respective assets. Property and equipment, net of accumulated depreciation, was $1.2 billion and $1.1 billion as of December 31, 2022 and 2021, respectively, and is included in other assets on the Company's consolidated balance sheets.

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l) Leases. The present value of future lease payments for the Company's leases with terms greater than 12 months is included on the consolidated balance sheets as lease liabilities and right-of-use lease assets.

The Company's lease portfolio primarily consists of operating leases for real estate. Total expected lease payments are based on the lease payments specified in the contract and the stated term, including any options to extend or terminate that the Company is reasonably certain to exercise. The Company accounts for lease components and any associated non-lease components within a contract as a single lease component, and therefore allocates all of the expected lease payments to the lease component.

The lease liability, which represents the Company's contractual obligation to make lease payments, is calculated based on the present value of expected lease payments over the remaining lease term, discounted using the Company's collateralized incremental borrowing rate at the lease commencement date. The lease liability is then adjusted for any prepaid rent, lease incentives received or capitalized initial direct costs to determine the lease asset, which represents the Company's right to use the underlying asset for the lease term. Lease liabilities and lease assets are included in other liabilities and other assets, respectively, on the Company's consolidated balance sheets.

Total lease costs are primarily comprised of rental expense for operating leases, which is recognized on a straight line basis over the lease term. Rental expense attributable to the Company's underwriting operations is included in underwriting, acquisition and insurance expenses and rental expense attributable to the Company's other operations is included in products expenses and services and other expenses in the consolidated statements of income and comprehensive income. See note 9 for further details regarding leases.

m) Inventories. Inventories are maintained at certain of the Company's Markel Ventures businesses and consist primarily of raw materials, work-in-process and finished goods. Inventories are generally valued using the first-in-first-out method and stated at the lower of cost or net realizable value. Inventories were $639.6 million and $529.3 million as of December 31, 2022 and 2021, respectively, and are included in other assets on the Company's consolidated balance sheets.

n) Redeemable Noncontrolling Interests. The Company owns controlling interests in various companies through its Markel Ventures operations. In some cases, the Company has the option to acquire the remaining equity interests, and the remaining equity interests have the option to sell their interests to the Company, in the future. The redemption value of the remaining equity interests is generally based on the respective company's earnings in specified periods preceding the redemption date. The redeemable noncontrolling interests are currently redeemable or become redeemable between 2023 and 2032.

The Company recognizes changes in the redemption value that exceed the carrying value of redeemable noncontrolling interests to retained earnings as if the balance sheet date was also the redemption date. Changes in the redemption value also result in an adjustment to net income to common shareholders in the calculation of basic and diluted net income per common share. See note 19 for further details regarding the calculation of basic and diluted net income per common share.

o) Income Taxes. The Company records deferred income taxes to reflect the net tax effect of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and their tax bases. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in years in which those temporary differences are expected to be recovered or settled. Deferred tax assets are reduced by a valuation allowance when management believes it is more likely than not that some, or all, of the deferred tax assets will not be realized. The Company recognizes the tax benefit from an uncertain tax position taken or expected to be taken in income tax returns only if it is more likely than not that the tax position will be sustained upon examination by tax authorities, based on the technical merits of the position. Tax positions that meet the more likely than not threshold are then measured using a probability weighted approach, whereby the largest amount of tax benefit that is greater than 50% likely of being realized upon ultimate settlement is recognized. The Company recognizes interest and penalties related to uncertain tax positions in income tax expense. See note 15 for further details regarding income taxes.

p) Unpaid Losses and Loss Adjustment Expenses. Unpaid losses and loss adjustment expenses on the Company's property and casualty insurance business are based on evaluations of reported claims and estimates for losses and loss adjustment expenses incurred but not reported. Estimates for losses and loss adjustment expenses incurred but not reported are based on reserve development studies, among other things. Recorded reserves are estimates, and the ultimate liability may be greater or less than the estimates. See note 11 for further details regarding unpaid losses and loss adjustment expenses.

q) Life and Annuity Benefits. The Company has a run-off block of life and annuity reinsurance contracts that subject the Company to mortality, longevity and morbidity risks. The assumptions used to determine policy benefit reserves are generally

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locked-in for the life of the contract unless an unlocking event occurs. To the extent existing policy reserves, together with the present value of future gross premiums and expected investment income earned thereon, are not adequate to cover the present value of future benefits, settlement and maintenance costs, the locked-in assumptions are revised to current best estimate assumptions and a charge to earnings for life and annuity benefits is recognized at that time. Because of the assumptions and estimates used in establishing reserves for life and annuity benefit obligations and the long-term nature of these reinsurance contracts, the ultimate liability may be greater or less than the estimates. Results attributable to the run-off of life and annuity reinsurance contracts are included in services and other revenues and services and other expenses in the Company's consolidated statements of income and comprehensive income. Investment income earned on the investments that support the policy benefit reserves are included in net investment income. See note 13 for further details regarding life and annuity benefits and note 1(x) for information on changes to the accounting for life and annuity benefits beginning in 2023.

r) Revenue Recognition.

Property and Casualty Premiums

Insurance premiums written are generally recorded at the inception of a policy and earned on a pro rata basis over the policy period, typically one year. The cost of reinsurance ceded is initially recorded as prepaid reinsurance premiums and is amortized over the reinsurance contract period in proportion to the amount of insurance protection provided. Premiums ceded are netted against premiums written. For multi-year contracts where insurance premiums are payable in annual installments, written premiums are recorded at the inception of the contract based on management's best estimate of total premiums to be received. For contracts where the cedent has the ability to unilaterally commute or cancel coverage within the term of the policy, premiums are generally recorded on an annual basis or up to the contract cancellation point. The remaining premiums are estimated and included as written at each successive anniversary date within the multi-year term.

Assumed reinsurance premiums are recorded at the inception of each contract based upon contract terms and information received from cedents and brokers and are earned on a pro rata basis over the coverage period, or for multi-year contracts, in proportion with the underlying risk exposure to the extent there is variability in the exposure through the coverage period. Changes in reinsurance premium estimates are expected and may result in significant adjustments in any period. These estimates change over time as additional information regarding changes in underlying exposures is obtained. Any subsequent differences arising on such estimates are recorded as premiums written in the period they are determined and are earned on a pro rata basis over the coverage period, or immediately if the coverage period has ended. The Company uses the periodic method to account for assumed reinsurance from foreign reinsurers as a result of the sufficiency of the information provided by the reinsurer, which is consistent with its accounting for assumed reinsurance from U.S. reinsurers.

Certain contracts that the Company writes provide for reinstatement of coverage. Reinstatement premiums are the premiums for the restoration of the insurance or reinsurance limit of a contract to its full amount after a loss occurrence by the insured or reinsured. The Company accrues for reinstatement premiums resulting from losses recorded. Such accruals are based upon contractual terms and management judgment is involved with respect to the amount of losses recorded. Changes in estimates of losses recorded on contracts with reinstatement premium features will result in changes in reinstatement premiums based on contractual terms. Reinstatement premiums are recognized at the time losses are recorded and are generally earned on a pro rata basis over the remaining coverage period.

Other Revenues

Other revenues primarily relate to the Company's Markel Ventures, insurance-linked securities (ILS) and program services operations and consist of revenues from the sale of products and services. Revenues are recognized when, or as, control of the promised goods or services is transferred to the Company's customers, in an amount that reflects the consideration the Company expects to be entitled to in exchange for those goods or services. Contracts with customers generally have an original term of one year or less. For contracts with customers that have an original term greater than one year, the Company recognizes revenue at the amount for which it has a right to invoice for the products delivered or services performed. Certain customers may receive volume rebates or credits for products and services, which are accounted for as variable consideration. The Company estimates these amounts based on the expected amount to be provided to the customer and reduces revenues recognized by a corresponding amount. The Company does not expect significant changes to its estimates of variable consideration over the term of the contracts.

Payment terms for products and services vary by the type of product or service offered and the location of the customer, and payment is typically received at or shortly after the point of sale. For certain products, the Company requires partial payment

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in the form of a deposit before the products are delivered to the customer, which is included in other liabilities on the Company's consolidated balance sheets.

Through its Markel Ventures operations, the Company has several different businesses that manufacture or produce a variety of products, including ornamental plants, precast concrete, equipment used in baking systems, over-the-road transportation equipment, portable dredges, residential homes and flooring for the trucking industry. Most of the Company's product revenues are recognized when the products are shipped to the customer or the products arrive at the agreed upon destination with the end customer. Some of the Company's contracts include multiple performance obligations. For such arrangements, revenues are allocated to each performance obligation based on the relative standalone selling price, which is derived from amounts stated in the contract.

Through its Markel Ventures operations, the Company also has several different businesses that provide various types of services, including distribution of exterior building products, fire protection and life safety services and consulting services. Service revenues are generally recognized over the term of the contracts based on hours incurred or as services are provided.

The Company's other revenues also include investment management fee income and through 2022, managing general agent (MGA) commissions for services provided through the Company's ILS operations. Investment management fee income is recognized over the period in which investment management services are provided and is calculated and recognized monthly, typically based on the net asset value of the accounts managed. For certain accounts, the Company is also entitled to participate, on a fixed-percentage basis, in any net income generated in excess of an agreed-upon threshold as established by the underlying investment management agreements. In general, net income is calculated at the end of each calendar year and incentive fees are payable annually. Incentive fee income is recognized at the conclusion of the contractual performance period, when the uncertainty related to performance has been resolved. MGA commissions are based on the direct written premiums of the insurance contracts placed. Commissions received for these services are generally recognized when the related policy is written.

Program services fees, or ceding fees, received in exchange for providing access to the U.S. property and casualty insurance market are based on the gross premiums written on behalf of general agent and capacity provider clients. Ceding fees are earned in a manner consistent with the recognition of the gross premiums earned on the underlying insurance policies, generally on a pro rata basis over the terms of the underlying policies reinsured.

See note 10 for further details regarding products, services and other revenues.

s) Program Services. In connection with its program services business, the Company enters into contractual agreements with both producing general agents and reinsurers, whereby the general agents and reinsurers are typically obligated to each other for payment of insurance amounts, including premiums, commissions and losses. To the extent these funds are not the obligation of the Company and are settled directly between the general agent and the reinsurer, no receivables or payables are recorded for these amounts. All obligations of the Company's insurance subsidiaries owed to or on behalf of their policyholders are recorded by the Company and, to the extent appropriate, offsetting reinsurance recoverables are recorded.

t) Foreign Currency Transactions. The U.S. Dollar is the Company's reporting currency and the primary functional currency of its foreign underwriting operations. The functional currencies of the Company's other foreign operations are the currencies of the primary economic environments in which the majority of their business is transacted.

Foreign currency transaction gains and losses are the result of exchange rate changes on transactions denominated in currencies other than the functional currency at each foreign entity. Monetary assets and liabilities are remeasured to the functional currency at current exchange rates, with resulting gains and losses included in net foreign exchange gains within net income. Non-monetary assets and liabilities are remeasured to the functional currency at historic exchange rates. Available-for-sale securities are recorded at fair value with resulting gains and losses, including the portion attributable to movements in exchange rates, included in the change in net unrealized gains on available-for-sale investments, net of taxes within other comprehensive income. While the Company attempts to naturally hedge its exposure to foreign currency fluctuations by matching assets and liabilities in the same currencies, there is a financial statement mismatch between the gains or losses recorded in net income related to insurance reserves denominated in non-functional currencies and the gains or losses recorded in other comprehensive income related to the available-for-sale securities held in non-functional currencies supporting the reserves.

Assets and liabilities of foreign operations denominated in a functional currency other than the U.S. Dollar are translated into the U.S. Dollar at current exchange rates, with resulting gains or losses included, net of taxes, in the change in foreign

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currency translation adjustments within other comprehensive income. See note 20 for further details regarding the components of other comprehensive income.

u) Comprehensive Income. Comprehensive income represents all changes in equity that result from recognized transactions and other economic events during the period. Other comprehensive income refers to revenues, expenses, gains and losses that under U.S. GAAP are included in comprehensive income but excluded from net income, such as unrealized gains or losses on available-for-sale investments, foreign currency translation adjustments and changes in net actuarial pension loss. See note 20 for further details regarding other comprehensive income.

v) Net Income Per Common Share. Basic net income per common share is computed by dividing adjusted net income to shareholders by the weighted average number of common shares outstanding during the year. Diluted net income per common share is computed by dividing adjusted net income to shareholders by the weighted average number of common shares and dilutive potential common shares outstanding during the year. See note 19 for further details regarding the calculation of basic and diluted net income per common share.

w) Variable Interest Entities. The Company determines whether it has relationships with entities defined as VIEs in accordance with Financial Accounting Standards Board (FASB) Accounting Standards Codification (ASC) 810, Consolidation. Under this guidance, a VIE is consolidated by the variable interest holder that is determined to be the primary beneficiary.

An entity in which the Company holds a variable interest is a VIE if any of the following conditions exist: (a) the total equity investment at risk is not sufficient to permit the entity to finance its activities without additional subordinated financial support, (b) as a group, the holders of equity investment at risk lack either the direct or indirect ability through voting rights or similar rights to make decisions about an entity's activities that most significantly impact the entity's economic performance or the obligation to absorb the expected losses or right to receive the expected residual returns, or (c) the voting rights of some investors are disproportionate to their obligation to absorb the expected losses of the entity, their rights to receive the expected residual returns of the entity, or both and substantially all of the entity's activities either involve or are conducted on behalf of an investor with disproportionately few voting rights.

The primary beneficiary is defined as the variable interest holder that is determined to have the controlling financial interest as a result of having both (a) the power to direct the activities of a VIE that most significantly impact the economic performance of the VIE and (b) the obligation to absorb losses or right to receive benefits from the VIE that could potentially be significant to the VIE.

The Company determines whether an entity is a VIE at the inception of its variable interest in the entity and upon the occurrence of certain reconsideration events. The Company continually reassesses whether it is the primary beneficiary of VIEs in which it holds a variable interest. See note 17 for further details regarding the Company's involvement with VIEs.

x) Recent Accounting Pronouncements.

Accounting Standards Not Yet Adopted

In August 2018, the FASB issued Accounting Standards Update (ASU) No. 2018-12, Financial Services—Insurance (Topic 944): Targeted Improvements to the Accounting for Long-Duration Contracts. The FASB subsequently issued several ASUs as amendments to ASU No. 2018-12. The standard requires insurance companies with long duration contracts to: (1) review and, if there is a change, update the assumptions used to measure expected cash flows at least annually; (2) update the discount rate assumption at each reporting date; and (3) enhance certain qualitative and quantitative disclosures. ASU No. 2018-12 becomes effective for the Company during the first quarter of 2023 and will be applied using a modified retrospective approach that requires restatement of prior periods presented, including a cumulative adjustment to accumulated other comprehensive income as of January 1, 2021 (the transition date). The standard will, among other things, impact the discount rate used in estimating reserves for the Company's life and annuity reinsurance portfolio, which is in runoff. Currently, the discount rate assumption is locked-in for the life of the contracts, unless there is a loss recognition event. The adoption of ASU 2018-12 will result in a decrease to accumulated other comprehensive income of $15.3 million, net of taxes, as a result of changing the discount rate assumption as of January 1, 2021. However, the cumulative impact of changes in the discount rate assumption through the January 1, 2023 adoption date is based on the discount rate assumption determined as of the adoption date. Based on increases in interest rates between the transition date and the adoption date, the cumulative increase to accumulated other comprehensive income as of January 1, 2023 will be $89.6 million, net of taxes.

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In October 2021, the FASB issued ASU No. 2021-08, Business Combinations (Topic 805): Accounting for Contract Assets and Contract Liabilities from Contracts with Customers, which becomes effective for the Company during the first quarter of 2023. ASU No. 2021-08 requires contract assets and liabilities accounted for under FASB ASC 606, Revenue from Contracts with Customers, to be recorded at the acquisition date as if the acquirer entered into those contracts itself on the contract inception dates, rather than at fair value. At adoption, ASU No. 2021-08 will not impact the Company's financial position, results of operations or cash flows, but prospectively, this ASU will impact amounts recorded by the Company for assets acquired and liabilities assumed in conjunction with certain acquisitions.

2. Segment Reporting Disclosures

The chief operating decision maker reviews the Company's ongoing underwriting operations on a global basis in the following two segments: Insurance and Reinsurance. In determining how to allocate resources and assess the performance of the Company's underwriting results, management considers many factors, including the nature of the insurance product sold, the type of account written and the type of customer served. The Insurance segment includes all direct business and facultative placements written on a risk-bearing basis within the Company's underwriting operations. The Reinsurance segment includes all treaty reinsurance written on a risk-bearing basis within the Company's underwriting operations. All investing activities related to the Company's insurance operations are included in the Investing segment.

The chief operating decision maker reviews and assesses Markel Ventures' performance in the aggregate, as a single operating segment. The Markel Ventures segment primarily consists of controlling interests in a diverse portfolio of businesses that operate in various industries.

The Company's other operations primarily consist of the results of the Company's insurance-linked securities operations and program services business. Other operations also include results for lines of business discontinued prior to, or in conjunction with, acquisitions, including development on asbestos and environmental loss reserves and results attributable to the run-off of life and annuity reinsurance business, which are monitored separately from the Company's ongoing underwriting operations. For purposes of segment reporting, none of these other operations are considered to be reportable segments.

Segment profit for each of the Company's underwriting segments is measured by underwriting profit. The property and casualty insurance industry commonly defines underwriting profit as earned premiums net of losses and loss adjustment expenses and underwriting, acquisition and insurance expenses. Underwriting profit does not replace operating income or net income computed in accordance with U.S. GAAP as a measure of profitability. Underwriting profit or loss provides a basis for management to evaluate the Company's underwriting performance. Segment profit for the Company's underwriting segments may also include other revenues and expenses that are attributable to the Company's underwriting operations that are not captured in underwriting profit. Segment profit for the Investing segment is measured by income from the Company's investment portfolio, which is comprised of net investment income and net investment gains. Segment profit for the Investing segment also includes income from equity method investments, which is included within services and other revenues. Segment profit for the Markel Ventures segment is measured by operating income.

For management reporting purposes, the Company allocates assets to its underwriting operations and to its Investing and Markel Ventures segments and certain of its other operations, including its insurance-linked securities and program services operations. Underwriting assets include assets attributed to the Company's Insurance and Reinsurance segments, discontinued underwriting lines of business, as well as assets that are not specifically allocated to the Company's other operations. Generally, the Company manages its underwriting assets in the aggregate and therefore does not allocate assets to individual underwriting segments.

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a) The following tables summarize the Company's segment disclosures.

	Year Ended December 31, 2022
(dollars in thousands)	Insurance		Reinsurance		Investing		Markel Ventures		Other (1)		Consolidated
Gross premium volume	$	8,606,700	$	1,229,851	$	—	$	—	$	3,365,131	$	13,201,682
Net written premiums	7,040,176		1,167,312		—		—		(4,098)		8,203,390
Earned premiums	6,528,263		1,063,347		—		—		(3,818)		7,587,792
Losses and loss adjustment expenses:
Current accident year	(3,936,425)		(676,610)		—		—		—		(4,613,035)
Prior accident years	142,924		26,052		—		—		(1,530)		167,446
Underwriting, acquisition and insurance expenses:
Amortization of policy acquisition costs	(1,375,539)		(279,567)		—		—		—		(1,655,106)
Other underwriting expenses	(809,352)		(49,363)		—		—		(1,762)		(860,477)
Underwriting profit (loss)	549,871		83,859		—		—		(7,110)		626,620
Net investment income	—		—		445,846		909		—		446,755
Net investment losses	—		—		(1,595,733)		—		—		(1,595,733)
Products revenues	—		—		—		2,427,096		—		2,427,096
Services and other revenues	—		—		(17,661)		2,329,522		497,564		2,809,425
Products expenses	—		—		—		(2,241,736)		—		(2,241,736)
Services and other expenses	—		—		—		(2,111,510)		(195,125)		(2,306,635)
Amortization of intangible assets (2)	—		—		—		(79,043)		(99,735)		(178,778)
Impairment of goodwill	—		—		—		—		(80,000)		(80,000)
Segment profit (loss)	$	549,871	$	83,859	$	(1,167,548)	$	325,238	$	115,594	$	(92,986)
Interest expense											(196,062)
Net foreign exchange gains											140,209
Loss before income taxes											$	(148,839)

(1)    Other represents the total profit (loss) attributable to the Company's operations that are not included in a reportable segment, as well as amortization of intangible assets attributable to the underwriting segments, which is not allocated between the Insurance and Reinsurance segments.

(2)    Segment profit for the Markel Ventures segment includes amortization of intangible assets attributable to Markel Ventures. Amortization of intangible assets attributable to the Company's underwriting segments, included in Other, was $38.5 million for the year ended December 31, 2022.

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	Year Ended December 31, 2021
(dollars in thousands)	Insurance		Reinsurance		Investing		Markel Ventures		Other (1)		Consolidated
Gross premium volume	$	7,239,676	$	1,246,143	$	—	$	—	$	2,952,863	$	11,438,682
Net written premiums	5,998,890		1,126,167		—		—		(5,326)		7,119,731
Earned premiums	5,465,284		1,042,048		—		—		(4,303)		6,503,029
Losses and loss adjustment expenses:
Current accident year	(3,311,185)		(749,815)		—		—		—		(4,061,000)
Prior accident years	506,292		(19,928)		—		—		(6,569)		479,795
Underwriting, acquisition and insurance expenses:
Amortization of policy acquisition costs	(1,153,049)		(266,217)		—		—		—		(1,419,266)
Other underwriting expenses	(810,929)		(61,326)		—		—		(2,218)		(874,473)
Underwriting profit (loss)	696,413		(55,238)		—		—		(13,090)		628,085
Net investment income	—		—		367,406		11		—		367,417
Net investment gains	—		—		1,978,534		—		—		1,978,534
Products revenues	—		—		—		1,712,120		—		1,712,120
Services and other revenues	—		—		7,184		1,931,696		346,445		2,285,325
Products expenses	—		—		—		(1,544,506)		—		(1,544,506)
Services and other expenses	—		109		—		(1,769,201)		(253,843)		(2,022,935)
Amortization of intangible assets (2)	—		—		—		(57,568)		(102,971)		(160,539)
Segment profit (loss)	$	696,413	$	(55,129)	$	2,353,124	$	272,552	$	(23,459)	$	3,243,501
Interest expense											(183,579)
Net foreign exchange gains											72,271
Income before income taxes											$	3,132,193

(1)    Other represents the total profit (loss) attributable to the Company's operations that are not included in a reportable segment, as well as amortization of intangible assets attributable to the underwriting segments, which is not allocated between the Insurance and Reinsurance segments.

(2)    Segment profit for the Markel Ventures segment includes amortization of intangible assets attributable to Markel Ventures. Amortization of intangible assets attributable to the Company's underwriting segments, included in Other, was $41.2 million for the year ended December 31, 2021.

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	Year Ended December 31, 2020
(dollars in thousands)	Insurance		Reinsurance		Investing		Markel Ventures		Other (1)		Consolidated
Gross premium volume	$	6,029,024	$	1,130,923	$	—	$	—	$	2,106,718	$	9,266,665
Net written premiums	4,977,662		960,123		—		—		(5,547)		5,932,238
Earned premiums	4,688,448		929,348		—		—		(5,591)		5,612,205
Losses and loss adjustment expenses:
Current accident year	(3,373,085)		(700,240)		—		—		—		(4,073,325)
Prior accident years	554,586		51,755		—		—		23		606,364
Underwriting, acquisition and insurance expenses:
Amortization of policy acquisition costs	(988,668)		(240,493)		—		—		—		(1,229,161)
Other underwriting expenses	(712,280)		(74,379)		—		—		(1,807)		(788,466)
Underwriting profit (loss)	169,001		(34,009)		—		—		(7,375)		127,617
Net investment income	—		—		375,581		245		—		375,826
Net investment gains	—		—		617,979		—		—		617,979
Products revenues	—		—		—		1,439,515		—		1,439,515
Services and other revenues	—		—		(3,996)		1,355,199		338,338		1,689,541
Products expenses	—		—		—		(1,256,159)		—		(1,256,159)
Services and other expenses	—		(41,461)		—		(1,232,150)		(287,509)		(1,561,120)
Amortization of intangible assets (2)	—		—		—		(52,572)		(106,743)		(159,315)
Segment profit (loss)	$	169,001	$	(75,470)	$	989,564	$	254,078	$	(63,289)	$	1,273,884
Interest expense											(177,582)
Net foreign exchange losses											(95,853)
Income before income taxes											$	1,000,449

(1)    Other represents the total profit (loss) attributable to the Company's operations that are not included in a reportable segment, as well as amortization of intangible assets attributable to the underwriting segments, which is not allocated between the Insurance and Reinsurance segments.

(2)    Segment profit for the Markel Ventures segment includes amortization of intangible assets attributable to Markel Ventures. Amortization of intangible assets attributable to the Company's underwriting segments, included in Other, was $41.9 million for the year ended December 31, 2020.

b) The following amounts attributable to the Markel Ventures segment are also reviewed, or included in measures reviewed, by the Company's chief operating decision maker.

	Years Ended December 31,
(dollars in thousands)	2022		2021		2020
Depreciation expense	$	102,055	$	72,580	$	60,284
Interest expense (1)	$	46,780	$	35,031	$	46,664
Income tax expense	$	61,588	$	43,626	$	45,815
Capital expenditures	$	225,230	$	124,451	$	75,404

(1)    Interest expense for the years ended December 31, 2022, 2021 and 2020 included intercompany interest expense of $27.4 million, $25.8 million and $32.0 million, respectively, which was eliminated in consolidation.

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c) The following table summarizes earned premiums by major product grouping within each underwriting segment.

	Years Ended December 31,
(dollars in thousands)	2022		2021		2020
Insurance segment:
General liability	$	1,927,721	$	1,564,221	$	1,261,411
Professional liability	1,739,983		1,523,536		1,141,034
Property	428,563		362,637		356,934
Marine and energy	585,885		495,897		458,050
Personal lines	489,648		451,095		405,210
Programs	384,952		222,410		238,909
Workers' compensation	385,054		354,337		338,186
Credit and surety	193,701		161,155		151,397
Other products	392,756		329,996		337,317
Total Insurance	6,528,263		5,465,284		4,688,448
Reinsurance segment:
Professional liability	398,839		320,646		243,645
General liability	382,482		314,699		195,468
Specialty	275,033		276,943		298,267
Property	6,993		129,760		191,968
Total Reinsurance	1,063,347		1,042,048		929,348
Other	(3,818)		(4,303)		(5,591)
Total earned premiums	$	7,587,792	$	6,503,029	$	5,612,205

The Company does not manage products at this level of aggregation as it offers a diverse portfolio of products and manages these products in logical groupings within each underwriting segment.

During the years ended December 31, 2022, 2021 and 2020, 80%, 80% and 79%, respectively, of gross premiums written in the Company's underwriting segments were attributed to risks or cedents located in the United States. Substantially all of the gross premiums written in the Company's program services and other fronting businesses during 2022, 2021 and 2020 were attributed to risks located in the United States.

Most of the Company's gross written premiums are placed through insurance and reinsurance brokers. During the years ended December 31, 2022, 2021 and 2020, the Company's top three independent brokers accounted for 28%, 28% and 31% of gross premiums written in the Company's underwriting segments. During the years ended December 31, 2022, 2021 and 2020, the top three independent brokers accounted for 19%, 19% and 20%, respectively, of gross premiums written in the Insurance segment and 88%, 84% and 84%, respectively, of gross premiums written in the Reinsurance segment.

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d) The following table summarizes total products revenues and services and other revenues by major product and service grouping within the Company's Markel Ventures segment.

	Years Ended December 31,
(dollars in thousands)	2022		2021		2020
Products:
Consumer and building	$	1,510,130	$	911,422	$	814,697
Transportation-related	612,467		474,839		351,559
Equipment manufacturing	304,499		325,859		273,259
Total products revenues	2,427,096		1,712,120		1,439,515
Services and other:
Construction	1,910,403		1,554,592		915,696
Consulting	326,549		277,902		283,386
Other	92,570		99,202		156,117
Total services and other revenues	2,329,522		1,931,696		1,355,199
Total products revenues and services and other revenues	$	4,756,618	$	3,643,816	$	2,794,714

The Company does not manage the Markel Ventures portfolio of businesses at this level of aggregation due to the distinct characteristics of each business and the autonomy with which each business operates. Management reviews and assesses the performance of the Markel Ventures businesses in the aggregate at the Markel Ventures segment level, while individual management teams are responsible for developing strategic initiatives, managing day-to-day operations and making investment and capital allocation decisions for their respective companies.

During the years ended December 31, 2022, 2021 and 2020, the portion of Markel Ventures segment revenues attributable to U.S. operations was 96%, 95%, and 95%, respectively.

e) The following table reconciles segment assets to the Company's consolidated balance sheets.

	December 31,
(dollars in thousands)	2022		2021
Segment assets:
Investing	$	26,982,280	$	28,277,801
Underwriting	8,853,559		8,111,316
Markel Ventures	5,315,677		4,958,279
Total segment assets	41,151,516		41,347,396
Other operations	8,639,743		7,129,700
Total assets	$	49,791,259	$	48,477,096

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f) The following table summarizes deferred policy acquisition costs, unearned premiums and unpaid losses and loss adjustment expenses.

(dollars in thousands)	Deferred Policy Acquisition Costs		Unearned Premiums		Unpaid Losses and Loss Adjustment Expenses
December 31, 2022
Insurance segment	$	677,921	$	4,015,252	$	11,616,386
Reinsurance segment	247,562		921,541		3,581,699
Other underwriting	—		9,473		197,602
Total underwriting	925,483		4,946,266		15,395,687
Program services and other fronting	—		1,274,482		5,204,290
Markel CATCo Re (see note 17)	—		—		347,921
Total	$	925,483	$	6,220,748	$	20,947,898
December 31, 2021
Insurance segment	$	574,181	$	3,350,054	$	10,051,994
Reinsurance segment	219,964		802,824		3,639,210
Other underwriting	—		—		271,356
Total underwriting	794,145		4,152,878		13,962,560
Program services and other fronting	—		1,230,741		4,216,334
Total	$	794,145	$	5,383,619	$	18,178,894

3. Acquisitions and Dispositions

Volante

In October 2022, the Company sold its controlling interest in its Volante managing general agent companies (Volante) for total consideration of $181.9 million, of which $155.6 million was cash. This transaction resulted in a gain of $118.5 million that was included in services and other revenue. Volante underwrites and administers specialty insurance and reinsurance policies and provides delegated underwriting services to third-party providers of insurance capital.

Velocity

In February 2022, the Company sold the majority of its controlling interest in its Velocity managing general agent companies (Velocity) for total cash consideration of $181.3 million, of which $165.6 million was received in 2022. This transaction resulted in a gain of $107.3 million that was included in services and other revenues. Velocity provides risk origination services for the Company's Nephila insurance-linked securities fund management operations, as well as for third parties. The Company retained a minority interest in Velocity that was recorded at fair value as of the transaction date ($47.4 million) and is accounted for under the equity method.

Metromont LLC

In December 2021, the Company acquired 51% of Metromont LLC (Metromont), a precast concrete manufacturer and concrete building solutions provider for commercial projects. Under the terms of the acquisition agreement, the Company has the option to acquire the remaining equity interests and the remaining equity holders have the option to sell their interests to the Company in the future. The redemption value of the remaining equity interests is generally based on Metromont's earnings in specified periods preceding the redemption date. Total consideration for the transaction was $274.5 million, all of which was cash.

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As of December 31, 2021, the purchase price was preliminarily allocated to the acquired assets and liabilities of Metromont based on estimated fair value at the acquisition date. During 2022, the Company completed the process of determining the fair value of the assets acquired and liabilities assumed with Metromont and recognized goodwill of $101.6 million, intangible assets of $230.0 million and redeemable noncontrolling interests of $247.4 million. The final purchase price allocation reflected differences from the preliminary purchase price allocation, including an $86.1 million increase in the amount recognized for intangible assets upon completion of a third-party valuation and a $22.5 million decrease in the allocation to redeemable noncontrolling interests, all of which resulted in a $117.7 million decrease to goodwill from the preliminary amount recognized. Goodwill is primarily attributable to expected future earnings and cash flow potential of Metromont, of which the Company's share is deductible for income tax purposes. Intangible assets include $175.0 million of customer relationships and $55.0 million of trade names, which are being amortized over 17 years and 15 years, respectively. Results attributable to Metromont are included in the Company's Markel Ventures segment.

Buckner HeavyLift Cranes

In August 2021, the Company acquired 90% of the holding company for the Buckner HeavyLift Cranes companies (Buckner), a provider of crane rental services for large commercial contractors. Under the terms of the acquisition agreement, the Company has the option to acquire the remaining equity interests and the remaining equity holders have the option to sell their interests to the Company in the future. The redemption value of the remaining equity interests is generally based on Buckner's earnings in specified periods preceding the redemption dates. Total consideration for the transaction was $237.9 million, all of which was cash.

As of December 31, 2021, the purchase price was preliminarily allocated to the acquired assets and liabilities of Buckner based on estimated fair value at the acquisition date. During 2022, the Company completed the process of determining the fair value of the assets acquired and liabilities assumed with Buckner and recognized goodwill of $109.9 million, intangible assets of $60.0 million and fixed assets of $290.4 million, primarily related to cranes. The final purchase price allocation reflected differences from the preliminary purchase price allocation, including a $42.2 million decrease in the amount recognized for the cranes upon completion of a third-party valuation, which resulted in a $35.3 million net increase to goodwill from the preliminary amount recognized. Goodwill is primarily attributable to expected future earnings and cash flow potential of Buckner, and it is not deductible for income tax purposes. Intangible assets include $50.0 million of customer relationships and $10.0 million of trade names, which are being amortized over 7 years and 15 years, respectively. Additionally, the Company assumed long-term debt of $165.1 million and recognized redeemable noncontrolling interests of $26.4 million. Results attributable to Buckner are included in the Company's Markel Ventures segment.

Lansing Building Products, LLC

In April 2020, the Company acquired a controlling interest in Lansing Building Products, LLC, a supplier of exterior building products and materials to professional contractors throughout the U.S., which simultaneously acquired the distribution business of Harvey Building Products to enhance geographic reach and scale (together, Lansing), bringing the Company's ownership in Lansing to 91%. Under the terms of the acquisition agreement, the Company has the option to acquire the remaining equity interests and the remaining equity holders have the option to sell their interests to the Company in the future. The redemption value of the remaining equity interests is generally based on Lansing's earnings in specified periods preceding the redemption dates. Total consideration for both transactions was $559.2 million, all of which was cash.

The purchase price was allocated to the acquired assets and liabilities of Lansing based on estimated fair value at the acquisition date. The Company recognized goodwill of $287.1 million, which is primarily attributable to expected future earnings and cash flow potential of Lansing. The majority of the goodwill recognized is not deductible for income tax purposes. The Company also recognized other intangible assets of $210.0 million, which included $188.0 million of customer relationships and $22.0 million of trade names, which are being amortized over a weighted average period of 16 years and 14 years, respectively. The Company also recognized redeemable noncontrolling interests of $43.6 million. Results attributable to Lansing are included in the Company's Markel Ventures segment.

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4. Investments

a) The following tables summarize the Company's available-for-sale investments. Commercial and residential mortgage-backed securities include securities issued by U.S. government-sponsored enterprises and U.S. government agencies. The net unrealized holding gains (losses) in the tables below are presented before taxes and any reserve deficiency adjustments for life and annuity benefit reserves. See note 13.

	December 31, 2022
(dollars in thousands)	Amortized Cost		Gross Unrealized Holding Gains		Gross Unrealized Holding Losses		Estimated Fair Value
Fixed maturity securities:
U.S. Treasury securities	$	3,050,089	$	2,363	$	(138,493)	$	2,913,959
U.S. government-sponsored enterprises	871,463		154		(106,079)		765,538
Obligations of states, municipalities and political subdivisions	3,973,911		6,503		(247,231)		3,733,183
Foreign governments	1,473,658		2,843		(169,723)		1,306,778
Commercial mortgage-backed securities	2,109,721		395		(169,668)		1,940,448
Residential mortgage-backed securities	553,591		6		(26,804)		526,793
Asset-backed securities	1,693		—		(53)		1,640
Corporate bonds	771,761		836		(104,101)		668,496
Total fixed maturity securities	12,805,887		13,100		(962,152)		11,856,835
Short-term investments	2,663,560		5,760		(58)		2,669,262
Investments, available-for-sale	$	15,469,447	$	18,860	$	(962,210)	$	14,526,097

	December 31, 2021
(dollars in thousands)	Amortized Cost		Gross Unrealized Holding Gains		Gross Unrealized Holding Losses		Estimated Fair Value
Fixed maturity securities:
U.S. Treasury securities	$	2,489,032	$	2,633	$	(21,471)	$	2,470,194
U.S. government-sponsored enterprises	753,029		28,997		(6,439)		775,587
Obligations of states, municipalities and political subdivisions	4,007,211		266,575		(7,862)		4,265,924
Foreign governments	1,394,771		134,071		(9,488)		1,519,354
Commercial mortgage-backed securities	1,928,775		69,810		(8,152)		1,990,433
Residential mortgage-backed securities	699,136		27,084		(170)		726,050
Asset-backed securities	3,035		46		—		3,081
Corporate bonds	786,478		54,475		(4,271)		836,682
Total fixed maturity securities	12,061,467		583,691		(57,853)		12,587,305
Short-term investments	1,805,300		28		(5,340)		1,799,988
Investments, available-for-sale	$	13,866,767	$	583,719	$	(63,193)	$	14,387,293

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b) The following tables summarize gross unrealized investment losses on available-for-sale investments by the length of time that securities have continuously been in an unrealized loss position.

	December 31, 2022
	Less than 12 months				12 months or longer				Total
(dollars in thousands)	Estimated Fair Value		Gross  Unrealized Holding Losses		Estimated Fair Value		Gross  Unrealized Holding Losses		Estimated Fair Value		Gross  Unrealized Holding Losses
Fixed maturity securities:
U.S. Treasury securities	$	735,605	$	(30,583)	$	1,907,922	$	(107,910)	$	2,643,527	$	(138,493)
U.S. government-sponsored enterprises	413,495		(40,488)		331,391		(65,591)		744,886		(106,079)
Obligations of states, municipalities and political subdivisions	2,474,289		(164,537)		348,943		(82,694)		2,823,232		(247,231)
Foreign governments	900,322		(115,324)		300,423		(54,399)		1,200,745		(169,723)
Commercial mortgage-backed securities	1,611,603		(117,482)		305,217		(52,186)		1,916,820		(169,668)
Residential mortgage-backed securities	516,423		(25,232)		9,342		(1,572)		525,765		(26,804)
Asset-backed securities	1,640		(53)		—		—		1,640		(53)
Corporate bonds	496,766		(74,542)		153,035		(29,559)		649,801		(104,101)
Total fixed maturity securities	7,150,143		(568,241)		3,356,273		(393,911)		10,506,416		(962,152)
Short-term investments	774,480		(58)		—		—		774,480		(58)
Total	$	7,924,623	$	(568,299)	$	3,356,273	$	(393,911)	$	11,280,896	$	(962,210)

At December 31, 2022, the Company held 1,400 available-for-sale securities in an unrealized loss position with a total estimated fair value of $11.3 billion and gross unrealized losses of $962.2 million. Of these 1,400 securities, 246 securities had been in a continuous unrealized loss position for one year or longer and had a total estimated fair value of $3.4 billion and gross unrealized losses of $393.9 million.

	December 31, 2021
	Less than 12 months				12 months or longer				Total
(dollars in thousands)	Estimated Fair Value		Gross  Unrealized Holding Losses		Estimated Fair Value		Gross  Unrealized Holding Losses		Estimated Fair Value		Gross  Unrealized Holding Losses
Fixed maturity securities:
U.S. Treasury securities	$	2,236,637	$	(18,433)	$	97,173	$	(3,038)	$	2,333,810	$	(21,471)
U.S. government-sponsored enterprises	381,495		(5,640)		14,010		(799)		395,505		(6,439)
Obligations of states, municipalities and political subdivisions	393,249		(6,941)		23,589		(921)		416,838		(7,862)
Foreign governments	322,813		(8,596)		25,564		(892)		348,377		(9,488)
Commercial mortgage-backed securities	345,616		(7,765)		9,189		(387)		354,805		(8,152)
Residential mortgage-backed securities	12,828		(159)		269		(11)		13,097		(170)
Corporate bonds	193,786		(4,271)		—		—		193,786		(4,271)
Total fixed maturity securities	3,886,424		(51,805)		169,794		(6,048)		4,056,218		(57,853)
Short-term investments	228,870		(5,340)		—		—		228,870		(5,340)
Total	$	4,115,294	$	(57,145)	$	169,794	$	(6,048)	$	4,285,088	$	(63,193)

At December 31, 2021, the Company held 277 available-for-sale securities in an unrealized loss position with a total estimated fair value of $4.3 billion and gross unrealized losses of $63.2 million. Of these 277 securities, 13 securities had been in a continuous unrealized loss position for one year or longer and had a total estimated fair value of $169.8 million and gross unrealized losses of $6.0 million.

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The Company completes a detailed analysis each quarter to assess whether the decline in the fair value of any investment below its cost basis is the result of a credit loss. All available-for-sale securities with unrealized losses are reviewed. The Company considers many factors in completing its quarterly review of securities with unrealized losses for credit-related impairment to determine whether a credit loss exists, including the extent to which fair value is below cost, the implied yield to maturity, rating downgrades of the security and whether or not the issuer has failed to make scheduled principal or interest payments. The Company also takes into consideration information about the financial condition of the issuer and industry factors that could negatively impact the capital markets.

If the decline in fair value of an available-for-sale security below its amortized cost is considered to be the result of a credit loss, the Company compares the estimated present value of the cash flows expected to be collected to the amortized cost of the security. The extent to which the estimated present value of the cash flows expected to be collected is less than the amortized cost of the security represents the credit loss, which is recorded as an allowance and recognized in net income. The allowance is limited to the difference between the fair value and the amortized cost of the security. Any remaining decline in fair value represents the non-credit portion of the impairment, which is recognized in other comprehensive income. The Company did not have an allowance for credit losses as of December 31, 2022 or 2021.

Quarterly, the Company also considers whether it intends to sell an available-for-sale security or if it is more likely than not that it will be required to sell a security before recovery of its amortized cost. In these instances, a decline in fair value is recognized in net income based on the fair value of the security at the time of assessment, resulting in a new cost basis for the security. As of December 31, 2022, the Company did not intend to sell or believe it would be required to sell any available-for-sale securities in an unrealized loss position before recovery of their amortized cost.

c) The amortized cost and estimated fair value of fixed maturity securities at December 31, 2022 are shown below by contractual maturity.

(dollars in thousands)	Amortized Cost		Estimated Fair Value
Due in one year or less	$	1,363,418	$	1,337,550
Due after one year through five years	3,926,756		3,708,752
Due after five years through ten years	3,115,913		2,787,686
Due after ten years	1,734,795		1,553,966
	10,140,882		9,387,954
Commercial mortgage-backed securities	2,109,721		1,940,448
Residential mortgage-backed securities	553,591		526,793
Asset-backed securities	1,693		1,640
Total fixed maturity securities	$	12,805,887	$	11,856,835

Expected maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without penalties, and the holders may have the right to put the securities back to the issuer. Based on expected maturities, the estimated average duration of fixed maturity securities at December 31, 2022 was 3.9 years.

d) The following table presents the components of net investment income.

	Years Ended December 31,
(dollars in thousands)	2022		2021		2020
Interest:
Fixed maturity securities	$	294,417	$	283,366	$	288,421
Short-term investments	33,493		2,475		6,400
Cash and cash equivalents	28,890		479		7,921
Dividends on equity securities	107,213		98,099		89,303
	464,013		384,419		392,045
Investment expenses	(17,258)		(17,002)		(16,219)
Net investment income	$	446,755	$	367,417	$	375,826

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e) The following table presents the components of net investment gains (losses) included in net income (loss) and the change in net unrealized gains (losses) included in other comprehensive income (loss). Gross realized investment gains and losses on fixed maturity securities, short-term investments and other investments were not material to the consolidated financial statements and are presented on a net basis in the following table.

	Years Ended December 31,
(dollars in thousands)	2022		2021		2020
Fixed maturity securities, short-term investments and other investments:
Net realized investment gains (losses)	$	(40,983)	$	37,908	$	14,780
Equity securities:
Change in fair value of securities sold during the period	(14,884)		25,902		(470,008)
Change in fair value of securities held at the end of the period	(1,539,866)		1,914,724		1,073,207
Total change in fair value	(1,554,750)		1,940,626		603,199
Net investment gains (losses)	$	(1,595,733)	$	1,978,534	$	617,979
Change in net unrealized gains (losses) on available-for-sale investments included in other comprehensive income (loss):
Fixed maturity securities	$	(1,474,890)	$	(504,133)	$	507,903
Short-term investments	11,014		(8,951)		2,344
Reserve deficiency adjustment for life and annuity benefit reserves (see note 13)	56,560		62,988		(68,158)
Net increase (decrease)	$	(1,407,316)	$	(450,096)	$	442,089

f) Total restricted assets are included on the Company's consolidated balance sheets as follows.

	December 31,
(dollars in thousands)	2022		2021
Investments	$	4,160,842	$	4,403,414
Restricted cash and cash equivalents	1,084,081		902,457
Total	$	5,244,923	$	5,305,871

The following table presents the components of restricted assets.

	December 31,
(dollars in thousands)	2022		2021
Assets held in trust or on deposit to support underwriting activities	$	4,807,135	$	4,895,627
Assets pledged as security for letters of credit	437,788		410,244
Total	$	5,244,923	$	5,305,871

g) At December 31, 2022 and 2021, investments in securities issued by the U.S. Treasury, U.S. government agencies and U.S. government-sponsored enterprises were the only investments in any one issuer that exceeded 10% of shareholders' equity.

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5. Fair Value Measurements

FASB ASC 820, Fair Value Measurements and Disclosures, establishes a three-level hierarchy that prioritizes the inputs to valuation techniques used to measure fair value. The fair value hierarchy gives the highest priority to quoted prices in active markets for identical assets or liabilities (Level 1) and the lowest priority to unobservable inputs (Level 3). If the inputs used to measure the assets or liabilities fall within different levels of the hierarchy, the classification is based on the lowest level input that is significant to the fair value measurement of the asset or liability.

Classification of assets and liabilities within the hierarchy considers the markets in which the assets and liabilities are traded and the reliability and transparency of the assumptions used to determine fair value. The hierarchy requires the use of observable market data when available. The levels of the hierarchy are defined as follows:

•Level 1 – Inputs to the valuation methodology are quoted prices (unadjusted) for identical assets or liabilities traded in active markets.

•Level 2 – Inputs to the valuation methodology include quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable for the asset or liability and market-corroborated inputs.

•Level 3 – Inputs to the valuation methodology are unobservable for the asset or liability and are significant to the fair value measurement.

In accordance with ASC 820, the Company determines fair value based on the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. In determining fair value, the Company uses various methods, including the market, income and cost approaches. The Company uses valuation techniques that maximize the use of observable inputs and minimize the use of unobservable inputs. The following section describes the valuation methodologies used by the Company to measure assets and liabilities at fair value, including an indication of the level within the fair value hierarchy in which each asset or liability is generally classified.

Available-for-sale investments and equity securities. Available-for-sale investments and equity securities are recorded at fair value on a recurring basis. Available-for-sale investments include fixed maturity securities and short-term investments. Fair value is determined by the Company after considering various sources of information, including information provided by a third-party pricing service. The pricing service provides prices for substantially all of the Company's fixed maturity securities and equity securities. In determining fair value, the Company generally does not adjust the prices obtained from the pricing service. The Company obtains an understanding of the pricing service's valuation methodologies and related inputs, which include, but are not limited to, reported trades, benchmark yields, issuer spreads, bids, offers, duration, credit ratings, estimated cash flows and prepayment speeds. The Company validates prices provided by the pricing service by reviewing prices from other pricing sources and analyzing pricing data in certain instances.

The Company has evaluated the various types of securities in its investment portfolio to determine an appropriate fair value hierarchy level based upon trading activity and the observability of market inputs. Level 1 investments include those traded on an active exchange, such as the New York Stock Exchange. Level 2 investments include U.S. Treasury securities, U.S. government-sponsored enterprises, municipal bonds, foreign government bonds, commercial mortgage-backed securities, residential mortgage-backed securities, asset-backed securities and corporate debt securities. Level 3 investments include the Company's investments in insurance-linked securities funds that are not traded on an active exchange and are valued using unobservable inputs.

Fair value for available-for-sale investments and equity securities is measured based upon quoted prices in active markets, if available. Due to variations in trading volumes and the lack of quoted market prices, fixed maturity securities are classified as Level 2 investments. The fair value of fixed maturity securities is normally derived through recent reported trades for identical or similar securities, making adjustments through the reporting date based upon available market observable data previously described. If there are no recent reported trades, the fair value of fixed maturity securities may be derived through the use of matrix pricing or model processes, where future cash flow expectations are developed based upon collateral performance and discounted at an estimated market rate. Significant inputs used to determine the fair value of obligations of states, municipalities and political subdivisions, corporate bonds and obligations of foreign governments include reported trades, benchmark yields, issuer spreads, bids, offers, credit information and estimated cash flows. Significant inputs used to determine the fair value of commercial mortgage-backed securities, residential mortgage-backed securities and asset-backed securities include the type of underlying assets, benchmark yields, prepayment speeds, collateral information, tranche type and volatility, estimated cash flows, credit information, default rates, recovery rates, issuer spreads and the year of issue.

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Due to the significance of unobservable inputs required in measuring the fair value of the Company's investments in certain insurance-linked securities funds, these investments are classified as Level 3 within the fair value hierarchy. The fair value of the securities is derived using their reported net asset value (NAV) as the primary input, as well as other observable and unobservable inputs as deemed necessary by management. Management has obtained an understanding of the inputs, assumptions, process and controls used to determine NAV, which is calculated by an independent third party. Unobservable inputs to the NAV calculations include assumptions around premium earnings patterns and loss reserve estimates for the underlying securitized reinsurance contracts. The Company's valuation policies and procedures for Level 3 investments are determined by management. Fair value measurements are analyzed quarterly to ensure the change in fair value from prior periods is reasonable relative to management's understanding of the underlying investments, recent market trends and external market data.

Senior long-term debt and other debt. Senior long-term debt and other debt is carried at amortized cost with the estimated fair value disclosed on the consolidated balance sheets. Senior long-term debt and other debt is classified as Level 2 within the fair value hierarchy due to variations in trading volumes and the lack of quoted market prices. Fair value is generally derived through recent reported trades, making adjustments through the reporting date, if necessary, based upon available market observable data including U.S. Treasury securities and implied credit spreads. Significant inputs used to determine the fair value of senior long-term debt and other debt include reported trades, benchmark yields, issuer spreads, bids and offers.

The following tables present the balances of assets measured at fair value on a recurring basis by level within the fair value hierarchy.

	December 31, 2022
(dollars in thousands)	Level 1		Level 2		Level 3		Total
Assets:
Investments:
Fixed maturity securities, available-for-sale:
U.S. Treasury securities	$	—	$	2,913,959	$	—	$	2,913,959
U.S. government-sponsored enterprises	—		765,538		—		765,538
Obligations of states, municipalities and political subdivisions	—		3,733,183		—		3,733,183
Foreign governments	—		1,306,778		—		1,306,778
Commercial mortgage-backed securities	—		1,940,448		—		1,940,448
Residential mortgage-backed securities	—		526,793		—		526,793
Asset-backed securities	—		1,640		—		1,640
Corporate bonds	—		668,496		—		668,496
Total fixed maturity securities, available-for-sale	—		11,856,835		—		11,856,835
Equity securities:
Insurance, banks and other financial institutions	2,952,689		—		899		2,953,588
Industrial, consumer and all other	4,718,324		—		—		4,718,324
Total equity securities	7,671,013		—		899		7,671,912
Short-term investments, available-for-sale	2,510,164		159,098		—		2,669,262
Total investments	$	10,181,177	$	12,015,933	$	899	$	22,198,009

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	December 31, 2021
(dollars in thousands)	Level 1		Level 2		Level 3		Total
Assets:
Investments:
Fixed maturity securities, available-for-sale:
U.S. Treasury securities	$	—	$	2,470,194	$	—	$	2,470,194
U.S. government-sponsored enterprises	—		775,587		—		775,587
Obligations of states, municipalities and political subdivisions	—		4,265,924		—		4,265,924
Foreign governments	—		1,519,354		—		1,519,354
Commercial mortgage-backed securities	—		1,990,433		—		1,990,433
Residential mortgage-backed securities	—		726,050		—		726,050
Asset-backed securities	—		3,081		—		3,081
Corporate bonds	—		836,682		—		836,682
Total fixed maturity securities, available-for-sale	—		12,587,305		—		12,587,305
Equity securities:
Insurance, banks and other financial institutions	3,307,755		—		56,472		3,364,227
Industrial, consumer and all other	5,659,700		—		—		5,659,700
Total equity securities	8,967,455		—		56,472		9,023,927
Short-term investments, available-for-sale	1,619,496		180,492		—		1,799,988
Total investments	$	10,586,951	$	12,767,797	$	56,472	$	23,411,220

The following table summarizes changes in Level 3 investments measured at fair value on a recurring basis.

(dollars in thousands)	2022		2021
Equity securities, beginning of period	$	56,472	$	58,493
Purchases	—		18,900
Sales	(56,335)		(15,015)
Net investment gains (losses)	762		(5,906)
Equity securities, end of period	$	899	$	56,472

Level 3 investments previously included the Company's investment in an insurance-linked securities fund managed by Markel CATCo Investment Management Ltd. (MCIM). In 2022, the Company's remaining investment was redeemed ($41.3 million) in conjunction with a buy-out transaction that provided for an accelerated return of all remaining capital to investors. See note 17 for further details about the Company's Markel CATCo operations and the buy-out transaction.

Except as disclosed in note 3 and note 8, the Company did not have any assets or liabilities measured at fair value on a non-recurring basis during the years ended December 31, 2022 and 2021.

6. Equity Method Investments

The Company holds certain investments that are accounted for under the equity method of accounting. The Company's equity method investments, which are included in other assets on the consolidated balance sheets, totaled $494.0 million and $459.7 million as of December 31, 2022 and 2021, respectively. The Company's proportionate share of earnings in its equity method investments was a loss of $22.9 million for the year ended December 31, 2022, income of $15.0 million for the year ended December 31, 2021 and a loss of $3.4 million for the year ended December 31, 2020.

The Company's most significant equity method investment is an investment in Hagerty, Inc. (Hagerty), which is accounted for on a quarter lag. Hagerty is an automotive enthusiast brand offering integrated membership products and programs as well as a specialty insurance provider focused on the global automobile enthusiast market. The Company's ownership interest in Hagerty was 23% as of December 31, 2022 and 2021. The Company's investment is comprised of Class A common shares, which are listed for trading on the New York Stock Exchange, as well as Class V common shares, associated with the

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Company's original investment, that have special voting rights and can be converted on a one-for-one basis into Class A common shares. The Company accounts for its investment under the equity method as it is deemed to have the ability to exercise significant influence over Hagerty's operating and financial policies through a combination of its voting interest, its right to designate a board member and business it conducts with Hagerty. As of December 31, 2022 and 2021, the carrying value of the Company's investment in Hagerty was $245.1 million and $256.6 million, respectively.

As of December 31, 2022 and 2021, the estimated value of the Company's investment, based on the closing stock price of Hagerty's Class A common shares, was $656.0 million and $1.1 billion, respectively. See note 18 for further details regarding related party transactions with Hagerty.

7. Receivables

The following table presents the components of receivables.

	December 31,
(dollars in thousands)	2022		2021
Insurance
Amounts receivable from agents, brokers and insureds	$	2,176,295	$	1,740,864
Other insurance	83,728		133,350
Markel Ventures	645,189		510,382
Other	77,961		50,379
	2,983,173		2,434,975
Allowance for credit losses	(22,117)		(21,037)
Receivables	$	2,961,056	$	2,413,938

8. Goodwill and Intangible Assets

The following table presents a rollforward of the components of goodwill by reportable segment.

(dollars in thousands)	Insurance		Reinsurance		Markel Ventures		Other(1)		Total
January 1, 2021	$	772,700	$	122,745	$	901,045	$	808,134	$	2,604,624
Acquisitions	—		—		293,838		—		293,838
Foreign currency movements and other adjustments	2,012		—		1,707		(3,041)		678
December 31, 2021 (2)	$	774,712	$	122,745	$	1,196,590	$	805,093	$	2,899,140
Acquisitions	—		—		41,905		—		41,905
Dispositions	—		—		—		(132,455)		(132,455)
Impairment of goodwill	—		—		—		(80,000)		(80,000)
Adjustments to preliminary purchase price allocation	—		—		(83,358)		—		(83,358)
Foreign currency movements and other adjustments	(3,084)		—		(1,228)		(2,082)		(6,394)
December 31, 2022 (2)	$	771,628	$	122,745	$	1,153,909	$	590,556	$	2,638,838

(1)    Amounts included in Other reflect the Company's operations that are not included in a reportable segment and are primarily related to the Company's program services and insurance-linked securities operations.

(2)    As of December 31, 2022, goodwill was net of accumulated impairment losses of $190.6 million, of which $171.9 million was in Other and $18.7 million was in Markel Ventures. As of December 31, 2021, goodwill was net of accumulated impairment losses of $110.6 million, of which $91.9 million was in Other and $18.7 million was in Markel Ventures.

The Company completed its annual tests for goodwill and indefinite-lived intangible asset impairment as of October 1, 2022 based upon results of operations through September 30, 2022. See note 1 for further details regarding impairment testing. Impairment of goodwill was $80.0 million for the year ended December 31, 2022. There was no impairment of goodwill during 2021 or 2020 and no impairment of indefinite-lived intangible assets during 2022, 2021 or 2020.

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The Company performed a quantitative impairment assessment for the Nephila reporting unit, which resulted in an $80.0 million impairment of goodwill, reducing the goodwill of the Nephila reporting unit to $221.8 million. The Company also evaluated the intangible assets within the Nephila reporting unit for impairment and determined they were not impaired.

The Company estimated the fair value of the Nephila reporting unit primarily using an income approach based on a discounted cash flow model. The cash flow projections used in the discounted cash flow model included the Company's best estimate of future growth and margins. The discount rates used to determine the fair value estimates were developed based on a capital asset pricing model using market-based inputs as well as an assessment of the inherent risk in projected future cash flows. The Company's fair value estimate was negatively impacted by an increase in the discount rate assumption in 2022, reflecting the increased cost of capital due to rising interest rates throughout 2022. Since acquiring Nephila in 2018, investment performance in the broader ILS market has been adversely impacted by consecutive years of elevated catastrophe losses, most recently with Hurricane Ian in 2022. These events, as well as recent volatility in the capital markets, have impacted investor decisions around allocation of capital to ILS, which in turn has impacted capital raises and redemptions within the funds Nephila manages. Following Hurricane Ian, Nephila has seen more favorable rates on the reinsurance contracts to which the Nephila Reinsurers subscribe, which is reflective of the current property catastrophe market and had a positive impact on Nephila's growth and performance projections. However, the impact of this favorable trend was more than offset by the impact of further declines in investor capital within the funds Nephila manages. Cash flow assumptions reflect the Company's best estimate of the reporting unit's future cash flows, based on information currently available, however, these assumptions are inherently uncertain, require a high degree of estimation and judgment and are subject to change depending on the outcome of future events.

The following table presents a rollforward of net intangible assets by reportable segment.

(dollars in thousands)	Underwriting(1)		Markel Ventures		Other(2)		Total
January 1, 2021	$	442,639	$	623,120	$	716,959	$	1,782,718
Acquisitions	—		203,879		—		203,879
Amortization of intangible assets	(41,182)		(57,568)		(61,789)		(160,539)
Foreign currency movements and other adjustments	(202)		(3,252)		(118)		(3,572)
December 31, 2021	$	401,255	$	766,179	$	655,052	$	1,822,486
Acquisitions	—		21,614		—		21,614
Dispositions	—		—		(2,716)		(2,716)
Amortization of intangible assets	(38,533)		(79,043)		(61,202)		(178,778)
Adjustments to preliminary purchase price allocation	—		86,773		—		86,773
Foreign currency movements and other adjustments	(400)		774		(2,289)		(1,915)
December 31, 2022	$	362,322	$	796,297	$	588,845	$	1,747,464

(1)    Amounts included in Underwriting reflect the intangible assets associated with the Company's underwriting segments, which are not allocated between the Insurance and Reinsurance segments.

(2)    Amounts included in Other reflect the Company's operations that are not included in a reportable segment and are primarily related to the Company's program services and insurance-linked securities operations.

Amortization of intangible assets is estimated to be $174.0 million for 2023, $172.1 million for 2024, $165.6 million for 2025, $157.5 million for 2026 and $149.9 million for 2027. Indefinite-lived intangible assets were $92.4 million at both December 31, 2022 and 2021.

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The following table presents the components of intangible assets.

	December 31,
	2022				2021
(dollars in thousands)	Gross Carrying Amount		Accumulated Amortization		Gross Carrying Amount		Accumulated Amortization
Customer relationships	$	1,425,330	$	(498,987)	$	1,379,739	$	(405,057)
Investment management agreements	464,000		(120,394)		468,000		(92,478)
Broker relationships	204,972		(117,386)		206,855		(109,210)
Trade names	293,194		(118,976)		238,331		(100,023)
Technology	113,170		(92,646)		113,200		(82,845)
Agent relationships	92,000		(34,756)		92,000		(28,622)
Insurance licenses	74,333		—		74,333		—
Renewal rights	21,449		(21,449)		21,449		(21,449)
Other	148,326		(84,716)		145,695		(77,432)
Total	$	2,836,774	$	(1,089,310)	$	2,739,602	$	(917,116)

9. Leases

The Company's leases primarily consist of operating leases for real estate and have remaining terms of up to 20 years. Total lease costs for operating leases were $126.3 million, $115.4 million and $94.4 million for the years ended December 31, 2022, 2021 and 2020, respectively.

The following table summarizes details for the Company's operating leases recorded on the consolidated balance sheets.

	December 31,
(dollars in thousands)	2022			2021
Right-of-use lease assets	$	526,704		$	533,702
Lease liabilities	$	554,394		$	571,337
Weighted average remaining lease term	11.7 years			10.8 years
Weighted average discount rate	3.1		%	3.0		%

The following table summarizes maturities of the Company's operating lease liabilities as of December 31, 2022, which reconciles to total operating lease liabilities included in other liabilities on the Company's consolidated balance sheet.

Years Ending December 31,	(dollars in thousands)
2023	$	100,887
2024	85,030
2025	71,474
2026	60,729
2027	51,702
2028 and thereafter	291,290
Total lease payments	661,112
Less imputed interest	(106,718)
Total operating lease liabilities	$	554,394

10. Products, Services and Other Revenues

The amount of revenues from contracts with customers for the years ended December 31, 2022, 2021 and 2020 was $4.8 billion, $3.8 billion and $2.9 billion, respectively.

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The following table presents revenues from contracts with customers by segment and type, all of which are included in products revenues and services and other revenues in the consolidated statements of income (loss) and comprehensive income (loss), along with a reconciliation to total products revenues and services and other revenues.

	Years Ended December 31,
	2022						2021						2020
(dollars in thousands)	Markel Ventures		Other		Total		Markel Ventures		Other		Total		Markel Ventures		Other		Total
Products	$	2,379,399	$	—	$	2,379,399	$	1,668,448	$	—	$	1,668,448	$	1,396,706	$	—	$	1,396,706
Services	2,265,413		43,875		2,309,288		1,863,706		134,850		1,998,556		1,295,734		116,476		1,412,210
Investment management	—		79,209		79,209		—		86,257		86,257		—		117,193		117,193
Total revenues from contracts with customers	4,644,812		123,084		4,767,896		3,532,154		221,107		3,753,261		2,692,440		233,669		2,926,109
Program services and other fronting	—		147,612		147,612		—		123,823		123,823		—		102,989		102,989
Disposition gains	—		225,828		225,828		—		—		—		—		—		—
Other	111,806		(16,621)		95,185		111,662		8,699		120,361		102,274		(2,316)		99,958
Total	$	4,756,618	$	479,903	$	5,236,521	$	3,643,816	$	353,629	$	3,997,445	$	2,794,714	$	334,342	$	3,129,056

Receivables from contracts with customers were $624.1 million and $626.1 million as of December 31, 2022 and 2021, respectively.

11. Unpaid Losses and Loss Adjustment Expenses

a) The following table presents a reconciliation of consolidated beginning and ending reserves for losses and loss adjustment expenses.

	Years Ended December 31,
(dollars in thousands)	2022		2021		2020
Gross reserves for losses and loss adjustment expenses, beginning of year	$	18,178,894	$	16,222,376	$	14,728,676
Reinsurance recoverables on unpaid losses, beginning of year	6,876,317		5,736,659		5,253,415
Net reserves for losses and loss adjustment expenses, beginning of year	11,302,577		10,485,717		9,475,261
Effect of foreign currency rate changes on beginning of year balance	(160,622)		(54,736)		68,368
Effect of adoption of ASC 326, Financial Instruments—Credit Losses	—		—		3,849
Adjusted net reserves for losses and loss adjustment expenses, beginning of year	11,141,955		10,430,981		9,547,478
Incurred losses and loss adjustment expenses:
Current accident year	4,613,035		4,061,000		4,073,325
Prior accident years	(167,446)		(478,930)		(606,414)
Total incurred losses and loss adjustment expenses	4,445,589		3,582,070		3,466,911
Payments:
Current accident year	580,537		637,169		749,887
Prior accident years	2,396,446		2,066,290		1,779,980
Total payments	2,976,983		2,703,459		2,529,867
Effect of foreign currency rate changes on current year activity	(5,468)		(4,253)		1,195
Net reserves for losses and loss adjustment expenses of Markel CATCo Re (see note 17)	347,921		—		—
Net reserves for losses and loss adjustment expenses of insurance companies sold	—		(2,762)		—
Net reserves for losses and loss adjustment expenses, end of year	12,953,014		11,302,577		10,485,717
Reinsurance recoverables on unpaid losses, end of year	7,994,884		6,876,317		5,736,659
Gross reserves for losses and loss adjustment expenses, end of year	$	20,947,898	$	18,178,894	$	16,222,376

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Catastrophe Losses

In 2022, current accident year losses and loss adjustment expenses included $46.2 million of net losses and loss adjustment expenses attributed to Hurricane Ian, all of which were within the Company's Insurance segment. These losses and loss adjustment expenses were net of ceded losses of $115.3 million. The Company also had gross losses and loss adjustment expenses of $850.0 million within its program services and other fronting operations attributed to Hurricane Ian, all of which were ceded to third-party reinsurers managed through the Company's insurance-linked securities operations, which hold sufficient investor collateral to support the Company's related reinsurance recoverables. See note 18 for further details regarding related party transactions with third parties managed through the Company's insurance-linked securities operations.

In 2021, current accident year losses and loss adjustment expenses included $195.0 million of net losses and loss adjustment expenses from Winter Storm Uri, European Floods and Hurricane Ida (2021 Catastrophes). The net losses and loss adjustment expenses on the 2021 Catastrophes for the year ended December 31, 2021 were net of ceded losses of $221.7 million.

In 2020, current accident year losses and loss adjustment expenses included $172.2 million of net losses and loss adjustment expenses from Hurricanes Isaias, Laura, Sally, Delta and Zeta, as well as wildfires in the western U.S. and the derecho in Iowa (2020 Catastrophes). The net losses and loss adjustment expenses on the 2020 Catastrophes for the year ended December 31, 2020 were net of ceded losses of $125.7 million.

Russia-Ukraine Conflict

In 2022, current accident year losses and loss adjustment expenses also included $35.7 million of net losses and loss adjustment expenses attributed to the Russia-Ukraine conflict. These losses and loss adjustment expenses were net of ceded losses of $44.3 million. The gross and net losses and loss adjustment expenses attributed to the Russia-Ukraine conflict represent the Company's best estimates as of December 31, 2022 based upon information currently available. The Company's estimates for these losses are based on reported claims, detailed underwriting, actuarial and claims reviews of policies and in-force assumed reinsurance contracts for potential exposures, as well as analysis of ceded reinsurance contracts and analysis provided by the Company's brokers and claims counsel. These estimates include various assumptions about what areas within the affected regions have incurred losses, the nature and extent of such losses, which remain difficult to verify, as well as assumptions about coverage, liability and reinsurance. Given the significant levels of ceded reinsurance on certain of the impacted policies, a significant portion of any additional incurred losses may be ceded. While the Company believes the gross and net reserves for losses and loss adjustment expenses for the Russia-Ukraine conflict as of December 31, 2022 are adequate based on information currently available, the Company continues to closely monitor reported claims, ceded reinsurance contract attachment, government actions and areas impacted by the conflict and may adjust its estimates as new information becomes available.

COVID-19 Losses

In 2020, current accident year losses and loss adjustment expenses included $358.3 million of net losses and loss adjustment expenses attributed to the COVID-19 pandemic. These losses and loss adjustment expenses were net of ceded losses of $106.2 million. In 2021, the Company increased its estimate of net losses and loss adjustments expenses by $15.7 million. In 2022, the Company decreased its estimate of net losses and loss adjustment expenses by $5.4 million.

The gross and net losses and loss adjustment expenses attributed to COVID-19 represent the Company's best estimates as of December 31, 2022 based upon information currently available. The Company's estimates are based on reported claims and still include assumptions about coverage, liability and ceded reinsurance contract attachment, which, in some cases, remain subject to judicial review. While the Company believes the gross and net reserves for losses and loss adjustment expenses for COVID-19 as of December 31, 2022 are adequate based on information available at this time, the Company continues to closely monitor reported claims, claim settlements, ceded reinsurance contract settlements and judicial decisions and may adjust its estimates as new information becomes available.

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b) Reserving Methodology

The Company uses a variety of techniques to establish the liabilities for unpaid losses and loss adjustment expenses based upon estimates of the ultimate amounts payable. The Company maintains reserves for specific claims incurred and reported (case reserves) and reserves for claims incurred but not reported (IBNR reserves), which include expected development on reported claims. The Company does not discount its reserves for losses and loss adjustment expenses to reflect estimated present value, except for reserves held for a run-off book of United Kingdom (U.K.) motor business. Additionally, reserves assumed in connection with an acquisition are recorded at fair value at the acquisition date. The fair value adjustment includes an adjustment to reflect the acquired reserves for losses and loss adjustment expenses at present value plus a risk premium, the net of which is amortized to losses and loss adjustment expenses within the consolidated statements of income.

As of any balance sheet date, all claims have not yet been reported, and some claims may not be reported for many years. As a result, the liability for unpaid losses and loss adjustment expenses includes significant estimates for incurred but not reported claims.

There is normally a time lag between when a loss event occurs and when it is reported to the Company. The actuarial methods that the Company uses to estimate losses have been designed to address the lag in loss reporting as well as the delay in obtaining information that would allow the Company to more accurately estimate future payments. There is also often a time lag between cedents establishing case reserves or re-estimating their reserves and notifying the Company of those new or revised case reserves. As a result, the reporting lag is more pronounced in reinsurance contracts than in the insurance contracts. On reinsurance transactions, the reporting lag will generally be 60 to 90 days after the end of a reporting period, but can be longer in some cases. There may also be a more pronounced reporting lag, as well as reliance on third-party claims handling practices and reserve estimates, on insurance contracts for which the Company is not the primary insurer and participates only in excess layers of loss. Based on the experience of the Company's actuaries and management, the Company selects loss development factors and trending techniques to mitigate the difficulties caused by reporting lags. At least annually, the Company evaluates its loss development factors and trending assumptions using its own loss data, as well as cedent-specific and industry data, and updates them as needed.

IBNR reserves are based on the estimated ultimate cost of settling claims, including the effects of inflation and other social and economic factors, using past experience adjusted for current trends and any other factors that would modify past experience. IBNR reserves are calculated by subtracting paid losses and loss adjustment expenses and case reserves from estimated ultimate losses and loss adjustment expenses. IBNR reserves were 70% of total unpaid losses and loss adjustment expenses at December 31, 2022 compared to 67% at December 31, 2021.

In establishing liabilities for unpaid losses and loss adjustment expenses, the Company's actuaries estimate an ultimate loss ratio, by accident year or underwriting year, for each product line with input from underwriting and claims personnel. For product lines in which loss reserves are established on an underwriting year basis, the Company has developed a methodology to convert from underwriting year to accident year for financial reporting purposes. In estimating an ultimate loss ratio for a particular line of business, the actuaries may use one or more actuarial reserving methods and select from these a single point estimate. To varying degrees, these methods include detailed statistical analysis of past claim reporting, settlement activity, claim frequency and severity, policyholder loss experience, industry loss experience and changes in market and economic conditions, policy forms and exposures. Greater judgment may be required when new product lines are introduced or when there have been changes in claims handling practices, as the statistical data available may be insufficient. Greater judgment also may be required for product lines that experience a low frequency of high severity claims, particularly when the Company is reliant on third party case reserve estimates and claims handling practices. These estimates also reflect implicit and explicit assumptions regarding the potential effects of external factors, including economic and social inflation, judicial decisions, changes in law, general economic conditions and recent trends in these factors. Management believes the process of evaluating past experience, adjusted for the effects of current developments and anticipated trends, is an appropriate basis for predicting future events.

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Estimates for losses from widespread catastrophic events, such as hurricanes and earthquakes, as well as pandemics and wars, are based on claims received to date, industry loss estimates and output from both industry, broker and proprietary models, as well as analysis of the Company's ceded reinsurance contracts. The Company may also perform detailed policy and reinsurance contract level reviews. The availability of data from these procedures varies depending on the timing of the event relative to the point at which the Company develops its estimates. The Company also considers loss experience on historical events that may have similar characteristics to the underlying event and current market conditions, including the level of economic inflation. Due to the inherent uncertainty in estimating such losses, these estimates are subject to variability, which increases with the severity and complexity of the underlying event. As additional claims are reported and paid, and industry loss estimates are revised, the Company incorporates this new information into its analysis and adjusts its estimate of ultimate losses and loss adjustment expenses as appropriate. For example, both the gross and net losses on Hurricane Ian and the 2021 and 2020 Catastrophes, as of December 31, 2022 represent the Company's best estimates based upon information currently available. For Hurricane Ian, these estimates are still dependent on assumptions about coverage, liability and reinsurance. While the Company believes the gross and net reserves for these events as of December 31, 2022 are adequate, it continues to closely monitor reported claims and may adjust its estimates as new information becomes available.

Loss reserves are established at management's best estimate, which is developed using the actuarially calculated point estimate as the starting point. The actuarial point estimate represents the actuaries' estimate of the most likely amount that will ultimately be paid to settle the losses that have occurred at a particular point in time; however, there is inherent uncertainty in the point estimate as it is the expected value in a range of possible reserve estimates. In some cases, actuarial analyses, which are generally based on statistical analysis, cannot fully incorporate all of the subjective factors that affect development of losses. In other cases, management's perspective of these more subjective factors may differ from the actuarial perspective. Subjective factors influencing the development of management's best estimate include: the credibility and timeliness of claims and loss information received from cedents and other third parties, economic and social inflation, judicial decisions, changes in law, changes in underwriting or claims handling practices, general economic conditions, the risk of moral hazard and other current and developing trends within the insurance and reinsurance markets, including the effects of competition. For example, the Company's loss experience in recent years has reflected higher than anticipated levels of economic inflation, as well as the impacts of social inflation.

Inherent in the Company's reserving practices is the desire to establish loss reserves that are more likely redundant than deficient, and therefore, will ultimately prove to be adequate. This approach to establishing loss reserves typically results in loss reserves that exceed the calculated actuarial point estimate. However, following an acquisition of insurance operations, acquired reserves initially are recorded at fair value, and therefore the acquired loss reserves may be closer to the actuarial point estimate until the Company builds total loss reserves that are consistent with the Company's historic level of confidence. Management continually attempts to improve its loss estimation process by refining its ability to analyze loss development patterns, claim payments and other information, but uncertainty remains regarding the potential for adverse development of estimated ultimate liabilities.

The Company's ultimate liability may be greater or less than current reserves. Changes in the Company's estimated ultimate liability for loss reserves generally occur as a result of the emergence of unanticipated loss activity, the completion of specific actuarial or claims studies or changes in internal or external factors that impact the assumptions used to derive the Company's estimates. The Company closely monitors new information on reported claims and uses statistical analyses prepared by its actuaries to evaluate the adequacy of recorded reserves. Management exercises judgment when assessing the relative credibility of loss development trends.

Management currently believes the Company's gross and net reserves are adequate. However, there is no precise method for evaluating the impact of any significant factor on the adequacy of reserves, and actual results will differ from original estimates.

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c) Prior Accident Year Loss Development

The following tables summarize, by segment, the product lines with the most significant changes in prior accident years loss reserves for the years ended December 31, 2022, 2021 and 2020, along with the corresponding accident years and the trends and factors that impacted management's best estimate of ultimate losses and loss adjustment expenses on underlying products in each of these product lines. The Company does not estimate losses at this level of aggregation as it offers a diverse portfolio of products and manages these products in logical groupings within each underwriting segment. As a result of the trends and factors described in the following tables, the Company's actuaries adjusted their estimates of the ultimate liability for unpaid losses and loss adjustment expenses. Additionally, for those product lines with favorable development on prior accident years loss reserves, management has now given more credibility to the favorable trends observed by the Company's actuaries and after also incorporating these favorable trends into its best estimate, reduced prior years loss reserves accordingly. The unfavorable claims and loss trends experienced on certain accident years within the Company's professional liability and general liability product lines in 2022 reflected broader market conditions, including the effects of economic and social inflation, as well as delays in court proceedings that began in 2020 and disrupted the development of the claims trend. These trends were most impactful on the 2018 and 2019 accident years for the professional liability product lines and the 2016 to 2019 accident years for the general liability product lines. Consistent with the Company's reserving philosophy, management is responding quickly to increase loss reserves following any indication of increased claims frequency or severity in excess of previous expectations.

	Year Ended December 31, 2022
(dollars in millions)	Loss Development		Accident Years with Most Significant Development	Trends and Factors Impacting Loss Estimates
Insurance segment:
Professional liability
2018 and 2019 accident years	$	121.0	2018 and 2019	Unfavorable claims settlements and increased claim frequency and severity, primarily on directors and officers, errors and omissions and employment practices liability lines
All other accident years	(91.1)		Several	More favorable loss experience and lower loss severity than previously anticipated
General liability
2016 to 2019 accident years	61.6		2016 to 2019	Unfavorable claims settlements and increased claim frequency and severity, primarily on contractors and excess and umbrella lines
All other accident years	(20.5)		Several	Lower loss frequency and severity than previously anticipated
Workers' compensation	(62.1)		2016 to 2021	Lower loss severity than previously anticipated
Programs	(48.3)		2020 and 2021	Lower than expected frequency of claims
Property	(48.1)		2020 and 2021	Lower loss severity than originally anticipated as well as favorable development on COVID-19
Credit and surety	(31.7)		2019 to 2021	Lower than expected frequency of claims
Other products	(23.7)
Total Insurance	(142.9)
Reinsurance segment:
Property	(29.2)		2017 to 2019	Favorable development on catastrophe events
Credit and surety	(22.9)		Several	Favorable commutations on mortgage insurance contracts
Premium adjustments	53.1		2020 and 2021	Recognition of additional exposures on prior accident years related to net favorable premium adjustments primarily on general liability, credit and surety and professional liability
Other products	(27.1)
Total Reinsurance	(26.1)
Other underwriting	1.6
Total decrease	$	(167.4)

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	Year Ended December 31, 2021
(dollars in millions)	Loss Development		Accident Years with Most Significant Development	Trends and Factors Impacting Loss Estimates
Insurance segment:
General liability	$	(139.7)	Several	Lower than expected frequency of claims and more favorable experience than originally anticipated across several sub-product lines
Property	(96.5)		2018 to 2020	Lower than expected frequency of large claims as well as favorable development on COVID-19 and catastrophe events
Workers' compensation	(79.0)		Several	Lower loss severity than originally anticipated
Marine and energy	(60.0)		2018 to 2020	Lower loss frequency and severity than originally anticipated
Professional liability	(54.7)		Several	Lower loss frequency and severity than originally anticipated
Other products	(76.4)
Total Insurance	(506.3)
Reinsurance segment:
Property	35.0		2020	Adverse development on COVID-19 and catastrophe events
Professional liability	29.2		Several	Recognition of additional exposures on prior accident years related to net favorable premium adjustments
General liability	(19.2)		2011, 2012, 2017 and 2020	Favorable development on COVID-19 and catastrophe events as well as lower than expected paid losses on reported claims
Credit and surety	(16.6)		2020	Favorable commutations on mortgage insurance contracts
Other products	(8.5)
Total Reinsurance	19.9
Other underwriting	6.6
Total decrease	$	(479.8)

	Year Ended December 31, 2020
(dollars in millions)	Loss Development		Accident Years with Most Significant Development	Trends and Factors Impacting Loss Estimates
Insurance segment:
General liability	$	(131.8)	Several	More favorable claims experience than originally anticipated across several sub-product lines
Professional liability	(128.9)		Several	More favorable claims experience than originally anticipated across several sub-product lines
Workers' compensation	(92.3)		2017 to 2019	Lower loss severity than originally anticipated
Marine and energy	(46.0)		2016 to 2019	Lower than expected frequency of claims
Other products	(155.6)
Total Insurance	(554.6)
Reinsurance segment:
Property	(68.4)		2017 to 2019	Lower than expected severity of claims
Public entity	34.4		2016 to 2019	Higher than expected frequency and severity of claims
Professional liability	21.0		2016 to 2019	Recognition of additional exposures on prior accident years related to net favorable premium adjustments and higher than expected loss severity and claims frequency
Other products	(38.8)
Total Reinsurance	(51.8)
Total decrease	$	(606.4)

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d) Historic Loss Development

The following tables present undiscounted loss development information, by accident year, for the Company's Insurance and Reinsurance segments, including cumulative incurred and paid losses and allocated loss adjustment expenses, net of reinsurance, as well as the corresponding amount of IBNR reserves as of December 31, 2022. This level of disaggregation is consistent with how the Company analyzes loss reserves for both internal and external reporting purposes. The loss development information for the years ended December 31, 2013 through 2021 is presented as supplementary information. All amounts included in the following tables related to transactions denominated in a foreign currency have been translated into U.S. Dollars using the exchange rates in effect at December 31, 2022.

The difference between the segment loss development implied by the tables for the year ended December 31, 2022 and actual losses and loss adjustment expenses recognized on prior accident years for the Insurance and Reinsurance segments for the year ended December 31, 2022 is primarily attributed to the fact that amounts presented in these tables exclude amounts attributed to the 2012 and prior accident years. Favorable development on 2012 and prior accident years for the year ended December 31, 2022 totaled $50.8 million and $36.9 million for the Insurance and Reinsurance segments and reflects modest favorable development across many of the Company's product lines on accident years prior to 2013.

The remaining difference between the segment loss development implied by the tables for the year ended December 31, 2022 and actual losses and loss adjustment expenses on prior accident years is attributed to the fact that amounts presented in these tables exclude unallocated loss adjustment expenses and exclude amounts attributable to reserve discounting and fair value adjustments recorded in conjunction with acquisitions, as well as differences in the presentation of foreign currency movements, as previously described, none of which are material to the Insurance or Reinsurance segments.

The Insurance segment table that follows also includes claim frequency information, by accident year. The Company defines a claim as a single claim incident, per policy, which may include multiple claimants and multiple coverages on a single policy. Claim counts include claims closed without a payment as well as claims where the Company is monitoring to determine if an exposure exists, even if a reserve has not been established.

All of the business contained within the Company's Reinsurance segment represents treaty business that is assumed from other insurance or reinsurance companies, for which the Company does not have access to the underlying claim counts. Further, this business includes both quota share and excess of loss treaty reinsurance, through which only a portion of each reported claim results in losses to the Company. As such, the Company has excluded claim count information from the Reinsurance segment disclosures.

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Insurance Segment

(dollars in millions)	Ultimate Incurred Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance																				Total of Incurred-but-Not-Reported Liabilities, Net of Reinsurance		Cumulative Number of Reported Claims
	Unaudited																		As of December 31,
	As of December 31,
Accident Year	2013		2014		2015		2016		2017		2018		2019		2020		2021		2022		December 31, 2022
2013	$	1,724.9	$	1,683.4	$	1,514.7	$	1,452.6	$	1,406.2	$	1,360.8	$	1,315.6	$	1,296.6	$	1,292.8	$	1,283.7	$	43.3	91,000
2014			1,850.8		1,680.7		1,613.0		1,556.8		1,508.6		1,487.4		1,455.2		1,457.7		1,438.2		52.8		86,000
2015					1,769.1		1,695.0		1,571.9		1,517.8		1,487.2		1,455.2		1,451.2		1,442.2		65.9		89,000
2016							1,858.0		1,854.2		1,756.3		1,703.9		1,677.1		1,669.8		1,682.3		86.9		101,000
2017									2,312.1		2,179.6		2,061.0		2,018.2		2,004.7		2,023.7		103.5		139,000
2018											2,432.4		2,325.5		2,099.9		2,061.6		2,153.7		194.9		193,000
2019													2,556.6		2,299.1		2,244.4		2,295.5		335.6		228,000
2020															3,083.4		2,974.7		2,914.7		1,042.6		179,000
2021																	3,085.7		2,909.0		1,483.0		137,000
2022																			4,097.4		2,791.3		121,000
Total																			$	22,240.4
	Cumulative Paid Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance
	Unaudited																		As of December 31,
	As of December 31,
Accident Year	2013		2014		2015		2016		2017		2018		2019		2020		2021		2022
2013	$	270.2	$	568.9	$	774.9	$	943.8	$	1,031.6	$	1,092.9	$	1,116.4	$	1,150.2	$	1,163.9	$	1,178.2
2014			329.6		652.6		886.6		1,052.9		1,157.3		1,240.4		1,288.8		1,308.8		1,339.9
2015					321.0		660.7		870.9		1,034.0		1,142.1		1,230.9		1,260.6		1,293.0
2016							370.3		747.4		975.4		1,160.0		1,288.3		1,351.9		1,427.5
2017									436.0		983.9		1,275.6		1,511.1		1,620.1		1,741.0
2018											492.2		1,019.3		1,346.9		1,498.3		1,674.8
2019													523.9		1,082.4		1,261.4		1,574.1
2020															807.8		1,150.9		1,518.1
2021																	474.3		988.5
2022																			834.4
Total																			$	13,569.5
All outstanding liabilities for unpaid losses and loss adjustment expenses before 2013, net of reinsurance																			237.4
Total liabilities for unpaid losses and loss adjustment expenses, net of reinsurance																			$	8,908.3

Variability in claim counts is primarily attributable to claim counts associated with a personal lines product with high claim frequency and low claim severity, which the Company did not write from 2014 to 2016. The related net incurred losses and allocated loss adjustment expenses are not material to the Insurance segment.

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Reinsurance Segment

	Ultimate Incurred Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance																				Total of Incurred-but-Not-Reported Liabilities, Net of Reinsurance
	Unaudited																		As of December 31,
(dollars in millions)	As of December 31,
Accident Year	2013		2014		2015		2016		2017		2018		2019		2020		2021		2022		December 31, 2022
2013	$	579.4	$	571.8	$	538.3	$	525.4	$	533.2	$	496.1	$	478.2	$	480.0	$	475.3	$	476.9	$	32.7
2014			569.2		552.1		524.4		563.1		542.2		519.3		503.8		505.3		501.2		60.3
2015					523.1		508.8		523.7		515.0		503.9		498.6		486.3		486.6		84.4
2016							509.1		518.5		519.0		516.9		526.8		550.9		554.3		69.8
2017									895.7		928.7		934.7		936.0		908.2		920.4		105.6
2018											749.5		775.3		767.9		772.1		767.8		150.7
2019													662.0		675.6		689.2		702.7		223.4
2020															680.2		732.7		742.4		344.0
2021																	735.5		736.7		446.9
2022																			662.6		614.1
Total																			$	6,551.6
	Cumulative Paid Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance
	Unaudited																		As of December 31,
	As of December 31,
Accident Year	2013		2014		2015		2016		2017		2018		2019		2020		2021		2022
2013	$	70.6	$	153.4	$	205.5	$	263.2	$	295.6	$	324.9	$	343.3	$	358.1	$	369.5	$	383.4
2014			97.4		155.6		220.5		267.0		302.9		335.7		352.9		369.3		379.4
2015					63.6		131.2		202.0		252.7		299.6		324.1		343.7		360.3
2016							79.0		167.9		237.9		294.3		346.0		379.4		419.5
2017									157.4		358.1		479.2		560.9		624.5		693.5
2018											87.0		243.7		344.7		414.4		484.5
2019													53.5		173.6		268.4		359.6
2020															93.5		203.7		309.8
2021																	79.5		187.8
2022																			24.2
Total																			$	3,602.0
All outstanding liabilities for unpaid losses and loss adjustment expenses before 2013, net of reinsurance																			388.0
Total liabilities for unpaid losses and loss adjustment expenses, net of reinsurance																			$	3,337.6

The following table presents supplementary information about average historical claims duration as of December 31, 2022 based on the cumulative incurred and paid losses and allocated loss adjustment expenses presented above.

	Average Annual Percentage Payout of Incurred Losses by Age (in Years), Net of Reinsurance
Unaudited	1		2		3		4		5		6		7		8		9		10
Insurance	22.0	%	21.9	%	13.8	%	11.3	%	7.1	%	5.3	%	2.9	%	2.1	%	1.6	%	1.1	%
Reinsurance	12.5	%	16.4	%	13.1	%	10.4	%	8.2	%	6.3	%	4.6	%	3.3	%	2.2	%	2.9	%

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The following table reconciles the net incurred and paid loss development tables to the liability for losses and loss adjustment expenses on the consolidated balance sheet.

(dollars in thousands)	December 31, 2022
Net outstanding liabilities
Insurance segment	$	8,908,308
Reinsurance segment	3,337,587
Other underwriting	89,563
Program services and other fronting	9,982
Markel CATCo Re (see note 17)	347,921
Liabilities for unpaid losses and loss adjustment expenses, net of reinsurance	12,693,361
Reinsurance recoverable on unpaid losses
Insurance segment	2,425,560
Reinsurance segment	277,854
Other underwriting	56,968
Program services and other fronting	5,234,502
Total reinsurance recoverable on unpaid losses	7,994,884
Unallocated loss adjustment expenses	326,275
Unamortized discount, net of acquisition fair value adjustments, included in unpaid losses and loss adjustment expenses	(66,622)
	259,653
Total gross liability for unpaid losses and loss adjustment expenses	$	20,947,898

e) The Company has exposure to asbestos and environmental (A&E) claims primarily resulting from policies written by acquired insurance operations before their acquisition by the Company. The Company's exposure to A&E claims originated from umbrella, excess and commercial general liability insurance policies and assumed reinsurance contracts that were written on an occurrence basis from the 1970s to mid-1980s. Exposure also originated from claims-made policies that were designed to cover environmental risks provided that all other terms and conditions of the policy were met. A&E claims include property damage and clean-up costs related to pollution, as well as personal injury allegedly arising from exposure to hazardous materials. Development on A&E loss reserves is monitored separately from the Company's ongoing underwriting operations and is not included in a reportable segment.

At December 31, 2022, A&E reserves were $153.2 million and $54.5 million on a gross and net basis, respectively. At December 31, 2021, A&E reserves were $218.6 million and $66.2 million on a gross and net basis, respectively.

The Company's reserves for losses and loss adjustment expenses related to A&E exposures represent management's best estimate of ultimate settlement values based on statistical analysis of these reserves by the Company's actuaries. A&E exposures are subject to significant uncertainty due to potential loss severity and frequency resulting from the uncertain and unfavorable legal climate. A&E reserves could be subject to increases in the future, however, management believes the Company's gross and net A&E reserves at December 31, 2022 are adequate.

12. Reinsurance

In reinsurance and retrocession transactions, an insurance or reinsurance company transfers, or cedes, all or part of its exposure in return for a premium. The ceding of insurance does not legally discharge the Company from its primary liability for the full amount of the policies, and the Company will be required to pay the loss and bear collection risk if the reinsurer fails to meet its obligations under the reinsurance or retrocessional agreement. A credit risk exists with ceded reinsurance to the extent that any reinsurer is unable to meet the obligations assumed under the reinsurance or retrocessional contracts. Allowances are established for credit losses expected to be recognized over the life of the reinsurance recoverables.

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Within its underwriting operations, the Company uses reinsurance and retrocessional reinsurance to manage its net retention on individual risks and overall exposure to losses while providing it with the ability to offer policies with sufficient limits to meet policyholder needs.

Within the Company's underwriting operations, at December 31, 2022 and 2021, balances recoverable from the ten largest reinsurers, by group, represented 62% and 63%, respectively, of reinsurance recoverables before considering reinsurance allowances and collateral. At December 31, 2022, the largest reinsurance balance was due from RenaissanceRe and represented 11% of reinsurance recoverables before considering reinsurance allowances and collateral.

Within its program services and other fronting businesses, the Company generally enters into quota share reinsurance agreements whereby the Company cedes to the capacity providers (reinsurers) substantially all of its gross liability under all policies issued by and on behalf of the Company by a general agent. However, there are certain programs that contain limits on the reinsurers' obligations to the Company that expose the Company to underwriting risk, including loss ratio caps, exclusions of the credit risk of producers and aggregate reinsurance limits that the Company believes are unlikely to be exceeded. The Company also remains exposed to the credit risk of the reinsurer, or the risk that one of its reinsurers becomes insolvent or otherwise unable or unwilling to pay policyholder claims. This credit risk is generally mitigated by either selecting well capitalized, highly rated authorized capacity providers or requiring that the capacity provider post substantial collateral to secure the reinsured risks, which, in some instances, exceeds the related reinsurance recoverable.

Within the Company's program services business, at December 31, 2022 and 2021, balances recoverable from the ten largest reinsurers, by group, represented 67% and 68%, respectively, of reinsurance recoverables before considering reinsurance allowances and collateral. At December 31, 2022, the largest reinsurance balance was due from Lloyd's of London (Lloyd's) and represented 13% of reinsurance recoverables before considering reinsurance allowances and collateral. All of the Company's other fronting business is conducted on behalf of its Nephila ILS operations; therefore, all of the reinsurance recoverables within these operations are attributable to entities it manages. See note 18.

The following tables summarize the effect of reinsurance and retrocessional reinsurance on premiums written and earned.

	Year Ended December 31, 2022
(dollars in thousands)	Direct		Assumed		Ceded		Net Premiums
Underwriting:
Written	$	8,085,812	$	1,761,726	$	(1,640,165)	$	8,207,373
Earned	$	7,379,766	$	1,589,920	$	(1,378,191)	$	7,591,495
Program services and other fronting:
Written	2,644,138		710,006		(3,358,127)		(3,983)
Earned	2,688,804		656,885		(3,349,392)		(3,703)
Consolidated:
Written	$	10,729,950	$	2,471,732	$	(4,998,292)	$	8,203,390
Earned	$	10,068,570	$	2,246,805	$	(4,727,583)	$	7,587,792

	Year Ended December 31, 2021
(dollars in thousands)	Direct		Assumed		Ceded		Net Premiums
Underwriting:
Written	$	6,863,229	$	1,622,700	$	(1,360,763)	$	7,125,166
Earned	$	6,275,078	$	1,482,755	$	(1,250,392)	$	6,507,441
Program services and other fronting:
Written	2,644,955		307,798		(2,958,188)		(5,435)
Earned	2,453,990		261,591		(2,719,993)		(4,412)
Consolidated:
Written	$	9,508,184	$	1,930,498	$	(4,318,951)	$	7,119,731
Earned	$	8,729,068	$	1,744,346	$	(3,970,385)	$	6,503,029

10K - 111

	Year Ended December 31, 2020
(dollars in thousands)	Direct		Assumed		Ceded		Net Premiums
Underwriting:
Written	$	5,715,038	$	1,444,967	$	(1,222,390)	$	5,937,615
Earned	$	5,357,888	$	1,394,239	$	(1,134,501)	$	5,617,626
Program services and other fronting:
Written	2,038,743		67,917		(2,112,037)		(5,377)
Earned	2,084,888		74,847		(2,165,156)		(5,421)
Consolidated:
Written	$	7,753,781	$	1,512,884	$	(3,334,427)	$	5,932,238
Earned	$	7,442,776	$	1,469,086	$	(3,299,657)	$	5,612,205

Substantially all of the premiums written and earned in the Company's program services and other fronting operations for the years ended December 31, 2022, 2021 and 2020 were ceded. The percentage of consolidated ceded earned premiums to gross earned premiums was 38%, 38% and 37% for the years ended December 31, 2022, 2021 and 2020, respectively. The percentage of consolidated assumed earned premiums to net earned premiums was 30%, 27% and 26% for the years ended December 31, 2022, 2021 and 2020, respectively.

Substantially all of the incurred losses and loss adjustment expenses in the Company's program services and other fronting operations were ceded. These losses totaled $3.0 billion and $2.5 billion for the years ended December 31, 2022 and 2021, respectively.

The following table summarizes the effect of reinsurance and retrocessional reinsurance on losses and loss adjustment expenses in the Company's underwriting operations.

	Years ended December 31,
(dollars in thousands)	2022		2021		2020
Gross losses and loss adjustment expenses	$	5,281,424	$	4,477,752	$	4,189,948
Ceded losses and loss adjustment expenses	(834,648)		(893,230)		(722,619)
Net losses and loss adjustment expenses	$	4,446,776	$	3,584,522	$	3,467,329

13. Life and Annuity Benefits

The following table presents reserves for life and annuity benefits.

	December 31,
(dollars in thousands)	2022		2021
Life	$	102,321	$	113,797
Annuities	628,441		753,971
Accident and health	28,263		35,212
Total	$	759,025	$	902,980

Life and annuity benefit reserves are compiled on a reinsurance contract-by-contract basis and are discounted using standard actuarial techniques and cash flow models. Since the development of the life and annuity reinsurance reserves is based upon cash flow projection models, the Company must make estimates and assumptions based on cedent experience, industry mortality tables, and expense and investment experience, including a provision for adverse deviation. The assumptions used to determine policy benefit reserves are generally locked-in for the life of the contract unless an unlocking event occurs. Loss recognition testing is performed to determine if existing policy benefit reserves, together with the present value of future gross premiums and expected investment income earned thereon, are adequate to cover the present value of future benefits, settlement and maintenance costs. If the existing policy benefit reserves are not sufficient, the locked-in assumptions are revised to current best estimate assumptions and a charge to earnings for life and annuity benefits is recognized at that time. See note 1(x) for information on changes to the accounting for life and annuity benefits beginning in 2023.

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Life and annuity benefit reserves are also adjusted to the extent unrealized gains on the investments supporting the policy benefit reserves would result in a reserve deficiency if those gains were realized. As of December 31, 2021, the cumulative increase to life and annuity benefits attributable to unrealized gains on the underlying investment portfolio totaled $56.6 million, all of which reversed in 2022 as a result of an increase in the market yield on the investment securities supporting the policy benefit reserves. During 2021, the Company decreased life and annuity benefits by $63.0 million, reflecting an increase in the market yield on the investment securities supporting the policy benefit reserves, and increased the change in net unrealized holding gains included in other comprehensive loss by a corresponding amount. During 2020, the Company increased life and annuity benefits by $68.2 million, as a result of a decrease in the market yield on the investment securities supporting the policy benefit reserves, and decreased the change in net unrealized holding gains included in other comprehensive income by a corresponding amount.

Because of the assumptions and estimates used in establishing the Company's reserves for life and annuity benefit obligations and the long-term nature of these reinsurance contracts, the ultimate liability may be greater or less than the estimates. The average discount rate for the life and annuity benefit reserves was 2.3% as of December 31, 2022.

As of December 31, 2022, the largest life and annuity benefits reserve for a single contract was 33.7% of the total.

None of the annuities included in life and annuity benefits on the consolidated balance sheets are subject to discretionary withdrawal.

14. Senior Long-Term Debt and Other Debt

The following table summarizes the Company's senior long-term debt and other debt.

	December 31,
(dollars in thousands)	2022		2021
4.90% unsecured senior notes, due July 1, 2022, interest payable semi-annually, net of unamortized discount of $159 in 2021	$	—	$	349,815
3.625% unsecured senior notes, due March 30, 2023, interest payable semi-annually, net of unamortized discount of $50 in 2022 and $251 in 2021	249,940		249,702
3.50% unsecured senior notes, due November 1, 2027, interest payable semi-annually, net of unamortized discount of $1,161 in 2022 and $1,445 in 2021	298,502		298,136
3.35% unsecured senior notes, due September 17, 2029, interest payable semi-annually, net of unamortized discount of $1,668 in 2022 and $1,916 in 2021	297,997		297,700
7.35% unsecured senior notes, due August 15, 2034, interest payable semi-annually, net of unamortized discount of $800 in 2022 and $868 in 2021	129,004		128,932
5.0% unsecured senior notes, due March 30, 2043, interest payable semi-annually, net of unamortized discount of $4,535 in 2022 and $4,759 in 2021	245,214		244,978
5.0% unsecured senior notes, due April 5, 2046, interest payable semi-annually, net of unamortized discount of $5,689 in 2022 and $5,933 in 2021	493,585		493,310
4.30% unsecured senior notes, due November 1, 2047, interest payable semi-annually, net of unamortized discount of $3,669 in 2022 and $3,821 in 2021	295,691		295,512
5.0% unsecured senior notes, due May 20, 2049, interest payable semi-annually, net of unamortized discount of $6,900 in 2022 and $7,161 in 2021	591,927		591,621
4.15% unsecured senior notes, due September 17, 2050, interest payable semi-annually, net of unamortized discount of $4,917 in 2022 and $5,095 in 2021	494,342		494,138
3.45% unsecured senior notes, due May 7, 2052, interest payable semi-annually, net of unamortized discount of $8,182 in 2022 and $8,461 in 2021	590,689		590,378
Other debt, at various interest rates ranging from 2.1% to 9.9%	416,738		327,044
Senior long-term debt and other debt	$	4,103,629	$	4,361,266

In May 2021, the Company issued $600 million of 3.45% unsecured senior notes due May 2052. Net proceeds to the Company were $591.4 million, before expenses. The Company used a portion of these proceeds to retire its 4.90% unsecured senior notes due July 1, 2022 ($350.0 million aggregate principal outstanding at December 31, 2021).

The Company's 7.35% unsecured senior notes due August 15, 2034 are not redeemable. The Company's other unsecured senior notes are redeemable by the Company at any time, subject to payment of a make-whole premium to the noteholders. None of the Company's senior long-term debt is subject to any sinking fund requirements.

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The Company's other debt includes $414.1 million and $287.6 million associated with its Markel Ventures subsidiaries as of December 31, 2022 and 2021, respectively, which includes amounts outstanding on their respective credit facilities. The Markel Ventures debt is non-recourse to the holding company and generally is secured by the assets of those subsidiaries.

Various of the Company's Markel Ventures subsidiaries maintain revolving credit facilities or lines of credit, which provide up to $620 million of aggregate capacity for working capital and other general operational purposes. A portion of the capacity on certain of these credit facilities may be used as security for letters of credit and other obligations. At December 31, 2022 and 2021, $238.1 million and $94.3 million, respectively, of borrowings were outstanding under these credit facilities. As of December 31, 2022, one of the Company's Markel Ventures subsidiaries was not in compliance with certain financial covenants of its revolving credit facility, which had an outstanding balance of $97.9 million as of December 31, 2022. The subsidiary is working with its lenders and anticipates amending the facility. This event is not expected to have a material effect on the Company’s consolidated financial condition or results of operations. At December 31, 2022, all of the Company's other subsidiaries were in compliance with all covenants contained in their respective credit facilities.

The estimated fair value of the Company's senior long-term debt and other debt was $3.5 billion and $5.0 billion at December 31, 2022 and 2021, respectively.

The following table summarizes the future principal payments due at maturity on senior long-term debt and other debt as of December 31, 2022.

Years Ending December 31,	(dollars in thousands)
2023	$	399,604
2024	27,180
2025	24,934
2026	25,637
2027	444,335
2028 and thereafter	3,226,317
Total principal payments	$	4,148,007
Net unamortized discount	(37,572)
Net unamortized debt issuance costs	(6,806)
Senior long-term debt and other debt	$	4,103,629

The Company maintains a corporate revolving credit facility which provides up to $300 million of capacity for future acquisitions, investments and stock repurchases, and for other working capital and general corporate purposes. At the Company's discretion, up to $200 million of the total capacity may be used for letters of credit. The Company may increase the capacity of the facility by up to $200 million subject to obtaining commitments for the increase and certain other terms and conditions. The Company pays interest on balances outstanding under the facility and a utilization fee for letters of credit issued under the facility. The Company also pays a commitment fee (0.20% at December 31, 2022) on the unused portion of the facility based on the Company's leverage ratio as calculated under the credit agreement. The credit agreement includes financial covenants that require that the Company not exceed a maximum leverage ratio and maintain a minimum amount of consolidated net worth, as well as other customary covenants and events of default. At December 31, 2022 and 2021, the Company had no borrowings outstanding under this revolving credit facility. This facility expires in April 2024. As of December 31, 2022, the Company was in compliance with all covenants contained in its corporate revolving credit facility.

To the extent that the Company or any of its subsidiaries are not in compliance with the covenants under their respective credit facilities, access to such credit facilities could be restricted.

The Company paid $197.3 million, $178.6 million and $178.2 million in interest on its senior long-term debt and other debt during the years ended December 31, 2022, 2021 and 2020, respectively.

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15. Income Taxes

Income (loss) before income taxes includes the following components, based on country of domicile.

	Years Ended December 31,
(dollars in thousands)	2022		2021		2020
U.S. operations	$	(109,311)	$	2,263,748	$	1,003,714
Foreign operations	(39,528)		868,445		(3,265)
Income (loss) before income taxes	$	(148,839)	$	3,132,193	$	1,000,449

Income tax expense (benefit) includes the following components, based on the taxing authority to which taxes are paid. The Company's most significant U.K. and Bermuda subsidiaries have elected to be taxed as domestic corporations for U.S. tax purposes. U.S. income tax also includes state income tax expense, which is not material to the consolidated financial statements.

	Years Ended December 31,
(dollars in thousands)	2022		2021		2020
Current:
U.S. income tax	$	222,074	$	200,742	$	182,046
Foreign income tax	12,042		29,811		(10,631)
Total current tax expense	234,116		230,553		171,415
Deferred:
U.S. income tax	(300,850)		438,240		(557)
Foreign income tax	19,098		15,665		(2,176)
Total deferred tax expense (benefit)	(281,752)		453,905		(2,733)
Income tax expense (benefit)	$	(47,636)	$	684,458	$	168,682

For foreign subsidiaries that the Company has not elected to treat as domestic corporations for U.S. tax purposes, the Company is subject to the U.S. Global Intangible Low Taxes Income (GILTI) tax. The Company recognizes the impact of the GILTI tax as incurred, and for the years ended December 31, 2022, 2021 and 2020, GILTI tax was not material to the consolidated financial statements. Additionally, U.S. income taxes have not been recognized on any undistributed earnings of the Company's foreign subsidiaries that are considered indefinitely reinvested, the amount of which is not material to the consolidated financial statements.

The Company made net income tax payments of $251.5 million, $204.9 million and $241.7 million in 2022, 2021 and 2020, respectively. Income taxes payable were $2.2 million and $31.3 million at December 31, 2022 and 2021, respectively, and were included in other liabilities on the consolidated balance sheets. Income taxes receivable were $9.9 million and $18.9 million at December 31, 2022 and 2021, respectively, and were included in other assets on the consolidated balance sheets.

The following table presents a reconciliation of the Company's income taxes using the U.S. corporate income tax rate to the Company's income tax expense (benefit).

	Years Ended December 31,
(dollars in thousands)	2022				2021				2020
U.S. corporate tax rate	$	(31,256)	21.0	%	$	657,760	21.0	%	$	210,093	21.0	%
Increase (decrease) resulting from:
Tax-exempt investment income	(16,063)		10.8		(16,109)		(0.5)		(16,415)		(1.6)
Foreign operations	5,335		(3.6)		14,443		0.5		6,500		0.6
Impairment of goodwill	16,800		(11.3)		—		0.0		—		0.0
Markel CATCo Re income not subject to tax	(18,871)		12.7		—		0.0		—		0.0
Nondeductible (deductible) losses on certain foreign investments	(160)		0.1		1,240		0.0		(38,666)		(3.9)
Other	(3,421)		2.3		27,124		0.9		7,170		0.7
Income tax expense (benefit)	$	(47,636)	32.0	%	$	684,458	21.9	%	$	168,682	16.8	%

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The following table presents the components of domestic and foreign deferred tax assets and liabilities.

	December 31,
(dollars in thousands)	2022		2021
Assets:
Unpaid losses and loss adjustment expenses	$	170,518	$	186,759
Unearned premiums	161,243		139,350
Lease liabilities	132,735		135,795
Life and annuity benefits	54,893		78,777
Accrued incentive compensation	39,469		50,806
Net operating loss carryforwards	25,305		47,510
Tax credit carryforwards	18,264		21,734
Other differences between financial reporting and tax bases	65,250		66,951
Total gross deferred tax assets	667,677		727,682
Less valuation allowance	(16,943)		(23,352)
Total gross deferred tax assets, net of allowance	650,734		704,330
Liabilities:
Investments	761,421		1,401,871
Goodwill and other intangible assets	180,186		185,195
Deferred policy acquisition costs	161,220		146,601
Property, plant and equipment	144,259		126,846
Right-of-use lease assets	127,398		127,313
Other differences between financial reporting and tax bases	113,065		129,866
Total gross deferred tax liabilities	1,487,549		2,117,692
Net deferred tax liability	$	836,815	$	1,413,362

Deferred tax assets and liabilities are recorded on the consolidated balance sheets on a net basis by taxing jurisdiction. As of December 31, 2022 and 2021, the Company's consolidated balance sheets included net deferred tax liabilities of $874.0 million and $1.4 billion, respectively, in other liabilities and net deferred tax assets of $37.2 million and $18.4 million, respectively, in other assets.

At December 31, 2022, the Company had tax credit carryforwards of $18.3 million, substantially all of which related to foreign tax credits to be used against U.S. income tax. The Company expects to utilize all tax credit carryforwards before expiration. The earliest any of these credits will expire is 2031.

At December 31, 2022, the Company also had net operating losses of $82.0 million that can be used to offset future taxable income, most of which is attributable to losses of certain branch operations in Europe incurred in their local jurisdictions. The Company's ability to use the majority of these losses is not subject to expiration. As described below, the deferred tax assets related to losses at certain of the Company's subsidiaries and branches are offset by valuation allowances.

At December 31, 2022, the Company had total gross deferred tax assets of $667.7 million. The Company has a valuation allowance of $16.9 million to offset gross deferred tax assets primarily attributable to cumulative net operating losses at certain of the Company's subsidiaries and branches. The Company believes that it is more likely than not that it will realize the remaining $650.7 million of gross deferred tax assets through generating taxable income or the reversal of existing temporary differences attributable to the gross deferred tax liabilities. Additionally, the Company's net deferred tax liability for investments includes deferred tax assets attributed to its unrealized losses on fixed maturity securities. The Company has the ability and intent to execute a tax planning strategy such that it is more likely than not that all of these deferred tax assets will be realized.

At December 31, 2022, the Company did not have any material unrecognized tax benefits. The Company does not anticipate any changes in unrecognized tax benefits during 2023 that would have a material impact on the Company's income tax provision.

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The Company is subject to income tax in the U.S. and in foreign jurisdictions. The Internal Revenue Service is currently examining the Company's 2017 U.S. federal income tax return. The Company believes its income tax liabilities are adequate as of December 31, 2022, however, these liabilities could be adjusted as a result of this examination. With few exceptions, the Company is no longer subject to income tax examination by tax authorities for years ended before January 1, 2017.

16. Employee Benefit Plans

a) The Company maintains defined contribution plans for employees of its U.S. insurance operations in accordance with Section 401(k) of the U.S. Internal Revenue Code of 1986. Employees of the Company's Markel Ventures subsidiaries are provided post-retirement benefits under separate defined contribution plans. The Company also provides various defined contribution plans for employees of its international insurance operations, which are in line with local market terms and conditions of employment. Expenses relating to the Company's defined contribution plans were $57.9 million, $52.7 million and $48.6 million in 2022, 2021 and 2020, respectively.

b) The Terra Nova Pension Plan is a defined benefit plan that covers certain employees in the Company's international insurance operations who meet the eligibility conditions set out in the plan. The plan has been closed to new participants since 2001, and employees have not accrued benefits for future service in the plan since April 2012. The projected benefit obligations of the Terra Nova Pension Plan as of December 31, 2022 and 2021 were $108.5 million and $210.2 million, respectively, and the related fair value of plan assets was $171.7 million and $243.6 million, respectively. The corresponding net asset for pension benefits, also referred to as the funded status of the plan, at December 31, 2022 and 2021 was included in other assets on the Company's consolidated balance sheets.

17. Variable Interest Entities

MCIM, a wholly-owned consolidated subsidiary of the Company, is an insurance-linked securities investment fund manager and reinsurance manager headquartered in Bermuda. Results attributable to MCIM are not included in a reportable segment.

MCIM serves as the insurance manager for Markel CATCo Re Ltd. (Markel CATCo Re), a Bermuda Class 3 reinsurance company, and as the investment manager for Markel CATCo Reinsurance Fund Ltd., a Bermuda exempted mutual fund company comprised of multiple segregated accounts (Markel CATCo Funds). Voting shares in Markel CATCo Reinsurance Fund Ltd. and Markel CATCo Re are held by MCIM, which has the power to direct the activities that most significantly impact the economic performance of these entities. The Markel CATCo Funds issued multiple classes of nonvoting, redeemable preference shares to investors, and the Markel CATCo Funds are primarily invested in nonvoting preference shares of Markel CATCo Re. The underwriting results of Markel CATCo Re are attributed to investors through its nonvoting preference shares. Both Markel CATCo Re and the Markel CATCo Funds were placed into run-off in July 2019.

In March 2022, the Company completed a buy-out transaction with Markel CATCo Re and the Markel CATCo Funds that provided for an accelerated return of all remaining capital to investors in the Markel CATCo Funds. Under the terms of the transaction, the Company provided cash funding of $45.1 million to purchase substantially all of the Markel CATCo Funds' interests in Markel CATCo Re. See note 21 for further details regarding the terms of the buy-out transaction. As part of the transaction, substantially all of the preference shares held by investors in the Markel CATCo Funds were redeemed, including preference shares previously held by the Company. See note 5 for details regarding the Company's investment in the Markel CATCo Funds.

During June 2022, the Company received a return of $24.9 million of the capital it provided in March 2022 and the related preference shares were redeemed. As of December 31, 2022, the Company's investment in the remaining preference shares of Markel CATCo Re totaled $20.1 million, which comprised 23% of the equity of Markel CATCo Re. Through that investment, the Company has exposure to adverse loss development on reinsurance contracts previously written by Markel CATCo Re for loss events that occurred from 2014 to 2020. If loss reserves held by Markel CATCo Re are sufficient to settle claims on the remaining open contracts, the Company will receive a full return of the remaining $20.1 million in capital. Favorable development on loss reserves held by Markel CATCo Re, less operating expenses, will be distributed to the Markel CATCo Funds, and ultimately to investors in the Markel CATCo Funds.

Markel CATCo Re is considered a VIE, as the equity at risk does not have the right to receive residual returns that exceed the capital provided by the Company in the buy-out transaction. As a result of the preference shares acquired by the Company in the buy-out transaction, and the voting shares held by its consolidated subsidiary, MCIM, the Company consolidates Markel CATCo Re as its primary beneficiary. Results attributed to the run-off of Markel CATCo Re are reported with the Company's other ILS operations, within services and other revenues and expenses, and are not included in a reportable segment. For the

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year ended December 31, 2022, there was $89.9 million of favorable loss reserve development on the run-off of reinsurance contracts written by Markel CATCo Re, all of which was included in services and other expenses and attributable to noncontrolling interests.

The Company's consolidated balance sheet includes the following amounts attributable to Markel CATCo Re.

(dollars in thousands)	December 31, 2022
Assets
Cash and cash equivalents	$	104,443
Restricted cash and cash equivalents	317,577
Other assets and receivables due from cedents	41,357
Total Assets	$	463,377
Liabilities and Equity
Unpaid losses and loss adjustment expenses	$	347,921
Other liabilities	26,717
Total Liabilities	374,638
Shareholders' equity	21,139
Noncontrolling interests	67,600
Total Equity	88,739
Total Liabilities and Equity	$	463,377

In connection with the buy-out transaction, the Company also entered into a tail risk cover with Markel CATCo Re. Through this contract, the Company has $142.7 million of uncollateralized exposure to adverse development on loss reserves held by Markel CATCo Re for loss exposures in excess of limits that the Company believes are unlikely to be exceeded.

18. Related Party Transactions

The Company engages in certain related party transactions in the normal course of business at arm's length.

Insurance-Linked Securities

Within the Company's insurance-linked securities operations, the Company provides investment and insurance management services through Nephila Holdings Ltd. (together with its subsidiaries, Nephila). Nephila serves as the investment manager to several Bermuda based private funds (the Nephila Funds). To provide access for the Nephila Funds to a variety of insurance-linked securities in the property catastrophe, climate and specialty markets, Nephila also acts as an insurance manager to certain Bermuda Class 3 and 3A reinsurance companies, Lloyd's Syndicate 2357 and Lloyd's Syndicate 2358 (collectively, the Nephila Reinsurers). Nephila receives management fees for investment and insurance management services provided through its insurance-linked securities operations primarily based on the net asset value of the accounts managed, and, for certain funds, incentive fees based on their annual performance. Prior to the disposition of Velocity in February 2022, Nephila also provided managing general agent services to the Nephila Reinsurers in exchange for commissions. For the years ended December 31, 2022, 2021 and 2020, total revenues attributed to unconsolidated entities managed by Nephila were $79.5 million, $141.9 million and $152.0 million, respectively.

Through the Company's program services and other fronting operations, as well as its underwriting operations, the Company has programs with Nephila through which the Company writes insurance policies that are either partially or fully ceded to Nephila Reinsurers. Through the Company's program services and other fronting platforms, Nephila utilizes certain of the Company's licensed insurance companies to write U.S. catastrophe exposed property risk that is then ceded to Nephila Reinsurers. For the years ended December 31, 2022, 2021 and 2020, gross premiums written through the Company's program services and other fronting platforms on behalf of Nephila were $1.0 billion, $689.2 million and $412.4 million, respectively, all of which were ceded to Nephila Reinsurers. Through the Company's insurance underwriting operations, the Company has a quota share agreement with Nephila through which it cedes a portion of its property business to Nephila Reinsurers. For the years ended December 31, 2022, 2021 and 2020, the Company's underwriting operations ceded premiums of $65.6 million, $55.0 million and $47.6 million, respectively, to Nephila Reinsurers as part of its quota share agreement.

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As of December 31, 2022 and 2021, reinsurance recoverables on the consolidated balance sheets included $1.4 billion and $807.0 million, respectively, due from Nephila Reinsurers. Under its programs with Nephila Reinsurers, the Company bears underwriting risk for annual aggregate agreement year losses in excess of a limit the Company believes is unlikely to be exceeded. To the extent losses under these programs exceed the prescribed limits, the Company is obligated to pay such losses to the cedents without recourse to the Nephila Reinsurers. While the Company believes losses under these programs are unlikely, those losses, if incurred, could be material to the Company's consolidated results of operations and financial condition.

The Company has also entered into other assumed and ceded reinsurance transactions with the Nephila Reinsurers in the normal course of business, which are not material to the Company's consolidated financial statements.

Hagerty

The Company holds a minority ownership interest in Hagerty, which operates primarily as a managing general agent and also includes Hagerty Reinsurance Limited (Hagerty Re), a Bermuda Class 3 reinsurance company. Through the Company's underwriting operations, the Company underwrites insurance for Hagerty, and a portion of this insurance is ceded to Hagerty Re. For the years ended December 31, 2022, 2021 and 2020, the Company's gross written premiums attributable to Hagerty were $689.7 million, $596.9 million and $506.7 million, respectively, of which $456.6 million, $338.9 million and $239.3 million, respectively, were ceded to Hagerty Re. As of December 31, 2022 and 2021, reinsurance recoverables on the consolidated balance sheets included $159.7 million and $95.6 million, respectively, due from Hagerty Re.

19. Shareholders' Equity

a) The Company has 50,000,000 shares of no par value common stock authorized. The following table presents a rollforward of changes in common shares issued and outstanding.

	Years Ended December 31,
(in thousands)	2022	2021
Issued and outstanding common shares, beginning of year	13,632	13,783
Issuance of common shares	24	18
Repurchase of common shares	(233)	(169)
Issued and outstanding common shares, end of year	13,423	13,632

b) The Company also has 10,000,000 shares of no par value preferred stock authorized, of which 600,000 shares were issued and outstanding at December 31, 2022 and 2021. The Company has the option to redeem the preferred shares:

•in whole but not in part, at any time, within 90 days after the occurrence of a "rating agency event," at $1,020 per preferred share, plus accrued and unpaid dividends,

•in whole but not in part, at any time, within 90 days after the occurrence of a "regulatory capital event" at $1,000 per preferred share, plus accrued and unpaid dividends, or

•in whole or in part, on June 1, 2025, or every fifth anniversary of that date, at $1,000 per preferred share, plus accrued and unpaid dividends.

A "rating agency event" means that any nationally recognized statistical rating organization that publishes a rating for the Company amends, clarifies or changes the criteria it uses to assign equity credit to securities like the preferred shares, which results in shortening the length of time that the preferred shares are assigned a particular level of equity credit or in the lowering of the equity credit assigned to the preferred shares.

A "regulatory capital event" means that the Company becomes subject to capital adequacy supervision by a capital regulator and determines that, under such capital adequacy guidelines, the liquidation preference amount of the preferred shares would not qualify as capital.

The preferred shares rank senior to the Company's common stock with respect to the payment of dividends and liquidation rights. Holders of the preferred shares are entitled to receive non-cumulative cash dividends, when, as and if declared by the Board of Directors, from the original issue date, semi-annually in arrears on the first day of June and December of each year. The Company accrues dividends when they are declared by the Board of Directors. To the extent declared, these dividends will accrue, on the liquidation preference of $1,000 per share, at a fixed annual rate of 6.00% from the original issue date to

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June 1, 2025. After June 1, 2025, the dividend rate will reset every five years and accrue at an annual rate equal to the five-year U.S. Treasury Rate as of two business days prior to the reset date, plus 5.662%. Dividends will not be cumulative and will not be mandatory. Accordingly, if dividends are not declared for any dividend period, then dividends for that dividend period will not accrue and will not be payable.

For both years ended December 31, 2022 and 2021, the Company declared and paid dividends on preferred shares of $36.0 million, or $60.00 per share.

c) The following table presents net income (loss) per common share and diluted net income (loss) per common share.

	Years Ended December 31,
(in thousands, except per share amounts)	2022		2021		2020
Net income (loss) to common shareholders	$	(250,123)	$	2,389,003	$	797,630
Adjustment of redeemable noncontrolling interests	(69,896)		46,874		(28,705)
Adjusted net income (loss) to common shareholders	$	(320,019)	$	2,435,877	$	768,925
Basic common shares outstanding	13,580		13,768		13,811
Dilutive potential common shares from restricted stock units and restricted stock (1) (2)	—		32		12
Diluted common shares outstanding	13,580		13,800		13,823
Basic net income (loss) per common share	$	(23.57)	$	176.92	$	55.67
Diluted net income (loss) per common share (1) (2)	$	(23.57)	$	176.51	$	55.63

(1)    The Company has issued grants and awards of restricted stock units to employees as performance, retention or hiring incentives, as well as awards of restricted stock to non-employee directors, under its equity incentive compensation plan. At December 31, 2022, there were 116,431 shares available for future awards under the Company's equity incentive compensation plan.

(2)    The impact of 33 thousand shares from restricted stock units and restricted stock was excluded from the computation of diluted net loss per common share for the year ended December 31, 2022 because the effect would have been anti-dilutive.

20. Other Comprehensive Income

Other comprehensive income includes changes in net unrealized gains (losses) on available-for-sale investments, which is comprised of net holding gains (losses) arising during the period, changes in unrealized other-than-temporary impairment losses, if any, and reclassification adjustments for net realized gains included in net income. Other comprehensive income also includes changes in foreign currency translation adjustments and changes in net actuarial pension loss. The following table presents the change in accumulated other comprehensive income (loss) by component, net of noncontrolling interests.

(dollars in thousands)	Unrealized Gains (Losses) on Available-for-Sale Investments		Foreign Currency		Net Actuarial Pension Loss		Accumulated other comprehensive income (loss)
December 31, 2019	$	346,037	$	(86,249)	$	(51,016)	$	208,772
Total other comprehensive income (loss) before income taxes	442,089		29,829		(8,849)		463,069
Income tax (expense) benefit	(89,316)		—		1,851		(87,465)
Total other comprehensive income (loss)	352,773		29,829		(6,998)		375,604
December 31, 2020	$	698,810	$	(56,420)	$	(58,014)	$	584,376
Total other comprehensive income (loss) before income taxes	(450,096)		(2,091)		10,663		(441,524)
Income tax (expense) benefit	95,158		1,880		(2,273)		94,765
Total other comprehensive income (loss)	(354,938)		(211)		8,390		(346,759)
December 31, 2021	$	343,872	$	(56,631)	$	(49,624)	$	237,617
Total other comprehensive income (loss) before income taxes	(1,407,316)		(9,677)		31,222		(1,385,771)
Income tax (expense) benefit	297,168		401		(6,492)		291,077
Total other comprehensive income (loss)	(1,110,148)		(9,276)		24,730		(1,094,694)
December 31, 2022	$	(766,276)	$	(65,907)	$	(24,894)	$	(857,077)

10K - 120

21. Commitments and Contingencies

a) In March 2022, the Company completed a buy-out transaction with Markel CATCo Re and the Markel CATCo Funds, which are currently in run-off, that provided for an accelerated return of all remaining capital to investors in the Markel CATCo Funds. Under the terms of the transaction, the Company provided cash funding of $45.1 million to purchase substantially all of the Markel CATCo Funds' investments in Markel CATCo Re and also provided tail risk cover of $142.7 million to Markel CATCo Re to allow for the release of collateral to investors. In order to complete the transaction, the Company also made $101.9 million in additional payments, net of insurance proceeds, to or for the benefit of investors, which were recognized as an expense to the Company and included in services and other expenses for the year ended December 31, 2022. In conjunction with the buy-out transaction, all investors holding securities in the Markel CATCo Funds, the Markel CATCo Group Companies (MCIM, the Markel CATCo Funds and Markel CATCo Re), Markel Corporation and each of their related parties, among others, granted mutual releases of all claims related to the transaction, the Markel CATCo Group Companies' businesses and the investors' investments in the Funds, including any pending litigation. See note 17 for further details about the Company's Markel CATCo operations and the buy-out transaction.

b) Contingencies arise in the normal course of the Company's operations and are not expected to have a material impact on the Company's financial condition or results of operations.

22. Statutory Financial Information

a) The following table summarizes statutory capital and surplus for the Company's insurance subsidiaries.

	December 31,
(dollars in thousands)	2022		2021
United States	$	5,236,793	$	4,493,310
United Kingdom	$	749,495	$	736,575
Bermuda	$	1,895,132	$	2,106,606
Germany	$	125,194	$	95,693

As of December 31, 2022, the Company's actual statutory capital and surplus significantly exceeded the regulatory requirements. As a result, the amount of statutory capital and surplus necessary to satisfy regulatory requirements is not significant in relation to actual statutory capital and surplus.

The following table summarizes statutory net income (loss) for the Company's insurance subsidiaries.

	Years Ended December 31,
(dollars in thousands)	2022		2021		2020
United States	$	689,341	$	705,908	$	616,135
United Kingdom	$	35,719	$	56,546	$	(25,776)
Bermuda	$	(144,239)	$	556,275	$	228,740
Germany	$	(2,471)	$	1,780	$	(4,628)

Amounts presented for the Company's U.S. insurance subsidiaries have been calculated in accordance with prescribed statutory accounting rules. For the Company's international insurance subsidiaries, the regulations that govern the calculation of statutory capital and surplus do not provide requirements for the calculation of net income. Rather, such amounts are reported in accordance with a basis of accounting permitted by their respective regulator. Amounts presented for the Company's U.K., Bermuda and German insurance subsidiaries have been calculated in accordance with U.K. GAAP, U.S. GAAP and German GAAP, respectively.

United States

The laws of the domicile states of the Company's U.S. insurance subsidiaries govern the amount of dividends that may be paid to the Company. Generally, statutes in the domicile states of the Company's U.S. insurance subsidiaries require prior approval for payment of extraordinary, as opposed to ordinary, dividends. As of December 31, 2022, the Company's U.S. insurance

10K - 121

subsidiaries could pay up to $655.6 million to the holding company during the following 12 months under the ordinary dividend regulations.

In converting from U.S. statutory accounting principles to U.S. GAAP, typical adjustments include deferral of policy acquisition costs, differences in the calculation of deferred income taxes and the inclusion of net unrealized gains or losses relating to fixed maturity securities in shareholders' equity. The Company does not use any permitted statutory accounting practices that are different from prescribed statutory accounting practices which impact statutory capital and surplus.

United Kingdom

The Company's U.K. insurance subsidiary, Markel International Insurance Company Limited (MIICL), and its Lloyd's managing agent, Markel Syndicate Management Limited (MSM), are authorized by the Prudential Regulation Authority (PRA) and regulated by both the PRA and the Financial Conduct Authority (FCA). The PRA oversees compliance with established periodic auditing and reporting requirements, minimum solvency margins and individual capital assessment requirements under the Solvency II Directive (Solvency II) and imposes dividend restrictions, while both the PRA and the FCA oversee compliance with risk assessment reviews and various other requirements. MIICL is required to give advance notice to the PRA for any transaction or proposed transaction with a connected or related person. MSM is required to satisfy the solvency requirements of Lloyd's. In addition, the Company's U.K. subsidiaries must comply with the United Kingdom Companies Act of 2006, which provides that dividends may only be paid out of profits available for that purpose. Earnings of the Company's U.K. insurance subsidiaries are available for distribution to the holding company to the extent not otherwise restricted.

Bermuda

The Company's Bermuda insurance subsidiary, Markel Bermuda Limited (MBL), is subject to enhanced capital requirements in addition to minimum solvency and liquidity requirements. The enhanced capital requirement is determined by reference to a risk-based capital model that determines a control threshold for statutory capital and surplus by taking into account the risk characteristics of different aspects of the insurer's business. At December 31, 2022, MBL satisfied both the enhanced capital requirements and the minimum solvency and liquidity requirements.

Under the Bermuda Insurance Act, MBL is prohibited from paying or declaring dividends during a fiscal year if it is in breach of its enhanced capital requirement, solvency margin or minimum liquidity ratio or if the declaration or payment of the dividend would cause a breach of those requirements. If an insurer fails to meet its solvency margin or minimum liquidity ratio on the last day of any financial year, it is prohibited from declaring or paying any dividends during the next financial year without the approval of the Bermuda Monetary Authority (BMA). Further, MBL is prohibited from declaring or paying, in any financial year, dividends of more than 25% of its total statutory capital and surplus as set forth in its previous year's statutory balance sheet unless at least seven days before payment of those dividends it files with the BMA an affidavit stating that it will continue to meet its solvency margin and minimum liquidity ratio. MBL must obtain the BMA's prior approval for a reduction by 15% or more of the total statutory capital as set forth in its previous year's financial statements. In addition, as a long-term insurer, MBL may not declare or pay a dividend to any person other than a policyholder unless the value of the assets in its long-term business fund, as certified by MBL's approved actuary, exceeds the liabilities of its long-term business. The amount of the dividend cannot exceed the aggregate of that excess and any other funds legally available for the payment of the dividend. As of December 31, 2022, MBL could pay up to $473.8 million to the holding company during the following 12 months without making any additional filings with the BMA.

Germany

The Company's German insurance subsidiary, Markel Insurance SE, is regulated by the Federal Financial Conduct Authority in Germany and is also subject to capital and solvency requirements under Solvency II.

b) Lloyd's sets the corporate members' required capital annually based on each syndicates' business plans, rating environment, reserving environment and input arising from Lloyd's discussions with, among others, regulatory and rating agencies. Such required capital is referred to as Funds at Lloyd's (FAL) and comprises cash and investments. The amount of cash and investments held as FAL as of December 31, 2022 was $873.0 million. Of this amount, $335.4 million was provided by the holding company and is not available for general use by the Company. The remaining amount, provided by the Company's insurance subsidiaries, is not available for distribution to the holding company. The Company's corporate member may also be required to maintain funds under the control of Lloyd's in excess of its capital requirements and such funds also may not be available for distribution to the holding company.

10K - 122

23. Markel Corporation (Parent Company Only) Financial Information

The following parent company only condensed financial information reflects the financial position, results of operations and cash flows of Markel Corporation.

CONDENSED BALANCE SHEETS

	December 31,
	2022		2021
	(dollars in thousands)
ASSETS
Investments, at estimated fair value:
Fixed maturity securities, available-for-sale (amortized cost of $164,100 in 2022 and $210,111 in 2021)	$	154,039	$	228,705
Equity securities (cost of $1,107,796 in 2022 and $1,771,597 in 2021)	1,473,116		2,784,189
Short-term investments, available-for-sale (estimated fair value approximates cost)	1,436,387		1,474,997
Total Investments	3,063,542		4,487,891
Cash and cash equivalents	594,101		763,985
Restricted cash and cash equivalents	21,146		15,485
Receivables	13,070		18,770
Investments in consolidated subsidiaries	12,905,353		13,298,971
Notes receivable from subsidiaries	60,111		135,756
Income taxes receivable	—		48,344
Other assets	445,875		408,161
Total Assets	$	17,103,198	$	19,177,363
LIABILITIES AND SHAREHOLDERS' EQUITY
Senior long-term debt	$	3,686,892	$	4,034,223
Notes payable to subsidiaries	—		32,753
Income taxes payable	120,616		—
Net deferred tax liability	148,365		295,289
Other liabilities	81,791		97,748
Total Liabilities	4,037,664		4,460,013
Shareholders' equity:
Preferred stock	591,891		591,891
Common stock	3,493,893		3,441,079
Retained earnings	9,836,827		10,446,763
Accumulated other comprehensive income (loss)	(857,077)		237,617
Total Shareholders' Equity	13,065,534		14,717,350
Total Liabilities and Shareholders' Equity	$	17,103,198	$	19,177,363

10K - 123

CONDENSED STATEMENTS OF INCOME (LOSS) AND COMPREHENSIVE INCOME (LOSS)

	Years Ended December 31,
	2022		2021		2020
	(dollars in thousands)
REVENUES
Net investment income	$	34,781	$	9,099	$	22,037
Dividends on common stock of consolidated subsidiaries	278,557		1,081,988		466,244
Net investment gains (losses):
Net realized investment gains	7,620		23,652		27,774
Change in fair value of equity securities	(397,906)		514,727		82,389
Net investment gains (losses)	(390,286)		538,379		110,163
Gain on sale of subsidiary	107,293		—		—
Other revenues (losses)	(29,487)		11,078		(4,011)
Total Revenues	858		1,640,544		594,433
EXPENSES
Services and other expenses	111,848		22,379		1,025
Interest expense	172,125		185,568		187,562
Net foreign exchange losses (gains)	(13,143)		(6,236)		6,823
Total Expenses	270,830		201,711		195,410
Income (Loss) Before Equity in Undistributed Earnings (Losses) of Consolidated Subsidiaries and Income Taxes	(269,972)		1,438,833		399,023
Equity in undistributed earnings (losses) of consolidated subsidiaries	(69,971)		1,081,976		400,289
Income tax (expense) benefit	125,820		(95,806)		16,718
Net Income (Loss) to Shareholders	(214,123)		2,425,003		816,030
Preferred stock dividends	(36,000)		(36,000)		(18,400)
Net Income (Loss) to Common Shareholders	$	(250,123)	$	2,389,003	$	797,630
OTHER COMPREHENSIVE INCOME (LOSS) TO SHAREHOLDERS
Change in net unrealized gains (losses) on available-for-sale investments, net of taxes:
Net holding gains (losses) arising during the period	$	(24,465)	$	(5,885)	$	21,482
Consolidated subsidiaries' net holding gains (losses) arising during the period	(1,130,589)		(342,430)		334,677
Reclassification adjustments for net gains (losses) included in net income (loss) to shareholders	1,965		(34)		(14,937)
Consolidated subsidiaries' reclassification adjustments for net gains (losses) included in net income (loss) to shareholders	42,941		(6,589)		11,551
Change in net unrealized gains (losses) on available-for-sale investments, net of taxes	(1,110,148)		(354,938)		352,773
Consolidated subsidiaries' change in foreign currency translation adjustments, net of taxes	(9,276)		(211)		29,829
Consolidated subsidiaries' change in net actuarial pension loss, net of taxes	24,730		8,390		(6,998)
Total Other Comprehensive Income (Loss) to Shareholders	(1,094,694)		(346,759)		375,604
Comprehensive Income (Loss) to Shareholders	$	(1,308,817)	$	2,078,244	$	1,191,634

10K - 124

CONDENSED STATEMENTS OF CASH FLOWS

	Years Ended December 31,
	2022		2021		2020
	(dollars in thousands)
OPERATING ACTIVITIES
Net income (loss) to shareholders	$	(214,123)	$	2,425,003	$	816,030
Adjustments to reconcile net income (loss) to shareholders to net cash provided by operating activities	487,259		(2,213,261)		(708,162)
Net Cash Provided By Operating Activities	273,136		211,742		107,868
INVESTING ACTIVITIES
Proceeds from sales, maturities, calls and prepayments of fixed maturity securities	13,047		37,607		319,502
Proceeds from sales of equity securities	65,379		105,700		276,637
Cost of equity securities purchased	(16,660)		(73,644)		(90,459)
Net change in short-term investments	58,970		(224,646)		(522,666)
Return of capital from subsidiaries	—		17,193		15,164
Decrease (increase) in notes receivable due from subsidiaries	75,645		(50,000)		(25,000)
Capital contributions to subsidiaries (1)	(94,585)		(271,729)		(605,426)
Proceeds from sale of subsidiary	165,615		—		—
Cost of equity method investments	—		(38,550)		(4,917)
Other	4,779		(5,368)		17,984
Net Cash Provided (Used) By Investing Activities	272,190		(503,437)		(619,181)
FINANCING ACTIVITIES
Repayment of senior long-term debt	(350,000)		—		—
Additions to senior long-term debt	—		591,354		—
Decrease in notes payable to subsidiaries	(32,753)		—		(50,000)
Repurchases of common stock	(290,796)		(206,518)		(26,832)
Issuance of preferred stock, net	—		—		591,891
Dividends paid on preferred stock	(36,000)		(36,000)		(18,400)
Other	—		(1,181)		15
Net Cash Provided (Used) By Financing Activities	(709,549)		347,655		496,674
Increase (decrease) in cash, cash equivalents, restricted cash and restricted cash equivalents	(164,223)		55,960		(14,639)
Cash, cash equivalents, restricted cash and restricted cash equivalents at beginning of year	779,470		723,510		738,149
CASH, CASH EQUIVALENTS, RESTRICTED CASH AND RESTRICTED CASH EQUIVALENTS AT END OF YEAR	$	615,247	$	779,470	$	723,510

(1)    The holding company made non-cash capital contributions in the form of investments to its subsidiaries totaling $924.0 million and $49.5 million for the years ended December 31, 2022 and 2020, respectively. There were no non-cash capital contributions made to subsidiaries for the year ended December 31, 2021.

10K - 125

24. Immaterial Correction to Prior Period Financial Statements for Accounting Policy Change

The Company defers and amortizes costs directly related to the successful acquisition of new or renewal insurance contracts over the related policy period, generally one year. Previously, the Company did not defer salaries and benefits associated with the successful acquisition of insurance contracts, as such amounts were quantified and assessed each period and were deemed not to be material to the consolidated financial statements. Effective January 1, 2022, the Company changed its accounting policy to defer salaries and benefits associated with the successful acquisition of insurance contracts in accordance with the requirements of FASB ASC 944, Financial Services–Insurance.

To reflect the change in accounting policy, the Company made a cumulative adjustment to increase deferred policy acquisition costs by $28.2 million, increase deferred tax liabilities by $5.9 million and increase retained earnings by $22.3 million as of January 1, 2020, which is the beginning of the earliest year presented in the consolidated financial statements included herein. These increases in deferred policy acquisition costs, deferred tax liabilities and retained earnings are reflected as increases to the previously reported amounts in the Company's consolidated balance sheet as of December 31, 2021 and as an adjustment to retained earnings as of January 1, 2020 in the accompanying consolidated statement of changes in equity for the year ended December 31, 2020. The Company considered both the quantitative and qualitative factors within the provisions of U.S. Securities and Exchange Commission Staff Accounting Bulletin (SAB) No. 99, Materiality, and SAB No. 108, Considering the Effect of Prior Year Misstatements when Quantifying Misstatements in Current Year Financial Statements and determined that the impact of the change in accounting policy was not material to the Company's previously issued consolidated financial statements. The Company did not adjust the amounts previously presented in the consolidated statements of income and comprehensive income for the years ended December 31, 2020 and 2021 for the change in accounting policy as the effects were not material. The cumulative income statement effect for those periods was included in the consolidated statement of loss and comprehensive loss for the year ended December 31, 2022.

10K - 126

Item 9A. CONTROLS AND PROCEDURES

Evaluation of Disclosure Controls and Procedures

As of December 31, 2022, we evaluated the effectiveness of the design and operation of our disclosure controls and procedures (Disclosure Controls), as defined under Rules 13a-15(e) and 15d-15(e) of the Securities Exchange Act of 1934 (Exchange Act). This evaluation was conducted under the supervision and with the participation of our management, including the Principal Executive Officer (PEO) and the Principal Financial Officer (PFO).

Based upon this evaluation, the PEO and PFO concluded that effective Disclosure Controls were in place to ensure that the information required to be disclosed in reports we file or submit under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in the Securities and Exchange Commission's rules and forms.

Management's Report On Internal Control Over Financial Reporting

Management is responsible for establishing and maintaining adequate internal control over financial reporting, as defined in Rules 13a-15(f) and 15d-15(f) of the Exchange Act. Our internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles.

Management does not expect that its internal control over financial reporting will prevent all error and all fraud. A control system, no matter how well conceived and operated, can provide only reasonable, not absolute, assurance that the objectives of the control system are met. Internal control over financial reporting is a process that involves human diligence and compliance and is subject to lapses in judgment and breakdowns resulting from human failures. Because of the inherent limitations in all control systems, no evaluation of controls can provide absolute assurance that all control issues and instances of fraud, if any, have been detected. The design of any system of internal control over financial reporting also is based in part upon certain assumptions about the likelihood of future events, and there can be no assurance that any design will succeed in achieving its stated goals under all potential future conditions.

Under the supervision and with the participation of management, including the PEO and the PFO, we evaluated the effectiveness of our internal control over financial reporting as of December 31, 2022, based on criteria established in Internal Control - Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission. Based on our evaluation, we have concluded that we maintained effective internal control over financial reporting as of December 31, 2022.

KPMG LLP, our independent registered public accounting firm, has issued an attestation report on the effectiveness of our internal control over financial reporting as of December 31, 2022, which is included herein.

Changes in Internal Control Over Financial Reporting

There were no changes in our internal control over financial reporting during the fourth quarter of 2022 that materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

10K - 127

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Shareholders and Board of Directors

Markel Corporation:

Opinion on Internal Control Over Financial Reporting

We have audited Markel Corporation and subsidiaries' (the Company) internal control over financial reporting as of December 31, 2022, based on criteria established in Internal Control – Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission. In our opinion, the Company maintained, in all material respects, effective internal control over financial reporting as of December 31, 2022, based on criteria established in Internal Control – Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the consolidated balance sheets of the Company as of December 31, 2022 and 2021, the related consolidated statements of income (loss) and comprehensive income (loss), changes in equity, and cash flows for each of the years in the three-year period ended December 31, 2022, and the related notes (collectively, the consolidated financial statements), and our report dated February 17, 2023 expressed an unqualified opinion on those consolidated financial statements.

Basis for Opinion

The Company's management is responsible for maintaining effective internal control over financial reporting and for its assessment of the effectiveness of internal control over financial reporting, included in the accompanying Management's Report on Internal Control over Financial Reporting. Our responsibility is to express an opinion on the Company's internal control over financial reporting based on our audit. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audit in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether effective internal control over financial reporting was maintained in all material respects. Our audit of internal control over financial reporting included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, and testing and evaluating the design and operating effectiveness of internal control based on the assessed risk. Our audit also included performing such other procedures as we considered necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinion.

Definition and Limitations of Internal Control Over Financial Reporting

A company's internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company's internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company's assets that could have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

/s/ KPMG LLP

Richmond, Virginia

February 17, 2023

10K - 128

PART III

Except for the information set forth under "Information About Our Executive Officers" in Part I, the information required by Part III (Items 10, 11 (excluding information required pursuant to Item 402(v) of Regulation S-K), 12, 13 and 14) will be incorporated by reference from the Company's Proxy Statement for its 2023 Annual Meeting of Shareholders pursuant to instructions G(1) and G(3) of the General Instructions to Form 10-K.

Our independent registered public accounting firm is KPMG LLP, Richmond, VA, Auditor Firm ID: 185.

PART IV

Item 15. EXHIBIT AND FINANCIAL STATEMENT SCHEDULES

(a) 1. Financial Statements

The following consolidated financial statements, as well as the Report of Independent Registered Public Accounting Firm, are included in Item 8.

	Page Number
Report of Independent Registered Public Accounting Firm	10K - 71
Consolidated Balance Sheets—December 31, 2022 and 2021	10K - 73
Consolidated Statements of Income (Loss) and Comprehensive Income (Loss)—Years Ended December 31, 2022, 2021 and 2020	10K - 74
Consolidated Statements of Changes in Equity—Years Ended December 31, 2022, 2021 and 2020	10K - 75
Consolidated Statements of Cash Flows—Years Ended December 31, 2022, 2021 and 2020	10K - 76
Notes to Consolidated Financial Statements	10K - 77

Other schedules are omitted because they are not required, information therein is not applicable, or is reflected in the consolidated financial statements or notes to consolidated financial statements.

(b) Exhibits

See Exhibit Index.

10K - 129

EXHIBIT INDEX

Exhibit No.	Document Description
3.1(a)	Amended and Restated Articles of Incorporation (incorporated by reference from Exhibit 3.1 in the Registrant's report on Form 8-K filed with the Commission May 13, 2011)
3.1(b)	Articles of Amendment to the Amended and Restated Articles of Incorporation (incorporated by reference from Exhibit 3.1 in the Registrant's report on Form 8-K filed with the Commission May 27, 2020)
3.2	Bylaws, as amended and restated January 1, 2023**
4.1	Description of Registrant's Securities**
4.2(a)	Indenture dated as of June 5, 2001 between Markel Corporation and The Chase Manhattan Bank, as Trustee (incorporated by reference from Exhibit 4.1 in the Registrant's report on Form 8-K filed with the Commission June 5, 2001)
4.2(b)	Form of Third Supplemental Indenture dated as of August 13, 2004 between Markel Corporation and JPMorgan Chase Bank (formerly known as The Chase Manhattan Bank), as Trustee, including form of the securities as Exhibit A (incorporated by reference from Exhibit 4.2 in the Registrant's report on Form 8-K filed with the Commission August 11, 2004)
4.2(c)	Form of Eighth Supplemental Indenture dated as of March 8, 2013 between Markel Corporation and The Bank of New York Mellon (as successor to The Chase Manhattan Bank), as Trustee, including form of the securities as Exhibit A (incorporated by reference from Exhibit 4.2 in the Registrant's report on Form 8-K filed with the Commission March 7, 2013)
4.2(d)	Form of Ninth Supplemental Indenture dated as of March 8, 2013 between Markel Corporation and The Bank of New York Mellon (as successor to The Chase Manhattan Bank), as Trustee, including form of the securities as Exhibit A (incorporated by reference from Exhibit 4.3 in the Registrant's report on Form 8-K filed with the Commission March 7, 2013)
4.2(e)	Form of Tenth Supplemental Indenture dated as of April 5, 2016 between Markel Corporation and The Bank of New York Mellon (as successor to The Chase Manhattan Bank), as Trustee, including form of the securities as Exhibit A (incorporated by reference from Exhibit 4.2 in the Registrant's report on Form 8-K filed with the Commission March 31, 2016)
4.2(f)	Eleventh Supplemental Indenture dated as of November 2, 2017 between Markel Corporation and The Bank of New York Mellon (as successor to The Chase Manhattan Bank), as Trustee, including form of the securities as Exhibit A (incorporated by reference from Exhibit 4.2 in the Registrant's report on Form 8-K filed with the Commission November 2, 2017)
4.2(g)	Twelfth Supplemental Indenture dated as of November 2, 2017 between Markel Corporation and The Bank of New York Mellon (as successor to The Chase Manhattan Bank), as Trustee, including form of the securities as Exhibit A (incorporated by reference from Exhibit 4.3 in the Registrant's report on Form 8-K filed with the Commission November 2, 2017)
4.2(h)	Thirteenth Supplemental Indenture, dated as of May 20, 2019, between Markel Corporation and The Bank of New York Mellon (as successor to The Chase Manhattan Bank), as Trustee, including form of the securities as Exhibit A (incorporated by reference from Exhibit 4.2 in the Registrant's report on Form 8-K filed with the Commission May 20, 2019)
4.2(i)	Fourteenth Supplemental Indenture, dated as of September 17, 2019, between Markel Corporation and The Bank of New York Mellon (as successor to The Chase Manhattan Bank), as Trustee, including form of the securities as Exhibit A (incorporated by reference from Exhibit 4.2 in the Registrant's report on Form 8-K filed with the Commission September 17, 2019)
4.2(j)	Fifteenth Supplemental Indenture, dated as of September 17, 2019, between Markel Corporation and The Bank of New York Mellon (as successor to The Chase Manhattan Bank), as Trustee, including form of the securities as Exhibit A (incorporated by reference from Exhibit 4.3 in the Registrant's report on Form 8-K filed with the Commission September 17, 2019)
4.2(k)	Sixteenth Supplemental Indenture, dated as of May 7, 2021, between Markel Corporation and The Bank of New York Mellon (as successor to The Chase Manhattan Bank), as Trustee, including form of the securities as Exhibit A (incorporated by reference from Exhibit 4.2 in the Registrant's report on Form 8-K filed with the Commission May 7, 2021)

10K - 130

The registrant hereby agrees to furnish to the Securities and Exchange Commission, upon request, a copy of all other instruments defining the rights of holders of long-term debt of the registrant and its subsidiaries.

Exhibit No.	Document Description
10.1(a)	Credit Agreement, dated as of April 10, 2019, among Markel Corporation, Markel Bermuda Limited, Markel Global Reinsurance Company, Alterra Finance LLC, the lenders party from time to time thereto, and Wells Fargo Bank, National Association, as administrative agent (incorporated by reference from Exhibit 10.1 in the Registrant's report on Form 8-K filed with the Commission April 12, 2019)
10.1(b)	First Amendment to Credit Agreement, dated as of December 13, 2019, among Markel Corporation, Markel Bermuda Limited, Markel Global Reinsurance Company, Alterra Finance LLC and Wells Fargo National Association (incorporated by reference from Exhibit 10.1(b) in the Registrant's Report on Form 10-K filed with the Commission for the year ended December 31, 2019)
10.2	Form of Amended and Restated Employment Agreement with Anthony F. Markel (incorporated by reference from Exhibit 10.4 in the Registrant's report on Form 10-K filed with the Commission for the year ended December 31, 2008)*
10.3(a)	Amended and Restated Employment Agreement with Steven A. Markel (incorporated by reference from Exhibit 10.1 in the Registrant's report on Form 10-Q filed with the Commission for the quarter ended September 30, 2015)*
10.3(b)	Amendment dated as of December 31, 2017 to Amended and Restated Employment Agreement with Steven A. Markel (incorporated by reference from Exhibit 10.6 in the Registrant's report on Form 10-K filed with the Commission for the year ended December 31, 2017)*
10.4(a)	Form of Amended and Restated Executive Employment Agreement with Thomas S. Gayner and Richard R. Whitt, III (incorporated by reference from Exhibit 10.4 in the Registrant's report on Form 10-K filed with the Commission for the year ended December 31, 2021)*
10.4(b)	Amendment to Executive Employment Agreement with Richard R. Whitt, III (incorporated by reference from Exhibit 10.1 in the Registrant's report on 10-Q filed with the Commission for the quarter ended September 30, 2022)*
10.5	Form of Amended and Restated Executive Employment Agreement with Andrew G. Crowley, Robert C. Cox, Michael R. Heaton, Jeremy A. Noble and Richard R. Grinnan (incorporated by reference from Exhibit 10.5 in the Registrant's report on Form 10-K filed with the Commission for the year ended December 31, 2021)*
10.6(a)	Markel Corporation Voluntary Deferral Plan (incorporated by reference from Exhibit 10.14 in the Registrant's report on Form 10-K filed with the Commission for the year ended December 31, 2015)*
10.6(b)	Amendment to Markel Corporation Voluntary Deferral Plan (incorporated by reference from Exhibit 10.20 in the Registrant's report on Form 10-K filed with the Commission for the year ended December 31, 2018)*
10.6(c)	Amendment to Markel Corporation Voluntary Deferral Plan (incorporated by reference from Exhibit 10.1 in the Registrant's report on Form 10-Q filed with the Commission for the quarter ended September 30, 2019)*
10.7(a)	Markel Corporation Omnibus Incentive Plan (incorporated by reference from Appendix B in the Registrant's Proxy Statement and Definitive 14A filed with the Commission April 2, 2003)*
10.7(b)	May 2010 Restricted Stock Units Deferral Election Form (incorporated by reference from Exhibit 10.2 in the Registrant's report on Form 10-Q filed with the Commission for the quarter ended June 30, 2010)*
10.8(a)	Markel Corporation 2012 Equity Incentive Compensation Plan (incorporated by reference from Appendix A in the Registrant's Proxy Statement and Definitive 14A filed with the Commission March 16, 2012)*
10.8(b)	Restricted Stock Units Deferral Election Form for the 2012 Equity Incentive Compensation Plan (incorporated by reference from Exhibit 10.24 in the Registrant's report on Form 10-K filed with the Commission for the year ended December 31, 2012)*
10.9	Markel Corporation Executive Bonus Plan, as amended and restated May 14, 2018 (incorporated by reference from Exhibit 10.1 in the Registrant's report on Form 10-Q filed with the Commission for the quarter ended June 30, 2018)*
10.10(a)	2016 Equity Incentive Compensation Plan (incorporated by reference from Exhibit 10.1 in the Registrant's report on Form 8-K filed with the Commission May 19, 2016)*
10.10(b)	Form of Performance-Based Restricted Stock Unit Award Agreement (adopted 2019) for Executive Officers for the 2016 Equity Incentive Compensation Plan (incorporated by reference from Exhibit 10.15(i) in the Registrant's report on Form 10-K filed with the Commission for the year ended December 31, 2019)*

10K - 131

10.10(c)	Form of Restricted Stock Award Agreement for Outside Directors for the 2016 Equity Incentive Compensation Plan (incorporated by reference from Exhibit 10.2 in the Registrant's report on Form 10-Q filed with the Commission for the quarter ended June 30, 2020)*
10.10(d)	Form of Performance-Based Restricted Stock Unit Award Agreement (adopted 2021) for Executive Officers for the 2016 Equity Incentive Compensation Plan (incorporated by reference from Exhibit 10.1(a) in the Registrant's report on Form 10-Q filed with the Commission for the quarter ended March 31, 2021)*
10.10(e)	Form of Time-Based Restricted Stock Unit Award Agreement (adopted 2021) for Executive Officers for the 2016 Equity Incentive Compensation Plan (incorporated by reference from Exhibit 10.1(b) in the Registrant's report on Form 10-Q filed with the Commission for the quarter ended March 31, 2021)*
10.10(f)	Form of Performance-Based Restricted Unit Award Agreement (adopted 2022) for Executive Officers for the 2016 Equity Incentive Compensation Plan* **
10.10(g)	Form of Time-Based Restricted Stock Unit Award Agreement (adopted 2022) for Executive Officers for the 2016 Equity Incentive Compensation Plan* **
10.10(h)	Restricted Stock Units Deferral Election Form**
10.11	Markel Corporation 2020 Employee Stock Purchase Plan (incorporated by reference from Exhibit 10.1 in the Registrant's report on Form 8-K filed with the Commission May 15, 2020)*
21	Certain Subsidiaries of Markel Corporation**
23	Consent of KPMG LLP**
31.1	Certification of Principal Executive Officer Pursuant to Rule 13a-14(a)/ 15d-14(a)**
31.2	Certification of Principal Financial Officer Pursuant to Rule 13a-14(a)/ 15d-14(a)**
32.1	Certification furnished Pursuant to 18 U.S.C. Section 1350**
101	The following consolidated financial statements from Markel Corporation's Annual Report on Form 10-K for the year ended December 31, 2022, filed on February 17, 2023, formatted in Inline XBRL: (i) Consolidated Balance Sheets, (ii) Consolidated Statements of Income (Loss) and Comprehensive Income (Loss), (iii) Consolidated Statements of Changes in Equity, (iv) Consolidated Statements of Cash Flows and (v) Notes to Consolidated Financial Statements.**
104	Cover Page Interactive Data File (embedded within the Inline XBRL document)

*    Indicates management contract or compensatory plan or arrangement

**    Filed with this report

10K - 132

SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

MARKEL CORPORATION
/s/ Thomas S. Gayner	/s/ Brian J. Costanzo
Thomas S. Gayner	Brian J. Costanzo
Chief Executive Officer	Senior Vice President, Finance, Chief Accounting Officer and Controller
(Principal Executive Officer)	(Principal Financial Officer)
February 17, 2023	February 17, 2023

Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated.

Signatures	Title	Date
/s/ Steven A. Markel	Chairman of the Board	February 17, 2023
Steven A. Markel
/s/ Thomas S. Gayner	Director, Chief Executive Officer	February 17, 2023
Thomas S. Gayner	(Principal Executive Officer)
/s/ Brian J. Costanzo	Senior Vice President, Finance, Chief Accounting Officer and Controller	February 17, 2023
Brian J. Costanzo	(Principal Financial Officer)
	(Principal Accounting Officer)
/s/ Mark M. Besca	Director	February 17, 2023
Mark M. Besca
/s/ K. Bruce Connell	Director	February 17, 2023
K. Bruce Connell
/s/ Greta J. Harris	Director	February 17, 2023
Greta J. Harris
/s/ Morgan E. Housel	Director	February 17, 2023
Morgan E. Housel
/s/ Diane Leopold	Director	February 17, 2023
Diane Leopold
/s/ Anthony F. Markel	Director	February 17, 2023
Anthony F. Markel
/s/ Harold L. Morrison, Jr.	Director	February 17, 2023
Harold L. Morrison, Jr.
/s/ Michael O'Reilly	Director	February 17, 2023
Michael O'Reilly
/s/ A. Lynne Puckett	Director	February 17, 2023
A. Lynne Puckett

10K - 133

EX-3.2

EXHIBIT 3.2

MARKEL CORPORATION

BYLAWS

(as amended and restated January 1, 2023)

ARTICLE I

MEETINGS OF SHAREHOLDERS

Section 1.    Place and Time of Meetings. Meetings of shareholders shall be held at such place, either within or without the Commonwealth of Virginia, or by means of remote communication, in each case as the Board of Directors may in its discretion determine, and at such time as may be provided in the notice of the meeting and approved by the Chair of the Board, the Chief Executive Officer or the Board of Directors.

Section 2.    Annual Meeting. The annual meeting of shareholders shall be held on the date designated by the Board of Directors and specified in the notice of the meeting.

Section 3.    Special Meetings. Special meetings of the shareholders may be called by the Chair of the Board, the Chief Executive Officer or the Board of Directors. Only business within the purpose or purposes described in the notice for a special meeting of shareholders may be conducted at the meeting.

Section 4.    Fixing Record Date. The Board of Directors may fix in advance a record date to make a determination of shareholders entitled to notice or to vote at any meeting of shareholders, to receive any dividend, or for any other purpose, such date to be not more than 70 days before the meeting or action requiring a determination of shareholders. If no such date is set with respect to any meeting of shareholders, the day before the effective date of the notice of the meeting shall be the record date for such determination of shareholders. When a determination of shareholders entitled to notice of or to vote at any meeting of shareholders (regardless of who may have called the meeting) has been made, such determination shall be effective for any adjournment of the meeting unless the Board of Directors fixes a new record date, which it shall do if the meeting is adjourned to a date more than 120 days after the date fixed for the original meeting.

Section 5.    Notice of Meetings. Written notice stating the place (or means of remote communication, if authorized by the Board of Directors), day and hour of the meeting and, in case of a special meeting, the purpose or purposes for which the meeting is called, shall be given by the Corporation not less than ten nor more than 60 days before the date of the meeting (except as a different time is specified by law) to each shareholder of record entitled to vote at such meeting. Notice may be given in any manner permitted by applicable law, including by electronic transmission. If mailed, such notice shall be deemed to be given when deposited in the United States mail with postage thereon prepaid, addressed to the shareholder at such shareholder’s address as it appears on the share transfer books of the Corporation. If an annual or special meeting is adjourned to a different date, time or place (or means of remote communication, if authorized by the Board of Directors), notice need not be given if the new date, time or place (or means of remote communication, if authorized by the Board of Directors) is announced at the meeting before adjournment; however, if a new record date for an adjourned meeting is fixed, notice of the adjourned meeting shall be given to persons who are shareholders as of the new record date unless a court provides otherwise. Notwithstanding the foregoing, no notice of a shareholders’ meeting need be given to a shareholder if (i) an annual report and proxy statements for two consecutive annual meetings of shareholders or (ii) all, and at least two, checks in payment of dividends or interest on securities during a 12-month period, have been sent by first-class United States mail, with postage thereon prepaid, addressed to the shareholder at such shareholder’s address as it appears on the share transfer books of the Corporation, and returned undeliverable. The obligation of the Corporation to give notice of shareholders’ meetings to any such shareholder shall be reinstated once the Corporation has received a new address for such shareholder for entry on its share transfer books.

Section 6.    Waiver of Notice; Attendance at Meeting. A shareholder may waive any notice required by law, the Articles of Incorporation or these Bylaws before or after the date and time of the meeting that is the subject of such notice. The waiver shall be in writing, be signed by the shareholder entitled to the notice, and be delivered to the Secretary of the Corporation for filing with the minutes or corporate records. A shareholder’s attendance at a meeting (i) waives objection to lack of notice or defective notice of the meeting, unless the shareholder at the beginning of the meeting objects to holding the meeting or transacting business at the meeting, and (ii) waives objection to consideration of a particular matter at the meeting

that is not within the purpose or purposes described in the meeting notice, unless the shareholder objects to considering the matter when it is presented.

Section 7.    Quorum and Voting Requirements. Shares entitled to vote as a separate voting group may take action on a matter at a meeting only if a quorum of those shares exists with respect to that matter. Unless otherwise required by law or the Articles of Incorporation, a majority of the votes entitled to be cast on a matter by a voting group constitutes a quorum of that voting group for action on that matter. Once a share is represented for any purpose at a meeting, it is deemed present for quorum purposes for the remainder of the meeting and for any adjournment of that meeting unless a new record date is set for that adjourned meeting. If a quorum exists, action on a matter, other than the election of directors, by a voting group is approved if the votes cast within the voting group favoring the action exceed the votes cast opposing the action, unless a greater number of affirmative votes is required by law, the Articles of Incorporation or the rules or regulations of any stock exchange applicable to the Corporation. An abstention or an election by a shareholder not to vote on the action because of the failure to receive voting instructions from the beneficial owner of the shares shall not be considered a vote cast. A meeting may be adjourned by the chairperson of the meeting or by the shareholders even if there is less than a quorum.

Unless required by law or determined by the chairperson of the meeting to be advisable, the vote on any question need not be by ballot. On a vote by ballot, each ballot shall be signed by the shareholder voting or by such shareholder’s proxy. If authorized by the Board of Directors, a shareholder may vote by a ballot submitted by electronic transmission by the shareholder or the shareholder’s proxy, provided that any such electronic transmission shall either set forth or be submitted with information from which it can be determined that the electronic transmission was authorized by the shareholder or the shareholder’s proxy.

Section 8.    Proxies. A shareholder may vote the shareholder’s shares in person or by proxy. A shareholder or the shareholder’s agent or attorney-in-fact may appoint a proxy to vote or otherwise act for such shareholder by signing an appointment form or by an electronic transmission meeting the requirements of the Virginia Stock Corporation Act. An appointment of a proxy is effective when received by the inspectors of election or the Secretary or other officer or agent authorized to tabulate votes and is valid for 11 months unless a longer period is expressly provided in the appointment form. An appointment of a proxy is revocable by the shareholder unless the appointment form or the electronic transmission states that it is irrevocable and the appointment is coupled with an interest.

The death or incapacity of the shareholder appointing a proxy does not affect the right of the Corporation to accept the proxy’s authority unless notice of the death or incapacity is received by the Secretary or other officer or agent authorized to tabulate votes before the proxy exercises the proxy’s authority under the appointment. An irrevocable appointment is revoked when the interest with which it is coupled is extinguished. Subject to any legal limitations on the right of the Corporation to accept the vote or other action of a proxy and to any express limitation on the proxy’s authority stated in the appointment form or electronic transmission, the Corporation is entitled to accept the proxy’s vote or other action as that of the shareholder making the appointment. Any fiduciary who is entitled to vote any shares may vote such shares by proxy.

Section 9.    Participation in Meetings. To the extent authorized by the Board of Directors, shareholders may participate in meetings by means of remote communication. Subject to the applicable provisions of the Virginia Stock Corporation Act, a shareholder participating in a meeting by means of remote communication, as authorized by the Board of Directors, is deemed to be present in person at the meeting.

Section 10.    Order of Business at Meetings of Shareholders.

(a)    Annual Meetings of Shareholders. At any annual meeting of shareholders, only such nominations of persons for election to the Board of Directors shall be made, and only such other business shall be conducted or considered, as shall have been properly brought before the meeting. For nominations to be properly made at an annual meeting, and proposals of other business to be properly brought before an annual meeting, nominations and proposals of other business must be (i) specified in the Corporation’s notice of meeting (or any supplement thereto) given by or at the direction of the Board of Directors, (ii) otherwise properly made at the annual meeting by or at the direction of the Board of Directors or (iii) otherwise properly requested to be brought before the annual meeting by a shareholder of the Corporation in accordance with these Bylaws. For nominations of persons for election to the Board of Directors or proposals of other business to be properly requested by a shareholder to be made at an annual meeting, a shareholder must (x) be a shareholder of record at the time the shareholder gives the notice of such nomination or proposal required by Article I, Section 11, at the time of giving of notice of such annual meeting by or at the direction of the Board of Directors and at the time of the annual meeting, (y) be entitled to vote at such annual meeting and (z) comply with the procedures set forth in these Bylaws as to such business or nomination. The immediately preceding sentence shall be the exclusive means for a shareholder to make nominations or other business proposals (other than (I) matters properly brought under Rule 14a-8 under the Securities Exchange Act of 1934, as amended (the

“Exchange Act”) and included in the Corporation’s notice of meeting and (II) nominations properly brought by an Eligible Shareholder pursuant to Article I, Section 12 and included in the Corporation’s proxy statement) before an annual meeting of shareholders.

(b)    Special Meetings of Shareholders. At any special meeting of shareholders, only such business shall be conducted or considered as shall have been properly brought before the meeting pursuant to the Corporation’s notice of meeting. To be properly brought before a special meeting, proposals of business must be (i) specified in the Corporation’s notice of meeting (or any supplement thereto) given by or at the direction of the Board of Directors or (ii) otherwise properly brought before the special meeting by or at the direction of the Board of Directors. Nominations of persons for election to the Board of Directors may be made at a special meeting of shareholders at which directors are to be elected pursuant to the Corporation’s notice of meeting (A) by or at the direction of the Board of Directors or (B) provided that the Board of Directors has determined that directors shall be elected at such meeting, by any shareholder of the Corporation who (x) is a shareholder of record at the time the shareholder gives the notice of such nomination or proposal required by Article I, Section 11, at the time of giving of notice of such special meeting by or at the direction of the Board of Directors and at the time of the special meeting, (y) is entitled to vote at the meeting and (z) complies with the procedures set forth in these Bylaws as to such nomination. The immediately preceding sentence shall be the exclusive means for a shareholder to make nominations before a special meeting of the shareholders.

(c)    Chairperson of the Meeting. Meetings of the shareholders shall be presided over by the Chair of the Board or, if the Chair of the Board is not present, by a Vice Chair of the Board, if elected, or if the Chair of the Board and any Vice Chair of the Board, if elected, are not present, by the Chief Executive Officer or, if the Chief Executive Officer is not present, by a chairperson designated by the Board of Directors or, if the Board of Directors has not made such a designation, by a chairperson chosen by the shareholders at the meeting. The Secretary shall act as secretary of the meeting but, in the Secretary’s absence, the chairperson of the meeting may appoint any person to act as secretary of the meeting.

(d)    Conduct of Meetings. The Board of Directors may adopt such rules, regulations, and procedures for the conduct of any meeting of shareholders that it deems appropriate. Except to the extent inconsistent with such rules, regulations, and procedures adopted by the Board of Directors, the chairperson of the meeting shall have the right and authority to prescribe such rules, regulations, and procedures and to do all such acts and things as are necessary or desirable for the proper conduct of the meeting, including, without limitation, to adjourn or recess the meeting, dismiss business not properly presented, adopt rules, regulations and procedures to maintain order and safety, impose limitations on the time allotted to questions or comments on the affairs of the Corporation, restrict entry to such meeting after the time prescribed for the commencement thereof and open and close the voting polls. The Board of Directors may postpone or reschedule any meeting of shareholders.

Section 11.    Advance Notice of Shareholder Business and Nominations.

(a)    Annual Meetings of Shareholders. Without qualification or limitation, for any nomination or any other business to be properly brought before an annual meeting by a shareholder pursuant to Article I, Section 10(a), the shareholder must have given timely notice thereof in proper form (including, in the case of a nomination, the completed and signed questionnaire, representation and agreement required by Article I, Section 13) and timely updates and supplements thereof in writing to the Secretary and such other business must otherwise be a proper matter for shareholder action. To be timely, a shareholder’s notice shall be delivered to the Secretary, by registered or certified United States mail, at the principal executive offices of the Corporation not earlier than the close of business on the 120th day and not later than the close of business on the 90th day prior to the first anniversary of the preceding year’s annual meeting; provided, however, that in the event that the date of the annual meeting is more than 30 days before or more than 60 days after such anniversary date, notice by the shareholder must be so delivered not earlier than the close of business on the 120th day prior to the date of such annual meeting and not later than the close of business on the later of the 90th day prior to the date of such annual meeting or, if the first public announcement of the date of such annual meeting is less than 100 days prior to the date of such annual meeting, the 10th day following the day on which public announcement of the date of such meeting is first made by the Corporation. In no event shall any adjournment or postponement of an annual meeting, or the public announcement thereof, commence a new time period for the giving of a shareholder’s notice as described above. Notwithstanding anything in the preceding two sentences to the contrary, in the event that the number of directors to be elected to the Board of Directors is increased by the Board of Directors, and there is no public announcement by the Corporation naming all of the nominees for director or specifying the size of the increased Board of Directors at least 100 days prior to the first anniversary of the preceding year’s annual meeting, a shareholder’s notice required by this Article I, Section 11(a) shall also be considered timely, but only with respect to nominees for any new positions created by such increase, if it shall be delivered to the Secretary, by registered or certified United States mail, at the principal executive offices of the Corporation not later than the close of business on the 10th day following the day on which such public announcement is first made by the Corporation. In addition, to be timely, a shareholder’s notice shall

further be updated and supplemented, if necessary, so that such notice shall be true and correct as of the record date for the meeting and as of the date that is 10 business days prior to the meeting or any adjournment or postponement thereof, and such update and supplement shall be delivered to the Secretary, by registered or certified United States mail, at the principal executive offices of the Corporation not later than five business days after the record date for the meeting in the case of the update and supplement required to be made as of the record date, and not later than eight business days prior to the date for the meeting or any adjournment or postponement thereof in the case of the update and supplement required to be made as of 10 business days prior to the meeting or any adjournment or postponement thereof. If a shareholder who has given timely notice as required herein to make a nomination or bring other business before any such meeting intends to authorize another person to act for such shareholder as a proxy to present the proposal at such meeting, the shareholder shall give notice of such authorization in writing to the Secretary, by registered or certified United States mail, at the principal executive offices of the Corporation not less than three business days before the date of the meeting, including the name and contact information for such person.

(b)    Special Meetings of Shareholders. In the event the Corporation calls a special meeting of shareholders for the purpose of electing one or more directors to the Board of Directors, any shareholder entitled to make a nomination pursuant to Article I, Section 10(b) may nominate a person or persons (as the case may be) for election to such position(s) to be elected as specified in the Corporation’s notice calling the meeting, provided that the shareholder gives timely notice thereof in proper form (including the completed and signed questionnaire, representation and agreement required by Article I, Section 13) and timely updates and supplements thereof in writing to the Secretary, by registered or certified United States mail. In order to be timely, a shareholder’s notice shall be delivered to the Secretary, by registered or certified United States mail, at the principal executive offices of the Corporation not earlier than the close of business on the 120th day prior to the date of such special meeting and not later than the close of business on the later of the 90th day prior to the date of such special meeting or, if the first public announcement of the date of such special meeting is less than 100 days prior to the date of such special meeting, the 10th day following the day on which public announcement is first made of the date of the special meeting and of the nominees proposed by the Board of Directors to be elected at such meeting. In no event shall any adjournment or postponement of a special meeting, or the public announcement thereof, commence a new time period for the giving of a shareholder’s notice as described above. In addition, to be timely, a shareholder’s notice shall further be updated and supplemented, if necessary, so that such notice shall be true and correct as of the record date for the meeting and as of the date that is 10 business days prior to the meeting or any adjournment or postponement thereof, and such update and supplement shall be delivered to the Secretary, by registered or certified United States mail, at the principal executive offices of the Corporation not later than five business days after the record date for the meeting in the case of the update and supplement required to be made as of the record date, and not later than eight business days prior to the date for the meeting or any adjournment or postponement thereof in the case of the update and supplement required to be made as of 10 business days prior to the meeting or any adjournment or postponement thereof. If a shareholder who has given timely notice as required herein to bring any business before any such meeting intends to authorize another person to act for such shareholder as a proxy to present the proposal at such meeting, the shareholder shall give notice of such authorization in writing to the Secretary, by registered or certified United States mail, at the principal executive offices of the Corporation not less than three business days before the date of the meeting, including the name and contact information for such person.

(c)    Other Provisions.

(1)    To be in proper form, a shareholder’s notice (whether given pursuant to Article I, Section 11(a) or (b)) to the Secretary must include the following, as applicable:

(i)    as to the shareholder giving the notice and the beneficial owner, if any, on whose behalf the nomination or proposal is made: (A) the name and address of such shareholder, as they appear on the Corporation’s books, of such beneficial owner, if any, and of their respective affiliates or associates or others acting in concert therewith, (B) (I) the class or series and number of shares of the Corporation which are, directly or indirectly, owned beneficially and of record by such shareholder, such beneficial owner, if any, and their respective affiliates or associates or others acting in concert therewith, including the name and number of shares of the Corporation held by any broker, bank or other nominee on any such person’s or entity’s behalf, (II) any option, warrant, convertible security, stock appreciation right, or similar right with an exercise or conversion privilege or a settlement payment or mechanism at a price related to any class or series of shares of the Corporation or with a value derived in whole or in part from the value of any class or series of shares of the Corporation, or any derivative or synthetic arrangement having the characteristics of a long position in any class or series of shares of the Corporation, or any contract, derivative, swap or other transaction or series of transactions designed to produce economic benefits and risks that correspond substantially to the ownership of any class or series of shares of the Corporation, including due to the fact that the value of such contract, derivative, swap or other transaction or series of transactions is determined by reference to the price, value or volatility of any class or series of shares of the Corporation, whether or not such instrument, contract or right shall be subject to settlement in the underlying class or series of shares of the Corporation, through the delivery of cash or other property, or otherwise, and without regard to whether the shareholder of record, such beneficial owner, if any,

or any of their respective affiliates or associates or others acting in concert therewith, may have entered into transactions that hedge or mitigate the economic effect of such instrument, contract or right, or any other direct or indirect opportunity to profit or share in any profit derived from any increase or decrease in the value of shares of the Corporation (any of the foregoing, a “Derivative Instrument”) directly or indirectly owned beneficially by such shareholder, such beneficial owner, if any, or any of their respective affiliates or associates or others acting in concert therewith, (III) any proxy (other than a revocable proxy given in response to a solicitation made pursuant to, and in accordance with, Section 14(a) of the Exchange Act by way of a solicitation statement filed on Schedule 14A and which is not also then reportable on Schedule 13D under the Exchange Act), contract, arrangement, or understanding pursuant to which such shareholder, such beneficial owner, if any, or any of their respective affiliates or associates or others acting in concert therewith, has a right to vote any class or series of shares of the Corporation, (IV) any agreement, arrangement, understanding, or otherwise, including any repurchase or similar so-called “stock borrowing” agreement or arrangement, engaged in, directly or indirectly, by such shareholder, such beneficial owner, if any, or any of their respective affiliates or associates or others acting in concert therewith, the purpose or effect of which is to mitigate loss to, reduce the economic risk (of ownership or otherwise) of any class or series of the shares of the Corporation by, manage the risk of share price changes for, or increase or decrease the voting power of, such shareholder, such beneficial owner, if any, or any of their respective affiliates or associates or others acting in concert therewith, with respect to any class or series of the shares of the Corporation, or which provides, directly or indirectly, the opportunity to profit or share in any profit derived from any decrease in the price or value of any class or series of the shares of the Corporation (any of the foregoing, “Short Interests”), (V) any rights to distributions on the shares of the Corporation owned beneficially by such shareholder, such beneficial owner, if any, or any of their respective affiliates or associates or others acting in concert therewith, that are separated or separable from the underlying shares of the Corporation, (VI) any proportionate interest in shares of the Corporation or Derivative Instruments held, directly or indirectly, by a general or limited partnership in which such shareholder, such beneficial owner, if any, or any of their respective affiliates or associates or others acting in concert therewith, is a general partner or, directly or indirectly, beneficially owns an interest in a general partner of such general or limited partnership, (VII) any performance-related fees (other than an asset-based fee) to which such shareholder, such beneficial owner, if any, or any of their respective affiliates or associates or others acting in concert therewith, is entitled based on any increase or decrease in the value of shares of the Corporation or Derivative Instruments, if any, (VIII) any significant equity interests or any Derivative Instruments or Short Interests in any principal competitor of the Corporation or any subsidiary of the Corporation held by such shareholder, such beneficial owner, if any, or any of their respective affiliates or associates or others acting in concert therewith, (IX) any direct or indirect interest of such shareholder, such beneficial owner, if any, or any of their respective affiliates or associates or others acting in concert therewith, in any contract with the Corporation or any subsidiary of the Corporation, and (X) any debt securities or other debt instruments of the Corporation or any of its subsidiaries held by such shareholder, such beneficial owner, if any, or any of their respective affiliates or associates or others acting in concert therewith, (C) a representation as to whether the shareholder, such beneficial owner, if any, or any of their respective affiliates or associates or others acting in concert therewith intends to solicit proxies in support of, as applicable, (I) such business or (II) director nominees other than the Corporation’s nominees in accordance with Rule 14a-19 promulgated under the Exchange Act (“Rule 14a-19”), and (D) any other information relating to such shareholder, such beneficial owner, if any, or any of their respective affiliates or associates or others acting in concert therewith, that would be required to be disclosed in a proxy statement and form of proxy or other filings required to be made in connection with solicitations of proxies for, as applicable, the proposal and/or for the election of directors in a contested election pursuant to Section 14 of the Exchange Act and the rules and regulations promulgated thereunder;

(ii)    if the notice relates to any business other than a nomination of a director or directors that the shareholder proposes to bring before the meeting, a shareholder’s notice must, in addition to the matters set forth in paragraph (i) above, also set forth: (A) a brief description of the business desired to be brought before the meeting, the reasons for conducting such business at the meeting and any material interest of such shareholder, such beneficial owner, if any, or any of their respective affiliates or associates or others acting in concert therewith, in such business, (B) the text of the proposal or business (including the text of any resolutions proposed for consideration), and (C) a description of all agreements, arrangements and understandings between such shareholder, such beneficial owner, if any, or any of their respective affiliates or associates or others acting in concert therewith, on the one hand, and any other person or persons (including their names), on the other hand, in connection with the proposal of such business by such shareholder;

(iii)    as to each person, if any, whom the shareholder proposes to nominate for election or reelection to the Board of Directors, a shareholder’s notice must, in addition to the matters set forth in paragraph (i) above, also set forth: (A) all information relating to such person that would be required to be disclosed in a proxy statement or other filings required to be made in connection with solicitations of proxies for election of directors in a contested election pursuant to Section 14 of the Exchange Act and the rules and regulations promulgated thereunder (including such person’s written consent to being named in a proxy statement as a nominee and to serving as a director if elected) and (B) a description of all direct and indirect compensation and other material monetary agreements, arrangements and understandings during the past three years, and any other material relationships, between or among such shareholder, such beneficial owner, if any, or any of

their respective affiliates or associates or others acting in concert therewith, on the one hand, and each proposed nominee, such proposed nominee’s affiliates and associates or others acting in concert therewith, on the other hand, including, without limitation, all information that would be required to be disclosed pursuant to Rule 404 promulgated under Regulation S-K if the shareholder making the nomination and any beneficial owner on whose behalf the nomination is made, if any, or any affiliate or associate thereof or person acting in concert therewith, were the “registrant” for purposes of such rule and the nominee were a director or executive officer of such registrant; and

(iv)    as to each person, if any, whom the shareholder proposes to nominate for election or reelection to the Board of Directors, a shareholder’s notice must, in addition to the matters set forth in paragraphs (i) and (iii) above, also include a completed and signed questionnaire, representation and agreement required by Article I, Section 13. The Corporation may require any proposed nominee to furnish within 15 days of such request such other information as may reasonably be requested by the Corporation to determine the eligibility of such proposed nominee to serve as a director of the Corporation under applicable law, rule or regulation, that may be required to be provided concerning such nominee to any governmental or regulatory authority having authority to regulate or oversee the Corporation, its subsidiaries or their respective businesses, to serve as an independent director of the Corporation or that could be material to a reasonable shareholder’s understanding of the independence, or lack thereof, of such nominee.

(2)    For purposes of these Bylaws, “public announcement” shall mean disclosure in a press release reported by a national news service, including the Dow Jones News Service and the Associated Press, or in a document publicly filed by the Corporation with the Securities and Exchange Commission pursuant to Section 13, 14 or 15(d) of the Exchange Act and the rules and regulations promulgated thereunder.

(3)    In addition to the requirements set forth in these Bylaws, a shareholder and its affiliates and associates shall also comply with all applicable requirements of state and federal law, including the Exchange Act and the rules and regulations thereunder (including Rule 14a-19), with respect to any nomination, proposal or other matters set forth in these Bylaws. Without limiting the generality of the foregoing, unless otherwise required by law, (i) no shareholder, beneficial owner, if any, on whose behalf a nomination is made, or any of their respective affiliates or associates or others acting in concert therewith, shall solicit proxies in support of director nominees other than the Corporation’s nominees unless such person has complied with Rule 14a-19 in connection with the solicitation of such proxies, and (ii) if any shareholder, any beneficial owner or any of their respective affiliates or associates or others acting in concert therewith (A) provides notice pursuant to Rule 14a-19(b) (it being understood that such notice shall be in addition to the notices required by this Article I, Section 11) and (B) subsequently fails to comply with the requirements of Rule 14a-19, or fails to timely provide reasonable evidence sufficient to satisfy the Corporation that such person has met the requirements of Rule 14a-19(a) in accordance with the following sentence, then the Corporation shall disregard any proxies or votes solicited for the shareholder’s or beneficial owner’s director nominees. If a shareholder, any beneficial owner or any of their respective affiliates or associates or others acting in concert therewith provides notice pursuant to Rule 14a-19(b), such person shall deliver to the Corporation, no later than seven (7) business days prior to the applicable meeting, reasonable evidence that it has met the applicable requirements of Rule 14a-19. In no event may any shareholder nominate a greater number of director candidates than are subject to election by the shareholders at the applicable meeting. Any shareholder directly or indirectly soliciting proxies from other shareholders must use a proxy card color other than white, which shall be reserved for the exclusive use by the Board of Directors.

(4)    For the avoidance of doubt, a shareholder’s obligation to update and/or supplement such shareholder’s notice under these Bylaws, as set forth in this Article I, Section 11, shall not be deemed to permit such shareholder to cure any defects in any such notice existing as of the time required for the giving of such notice, limit the rights or remedies (including without limitation under these Bylaws) available to the Corporation relating to any such defect, or extend any applicable deadlines hereunder or otherwise applicable to any nomination or proposal, nor shall a shareholder be permitted to amend, update or submit a new nomination or proposal, including by changing or adding nominees or proposals proposed to be brought before a meeting of the shareholders, after the time first required for the giving of the shareholder’s notice under these Bylaws.

(5)    The chairperson of any annual or special meeting of shareholders shall have the power and authority to determine whether a nomination or other business proposed to be brought before the meeting was made or proposed, as the case may be, in accordance with the Articles of Incorporation and these Bylaws and, if any proposed nomination or other business was not made or proposed, as the case may be, in compliance with the Articles of Incorporation or these Bylaws, may dismiss such proposed nomination or other business and declare that no action shall be taken on such nomination or other business and that such nomination or other business shall be disregarded.

(6)    Nothing in these Bylaws shall be deemed to affect any rights (i) of shareholders to request inclusion of proposals in the Corporation’s proxy statement pursuant to Rule 14a-8 under the Exchange Act, (ii) of the holders

of any series of preferred stock of the Corporation if and to the extent provided for under law or the Articles of Incorporation or (iii) of shareholders to act by unanimous written consent in accordance with the Articles of Incorporation and applicable law.

Section 12.    Proxy Access for Board of Director Nominations.

(a)    The Corporation shall include in its proxy statement for any annual meeting of shareholders the name, together with the Required Information (as defined below), of any person nominated for election to the Board of Directors (a “Shareholder Nominee”) identified in a timely notice (the “Notice”) that satisfies this Article I, Section 12 delivered to the principal executive offices of the Corporation, addressed to the Secretary, by one or more shareholders who at the time the request is delivered satisfy the ownership and other requirements of this Article I, Section 12 (such shareholder or shareholders, and any director, executive officer or general partner of such shareholder or any such affiliate or associate or person with which such shareholder is acting in concert of such shareholder or shareholders, the “Eligible Shareholder”), and who expressly elects to have its nominee included in the Corporation’s proxy materials pursuant to this Article I, Section 12. To be timely for purposes of this Article I, Section 12, the Notice must be received by the Secretary, by registered or certified United States mail, at the principal executive offices of the Corporation not later than the close of business on the 120th day nor earlier than the close of business on the 150th day prior to the anniversary date of the immediately preceding mailing date for the notice of annual meeting of shareholders.

(b)    For purposes of this Article I, Section 12, the “Required Information” that the Corporation will include in its proxy statement is (i) the information concerning the Shareholder Nominee and the Eligible Shareholder that, as determined by the Corporation, is required to be disclosed in a proxy statement filed pursuant to the proxy rules of the SEC, (ii) the Nominee Statement (as defined below) for each Shareholder Nominee to be included in the proxy statement of the Corporation, and (iii) if the Eligible Shareholder so elects, a Shareholder Statement (as defined below).

(c)    The number of Shareholder Nominees (including any Shareholder Nominee elected to the Board of Directors at either of the two preceding annual meetings of shareholders who is being re-nominated by the Board of Directors to stand for reelection and any Shareholder Nominees submitted by an Eligible Shareholder for inclusion in the Corporation’s proxy materials pursuant to this Article I, Section 12 but either are subsequently withdrawn or that the Board of Directors or any committee designated by the Board of Directors decides to nominate for election to the Board of Directors (a “Board Nominee”)) appearing in the Corporation’s proxy materials with respect to a meeting of shareholders shall not exceed the greater of (i) two and (ii) 20% of the number of directors in office as of the last day on which the Notice may be delivered, or if such amount is not a whole number, the closest whole number below 20%; provided, however, that the number of Shareholder Nominees appearing in the Corporation’s proxy materials pursuant to this Article I, Section 12 may be reduced, in the sole discretion of the Board of Directors, by the number of director candidates for which the Secretary of the Corporation receives a notice that a shareholder has nominated a director candidate for election to the Board of Directors pursuant to the requirements of Article I, Section 10(a) and does not expressly elect at the time of providing the notice to have its nominee included in the Corporation’s proxy materials pursuant to this Article I, Section 12. In the event that the number of Shareholder Nominees submitted by Eligible Shareholders pursuant to this Article I, Section 12 exceeds this maximum number, each Eligible Shareholder shall select one Shareholder Nominee for inclusion in the Corporation’s proxy materials until the maximum number is reached, going in the order of the amount (largest to smallest) of shares of the Corporation’s stock eligible to vote in the election of directors each Eligible Shareholder disclosed as owned in the Notice. If the maximum number is not reached after each Eligible Shareholder has selected one Shareholder Nominee, this selection process shall continue as many times as necessary, following the same order each time, until the maximum number is reached.

(d)    An Eligible Shareholder must have owned (as defined below) 3% or more of the outstanding shares of the Corporation’s stock eligible to vote in the election of directors continuously for at least three years (the “Required Shares”) as of both the date the Notice is delivered to the Corporation and the record date for determining shareholders entitled to vote at the annual meeting of shareholders and must continue to own the Required Shares through the annual meeting of shareholders. For purposes of satisfying the foregoing ownership requirement under this Article I, Section 12, (i) the shares of stock of the Corporation owned by one or more shareholders, or by the person or persons who own shares of the Corporation’s stock and on whose behalf any shareholder is acting, may be aggregated, provided that the number of shareholders and other persons whose ownership of shares is aggregated for such purpose shall not exceed 20, and further provided that the group of shareholders shall have provided to the Secretary of the Corporation as a part of providing the Notice a written agreement executed by each of its members designating one of the members as the exclusive member to interact with the Corporation for purposes of this Article I, Section 12 on behalf of all members, and (ii) two or more funds that are (A) under common management and investment control, (B) under common management and funded primarily by the same employer, or (C) a “group of investment companies,” as such term is defined in Section 12(d)(1)(G)(ii) of the Investment Company Act of 1940, as amended, shall be treated as one shareholder or beneficial owner. No effect will be given to the Eligible Shareholder’s votes with respect to the election of directors if the Eligible Shareholder does not comply with each of the representations in Article I,

Section 12(d)(4). Within the time period specified for providing the Notice, an Eligible Shareholder must provide the following information in writing to the Secretary of the Corporation (in addition to the information required to be provided by Article I, Section 11):

(1)    one or more written statements from the record holder of the shares (and from each intermediary through which the shares are or have been held during the requisite three-year holding period) verifying that, as of a date within seven calendar days prior to the date the Notice is delivered to or mailed and received by the Corporation, the Eligible Shareholder owns, and has owned continuously for the preceding three years, the Required Shares, and the Eligible Shareholder’s agreement to provide, within five business days after the record date for the annual meeting of shareholders, written statements from the record holder and intermediaries verifying the Eligible Shareholder’s continuous ownership of the Required Shares through the record date;

(2)    the written consent of each Shareholder Nominee to be named in the proxy statement as a nominee and to serve as a director if elected;

(3)    a copy of the Schedule 14N that has been filed with the SEC as required by Rule 14a-18 under the Exchange Act;

(4)    a representation that the Eligible Shareholder:

(i)    acquired the Required Shares in the ordinary course of business and not with the intent to change or influence control of the Corporation, and does not presently have such intent;

(ii)    has not nominated and will not nominate for election to the Board of Directors at the annual meeting of shareholders any person other than the Shareholder Nominee(s) being nominated pursuant to this Article I, Section 12;

(iii)    has not engaged and will not engage in, and has not and will not be, a “participant” in another person’s “solicitation” within the meaning of Rule 14a-1(l) under the Exchange Act in support of the election of any individual as a director at the annual meeting of shareholders other than its Shareholder Nominee(s) or a Board Nominee;

(iv)    will not distribute to any shareholder any form of proxy for the annual meeting of shareholders other than the form distributed by the Corporation;

(v)    will continue to own the Required Shares through the annual meeting of shareholders; and

(vi)    will provide facts, statements and other information in all communications with the Corporation and its shareholders that are or will be true and correct in all material respects and do not and will not omit to state a material fact necessary in order to make the statements made, in light of the circumstances under which they were made, not misleading;

(5)    an undertaking that the Eligible Shareholder agrees to:

(i)    assume all liability stemming from any legal or regulatory violation arising out of the Eligible Shareholder’s communications with the Corporation’s shareholders or out of the information that the Eligible Shareholder provided to the Corporation;

(ii)    indemnify and hold harmless the Corporation and each of its directors, officers and employees individually against any liability, loss or damages in connection with any threatened or pending action, suit or proceeding, whether legal, administrative or investigative, against the Corporation or any of its directors, officers or employees arising out of any nomination submitted by the Eligible Shareholder pursuant to this Article I, Section 12;

(iii)    file with the SEC all soliciting and other materials as required under Article I, Section 12(i); and

(iv)    comply with all other applicable laws, rules, regulations and listing standards with respect to any solicitation in connection with the annual meeting of shareholders; and

(6)    written disclosure of any transactions between the Eligible Shareholder and the Shareholder Nominee or the Board Nominee within the preceding five years.

(e)    For purposes of this Article I, Section 12, an Eligible Shareholder shall be deemed to “own” only those outstanding shares of the Corporation’s stock as to which a shareholder who is the Eligible Shareholder or is included in the group that constitutes the Eligible Shareholder possesses both (i) the full voting and investment rights pertaining to the shares and (ii) the full economic interest in (including the opportunity for profit and risk of loss on) such shares; provided that the number of shares calculated in accordance with clauses (i) and (ii) shall not include any shares (A) sold by or on behalf of such shareholder in any transaction that has not been settled or closed, (B) borrowed by or on behalf of such shareholder for any purpose or purchased by such shareholder pursuant to an agreement to resell or (C) subject to any option, warrant, forward contract, swap, contract of sale, other derivative or similar agreement entered into by or on behalf of such shareholder, whether any such instrument or agreement is to be settled with shares or with cash based on the notional amount or value of outstanding shares of the Corporation’s stock, in any such case which instrument or agreement has, or is intended to have, the purpose or effect of (x) reducing in any manner, to any extent or at any time in the future, such shareholder’s full right to vote or direct the voting of any such shares, and/or (y) hedging, offsetting or altering to any degree gain or loss arising from the full economic ownership of such shares by such shareholder. A shareholder shall “own” shares held in the name of a nominee or other intermediary so long as the shareholder retains the right to instruct how the shares are voted with respect to the election of directors and possesses the full economic interest in the shares. A shareholder’s ownership of shares shall be deemed to continue during any period in which the shareholder has delegated any voting power by means of a proxy, power of attorney or other instrument or arrangement that is revocable at any time by the shareholder, provided, that (i) such person revokes such delegation within five business days of being notified that its Shareholder Nominee will be included in the Corporation’s proxy statement for the relevant annual meeting of shareholders and (ii) such person holds the revoked shares through the annual meeting of shareholders. Whether outstanding shares of the Corporation’s stock are “owned” for these purposes shall be determined by the Board of Directors, which determination shall be conclusive and binding on the Corporation and its shareholders, including the Eligible Shareholder.

(f)    The Eligible Shareholder may provide to the Secretary of the Corporation, within the time period specified for providing the Notice, a written statement for inclusion in the Corporation’s proxy statement for the annual meeting of shareholders, not to exceed 500 words, in support of the Shareholder Nominee’s candidacy (the “Shareholder Statement”). Notwithstanding anything to the contrary contained in this Article I, Section 12, the Corporation may omit from its proxy materials any information or statement that it believes would violate any applicable law, rule, regulation or listing standard.

(g)    The Corporation shall not be required to include, pursuant to this Article I, Section 12, a Shareholder Nominee in its proxy materials:

(1)    if the Eligible Shareholder who has nominated such Shareholder Nominee has engaged in or is currently engaged in, or has been, or is a “participant” in another person’s, “solicitation” within the meaning of Rule 14a-1(l) under the Exchange Act in support of the election of any individual as a director at the annual meeting of shareholders other than its Shareholder Nominee(s) or a Board Nominee;

(2)    who is not independent under the listing standards of the principal exchange upon which the Corporation’s stock is traded, any applicable rules of the SEC and any publicly disclosed standards used by the Board of Directors in determining and disclosing the independence of the Corporation’s directors, as determined by the Board of Directors;

(3)    whose election as a member of the Board of Directors would cause the Corporation to be in violation of these Bylaws, the Articles of Incorporation, the listing standards of the principal exchange upon which the Corporation’s stock is traded, or any applicable state or federal law, rule or regulation;

(4)    who is or has been, within the past three years, an officer or director of a competitor, as defined in Section 8 of the Clayton Antitrust Act of 1914;

(5)    who is a named subject of a pending criminal proceeding (excluding traffic violations and other minor offenses) or has been convicted in such a criminal proceeding within the past 10 years;

(6)    who is subject to any order of the type specified in Rule 506(d) of Regulation D promulgated under the Securities Act of 1933, as amended;

(7)    if such Shareholder Nominee or the applicable Eligible Shareholder shall have provided

information to the Corporation in respect of such nomination that was untrue in any material respect or omitted to state a material fact necessary in order to make the statements made, in light of the circumstances under which they were made, not misleading, as determined by the Board of Directors;

(8)    if the Eligible Shareholder who has nominated such Shareholder Nominee has filed a Schedule 13D with respect to the Corporation within the past year; or

(9)    if the Eligible Shareholder or applicable Shareholder Nominee otherwise breaches any of its or their obligations, agreements or representations under this Article I, Section 12.

(h)    Notwithstanding anything to the contrary set forth herein, the chairperson of the annual meeting of shareholders shall declare a nomination by an Eligible Shareholder to be invalid, and such nomination shall be disregarded notwithstanding that proxies in respect of such vote may have been received by the Corporation, if the Shareholder Nominee(s) and/or the applicable Eligible Shareholder shall have breached its or their obligations, agreements or representations under this Article I, Section 12, as determined by the Board of Directors or the chairperson of the annual meeting of shareholders.

(i)    The Eligible Shareholder shall file with the SEC any solicitation communication with the Corporation’s shareholders relating to the annual meeting of shareholders at which the Shareholder Nominee will be nominated, regardless of whether any such filing is required under Regulation 14A of the Exchange Act, or whether any exemption from filing is available for such solicitation communication under Regulation 14A of the Exchange Act.

(j)    No person may be a member of more than one group of persons constituting an Eligible Shareholder under this Article I, Section 12.

(k)    Any Shareholder Nominee who is included in the Corporation’s proxy materials for a particular annual meeting of shareholders but either (i) withdraws from or becomes ineligible or unavailable for election at the annual meeting of shareholders, or (ii) does not receive at least 20% of the votes cast in favor of the Shareholder Nominee’s election, shall be ineligible to be a Shareholder Nominee pursuant to this Article I, Section 12 for the next two annual meetings of shareholders following the annual meeting of shareholders for which the Shareholder Nominee has been nominated for election.

(l)    The Shareholder Nominee must provide to the Secretary of the Corporation, within the time period specified for providing the Notice, a written statement for inclusion in the Corporation’s proxy statement for the annual meeting of shareholders (the “Nominee Statement”), disclosing whether or not such Shareholder Nominee is or will become a party to any agreement, arrangement or understanding with any person or entity other than the Corporation with respect to any direct or indirect compensation, reimbursement or indemnification in connection with service or action as a Shareholder Nominee or director. Such Nominee Statement must also include a representation that if such Shareholder Nominee is elected as a director of the Corporation, such Shareholder Nominee will not agree or accept any increase in the amount or scope, as applicable, of any such compensation, reimbursement or indemnification and that they would be in compliance with applicable law and the Corporation’s corporate governance guidelines and other policies applicable to directors generally. At the request of the Corporation, the Shareholder Nominee must promptly, but in any event within five business days of such request, submit the written questionnaire described in Article I, Section 13. The Corporation may request such additional information (i) as may be reasonably necessary to permit the Board of Directors or any committee thereof to determine if a Shareholder Nominee is independent under the listing standards of the principal exchange upon which the Corporation’s stock is traded, any applicable rules of the SEC and any publicly disclosed standards used by the Board of Directors in determining and disclosing the independence of the Corporation’s directors and otherwise to determine the eligibility of each Shareholder Nominee to service as a director of the Corporation, or (ii) that could be material to a reasonable shareholder’s understanding of the independence, or lack thereof, of each Shareholder Nominee. Notwithstanding anything to the contrary contained in this Article I, Section 12, the Corporation may omit from its proxy materials any information or statement that it believes would violate any applicable law, rule, regulation or listing standard.

Section 13.    Submission of Questionnaire, Representation and Agreement. To be eligible to be a nominee for election or reelection as a director of the Corporation, a person nominated by a shareholder must deliver (in accordance with the time periods prescribed for delivery of notice under Article I, Section 11 or Section 12, as applicable) to the Secretary, by registered or certified United States mail, at the principal executive offices of the Corporation a written questionnaire with respect to the background and qualification of such person and the background of any other person or entity on whose behalf the nomination is being made (which questionnaire shall be provided by the Secretary upon written request of the shareholder), and a written representation and agreement (in the form provided by the Secretary upon written request of the shareholder) that such person (a) is not and will not become a party to (i) any agreement, arrangement or understanding with, and has not given

any commitment or assurance to, any person or entity as to how such person, if elected as a director of the Corporation, will act or vote on any issue or question (a “Voting Commitment”) that has not been disclosed to the Corporation or (ii) any Voting Commitment that could limit or interfere with such person’s ability to comply, if elected as a director of the Corporation, with such person’s fiduciary duties under applicable law, (b) is not and will not become a party to any agreement, arrangement or understanding with any person or entity other than the Corporation with respect to any direct or indirect compensation, reimbursement or indemnification in connection with service or action as a director that has not been disclosed therein and (c) in such person’s individual capacity and on behalf of any person or entity on whose behalf the nomination is being made, would be in compliance, if elected as a director of the Corporation, and will comply with all applicable corporate governance, conflict of interest, confidentiality and publicly disclosed stock ownership and trading policies and guidelines of the Corporation.

ARTICLE II

DIRECTORS

Section 1.    General Powers. The Corporation shall have a Board of Directors. All corporate powers shall be exercised by or under the authority of, and the business and affairs of the Corporation managed under the direction of, and subject to the oversight of, its Board of Directors, subject to any limitation set forth in the Articles of Incorporation.

Section 2.    Number. The number of directors of the Corporation shall be not less than three nor more than fifteen, the exact number of directors to be fixed, from time to time, by a resolution of the Board of Directors.

Section 3.    Election and Term. Directors shall be elected at each annual meeting of shareholders. Despite the expiration of a director’s term, such director shall continue to serve until such director’s successor is elected and qualifies or until there is a decrease in the number of directors. No individual shall be named or elected as a director without such individual’s prior consent.

Except with respect to vacancies on the Board of Directors, which shall be filled as provided in Article II, Section 4, each director shall be elected by a majority of votes cast of the voting group or groups entitled to elect such director at any meeting of shareholders for the election of directors at which a quorum is present; provided that, if the number of director nominees exceeds the number of directors to be elected by any voting group as of the 10th day preceding the date on which the Corporation first mails its notice of meeting for such meeting to the shareholders, the director(s) shall be elected by a plurality of the votes of the shares of such voting group represented at the meeting and entitled to vote on the election of directors.

If an incumbent director is nominated for election and not reelected, the director shall offer the director’s resignation promptly to the Board of Directors. Within 60 days following certification of the shareholder vote, the Nominating/Corporate Governance Committee, or other committee responsible for nominating and governance matters, shall recommend to the Board of Directors the action to be taken with respect to such offer of resignation. Within 90 days following certification of the election results, the Board of Directors shall act on the offered resignation. In determining whether or not to accept the offered resignation, the Board of Directors shall consider any recommendation by the committee, the factors considered by the committee and any additional information and factors that the Board of Directors believes to be relevant. No director who submits a resignation under this Article II, Section 3 shall participate in the deliberations or decisions of the committee or the Board of Directors regarding such director’s resignation.

If the submitted resignation is not accepted by the Board of Directors, the Board of Directors shall disclose its reasons for not accepting the resignation, and the director shall continue to serve until the next annual meeting of shareholders and until the director’s successor is duly elected, or the director’s earlier resignation or removal. If a director’s resignation is accepted by the Board of Directors, or if a nominee for director is not elected by the shareholders, then the Board of Directors, in its sole discretion, may fill any resulting vacancy in accordance with Article II, Section 4.

Section 4.    Removal; Vacancies. The shareholders may remove any director with or without cause at a meeting called for that purpose. Removal of a director shall be effective only if approved by a majority of the votes entitled to be cast at an election of directors of the voting group or groups by which such director was elected. A vacancy on the Board of Directors, including a vacancy resulting from the removal of a director, or an increase in the number of directors, may be filled only by (i) the shareholders, (ii) the Board of Directors, or (iii) the majority vote of the remaining directors though less than a quorum of the Board of Directors. In the case of the resignation of a director that will become effective at a specified later date, the vacancy may be filled before it occurs but the new director may not take office until the vacancy occurs.

Section 5.    Organization.

(a)    The Board of Directors shall elect one of its members to be the Chair of the Board and may elect one or more of its members to be a Vice Chair of the Board. The Chair of the Board shall preside as chairperson at all meetings of the shareholders and of the Board of Directors and shall perform such duties, and shall have such authority, as may be conferred upon the Chair of the Board by the Board of Directors or these Bylaws. A Vice Chair of the Board, if elected, shall, in the absence of the Chair of the Board, preside as chairperson at all meetings of the shareholders and of the Board of Directors and shall perform such duties, and shall have such authority, as may be conferred upon such Vice Chair of the Board by the Board of Directors or these Bylaws.

(b)    The independent members of the Board of Directors shall designate a Lead Independent Director, who shall not be an officer of or employed by the Corporation and otherwise shall be independent. The Lead Independent Director shall exercise and perform such powers and duties as may be conferred upon the Lead Independent Director by the Board of Directors or these Bylaws. For purposes of this Article II, Section 5(b), “independent” shall have the meaning set forth in the rules or regulations of any stock exchange applicable to the Corporation.

Section 6.    Annual and Regular Meetings. Unless otherwise determined by the Board of Directors, an annual meeting of the Board of Directors shall be held on the same day as the annual meeting of shareholders, for the purpose of electing officers and carrying on such other business as may properly come before such meeting. The Board of Directors may also adopt a schedule of additional meetings which shall be considered regular meetings. Regular meetings shall be held at such times and at such places, within or without the Commonwealth of Virginia, as the Chair of the Board, the Chief Executive Officer or the Board of Directors shall designate from time to time. If no place is designated, regular meetings shall be held at the principal executive offices of the Corporation.

Section 7.    Special Meetings. Special meetings of the Board of Directors may be called by the Chair of the Board, the Lead Independent Director, the Chief Executive Officer or the Board of Directors, and shall be held at such times and at such places, within or without the Commonwealth of Virginia, as the person or persons calling the meetings shall designate. If no such place is designated in the notice of a meeting, it shall be held at the principal executive offices of the Corporation.

Section 8.    Notice of Meetings. No notice need be given of regular meetings of the Board of Directors. Notice of special meetings of the Board of Directors shall be given to each director not less than six hours before the meeting by any means permitted under the Virginia Stock Corporation Act, including electronic transmission. Any such notice shall include the date, time and place (or means of remote communication) of the meeting.

Section 9.    Waiver of Notice. A director may waive any notice required by law, the Articles of Incorporation, or these Bylaws before or after the date and time stated in the notice and such waiver shall be equivalent to the giving of such notice. Except as provided in the next sentence of this Article II, Section 9, the waiver shall be in writing, signed by the director entitled to the notice, and filed with the minutes or corporate records. A director’s attendance at or participation in a meeting waives any required notice to the director of the meeting unless the director at the beginning of the meeting or promptly upon the director’s arrival objects to holding the meeting or transacting business at the meeting and does not thereafter vote for or assent to action taken at the meeting.

Section 10.    Quorum; Voting. A majority of the number of directors prescribed in accordance with these Bylaws, or if no number has been prescribed, the number of directors in office immediately before the meeting begins, shall constitute a quorum for the transaction of business at a meeting of the Board of Directors. The act of a majority of the directors present at a meeting at which a quorum is present shall be the act of the Board of Directors. A director who is present at a meeting of the Board of Directors or a committee of the Board of Directors when corporate action is taken is deemed to have assented to the action taken unless (i) the director objects at the beginning of the meeting, or promptly upon the director’s arrival, to holding it or transacting specified business at the meeting, or (ii) the director votes against, or abstains from, the action taken.

Section 11.    Telephonic Meetings. The Board of Directors may permit any or all directors to participate in a regular or special meeting by, or conduct the meeting through the use of, any means of communication by which all directors participating may simultaneously hear each other during the meeting. A director participating in a meeting by this means is deemed to be present in person at the meeting.

Section 12.    Action Without Meeting. Action required or permitted to be taken at a Board of Directors’ meeting may be taken without a meeting if the action is taken by all members of the Board. The action shall be evidenced by one or more written consents stating the action taken, signed by each director either before or after the action taken, and included in the minutes or filed with the corporate records reflecting the action taken. Action taken under this Article II, Section 12 shall be effective when the last director signs the consent unless the consent specifies a different effective date and states the date of execution by each director, in which event it shall be effective according to the terms of the consent. A written consent and the signing thereof may be accomplished by one or more electronic transmissions.

Section 13.    Compensation. Unless the Articles of Incorporation provide otherwise, the Board of Directors may fix the compensation of directors for their services as directors and may provide for the payment of all expenses incurred by directors in attending meetings of the Board of Directors.

ARTICLE III

COMMITTEES OF DIRECTORS

Section 1.    Committees. The Board of Directors may create one or more committees and appoint members of the Board of Directors to serve on them. Each committee shall have two or more members who serve at the pleasure of the Board of Directors. The creation of a committee and appointment of members to it shall be approved by the number of directors required to take action under Article II, Section 10.

Section 2.    Authority of Committees. To the extent specified by the Board of Directors, each committee may exercise the authority of the Board of Directors under Article II, Section 1 and applicable law, except that a committee may not (i) approve or recommend to shareholders action that is required by law to be approved by shareholders; (ii) fill vacancies on the Board of Directors or on any of its committees; (iii) amend the Articles of Incorporation; (iv) adopt, amend, or repeal these Bylaws; (v) approve a plan of merger not requiring shareholder approval; (vi) authorize or approve a distribution, except according to a formula or method, or within limits, prescribed by the Board of Directors; or (vii) authorize or approve the issuance or sale or contract for sale of shares, or determine the designation and relative rights, preferences, and limitations of a class or series of shares, except that the Board of Directors may authorize a committee, or a senior executive officer of the Corporation, to do so within limits, if any, prescribed by the Board of Directors.

Section 3.    Committee Meetings; Miscellaneous. The provisions of Article II relating to meetings, notice and waiver of notice, quorum and voting, and consents shall apply to committees of directors and their members.

ARTICLE IV

OFFICERS

Section 1.    Officers. The officers of the Corporation shall be a Chief Executive Officer, a Secretary, a Treasurer and a Controller, and may also include one or more Presidents, one or more Vice Presidents and other officers and assistant officers as may be deemed necessary or advisable to carry on the business of the Corporation. In addition, the Board of Directors shall designate from among the officers of the Corporation a chief financial officer and a chief accounting officer (who may be the same person). Any two or more offices may be held by the same person.

Section 2.    Election; Term. Officers shall be elected at the annual meeting of the Board of Directors and may be elected at such other time or times as the Board of Directors shall determine. They shall hold office, unless removed, until the next annual meeting of the Board of Directors or until their successors are elected. Any officer may resign at any time upon written notice to the Board of Directors, and such resignation is effective when notice is delivered unless the notice specifies a later effective date. The Chief Executive Officer also shall have the authority to appoint one or more officers and to prescribe the duties of any such officer, in each case as the Chief Executive Officer may deem necessary or advisable to carry on the business of the Corporation.

Section 3.    Removal of Officers. Any officer or assistant officer may be removed at any time, with or without cause by (i) the Board of Directors or (ii) the Chief Executive Officer.

Section 4.    Chief Executive Officer. The Chief Executive Officer shall be the chief executive officer of the Corporation and shall have general supervision over, responsibility for, and control of the other officers, agents and employees of the Corporation and shall perform such duties, and shall have such authority, as may be lawfully required of, or conferred upon, the Chief Executive Officer by the Board of Directors.

Section 5.    President. Each President shall perform such duties, and shall have such authority, as may lawfully be required of, or conferred upon, such President by the Chief Executive Officer or the Board of Directors.

Section 6.    Vice Presidents. Each Vice President (including any Executive Vice President or Senior Vice President) shall perform such duties, and shall have such authority, as may lawfully be required of, or conferred upon, such Vice President by the Chief Executive Officer or the Board of Directors.

Section 7.    Secretary. The Secretary shall, as secretary of the meetings, record all proceedings at shareholders’ meetings and directors’ meetings in a book or books kept for that purpose. In addition, the Secretary shall maintain or cause to be maintained the record of shareholders of the Corporation, giving the names and addresses of all shareholders and the numbers, classes and series of the shares held by each and the share transfer books.

Section 8.    Treasurer. The Treasurer shall (i) have the custody of all moneys and securities of the Corporation, (ii) deposit the same in the name and to the credit of the Corporation in such depositories as may be designated by, or in accordance with action of, the Board of Directors and (iii) disburse the funds of the Corporation as may be required.

Section 9.    Controller. The Controller shall cause to be kept full and accurate books and accounts of all assets, liabilities and transactions of the Corporation and prepare, or cause to be prepared, statements of the financial condition of the Corporation and proper profit and loss statements covering the operations of the Corporation and such other and additional financial statements, if any, as required by management of the Corporation or the Board of Directors.

Section 10.    Delegation of Power. During the absence, disqualification or inability to act of any of the officers of the Corporation, the Board of Directors or the Chief Executive Officer may delegate the powers of such officer to any other officer or employee of the Corporation.

ARTICLE V

SHARE CERTIFICATES

Section 1.    Form. Shares of the Corporation may, but need not, be represented by certificates. The Board of Directors may authorize the issue of some or all of the shares of the Corporation without certificates. Any such authorization will not affect shares already represented by certificates until they are surrendered to the Corporation. The rights and obligations of shareholders shall be identical whether or not their shares are represented by certificates. Subject to the provisions of Article V, Section 2, certificates shall be signed by any two officers of the Corporation, who may be the same individual. Certificates may (but need not) be sealed with the seal of the Corporation or a facsimile thereof.

Section 2.    Signatures. The signatures of the officers upon a share certificate issued by the Corporation may be facsimiles. If any officer who has signed, or whose facsimile signature has been placed upon a share certificate, shall have ceased to be such officer before such certificate is issued, it may be issued by the Corporation with the same effect as if the signatory were such officer at the date of its issue.

Section 3.    Transfer. The Board of Directors shall have power and authority to make rules and regulations concerning the issue, registration and transfer of shares of the Corporation.

Section 4.    Restrictions on Transfer. A restriction on the transfer or registration of shares is valid and enforceable against the holder or a transferee of the holder if the restriction is lawful and its existence is noted conspicuously on the front or back of the certificate representing the shares or in an information statement with respect to the shares.

Section 5.    Lost or Destroyed Share Certificates. The Corporation may issue a new share certificate in the place of any certificate theretofore issued by it which is alleged to have been lost or destroyed and may require the owner of such certificate, or such owner’s legal representative, to give the Corporation a bond, with or without surety, or such other agreement, undertaking or security as the Board of Directors shall determine is appropriate, to indemnify the Corporation against any claim that may be made against it on account of the alleged loss or destruction or the issuance of any such new certificate.

ARTICLE VI

EXCLUSIVE FORUM

Unless the Corporation consents in writing to the selection of an alternative forum (an “Alternative Forum Consent”), the United States District Court for the Eastern District of Virginia, Alexandria Division, or, in the event that court lacks jurisdiction to hear such action, the Circuit Court of the County of Fairfax, Virginia, shall be the sole and exclusive forum for (i) any derivative action or proceeding brought on behalf of the Corporation, (ii) any action asserting a claim of breach of duty owed by any current or former director, officer, employee, shareholder or agent of the Corporation to the Corporation or the Corporation’s shareholders, including a claim alleging the aiding and abetting of such a breach of duty, (iii) any action asserting a claim arising pursuant to any provision of the Virginia Stock Corporation Act, the Articles of Incorporation or these Bylaws (in each case, as may be amended from time to time), (iv) any action or proceeding to interpret, apply, enforce or determine the validity of the Articles of Incorporation or these Bylaws (in each case, as may be amended from time to time), including any right, obligation, or remedy thereunder, (v) any action or proceeding regarding indemnification or advancement or reimbursement of expenses arising out of the Articles of Incorporation, these Bylaws or otherwise, unless the Corporation and the party bringing such action or proceeding have entered into a written agreement providing for any other forum or dispute resolution process, in which case such action or proceeding shall be subject to such written agreement, (vi) any action asserting a claim governed by the internal affairs doctrine or (vii) any action asserting one or more “internal corporate claims,” as that term is defined in subsection C of Section 13.1-624 of the Virginia Stock Corporation Act, in all cases to the fullest extent permitted by law and subject to one of the courts having personal jurisdiction over the indispensable parties named as defendants.

Any person or entity purchasing or otherwise acquiring or holding any interest in shares of capital stock of the Corporation shall be deemed to have notice of and consented to the provisions of this Article VI. If any action the subject matter of which is within the scope of this Article VI is filed in a court other than a court located within the Commonwealth of Virginia (a “Foreign Action”) by or in the name of any shareholder (including any beneficial owner), such shareholder shall be deemed to have consented to (i) the personal jurisdiction of the state and federal courts located within the Commonwealth of Virginia in connection with any action brought in any such court to enforce the provisions of this Article VI and (ii) having service of process made upon such shareholder in any such action by service upon such shareholder’s counsel in the Foreign Action as agent for such shareholder. Failure to enforce the provisions of this Article VI would cause the Corporation irreparable harm and the Corporation shall be entitled to equitable relief, including injunctive relief and specific performance to enforce the provisions of this Article VI.

If any provision of this Article VI shall be held to be invalid, illegal or unenforceable as applied to any person or entity or circumstance for any reason whatsoever, then, to the fullest extent permitted by law, the validity, legality and enforceability of such provision in any other circumstance and of the remaining provisions of Article VI (including, without limitation, each portion of any sentence of this Article VI containing any such provision held to be invalid, illegal or unenforceable that is not itself held to be invalid, illegal or unenforceable) and the application of such provision to other persons or entities or circumstances shall not in any way be affected or impaired thereby. The existence of any prior Alternative Forum Consent shall not act as a waiver of the Corporation’s ongoing consent right as set forth in this Article VI with respect to any current or future actions or proceedings. To the extent that the United States District Court for the Eastern District of Virginia, Alexandria Division, and the Circuit Court of the County of Fairfax, Virginia, do not have personal jurisdiction over the indispensable parties named as defendants, such parties must be given a reasonable opportunity to consent to such jurisdiction before any action or proceeding may be brought or maintained in any other court.

ARTICLE VII

SEVERABILITY

If any provision of these Bylaws shall be held to be invalid, illegal or unenforceable as applied to any person or entity or circumstance for any reason whatsoever, then, to the fullest extent permitted by law, the validity, legality and enforceability of such provision in any other circumstance and of the remaining provisions of these Bylaws (including, without limitation, each portion of any sentence of these Bylaws containing any such provision held to be invalid, illegal or unenforceable that is not itself held to be invalid, illegal or unenforceable) and the application of such provision to other persons or entities or circumstances shall not in any way be affected or impaired thereby.

ARTICLE VIII

MISCELLANEOUS PROVISIONS

Section 1.    Corporate Seal. The corporate seal of the Corporation shall be circular and shall have inscribed thereon, within and around the circumference, "MARKEL CORPORATION". In the center shall be the word "SEAL".

Section 2.    Fiscal Year. The fiscal year of the Corporation shall be determined in the discretion of the Board of Directors, but in the absence of any such determination it shall be the calendar year.

Section 3.    Amendments. Except as otherwise provided by law, these Bylaws may be amended or repealed, and new Bylaws may be made at any regular or special meeting of the Board of Directors. Bylaws made by the Board of Directors may be repealed or changed and new Bylaws may be made by the shareholders, and the shareholders may prescribe that any Bylaw made by them shall not be altered, amended or repealed by the Board of Directors.

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EX-4.1

EXHIBIT 4.1

DESCRIPTION OF THE REGISTRANT’S SECURITIES REGISTERED PURSUANT TO SECTION 12 OF THE SECURITIES EXCHANGE ACT OF 1934

As of February 19, 2021, Markel Corporation (the “Company,” “we,” “us” or “our”) had one class of securities registered under Section 12 of the Securities Exchange Act of 1934, as amended, our common shares, no par value.

DESCRIPTION OF COMMON SHARES

The following summary description of securities does not purport to be complete and is qualified in its entirety by reference to our articles of incorporation, our bylaws, and applicable provisions of the Virginia Stock Corporation Act.

Authorized Shares

Our authorized capital consists of 50,000,000 common shares, no par value, and 10,000,000 preferred shares, no par value.

Common Shares

Our common shares are listed on the New York Stock Exchange under the symbol “MKL.”

Each holder of our common shares is entitled to one vote for each share held of record on each matter submitted to a vote of shareholders. Cumulative voting in the election of directors is not permitted. As a result, the holders of more than 50% of the outstanding shares have the power to elect all directors. The quorum required at a shareholders’ meeting for consideration of any matter is a majority of the shares entitled to vote on that matter, represented in person or by proxy. If a quorum is present, the affirmative vote of a majority of the shares voting on the matter at the meeting generally is required for shareholder approval. However, approval is required by the affirmative vote of more than two-thirds of all shares entitled to vote, whether or not represented at the meeting, in the case of major corporate actions, such as:

•a merger,

•a share exchange,

•the dissolution of the Company,

•an amendment to our articles of incorporation, or

•the sale of all or substantially all of our assets.

These provisions, together with our ability to issue preferred shares with disproportionately high voting power could be used in, or have the effect of, preventing or deterring a party from gaining control of the Company, whether or not beneficial to public shareholders, and could discourage tactics that involve an actual or threatened change of control of the Company.

Subject to the rights of any holders of our preferred shares, the holders of common shares are entitled to receive dividends when, as, and if declared by the board of directors out of funds legally available for that purpose and, in the event of liquidation, dissolution or winding up of the Company, to share ratably in all assets remaining after the payment of liabilities. There are no preemptive or other subscription rights, conversion rights, or redemption or sinking fund provisions with respect to common shares. All common shares outstanding upon the consummation of any offering will be legally issued, fully paid and nonassessable.

Our transfer agent and registrar for common shares is American Stock Transfer & Trust Co., LLC.

Preferred Shares

Our preferred shares are issuable in one or more series from time to time at the direction of the board of directors. The board of directors is authorized, with respect to each series, to fix its:

•designation,

•relative rights, including voting, dividend, conversion, sinking fund and redemption rights,

•preferences, including with respect to dividends and on liquidation, and

•limitations.

The board of directors, without shareholder approval, can issue preferred shares with voting and conversion rights that could adversely affect the voting power of the holders of common shares. This right of issuance could be used as a method of preventing a party from gaining control of us. All preferred shares outstanding upon the consummation of any offering will be legally issued, fully paid and nonassessable.

In May 2020, we issued 600,000 6.00% Fixed-Rate Reset Non-Cumulative Series A preferred shares, with no par value and a liquidation preference of $1,000 per share. Certain terms of the Series A preferred shares are described below and the full terms of the Series A preferred shares are set forth in Article IVA of our articles of incorporation.

The Series A preferred shares are not convertible into, or exchangeable for, our common shares or any other class or series of shares or other securities of the Company. The Series A preferred shares have no stated maturity and are not subject to any sinking fund, retirement fund or purchase fund or other obligation of the Company to redeem, repurchase or retire the Series A preferred shares.

We have the option to redeem the Series A preferred shares: (a) in whole but not in part, at any time, within 90 days after the occurrence of a “rating agency event,” at $1,020 per Series A preferred share, plus accrued and unpaid dividends, (b) in whole but not in part, at any time, within 90 days after the occurrence of a “regulatory capital event” at $1,000 per Series A preferred share, plus accrued and unpaid dividends, or (c) in whole or in part, on June 1, 2025, or every fifth anniversary of that date, at $1,000 per Series A preferred share, plus accrued and unpaid dividends. A “rating agency event” means that any nationally recognized statistical rating organization that publishes a rating for the Company amends, clarifies or changes the criteria it uses to assign equity credit to securities like the Series A preferred shares, which results in shortening the length of time that the Series A preferred shares are assigned a particular level of equity credit or in the lowering of the equity credit assigned to the preferred shares. A “regulatory capital event” means that the Company becomes subject to capital adequacy supervision by a capital regulator and determines that, under such capital adequacy guidelines, the liquidation preference amount of the Series A preferred shares would not qualify as capital.

The Series A preferred shares rank senior to our common shares with respect to the payment of dividends and liquidation rights. Holders of the Series A preferred shares will be entitled to receive non-cumulative cash dividends, when, as and if declared by the board of directors, from the original issue date, semi-annually in arrears on the first day of June and December of each year. The Company accrues dividends when they are declared by the board of directors. To the extent declared, these dividends will accrue, on the liquidation preference of $1,000 per share, at a fixed annual rate of 6.00% from the original issue date to June 1, 2025. After June 1, 2025, the dividend rate will reset every five years and accrue at an annual rate equal to the five-year U.S. Treasury Rate as of two business days prior to the reset date, plus 5.662%. Dividends will not be cumulative and will not be mandatory. Accordingly, if dividends are not declared for any dividend period, then dividends for that that dividend period will cease to accrue and will not be payable. If any Series A preferred shares remain outstanding for any dividend period, unless the full dividends for the latest completed dividend period on all outstanding Series A preferred shares have been paid, we may not (i) declare or pay a dividend on our common shares or (ii) purchase, redeem or otherwise acquire for consideration any common shares, subject to certain exceptions.

Holders of the Series A preferred shares have no voting rights, except with respect to certain fundamental changes in the terms of the Series A preferred shares, in the case of certain dividend non-payments and as otherwise required by applicable law. If dividends on the Series A preferred shares are not declared and paid for three dividend periods, whether or not for consecutive dividend periods, holders of the outstanding Series A preferred shares will be entitled, subject to certain terms and limitations, to vote for the election of two additional directors.

Voting Rights with Respect to Extraordinary Corporate Transactions

Under Virginia law, a corporation may sell, lease, exchange or otherwise dispose of all, or substantially all, of its property, other than in the usual and regular course of business, if the proposed transaction is approved by more than two-thirds of all of the votes entitled to be cast on that matter. A merger or share exchange plan must be approved by each voting group entitled to vote separately on the plan by more than two-thirds of all the votes entitled to be cast on the plan by that voting group. The articles of incorporation may provide for a greater or lesser vote, but not less than a majority of all the votes cast on the transaction by each voting group entitled to vote on the transaction. Our articles of incorporation do not provide for a greater or lesser vote.

Anti-takeover Statutes

Virginia law, except as to companies that elect not to be covered, prohibits certain transactions between a Virginia corporation and any “interested shareholder,” including:

•mergers and statutory share exchanges;

•material dispositions of corporate assets not in the ordinary course of business;

•any dissolution of the corporation proposed by or on behalf of an interested shareholder; or

•any reclassification, including a reverse stock split, recapitalization or merger of the corporation with its subsidiaries that increases the percentage of voting shares beneficially owned by an interested shareholder by more than 5%.

An interested shareholder of a corporation is, among others, a person who is, or an affiliate or associate of the corporation who was within three years of the transaction, a beneficial owner of more than 10% of any class of the outstanding voting shares of the corporation unless a majority of disinterested directors approved the acquisition of shares making a person an interested shareholder. Unless the affiliated transaction comes within an applicable exemption, an affiliated transaction in the three years after a person becomes an interested shareholder must be approved by the affirmative vote of a majority of the disinterested directors and by the affirmative vote of the holders of two-thirds of the voting shares other than shares beneficially owned by the interested shareholder. After three years, an affiliated transaction must be approved by the affirmative vote of the holders of two-thirds of the voting shares other than shares beneficially owned by the interested shareholder, unless the affiliated transaction is approved by a majority of the disinterested directors or meets “fair price” criteria. We have not made any election in our articles of incorporation not to be covered by this provision of the Virginia law.

Under Virginia law, voting rights for “control shares” must be approved by a corporation’s shareholders, not including the shares held by interested parties. “Control shares” are shares whose acquisition entitles the acquiror to between 1/5 and 1/3, between 1/3 and 1/2, or greater than 1/2 of a corporation’s voting power. If a shareholder has acquired control shares with a majority of all voting power and these shares have been given voting rights, all other shareholders have dissenters’ rights. Virginia law exempts from these provisions acquisitions where the corporation is a party to the governing agreement. We have not made any election not to be governed by these provisions of Virginia law. Our board of directors can elect not to be governed by these provisions at any time before four days after receipt of a control share acquisition notice.

Insurance Holding Company Regulations on Change of Control

We are regulated as an insurance holding company and are subject to state and foreign laws that restrict the ability of any person to obtain control of an insurance holding company without prior regulatory approval. Without this approval or an exemption, no person may acquire, or seek to acquire, any voting security of an insurance holding company that controls an insurance subsidiary, or merge with the holding company if, as a result, the person would obtain control of the holding company. “Control” is generally defined as the direct or indirect power to direct or cause the direction of the management and policies of a person and is usually presumed to exist if a person directly or indirectly owns or controls 10% or more of the voting securities of another person.

Directors’ Duties

Under Virginia law, directors must discharge their duties in accordance with their good faith business judgment of the best interests of the corporation. Directors may rely on the advice or acts of others, including officers, employees, attorneys, accountants and board committees, if they have a good faith belief in their competence. Directors’ actions are not subject to a reasonable or prudent person standard. Virginia’s federal and state courts have focused on the process involved with directors’ decision-making and are generally supportive of directors if they have based their decision on an informed process. These elements of Virginia law could make it more difficult to take over a Virginia corporation than corporations in other states.

Advance Notice of Shareholder Business and Nominations

Our bylaws provide that shareholders seeking to make a proposal or nominate a director at an annual meeting of shareholders (other than a proposal or nomination of a director to be included in the Company’s proxy materials pursuant to our “proxy access” bylaw) must give notice in writing of the proposal or nomination to the Secretary of the Company, by registered or certified United States mail, at our principal executive offices, not earlier than the close of business on the 120th day and not later than the close of business on the 90th day prior to the first anniversary of the preceding year’s annual meeting, unless the date of the annual meeting is more than 30 days before or more than 60 days after such anniversary date, in which case notice must be given not earlier than the close of business on the 120th day prior to the date of such annual meeting and not later than the close of business on the later of the 90th day prior to the date of such annual meeting or the 10th day following the date on which the Company first publicly announces the date of such meeting, whichever is later. Our bylaws also specify certain requirements for the notice. These provisions may preclude shareholders from making a proposal or nominating a director at an annual meeting of shareholders.

Proxy Access for Board of Director Nominations

Our bylaws provide shareholders with “proxy access,” which permits a shareholder (or a group of up to 20 shareholders) holding at least 3% of our outstanding common shares continuously for at least three years to nominate and include director nominees (up to the greater of two individuals or 20% of the number of directors in office as of the last day on which notice of such nomination(s) may be given) in the Company’s proxy materials. Any eligible shareholder, or group of shareholders, wishing to nominate and include director nominees in the Company’s proxy materials must give notice in writing of the proposed nomination(s), along with certain nomination materials, to the Secretary of the Company, by registered or certified United States mail, at our principal executive offices, not later than the close of business on 120th day nor earlier than the close of business on the 150th day prior to the anniversary date of the immediately preceding mailing date for the notice of annual meeting of shareholders. Our bylaws also specify certain requirements for the notice, nominee(s) and accompanying nomination materials. These provisions may preclude certain shareholders from nominating director nominees, or certain director nominees from being properly nominated, in each case pursuant to our proxy access provisions.

EX-10.10(F)

EXHIBIT 10.10(f)

MARKEL CORPORATION

PERFORMANCE-BASED RESTRICTED STOCK UNIT

AWARD AGREEMENT

AWARDED TO XXXXX	AWARD DATE [ ]	VESTING SCHEDULE1
		VESTING DATE [ ]	PERCENTAGE OF UNITS 100%

MARKEL CORPORATION (the "Company") grants you (“you” or the “Participant”) the opportunity to receive restricted stock units ("Units"). The number of Units you may receive will be based on performance conditions as set forth in Exhibit A - Performance Criteria. Until the Vesting Date stated above, these Units are forfeitable and nontransferable, except as specifically provided in this Award Agreement. The Compensation Committee of the Company’s Board of Directors (the "Committee") or its authorized delegate will administer this Agreement and its decisions will be final. Any capitalized terms not defined in this Award Agreement will have the meanings provided in the Markel Corporation 2016 Equity Incentive Compensation Plan (the “Plan”).

The terms of the award are:

1.    Performance Conditions: The performance conditions for your award are set forth in Exhibit A. Your award potential is expressed as a percentage of your eligible salary. On the date the Committee certifies the completion of the Performance Criteria in Exhibit A (the “Determination Date”), the Committee will also determine the dollar equivalent of your Units. The number of Units you will receive is determined by dividing the dollar equivalent by the Fair Market Value of a share of Company Stock on the Determination Date. You will not be awarded any Units if your employment ends prior to the Determination Date.

2.    Vesting For Units. If you remain employed through the Vesting Date, the Units will become vested and non-forfeitable. For each vested Unit, the Company will issue you a share of Company Stock. These shares of Company Stock will be issued on or as soon as administratively practicable but no later than 90 days after either:

a.    the Vesting Date, or

b.    such later date as may be elected by you pursuant to a valid deferral election in accordance with procedures determined by the Company.

3.    Forfeiture of Units. In general, if you separate from service before the Vesting Date, any unvested Units will be forfeited. Under the circumstances set forth below (subject to the other terms of this Award Agreement, including Section 6), Units will vest or be forfeited, in whole or part, upon separation from service before the Vesting Date as follows:

(a)    Death or Disability. If you separate from service due to death or Disability, then the unvested Units will become fully vested and non-forfeitable, and shares will be issued on the date on which your death or Disability occurs or as soon as administratively practicable (but in any event no later than 90 days) thereafter.

(b)    55/5. If you separate from service for any reason (other than due to death, Disability or termination for Cause) after turning 55 years old and, at the time of separation, you have at least 5 consecutive years of service with the Company or its Subsidiaries since your most recent hire date, then the unvested Units will become fully vested and non-forfeitable, and shares will be issued on the date on which your

1 If necessary or appropriate to ensure orderly administration of the Company’s payroll and tax reporting obligations, the Company may accelerate vesting and payment of restricted stock units up to a maximum of thirty days before the date on which such restricted stock units would otherwise have vested and been paid.

separation occurs or as soon as administratively practicable (but in any event no later than 90 days) thereafter, subject to Section 4 (Specified Employee) below.

(c)    Military Service. If you separate from service due to military service or are absent from work due to an approved military leave, then the number of Units set forth in this Award will be vested on a pro rata basis based on a fraction of the number of whole months from January 1 of the calendar year following the calendar year in which the Award Date occurs until the date of separation/leave commencement divided by 36, and shares will be issued on the earlier of (i) the otherwise applicable Vesting Date or (ii) the date on which your separation occurs or as soon as administratively practicable (but in any event no later than 90 days) thereafter, subject to Section 4 below. Any remaining unvested Units will be forfeited as of the date of separation/leave commencement; except that a Participant who separates from service due to military service or who is absent from work due to approved military leave, and who returns to active employment with the Company upon cessation of such military service before the otherwise applicable Vesting Date will vest in any remaining unvested Units if employed on the Vesting Date.

(d)    Involuntary Termination; Redundancy. If you separate from service due to involuntary termination other than for Cause, then the unvested Units will become fully vested and non-forfeitable, and shares will be issued on the date on which your separation from service occurs (or as soon as administratively practicable (but in any event no later than 90 days) thereafter, subject to Section 4 below.

(e)    Change in Control. If you separate from service within 12 months after a Change in Control due to Involuntary Termination, then the unvested Units will become fully vested and non-forfeitable, and shares will be issued on the date on which your separation from service occurs (or as soon as administratively practicable (but in any event no later than 90 days) thereafter, subject to Section 4 below. For this purpose, Involuntary Termination means your employment is involuntarily terminated without Cause or you terminate your employment for Good Reason, in each case as defined in the Plan.

If you have elected to defer the receipt of shares for your vested Units pursuant to a valid deferral election and you separate from service (whether before or after the Vesting Date) for any reason other than death or Disability, then shares will be issued for your vested Units, including any Units which become vested as a result of your separation, as soon as administratively practicable (but in any event no later than 90 days) after the date on which you have elected to receive the shares, notwithstanding the above.

4.    Six Month Delay for Specified Employees. If you separate from service before the Vesting Date as set forth in Section 3 above, other than due to death or Disability, and if you are a “specified employee” (as defined in Section 409A(a)(2)(B)(i) of the Code and the generally applicable Internal Revenue Service guidance thereunder) on the date of your separation, then, notwithstanding anything in Section 3 to the contrary, no shares will be issued for your Units until the date that is six months after the date of your separation (or until the date of your death, if earlier). Any shares which you would otherwise have been entitled to receive during the first six months following the date of your separation will be issued instead on the date which is six months after the date of your separation (or on the date of your death, if earlier). Whether you are a “specified employee” will be determined under guidelines established by the Company for this purpose.

5.    “Separation from Service” Defined. References throughout this Agreement to the Participant’s “separation from service” and variations thereof will have the meaning set forth in Section 1.409A-1(h) of the Treasury Regulations, as amended from time to time, applying the default terms thereof.

6.    Forfeiture and Restitution. If during the period of the Participant’s employment and two years thereafter, the Company’s Co-Chief Executive Officers, or either of them, with respect to any Participant other than to any employee who is an executive officer of the Company for purposes of Section 16 of the Securities Exchange Act of 1934 (including themselves) or the Committee (with respect to a Section 16 Officer) determines, in their or its sole and complete discretion, that the Participant has engaged in any the following, then they or it may either: (a) cancel this Award without any payment, and/or (b) require the Participant to repay the gross amount of any payment received under this Award within the previous two years, by delivery of a number of shares equal to the number of Units awarded (or the Fair Market Value thereof in cash):

a.    the Participant has become associated with, recruited or solicited customers or other employees of the Company or its Subsidiaries for, or has become employed by, rendered services to, or acquired any interest in (other than any non-substantial interest) any business that is in competition with the Company or its Subsidiaries,

b.    the Participant’s employment has been terminated for Cause,

c.    the Participant has disclosed the terms of this Agreement to any person other than, on a confidential basis, their spouse, attorneys, accountants or financial advisors or in response to a court order, or

d.    the Participant has engaged in conduct detrimental to the interests of the Company or its Subsidiaries.

In addition, this Award shall be subject to any recoupment or clawback policy that is adopted by, or applicable to, the Company, pursuant to any requirement of law or any exchange listing requirement related to clawback or other recovery of incentive compensation. The provisions of this Section 6 are material consideration for this Award, which would not have been granted had Participant not agreed to them. If a Participant fails to repay in full any amount subject to repayment under this Section 6 within thirty (30) days following a demand from the Company, the Company may enforce the terms of this Section 6 by obtaining a court order against the Participant for the return of such amount, and the Participant consents to jurisdiction in the courts set forth in Section 11 for purposes of obtaining such an order. The Company may also offset any amount it otherwise owes to the Participant to collect any amount due under this Section 6. The remedies outlined in this Section 6 are without limitation as to any other remedies the Company may pursue against the Participant at law or in equity.

7.    Transfer Restrictions. The Participant’s rights to the Units are not subject to sale, assignment, transfer, pledge, or encumbrance.

8.    Tax Withholding. Unless alternative arrangements satisfactory to the Company are made, the Company will withhold from the payment for the vested Units shares with a Fair Market Value equal to the minimum amount of any foreign, federal, state, or local income, employment or other taxes imposed on the payment required to be withheld by law. The Fair Market Value will be determined on the Vesting Date.

9.    Binding Effect. Subject to the limitations stated above, this Agreement will be binding upon and inure to the benefit of the Participant's legatees, distributees, and personal representatives and the successors of the Company.

10.    Change in Capital Structure. The Units will be adjusted as the Committee determines is equitably required in the event of a dividend in the form of stock, spin-off, stock split-up, subdivision or consolidation of shares of Company Stock or other similar changes in capitalization.

11.    Interpretation. This Agreement will be construed under and be governed by the laws of the Commonwealth of Virginia. THE UNITED STATES DISTRICT COURT FOR THE EASTERN DISTRICT OF VIRGINIA OR THE CIRCUIT COURT FOR THE COUNTY OF HENRICO WILL HAVE EXCLUSIVE JURISDICTION OVER ANY DISPUTES ARISING OUT OF OR RELATED TO THE PLAN OR THIS AGREEMENT.

12.    Code Section 409A. This Agreement is intended to comply with the applicable requirements of Sections 409A(a)(2) through (4) of the Code, and will be interpreted to the extent context reasonably permits in accordance with this intent. The parties agree to modify this Agreement or the timing (but not the amount) of any payment to the extent necessary to comply with Section 409A of the Code and avoid application of any taxes, penalties, or interest thereunder. However, in the event that any amounts payable under this Agreement are subject to any taxes, penalties or interest under Section 409A of the Code or otherwise, the Participant will be solely liable for the payment thereof.

13.    Acceptance. By accepting any Units or benefits under this Agreement, Participant is accepting all the provisions hereof, including without limitation Section 6 hereof.

IN WITNESS WHEREOF, the Company has caused this Agreement to be signed as of the award date shown above.

MARKEL CORPORATION

By:

EX-10.10(G)

EXHIBIT 10.10(g)

MARKEL CORPORATION

RESTRICTED STOCK UNIT

AWARD AGREEMENT

AWARDED TO XXXXX	AWARD DATE XXXXXX	VESTING SCHEDULE1
		VESTING DATE XXXXX	PERCENTAGE OF UNITS 100%

MARKEL CORPORATION (the "Company") grants you (“you” or the “Participant”) XX restricted stock units ("Units"). Until the Vesting Date stated above, these Units are forfeitable and nontransferable, except as specifically provided in this Award Agreement. The Compensation Committee of the Company’s Board of Directors (the "Committee") or its authorized delegate will administer this Agreement and its decisions will be final. Any capitalized terms not defined in this Award Agreement will have the meanings provided in the Markel Corporation 2016 Equity Incentive Compensation Plan (the “Plan”).

The terms of the award are:

1.    Vesting For Units. If you remain employed through the Vesting Date, the Units will become vested and non-forfeitable. For each vested Unit, the Company will issue you a share of Company Stock. These shares of Company Stock will be issued on or as soon as administratively practicable but no later than 90 days after either:

a.    the Vesting Date, or

b.    such later date as may be elected by you pursuant to a valid deferral election in accordance with procedures determined by the Company.

2.    Forfeiture of Units. In general, if you separate from service before the Vesting Date, any unvested Units will be forfeited. Under the circumstances set forth below (subject to the other terms of this Award Agreement, including Section 5), Units will vest or be forfeited, in whole or part, upon separation from service before the Vesting Date as follows:

(a)    Death or Disability. If you separate from service due to death or Disability, then the unvested Units will become fully vested and non-forfeitable, and shares will be issued on the date on which your death or Disability occurs or as soon as administratively practicable (but in any event no later than 90 days) thereafter.

(b)    Involuntary Termination; Redundancy. If you separate from service due to involuntary termination other than for Cause, then the unvested Units will become fully vested and non-forfeitable, and shares will be issued on the date on which your separation from service occurs (or as soon as administratively practicable (but in any event no later than 90 days) thereafter, subject to Section 3 below.

(c)    Change in Control. If you separate from service within 12 months after a Change in Control due to Involuntary Termination, then the unvested Units will become fully vested and non-forfeitable, and shares will be issued on the date on which your separation from service occurs (or as soon as administratively practicable (but in any event no later than 90 days) thereafter, subject to Section 3 below. For this purpose, Involuntary Termination means you’re your employment is involuntarily terminated without Cause or you terminate your employment for Good Reason, in each case as defined in the Plan.

1 If necessary or appropriate to ensure orderly administration of the Company’s payroll and tax reporting obligations, the Company may accelerate vesting and payment of restricted stock units up to a maximum of thirty days before the date on which such restricted stock units would otherwise have vested and been paid.

If you have elected to defer the receipt of shares for your vested Units pursuant to a valid deferral election and you separate from service (whether before or after the Vesting Date) for any reason other than death or Disability, then shares will be issued for your vested Units, including any Units which have become vested as a result of such separation, as soon as administratively practicable (but in any event no later than 90 days) after the date on which you have elected to receive the shares, notwithstanding the above.

3.    Six Month Delay for Specified Employees. If you separate from service before the Vesting Date as set forth in Section 2 above, other than due to death or Disability, and if you are a “specified employee” (as defined in Section 409A(a)(2)(B)(i) of the Code and the generally applicable Internal Revenue Service guidance thereunder) on the date of your separation, then, notwithstanding anything in Section 2 to the contrary, no shares will be issued for your Units until the date that is six months after the date of your separation (or until the date of your death, if earlier). Any shares which you would otherwise have been entitled to receive during the first six months following the date of your separation will be issued instead on the date which is six months after the date of your separation (or on the date of your death, if earlier). Whether you are a “specified employee” will be determined under guidelines established by the Company for this purpose.

4.    Separation from Service Defined. References throughout this Agreement to the Participant’s “separation from service” and variations thereof will have the meaning set forth in Section 1.409A-1(h) of the Treasury Regulations, as amended from time to time, applying the default terms thereof.

5.    Forfeiture and Restitution. If during the period of the Participant’s employment and two years thereafter, the Company’s Co-Chief Executive Officers, or either of them, with respect to any Participant other than to any employee who is an executive officer of the Company for purposes of Section 16 of the Securities Exchange Act of 1934 (including themselves) or the Committee (with respect to a Section 16 Officer) determines, in their or its sole and complete discretion, that the Participant has engaged in any the following, then they or it may either: (a) cancel this Award without any payment, and/or (b) require the Participant to repay the gross amount of any payment received under this Award within the previous two years, by delivery of a number of shares equal to the number of Units awarded (or the Fair Market Value thereof in cash):

a.    the Participant has become associated with, recruited or solicited customers or other employees of the Company or its Subsidiaries for, or has become employed by, rendered services to, or acquired any interest in (other than any non-substantial interest) any business that is in competition with the Company or its Subsidiaries,

b.    the Participant’s employment has been terminated for Cause,

c.    the Participant has disclosed the terms of this Agreement to any person other than, on a confidential basis, their spouse, attorneys, accountants or financial advisors or in response to a court order, or

d.    the Participant has engaged in conduct detrimental to the interests of the Company or its Subsidiaries.

In addition, this Award shall be subject to any recoupment or clawback policy that is adopted by, or applicable to, the Company, pursuant to any requirement of law or any exchange listing requirement related to clawback or other recovery of incentive compensation. The provisions of this Section 5 are material consideration for this Award, which would not have been granted had Participant not agreed to them. If a Participant fails to repay in full any amount subject to repayment under this Section 5 within thirty (30) days following a demand from the Company, the Company may enforce the terms of this Section 5 by obtaining a court order against the Participant for the return of such amount, and the Participant consents to jurisdiction in the courts set forth in Section 10 for purposes of obtaining such an order. The Company may also offset any amount it otherwise owes to the Participant to collect any amount due under this Section 5. The remedies outlined in this Section 5 are without limitation as to any other remedies the Company may pursue against the Participant at law or in equity.

6.    Transfer Restrictions. The Participant’s rights to the Units are not subject to sale, assignment, transfer, pledge, or encumbrance.

7.    Tax Withholding. Unless alternative arrangements satisfactory to the Company are made, the Company will withhold from the payment for the vested Units shares with a Fair Market Value equal to the minimum amount of any foreign, federal, state, or local income, employment or other taxes imposed on the payment required to be withheld by law. The Fair Market Value will be determined on the Vesting Date.

8.    Binding Effect. Subject to the limitations stated above, this Agreement will be binding upon and inure to the benefit of the Participant's legatees, distributees, and personal representatives and the successors of the Company.

9.    Change in Capital Structure. The Units will be adjusted as the Committee determines is equitably required in the event of a dividend in the form of stock, spin-off, stock split-up, subdivision or consolidation of shares of Company Stock or other similar changes in capitalization.

10.    Interpretation. This Agreement will be construed under and be governed by the laws of the Commonwealth of Virginia. THE UNITED STATES DISTRICT COURT FOR THE EASTERN DISTRICT OF VIRGINIA OR THE CIRCUIT COURT FOR THE COUNTY OF HENRICO WILL HAVE EXCLUSIVE JURISDICTION OVER ANY DISPUTES ARISING OUT OF OR RELATED TO THE PLAN OR THIS AGREEMENT.

11.    Code Section 409A. This Agreement is intended to comply with the applicable requirements of Sections 409A(a)(2) through (4) of the Code, and will be interpreted to the extent context reasonably permits in accordance with this intent. The parties agree to modify this Agreement or the timing (but not the amount) of any payment to the extent necessary to comply with Section 409A of the Code and avoid application of any taxes, penalties, or interest thereunder. However, in the event that any amounts payable under this Agreement are subject to any taxes, penalties or interest under Section 409A of the Code or otherwise, the Participant will be solely liable for the payment thereof.

12.    Acceptance. By accepting any Units or benefits under this Agreement, Participant is accepting all the provisions hereof, including without limitation Section 5 hereof.

IN WITNESS WHEREOF, the Company has caused this Agreement to be signed as of the award date shown above.

MARKEL CORPORATION

By:

EX-10.10(H)

EXHIBIT 10.10(h)

MARKEL CORPORATION

DEFERRAL ELECTION

FOR [YEAR] RESTRICTED STOCK UNIT AWARDS

You may be selected by the Compensation Committee of the Markel Corporation Board of Directors (the “Committee") to receive a restricted stock unit (“RSU”) award in [YEAR]. There are two different types of RSU awards that you may be selected to receive: a time-based or “retention” RSU award (which vests based solely on your continued service and the passage of time) or a performance-based RSU award (which vests based both on your continued service and the achievement of certain performance goals). You may elect to defer payment of all or a portion of any RSU award you receive in [YEAR] by completing and returning the enclosed deferral election by the due date set forth below. You may make separate deferral elections for time-based and performance-based RSU awards.

Performance-based RSU awards are expected to be granted in the first quarter of [YEAR]. The awards typically consist of a cash dollar value which, if the applicable performance goals are achieved, will be converted into a number of RSUs in early [YEAR] based on the fair market value of Markel common stock at that time. The RSUs typically cliff vest and, unless deferred, will be paid in shares of Markel common stock on or about December 31, [YEAR], subject to your continued employment and the other terms and conditions of the award. Pursuant to the enclosed Deferral Election, you may elect to defer payment of all or a portion of any vested RSUs resulting from any performance-based RSU award you receive in [YEAR] until a specific date or until you reach a specific age, either of which must be after December 31, [YEAR], or the applicable vesting date. If you elect to defer your vested RSUs until a specific age or date, you will not receive payment for the RSUs until such age or date, even if you separate from service from Markel in the meantime (unless your separation is due to death or Disability).

Time-based RSU awards are not granted in regular annual cycles and are instead used to address specific retention needs identified by the Committee. Time-based RSUs typically vest over three years after the grant date, either on a cliff or graded annual basis as determined by the Committee. Pursuant to the enclosed Deferral Election, you may elect to defer payment of all or a portion of any vested time-based RSU award you receive in [YEAR] until a specific date or until you reach a specific age, either of which must be after the applicable vesting date.

You will be taxed at ordinary income rates on the value of any Markel common stock that you receive with respect to any vested RSUs at the time of payment. You may sell the shares at that time, subject to any securities law restrictions, or have Markel withhold an appropriate number of shares to satisfy the tax obligation.

The Committee selects RSU award recipients and determines the terms of RSU awards, whether time-based or performance-based, in its sole discretion. The fact that you have been given the opportunity to make a deferral election does not entitle you to receive any RSU award or guarantee that you will vest in any RSUs that may be awarded. The terms of any RSU award you receive may differ from the terms described above. Any RSU award you may receive will be subject to all terms and conditions of the applicable plan document and your individual award agreement, which will control over any contrary provisions hereof.

There are advantages and disadvantages to making a deferral election. You should consider your particular tax and financial situation before deciding to do so and are encouraged to consult your tax or financial planning advisor in making a decision. Note that deferral elections, once made, are irrevocable. You will not have another opportunity to defer payment of any RSU award you receive in [YEAR] after the due date set forth below.

For a Deferral Election to be effective you must complete and return the attached form by December [XX], [YEAR].

MARKEL CORPORATION

DEFERRAL ELECTION

FOR [YEAR] RESTRICTED STOCK UNIT AWARDS

Name: _______________________________________

Complete the information below if you wish to defer payment of any vested RSU award you receive in [YEAR]. You may make separate elections for time-based and performance-based RSU awards. Payment of vested RSUs is made in a single lump sum in shares of common stock of Markel Corporation (“Shares”), less any withholding or other applicable taxes.

THIS DEFERRAL ELECTION MUST BE COMPLETED AND RECEIVED BY THE COMMITTEE OR A DESIGNEE NO LATER THAN DECEMBER [16], [YEAR] TO BE EFFECTIVE FOR THE [YEAR] PLAN YEAR.

1.    Deferral Election For Performance-Based RSU Awards

You may elect to defer payment of any performance-based RSU award you receive in [YEAR] (under which RSUs will typically be issued in early [YEAR]). Note that this election only applies to any RSUs resulting from a [YEAR] performance-based RSU award, including any discretionary RSUs awarded in connection with such award, and not to any retention or other time-based restricted stock units awarded during [YEAR].

To defer any [YEAR] performance-based RSU award select one of the following:

[ ]    I hereby elect to defer payment of any Shares payable under any performance-based RSU award I receive in [YEAR], including any discretionary RSUs awarded in connection with such award. I wish to receive payment of any Shares deferred hereunder at the following time(s) [indicate one or more times below; total of all percentages you enter must equal 100%]:

[ ]    I wish to receive payment of ________ percent of the Shares deferred hereunder upon my attainment of age (the date you attain this age must be later than December 31, [YEAR]): _________. [You may add additional percentages and ages below if you wish.]

[ ]    I wish to receive payment of _________ percent of the Shares deferred hereunder upon the following calendar date (date must be later than December 31, [YEAR]): ______________________. [You may add additional percentages and calendar dates below if you wish.]

Note that if you should separate from service from Markel (other than due to your death or becoming Disabled as defined in your Award Agreement) prior to the date(s) or age(s) you have elected above, your RSUs will remain deferred and will not be paid until the date(s) or age(s) you have elected. If you should die or become Disabled (as defined in your award agreement) prior to the date(s) or age(s) you have elected above, then all of your remaining vested, unpaid RSUs will be paid on or within 90 days after the date of your death or Disability.

2.    Deferral Election For Time-Based RSU Awards

You may elect to defer payment of any time-based RSU award you receive in [YEAR]. Note that this election only applies to any time-based RSU award you may receive in [YEAR], not to any performance-based RSU award you may receive in [YEAR], including any discretionary RSUs awarded in connection with such award.

To defer any [YEAR] time-based RSU award select only one of the following:

[ ]    I wish to make the same deferral election(s) with respect to any time-based RSU award I receive in [YEAR] as I have made in Section 1 above with respect to any [YEAR] performance-based RSU I receive.

[ ]    I hereby elect to defer payment of any Shares payable under any time-based RSU award I receive in [YEAR]. I wish to receive payment of any Shares deferred hereunder at the following time(s) [indicate one or more times below; total of all percentages you enter must equal 100%]:

[ ]    I wish to receive payment of ________ percent of the Shares deferred hereunder upon my attainment of age (the date you attain this age must be later than the applicable vesting date which in all likelihood will be no later than three years from the award date or December 31, [YEAR]): _________. [You may add additional percentages and ages below if you wish.]

[ ]    I wish to receive payment of _________ percent of the Shares deferred hereunder upon the following calendar date (date must be later than the applicable vesting date which in all likelihood will be no later than three years from the award date or December 31, [YEAR]): ______________________. [You may add additional percentages and calendar dates below if you wish.]

Note that if you should separate from service from Markel (other than due to your death or becoming Disabled as defined in your Award Agreement) prior to the date(s) or age(s) you have elected above, your RSUs will remain deferred and will not be paid until the date(s) or age(s) you have elected. If you should die or become Disabled (as defined in your award agreement) prior to the date(s) or age(s) you have elected above, then all of your remaining vested, unpaid RSUs will be paid on or within 90 days after the date of your death or Disability.

Note if the vesting date is later than the date or age selected then such deferral election will be void and the RSUs will vest in accordance with the terms of the award agreement.

Your deferred RSUs will remain subject to all other terms and conditions of the applicable plan document and your individual award agreement. Note that payment of any Shares otherwise payable upon your separation from service with Markel Corporation may be required to be delayed for an additional six months in order to comply with Section 409A of the Internal Revenue Code.

I understand that I am making the elections contained herein in accordance with the terms of the applicable plan document and that the terms of the plan and my award agreement will be used to resolve any ambiguity or inconsistency that should arise in connection with the making of these elections.

Participant’s Signature Date

EX-21

Exhibit 21

CERTAIN SUBSIDIARIES OF MARKEL CORPORATION

Subsidiary	State or Other Jurisdiction of Incorporation or Organization
Alterra Capital Holdings Limited	Bermuda
Lodgepine Capital Management Limited	Bermuda
Markel Bermuda Limited	Bermuda
Markel CATCo Investment Management Ltd.	Bermuda
Markel CATCo Re Ltd.	Bermuda
Markel CATCo Reinsurance Fund Ltd.	Bermuda
Black/White & Associates Insurance Brokers	California
Essentia Insurance Company	Missouri
Evanston Insurance Company	Illinois
Markel American Insurance Company	Virginia
Markel Aspen, Inc.	Delaware
FirstComp Insurance Company	Nebraska
Markel Holdings GmbH	Germany
Markel Insurance S.E.	Germany
Markel India Investments, Inc.	Virginia
Markel Insurance Company	Illinois
Markel Global Reinsurance Company	Delaware
Markel International Holdings (Delaware) Limited	Delaware
Caunce O'Hara & Company Limited	England
FSB Insurance Service Limited	England
Galleon Marine Insurance Agency Limited	England
Markel Capital Limited	England
Markel Consultancy Services Limited	England
Markel International (Dubai) Limited	Dubai/UAE
Markel International Hong Kong Limited	Hong Kong
Markel International Insurance Company Limited	England
Markel International Labuan Limited	Malaysia
Markel International Singapore Pte. Limited	Singapore
Markel Law LLP	England
Markel Protection Limited	England
Markel Services India Private Limited	India
Markel Syndicate Management Limited	England
Markel Service, Incorporated	Virginia
Markel Surety Holding Corporation	Delaware
SureTec Insurance Company	Texas
Surety International SPC	Cayman Islands
Markel Ventures, Inc.	Virginia
Brahmin Leather Works, LLC	Delaware
Buckner Heavylift Cranes, LLC	North Carolina
CapTech Ventures, Inc.	Virginia
Costa Farms Holdings, LLC	Florida
Cottrell, Inc.	Georgia
Eagle Construction of Va., LLC	Virginia
Ellicott Dredge Enterprises, LLC	Maryland

Havco WP LLC	Delaware
Lansing Building Products, LLC	Virginia
Markel Eagle Investment, LLC	Virginia
Markel Eagle Investment II, LLC	Virginia
Markel Food Group, Inc.	Virginia
Metromont, LLC	South Carolina
Panel Specialists, Inc.	Texas
ParkLand Ventures, Inc.	Virginia
PartnerMD, LLC	Virginia
Retail Data, LLC	Virginia
Rosemont Investment Group, LLC	Delaware
VSC Fire & Security, Inc.	Virginia
Weldship LLC	Pennsylvania
Markel West, Inc.	California
MINT Canadian Specialty Underwriters Limited	Canada
Markel Canada Limited	Canada
MKL Services Company	Virginia
Nephila Advisors LLC	Delaware
Nephila Holdings Ltd.	Bermuda
Nautical Management Ltd.	Bermuda
Nephila Capital Ltd.	Bermuda
Nephila Syndicate Management Limited	England
Rubik Reinsurance Ltd.	Bermuda
Prairie State Administrative Services, Inc.	Illinois
State National Companies, Inc.	Delaware
City National Insurance Company	Texas
Independent Specialty Insurance Company	Delaware
National Specialty Insurance Company	Texas
Pinnacle National Insurance Company	Texas
State National Insurance Company, Inc.	Texas
Superior Specialty Insurance Company	Delaware
T.B.A. Insurance Group, Ltd.	Texas
United Specialty Insurance Company	Delaware

EX-23

Exhibit 23

Consent of Independent Registered Public Accounting Firm

We consent to the incorporation by reference in the registration statements No. 333-253330 on Form S-3 and No. 333-107661, No. 333-178051, No. 333-181419, No. 333-211415, No. 333-239331, and No. 333-253317 on Form S-8 of our reports dated February 17, 2023, with respect to the consolidated financial statements of Markel Corporation and the effectiveness of internal control over financial reporting.

/s/ KPMG LLP

Richmond, Virginia

February 17, 2023

EX-31.1

Exhibit 31.1

CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER

PURSUANT TO RULE 13a-14(a)/15d-14(a)

I, Thomas S. Gayner, certify that:

1.I have reviewed this annual report on Form 10-K of Markel Corporation;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant's other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a)Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b)Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c)Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d)Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5.The registrant's other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

a)All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

b)Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

February 17, 2023	/s/ Thomas S. Gayner
	Thomas S. Gayner
	Chief Executive Officer
	(Principal Executive Officer)

EX-31.2

Exhibit 31.2

CERTIFICATION OF PRINCIPAL FINANCIAL OFFICER

PURSUANT TO RULE 13a-14(a)/15d-14(a)

I, Brian J. Costanzo, certify that:

1.I have reviewed this annual report on Form 10-K of Markel Corporation;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant's other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a)Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b)Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c)Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d)Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5.The registrant's other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

a)All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

b)Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

February 17, 2023	/s/ Brian J. Costanzo
	Brian J. Costanzo
	Senior Vice President, Finance, Chief Accounting Officer and Controller
	(Principal Financial Officer)

EX-32.1

Exhibit 32.1

CERTIFICATION

FURNISHED PURSUANT TO 18 U.S.C. SECTION 1350

In connection with the Annual Report of Markel Corporation (the "Company") on Form 10-K for the year ended December 31, 2022 as filed with the Securities and Exchange Commission on the date hereof (the "Report"), each of the undersigned certifies pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to his knowledge:

1.The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

2.The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

February 17, 2023	/s/ Thomas S. Gayner
	Thomas S. Gayner
	Chief Executive Officer
	(Principal Executive Officer)
	/s/ Brian J. Costanzo
	Brian J. Costanzo
	Senior Vice President, Finance, Chief Accounting Officer and Controller
	(Principal Financial Officer)

XML

Document And Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2022	Feb. 01, 2023	Jun. 30, 2021
Cover [Abstract]
Document Type	10-K
Document Period End Date	Dec. 31, 2022
Entity File Number	001-15811
Entity Registrant Name	MARKEL CORPORATION
Entity Incorporation, State or Country Code	VA
Entity Tax Identification Number	54-1959284
Entity Address, Address Line One	4521 Highwoods Parkway
Entity Address, City or Town	Glen Allen
Entity Address, State or Province	VA
Entity Address, Postal Zip Code	23060-6148
City Area Code	804
Local Phone Number	747-0136
Title of 12(b) Security	Common Stock, no par value
Trading Symbol	MKL
Security Exchange Name	NYSE
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Entity Shell Company	false
Entity Public Float			$ 17,203,000,000
Entity Common Stock, Shares Outstanding		13,408,610
Document Annual Report	true
Document Transition Report	false
Amendment Flag	false
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	FY
Entity Central Index Key	0001096343
Current Fiscal Year End Date	--12-31
Auditor Name	KPMG LLP
Auditor Location	Richmond, VA
Auditor Firm ID	185

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Consolidated Balance Sheets - USD ($) $ in Thousands		Dec. 31, 2022	Dec. 31, 2021
ASSETS
Fixed maturity securities, available-for-sale (amortized cost of $12,805,887 in 2022 and $12,061,467 in 2021)		$ 11,856,835	$ 12,587,305
Equity securities (cost of $3,100,040 in 2022 and $2,867,899 in 2021)		7,671,912	9,023,927
Short-term investments, available-for-sale (estimated fair value approximates cost)		2,669,262	1,799,988
Total Investments		22,198,009	23,411,220
Cash and cash equivalents		4,137,432	3,978,490
Restricted cash and cash equivalents		1,084,081	902,457
Receivables		2,961,056	2,413,938
Reinsurance recoverables		8,446,745	7,293,555
Deferred policy acquisition costs		925,483	794,145
Prepaid reinsurance premiums		2,066,114	1,798,571
Goodwill	[1]	2,638,838	2,899,140
Intangible assets		1,747,464	1,822,486
Other assets		3,586,037	3,163,094
Total Assets		49,791,259	48,477,096
LIABILITIES AND EQUITY
Unpaid losses and loss adjustment expenses		20,947,898	18,178,894
Life and annuity benefits		759,025	902,980
Unearned premiums		6,220,748	5,383,619
Payables to insurance and reinsurance companies		669,742	616,665
Senior long-term debt and other debt (estimated fair value of $3,541,000 in 2022 and $5,017,000 in 2021)		4,103,629	4,361,266
Other liabilities		3,438,738	3,832,084
Total Liabilities		36,139,780	33,275,508
Redeemable noncontrolling interests		523,154	461,378
Commitments and contingencies
Shareholders' equity:
Preferred stock		591,891	591,891
Common stock		3,493,893	3,441,079
Retained earnings		9,836,827	10,446,763
Accumulated other comprehensive income (loss)		(857,077)	237,617
Total Shareholders' Equity		13,065,534	14,717,350
Noncontrolling interests		62,791	22,860
Total Equity		13,128,325	14,740,210
Total Liabilities and Equity		$ 49,791,259	$ 48,477,096

[1] As of December 31, 2022, goodwill was net of accumulated impairment losses of $190.6 million, of which $171.9 million was in Other and $18.7 million was in Markel Ventures. As of December 31, 2021, goodwill was net of accumulated impairment losses of $110.6 million, of which $91.9 million was in Other and $18.7 million was in Markel Ventures.

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Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Statement of Financial Position [Abstract]
Fixed maturity securities, available-for-sale (amortized cost of $12,805,887 in 2022 and $12,061,467 in 2021)	$ 12,805,887	$ 12,061,467
Equity securities (cost of $3,100,040 in 2022 and $2,867,899 in 2021)	3,100,040	2,867,899
Senior long-term debt and other debt (estimated fair value of $3,541,000 in 2022 and $5,017,000 in 2021)	$ 3,541,000	$ 5,017,000

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Consolidated Statements Of Income (Loss) And Comprehensive Income (Loss) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2022		Dec. 31, 2021		Dec. 31, 2020
OPERATING REVENUES
Earned premiums		$ 7,587,792		$ 6,503,029		$ 5,612,205
Net investment income		446,755		367,417		375,826
Net investment gains (losses)		(1,595,733)		1,978,534		617,979
Products revenues		2,427,096		1,712,120		1,439,515
Services and other revenues		2,809,425		2,285,325		1,689,541
Total Operating Revenues		11,675,335		12,846,425		9,735,066
OPERATING EXPENSES
Losses and loss adjustment expenses		4,445,589		3,581,205		3,466,961
Underwriting, acquisition and insurance expenses		2,515,583		2,293,739		2,017,627
Products expenses		2,241,736		1,544,506		1,256,159
Services and other expenses		2,306,635		2,022,935		1,561,120
Amortization of intangible assets		178,778	[1]	160,539	[2]	159,315	[3]
Impairment of goodwill		80,000		0		0
Total Operating Expenses		11,768,321		9,602,924		8,461,182
Operating Income (Loss)		(92,986)		3,243,501		1,273,884
Interest expense		(196,062)		(183,579)		(177,582)
Net foreign exchange gains (losses)		140,209		72,271		(95,853)
Income (Loss) Before Income Taxes		(148,839)		3,132,193		1,000,449
Income tax (expense) benefit		47,636		(684,458)		(168,682)
Net Income (Loss)		(101,203)		2,447,735		831,767
Net income attributable to noncontrolling interests		(112,920)		(22,732)		(15,737)
Net Income (Loss) to Shareholders		(214,123)		2,425,003		816,030
Preferred stock dividends		(36,000)		(36,000)		(18,400)
Net Income (Loss) to Common Shareholders		(250,123)		2,389,003		797,630
OTHER COMPREHENSIVE INCOME (LOSS)
Net holding gains (losses) arising during the period		(1,155,054)		(348,315)		356,159
Reclassification adjustments for net gains (losses) included in net income (loss)		44,906		(6,623)		(3,386)
Change in net unrealized gains (losses) on available-for-sale investments, net of taxes		(1,110,148)		(354,938)		352,773
Change in foreign currency translation adjustments, net of taxes		(9,259)		(213)		29,847
Change in net actuarial pension loss, net of taxes		24,730		8,390		(6,998)
Total Other Comprehensive Income (Loss)		(1,094,677)		(346,761)		375,622
Comprehensive Income (Loss)		(1,195,880)		2,100,974		1,207,389
Comprehensive income attributable to noncontrolling interests		(112,937)		(22,730)		(15,755)
Comprehensive Income (Loss) to Shareholders		$ (1,308,817)		$ 2,078,244		$ 1,191,634
NET INCOME PER COMMON SHARE
Basic (dollars per share)		$ (23.57)		$ 176.92		$ 55.67
Diluted (dollars per share)	[4],[5]	$ (23.57)		$ 176.51		$ 55.63

[1] Segment profit for the Markel Ventures segment includes amortization of intangible assets attributable to Markel Ventures. Amortization of intangible assets attributable to the Company's underwriting segments, included in Other, was $38.5 million for the year ended December 31, 2022.

[2] Segment profit for the Markel Ventures segment includes amortization of intangible assets attributable to Markel Ventures. Amortization of intangible assets attributable to the Company's underwriting segments, included in Other, was $41.2 million for the year ended December 31, 2021.

[3] Segment profit for the Markel Ventures segment includes amortization of intangible assets attributable to Markel Ventures. Amortization of intangible assets attributable to the Company's underwriting segments, included in Other, was $41.9 million for the year ended December 31, 2020.

[4] (1)    The Company has issued grants and awards of restricted stock units to employees as performance, retention or hiring incentives, as well as awards of restricted stock to non-employee directors, under its equity incentive compensation plan. At December 31, 2022, there were 116,431 shares available for future awards under the Company's equity incentive compensation plan.

[5] (2)    The impact of 33 thousand shares from restricted stock units and restricted stock was excluded from the computation of diluted net loss per common share for the year ended December 31, 2022 because the effect would have been anti-dilutive.

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Consolidated Statements Of Changes In Equity - USD ($) $ in Thousands	Total	Total Equity [Member]	Total Shareholders' Equity [Member]	Preferred Stock [Member]	Common Stock [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Noncontrolling Interests [Member]	Redeemable Noncontrolling Interests [Member]	Velocity [Member] Total Equity [Member]	Velocity [Member] Noncontrolling Interests [Member]	Volante [Member] Total Equity [Member]	Volante [Member] Noncontrolling Interests [Member]	Lansing Building Products, LLC [Member] Redeemable Noncontrolling Interests [Member]	Buckner HeavyLift Cranes [Member] Redeemable Noncontrolling Interests [Member]	Metromont LLC [Member] Redeemable Noncontrolling Interests [Member]
Balance at Dec. 31, 2019		$ 11,078,416	$ 11,070,867	$ 0	$ 3,404,919	$ 7,457,176	$ 208,772	$ 7,549
Balance, redeemable noncontrolling interests at Dec. 31, 2019									$ 177,562
Net income (loss)	$ 831,767	819,256	816,030			816,030	0	3,226	12,511
Other comprehensive income (loss)	375,622	375,604	375,604			0	375,604	0	18
Comprehensive Income (Loss)	1,207,389	1,194,860	1,191,634					3,226	12,529
Issuance of stock		591,891	591,891	591,891	0	0	0	0	0
Repurchase of common stock		(26,832)	(26,832)	0	0	(26,832)	0	0	0
Preferred stock dividends		(18,400)	(18,400)	0	0	(18,400)	0	0	0
Restricted stock awards expensed		29,779	29,779	0	29,779	0	0	0	0
Acquisitions		0	0	0	0	0	0	0						$ 43,566
Adjustment of redeemable noncontrolling interests		(28,705)	(28,705)	0	0	(28,705)	0	0	28,705
Purchase of noncontrolling interest		(6,131)	(6,131)	0	(6,131)	0	0	0	(7,029)
Other		3,630	(487)	0	(227)	(260)	0	4,117	(9,691)
Balance at Dec. 31, 2020		12,836,983	12,822,091	591,891	3,428,340	8,217,484	584,376	14,892
Balance, redeemable noncontrolling interests at Dec. 31, 2020									245,642
Net income (loss)	2,447,735	2,432,260	2,425,003			2,425,003	0	7,257	15,475
Other comprehensive income (loss)	(346,761)	(346,759)	(346,759)			0	(346,759)	0	(2)
Comprehensive Income (Loss)	2,100,974	2,085,501	2,078,244					7,257	15,473
Repurchase of common stock		(206,518)	(206,518)	0	0	(206,518)	0	0	0
Preferred stock dividends	(36,000)	(36,000)	(36,000)	0	0	(36,000)	0	0	0
Restricted stock awards expensed		30,916	30,916	0	30,916	0	0	0	0
Acquisitions		0	0	0	0	0	0	0							$ 26,438	$ 269,908
Adjustment of redeemable noncontrolling interests		46,874	46,874	0	0	46,874	0	0	(46,874)
Purchase of noncontrolling interest		(18,779)	(18,779)	0	(18,779)	0	0	0	(38,214)
Other		1,233	522	0	602	(80)	0	711	(10,995)
Balance at Dec. 31, 2021	14,740,210	14,740,210	14,717,350	591,891	3,441,079	10,446,763	237,617	22,860
Balance, redeemable noncontrolling interests at Dec. 31, 2021	461,378								461,378
Net income (loss)	(101,203)	(127,384)	(214,123)			(214,123)	0	86,739	26,181
Other comprehensive income (loss)	(1,094,677)	(1,094,694)	(1,094,694)			0	(1,094,694)	0	17
Comprehensive Income (Loss)	(1,195,880)	(1,222,078)	(1,308,817)					86,739	26,198
Repurchase of common stock		(290,796)	(290,796)	0	0	(290,796)	0	0	0
Preferred stock dividends	(36,000)	(36,000)	(36,000)	0	0	(36,000)	0	0	0
Restricted stock awards expensed		41,684	41,684	0	41,684	0	0	0	0
Acquisitions		0	0	0	0	0	0	0								$ (22,485)
Adjustment of redeemable noncontrolling interests		(69,896)	(69,896)	0	0	(69,896)	0	0	69,896
Dispositions			0	0	0	0	0		0	$ (22,059)	$ (22,059)	$ (3,490)	$ (3,490)
Redemption of Markel CATCo Re noncontrolling interests		(22,261)	0	0	0		0	(22,261)	0
Other		13,011	12,009	0	11,130	879	0	1,002	(11,833)
Balance at Dec. 31, 2022	13,128,325	$ 13,128,325	$ 13,065,534	$ 591,891	$ 3,493,893	$ 9,836,827	$ (857,077)	$ 62,791
Balance, redeemable noncontrolling interests at Dec. 31, 2022	$ 523,154								$ 523,154

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Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
OPERATING ACTIVITIES
Net income (loss)	$ (101,203)	$ 2,447,735	$ 831,767
Adjustments to reconcile net income to net cash provided by operating activities:
Deferred income tax expense (benefit)	(281,752)	453,905	(2,733)
Depreciation and amortization	366,954	336,393	307,069
Net investment losses (gains)	1,595,733	(1,978,534)	(617,979)
Net foreign exchange losses (gains)	(140,209)	(72,271)	95,853
Gain on sale of businesses, net	(225,832)	(22,085)	0
Impairment of goodwill	80,000	0	0
Increase in receivables	(653,261)	(372,491)	(28,174)
Increase in reinsurance recoverables	(1,168,483)	(1,312,258)	(549,654)
Increase in deferred policy acquisition costs	(140,630)	(139,609)	(61,569)
Increase in prepaid reinsurance premiums	(271,292)	(347,982)	(34,480)
Increase in unpaid losses and loss adjustment expenses	2,383,268	2,042,486	1,383,430
Decrease in life and annuity benefits	(47,419)	(54,591)	(44,651)
Increase in unearned premiums	886,393	970,246	354,679
Increase in payables to insurance and reinsurance companies	210,810	131,559	76,586
Other	216,365	191,564	27,443
Net Cash Provided By Operating Activities	2,709,442	2,274,067	1,737,587
INVESTING ACTIVITIES
Proceeds from sales, maturities, calls and prepayments of fixed maturity securities	1,152,335	708,111	862,333
Cost of fixed maturity securities purchased	(2,112,066)	(3,165,323)	(1,129,781)
Proceeds from sales of equity securities	242,010	200,570	1,360,090
Cost of equity securities purchased	(442,991)	(255,436)	(192,437)
Net change in short-term investments	(846,019)	228,955	(829,457)
Additions to property and equipment	(254,712)	(145,249)	(101,301)
Acquisitions, net of cash acquired	(79,000)	(517,439)	(554,127)
Consolidation of Markel CATCo Re, net	629,955	0	0
Distributions to Markel CATCo Re noncontrolling interests for buy-out transaction	(169,380)	0	0
Proceeds from sale of businesses, net	201,370	40,720	0
Other	8,294	(32,711)	72,932
Net Cash Used By Investing Activities	(1,670,204)	(2,937,802)	(511,748)
FINANCING ACTIVITIES
Additions to senior long-term debt and other debt	1,034,052	1,198,505	223,183
Repayment of senior long-term debt and other debt	(1,255,005)	(486,730)	(275,996)
Repurchases of common stock	(290,796)	(206,518)	(26,832)
Issuance of preferred stock, net	0	0	591,891
Dividends paid on preferred stock	(36,000)	(36,000)	(18,400)
Other	(47,562)	(99,490)	(59,290)
Net Cash Provided (Used) By Financing Activities	(595,311)	369,767	434,556
Effect of foreign currency rate changes on cash, cash equivalents, restricted cash and restricted cash equivalents	(103,361)	(41,734)	55,901
Increase (decrease) in cash, cash equivalents, restricted cash and restricted cash equivalents	340,566	(335,702)	1,716,296
Cash, cash equivalents, restricted cash and restricted cash equivalents at beginning of year	4,880,947	5,216,649	3,500,353
CASH, CASH EQUIVALENTS, RESTRICTED CASH AND RESTRICTED CASH EQUIVALENTS AT END OF YEAR	$ 5,221,513	$ 4,880,947	$ 5,216,649

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Summary Of Significant Accounting Policies

12 Months Ended

Dec. 31, 2022

Accounting Policies [Abstract]

Summary Of Significant Accounting Policies

Summary of Significant Accounting Policies

Markel Corporation is a diverse financial holding company serving a variety of niche markets. Markel Corporation's principal business markets and underwrites specialty insurance products. Through its wholly owned subsidiary, Markel Ventures, Inc. (Markel Ventures), Markel Corporation also owns controlling interests in various businesses that operate outside of the specialty insurance marketplace. See note 2 for details regarding reportable segments.

a) Basis of Presentation. The accompanying consolidated financial statements have been prepared in accordance with United States (U.S.) generally accepted accounting principles (GAAP) and include the accounts of Markel Corporation and its consolidated subsidiaries, as well as any variable interest entities (VIEs) that meet the requirements for consolidation (the Company). All significant intercompany balances and transactions have been eliminated in consolidation. The Company consolidates the results of its Markel Ventures subsidiaries on a one-month lag, with the exception of significant transactions or events that occur during the intervening period. Certain prior period amounts have been reclassified to conform to the current period presentation.

b) Use of Estimates. The preparation of financial statements in accordance with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenues and expenses and the disclosure of contingent assets and liabilities. Management periodically reviews its estimates and assumptions. Quarterly reviews include evaluating the adequacy of reserves for unpaid losses and loss adjustment expenses and contingencies. Estimates and assumptions for goodwill and intangible assets are reviewed in conjunction with an acquisition, and goodwill and indefinite-lived intangible assets are reassessed at least annually for impairment. Actual results may differ materially from the estimates and assumptions used in preparing the consolidated financial statements.

c) Investments. Available-for-sale investments and equity securities are recorded at estimated fair value. Available-for-sale investments include fixed maturity securities and short-term investments. Fixed maturity securities include government and municipal bonds and mortgage-backed securities with original maturities of more than one year. Short-term investments include certificates of deposit, commercial paper, discount notes and treasury bills with original maturities of one year or less. Unrealized gains and losses on available-for-sale investments, net of income taxes, are included in other comprehensive income. Unrealized gains and losses on equity securities, net of income taxes, are included in net income as net investment gains or losses. The Company completes a detailed analysis each quarter to assess declines in the fair value of its available-for-sale investments. Any impairment losses on the Company's available-for-sale investments are recorded as an allowance, subject to reversal.

Premiums and discounts are amortized or accreted over the lives of the related fixed maturity securities as an adjustment to the yield using the effective interest method. Dividend and interest income are recognized when earned. Accrued interest receivable is excluded from both the estimated fair value and the amortized cost basis of available-for-sale securities and included within other assets on the Company's consolidated balance sheets. Any uncollectible accrued interest receivable is written off in the period it is deemed uncollectible. Realized investment gains or losses on available-for-sale investments are included in net income. Realized gains or losses from sales of available-for-sale investments are derived using the first-in, first-out method on the trade date.

See note 4 and note 5 for further details regarding the Company's investment portfolio.

d) Cash and Cash Equivalents. The Company considers all investments with original maturities of 90 days or less to be cash equivalents. The carrying value of the Company's cash and cash equivalents approximates fair value.

e) Restricted Cash and Cash Equivalents. Cash and cash equivalents that are restricted as to withdrawal or use are recorded as restricted cash and cash equivalents. The carrying value of the Company's restricted cash and cash equivalents approximates fair value.

f) Receivables. Receivables include amounts receivable from agents, brokers and insureds, which represent premiums that are both currently due and amounts not yet due on insurance and reinsurance policies. Premiums for insurance policies are generally due at inception. Premiums for reinsurance policies generally become due over the period of coverage based on the policy terms. Changes in the estimate of reinsurance premiums written will result in an adjustment to premiums receivable in

the period they are determined. Receivables also include amounts receivable from contracts with customers, which represent the Company's unconditional right to consideration for satisfying the performance obligations outlined in the contract.

The Company monitors credit risk associated with receivables, taking into consideration the fact that in certain instances in the Company's insurance operations credit risk may be reduced by the Company's right to offset loss obligations or unearned premiums against premiums receivable. An allowance is established for credit losses expected to be incurred over the life of the receivable, which is recorded net of this allowance. The allowance is charged to net income in the period the receivable is recorded and revised in subsequent periods to reflect changes in the Company's estimate of expected credit losses. See note 7 for further details regarding receivables.

g) Reinsurance Recoverables. Amounts recoverable from reinsurers are estimated in a manner consistent with the claim liability associated with the reinsured business. The Company evaluates the financial condition of its reinsurers and monitors concentration of credit risk to minimize its exposure to significant losses from individual reinsurers. To further reduce credit exposure on reinsurance recoverables, the Company has received collateral, including letters of credit and trust accounts, from certain reinsurers. Cash collateral related to these reinsurance agreements is available, without restriction, when the Company pays losses covered by the reinsurance agreements. An allowance is established for credit losses expected to be incurred over the life of the reinsurance recoverable, which is recorded net of this allowance. The allowance is charged to net income in the period the recoverable is recorded and revised in subsequent periods to reflect changes in the Company's estimate of expected credit losses. As of December 31, 2022 and 2021, the allowance for credit losses associated with the Company's reinsurance recoverables was not material to the consolidated financial statements.

h) Deferred Policy Acquisition Costs. Costs directly related to the acquisition of insurance premiums are deferred and amortized over the related policy period, generally one year. The Company only defers acquisition costs incurred that are related directly to the successful acquisition of new or renewal insurance contracts, including commissions to agents and brokers, salaries and benefits and premium taxes. Commissions received related to reinsurance premiums ceded are netted against broker commissions in determining acquisition costs eligible for deferral. To the extent that future policy revenues on existing policies are not adequate to cover related costs and expenses, deferred policy acquisition costs are charged to earnings. The Company does not consider anticipated investment income in determining whether a premium deficiency exists. See note 2(a) and (f) for further details regarding policy acquisition costs, as well as note 24 for details regarding a change to the Company's policy for accounting for deferred policy acquisition costs.

i) Goodwill and Intangible Assets. Goodwill and intangible assets are recorded as a result of business acquisitions. Goodwill represents the excess of the amount paid to acquire a business over the net fair value of assets acquired and liabilities assumed at the date of acquisition. Indefinite-lived and other intangible assets are recorded at fair value as of the acquisition date. The determination of the fair value of certain assets acquired and liabilities assumed involves significant judgment and the use of valuation models and other estimates, which require assumptions that are inherently subjective. Goodwill and indefinite-lived intangible assets are tested for impairment at least annually. The Company completes an annual test during the fourth quarter of each year based upon the results of operations through September 30. Intangible assets with definite lives are amortized using the straight-line method over their estimated useful lives, generally five to 20 years, and are reviewed for impairment when events or circumstances indicate that their carrying value may not be recoverable. See note 8 for further details regarding goodwill and intangible assets.

j) Equity Method Investments. The Company holds certain investments that are required to be accounted for under the equity method, whereby they initially are recorded at cost within other assets on the consolidated balance sheets and subsequently increased or decreased by the Company's proportionate share of the net income or loss of the investee and other transactions impacting the investee's equity. The Company records its proportionate share of net income or loss of the investee in services and other revenues. The Company records its proportionate share of other comprehensive income or loss of the investee as a component of other comprehensive income. Dividends or other equity distributions in excess of the Company's cumulative equity in earnings of the investee are recorded as a reduction of the investment. The Company reviews equity method investments for impairment when events or circumstances indicate that a decline in the fair value of the investment below its carrying value is other-than-temporary. See note 6 for further details regarding the Company's equity method investments.

k) Property and Equipment. Property and equipment is maintained primarily by certain of the Company's Markel Ventures businesses and is stated at cost less accumulated depreciation. Depreciation of property and equipment is calculated using the straight-line method over the estimated useful lives of the respective assets. Property and equipment, net of accumulated depreciation, was $1.2 billion and $1.1 billion as of December 31, 2022 and 2021, respectively, and is included in other assets on the Company's consolidated balance sheets.

l) Leases. The present value of future lease payments for the Company's leases with terms greater than 12 months is included on the consolidated balance sheets as lease liabilities and right-of-use lease assets.

The Company's lease portfolio primarily consists of operating leases for real estate. Total expected lease payments are based on the lease payments specified in the contract and the stated term, including any options to extend or terminate that the Company is reasonably certain to exercise. The Company accounts for lease components and any associated non-lease components within a contract as a single lease component, and therefore allocates all of the expected lease payments to the lease component.

The lease liability, which represents the Company's contractual obligation to make lease payments, is calculated based on the present value of expected lease payments over the remaining lease term, discounted using the Company's collateralized incremental borrowing rate at the lease commencement date. The lease liability is then adjusted for any prepaid rent, lease incentives received or capitalized initial direct costs to determine the lease asset, which represents the Company's right to use the underlying asset for the lease term. Lease liabilities and lease assets are included in other liabilities and other assets, respectively, on the Company's consolidated balance sheets.

Total lease costs are primarily comprised of rental expense for operating leases, which is recognized on a straight line basis over the lease term. Rental expense attributable to the Company's underwriting operations is included in underwriting, acquisition and insurance expenses and rental expense attributable to the Company's other operations is included in products expenses and services and other expenses in the consolidated statements of income and comprehensive income. See note 9 for further details regarding leases.

m) Inventories. Inventories are maintained at certain of the Company's Markel Ventures businesses and consist primarily of raw materials, work-in-process and finished goods. Inventories are generally valued using the first-in-first-out method and stated at the lower of cost or net realizable value. Inventories were $639.6 million and $529.3 million as of December 31, 2022 and 2021, respectively, and are included in other assets on the Company's consolidated balance sheets.

n) Redeemable Noncontrolling Interests. The Company owns controlling interests in various companies through its Markel Ventures operations. In some cases, the Company has the option to acquire the remaining equity interests, and the remaining equity interests have the option to sell their interests to the Company, in the future. The redemption value of the remaining equity interests is generally based on the respective company's earnings in specified periods preceding the redemption date. The redeemable noncontrolling interests are currently redeemable or become redeemable between 2023 and 2032.

The Company recognizes changes in the redemption value that exceed the carrying value of redeemable noncontrolling interests to retained earnings as if the balance sheet date was also the redemption date. Changes in the redemption value also result in an adjustment to net income to common shareholders in the calculation of basic and diluted net income per common share. See note 19 for further details regarding the calculation of basic and diluted net income per common share.

o) Income Taxes. The Company records deferred income taxes to reflect the net tax effect of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and their tax bases. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in years in which those temporary differences are expected to be recovered or settled. Deferred tax assets are reduced by a valuation allowance when management believes it is more likely than not that some, or all, of the deferred tax assets will not be realized. The Company recognizes the tax benefit from an uncertain tax position taken or expected to be taken in income tax returns only if it is more likely than not that the tax position will be sustained upon examination by tax authorities, based on the technical merits of the position. Tax positions that meet the more likely than not threshold are then measured using a probability weighted approach, whereby the largest amount of tax benefit that is greater than 50% likely of being realized upon ultimate settlement is recognized. The Company recognizes interest and penalties related to uncertain tax positions in income tax expense. See note 15 for further details regarding income taxes.

p) Unpaid Losses and Loss Adjustment Expenses. Unpaid losses and loss adjustment expenses on the Company's property and casualty insurance business are based on evaluations of reported claims and estimates for losses and loss adjustment expenses incurred but not reported. Estimates for losses and loss adjustment expenses incurred but not reported are based on reserve development studies, among other things. Recorded reserves are estimates, and the ultimate liability may be greater or less than the estimates. See note 11 for further details regarding unpaid losses and loss adjustment expenses.

q) Life and Annuity Benefits. The Company has a run-off block of life and annuity reinsurance contracts that subject the Company to mortality, longevity and morbidity risks. The assumptions used to determine policy benefit reserves are generally

locked-in for the life of the contract unless an unlocking event occurs. To the extent existing policy reserves, together with the present value of future gross premiums and expected investment income earned thereon, are not adequate to cover the present value of future benefits, settlement and maintenance costs, the locked-in assumptions are revised to current best estimate assumptions and a charge to earnings for life and annuity benefits is recognized at that time. Because of the assumptions and estimates used in establishing reserves for life and annuity benefit obligations and the long-term nature of these reinsurance contracts, the ultimate liability may be greater or less than the estimates. Results attributable to the run-off of life and annuity reinsurance contracts are included in services and other revenues and services and other expenses in the Company's consolidated statements of income and comprehensive income. Investment income earned on the investments that support the policy benefit reserves are included in net investment income. See note 13 for further details regarding life and annuity benefits and note 1(x) for information on changes to the accounting for life and annuity benefits beginning in 2023.

r) Revenue Recognition.

Property and Casualty Premiums

Insurance premiums written are generally recorded at the inception of a policy and earned on a pro rata basis over the policy period, typically one year. The cost of reinsurance ceded is initially recorded as prepaid reinsurance premiums and is amortized over the reinsurance contract period in proportion to the amount of insurance protection provided. Premiums ceded are netted against premiums written. For multi-year contracts where insurance premiums are payable in annual installments, written premiums are recorded at the inception of the contract based on management's best estimate of total premiums to be received. For contracts where the cedent has the ability to unilaterally commute or cancel coverage within the term of the policy, premiums are generally recorded on an annual basis or up to the contract cancellation point. The remaining premiums are estimated and included as written at each successive anniversary date within the multi-year term.

Assumed reinsurance premiums are recorded at the inception of each contract based upon contract terms and information received from cedents and brokers and are earned on a pro rata basis over the coverage period, or for multi-year contracts, in proportion with the underlying risk exposure to the extent there is variability in the exposure through the coverage period. Changes in reinsurance premium estimates are expected and may result in significant adjustments in any period. These estimates change over time as additional information regarding changes in underlying exposures is obtained. Any subsequent differences arising on such estimates are recorded as premiums written in the period they are determined and are earned on a pro rata basis over the coverage period, or immediately if the coverage period has ended. The Company uses the periodic method to account for assumed reinsurance from foreign reinsurers as a result of the sufficiency of the information provided by the reinsurer, which is consistent with its accounting for assumed reinsurance from U.S. reinsurers.

Certain contracts that the Company writes provide for reinstatement of coverage. Reinstatement premiums are the premiums for the restoration of the insurance or reinsurance limit of a contract to its full amount after a loss occurrence by the insured or reinsured. The Company accrues for reinstatement premiums resulting from losses recorded. Such accruals are based upon contractual terms and management judgment is involved with respect to the amount of losses recorded. Changes in estimates of losses recorded on contracts with reinstatement premium features will result in changes in reinstatement premiums based on contractual terms. Reinstatement premiums are recognized at the time losses are recorded and are generally earned on a pro rata basis over the remaining coverage period.

Other Revenues

Other revenues primarily relate to the Company's Markel Ventures, insurance-linked securities (ILS) and program services operations and consist of revenues from the sale of products and services. Revenues are recognized when, or as, control of the promised goods or services is transferred to the Company's customers, in an amount that reflects the consideration the Company expects to be entitled to in exchange for those goods or services. Contracts with customers generally have an original term of one year or less. For contracts with customers that have an original term greater than one year, the Company recognizes revenue at the amount for which it has a right to invoice for the products delivered or services performed. Certain customers may receive volume rebates or credits for products and services, which are accounted for as variable consideration. The Company estimates these amounts based on the expected amount to be provided to the customer and reduces revenues recognized by a corresponding amount. The Company does not expect significant changes to its estimates of variable consideration over the term of the contracts.

Payment terms for products and services vary by the type of product or service offered and the location of the customer, and payment is typically received at or shortly after the point of sale. For certain products, the Company requires partial payment

in the form of a deposit before the products are delivered to the customer, which is included in other liabilities on the Company's consolidated balance sheets.

Through its Markel Ventures operations, the Company has several different businesses that manufacture or produce a variety of products, including ornamental plants, precast concrete, equipment used in baking systems, over-the-road transportation equipment, portable dredges, residential homes and flooring for the trucking industry. Most of the Company's product revenues are recognized when the products are shipped to the customer or the products arrive at the agreed upon destination with the end customer. Some of the Company's contracts include multiple performance obligations. For such arrangements, revenues are allocated to each performance obligation based on the relative standalone selling price, which is derived from amounts stated in the contract.

Through its Markel Ventures operations, the Company also has several different businesses that provide various types of services, including distribution of exterior building products, fire protection and life safety services and consulting services. Service revenues are generally recognized over the term of the contracts based on hours incurred or as services are provided.

The Company's other revenues also include investment management fee income and through 2022, managing general agent (MGA) commissions for services provided through the Company's ILS operations. Investment management fee income is recognized over the period in which investment management services are provided and is calculated and recognized monthly, typically based on the net asset value of the accounts managed. For certain accounts, the Company is also entitled to participate, on a fixed-percentage basis, in any net income generated in excess of an agreed-upon threshold as established by the underlying investment management agreements. In general, net income is calculated at the end of each calendar year and incentive fees are payable annually. Incentive fee income is recognized at the conclusion of the contractual performance period, when the uncertainty related to performance has been resolved. MGA commissions are based on the direct written premiums of the insurance contracts placed. Commissions received for these services are generally recognized when the related policy is written.

Program services fees, or ceding fees, received in exchange for providing access to the U.S. property and casualty insurance market are based on the gross premiums written on behalf of general agent and capacity provider clients. Ceding fees are earned in a manner consistent with the recognition of the gross premiums earned on the underlying insurance policies, generally on a pro rata basis over the terms of the underlying policies reinsured.

See note 10 for further details regarding products, services and other revenues.

s) Program Services. In connection with its program services business, the Company enters into contractual agreements with both producing general agents and reinsurers, whereby the general agents and reinsurers are typically obligated to each other for payment of insurance amounts, including premiums, commissions and losses. To the extent these funds are not the obligation of the Company and are settled directly between the general agent and the reinsurer, no receivables or payables are recorded for these amounts. All obligations of the Company's insurance subsidiaries owed to or on behalf of their policyholders are recorded by the Company and, to the extent appropriate, offsetting reinsurance recoverables are recorded.

t) Foreign Currency Transactions. The U.S. Dollar is the Company's reporting currency and the primary functional currency of its foreign underwriting operations. The functional currencies of the Company's other foreign operations are the currencies of the primary economic environments in which the majority of their business is transacted.

Foreign currency transaction gains and losses are the result of exchange rate changes on transactions denominated in currencies other than the functional currency at each foreign entity. Monetary assets and liabilities are remeasured to the functional currency at current exchange rates, with resulting gains and losses included in net foreign exchange gains within net income. Non-monetary assets and liabilities are remeasured to the functional currency at historic exchange rates. Available-for-sale securities are recorded at fair value with resulting gains and losses, including the portion attributable to movements in exchange rates, included in the change in net unrealized gains on available-for-sale investments, net of taxes within other comprehensive income. While the Company attempts to naturally hedge its exposure to foreign currency fluctuations by matching assets and liabilities in the same currencies, there is a financial statement mismatch between the gains or losses recorded in net income related to insurance reserves denominated in non-functional currencies and the gains or losses recorded in other comprehensive income related to the available-for-sale securities held in non-functional currencies supporting the reserves.

Assets and liabilities of foreign operations denominated in a functional currency other than the U.S. Dollar are translated into the U.S. Dollar at current exchange rates, with resulting gains or losses included, net of taxes, in the change in foreign

currency translation adjustments within other comprehensive income. See note 20 for further details regarding the components of other comprehensive income.

u) Comprehensive Income. Comprehensive income represents all changes in equity that result from recognized transactions and other economic events during the period. Other comprehensive income refers to revenues, expenses, gains and losses that under U.S. GAAP are included in comprehensive income but excluded from net income, such as unrealized gains or losses on available-for-sale investments, foreign currency translation adjustments and changes in net actuarial pension loss. See note 20 for further details regarding other comprehensive income.

v) Net Income Per Common Share. Basic net income per common share is computed by dividing adjusted net income to shareholders by the weighted average number of common shares outstanding during the year. Diluted net income per common share is computed by dividing adjusted net income to shareholders by the weighted average number of common shares and dilutive potential common shares outstanding during the year. See note 19 for further details regarding the calculation of basic and diluted net income per common share.

w) Variable Interest Entities. The Company determines whether it has relationships with entities defined as VIEs in accordance with Financial Accounting Standards Board (FASB) Accounting Standards Codification (ASC) 810, Consolidation. Under this guidance, a VIE is consolidated by the variable interest holder that is determined to be the primary beneficiary.

An entity in which the Company holds a variable interest is a VIE if any of the following conditions exist: (a) the total equity investment at risk is not sufficient to permit the entity to finance its activities without additional subordinated financial support, (b) as a group, the holders of equity investment at risk lack either the direct or indirect ability through voting rights or similar rights to make decisions about an entity's activities that most significantly impact the entity's economic performance or the obligation to absorb the expected losses or right to receive the expected residual returns, or (c) the voting rights of some investors are disproportionate to their obligation to absorb the expected losses of the entity, their rights to receive the expected residual returns of the entity, or both and substantially all of the entity's activities either involve or are conducted on behalf of an investor with disproportionately few voting rights.

The primary beneficiary is defined as the variable interest holder that is determined to have the controlling financial interest as a result of having both (a) the power to direct the activities of a VIE that most significantly impact the economic performance of the VIE and (b) the obligation to absorb losses or right to receive benefits from the VIE that could potentially be significant to the VIE.

The Company determines whether an entity is a VIE at the inception of its variable interest in the entity and upon the occurrence of certain reconsideration events. The Company continually reassesses whether it is the primary beneficiary of VIEs in which it holds a variable interest. See note 17 for further details regarding the Company's involvement with VIEs.

x) Recent Accounting Pronouncements.

Accounting Standards Not Yet Adopted

In August 2018, the FASB issued Accounting Standards Update (ASU) No. 2018-12, Financial Services—Insurance (Topic 944): Targeted Improvements to the Accounting for Long-Duration Contracts. The FASB subsequently issued several ASUs as amendments to ASU No. 2018-12. The standard requires insurance companies with long duration contracts to: (1) review and, if there is a change, update the assumptions used to measure expected cash flows at least annually; (2) update the discount rate assumption at each reporting date; and (3) enhance certain qualitative and quantitative disclosures. ASU No. 2018-12 becomes effective for the Company during the first quarter of 2023 and will be applied using a modified retrospective approach that requires restatement of prior periods presented, including a cumulative adjustment to accumulated other comprehensive income as of January 1, 2021 (the transition date). The standard will, among other things, impact the discount rate used in estimating reserves for the Company's life and annuity reinsurance portfolio, which is in runoff. Currently, the discount rate assumption is locked-in for the life of the contracts, unless there is a loss recognition event. The adoption of ASU 2018-12 will result in a decrease to accumulated other comprehensive income of $15.3 million, net of taxes, as a result of changing the discount rate assumption as of January 1, 2021. However, the cumulative impact of changes in the discount rate assumption through the January 1, 2023 adoption date is based on the discount rate assumption determined as of the adoption date. Based on increases in interest rates between the transition date and the adoption date, the cumulative increase to accumulated other comprehensive income as of January 1, 2023 will be $89.6 million, net of taxes.

In October 2021, the FASB issued ASU No. 2021-08, Business Combinations (Topic 805): Accounting for Contract Assets and Contract Liabilities from Contracts with Customers, which becomes effective for the Company during the first quarter of 2023. ASU No. 2021-08 requires contract assets and liabilities accounted for under FASB ASC 606, Revenue from Contracts with Customers, to be recorded at the acquisition date as if the acquirer entered into those contracts itself on the contract inception dates, rather than at fair value. At adoption, ASU No. 2021-08 will not impact the Company's financial position, results of operations or cash flows, but prospectively, this ASU will impact amounts recorded by the Company for assets acquired and liabilities assumed in conjunction with certain acquisitions.

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Segment Reporting Disclosures

12 Months Ended

Dec. 31, 2022

Segment Reporting, Disclosure of Entity's Reportable Segments [Abstract]

Segment Reporting Disclosures

Segment Reporting Disclosures

The chief operating decision maker reviews the Company's ongoing underwriting operations on a global basis in the following two segments: Insurance and Reinsurance. In determining how to allocate resources and assess the performance of the Company's underwriting results, management considers many factors, including the nature of the insurance product sold, the type of account written and the type of customer served. The Insurance segment includes all direct business and facultative placements written on a risk-bearing basis within the Company's underwriting operations. The Reinsurance segment includes all treaty reinsurance written on a risk-bearing basis within the Company's underwriting operations. All investing activities related to the Company's insurance operations are included in the Investing segment.

The chief operating decision maker reviews and assesses Markel Ventures' performance in the aggregate, as a single operating segment. The Markel Ventures segment primarily consists of controlling interests in a diverse portfolio of businesses that operate in various industries.

The Company's other operations primarily consist of the results of the Company's insurance-linked securities operations and program services business. Other operations also include results for lines of business discontinued prior to, or in conjunction with, acquisitions, including development on asbestos and environmental loss reserves and results attributable to the run-off of life and annuity reinsurance business, which are monitored separately from the Company's ongoing underwriting operations. For purposes of segment reporting, none of these other operations are considered to be reportable segments.

Segment profit for each of the Company's underwriting segments is measured by underwriting profit. The property and casualty insurance industry commonly defines underwriting profit as earned premiums net of losses and loss adjustment expenses and underwriting, acquisition and insurance expenses. Underwriting profit does not replace operating income or net income computed in accordance with U.S. GAAP as a measure of profitability. Underwriting profit or loss provides a basis for management to evaluate the Company's underwriting performance. Segment profit for the Company's underwriting segments may also include other revenues and expenses that are attributable to the Company's underwriting operations that are not captured in underwriting profit. Segment profit for the Investing segment is measured by income from the Company's investment portfolio, which is comprised of net investment income and net investment gains. Segment profit for the Investing segment also includes income from equity method investments, which is included within services and other revenues. Segment profit for the Markel Ventures segment is measured by operating income.

For management reporting purposes, the Company allocates assets to its underwriting operations and to its Investing and Markel Ventures segments and certain of its other operations, including its insurance-linked securities and program services operations. Underwriting assets include assets attributed to the Company's Insurance and Reinsurance segments, discontinued underwriting lines of business, as well as assets that are not specifically allocated to the Company's other operations. Generally, the Company manages its underwriting assets in the aggregate and therefore does not allocate assets to individual underwriting segments.

a) The following tables summarize the Company's segment disclosures.

	Year Ended December 31, 2022
(dollars in thousands)	Insurance		Reinsurance		Investing		Markel Ventures		Other (1)		Consolidated
Gross premium volume	$	8,606,700	$	1,229,851	$	—	$	—	$	3,365,131	$	13,201,682
Net written premiums	7,040,176		1,167,312		—		—		(4,098)		8,203,390
Earned premiums	6,528,263		1,063,347		—		—		(3,818)		7,587,792
Losses and loss adjustment expenses:
Current accident year	(3,936,425)		(676,610)		—		—		—		(4,613,035)
Prior accident years	142,924		26,052		—		—		(1,530)		167,446
Underwriting, acquisition and insurance expenses:
Amortization of policy acquisition costs	(1,375,539)		(279,567)		—		—		—		(1,655,106)
Other underwriting expenses	(809,352)		(49,363)		—		—		(1,762)		(860,477)
Underwriting profit (loss)	549,871		83,859		—		—		(7,110)		626,620
Net investment income	—		—		445,846		909		—		446,755
Net investment losses	—		—		(1,595,733)		—		—		(1,595,733)
Products revenues	—		—		—		2,427,096		—		2,427,096
Services and other revenues	—		—		(17,661)		2,329,522		497,564		2,809,425
Products expenses	—		—		—		(2,241,736)		—		(2,241,736)
Services and other expenses	—		—		—		(2,111,510)		(195,125)		(2,306,635)
Amortization of intangible assets (2)	—		—		—		(79,043)		(99,735)		(178,778)
Impairment of goodwill	—		—		—		—		(80,000)		(80,000)
Segment profit (loss)	$	549,871	$	83,859	$	(1,167,548)	$	325,238	$	115,594	$	(92,986)
Interest expense											(196,062)
Net foreign exchange gains											140,209
Loss before income taxes											$	(148,839)

(1)    Other represents the total profit (loss) attributable to the Company's operations that are not included in a reportable segment, as well as amortization of intangible assets attributable to the underwriting segments, which is not allocated between the Insurance and Reinsurance segments.

(2)    Segment profit for the Markel Ventures segment includes amortization of intangible assets attributable to Markel Ventures. Amortization of intangible assets attributable to the Company's underwriting segments, included in Other, was $38.5 million for the year ended December 31, 2022.

	Year Ended December 31, 2021
(dollars in thousands)	Insurance		Reinsurance		Investing		Markel Ventures		Other (1)		Consolidated
Gross premium volume	$	7,239,676	$	1,246,143	$	—	$	—	$	2,952,863	$	11,438,682
Net written premiums	5,998,890		1,126,167		—		—		(5,326)		7,119,731
Earned premiums	5,465,284		1,042,048		—		—		(4,303)		6,503,029
Losses and loss adjustment expenses:
Current accident year	(3,311,185)		(749,815)		—		—		—		(4,061,000)
Prior accident years	506,292		(19,928)		—		—		(6,569)		479,795
Underwriting, acquisition and insurance expenses:
Amortization of policy acquisition costs	(1,153,049)		(266,217)		—		—		—		(1,419,266)
Other underwriting expenses	(810,929)		(61,326)		—		—		(2,218)		(874,473)
Underwriting profit (loss)	696,413		(55,238)		—		—		(13,090)		628,085
Net investment income	—		—		367,406		11		—		367,417
Net investment gains	—		—		1,978,534		—		—		1,978,534
Products revenues	—		—		—		1,712,120		—		1,712,120
Services and other revenues	—		—		7,184		1,931,696		346,445		2,285,325
Products expenses	—		—		—		(1,544,506)		—		(1,544,506)
Services and other expenses	—		109		—		(1,769,201)		(253,843)		(2,022,935)
Amortization of intangible assets (2)	—		—		—		(57,568)		(102,971)		(160,539)
Segment profit (loss)	$	696,413	$	(55,129)	$	2,353,124	$	272,552	$	(23,459)	$	3,243,501
Interest expense											(183,579)
Net foreign exchange gains											72,271
Income before income taxes											$	3,132,193

(1)    Other represents the total profit (loss) attributable to the Company's operations that are not included in a reportable segment, as well as amortization of intangible assets attributable to the underwriting segments, which is not allocated between the Insurance and Reinsurance segments.

(2)    Segment profit for the Markel Ventures segment includes amortization of intangible assets attributable to Markel Ventures. Amortization of intangible assets attributable to the Company's underwriting segments, included in Other, was $41.2 million for the year ended December 31, 2021.

	Year Ended December 31, 2020
(dollars in thousands)	Insurance		Reinsurance		Investing		Markel Ventures		Other (1)		Consolidated
Gross premium volume	$	6,029,024	$	1,130,923	$	—	$	—	$	2,106,718	$	9,266,665
Net written premiums	4,977,662		960,123		—		—		(5,547)		5,932,238
Earned premiums	4,688,448		929,348		—		—		(5,591)		5,612,205
Losses and loss adjustment expenses:
Current accident year	(3,373,085)		(700,240)		—		—		—		(4,073,325)
Prior accident years	554,586		51,755		—		—		23		606,364
Underwriting, acquisition and insurance expenses:
Amortization of policy acquisition costs	(988,668)		(240,493)		—		—		—		(1,229,161)
Other underwriting expenses	(712,280)		(74,379)		—		—		(1,807)		(788,466)
Underwriting profit (loss)	169,001		(34,009)		—		—		(7,375)		127,617
Net investment income	—		—		375,581		245		—		375,826
Net investment gains	—		—		617,979		—		—		617,979
Products revenues	—		—		—		1,439,515		—		1,439,515
Services and other revenues	—		—		(3,996)		1,355,199		338,338		1,689,541
Products expenses	—		—		—		(1,256,159)		—		(1,256,159)
Services and other expenses	—		(41,461)		—		(1,232,150)		(287,509)		(1,561,120)
Amortization of intangible assets (2)	—		—		—		(52,572)		(106,743)		(159,315)
Segment profit (loss)	$	169,001	$	(75,470)	$	989,564	$	254,078	$	(63,289)	$	1,273,884
Interest expense											(177,582)
Net foreign exchange losses											(95,853)
Income before income taxes											$	1,000,449

(1)    Other represents the total profit (loss) attributable to the Company's operations that are not included in a reportable segment, as well as amortization of intangible assets attributable to the underwriting segments, which is not allocated between the Insurance and Reinsurance segments.

(2)    Segment profit for the Markel Ventures segment includes amortization of intangible assets attributable to Markel Ventures. Amortization of intangible assets attributable to the Company's underwriting segments, included in Other, was $41.9 million for the year ended December 31, 2020.

b) The following amounts attributable to the Markel Ventures segment are also reviewed, or included in measures reviewed, by the Company's chief operating decision maker.

	Years Ended December 31,
(dollars in thousands)	2022		2021		2020
Depreciation expense	$	102,055	$	72,580	$	60,284
Interest expense (1)	$	46,780	$	35,031	$	46,664
Income tax expense	$	61,588	$	43,626	$	45,815
Capital expenditures	$	225,230	$	124,451	$	75,404

(1)    Interest expense for the years ended December 31, 2022, 2021 and 2020 included intercompany interest expense of $27.4 million, $25.8 million and $32.0 million, respectively, which was eliminated in consolidation.

c) The following table summarizes earned premiums by major product grouping within each underwriting segment.

	Years Ended December 31,
(dollars in thousands)	2022		2021		2020
Insurance segment:
General liability	$	1,927,721	$	1,564,221	$	1,261,411
Professional liability	1,739,983		1,523,536		1,141,034
Property	428,563		362,637		356,934
Marine and energy	585,885		495,897		458,050
Personal lines	489,648		451,095		405,210
Programs	384,952		222,410		238,909
Workers' compensation	385,054		354,337		338,186
Credit and surety	193,701		161,155		151,397
Other products	392,756		329,996		337,317
Total Insurance	6,528,263		5,465,284		4,688,448
Reinsurance segment:
Professional liability	398,839		320,646		243,645
General liability	382,482		314,699		195,468
Specialty	275,033		276,943		298,267
Property	6,993		129,760		191,968
Total Reinsurance	1,063,347		1,042,048		929,348
Other	(3,818)		(4,303)		(5,591)
Total earned premiums	$	7,587,792	$	6,503,029	$	5,612,205

The Company does not manage products at this level of aggregation as it offers a diverse portfolio of products and manages these products in logical groupings within each underwriting segment.

During the years ended December 31, 2022, 2021 and 2020, 80%, 80% and 79%, respectively, of gross premiums written in the Company's underwriting segments were attributed to risks or cedents located in the United States. Substantially all of the gross premiums written in the Company's program services and other fronting businesses during 2022, 2021 and 2020 were attributed to risks located in the United States.

Most of the Company's gross written premiums are placed through insurance and reinsurance brokers. During the years ended December 31, 2022, 2021 and 2020, the Company's top three independent brokers accounted for 28%, 28% and 31% of gross premiums written in the Company's underwriting segments. During the years ended December 31, 2022, 2021 and 2020, the top three independent brokers accounted for 19%, 19% and 20%, respectively, of gross premiums written in the Insurance segment and 88%, 84% and 84%, respectively, of gross premiums written in the Reinsurance segment.

d) The following table summarizes total products revenues and services and other revenues by major product and service grouping within the Company's Markel Ventures segment.

	Years Ended December 31,
(dollars in thousands)	2022		2021		2020
Products:
Consumer and building	$	1,510,130	$	911,422	$	814,697
Transportation-related	612,467		474,839		351,559
Equipment manufacturing	304,499		325,859		273,259
Total products revenues	2,427,096		1,712,120		1,439,515
Services and other:
Construction	1,910,403		1,554,592		915,696
Consulting	326,549		277,902		283,386
Other	92,570		99,202		156,117
Total services and other revenues	2,329,522		1,931,696		1,355,199
Total products revenues and services and other revenues	$	4,756,618	$	3,643,816	$	2,794,714

The Company does not manage the Markel Ventures portfolio of businesses at this level of aggregation due to the distinct characteristics of each business and the autonomy with which each business operates. Management reviews and assesses the performance of the Markel Ventures businesses in the aggregate at the Markel Ventures segment level, while individual management teams are responsible for developing strategic initiatives, managing day-to-day operations and making investment and capital allocation decisions for their respective companies.

During the years ended December 31, 2022, 2021 and 2020, the portion of Markel Ventures segment revenues attributable to U.S. operations was 96%, 95%, and 95%, respectively.

e) The following table reconciles segment assets to the Company's consolidated balance sheets.

	December 31,
(dollars in thousands)	2022		2021
Segment assets:
Investing	$	26,982,280	$	28,277,801
Underwriting	8,853,559		8,111,316
Markel Ventures	5,315,677		4,958,279
Total segment assets	41,151,516		41,347,396
Other operations	8,639,743		7,129,700
Total assets	$	49,791,259	$	48,477,096

f) The following table summarizes deferred policy acquisition costs, unearned premiums and unpaid losses and loss adjustment expenses.

(dollars in thousands)	Deferred Policy Acquisition Costs		Unearned Premiums		Unpaid Losses and Loss Adjustment Expenses
December 31, 2022
Insurance segment	$	677,921	$	4,015,252	$	11,616,386
Reinsurance segment	247,562		921,541		3,581,699
Other underwriting	—		9,473		197,602
Total underwriting	925,483		4,946,266		15,395,687
Program services and other fronting	—		1,274,482		5,204,290
Markel CATCo Re (see note 17)	—		—		347,921
Total	$	925,483	$	6,220,748	$	20,947,898
December 31, 2021
Insurance segment	$	574,181	$	3,350,054	$	10,051,994
Reinsurance segment	219,964		802,824		3,639,210
Other underwriting	—		—		271,356
Total underwriting	794,145		4,152,878		13,962,560
Program services and other fronting	—		1,230,741		4,216,334
Total	$	794,145	$	5,383,619	$	18,178,894

^[1]

[1] Interest expense for the years ended December 31, 2022, 2021 and 2020 included intercompany interest expense of $27.4 million, $25.8 million and $32.0 million, respectively, which was eliminated in consolidation.

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Acquisitions and Dispositions

12 Months Ended

Dec. 31, 2022

Business combinations, Asset acquisition and Disposition [Abstract]

Acquisitions and Dispositions

Acquisitions and Dispositions

Volante

In October 2022, the Company sold its controlling interest in its Volante managing general agent companies (Volante) for total consideration of $181.9 million, of which $155.6 million was cash. This transaction resulted in a gain of $118.5 million that was included in services and other revenue. Volante underwrites and administers specialty insurance and reinsurance policies and provides delegated underwriting services to third-party providers of insurance capital.

Velocity

In February 2022, the Company sold the majority of its controlling interest in its Velocity managing general agent companies (Velocity) for total cash consideration of $181.3 million, of which $165.6 million was received in 2022. This transaction resulted in a gain of $107.3 million that was included in services and other revenues. Velocity provides risk origination services for the Company's Nephila insurance-linked securities fund management operations, as well as for third parties. The Company retained a minority interest in Velocity that was recorded at fair value as of the transaction date ($47.4 million) and is accounted for under the equity method.

Metromont LLC

In December 2021, the Company acquired 51% of Metromont LLC (Metromont), a precast concrete manufacturer and concrete building solutions provider for commercial projects. Under the terms of the acquisition agreement, the Company has the option to acquire the remaining equity interests and the remaining equity holders have the option to sell their interests to the Company in the future. The redemption value of the remaining equity interests is generally based on Metromont's earnings in specified periods preceding the redemption date. Total consideration for the transaction was $274.5 million, all of which was cash.

As of December 31, 2021, the purchase price was preliminarily allocated to the acquired assets and liabilities of Metromont based on estimated fair value at the acquisition date. During 2022, the Company completed the process of determining the fair value of the assets acquired and liabilities assumed with Metromont and recognized goodwill of $101.6 million, intangible assets of $230.0 million and redeemable noncontrolling interests of $247.4 million. The final purchase price allocation reflected differences from the preliminary purchase price allocation, including an $86.1 million increase in the amount recognized for intangible assets upon completion of a third-party valuation and a $22.5 million decrease in the allocation to redeemable noncontrolling interests, all of which resulted in a $117.7 million decrease to goodwill from the preliminary amount recognized. Goodwill is primarily attributable to expected future earnings and cash flow potential of Metromont, of which the Company's share is deductible for income tax purposes. Intangible assets include $175.0 million of customer relationships and $55.0 million of trade names, which are being amortized over 17 years and 15 years, respectively. Results attributable to Metromont are included in the Company's Markel Ventures segment.

Buckner HeavyLift Cranes

In August 2021, the Company acquired 90% of the holding company for the Buckner HeavyLift Cranes companies (Buckner), a provider of crane rental services for large commercial contractors. Under the terms of the acquisition agreement, the Company has the option to acquire the remaining equity interests and the remaining equity holders have the option to sell their interests to the Company in the future. The redemption value of the remaining equity interests is generally based on Buckner's earnings in specified periods preceding the redemption dates. Total consideration for the transaction was $237.9 million, all of which was cash.

As of December 31, 2021, the purchase price was preliminarily allocated to the acquired assets and liabilities of Buckner based on estimated fair value at the acquisition date. During 2022, the Company completed the process of determining the fair value of the assets acquired and liabilities assumed with Buckner and recognized goodwill of $109.9 million, intangible assets of $60.0 million and fixed assets of $290.4 million, primarily related to cranes. The final purchase price allocation reflected differences from the preliminary purchase price allocation, including a $42.2 million decrease in the amount recognized for the cranes upon completion of a third-party valuation, which resulted in a $35.3 million net increase to goodwill from the preliminary amount recognized. Goodwill is primarily attributable to expected future earnings and cash flow potential of Buckner, and it is not deductible for income tax purposes. Intangible assets include $50.0 million of customer relationships and $10.0 million of trade names, which are being amortized over 7 years and 15 years, respectively. Additionally, the Company assumed long-term debt of $165.1 million and recognized redeemable noncontrolling interests of $26.4 million. Results attributable to Buckner are included in the Company's Markel Ventures segment.

Lansing Building Products, LLC

In April 2020, the Company acquired a controlling interest in Lansing Building Products, LLC, a supplier of exterior building products and materials to professional contractors throughout the U.S., which simultaneously acquired the distribution business of Harvey Building Products to enhance geographic reach and scale (together, Lansing), bringing the Company's ownership in Lansing to 91%. Under the terms of the acquisition agreement, the Company has the option to acquire the remaining equity interests and the remaining equity holders have the option to sell their interests to the Company in the future. The redemption value of the remaining equity interests is generally based on Lansing's earnings in specified periods preceding the redemption dates. Total consideration for both transactions was $559.2 million, all of which was cash.

The purchase price was allocated to the acquired assets and liabilities of Lansing based on estimated fair value at the acquisition date. The Company recognized goodwill of $287.1 million, which is primarily attributable to expected future earnings and cash flow potential of Lansing. The majority of the goodwill recognized is not deductible for income tax purposes. The Company also recognized other intangible assets of $210.0 million, which included $188.0 million of customer relationships and $22.0 million of trade names, which are being amortized over a weighted average period of 16 years and 14 years, respectively. The Company also recognized redeemable noncontrolling interests of $43.6 million. Results attributable to Lansing are included in the Company's Markel Ventures segment.

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Investments

12 Months Ended

Dec. 31, 2022

Investments, Debt and Equity Securities [Abstract]

Investments

Investments

a) The following tables summarize the Company's available-for-sale investments. Commercial and residential mortgage-backed securities include securities issued by U.S. government-sponsored enterprises and U.S. government agencies. The net unrealized holding gains (losses) in the tables below are presented before taxes and any reserve deficiency adjustments for life and annuity benefit reserves. See note 13.

	December 31, 2022
(dollars in thousands)	Amortized Cost		Gross Unrealized Holding Gains		Gross Unrealized Holding Losses		Estimated Fair Value
Fixed maturity securities:
U.S. Treasury securities	$	3,050,089	$	2,363	$	(138,493)	$	2,913,959
U.S. government-sponsored enterprises	871,463		154		(106,079)		765,538
Obligations of states, municipalities and political subdivisions	3,973,911		6,503		(247,231)		3,733,183
Foreign governments	1,473,658		2,843		(169,723)		1,306,778
Commercial mortgage-backed securities	2,109,721		395		(169,668)		1,940,448
Residential mortgage-backed securities	553,591		6		(26,804)		526,793
Asset-backed securities	1,693		—		(53)		1,640
Corporate bonds	771,761		836		(104,101)		668,496
Total fixed maturity securities	12,805,887		13,100		(962,152)		11,856,835
Short-term investments	2,663,560		5,760		(58)		2,669,262
Investments, available-for-sale	$	15,469,447	$	18,860	$	(962,210)	$	14,526,097

	December 31, 2021
(dollars in thousands)	Amortized Cost		Gross Unrealized Holding Gains		Gross Unrealized Holding Losses		Estimated Fair Value
Fixed maturity securities:
U.S. Treasury securities	$	2,489,032	$	2,633	$	(21,471)	$	2,470,194
U.S. government-sponsored enterprises	753,029		28,997		(6,439)		775,587
Obligations of states, municipalities and political subdivisions	4,007,211		266,575		(7,862)		4,265,924
Foreign governments	1,394,771		134,071		(9,488)		1,519,354
Commercial mortgage-backed securities	1,928,775		69,810		(8,152)		1,990,433
Residential mortgage-backed securities	699,136		27,084		(170)		726,050
Asset-backed securities	3,035		46		—		3,081
Corporate bonds	786,478		54,475		(4,271)		836,682
Total fixed maturity securities	12,061,467		583,691		(57,853)		12,587,305
Short-term investments	1,805,300		28		(5,340)		1,799,988
Investments, available-for-sale	$	13,866,767	$	583,719	$	(63,193)	$	14,387,293

b) The following tables summarize gross unrealized investment losses on available-for-sale investments by the length of time that securities have continuously been in an unrealized loss position.

	December 31, 2022
	Less than 12 months				12 months or longer				Total
(dollars in thousands)	Estimated Fair Value		Gross  Unrealized Holding Losses		Estimated Fair Value		Gross  Unrealized Holding Losses		Estimated Fair Value		Gross  Unrealized Holding Losses
Fixed maturity securities:
U.S. Treasury securities	$	735,605	$	(30,583)	$	1,907,922	$	(107,910)	$	2,643,527	$	(138,493)
U.S. government-sponsored enterprises	413,495		(40,488)		331,391		(65,591)		744,886		(106,079)
Obligations of states, municipalities and political subdivisions	2,474,289		(164,537)		348,943		(82,694)		2,823,232		(247,231)
Foreign governments	900,322		(115,324)		300,423		(54,399)		1,200,745		(169,723)
Commercial mortgage-backed securities	1,611,603		(117,482)		305,217		(52,186)		1,916,820		(169,668)
Residential mortgage-backed securities	516,423		(25,232)		9,342		(1,572)		525,765		(26,804)
Asset-backed securities	1,640		(53)		—		—		1,640		(53)
Corporate bonds	496,766		(74,542)		153,035		(29,559)		649,801		(104,101)
Total fixed maturity securities	7,150,143		(568,241)		3,356,273		(393,911)		10,506,416		(962,152)
Short-term investments	774,480		(58)		—		—		774,480		(58)
Total	$	7,924,623	$	(568,299)	$	3,356,273	$	(393,911)	$	11,280,896	$	(962,210)

At December 31, 2022, the Company held 1,400 available-for-sale securities in an unrealized loss position with a total estimated fair value of $11.3 billion and gross unrealized losses of $962.2 million. Of these 1,400 securities, 246 securities had been in a continuous unrealized loss position for one year or longer and had a total estimated fair value of $3.4 billion and gross unrealized losses of $393.9 million.

	December 31, 2021
	Less than 12 months				12 months or longer				Total
(dollars in thousands)	Estimated Fair Value		Gross  Unrealized Holding Losses		Estimated Fair Value		Gross  Unrealized Holding Losses		Estimated Fair Value		Gross  Unrealized Holding Losses
Fixed maturity securities:
U.S. Treasury securities	$	2,236,637	$	(18,433)	$	97,173	$	(3,038)	$	2,333,810	$	(21,471)
U.S. government-sponsored enterprises	381,495		(5,640)		14,010		(799)		395,505		(6,439)
Obligations of states, municipalities and political subdivisions	393,249		(6,941)		23,589		(921)		416,838		(7,862)
Foreign governments	322,813		(8,596)		25,564		(892)		348,377		(9,488)
Commercial mortgage-backed securities	345,616		(7,765)		9,189		(387)		354,805		(8,152)
Residential mortgage-backed securities	12,828		(159)		269		(11)		13,097		(170)
Corporate bonds	193,786		(4,271)		—		—		193,786		(4,271)
Total fixed maturity securities	3,886,424		(51,805)		169,794		(6,048)		4,056,218		(57,853)
Short-term investments	228,870		(5,340)		—		—		228,870		(5,340)
Total	$	4,115,294	$	(57,145)	$	169,794	$	(6,048)	$	4,285,088	$	(63,193)

At December 31, 2021, the Company held 277 available-for-sale securities in an unrealized loss position with a total estimated fair value of $4.3 billion and gross unrealized losses of $63.2 million. Of these 277 securities, 13 securities had been in a continuous unrealized loss position for one year or longer and had a total estimated fair value of $169.8 million and gross unrealized losses of $6.0 million.

The Company completes a detailed analysis each quarter to assess whether the decline in the fair value of any investment below its cost basis is the result of a credit loss. All available-for-sale securities with unrealized losses are reviewed. The Company considers many factors in completing its quarterly review of securities with unrealized losses for credit-related impairment to determine whether a credit loss exists, including the extent to which fair value is below cost, the implied yield to maturity, rating downgrades of the security and whether or not the issuer has failed to make scheduled principal or interest payments. The Company also takes into consideration information about the financial condition of the issuer and industry factors that could negatively impact the capital markets.

If the decline in fair value of an available-for-sale security below its amortized cost is considered to be the result of a credit loss, the Company compares the estimated present value of the cash flows expected to be collected to the amortized cost of the security. The extent to which the estimated present value of the cash flows expected to be collected is less than the amortized cost of the security represents the credit loss, which is recorded as an allowance and recognized in net income. The allowance is limited to the difference between the fair value and the amortized cost of the security. Any remaining decline in fair value represents the non-credit portion of the impairment, which is recognized in other comprehensive income. The Company did not have an allowance for credit losses as of December 31, 2022 or 2021.

Quarterly, the Company also considers whether it intends to sell an available-for-sale security or if it is more likely than not that it will be required to sell a security before recovery of its amortized cost. In these instances, a decline in fair value is recognized in net income based on the fair value of the security at the time of assessment, resulting in a new cost basis for the security. As of December 31, 2022, the Company did not intend to sell or believe it would be required to sell any available-for-sale securities in an unrealized loss position before recovery of their amortized cost.

c) The amortized cost and estimated fair value of fixed maturity securities at December 31, 2022 are shown below by contractual maturity.

(dollars in thousands)	Amortized Cost		Estimated Fair Value
Due in one year or less	$	1,363,418	$	1,337,550
Due after one year through five years	3,926,756		3,708,752
Due after five years through ten years	3,115,913		2,787,686
Due after ten years	1,734,795		1,553,966
	10,140,882		9,387,954
Commercial mortgage-backed securities	2,109,721		1,940,448
Residential mortgage-backed securities	553,591		526,793
Asset-backed securities	1,693		1,640
Total fixed maturity securities	$	12,805,887	$	11,856,835

Expected maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without penalties, and the holders may have the right to put the securities back to the issuer. Based on expected maturities, the estimated average duration of fixed maturity securities at December 31, 2022 was 3.9 years.

d) The following table presents the components of net investment income.

	Years Ended December 31,
(dollars in thousands)	2022		2021		2020
Interest:
Fixed maturity securities	$	294,417	$	283,366	$	288,421
Short-term investments	33,493		2,475		6,400
Cash and cash equivalents	28,890		479		7,921
Dividends on equity securities	107,213		98,099		89,303
	464,013		384,419		392,045
Investment expenses	(17,258)		(17,002)		(16,219)
Net investment income	$	446,755	$	367,417	$	375,826

e) The following table presents the components of net investment gains (losses) included in net income (loss) and the change in net unrealized gains (losses) included in other comprehensive income (loss). Gross realized investment gains and losses on fixed maturity securities, short-term investments and other investments were not material to the consolidated financial statements and are presented on a net basis in the following table.

	Years Ended December 31,
(dollars in thousands)	2022		2021		2020
Fixed maturity securities, short-term investments and other investments:
Net realized investment gains (losses)	$	(40,983)	$	37,908	$	14,780
Equity securities:
Change in fair value of securities sold during the period	(14,884)		25,902		(470,008)
Change in fair value of securities held at the end of the period	(1,539,866)		1,914,724		1,073,207
Total change in fair value	(1,554,750)		1,940,626		603,199
Net investment gains (losses)	$	(1,595,733)	$	1,978,534	$	617,979
Change in net unrealized gains (losses) on available-for-sale investments included in other comprehensive income (loss):
Fixed maturity securities	$	(1,474,890)	$	(504,133)	$	507,903
Short-term investments	11,014		(8,951)		2,344
Reserve deficiency adjustment for life and annuity benefit reserves (see note 13)	56,560		62,988		(68,158)
Net increase (decrease)	$	(1,407,316)	$	(450,096)	$	442,089

f) Total restricted assets are included on the Company's consolidated balance sheets as follows.

	December 31,
(dollars in thousands)	2022		2021
Investments	$	4,160,842	$	4,403,414
Restricted cash and cash equivalents	1,084,081		902,457
Total	$	5,244,923	$	5,305,871

The following table presents the components of restricted assets.

	December 31,
(dollars in thousands)	2022		2021
Assets held in trust or on deposit to support underwriting activities	$	4,807,135	$	4,895,627
Assets pledged as security for letters of credit	437,788		410,244
Total	$	5,244,923	$	5,305,871

g) At December 31, 2022 and 2021, investments in securities issued by the U.S. Treasury, U.S. government agencies and U.S. government-sponsored enterprises were the only investments in any one issuer that exceeded 10% of shareholders' equity.

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Fair Value Measurements

12 Months Ended

Dec. 31, 2022

Fair Value Disclosures [Abstract]

Fair Value Measurements [Text Block]

Fair Value Measurements

FASB ASC 820, Fair Value Measurements and Disclosures, establishes a three-level hierarchy that prioritizes the inputs to valuation techniques used to measure fair value. The fair value hierarchy gives the highest priority to quoted prices in active markets for identical assets or liabilities (Level 1) and the lowest priority to unobservable inputs (Level 3). If the inputs used to measure the assets or liabilities fall within different levels of the hierarchy, the classification is based on the lowest level input that is significant to the fair value measurement of the asset or liability.

Classification of assets and liabilities within the hierarchy considers the markets in which the assets and liabilities are traded and the reliability and transparency of the assumptions used to determine fair value. The hierarchy requires the use of observable market data when available. The levels of the hierarchy are defined as follows:

•Level 1 – Inputs to the valuation methodology are quoted prices (unadjusted) for identical assets or liabilities traded in active markets.

•Level 2 – Inputs to the valuation methodology include quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable for the asset or liability and market-corroborated inputs.

•Level 3 – Inputs to the valuation methodology are unobservable for the asset or liability and are significant to the fair value measurement.

In accordance with ASC 820, the Company determines fair value based on the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. In determining fair value, the Company uses various methods, including the market, income and cost approaches. The Company uses valuation techniques that maximize the use of observable inputs and minimize the use of unobservable inputs. The following section describes the valuation methodologies used by the Company to measure assets and liabilities at fair value, including an indication of the level within the fair value hierarchy in which each asset or liability is generally classified.

Available-for-sale investments and equity securities. Available-for-sale investments and equity securities are recorded at fair value on a recurring basis. Available-for-sale investments include fixed maturity securities and short-term investments. Fair value is determined by the Company after considering various sources of information, including information provided by a third-party pricing service. The pricing service provides prices for substantially all of the Company's fixed maturity securities and equity securities. In determining fair value, the Company generally does not adjust the prices obtained from the pricing service. The Company obtains an understanding of the pricing service's valuation methodologies and related inputs, which include, but are not limited to, reported trades, benchmark yields, issuer spreads, bids, offers, duration, credit ratings, estimated cash flows and prepayment speeds. The Company validates prices provided by the pricing service by reviewing prices from other pricing sources and analyzing pricing data in certain instances.

The Company has evaluated the various types of securities in its investment portfolio to determine an appropriate fair value hierarchy level based upon trading activity and the observability of market inputs. Level 1 investments include those traded on an active exchange, such as the New York Stock Exchange. Level 2 investments include U.S. Treasury securities, U.S. government-sponsored enterprises, municipal bonds, foreign government bonds, commercial mortgage-backed securities, residential mortgage-backed securities, asset-backed securities and corporate debt securities. Level 3 investments include the Company's investments in insurance-linked securities funds that are not traded on an active exchange and are valued using unobservable inputs.

Fair value for available-for-sale investments and equity securities is measured based upon quoted prices in active markets, if available. Due to variations in trading volumes and the lack of quoted market prices, fixed maturity securities are classified as Level 2 investments. The fair value of fixed maturity securities is normally derived through recent reported trades for identical or similar securities, making adjustments through the reporting date based upon available market observable data previously described. If there are no recent reported trades, the fair value of fixed maturity securities may be derived through the use of matrix pricing or model processes, where future cash flow expectations are developed based upon collateral performance and discounted at an estimated market rate. Significant inputs used to determine the fair value of obligations of states, municipalities and political subdivisions, corporate bonds and obligations of foreign governments include reported trades, benchmark yields, issuer spreads, bids, offers, credit information and estimated cash flows. Significant inputs used to determine the fair value of commercial mortgage-backed securities, residential mortgage-backed securities and asset-backed securities include the type of underlying assets, benchmark yields, prepayment speeds, collateral information, tranche type and volatility, estimated cash flows, credit information, default rates, recovery rates, issuer spreads and the year of issue.

Due to the significance of unobservable inputs required in measuring the fair value of the Company's investments in certain insurance-linked securities funds, these investments are classified as Level 3 within the fair value hierarchy. The fair value of the securities is derived using their reported net asset value (NAV) as the primary input, as well as other observable and unobservable inputs as deemed necessary by management. Management has obtained an understanding of the inputs, assumptions, process and controls used to determine NAV, which is calculated by an independent third party. Unobservable inputs to the NAV calculations include assumptions around premium earnings patterns and loss reserve estimates for the underlying securitized reinsurance contracts. The Company's valuation policies and procedures for Level 3 investments are determined by management. Fair value measurements are analyzed quarterly to ensure the change in fair value from prior periods is reasonable relative to management's understanding of the underlying investments, recent market trends and external market data.

Senior long-term debt and other debt. Senior long-term debt and other debt is carried at amortized cost with the estimated fair value disclosed on the consolidated balance sheets. Senior long-term debt and other debt is classified as Level 2 within the fair value hierarchy due to variations in trading volumes and the lack of quoted market prices. Fair value is generally derived through recent reported trades, making adjustments through the reporting date, if necessary, based upon available market observable data including U.S. Treasury securities and implied credit spreads. Significant inputs used to determine the fair value of senior long-term debt and other debt include reported trades, benchmark yields, issuer spreads, bids and offers.

The following tables present the balances of assets measured at fair value on a recurring basis by level within the fair value hierarchy.

	December 31, 2022
(dollars in thousands)	Level 1		Level 2		Level 3		Total
Assets:
Investments:
Fixed maturity securities, available-for-sale:
U.S. Treasury securities	$	—	$	2,913,959	$	—	$	2,913,959
U.S. government-sponsored enterprises	—		765,538		—		765,538
Obligations of states, municipalities and political subdivisions	—		3,733,183		—		3,733,183
Foreign governments	—		1,306,778		—		1,306,778
Commercial mortgage-backed securities	—		1,940,448		—		1,940,448
Residential mortgage-backed securities	—		526,793		—		526,793
Asset-backed securities	—		1,640		—		1,640
Corporate bonds	—		668,496		—		668,496
Total fixed maturity securities, available-for-sale	—		11,856,835		—		11,856,835
Equity securities:
Insurance, banks and other financial institutions	2,952,689		—		899		2,953,588
Industrial, consumer and all other	4,718,324		—		—		4,718,324
Total equity securities	7,671,013		—		899		7,671,912
Short-term investments, available-for-sale	2,510,164		159,098		—		2,669,262
Total investments	$	10,181,177	$	12,015,933	$	899	$	22,198,009

	December 31, 2021
(dollars in thousands)	Level 1		Level 2		Level 3		Total
Assets:
Investments:
Fixed maturity securities, available-for-sale:
U.S. Treasury securities	$	—	$	2,470,194	$	—	$	2,470,194
U.S. government-sponsored enterprises	—		775,587		—		775,587
Obligations of states, municipalities and political subdivisions	—		4,265,924		—		4,265,924
Foreign governments	—		1,519,354		—		1,519,354
Commercial mortgage-backed securities	—		1,990,433		—		1,990,433
Residential mortgage-backed securities	—		726,050		—		726,050
Asset-backed securities	—		3,081		—		3,081
Corporate bonds	—		836,682		—		836,682
Total fixed maturity securities, available-for-sale	—		12,587,305		—		12,587,305
Equity securities:
Insurance, banks and other financial institutions	3,307,755		—		56,472		3,364,227
Industrial, consumer and all other	5,659,700		—		—		5,659,700
Total equity securities	8,967,455		—		56,472		9,023,927
Short-term investments, available-for-sale	1,619,496		180,492		—		1,799,988
Total investments	$	10,586,951	$	12,767,797	$	56,472	$	23,411,220

The following table summarizes changes in Level 3 investments measured at fair value on a recurring basis.

(dollars in thousands)	2022		2021
Equity securities, beginning of period	$	56,472	$	58,493
Purchases	—		18,900
Sales	(56,335)		(15,015)
Net investment gains (losses)	762		(5,906)
Equity securities, end of period	$	899	$	56,472

Level 3 investments previously included the Company's investment in an insurance-linked securities fund managed by Markel CATCo Investment Management Ltd. (MCIM). In 2022, the Company's remaining investment was redeemed ($41.3 million) in conjunction with a buy-out transaction that provided for an accelerated return of all remaining capital to investors. See note 17 for further details about the Company's Markel CATCo operations and the buy-out transaction.

Except as disclosed in note 3 and note 8, the Company did not have any assets or liabilities measured at fair value on a non-recurring basis during the years ended December 31, 2022 and 2021.

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Equity Method Investments

12 Months Ended

Dec. 31, 2022

Equity Method Investments [Abstract]

Equity Method Investments Disclosure [Text Block]

Equity Method Investments

The Company holds certain investments that are accounted for under the equity method of accounting. The Company's equity method investments, which are included in other assets on the consolidated balance sheets, totaled $494.0 million and $459.7 million as of December 31, 2022 and 2021, respectively. The Company's proportionate share of earnings in its equity method investments was a loss of $22.9 million for the year ended December 31, 2022, income of $15.0 million for the year ended December 31, 2021 and a loss of $3.4 million for the year ended December 31, 2020.

The Company's most significant equity method investment is an investment in Hagerty, Inc. (Hagerty), which is accounted for on a quarter lag. Hagerty is an automotive enthusiast brand offering integrated membership products and programs as well as a specialty insurance provider focused on the global automobile enthusiast market. The Company's ownership interest in Hagerty was 23% as of December 31, 2022 and 2021. The Company's investment is comprised of Class A common shares, which are listed for trading on the New York Stock Exchange, as well as Class V common shares, associated with the

Company's original investment, that have special voting rights and can be converted on a one-for-one basis into Class A common shares. The Company accounts for its investment under the equity method as it is deemed to have the ability to exercise significant influence over Hagerty's operating and financial policies through a combination of its voting interest, its right to designate a board member and business it conducts with Hagerty. As of December 31, 2022 and 2021, the carrying value of the Company's investment in Hagerty was $245.1 million and $256.6 million, respectively.

As of December 31, 2022 and 2021, the estimated value of the Company's investment, based on the closing stock price of Hagerty's Class A common shares, was $656.0 million and $1.1 billion, respectively. See note 18 for further details regarding related party transactions with Hagerty.

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Receivables, Loans, Notes Receivable, and Others

12 Months Ended

Dec. 31, 2022

Receivables [Abstract]

Receivables

Receivables

The following table presents the components of receivables.

	December 31,
(dollars in thousands)	2022		2021
Insurance
Amounts receivable from agents, brokers and insureds	$	2,176,295	$	1,740,864
Other insurance	83,728		133,350
Markel Ventures	645,189		510,382
Other	77,961		50,379
	2,983,173		2,434,975
Allowance for credit losses	(22,117)		(21,037)
Receivables	$	2,961,056	$	2,413,938

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Goodwill And Intangible Assets

12 Months Ended

Dec. 31, 2022

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill And Intangible Assets

Goodwill and Intangible Assets

The following table presents a rollforward of the components of goodwill by reportable segment.

(dollars in thousands)	Insurance		Reinsurance		Markel Ventures		Other(1)		Total
January 1, 2021	$	772,700	$	122,745	$	901,045	$	808,134	$	2,604,624
Acquisitions	—		—		293,838		—		293,838
Foreign currency movements and other adjustments	2,012		—		1,707		(3,041)		678
December 31, 2021 (2)	$	774,712	$	122,745	$	1,196,590	$	805,093	$	2,899,140
Acquisitions	—		—		41,905		—		41,905
Dispositions	—		—		—		(132,455)		(132,455)
Impairment of goodwill	—		—		—		(80,000)		(80,000)
Adjustments to preliminary purchase price allocation	—		—		(83,358)		—		(83,358)
Foreign currency movements and other adjustments	(3,084)		—		(1,228)		(2,082)		(6,394)
December 31, 2022 (2)	$	771,628	$	122,745	$	1,153,909	$	590,556	$	2,638,838

(1)    Amounts included in Other reflect the Company's operations that are not included in a reportable segment and are primarily related to the Company's program services and insurance-linked securities operations.

(2)    As of December 31, 2022, goodwill was net of accumulated impairment losses of $190.6 million, of which $171.9 million was in Other and $18.7 million was in Markel Ventures. As of December 31, 2021, goodwill was net of accumulated impairment losses of $110.6 million, of which $91.9 million was in Other and $18.7 million was in Markel Ventures.

The Company completed its annual tests for goodwill and indefinite-lived intangible asset impairment as of October 1, 2022 based upon results of operations through September 30, 2022. See note 1 for further details regarding impairment testing. Impairment of goodwill was $80.0 million for the year ended December 31, 2022. There was no impairment of goodwill during 2021 or 2020 and no impairment of indefinite-lived intangible assets during 2022, 2021 or 2020.

The Company performed a quantitative impairment assessment for the Nephila reporting unit, which resulted in an $80.0 million impairment of goodwill, reducing the goodwill of the Nephila reporting unit to $221.8 million. The Company also evaluated the intangible assets within the Nephila reporting unit for impairment and determined they were not impaired.

The Company estimated the fair value of the Nephila reporting unit primarily using an income approach based on a discounted cash flow model. The cash flow projections used in the discounted cash flow model included the Company's best estimate of future growth and margins. The discount rates used to determine the fair value estimates were developed based on a capital asset pricing model using market-based inputs as well as an assessment of the inherent risk in projected future cash flows. The Company's fair value estimate was negatively impacted by an increase in the discount rate assumption in 2022, reflecting the increased cost of capital due to rising interest rates throughout 2022. Since acquiring Nephila in 2018, investment performance in the broader ILS market has been adversely impacted by consecutive years of elevated catastrophe losses, most recently with Hurricane Ian in 2022. These events, as well as recent volatility in the capital markets, have impacted investor decisions around allocation of capital to ILS, which in turn has impacted capital raises and redemptions within the funds Nephila manages. Following Hurricane Ian, Nephila has seen more favorable rates on the reinsurance contracts to which the Nephila Reinsurers subscribe, which is reflective of the current property catastrophe market and had a positive impact on Nephila's growth and performance projections. However, the impact of this favorable trend was more than offset by the impact of further declines in investor capital within the funds Nephila manages. Cash flow assumptions reflect the Company's best estimate of the reporting unit's future cash flows, based on information currently available, however, these assumptions are inherently uncertain, require a high degree of estimation and judgment and are subject to change depending on the outcome of future events.

The following table presents a rollforward of net intangible assets by reportable segment.

(dollars in thousands)	Underwriting(1)		Markel Ventures		Other(2)		Total
January 1, 2021	$	442,639	$	623,120	$	716,959	$	1,782,718
Acquisitions	—		203,879		—		203,879
Amortization of intangible assets	(41,182)		(57,568)		(61,789)		(160,539)
Foreign currency movements and other adjustments	(202)		(3,252)		(118)		(3,572)
December 31, 2021	$	401,255	$	766,179	$	655,052	$	1,822,486
Acquisitions	—		21,614		—		21,614
Dispositions	—		—		(2,716)		(2,716)
Amortization of intangible assets	(38,533)		(79,043)		(61,202)		(178,778)
Adjustments to preliminary purchase price allocation	—		86,773		—		86,773
Foreign currency movements and other adjustments	(400)		774		(2,289)		(1,915)
December 31, 2022	$	362,322	$	796,297	$	588,845	$	1,747,464

(1)    Amounts included in Underwriting reflect the intangible assets associated with the Company's underwriting segments, which are not allocated between the Insurance and Reinsurance segments.

(2)    Amounts included in Other reflect the Company's operations that are not included in a reportable segment and are primarily related to the Company's program services and insurance-linked securities operations.

Amortization of intangible assets is estimated to be $174.0 million for 2023, $172.1 million for 2024, $165.6 million for 2025, $157.5 million for 2026 and $149.9 million for 2027. Indefinite-lived intangible assets were $92.4 million at both December 31, 2022 and 2021.

The following table presents the components of intangible assets.

	December 31,
	2022				2021
(dollars in thousands)	Gross Carrying Amount		Accumulated Amortization		Gross Carrying Amount		Accumulated Amortization
Customer relationships	$	1,425,330	$	(498,987)	$	1,379,739	$	(405,057)
Investment management agreements	464,000		(120,394)		468,000		(92,478)
Broker relationships	204,972		(117,386)		206,855		(109,210)
Trade names	293,194		(118,976)		238,331		(100,023)
Technology	113,170		(92,646)		113,200		(82,845)
Agent relationships	92,000		(34,756)		92,000		(28,622)
Insurance licenses	74,333		—		74,333		—
Renewal rights	21,449		(21,449)		21,449		(21,449)
Other	148,326		(84,716)		145,695		(77,432)
Total	$	2,836,774	$	(1,089,310)	$	2,739,602	$	(917,116)

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Leases

12 Months Ended

Dec. 31, 2022

Leases [Abstract]

Leases [Text Block]

Leases

The Company's leases primarily consist of operating leases for real estate and have remaining terms of up to 20 years. Total lease costs for operating leases were $126.3 million, $115.4 million and $94.4 million for the years ended December 31, 2022, 2021 and 2020, respectively.

The following table summarizes details for the Company's operating leases recorded on the consolidated balance sheets.

	December 31,
(dollars in thousands)	2022			2021
Right-of-use lease assets	$	526,704		$	533,702
Lease liabilities	$	554,394		$	571,337
Weighted average remaining lease term	11.7 years			10.8 years
Weighted average discount rate	3.1		%	3.0		%

The following table summarizes maturities of the Company's operating lease liabilities as of December 31, 2022, which reconciles to total operating lease liabilities included in other liabilities on the Company's consolidated balance sheet.

Years Ending December 31,	(dollars in thousands)
2023	$	100,887
2024	85,030
2025	71,474
2026	60,729
2027	51,702
2028 and thereafter	291,290
Total lease payments	661,112
Less imputed interest	(106,718)
Total operating lease liabilities	$	554,394

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Products, Services and Other Revenues

12 Months Ended

Dec. 31, 2022

Revenue from Contract with Customer [Abstract]

Products, Services and Other Revenues

Products, Services and Other RevenuesThe amount of revenues from contracts with customers for the years ended December 31, 2022, 2021 and 2020 was $4.8 billion, $3.8 billion and $2.9 billion, respectively.

The following table presents revenues from contracts with customers by segment and type, all of which are included in products revenues and services and other revenues in the consolidated statements of income (loss) and comprehensive income (loss), along with a reconciliation to total products revenues and services and other revenues.

	Years Ended December 31,
	2022						2021						2020
(dollars in thousands)	Markel Ventures		Other		Total		Markel Ventures		Other		Total		Markel Ventures		Other		Total
Products	$	2,379,399	$	—	$	2,379,399	$	1,668,448	$	—	$	1,668,448	$	1,396,706	$	—	$	1,396,706
Services	2,265,413		43,875		2,309,288		1,863,706		134,850		1,998,556		1,295,734		116,476		1,412,210
Investment management	—		79,209		79,209		—		86,257		86,257		—		117,193		117,193
Total revenues from contracts with customers	4,644,812		123,084		4,767,896		3,532,154		221,107		3,753,261		2,692,440		233,669		2,926,109
Program services and other fronting	—		147,612		147,612		—		123,823		123,823		—		102,989		102,989
Disposition gains	—		225,828		225,828		—		—		—		—		—		—
Other	111,806		(16,621)		95,185		111,662		8,699		120,361		102,274		(2,316)		99,958
Total	$	4,756,618	$	479,903	$	5,236,521	$	3,643,816	$	353,629	$	3,997,445	$	2,794,714	$	334,342	$	3,129,056

Receivables from contracts with customers were $624.1 million and $626.1 million as of December 31, 2022 and 2021, respectively.

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Unpaid Losses And Loss Adjustment Expenses

12 Months Ended

Dec. 31, 2022

Liability for Unpaid Claims and Claims Adjustment Expense, Incurred Claims [Abstract]

Unpaid Losses And Loss Adjustment Expenses

Unpaid Losses and Loss Adjustment Expenses

a) The following table presents a reconciliation of consolidated beginning and ending reserves for losses and loss adjustment expenses.

	Years Ended December 31,
(dollars in thousands)	2022		2021		2020
Gross reserves for losses and loss adjustment expenses, beginning of year	$	18,178,894	$	16,222,376	$	14,728,676
Reinsurance recoverables on unpaid losses, beginning of year	6,876,317		5,736,659		5,253,415
Net reserves for losses and loss adjustment expenses, beginning of year	11,302,577		10,485,717		9,475,261
Effect of foreign currency rate changes on beginning of year balance	(160,622)		(54,736)		68,368
Effect of adoption of ASC 326, Financial Instruments—Credit Losses	—		—		3,849
Adjusted net reserves for losses and loss adjustment expenses, beginning of year	11,141,955		10,430,981		9,547,478
Incurred losses and loss adjustment expenses:
Current accident year	4,613,035		4,061,000		4,073,325
Prior accident years	(167,446)		(478,930)		(606,414)
Total incurred losses and loss adjustment expenses	4,445,589		3,582,070		3,466,911
Payments:
Current accident year	580,537		637,169		749,887
Prior accident years	2,396,446		2,066,290		1,779,980
Total payments	2,976,983		2,703,459		2,529,867
Effect of foreign currency rate changes on current year activity	(5,468)		(4,253)		1,195
Net reserves for losses and loss adjustment expenses of Markel CATCo Re (see note 17)	347,921		—		—
Net reserves for losses and loss adjustment expenses of insurance companies sold	—		(2,762)		—
Net reserves for losses and loss adjustment expenses, end of year	12,953,014		11,302,577		10,485,717
Reinsurance recoverables on unpaid losses, end of year	7,994,884		6,876,317		5,736,659
Gross reserves for losses and loss adjustment expenses, end of year	$	20,947,898	$	18,178,894	$	16,222,376

Catastrophe Losses

In 2022, current accident year losses and loss adjustment expenses included $46.2 million of net losses and loss adjustment expenses attributed to Hurricane Ian, all of which were within the Company's Insurance segment. These losses and loss adjustment expenses were net of ceded losses of $115.3 million. The Company also had gross losses and loss adjustment expenses of $850.0 million within its program services and other fronting operations attributed to Hurricane Ian, all of which were ceded to third-party reinsurers managed through the Company's insurance-linked securities operations, which hold sufficient investor collateral to support the Company's related reinsurance recoverables. See note 18 for further details regarding related party transactions with third parties managed through the Company's insurance-linked securities operations.

In 2021, current accident year losses and loss adjustment expenses included $195.0 million of net losses and loss adjustment expenses from Winter Storm Uri, European Floods and Hurricane Ida (2021 Catastrophes). The net losses and loss adjustment expenses on the 2021 Catastrophes for the year ended December 31, 2021 were net of ceded losses of $221.7 million.

In 2020, current accident year losses and loss adjustment expenses included $172.2 million of net losses and loss adjustment expenses from Hurricanes Isaias, Laura, Sally, Delta and Zeta, as well as wildfires in the western U.S. and the derecho in Iowa (2020 Catastrophes). The net losses and loss adjustment expenses on the 2020 Catastrophes for the year ended December 31, 2020 were net of ceded losses of $125.7 million.

Russia-Ukraine Conflict

In 2022, current accident year losses and loss adjustment expenses also included $35.7 million of net losses and loss adjustment expenses attributed to the Russia-Ukraine conflict. These losses and loss adjustment expenses were net of ceded losses of $44.3 million. The gross and net losses and loss adjustment expenses attributed to the Russia-Ukraine conflict represent the Company's best estimates as of December 31, 2022 based upon information currently available. The Company's estimates for these losses are based on reported claims, detailed underwriting, actuarial and claims reviews of policies and in-force assumed reinsurance contracts for potential exposures, as well as analysis of ceded reinsurance contracts and analysis provided by the Company's brokers and claims counsel. These estimates include various assumptions about what areas within the affected regions have incurred losses, the nature and extent of such losses, which remain difficult to verify, as well as assumptions about coverage, liability and reinsurance. Given the significant levels of ceded reinsurance on certain of the impacted policies, a significant portion of any additional incurred losses may be ceded. While the Company believes the gross and net reserves for losses and loss adjustment expenses for the Russia-Ukraine conflict as of December 31, 2022 are adequate based on information currently available, the Company continues to closely monitor reported claims, ceded reinsurance contract attachment, government actions and areas impacted by the conflict and may adjust its estimates as new information becomes available.

COVID-19 Losses

In 2020, current accident year losses and loss adjustment expenses included $358.3 million of net losses and loss adjustment expenses attributed to the COVID-19 pandemic. These losses and loss adjustment expenses were net of ceded losses of $106.2 million. In 2021, the Company increased its estimate of net losses and loss adjustments expenses by $15.7 million. In 2022, the Company decreased its estimate of net losses and loss adjustment expenses by $5.4 million.

The gross and net losses and loss adjustment expenses attributed to COVID-19 represent the Company's best estimates as of December 31, 2022 based upon information currently available. The Company's estimates are based on reported claims and still include assumptions about coverage, liability and ceded reinsurance contract attachment, which, in some cases, remain subject to judicial review. While the Company believes the gross and net reserves for losses and loss adjustment expenses for COVID-19 as of December 31, 2022 are adequate based on information available at this time, the Company continues to closely monitor reported claims, claim settlements, ceded reinsurance contract settlements and judicial decisions and may adjust its estimates as new information becomes available.

b) Reserving Methodology

The Company uses a variety of techniques to establish the liabilities for unpaid losses and loss adjustment expenses based upon estimates of the ultimate amounts payable. The Company maintains reserves for specific claims incurred and reported (case reserves) and reserves for claims incurred but not reported (IBNR reserves), which include expected development on reported claims. The Company does not discount its reserves for losses and loss adjustment expenses to reflect estimated present value, except for reserves held for a run-off book of United Kingdom (U.K.) motor business. Additionally, reserves assumed in connection with an acquisition are recorded at fair value at the acquisition date. The fair value adjustment includes an adjustment to reflect the acquired reserves for losses and loss adjustment expenses at present value plus a risk premium, the net of which is amortized to losses and loss adjustment expenses within the consolidated statements of income.

As of any balance sheet date, all claims have not yet been reported, and some claims may not be reported for many years. As a result, the liability for unpaid losses and loss adjustment expenses includes significant estimates for incurred but not reported claims.

There is normally a time lag between when a loss event occurs and when it is reported to the Company. The actuarial methods that the Company uses to estimate losses have been designed to address the lag in loss reporting as well as the delay in obtaining information that would allow the Company to more accurately estimate future payments. There is also often a time lag between cedents establishing case reserves or re-estimating their reserves and notifying the Company of those new or revised case reserves. As a result, the reporting lag is more pronounced in reinsurance contracts than in the insurance contracts. On reinsurance transactions, the reporting lag will generally be 60 to 90 days after the end of a reporting period, but can be longer in some cases. There may also be a more pronounced reporting lag, as well as reliance on third-party claims handling practices and reserve estimates, on insurance contracts for which the Company is not the primary insurer and participates only in excess layers of loss. Based on the experience of the Company's actuaries and management, the Company selects loss development factors and trending techniques to mitigate the difficulties caused by reporting lags. At least annually, the Company evaluates its loss development factors and trending assumptions using its own loss data, as well as cedent-specific and industry data, and updates them as needed.

IBNR reserves are based on the estimated ultimate cost of settling claims, including the effects of inflation and other social and economic factors, using past experience adjusted for current trends and any other factors that would modify past experience. IBNR reserves are calculated by subtracting paid losses and loss adjustment expenses and case reserves from estimated ultimate losses and loss adjustment expenses. IBNR reserves were 70% of total unpaid losses and loss adjustment expenses at December 31, 2022 compared to 67% at December 31, 2021.

In establishing liabilities for unpaid losses and loss adjustment expenses, the Company's actuaries estimate an ultimate loss ratio, by accident year or underwriting year, for each product line with input from underwriting and claims personnel. For product lines in which loss reserves are established on an underwriting year basis, the Company has developed a methodology to convert from underwriting year to accident year for financial reporting purposes. In estimating an ultimate loss ratio for a particular line of business, the actuaries may use one or more actuarial reserving methods and select from these a single point estimate. To varying degrees, these methods include detailed statistical analysis of past claim reporting, settlement activity, claim frequency and severity, policyholder loss experience, industry loss experience and changes in market and economic conditions, policy forms and exposures. Greater judgment may be required when new product lines are introduced or when there have been changes in claims handling practices, as the statistical data available may be insufficient. Greater judgment also may be required for product lines that experience a low frequency of high severity claims, particularly when the Company is reliant on third party case reserve estimates and claims handling practices. These estimates also reflect implicit and explicit assumptions regarding the potential effects of external factors, including economic and social inflation, judicial decisions, changes in law, general economic conditions and recent trends in these factors. Management believes the process of evaluating past experience, adjusted for the effects of current developments and anticipated trends, is an appropriate basis for predicting future events.

Estimates for losses from widespread catastrophic events, such as hurricanes and earthquakes, as well as pandemics and wars, are based on claims received to date, industry loss estimates and output from both industry, broker and proprietary models, as well as analysis of the Company's ceded reinsurance contracts. The Company may also perform detailed policy and reinsurance contract level reviews. The availability of data from these procedures varies depending on the timing of the event relative to the point at which the Company develops its estimates. The Company also considers loss experience on historical events that may have similar characteristics to the underlying event and current market conditions, including the level of economic inflation. Due to the inherent uncertainty in estimating such losses, these estimates are subject to variability, which increases with the severity and complexity of the underlying event. As additional claims are reported and paid, and industry loss estimates are revised, the Company incorporates this new information into its analysis and adjusts its estimate of ultimate losses and loss adjustment expenses as appropriate. For example, both the gross and net losses on Hurricane Ian and the 2021 and 2020 Catastrophes, as of December 31, 2022 represent the Company's best estimates based upon information currently available. For Hurricane Ian, these estimates are still dependent on assumptions about coverage, liability and reinsurance. While the Company believes the gross and net reserves for these events as of December 31, 2022 are adequate, it continues to closely monitor reported claims and may adjust its estimates as new information becomes available.

Loss reserves are established at management's best estimate, which is developed using the actuarially calculated point estimate as the starting point. The actuarial point estimate represents the actuaries' estimate of the most likely amount that will ultimately be paid to settle the losses that have occurred at a particular point in time; however, there is inherent uncertainty in the point estimate as it is the expected value in a range of possible reserve estimates. In some cases, actuarial analyses, which are generally based on statistical analysis, cannot fully incorporate all of the subjective factors that affect development of losses. In other cases, management's perspective of these more subjective factors may differ from the actuarial perspective. Subjective factors influencing the development of management's best estimate include: the credibility and timeliness of claims and loss information received from cedents and other third parties, economic and social inflation, judicial decisions, changes in law, changes in underwriting or claims handling practices, general economic conditions, the risk of moral hazard and other current and developing trends within the insurance and reinsurance markets, including the effects of competition. For example, the Company's loss experience in recent years has reflected higher than anticipated levels of economic inflation, as well as the impacts of social inflation.

Inherent in the Company's reserving practices is the desire to establish loss reserves that are more likely redundant than deficient, and therefore, will ultimately prove to be adequate. This approach to establishing loss reserves typically results in loss reserves that exceed the calculated actuarial point estimate. However, following an acquisition of insurance operations, acquired reserves initially are recorded at fair value, and therefore the acquired loss reserves may be closer to the actuarial point estimate until the Company builds total loss reserves that are consistent with the Company's historic level of confidence. Management continually attempts to improve its loss estimation process by refining its ability to analyze loss development patterns, claim payments and other information, but uncertainty remains regarding the potential for adverse development of estimated ultimate liabilities.

The Company's ultimate liability may be greater or less than current reserves. Changes in the Company's estimated ultimate liability for loss reserves generally occur as a result of the emergence of unanticipated loss activity, the completion of specific actuarial or claims studies or changes in internal or external factors that impact the assumptions used to derive the Company's estimates. The Company closely monitors new information on reported claims and uses statistical analyses prepared by its actuaries to evaluate the adequacy of recorded reserves. Management exercises judgment when assessing the relative credibility of loss development trends.

Management currently believes the Company's gross and net reserves are adequate. However, there is no precise method for evaluating the impact of any significant factor on the adequacy of reserves, and actual results will differ from original estimates.

c) Prior Accident Year Loss Development

The following tables summarize, by segment, the product lines with the most significant changes in prior accident years loss reserves for the years ended December 31, 2022, 2021 and 2020, along with the corresponding accident years and the trends and factors that impacted management's best estimate of ultimate losses and loss adjustment expenses on underlying products in each of these product lines. The Company does not estimate losses at this level of aggregation as it offers a diverse portfolio of products and manages these products in logical groupings within each underwriting segment. As a result of the trends and factors described in the following tables, the Company's actuaries adjusted their estimates of the ultimate liability for unpaid losses and loss adjustment expenses. Additionally, for those product lines with favorable development on prior accident years loss reserves, management has now given more credibility to the favorable trends observed by the Company's actuaries and after also incorporating these favorable trends into its best estimate, reduced prior years loss reserves accordingly. The unfavorable claims and loss trends experienced on certain accident years within the Company's professional liability and general liability product lines in 2022 reflected broader market conditions, including the effects of economic and social inflation, as well as delays in court proceedings that began in 2020 and disrupted the development of the claims trend. These trends were most impactful on the 2018 and 2019 accident years for the professional liability product lines and the 2016 to 2019 accident years for the general liability product lines. Consistent with the Company's reserving philosophy, management is responding quickly to increase loss reserves following any indication of increased claims frequency or severity in excess of previous expectations.

	Year Ended December 31, 2022
(dollars in millions)	Loss Development		Accident Years with Most Significant Development	Trends and Factors Impacting Loss Estimates
Insurance segment:
Professional liability
2018 and 2019 accident years	$	121.0	2018 and 2019	Unfavorable claims settlements and increased claim frequency and severity, primarily on directors and officers, errors and omissions and employment practices liability lines
All other accident years	(91.1)		Several	More favorable loss experience and lower loss severity than previously anticipated
General liability
2016 to 2019 accident years	61.6		2016 to 2019	Unfavorable claims settlements and increased claim frequency and severity, primarily on contractors and excess and umbrella lines
All other accident years	(20.5)		Several	Lower loss frequency and severity than previously anticipated
Workers' compensation	(62.1)		2016 to 2021	Lower loss severity than previously anticipated
Programs	(48.3)		2020 and 2021	Lower than expected frequency of claims
Property	(48.1)		2020 and 2021	Lower loss severity than originally anticipated as well as favorable development on COVID-19
Credit and surety	(31.7)		2019 to 2021	Lower than expected frequency of claims
Other products	(23.7)
Total Insurance	(142.9)
Reinsurance segment:
Property	(29.2)		2017 to 2019	Favorable development on catastrophe events
Credit and surety	(22.9)		Several	Favorable commutations on mortgage insurance contracts
Premium adjustments	53.1		2020 and 2021	Recognition of additional exposures on prior accident years related to net favorable premium adjustments primarily on general liability, credit and surety and professional liability
Other products	(27.1)
Total Reinsurance	(26.1)
Other underwriting	1.6
Total decrease	$	(167.4)

	Year Ended December 31, 2021
(dollars in millions)	Loss Development		Accident Years with Most Significant Development	Trends and Factors Impacting Loss Estimates
Insurance segment:
General liability	$	(139.7)	Several	Lower than expected frequency of claims and more favorable experience than originally anticipated across several sub-product lines
Property	(96.5)		2018 to 2020	Lower than expected frequency of large claims as well as favorable development on COVID-19 and catastrophe events
Workers' compensation	(79.0)		Several	Lower loss severity than originally anticipated
Marine and energy	(60.0)		2018 to 2020	Lower loss frequency and severity than originally anticipated
Professional liability	(54.7)		Several	Lower loss frequency and severity than originally anticipated
Other products	(76.4)
Total Insurance	(506.3)
Reinsurance segment:
Property	35.0		2020	Adverse development on COVID-19 and catastrophe events
Professional liability	29.2		Several	Recognition of additional exposures on prior accident years related to net favorable premium adjustments
General liability	(19.2)		2011, 2012, 2017 and 2020	Favorable development on COVID-19 and catastrophe events as well as lower than expected paid losses on reported claims
Credit and surety	(16.6)		2020	Favorable commutations on mortgage insurance contracts
Other products	(8.5)
Total Reinsurance	19.9
Other underwriting	6.6
Total decrease	$	(479.8)

	Year Ended December 31, 2020
(dollars in millions)	Loss Development		Accident Years with Most Significant Development	Trends and Factors Impacting Loss Estimates
Insurance segment:
General liability	$	(131.8)	Several	More favorable claims experience than originally anticipated across several sub-product lines
Professional liability	(128.9)		Several	More favorable claims experience than originally anticipated across several sub-product lines
Workers' compensation	(92.3)		2017 to 2019	Lower loss severity than originally anticipated
Marine and energy	(46.0)		2016 to 2019	Lower than expected frequency of claims
Other products	(155.6)
Total Insurance	(554.6)
Reinsurance segment:
Property	(68.4)		2017 to 2019	Lower than expected severity of claims
Public entity	34.4		2016 to 2019	Higher than expected frequency and severity of claims
Professional liability	21.0		2016 to 2019	Recognition of additional exposures on prior accident years related to net favorable premium adjustments and higher than expected loss severity and claims frequency
Other products	(38.8)
Total Reinsurance	(51.8)
Total decrease	$	(606.4)

d) Historic Loss Development

The following tables present undiscounted loss development information, by accident year, for the Company's Insurance and Reinsurance segments, including cumulative incurred and paid losses and allocated loss adjustment expenses, net of reinsurance, as well as the corresponding amount of IBNR reserves as of December 31, 2022. This level of disaggregation is consistent with how the Company analyzes loss reserves for both internal and external reporting purposes. The loss development information for the years ended December 31, 2013 through 2021 is presented as supplementary information. All amounts included in the following tables related to transactions denominated in a foreign currency have been translated into U.S. Dollars using the exchange rates in effect at December 31, 2022.

The difference between the segment loss development implied by the tables for the year ended December 31, 2022 and actual losses and loss adjustment expenses recognized on prior accident years for the Insurance and Reinsurance segments for the year ended December 31, 2022 is primarily attributed to the fact that amounts presented in these tables exclude amounts attributed to the 2012 and prior accident years. Favorable development on 2012 and prior accident years for the year ended December 31, 2022 totaled $50.8 million and $36.9 million for the Insurance and Reinsurance segments and reflects modest favorable development across many of the Company's product lines on accident years prior to 2013.

The remaining difference between the segment loss development implied by the tables for the year ended December 31, 2022 and actual losses and loss adjustment expenses on prior accident years is attributed to the fact that amounts presented in these tables exclude unallocated loss adjustment expenses and exclude amounts attributable to reserve discounting and fair value adjustments recorded in conjunction with acquisitions, as well as differences in the presentation of foreign currency movements, as previously described, none of which are material to the Insurance or Reinsurance segments.

The Insurance segment table that follows also includes claim frequency information, by accident year. The Company defines a claim as a single claim incident, per policy, which may include multiple claimants and multiple coverages on a single policy. Claim counts include claims closed without a payment as well as claims where the Company is monitoring to determine if an exposure exists, even if a reserve has not been established.

All of the business contained within the Company's Reinsurance segment represents treaty business that is assumed from other insurance or reinsurance companies, for which the Company does not have access to the underlying claim counts. Further, this business includes both quota share and excess of loss treaty reinsurance, through which only a portion of each reported claim results in losses to the Company. As such, the Company has excluded claim count information from the Reinsurance segment disclosures.

Insurance Segment

(dollars in millions)	Ultimate Incurred Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance																				Total of Incurred-but-Not-Reported Liabilities, Net of Reinsurance		Cumulative Number of Reported Claims
	Unaudited																		As of December 31,
	As of December 31,
Accident Year	2013		2014		2015		2016		2017		2018		2019		2020		2021		2022		December 31, 2022
2013	$	1,724.9	$	1,683.4	$	1,514.7	$	1,452.6	$	1,406.2	$	1,360.8	$	1,315.6	$	1,296.6	$	1,292.8	$	1,283.7	$	43.3	91,000
2014			1,850.8		1,680.7		1,613.0		1,556.8		1,508.6		1,487.4		1,455.2		1,457.7		1,438.2		52.8		86,000
2015					1,769.1		1,695.0		1,571.9		1,517.8		1,487.2		1,455.2		1,451.2		1,442.2		65.9		89,000
2016							1,858.0		1,854.2		1,756.3		1,703.9		1,677.1		1,669.8		1,682.3		86.9		101,000
2017									2,312.1		2,179.6		2,061.0		2,018.2		2,004.7		2,023.7		103.5		139,000
2018											2,432.4		2,325.5		2,099.9		2,061.6		2,153.7		194.9		193,000
2019													2,556.6		2,299.1		2,244.4		2,295.5		335.6		228,000
2020															3,083.4		2,974.7		2,914.7		1,042.6		179,000
2021																	3,085.7		2,909.0		1,483.0		137,000
2022																			4,097.4		2,791.3		121,000
Total																			$	22,240.4
	Cumulative Paid Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance
	Unaudited																		As of December 31,
	As of December 31,
Accident Year	2013		2014		2015		2016		2017		2018		2019		2020		2021		2022
2013	$	270.2	$	568.9	$	774.9	$	943.8	$	1,031.6	$	1,092.9	$	1,116.4	$	1,150.2	$	1,163.9	$	1,178.2
2014			329.6		652.6		886.6		1,052.9		1,157.3		1,240.4		1,288.8		1,308.8		1,339.9
2015					321.0		660.7		870.9		1,034.0		1,142.1		1,230.9		1,260.6		1,293.0
2016							370.3		747.4		975.4		1,160.0		1,288.3		1,351.9		1,427.5
2017									436.0		983.9		1,275.6		1,511.1		1,620.1		1,741.0
2018											492.2		1,019.3		1,346.9		1,498.3		1,674.8
2019													523.9		1,082.4		1,261.4		1,574.1
2020															807.8		1,150.9		1,518.1
2021																	474.3		988.5
2022																			834.4
Total																			$	13,569.5
All outstanding liabilities for unpaid losses and loss adjustment expenses before 2013, net of reinsurance																			237.4
Total liabilities for unpaid losses and loss adjustment expenses, net of reinsurance																			$	8,908.3

Variability in claim counts is primarily attributable to claim counts associated with a personal lines product with high claim frequency and low claim severity, which the Company did not write from 2014 to 2016. The related net incurred losses and allocated loss adjustment expenses are not material to the Insurance segment.

Reinsurance Segment

	Ultimate Incurred Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance																				Total of Incurred-but-Not-Reported Liabilities, Net of Reinsurance
	Unaudited																		As of December 31,
(dollars in millions)	As of December 31,
Accident Year	2013		2014		2015		2016		2017		2018		2019		2020		2021		2022		December 31, 2022
2013	$	579.4	$	571.8	$	538.3	$	525.4	$	533.2	$	496.1	$	478.2	$	480.0	$	475.3	$	476.9	$	32.7
2014			569.2		552.1		524.4		563.1		542.2		519.3		503.8		505.3		501.2		60.3
2015					523.1		508.8		523.7		515.0		503.9		498.6		486.3		486.6		84.4
2016							509.1		518.5		519.0		516.9		526.8		550.9		554.3		69.8
2017									895.7		928.7		934.7		936.0		908.2		920.4		105.6
2018											749.5		775.3		767.9		772.1		767.8		150.7
2019													662.0		675.6		689.2		702.7		223.4
2020															680.2		732.7		742.4		344.0
2021																	735.5		736.7		446.9
2022																			662.6		614.1
Total																			$	6,551.6
	Cumulative Paid Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance
	Unaudited																		As of December 31,
	As of December 31,
Accident Year	2013		2014		2015		2016		2017		2018		2019		2020		2021		2022
2013	$	70.6	$	153.4	$	205.5	$	263.2	$	295.6	$	324.9	$	343.3	$	358.1	$	369.5	$	383.4
2014			97.4		155.6		220.5		267.0		302.9		335.7		352.9		369.3		379.4
2015					63.6		131.2		202.0		252.7		299.6		324.1		343.7		360.3
2016							79.0		167.9		237.9		294.3		346.0		379.4		419.5
2017									157.4		358.1		479.2		560.9		624.5		693.5
2018											87.0		243.7		344.7		414.4		484.5
2019													53.5		173.6		268.4		359.6
2020															93.5		203.7		309.8
2021																	79.5		187.8
2022																			24.2
Total																			$	3,602.0
All outstanding liabilities for unpaid losses and loss adjustment expenses before 2013, net of reinsurance																			388.0
Total liabilities for unpaid losses and loss adjustment expenses, net of reinsurance																			$	3,337.6

The following table presents supplementary information about average historical claims duration as of December 31, 2022 based on the cumulative incurred and paid losses and allocated loss adjustment expenses presented above.

	Average Annual Percentage Payout of Incurred Losses by Age (in Years), Net of Reinsurance
Unaudited	1		2		3		4		5		6		7		8		9		10
Insurance	22.0	%	21.9	%	13.8	%	11.3	%	7.1	%	5.3	%	2.9	%	2.1	%	1.6	%	1.1	%
Reinsurance	12.5	%	16.4	%	13.1	%	10.4	%	8.2	%	6.3	%	4.6	%	3.3	%	2.2	%	2.9	%

The following table reconciles the net incurred and paid loss development tables to the liability for losses and loss adjustment expenses on the consolidated balance sheet.

(dollars in thousands)	December 31, 2022
Net outstanding liabilities
Insurance segment	$	8,908,308
Reinsurance segment	3,337,587
Other underwriting	89,563
Program services and other fronting	9,982
Markel CATCo Re (see note 17)	347,921
Liabilities for unpaid losses and loss adjustment expenses, net of reinsurance	12,693,361
Reinsurance recoverable on unpaid losses
Insurance segment	2,425,560
Reinsurance segment	277,854
Other underwriting	56,968
Program services and other fronting	5,234,502
Total reinsurance recoverable on unpaid losses	7,994,884
Unallocated loss adjustment expenses	326,275
Unamortized discount, net of acquisition fair value adjustments, included in unpaid losses and loss adjustment expenses	(66,622)
	259,653
Total gross liability for unpaid losses and loss adjustment expenses	$	20,947,898

e) The Company has exposure to asbestos and environmental (A&E) claims primarily resulting from policies written by acquired insurance operations before their acquisition by the Company. The Company's exposure to A&E claims originated from umbrella, excess and commercial general liability insurance policies and assumed reinsurance contracts that were written on an occurrence basis from the 1970s to mid-1980s. Exposure also originated from claims-made policies that were designed to cover environmental risks provided that all other terms and conditions of the policy were met. A&E claims include property damage and clean-up costs related to pollution, as well as personal injury allegedly arising from exposure to hazardous materials. Development on A&E loss reserves is monitored separately from the Company's ongoing underwriting operations and is not included in a reportable segment.

At December 31, 2022, A&E reserves were $153.2 million and $54.5 million on a gross and net basis, respectively. At December 31, 2021, A&E reserves were $218.6 million and $66.2 million on a gross and net basis, respectively.

The Company's reserves for losses and loss adjustment expenses related to A&E exposures represent management's best estimate of ultimate settlement values based on statistical analysis of these reserves by the Company's actuaries. A&E exposures are subject to significant uncertainty due to potential loss severity and frequency resulting from the uncertain and unfavorable legal climate. A&E reserves could be subject to increases in the future, however, management believes the Company's gross and net A&E reserves at December 31, 2022 are adequate.

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Reinsurance

12 Months Ended

Dec. 31, 2022

Reinsurance Disclosures [Abstract]

Reinsurance

ReinsuranceIn reinsurance and retrocession transactions, an insurance or reinsurance company transfers, or cedes, all or part of its exposure in return for a premium. The ceding of insurance does not legally discharge the Company from its primary liability for the full amount of the policies, and the Company will be required to pay the loss and bear collection risk if the reinsurer fails to meet its obligations under the reinsurance or retrocessional agreement. A credit risk exists with ceded reinsurance to the extent that any reinsurer is unable to meet the obligations assumed under the reinsurance or retrocessional contracts. Allowances are established for credit losses expected to be recognized over the life of the reinsurance recoverables.

Within its underwriting operations, the Company uses reinsurance and retrocessional reinsurance to manage its net retention on individual risks and overall exposure to losses while providing it with the ability to offer policies with sufficient limits to meet policyholder needs.

Within the Company's underwriting operations, at December 31, 2022 and 2021, balances recoverable from the ten largest reinsurers, by group, represented 62% and 63%, respectively, of reinsurance recoverables before considering reinsurance allowances and collateral. At December 31, 2022, the largest reinsurance balance was due from RenaissanceRe and represented 11% of reinsurance recoverables before considering reinsurance allowances and collateral.

Within its program services and other fronting businesses, the Company generally enters into quota share reinsurance agreements whereby the Company cedes to the capacity providers (reinsurers) substantially all of its gross liability under all policies issued by and on behalf of the Company by a general agent. However, there are certain programs that contain limits on the reinsurers' obligations to the Company that expose the Company to underwriting risk, including loss ratio caps, exclusions of the credit risk of producers and aggregate reinsurance limits that the Company believes are unlikely to be exceeded. The Company also remains exposed to the credit risk of the reinsurer, or the risk that one of its reinsurers becomes insolvent or otherwise unable or unwilling to pay policyholder claims. This credit risk is generally mitigated by either selecting well capitalized, highly rated authorized capacity providers or requiring that the capacity provider post substantial collateral to secure the reinsured risks, which, in some instances, exceeds the related reinsurance recoverable.

Within the Company's program services business, at December 31, 2022 and 2021, balances recoverable from the ten largest reinsurers, by group, represented 67% and 68%, respectively, of reinsurance recoverables before considering reinsurance allowances and collateral. At December 31, 2022, the largest reinsurance balance was due from Lloyd's of London (Lloyd's) and represented 13% of reinsurance recoverables before considering reinsurance allowances and collateral. All of the Company's other fronting business is conducted on behalf of its Nephila ILS operations; therefore, all of the reinsurance recoverables within these operations are attributable to entities it manages. See note 18.

The following tables summarize the effect of reinsurance and retrocessional reinsurance on premiums written and earned.

	Year Ended December 31, 2022
(dollars in thousands)	Direct		Assumed		Ceded		Net Premiums
Underwriting:
Written	$	8,085,812	$	1,761,726	$	(1,640,165)	$	8,207,373
Earned	$	7,379,766	$	1,589,920	$	(1,378,191)	$	7,591,495
Program services and other fronting:
Written	2,644,138		710,006		(3,358,127)		(3,983)
Earned	2,688,804		656,885		(3,349,392)		(3,703)
Consolidated:
Written	$	10,729,950	$	2,471,732	$	(4,998,292)	$	8,203,390
Earned	$	10,068,570	$	2,246,805	$	(4,727,583)	$	7,587,792

	Year Ended December 31, 2021
(dollars in thousands)	Direct		Assumed		Ceded		Net Premiums
Underwriting:
Written	$	6,863,229	$	1,622,700	$	(1,360,763)	$	7,125,166
Earned	$	6,275,078	$	1,482,755	$	(1,250,392)	$	6,507,441
Program services and other fronting:
Written	2,644,955		307,798		(2,958,188)		(5,435)
Earned	2,453,990		261,591		(2,719,993)		(4,412)
Consolidated:
Written	$	9,508,184	$	1,930,498	$	(4,318,951)	$	7,119,731
Earned	$	8,729,068	$	1,744,346	$	(3,970,385)	$	6,503,029

	Year Ended December 31, 2020
(dollars in thousands)	Direct		Assumed		Ceded		Net Premiums
Underwriting:
Written	$	5,715,038	$	1,444,967	$	(1,222,390)	$	5,937,615
Earned	$	5,357,888	$	1,394,239	$	(1,134,501)	$	5,617,626
Program services and other fronting:
Written	2,038,743		67,917		(2,112,037)		(5,377)
Earned	2,084,888		74,847		(2,165,156)		(5,421)
Consolidated:
Written	$	7,753,781	$	1,512,884	$	(3,334,427)	$	5,932,238
Earned	$	7,442,776	$	1,469,086	$	(3,299,657)	$	5,612,205

Substantially all of the premiums written and earned in the Company's program services and other fronting operations for the years ended December 31, 2022, 2021 and 2020 were ceded. The percentage of consolidated ceded earned premiums to gross earned premiums was 38%, 38% and 37% for the years ended December 31, 2022, 2021 and 2020, respectively. The percentage of consolidated assumed earned premiums to net earned premiums was 30%, 27% and 26% for the years ended December 31, 2022, 2021 and 2020, respectively.

Substantially all of the incurred losses and loss adjustment expenses in the Company's program services and other fronting operations were ceded. These losses totaled $3.0 billion and $2.5 billion for the years ended December 31, 2022 and 2021, respectively.

The following table summarizes the effect of reinsurance and retrocessional reinsurance on losses and loss adjustment expenses in the Company's underwriting operations.

	Years ended December 31,
(dollars in thousands)	2022		2021		2020
Gross losses and loss adjustment expenses	$	5,281,424	$	4,477,752	$	4,189,948
Ceded losses and loss adjustment expenses	(834,648)		(893,230)		(722,619)
Net losses and loss adjustment expenses	$	4,446,776	$	3,584,522	$	3,467,329

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Life And Annuity Benefits

12 Months Ended

Dec. 31, 2022

Liability for Future Policy Benefit, before Reinsurance [Abstract]

Life And Annuity Benefits

Life and Annuity Benefits

The following table presents reserves for life and annuity benefits.

	December 31,
(dollars in thousands)	2022		2021
Life	$	102,321	$	113,797
Annuities	628,441		753,971
Accident and health	28,263		35,212
Total	$	759,025	$	902,980

Life and annuity benefit reserves are compiled on a reinsurance contract-by-contract basis and are discounted using standard actuarial techniques and cash flow models. Since the development of the life and annuity reinsurance reserves is based upon cash flow projection models, the Company must make estimates and assumptions based on cedent experience, industry mortality tables, and expense and investment experience, including a provision for adverse deviation. The assumptions used to determine policy benefit reserves are generally locked-in for the life of the contract unless an unlocking event occurs. Loss recognition testing is performed to determine if existing policy benefit reserves, together with the present value of future gross premiums and expected investment income earned thereon, are adequate to cover the present value of future benefits, settlement and maintenance costs. If the existing policy benefit reserves are not sufficient, the locked-in assumptions are revised to current best estimate assumptions and a charge to earnings for life and annuity benefits is recognized at that time. See note 1(x) for information on changes to the accounting for life and annuity benefits beginning in 2023.

Life and annuity benefit reserves are also adjusted to the extent unrealized gains on the investments supporting the policy benefit reserves would result in a reserve deficiency if those gains were realized. As of December 31, 2021, the cumulative increase to life and annuity benefits attributable to unrealized gains on the underlying investment portfolio totaled $56.6 million, all of which reversed in 2022 as a result of an increase in the market yield on the investment securities supporting the policy benefit reserves. During 2021, the Company decreased life and annuity benefits by $63.0 million, reflecting an increase in the market yield on the investment securities supporting the policy benefit reserves, and increased the change in net unrealized holding gains included in other comprehensive loss by a corresponding amount. During 2020, the Company increased life and annuity benefits by $68.2 million, as a result of a decrease in the market yield on the investment securities supporting the policy benefit reserves, and decreased the change in net unrealized holding gains included in other comprehensive income by a corresponding amount.

Because of the assumptions and estimates used in establishing the Company's reserves for life and annuity benefit obligations and the long-term nature of these reinsurance contracts, the ultimate liability may be greater or less than the estimates. The average discount rate for the life and annuity benefit reserves was 2.3% as of December 31, 2022.

As of December 31, 2022, the largest life and annuity benefits reserve for a single contract was 33.7% of the total.

None of the annuities included in life and annuity benefits on the consolidated balance sheets are subject to discretionary withdrawal.

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Senior Long-Term Debt And Other Debt

12 Months Ended

Dec. 31, 2022

Debt Disclosure [Abstract]

Senior Long-Term Debt And Other Debt

Senior Long-Term Debt and Other Debt

The following table summarizes the Company's senior long-term debt and other debt.

	December 31,
(dollars in thousands)	2022		2021
4.90% unsecured senior notes, due July 1, 2022, interest payable semi-annually, net of unamortized discount of $159 in 2021	$	—	$	349,815
3.625% unsecured senior notes, due March 30, 2023, interest payable semi-annually, net of unamortized discount of $50 in 2022 and $251 in 2021	249,940		249,702
3.50% unsecured senior notes, due November 1, 2027, interest payable semi-annually, net of unamortized discount of $1,161 in 2022 and $1,445 in 2021	298,502		298,136
3.35% unsecured senior notes, due September 17, 2029, interest payable semi-annually, net of unamortized discount of $1,668 in 2022 and $1,916 in 2021	297,997		297,700
7.35% unsecured senior notes, due August 15, 2034, interest payable semi-annually, net of unamortized discount of $800 in 2022 and $868 in 2021	129,004		128,932
5.0% unsecured senior notes, due March 30, 2043, interest payable semi-annually, net of unamortized discount of $4,535 in 2022 and $4,759 in 2021	245,214		244,978
5.0% unsecured senior notes, due April 5, 2046, interest payable semi-annually, net of unamortized discount of $5,689 in 2022 and $5,933 in 2021	493,585		493,310
4.30% unsecured senior notes, due November 1, 2047, interest payable semi-annually, net of unamortized discount of $3,669 in 2022 and $3,821 in 2021	295,691		295,512
5.0% unsecured senior notes, due May 20, 2049, interest payable semi-annually, net of unamortized discount of $6,900 in 2022 and $7,161 in 2021	591,927		591,621
4.15% unsecured senior notes, due September 17, 2050, interest payable semi-annually, net of unamortized discount of $4,917 in 2022 and $5,095 in 2021	494,342		494,138
3.45% unsecured senior notes, due May 7, 2052, interest payable semi-annually, net of unamortized discount of $8,182 in 2022 and $8,461 in 2021	590,689		590,378
Other debt, at various interest rates ranging from 2.1% to 9.9%	416,738		327,044
Senior long-term debt and other debt	$	4,103,629	$	4,361,266

In May 2021, the Company issued $600 million of 3.45% unsecured senior notes due May 2052. Net proceeds to the Company were $591.4 million, before expenses. The Company used a portion of these proceeds to retire its 4.90% unsecured senior notes due July 1, 2022 ($350.0 million aggregate principal outstanding at December 31, 2021).

The Company's 7.35% unsecured senior notes due August 15, 2034 are not redeemable. The Company's other unsecured senior notes are redeemable by the Company at any time, subject to payment of a make-whole premium to the noteholders. None of the Company's senior long-term debt is subject to any sinking fund requirements.

The Company's other debt includes $414.1 million and $287.6 million associated with its Markel Ventures subsidiaries as of December 31, 2022 and 2021, respectively, which includes amounts outstanding on their respective credit facilities. The Markel Ventures debt is non-recourse to the holding company and generally is secured by the assets of those subsidiaries.

Various of the Company's Markel Ventures subsidiaries maintain revolving credit facilities or lines of credit, which provide up to $620 million of aggregate capacity for working capital and other general operational purposes. A portion of the capacity on certain of these credit facilities may be used as security for letters of credit and other obligations. At December 31, 2022 and 2021, $238.1 million and $94.3 million, respectively, of borrowings were outstanding under these credit facilities. As of December 31, 2022, one of the Company's Markel Ventures subsidiaries was not in compliance with certain financial covenants of its revolving credit facility, which had an outstanding balance of $97.9 million as of December 31, 2022. The subsidiary is working with its lenders and anticipates amending the facility. This event is not expected to have a material effect on the Company’s consolidated financial condition or results of operations. At December 31, 2022, all of the Company's other subsidiaries were in compliance with all covenants contained in their respective credit facilities.

The estimated fair value of the Company's senior long-term debt and other debt was $3.5 billion and $5.0 billion at December 31, 2022 and 2021, respectively.

The following table summarizes the future principal payments due at maturity on senior long-term debt and other debt as of December 31, 2022.

Years Ending December 31,	(dollars in thousands)
2023	$	399,604
2024	27,180
2025	24,934
2026	25,637
2027	444,335
2028 and thereafter	3,226,317
Total principal payments	$	4,148,007
Net unamortized discount	(37,572)
Net unamortized debt issuance costs	(6,806)
Senior long-term debt and other debt	$	4,103,629

The Company maintains a corporate revolving credit facility which provides up to $300 million of capacity for future acquisitions, investments and stock repurchases, and for other working capital and general corporate purposes. At the Company's discretion, up to $200 million of the total capacity may be used for letters of credit. The Company may increase the capacity of the facility by up to $200 million subject to obtaining commitments for the increase and certain other terms and conditions. The Company pays interest on balances outstanding under the facility and a utilization fee for letters of credit issued under the facility. The Company also pays a commitment fee (0.20% at December 31, 2022) on the unused portion of the facility based on the Company's leverage ratio as calculated under the credit agreement. The credit agreement includes financial covenants that require that the Company not exceed a maximum leverage ratio and maintain a minimum amount of consolidated net worth, as well as other customary covenants and events of default. At December 31, 2022 and 2021, the Company had no borrowings outstanding under this revolving credit facility. This facility expires in April 2024. As of December 31, 2022, the Company was in compliance with all covenants contained in its corporate revolving credit facility.

To the extent that the Company or any of its subsidiaries are not in compliance with the covenants under their respective credit facilities, access to such credit facilities could be restricted.

The Company paid $197.3 million, $178.6 million and $178.2 million in interest on its senior long-term debt and other debt during the years ended December 31, 2022, 2021 and 2020, respectively.

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Income Taxes

12 Months Ended

Dec. 31, 2022

Income Tax Disclosure [Abstract]

Income Tax Disclosure [Text Block]

Income Taxes

Income (loss) before income taxes includes the following components, based on country of domicile.

	Years Ended December 31,
(dollars in thousands)	2022		2021		2020
U.S. operations	$	(109,311)	$	2,263,748	$	1,003,714
Foreign operations	(39,528)		868,445		(3,265)
Income (loss) before income taxes	$	(148,839)	$	3,132,193	$	1,000,449

Income tax expense (benefit) includes the following components, based on the taxing authority to which taxes are paid. The Company's most significant U.K. and Bermuda subsidiaries have elected to be taxed as domestic corporations for U.S. tax purposes. U.S. income tax also includes state income tax expense, which is not material to the consolidated financial statements.

	Years Ended December 31,
(dollars in thousands)	2022		2021		2020
Current:
U.S. income tax	$	222,074	$	200,742	$	182,046
Foreign income tax	12,042		29,811		(10,631)
Total current tax expense	234,116		230,553		171,415
Deferred:
U.S. income tax	(300,850)		438,240		(557)
Foreign income tax	19,098		15,665		(2,176)
Total deferred tax expense (benefit)	(281,752)		453,905		(2,733)
Income tax expense (benefit)	$	(47,636)	$	684,458	$	168,682

For foreign subsidiaries that the Company has not elected to treat as domestic corporations for U.S. tax purposes, the Company is subject to the U.S. Global Intangible Low Taxes Income (GILTI) tax. The Company recognizes the impact of the GILTI tax as incurred, and for the years ended December 31, 2022, 2021 and 2020, GILTI tax was not material to the consolidated financial statements. Additionally, U.S. income taxes have not been recognized on any undistributed earnings of the Company's foreign subsidiaries that are considered indefinitely reinvested, the amount of which is not material to the consolidated financial statements.

The Company made net income tax payments of $251.5 million, $204.9 million and $241.7 million in 2022, 2021 and 2020, respectively. Income taxes payable were $2.2 million and $31.3 million at December 31, 2022 and 2021, respectively, and were included in other liabilities on the consolidated balance sheets. Income taxes receivable were $9.9 million and $18.9 million at December 31, 2022 and 2021, respectively, and were included in other assets on the consolidated balance sheets.

The following table presents a reconciliation of the Company's income taxes using the U.S. corporate income tax rate to the Company's income tax expense (benefit).

	Years Ended December 31,
(dollars in thousands)	2022				2021				2020
U.S. corporate tax rate	$	(31,256)	21.0	%	$	657,760	21.0	%	$	210,093	21.0	%
Increase (decrease) resulting from:
Tax-exempt investment income	(16,063)		10.8		(16,109)		(0.5)		(16,415)		(1.6)
Foreign operations	5,335		(3.6)		14,443		0.5		6,500		0.6
Impairment of goodwill	16,800		(11.3)		—		0.0		—		0.0
Markel CATCo Re income not subject to tax	(18,871)		12.7		—		0.0		—		0.0
Nondeductible (deductible) losses on certain foreign investments	(160)		0.1		1,240		0.0		(38,666)		(3.9)
Other	(3,421)		2.3		27,124		0.9		7,170		0.7
Income tax expense (benefit)	$	(47,636)	32.0	%	$	684,458	21.9	%	$	168,682	16.8	%

The following table presents the components of domestic and foreign deferred tax assets and liabilities.

	December 31,
(dollars in thousands)	2022		2021
Assets:
Unpaid losses and loss adjustment expenses	$	170,518	$	186,759
Unearned premiums	161,243		139,350
Lease liabilities	132,735		135,795
Life and annuity benefits	54,893		78,777
Accrued incentive compensation	39,469		50,806
Net operating loss carryforwards	25,305		47,510
Tax credit carryforwards	18,264		21,734
Other differences between financial reporting and tax bases	65,250		66,951
Total gross deferred tax assets	667,677		727,682
Less valuation allowance	(16,943)		(23,352)
Total gross deferred tax assets, net of allowance	650,734		704,330
Liabilities:
Investments	761,421		1,401,871
Goodwill and other intangible assets	180,186		185,195
Deferred policy acquisition costs	161,220		146,601
Property, plant and equipment	144,259		126,846
Right-of-use lease assets	127,398		127,313
Other differences between financial reporting and tax bases	113,065		129,866
Total gross deferred tax liabilities	1,487,549		2,117,692
Net deferred tax liability	$	836,815	$	1,413,362

Deferred tax assets and liabilities are recorded on the consolidated balance sheets on a net basis by taxing jurisdiction. As of December 31, 2022 and 2021, the Company's consolidated balance sheets included net deferred tax liabilities of $874.0 million and $1.4 billion, respectively, in other liabilities and net deferred tax assets of $37.2 million and $18.4 million, respectively, in other assets.

At December 31, 2022, the Company had tax credit carryforwards of $18.3 million, substantially all of which related to foreign tax credits to be used against U.S. income tax. The Company expects to utilize all tax credit carryforwards before expiration. The earliest any of these credits will expire is 2031.

At December 31, 2022, the Company also had net operating losses of $82.0 million that can be used to offset future taxable income, most of which is attributable to losses of certain branch operations in Europe incurred in their local jurisdictions. The Company's ability to use the majority of these losses is not subject to expiration. As described below, the deferred tax assets related to losses at certain of the Company's subsidiaries and branches are offset by valuation allowances.

At December 31, 2022, the Company had total gross deferred tax assets of $667.7 million. The Company has a valuation allowance of $16.9 million to offset gross deferred tax assets primarily attributable to cumulative net operating losses at certain of the Company's subsidiaries and branches. The Company believes that it is more likely than not that it will realize the remaining $650.7 million of gross deferred tax assets through generating taxable income or the reversal of existing temporary differences attributable to the gross deferred tax liabilities. Additionally, the Company's net deferred tax liability for investments includes deferred tax assets attributed to its unrealized losses on fixed maturity securities. The Company has the ability and intent to execute a tax planning strategy such that it is more likely than not that all of these deferred tax assets will be realized.

At December 31, 2022, the Company did not have any material unrecognized tax benefits. The Company does not anticipate any changes in unrecognized tax benefits during 2023 that would have a material impact on the Company's income tax provision.

The Company is subject to income tax in the U.S. and in foreign jurisdictions. The Internal Revenue Service is currently examining the Company's 2017 U.S. federal income tax return. The Company believes its income tax liabilities are adequate as of December 31, 2022, however, these liabilities could be adjusted as a result of this examination. With few exceptions, the Company is no longer subject to income tax examination by tax authorities for years ended before January 1, 2017.

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Employee Benefit Plans

12 Months Ended

Dec. 31, 2022

Postemployment Benefits [Abstract]

Employee Benefit Plans

Employee Benefit Plans

a) The Company maintains defined contribution plans for employees of its U.S. insurance operations in accordance with Section 401(k) of the U.S. Internal Revenue Code of 1986. Employees of the Company's Markel Ventures subsidiaries are provided post-retirement benefits under separate defined contribution plans. The Company also provides various defined contribution plans for employees of its international insurance operations, which are in line with local market terms and conditions of employment. Expenses relating to the Company's defined contribution plans were $57.9 million, $52.7 million and $48.6 million in 2022, 2021 and 2020, respectively.

b) The Terra Nova Pension Plan is a defined benefit plan that covers certain employees in the Company's international insurance operations who meet the eligibility conditions set out in the plan. The plan has been closed to new participants since 2001, and employees have not accrued benefits for future service in the plan since April 2012. The projected benefit obligations of the Terra Nova Pension Plan as of December 31, 2022 and 2021 were $108.5 million and $210.2 million, respectively, and the related fair value of plan assets was $171.7 million and $243.6 million, respectively. The corresponding net asset for pension benefits, also referred to as the funded status of the plan, at December 31, 2022 and 2021 was included in other assets on the Company's consolidated balance sheets.

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Variable Interest Entities

12 Months Ended

Dec. 31, 2022

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Variable Interest Entities

Variable Interest Entities

MCIM, a wholly-owned consolidated subsidiary of the Company, is an insurance-linked securities investment fund manager and reinsurance manager headquartered in Bermuda. Results attributable to MCIM are not included in a reportable segment.

MCIM serves as the insurance manager for Markel CATCo Re Ltd. (Markel CATCo Re), a Bermuda Class 3 reinsurance company, and as the investment manager for Markel CATCo Reinsurance Fund Ltd., a Bermuda exempted mutual fund company comprised of multiple segregated accounts (Markel CATCo Funds). Voting shares in Markel CATCo Reinsurance Fund Ltd. and Markel CATCo Re are held by MCIM, which has the power to direct the activities that most significantly impact the economic performance of these entities. The Markel CATCo Funds issued multiple classes of nonvoting, redeemable preference shares to investors, and the Markel CATCo Funds are primarily invested in nonvoting preference shares of Markel CATCo Re. The underwriting results of Markel CATCo Re are attributed to investors through its nonvoting preference shares. Both Markel CATCo Re and the Markel CATCo Funds were placed into run-off in July 2019.

In March 2022, the Company completed a buy-out transaction with Markel CATCo Re and the Markel CATCo Funds that provided for an accelerated return of all remaining capital to investors in the Markel CATCo Funds. Under the terms of the transaction, the Company provided cash funding of $45.1 million to purchase substantially all of the Markel CATCo Funds' interests in Markel CATCo Re. See note 21 for further details regarding the terms of the buy-out transaction. As part of the transaction, substantially all of the preference shares held by investors in the Markel CATCo Funds were redeemed, including preference shares previously held by the Company. See note 5 for details regarding the Company's investment in the Markel CATCo Funds.

During June 2022, the Company received a return of $24.9 million of the capital it provided in March 2022 and the related preference shares were redeemed. As of December 31, 2022, the Company's investment in the remaining preference shares of Markel CATCo Re totaled $20.1 million, which comprised 23% of the equity of Markel CATCo Re. Through that investment, the Company has exposure to adverse loss development on reinsurance contracts previously written by Markel CATCo Re for loss events that occurred from 2014 to 2020. If loss reserves held by Markel CATCo Re are sufficient to settle claims on the remaining open contracts, the Company will receive a full return of the remaining $20.1 million in capital. Favorable development on loss reserves held by Markel CATCo Re, less operating expenses, will be distributed to the Markel CATCo Funds, and ultimately to investors in the Markel CATCo Funds.

Markel CATCo Re is considered a VIE, as the equity at risk does not have the right to receive residual returns that exceed the capital provided by the Company in the buy-out transaction. As a result of the preference shares acquired by the Company in the buy-out transaction, and the voting shares held by its consolidated subsidiary, MCIM, the Company consolidates Markel CATCo Re as its primary beneficiary. Results attributed to the run-off of Markel CATCo Re are reported with the Company's other ILS operations, within services and other revenues and expenses, and are not included in a reportable segment. For the

year ended December 31, 2022, there was $89.9 million of favorable loss reserve development on the run-off of reinsurance contracts written by Markel CATCo Re, all of which was included in services and other expenses and attributable to noncontrolling interests.

The Company's consolidated balance sheet includes the following amounts attributable to Markel CATCo Re.

(dollars in thousands)	December 31, 2022
Assets
Cash and cash equivalents	$	104,443
Restricted cash and cash equivalents	317,577
Other assets and receivables due from cedents	41,357
Total Assets	$	463,377
Liabilities and Equity
Unpaid losses and loss adjustment expenses	$	347,921
Other liabilities	26,717
Total Liabilities	374,638
Shareholders' equity	21,139
Noncontrolling interests	67,600
Total Equity	88,739
Total Liabilities and Equity	$	463,377

In connection with the buy-out transaction, the Company also entered into a tail risk cover with Markel CATCo Re. Through this contract, the Company has $142.7 million of uncollateralized exposure to adverse development on loss reserves held by Markel CATCo Re for loss exposures in excess of limits that the Company believes are unlikely to be exceeded.

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Related Party Transactions

12 Months Ended

Dec. 31, 2022

Related Party Transactions [Abstract]

Related Party Transactions [Text Block]

Related Party Transactions

The Company engages in certain related party transactions in the normal course of business at arm's length.

Insurance-Linked Securities

Within the Company's insurance-linked securities operations, the Company provides investment and insurance management services through Nephila Holdings Ltd. (together with its subsidiaries, Nephila). Nephila serves as the investment manager to several Bermuda based private funds (the Nephila Funds). To provide access for the Nephila Funds to a variety of insurance-linked securities in the property catastrophe, climate and specialty markets, Nephila also acts as an insurance manager to certain Bermuda Class 3 and 3A reinsurance companies, Lloyd's Syndicate 2357 and Lloyd's Syndicate 2358 (collectively, the Nephila Reinsurers). Nephila receives management fees for investment and insurance management services provided through its insurance-linked securities operations primarily based on the net asset value of the accounts managed, and, for certain funds, incentive fees based on their annual performance. Prior to the disposition of Velocity in February 2022, Nephila also provided managing general agent services to the Nephila Reinsurers in exchange for commissions. For the years ended December 31, 2022, 2021 and 2020, total revenues attributed to unconsolidated entities managed by Nephila were $79.5 million, $141.9 million and $152.0 million, respectively.

Through the Company's program services and other fronting operations, as well as its underwriting operations, the Company has programs with Nephila through which the Company writes insurance policies that are either partially or fully ceded to Nephila Reinsurers. Through the Company's program services and other fronting platforms, Nephila utilizes certain of the Company's licensed insurance companies to write U.S. catastrophe exposed property risk that is then ceded to Nephila Reinsurers. For the years ended December 31, 2022, 2021 and 2020, gross premiums written through the Company's program services and other fronting platforms on behalf of Nephila were $1.0 billion, $689.2 million and $412.4 million, respectively, all of which were ceded to Nephila Reinsurers. Through the Company's insurance underwriting operations, the Company has a quota share agreement with Nephila through which it cedes a portion of its property business to Nephila Reinsurers. For the years ended December 31, 2022, 2021 and 2020, the Company's underwriting operations ceded premiums of $65.6 million, $55.0 million and $47.6 million, respectively, to Nephila Reinsurers as part of its quota share agreement.

As of December 31, 2022 and 2021, reinsurance recoverables on the consolidated balance sheets included $1.4 billion and $807.0 million, respectively, due from Nephila Reinsurers. Under its programs with Nephila Reinsurers, the Company bears underwriting risk for annual aggregate agreement year losses in excess of a limit the Company believes is unlikely to be exceeded. To the extent losses under these programs exceed the prescribed limits, the Company is obligated to pay such losses to the cedents without recourse to the Nephila Reinsurers. While the Company believes losses under these programs are unlikely, those losses, if incurred, could be material to the Company's consolidated results of operations and financial condition.

The Company has also entered into other assumed and ceded reinsurance transactions with the Nephila Reinsurers in the normal course of business, which are not material to the Company's consolidated financial statements.

Hagerty

The Company holds a minority ownership interest in Hagerty, which operates primarily as a managing general agent and also includes Hagerty Reinsurance Limited (Hagerty Re), a Bermuda Class 3 reinsurance company. Through the Company's underwriting operations, the Company underwrites insurance for Hagerty, and a portion of this insurance is ceded to Hagerty Re. For the years ended December 31, 2022, 2021 and 2020, the Company's gross written premiums attributable to Hagerty were $689.7 million, $596.9 million and $506.7 million, respectively, of which $456.6 million, $338.9 million and $239.3 million, respectively, were ceded to Hagerty Re. As of December 31, 2022 and 2021, reinsurance recoverables on the consolidated balance sheets included $159.7 million and $95.6 million, respectively, due from Hagerty Re.

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Shareholders' Equity

12 Months Ended

Dec. 31, 2022

Stockholders' Equity Note [Abstract]

Shareholders' Equity

Shareholders' Equity

a) The Company has 50,000,000 shares of no par value common stock authorized. The following table presents a rollforward of changes in common shares issued and outstanding.

	Years Ended December 31,
(in thousands)	2022	2021
Issued and outstanding common shares, beginning of year	13,632	13,783
Issuance of common shares	24	18
Repurchase of common shares	(233)	(169)
Issued and outstanding common shares, end of year	13,423	13,632

b) The Company also has 10,000,000 shares of no par value preferred stock authorized, of which 600,000 shares were issued and outstanding at December 31, 2022 and 2021. The Company has the option to redeem the preferred shares:

•in whole but not in part, at any time, within 90 days after the occurrence of a "rating agency event," at $1,020 per preferred share, plus accrued and unpaid dividends,

•in whole but not in part, at any time, within 90 days after the occurrence of a "regulatory capital event" at $1,000 per preferred share, plus accrued and unpaid dividends, or

•in whole or in part, on June 1, 2025, or every fifth anniversary of that date, at $1,000 per preferred share, plus accrued and unpaid dividends.

A "rating agency event" means that any nationally recognized statistical rating organization that publishes a rating for the Company amends, clarifies or changes the criteria it uses to assign equity credit to securities like the preferred shares, which results in shortening the length of time that the preferred shares are assigned a particular level of equity credit or in the lowering of the equity credit assigned to the preferred shares.

A "regulatory capital event" means that the Company becomes subject to capital adequacy supervision by a capital regulator and determines that, under such capital adequacy guidelines, the liquidation preference amount of the preferred shares would not qualify as capital.

The preferred shares rank senior to the Company's common stock with respect to the payment of dividends and liquidation rights. Holders of the preferred shares are entitled to receive non-cumulative cash dividends, when, as and if declared by the Board of Directors, from the original issue date, semi-annually in arrears on the first day of June and December of each year. The Company accrues dividends when they are declared by the Board of Directors. To the extent declared, these dividends will accrue, on the liquidation preference of $1,000 per share, at a fixed annual rate of 6.00% from the original issue date to

June 1, 2025. After June 1, 2025, the dividend rate will reset every five years and accrue at an annual rate equal to the five-year U.S. Treasury Rate as of two business days prior to the reset date, plus 5.662%. Dividends will not be cumulative and will not be mandatory. Accordingly, if dividends are not declared for any dividend period, then dividends for that dividend period will not accrue and will not be payable.

For both years ended December 31, 2022 and 2021, the Company declared and paid dividends on preferred shares of $36.0 million, or $60.00 per share.

c) The following table presents net income (loss) per common share and diluted net income (loss) per common share.

	Years Ended December 31,
(in thousands, except per share amounts)	2022		2021		2020
Net income (loss) to common shareholders	$	(250,123)	$	2,389,003	$	797,630
Adjustment of redeemable noncontrolling interests	(69,896)		46,874		(28,705)
Adjusted net income (loss) to common shareholders	$	(320,019)	$	2,435,877	$	768,925
Basic common shares outstanding	13,580		13,768		13,811
Dilutive potential common shares from restricted stock units and restricted stock (1) (2)	—		32		12
Diluted common shares outstanding	13,580		13,800		13,823
Basic net income (loss) per common share	$	(23.57)	$	176.92	$	55.67
Diluted net income (loss) per common share (1) (2)	$	(23.57)	$	176.51	$	55.63

(1)    The Company has issued grants and awards of restricted stock units to employees as performance, retention or hiring incentives, as well as awards of restricted stock to non-employee directors, under its equity incentive compensation plan. At December 31, 2022, there were 116,431 shares available for future awards under the Company's equity incentive compensation plan.

(2)    The impact of 33 thousand shares from restricted stock units and restricted stock was excluded from the computation of diluted net loss per common share for the year ended December 31, 2022 because the effect would have been anti-dilutive.

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Other Comprehensive Income

12 Months Ended

Dec. 31, 2022

Other Comprehensive Income (Loss), Tax [Abstract]

Other Comprehensive Income

Other Comprehensive Income

Other comprehensive income includes changes in net unrealized gains (losses) on available-for-sale investments, which is comprised of net holding gains (losses) arising during the period, changes in unrealized other-than-temporary impairment losses, if any, and reclassification adjustments for net realized gains included in net income. Other comprehensive income also includes changes in foreign currency translation adjustments and changes in net actuarial pension loss. The following table presents the change in accumulated other comprehensive income (loss) by component, net of noncontrolling interests.

(dollars in thousands)	Unrealized Gains (Losses) on Available-for-Sale Investments		Foreign Currency		Net Actuarial Pension Loss		Accumulated other comprehensive income (loss)
December 31, 2019	$	346,037	$	(86,249)	$	(51,016)	$	208,772
Total other comprehensive income (loss) before income taxes	442,089		29,829		(8,849)		463,069
Income tax (expense) benefit	(89,316)		—		1,851		(87,465)
Total other comprehensive income (loss)	352,773		29,829		(6,998)		375,604
December 31, 2020	$	698,810	$	(56,420)	$	(58,014)	$	584,376
Total other comprehensive income (loss) before income taxes	(450,096)		(2,091)		10,663		(441,524)
Income tax (expense) benefit	95,158		1,880		(2,273)		94,765
Total other comprehensive income (loss)	(354,938)		(211)		8,390		(346,759)
December 31, 2021	$	343,872	$	(56,631)	$	(49,624)	$	237,617
Total other comprehensive income (loss) before income taxes	(1,407,316)		(9,677)		31,222		(1,385,771)
Income tax (expense) benefit	297,168		401		(6,492)		291,077
Total other comprehensive income (loss)	(1,110,148)		(9,276)		24,730		(1,094,694)
December 31, 2022	$	(766,276)	$	(65,907)	$	(24,894)	$	(857,077)

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Commitments And Contingencies

12 Months Ended

Dec. 31, 2022

Commitments and Contingencies Disclosure [Abstract]

Commitments And Contingencies

Commitments and Contingencies

a) In March 2022, the Company completed a buy-out transaction with Markel CATCo Re and the Markel CATCo Funds, which are currently in run-off, that provided for an accelerated return of all remaining capital to investors in the Markel CATCo Funds. Under the terms of the transaction, the Company provided cash funding of $45.1 million to purchase substantially all of the Markel CATCo Funds' investments in Markel CATCo Re and also provided tail risk cover of $142.7 million to Markel CATCo Re to allow for the release of collateral to investors. In order to complete the transaction, the Company also made $101.9 million in additional payments, net of insurance proceeds, to or for the benefit of investors, which were recognized as an expense to the Company and included in services and other expenses for the year ended December 31, 2022. In conjunction with the buy-out transaction, all investors holding securities in the Markel CATCo Funds, the Markel CATCo Group Companies (MCIM, the Markel CATCo Funds and Markel CATCo Re), Markel Corporation and each of their related parties, among others, granted mutual releases of all claims related to the transaction, the Markel CATCo Group Companies' businesses and the investors' investments in the Funds, including any pending litigation. See note 17 for further details about the Company's Markel CATCo operations and the buy-out transaction.

b) Contingencies arise in the normal course of the Company's operations and are not expected to have a material impact on the Company's financial condition or results of operations.

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Statutory Financial Information

12 Months Ended

Dec. 31, 2022

Statutory Financial Information [Abstract]

Statutory Financial Information

Statutory Financial Information

a) The following table summarizes statutory capital and surplus for the Company's insurance subsidiaries.

	December 31,
(dollars in thousands)	2022		2021
United States	$	5,236,793	$	4,493,310
United Kingdom	$	749,495	$	736,575
Bermuda	$	1,895,132	$	2,106,606
Germany	$	125,194	$	95,693

As of December 31, 2022, the Company's actual statutory capital and surplus significantly exceeded the regulatory requirements. As a result, the amount of statutory capital and surplus necessary to satisfy regulatory requirements is not significant in relation to actual statutory capital and surplus.

The following table summarizes statutory net income (loss) for the Company's insurance subsidiaries.

	Years Ended December 31,
(dollars in thousands)	2022		2021		2020
United States	$	689,341	$	705,908	$	616,135
United Kingdom	$	35,719	$	56,546	$	(25,776)
Bermuda	$	(144,239)	$	556,275	$	228,740
Germany	$	(2,471)	$	1,780	$	(4,628)

Amounts presented for the Company's U.S. insurance subsidiaries have been calculated in accordance with prescribed statutory accounting rules. For the Company's international insurance subsidiaries, the regulations that govern the calculation of statutory capital and surplus do not provide requirements for the calculation of net income. Rather, such amounts are reported in accordance with a basis of accounting permitted by their respective regulator. Amounts presented for the Company's U.K., Bermuda and German insurance subsidiaries have been calculated in accordance with U.K. GAAP, U.S. GAAP and German GAAP, respectively.

United States

The laws of the domicile states of the Company's U.S. insurance subsidiaries govern the amount of dividends that may be paid to the Company. Generally, statutes in the domicile states of the Company's U.S. insurance subsidiaries require prior approval for payment of extraordinary, as opposed to ordinary, dividends. As of December 31, 2022, the Company's U.S. insurance

subsidiaries could pay up to $655.6 million to the holding company during the following 12 months under the ordinary dividend regulations.

In converting from U.S. statutory accounting principles to U.S. GAAP, typical adjustments include deferral of policy acquisition costs, differences in the calculation of deferred income taxes and the inclusion of net unrealized gains or losses relating to fixed maturity securities in shareholders' equity. The Company does not use any permitted statutory accounting practices that are different from prescribed statutory accounting practices which impact statutory capital and surplus.

United Kingdom

The Company's U.K. insurance subsidiary, Markel International Insurance Company Limited (MIICL), and its Lloyd's managing agent, Markel Syndicate Management Limited (MSM), are authorized by the Prudential Regulation Authority (PRA) and regulated by both the PRA and the Financial Conduct Authority (FCA). The PRA oversees compliance with established periodic auditing and reporting requirements, minimum solvency margins and individual capital assessment requirements under the Solvency II Directive (Solvency II) and imposes dividend restrictions, while both the PRA and the FCA oversee compliance with risk assessment reviews and various other requirements. MIICL is required to give advance notice to the PRA for any transaction or proposed transaction with a connected or related person. MSM is required to satisfy the solvency requirements of Lloyd's. In addition, the Company's U.K. subsidiaries must comply with the United Kingdom Companies Act of 2006, which provides that dividends may only be paid out of profits available for that purpose. Earnings of the Company's U.K. insurance subsidiaries are available for distribution to the holding company to the extent not otherwise restricted.

Bermuda

The Company's Bermuda insurance subsidiary, Markel Bermuda Limited (MBL), is subject to enhanced capital requirements in addition to minimum solvency and liquidity requirements. The enhanced capital requirement is determined by reference to a risk-based capital model that determines a control threshold for statutory capital and surplus by taking into account the risk characteristics of different aspects of the insurer's business. At December 31, 2022, MBL satisfied both the enhanced capital requirements and the minimum solvency and liquidity requirements.

Under the Bermuda Insurance Act, MBL is prohibited from paying or declaring dividends during a fiscal year if it is in breach of its enhanced capital requirement, solvency margin or minimum liquidity ratio or if the declaration or payment of the dividend would cause a breach of those requirements. If an insurer fails to meet its solvency margin or minimum liquidity ratio on the last day of any financial year, it is prohibited from declaring or paying any dividends during the next financial year without the approval of the Bermuda Monetary Authority (BMA). Further, MBL is prohibited from declaring or paying, in any financial year, dividends of more than 25% of its total statutory capital and surplus as set forth in its previous year's statutory balance sheet unless at least seven days before payment of those dividends it files with the BMA an affidavit stating that it will continue to meet its solvency margin and minimum liquidity ratio. MBL must obtain the BMA's prior approval for a reduction by 15% or more of the total statutory capital as set forth in its previous year's financial statements. In addition, as a long-term insurer, MBL may not declare or pay a dividend to any person other than a policyholder unless the value of the assets in its long-term business fund, as certified by MBL's approved actuary, exceeds the liabilities of its long-term business. The amount of the dividend cannot exceed the aggregate of that excess and any other funds legally available for the payment of the dividend. As of December 31, 2022, MBL could pay up to $473.8 million to the holding company during the following 12 months without making any additional filings with the BMA.

Germany

The Company's German insurance subsidiary, Markel Insurance SE, is regulated by the Federal Financial Conduct Authority in Germany and is also subject to capital and solvency requirements under Solvency II.

b) Lloyd's sets the corporate members' required capital annually based on each syndicates' business plans, rating environment, reserving environment and input arising from Lloyd's discussions with, among others, regulatory and rating agencies. Such required capital is referred to as Funds at Lloyd's (FAL) and comprises cash and investments. The amount of cash and investments held as FAL as of December 31, 2022 was $873.0 million. Of this amount, $335.4 million was provided by the holding company and is not available for general use by the Company. The remaining amount, provided by the Company's insurance subsidiaries, is not available for distribution to the holding company. The Company's corporate member may also be required to maintain funds under the control of Lloyd's in excess of its capital requirements and such funds also may not be available for distribution to the holding company.

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Markel Corporation (Parent Company Only) Financial Information

12 Months Ended

Dec. 31, 2022

Condensed Financial Information Disclosure [Abstract]

Markel Corporation (Parent Company Only) Financial Information

Markel Corporation (Parent Company Only) Financial Information

The following parent company only condensed financial information reflects the financial position, results of operations and cash flows of Markel Corporation.

CONDENSED BALANCE SHEETS

	December 31,
	2022		2021
	(dollars in thousands)
ASSETS
Investments, at estimated fair value:
Fixed maturity securities, available-for-sale (amortized cost of $164,100 in 2022 and $210,111 in 2021)	$	154,039	$	228,705
Equity securities (cost of $1,107,796 in 2022 and $1,771,597 in 2021)	1,473,116		2,784,189
Short-term investments, available-for-sale (estimated fair value approximates cost)	1,436,387		1,474,997
Total Investments	3,063,542		4,487,891
Cash and cash equivalents	594,101		763,985
Restricted cash and cash equivalents	21,146		15,485
Receivables	13,070		18,770
Investments in consolidated subsidiaries	12,905,353		13,298,971
Notes receivable from subsidiaries	60,111		135,756
Income taxes receivable	—		48,344
Other assets	445,875		408,161
Total Assets	$	17,103,198	$	19,177,363
LIABILITIES AND SHAREHOLDERS' EQUITY
Senior long-term debt	$	3,686,892	$	4,034,223
Notes payable to subsidiaries	—		32,753
Income taxes payable	120,616		—
Net deferred tax liability	148,365		295,289
Other liabilities	81,791		97,748
Total Liabilities	4,037,664		4,460,013
Shareholders' equity:
Preferred stock	591,891		591,891
Common stock	3,493,893		3,441,079
Retained earnings	9,836,827		10,446,763
Accumulated other comprehensive income (loss)	(857,077)		237,617
Total Shareholders' Equity	13,065,534		14,717,350
Total Liabilities and Shareholders' Equity	$	17,103,198	$	19,177,363

CONDENSED STATEMENTS OF INCOME (LOSS) AND COMPREHENSIVE INCOME (LOSS)

	Years Ended December 31,
	2022		2021		2020
	(dollars in thousands)
REVENUES
Net investment income	$	34,781	$	9,099	$	22,037
Dividends on common stock of consolidated subsidiaries	278,557		1,081,988		466,244
Net investment gains (losses):
Net realized investment gains	7,620		23,652		27,774
Change in fair value of equity securities	(397,906)		514,727		82,389
Net investment gains (losses)	(390,286)		538,379		110,163
Gain on sale of subsidiary	107,293		—		—
Other revenues (losses)	(29,487)		11,078		(4,011)
Total Revenues	858		1,640,544		594,433
EXPENSES
Services and other expenses	111,848		22,379		1,025
Interest expense	172,125		185,568		187,562
Net foreign exchange losses (gains)	(13,143)		(6,236)		6,823
Total Expenses	270,830		201,711		195,410
Income (Loss) Before Equity in Undistributed Earnings (Losses) of Consolidated Subsidiaries and Income Taxes	(269,972)		1,438,833		399,023
Equity in undistributed earnings (losses) of consolidated subsidiaries	(69,971)		1,081,976		400,289
Income tax (expense) benefit	125,820		(95,806)		16,718
Net Income (Loss) to Shareholders	(214,123)		2,425,003		816,030
Preferred stock dividends	(36,000)		(36,000)		(18,400)
Net Income (Loss) to Common Shareholders	$	(250,123)	$	2,389,003	$	797,630
OTHER COMPREHENSIVE INCOME (LOSS) TO SHAREHOLDERS
Change in net unrealized gains (losses) on available-for-sale investments, net of taxes:
Net holding gains (losses) arising during the period	$	(24,465)	$	(5,885)	$	21,482
Consolidated subsidiaries' net holding gains (losses) arising during the period	(1,130,589)		(342,430)		334,677
Reclassification adjustments for net gains (losses) included in net income (loss) to shareholders	1,965		(34)		(14,937)
Consolidated subsidiaries' reclassification adjustments for net gains (losses) included in net income (loss) to shareholders	42,941		(6,589)		11,551
Change in net unrealized gains (losses) on available-for-sale investments, net of taxes	(1,110,148)		(354,938)		352,773
Consolidated subsidiaries' change in foreign currency translation adjustments, net of taxes	(9,276)		(211)		29,829
Consolidated subsidiaries' change in net actuarial pension loss, net of taxes	24,730		8,390		(6,998)
Total Other Comprehensive Income (Loss) to Shareholders	(1,094,694)		(346,759)		375,604
Comprehensive Income (Loss) to Shareholders	$	(1,308,817)	$	2,078,244	$	1,191,634

CONDENSED STATEMENTS OF CASH FLOWS

	Years Ended December 31,
	2022		2021		2020
	(dollars in thousands)
OPERATING ACTIVITIES
Net income (loss) to shareholders	$	(214,123)	$	2,425,003	$	816,030
Adjustments to reconcile net income (loss) to shareholders to net cash provided by operating activities	487,259		(2,213,261)		(708,162)
Net Cash Provided By Operating Activities	273,136		211,742		107,868
INVESTING ACTIVITIES
Proceeds from sales, maturities, calls and prepayments of fixed maturity securities	13,047		37,607		319,502
Proceeds from sales of equity securities	65,379		105,700		276,637
Cost of equity securities purchased	(16,660)		(73,644)		(90,459)
Net change in short-term investments	58,970		(224,646)		(522,666)
Return of capital from subsidiaries	—		17,193		15,164
Decrease (increase) in notes receivable due from subsidiaries	75,645		(50,000)		(25,000)
Capital contributions to subsidiaries (1)	(94,585)		(271,729)		(605,426)
Proceeds from sale of subsidiary	165,615		—		—
Cost of equity method investments	—		(38,550)		(4,917)
Other	4,779		(5,368)		17,984
Net Cash Provided (Used) By Investing Activities	272,190		(503,437)		(619,181)
FINANCING ACTIVITIES
Repayment of senior long-term debt	(350,000)		—		—
Additions to senior long-term debt	—		591,354		—
Decrease in notes payable to subsidiaries	(32,753)		—		(50,000)
Repurchases of common stock	(290,796)		(206,518)		(26,832)
Issuance of preferred stock, net	—		—		591,891
Dividends paid on preferred stock	(36,000)		(36,000)		(18,400)
Other	—		(1,181)		15
Net Cash Provided (Used) By Financing Activities	(709,549)		347,655		496,674
Increase (decrease) in cash, cash equivalents, restricted cash and restricted cash equivalents	(164,223)		55,960		(14,639)
Cash, cash equivalents, restricted cash and restricted cash equivalents at beginning of year	779,470		723,510		738,149
CASH, CASH EQUIVALENTS, RESTRICTED CASH AND RESTRICTED CASH EQUIVALENTS AT END OF YEAR	$	615,247	$	779,470	$	723,510

(1)    The holding company made non-cash capital contributions in the form of investments to its subsidiaries totaling $924.0 million and $49.5 million for the years ended December 31, 2022 and 2020, respectively. There were no non-cash capital contributions made to subsidiaries for the year ended December 31, 2021.

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Accounting Changes and Error Corrections	Jan. 01, 2020
Accounting Changes and Error Corrections [Abstract]
Immaterial Correction to Prior Period Financial Statements for Accounting Policy Change	Immaterial Correction to Prior Period Financial Statements for Accounting Policy ChangeThe Company defers and amortizes costs directly related to the successful acquisition of new or renewal insurance contracts over the related policy period, generally one year. Previously, the Company did not defer salaries and benefits associated with the successful acquisition of insurance contracts, as such amounts were quantified and assessed each period and were deemed not to be material to the consolidated financial statements. Effective January 1, 2022, the Company changed its accounting policy to defer salaries and benefits associated with the successful acquisition of insurance contracts in accordance with the requirements of FASB ASC 944, Financial Services–Insurance. To reflect the change in accounting policy, the Company made a cumulative adjustment to increase deferred policy acquisition costs by $28.2 million, increase deferred tax liabilities by $5.9 million and increase retained earnings by $22.3 million as of January 1, 2020, which is the beginning of the earliest year presented in the consolidated financial statements included herein. These increases in deferred policy acquisition costs, deferred tax liabilities and retained earnings are reflected as increases to the previously reported amounts in the Company's consolidated balance sheet as of December 31, 2021 and as an adjustment to retained earnings as of January 1, 2020 in the accompanying consolidated statement of changes in equity for the year ended December 31, 2020. The Company considered both the quantitative and qualitative factors within the provisions of U.S. Securities and Exchange Commission Staff Accounting Bulletin (SAB) No. 99, Materiality, and SAB No. 108, Considering the Effect of Prior Year Misstatements when Quantifying Misstatements in Current Year Financial Statements and determined that the impact of the change in accounting policy was not material to the Company's previously issued consolidated financial statements. The Company did not adjust the amounts previously presented in the consolidated statements of income and comprehensive income for the years ended December 31, 2020 and 2021 for the change in accounting policy as the effects were not material. The cumulative income statement effect for those periods was included in the consolidated statement of loss and comprehensive loss for the year ended December 31, 2022.

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Summary Of Significant Accounting Policies (Policy)

12 Months Ended

Dec. 31, 2022

Accounting Policies [Abstract]

Basis of Presentation

Basis of Presentation. The accompanying consolidated financial statements have been prepared in accordance with United States (U.S.) generally accepted accounting principles (GAAP) and include the accounts of Markel Corporation and its consolidated subsidiaries, as well as any variable interest entities (VIEs) that meet the requirements for consolidation (the Company). All significant intercompany balances and transactions have been eliminated in consolidation. The Company consolidates the results of its Markel Ventures subsidiaries on a one-month lag, with the exception of significant transactions or events that occur during the intervening period. Certain prior period amounts have been reclassified to conform to the current period presentation.

Use of Estimates

Use of Estimates. The preparation of financial statements in accordance with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenues and expenses and the disclosure of contingent assets and liabilities. Management periodically reviews its estimates and assumptions. Quarterly reviews include evaluating the adequacy of reserves for unpaid losses and loss adjustment expenses and contingencies. Estimates and assumptions for goodwill and intangible assets are reviewed in conjunction with an acquisition, and goodwill and indefinite-lived intangible assets are reassessed at least annually for impairment. Actual results may differ materially from the estimates and assumptions used in preparing the consolidated financial statements.

Investments

Investments. Available-for-sale investments and equity securities are recorded at estimated fair value. Available-for-sale investments include fixed maturity securities and short-term investments. Fixed maturity securities include government and municipal bonds and mortgage-backed securities with original maturities of more than one year. Short-term investments include certificates of deposit, commercial paper, discount notes and treasury bills with original maturities of one year or less. Unrealized gains and losses on available-for-sale investments, net of income taxes, are included in other comprehensive income. Unrealized gains and losses on equity securities, net of income taxes, are included in net income as net investment gains or losses. The Company completes a detailed analysis each quarter to assess declines in the fair value of its available-for-sale investments. Any impairment losses on the Company's available-for-sale investments are recorded as an allowance, subject to reversal.

Premiums and discounts are amortized or accreted over the lives of the related fixed maturity securities as an adjustment to the yield using the effective interest method. Dividend and interest income are recognized when earned. Accrued interest receivable is excluded from both the estimated fair value and the amortized cost basis of available-for-sale securities and included within other assets on the Company's consolidated balance sheets. Any uncollectible accrued interest receivable is written off in the period it is deemed uncollectible. Realized investment gains or losses on available-for-sale investments are included in net income. Realized gains or losses from sales of available-for-sale investments are derived using the first-in, first-out method on the trade date.

See note 4 and note 5 for further details regarding the Company's investment portfolio.

Cash and Cash Equivalents

Cash and Cash Equivalents. The Company considers all investments with original maturities of 90 days or less to be cash equivalents. The carrying value of the Company's cash and cash equivalents approximates fair value.

Restricted Cash and Cash Equivalents

Restricted Cash and Cash Equivalents. Cash and cash equivalents that are restricted as to withdrawal or use are recorded as restricted cash and cash equivalents. The carrying value of the Company's restricted cash and cash equivalents approximates fair value.

Receivables

Receivables. Receivables include amounts receivable from agents, brokers and insureds, which represent premiums that are both currently due and amounts not yet due on insurance and reinsurance policies. Premiums for insurance policies are generally due at inception. Premiums for reinsurance policies generally become due over the period of coverage based on the policy terms. Changes in the estimate of reinsurance premiums written will result in an adjustment to premiums receivable in

the period they are determined. Receivables also include amounts receivable from contracts with customers, which represent the Company's unconditional right to consideration for satisfying the performance obligations outlined in the contract.

The Company monitors credit risk associated with receivables, taking into consideration the fact that in certain instances in the Company's insurance operations credit risk may be reduced by the Company's right to offset loss obligations or unearned premiums against premiums receivable. An allowance is established for credit losses expected to be incurred over the life of the receivable, which is recorded net of this allowance. The allowance is charged to net income in the period the receivable is recorded and revised in subsequent periods to reflect changes in the Company's estimate of expected credit losses. See note 7 for further details regarding receivables.

Reinsurance Recoverables

Reinsurance Recoverables. Amounts recoverable from reinsurers are estimated in a manner consistent with the claim liability associated with the reinsured business. The Company evaluates the financial condition of its reinsurers and monitors concentration of credit risk to minimize its exposure to significant losses from individual reinsurers. To further reduce credit exposure on reinsurance recoverables, the Company has received collateral, including letters of credit and trust accounts, from certain reinsurers. Cash collateral related to these reinsurance agreements is available, without restriction, when the Company pays losses covered by the reinsurance agreements. An allowance is established for credit losses expected to be incurred over the life of the reinsurance recoverable, which is recorded net of this allowance. The allowance is charged to net income in the period the recoverable is recorded and revised in subsequent periods to reflect changes in the Company's estimate of expected credit losses. As of December 31, 2022 and 2021, the allowance for credit losses associated with the Company's reinsurance recoverables was not material to the consolidated financial statements.

Deferred Policy Acquisition Costs

Deferred Policy Acquisition Costs. Costs directly related to the acquisition of insurance premiums are deferred and amortized over the related policy period, generally one year. The Company only defers acquisition costs incurred that are related directly to the successful acquisition of new or renewal insurance contracts, including commissions to agents and brokers, salaries and benefits and premium taxes. Commissions received related to reinsurance premiums ceded are netted against broker commissions in determining acquisition costs eligible for deferral. To the extent that future policy revenues on existing policies are not adequate to cover related costs and expenses, deferred policy acquisition costs are charged to earnings. The Company does not consider anticipated investment income in determining whether a premium deficiency exists. See note 2(a) and (f) for further details regarding policy acquisition costs, as well as note 24 for details regarding a change to the Company's policy for accounting for deferred policy acquisition costs.

Goodwill and Intangible Assets

Goodwill and Intangible Assets. Goodwill and intangible assets are recorded as a result of business acquisitions. Goodwill represents the excess of the amount paid to acquire a business over the net fair value of assets acquired and liabilities assumed at the date of acquisition. Indefinite-lived and other intangible assets are recorded at fair value as of the acquisition date. The determination of the fair value of certain assets acquired and liabilities assumed involves significant judgment and the use of valuation models and other estimates, which require assumptions that are inherently subjective. Goodwill and indefinite-lived intangible assets are tested for impairment at least annually. The Company completes an annual test during the fourth quarter of each year based upon the results of operations through September 30. Intangible assets with definite lives are amortized using the straight-line method over their estimated useful lives, generally five to 20 years, and are reviewed for impairment when events or circumstances indicate that their carrying value may not be recoverable. See note 8 for further details regarding goodwill and intangible assets.

Equity Method Investments

Equity Method Investments. The Company holds certain investments that are required to be accounted for under the equity method, whereby they initially are recorded at cost within other assets on the consolidated balance sheets and subsequently increased or decreased by the Company's proportionate share of the net income or loss of the investee and other transactions impacting the investee's equity. The Company records its proportionate share of net income or loss of the investee in services and other revenues. The Company records its proportionate share of other comprehensive income or loss of the investee as a component of other comprehensive income. Dividends or other equity distributions in excess of the Company's cumulative equity in earnings of the investee are recorded as a reduction of the investment. The Company reviews equity method investments for impairment when events or circumstances indicate that a decline in the fair value of the investment below its carrying value is other-than-temporary. See note 6 for further details regarding the Company's equity method investments.

Property and Equipment

Property and Equipment. Property and equipment is maintained primarily by certain of the Company's Markel Ventures businesses and is stated at cost less accumulated depreciation. Depreciation of property and equipment is calculated using the straight-line method over the estimated useful lives of the respective assets. Property and equipment, net of accumulated depreciation, was $1.2 billion and $1.1 billion as of December 31, 2022 and 2021, respectively, and is included in other assets on the Company's consolidated balance sheets.

Leases

Leases. The present value of future lease payments for the Company's leases with terms greater than 12 months is included on the consolidated balance sheets as lease liabilities and right-of-use lease assets.

The Company's lease portfolio primarily consists of operating leases for real estate. Total expected lease payments are based on the lease payments specified in the contract and the stated term, including any options to extend or terminate that the Company is reasonably certain to exercise. The Company accounts for lease components and any associated non-lease components within a contract as a single lease component, and therefore allocates all of the expected lease payments to the lease component.

The lease liability, which represents the Company's contractual obligation to make lease payments, is calculated based on the present value of expected lease payments over the remaining lease term, discounted using the Company's collateralized incremental borrowing rate at the lease commencement date. The lease liability is then adjusted for any prepaid rent, lease incentives received or capitalized initial direct costs to determine the lease asset, which represents the Company's right to use the underlying asset for the lease term. Lease liabilities and lease assets are included in other liabilities and other assets, respectively, on the Company's consolidated balance sheets.

Total lease costs are primarily comprised of rental expense for operating leases, which is recognized on a straight line basis over the lease term. Rental expense attributable to the Company's underwriting operations is included in underwriting, acquisition and insurance expenses and rental expense attributable to the Company's other operations is included in products expenses and services and other expenses in the consolidated statements of income and comprehensive income. See note 9 for further details regarding leases.

Inventories

Inventories. Inventories are maintained at certain of the Company's Markel Ventures businesses and consist primarily of raw materials, work-in-process and finished goods. Inventories are generally valued using the first-in-first-out method and stated at the lower of cost or net realizable value. Inventories were $639.6 million and $529.3 million as of December 31, 2022 and 2021, respectively, and are included in other assets on the Company's consolidated balance sheets.

Redeemable Noncontrolling Interests

Redeemable Noncontrolling Interests. The Company owns controlling interests in various companies through its Markel Ventures operations. In some cases, the Company has the option to acquire the remaining equity interests, and the remaining equity interests have the option to sell their interests to the Company, in the future. The redemption value of the remaining equity interests is generally based on the respective company's earnings in specified periods preceding the redemption date. The redeemable noncontrolling interests are currently redeemable or become redeemable between 2023 and 2032.The Company recognizes changes in the redemption value that exceed the carrying value of redeemable noncontrolling interests to retained earnings as if the balance sheet date was also the redemption date. Changes in the redemption value also result in an adjustment to net income to common shareholders in the calculation of basic and diluted net income per common share. See note 19 for further details regarding the calculation of basic and diluted net income per common share.

Income Taxes

Income Taxes. The Company records deferred income taxes to reflect the net tax effect of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and their tax bases. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in years in which those temporary differences are expected to be recovered or settled. Deferred tax assets are reduced by a valuation allowance when management believes it is more likely than not that some, or all, of the deferred tax assets will not be realized. The Company recognizes the tax benefit from an uncertain tax position taken or expected to be taken in income tax returns only if it is more likely than not that the tax position will be sustained upon examination by tax authorities, based on the technical merits of the position. Tax positions that meet the more likely than not threshold are then measured using a probability weighted approach, whereby the largest amount of tax benefit that is greater than 50% likely of being realized upon ultimate settlement is recognized. The Company recognizes interest and penalties related to uncertain tax positions in income tax expense. See note 15 for further details regarding income taxes.

Unpaid Losses and Loss Adjustment Expenses

Unpaid Losses and Loss Adjustment Expenses. Unpaid losses and loss adjustment expenses on the Company's property and casualty insurance business are based on evaluations of reported claims and estimates for losses and loss adjustment expenses incurred but not reported. Estimates for losses and loss adjustment expenses incurred but not reported are based on reserve development studies, among other things. Recorded reserves are estimates, and the ultimate liability may be greater or less than the estimates. See note 11 for further details regarding unpaid losses and loss adjustment expenses.

Life and Annuity Benefits

Life and Annuity Benefits. The Company has a run-off block of life and annuity reinsurance contracts that subject the Company to mortality, longevity and morbidity risks. The assumptions used to determine policy benefit reserves are generally locked-in for the life of the contract unless an unlocking event occurs. To the extent existing policy reserves, together with the present value of future gross premiums and expected investment income earned thereon, are not adequate to cover the present value of future benefits, settlement and maintenance costs, the locked-in assumptions are revised to current best estimate assumptions and a charge to earnings for life and annuity benefits is recognized at that time. Because of the assumptions and estimates used in establishing reserves for life and annuity benefit obligations and the long-term nature of these reinsurance contracts, the ultimate liability may be greater or less than the estimates. Results attributable to the run-off of life and annuity reinsurance contracts are included in services and other revenues and services and other expenses in the Company's consolidated statements of income and comprehensive income. Investment income earned on the investments that support the policy benefit reserves are included in net investment income. See note 13 for further details regarding life and annuity benefits and note 1(x) for information on changes to the accounting for life and annuity benefits beginning in 2023.

Revenue Recognition

Revenue Recognition.

Property and Casualty Premiums

Insurance premiums written are generally recorded at the inception of a policy and earned on a pro rata basis over the policy period, typically one year. The cost of reinsurance ceded is initially recorded as prepaid reinsurance premiums and is amortized over the reinsurance contract period in proportion to the amount of insurance protection provided. Premiums ceded are netted against premiums written. For multi-year contracts where insurance premiums are payable in annual installments, written premiums are recorded at the inception of the contract based on management's best estimate of total premiums to be received. For contracts where the cedent has the ability to unilaterally commute or cancel coverage within the term of the policy, premiums are generally recorded on an annual basis or up to the contract cancellation point. The remaining premiums are estimated and included as written at each successive anniversary date within the multi-year term.

Assumed reinsurance premiums are recorded at the inception of each contract based upon contract terms and information received from cedents and brokers and are earned on a pro rata basis over the coverage period, or for multi-year contracts, in proportion with the underlying risk exposure to the extent there is variability in the exposure through the coverage period. Changes in reinsurance premium estimates are expected and may result in significant adjustments in any period. These estimates change over time as additional information regarding changes in underlying exposures is obtained. Any subsequent differences arising on such estimates are recorded as premiums written in the period they are determined and are earned on a pro rata basis over the coverage period, or immediately if the coverage period has ended. The Company uses the periodic method to account for assumed reinsurance from foreign reinsurers as a result of the sufficiency of the information provided by the reinsurer, which is consistent with its accounting for assumed reinsurance from U.S. reinsurers.

Certain contracts that the Company writes provide for reinstatement of coverage. Reinstatement premiums are the premiums for the restoration of the insurance or reinsurance limit of a contract to its full amount after a loss occurrence by the insured or reinsured. The Company accrues for reinstatement premiums resulting from losses recorded. Such accruals are based upon contractual terms and management judgment is involved with respect to the amount of losses recorded. Changes in estimates of losses recorded on contracts with reinstatement premium features will result in changes in reinstatement premiums based on contractual terms. Reinstatement premiums are recognized at the time losses are recorded and are generally earned on a pro rata basis over the remaining coverage period.

Other Revenues

Other revenues primarily relate to the Company's Markel Ventures, insurance-linked securities (ILS) and program services operations and consist of revenues from the sale of products and services. Revenues are recognized when, or as, control of the promised goods or services is transferred to the Company's customers, in an amount that reflects the consideration the Company expects to be entitled to in exchange for those goods or services. Contracts with customers generally have an original term of one year or less. For contracts with customers that have an original term greater than one year, the Company recognizes revenue at the amount for which it has a right to invoice for the products delivered or services performed. Certain customers may receive volume rebates or credits for products and services, which are accounted for as variable consideration. The Company estimates these amounts based on the expected amount to be provided to the customer and reduces revenues recognized by a corresponding amount. The Company does not expect significant changes to its estimates of variable consideration over the term of the contracts.

Payment terms for products and services vary by the type of product or service offered and the location of the customer, and payment is typically received at or shortly after the point of sale. For certain products, the Company requires partial payment

in the form of a deposit before the products are delivered to the customer, which is included in other liabilities on the Company's consolidated balance sheets.

Through its Markel Ventures operations, the Company has several different businesses that manufacture or produce a variety of products, including ornamental plants, precast concrete, equipment used in baking systems, over-the-road transportation equipment, portable dredges, residential homes and flooring for the trucking industry. Most of the Company's product revenues are recognized when the products are shipped to the customer or the products arrive at the agreed upon destination with the end customer. Some of the Company's contracts include multiple performance obligations. For such arrangements, revenues are allocated to each performance obligation based on the relative standalone selling price, which is derived from amounts stated in the contract.

Through its Markel Ventures operations, the Company also has several different businesses that provide various types of services, including distribution of exterior building products, fire protection and life safety services and consulting services. Service revenues are generally recognized over the term of the contracts based on hours incurred or as services are provided.

The Company's other revenues also include investment management fee income and through 2022, managing general agent (MGA) commissions for services provided through the Company's ILS operations. Investment management fee income is recognized over the period in which investment management services are provided and is calculated and recognized monthly, typically based on the net asset value of the accounts managed. For certain accounts, the Company is also entitled to participate, on a fixed-percentage basis, in any net income generated in excess of an agreed-upon threshold as established by the underlying investment management agreements. In general, net income is calculated at the end of each calendar year and incentive fees are payable annually. Incentive fee income is recognized at the conclusion of the contractual performance period, when the uncertainty related to performance has been resolved. MGA commissions are based on the direct written premiums of the insurance contracts placed. Commissions received for these services are generally recognized when the related policy is written.

Program services fees, or ceding fees, received in exchange for providing access to the U.S. property and casualty insurance market are based on the gross premiums written on behalf of general agent and capacity provider clients. Ceding fees are earned in a manner consistent with the recognition of the gross premiums earned on the underlying insurance policies, generally on a pro rata basis over the terms of the underlying policies reinsured.

See note 10 for further details regarding products, services and other revenues.

Other Revenues

Other Revenues

Other revenues primarily relate to the Company's Markel Ventures, insurance-linked securities (ILS) and program services operations and consist of revenues from the sale of products and services. Revenues are recognized when, or as, control of the promised goods or services is transferred to the Company's customers, in an amount that reflects the consideration the Company expects to be entitled to in exchange for those goods or services. Contracts with customers generally have an original term of one year or less. For contracts with customers that have an original term greater than one year, the Company recognizes revenue at the amount for which it has a right to invoice for the products delivered or services performed. Certain customers may receive volume rebates or credits for products and services, which are accounted for as variable consideration. The Company estimates these amounts based on the expected amount to be provided to the customer and reduces revenues recognized by a corresponding amount. The Company does not expect significant changes to its estimates of variable consideration over the term of the contracts.

Payment terms for products and services vary by the type of product or service offered and the location of the customer, and payment is typically received at or shortly after the point of sale. For certain products, the Company requires partial payment

in the form of a deposit before the products are delivered to the customer, which is included in other liabilities on the Company's consolidated balance sheets.

Through its Markel Ventures operations, the Company has several different businesses that manufacture or produce a variety of products, including ornamental plants, precast concrete, equipment used in baking systems, over-the-road transportation equipment, portable dredges, residential homes and flooring for the trucking industry. Most of the Company's product revenues are recognized when the products are shipped to the customer or the products arrive at the agreed upon destination with the end customer. Some of the Company's contracts include multiple performance obligations. For such arrangements, revenues are allocated to each performance obligation based on the relative standalone selling price, which is derived from amounts stated in the contract.

Through its Markel Ventures operations, the Company also has several different businesses that provide various types of services, including distribution of exterior building products, fire protection and life safety services and consulting services. Service revenues are generally recognized over the term of the contracts based on hours incurred or as services are provided.

The Company's other revenues also include investment management fee income and through 2022, managing general agent (MGA) commissions for services provided through the Company's ILS operations. Investment management fee income is recognized over the period in which investment management services are provided and is calculated and recognized monthly, typically based on the net asset value of the accounts managed. For certain accounts, the Company is also entitled to participate, on a fixed-percentage basis, in any net income generated in excess of an agreed-upon threshold as established by the underlying investment management agreements. In general, net income is calculated at the end of each calendar year and incentive fees are payable annually. Incentive fee income is recognized at the conclusion of the contractual performance period, when the uncertainty related to performance has been resolved. MGA commissions are based on the direct written premiums of the insurance contracts placed. Commissions received for these services are generally recognized when the related policy is written.

Program services fees, or ceding fees, received in exchange for providing access to the U.S. property and casualty insurance market are based on the gross premiums written on behalf of general agent and capacity provider clients. Ceding fees are earned in a manner consistent with the recognition of the gross premiums earned on the underlying insurance policies, generally on a pro rata basis over the terms of the underlying policies reinsured.

See note 10 for further details regarding products, services and other revenues.

Program Services

Program Services. In connection with its program services business, the Company enters into contractual agreements with both producing general agents and reinsurers, whereby the general agents and reinsurers are typically obligated to each other for payment of insurance amounts, including premiums, commissions and losses. To the extent these funds are not the obligation of the Company and are settled directly between the general agent and the reinsurer, no receivables or payables are recorded for these amounts. All obligations of the Company's insurance subsidiaries owed to or on behalf of their policyholders are recorded by the Company and, to the extent appropriate, offsetting reinsurance recoverables are recorded.

Foreign Currency Transactions

Foreign Currency Transactions. The U.S. Dollar is the Company's reporting currency and the primary functional currency of its foreign underwriting operations. The functional currencies of the Company's other foreign operations are the currencies of the primary economic environments in which the majority of their business is transacted.

Foreign currency transaction gains and losses are the result of exchange rate changes on transactions denominated in currencies other than the functional currency at each foreign entity. Monetary assets and liabilities are remeasured to the functional currency at current exchange rates, with resulting gains and losses included in net foreign exchange gains within net income. Non-monetary assets and liabilities are remeasured to the functional currency at historic exchange rates. Available-for-sale securities are recorded at fair value with resulting gains and losses, including the portion attributable to movements in exchange rates, included in the change in net unrealized gains on available-for-sale investments, net of taxes within other comprehensive income. While the Company attempts to naturally hedge its exposure to foreign currency fluctuations by matching assets and liabilities in the same currencies, there is a financial statement mismatch between the gains or losses recorded in net income related to insurance reserves denominated in non-functional currencies and the gains or losses recorded in other comprehensive income related to the available-for-sale securities held in non-functional currencies supporting the reserves.

Assets and liabilities of foreign operations denominated in a functional currency other than the U.S. Dollar are translated into the U.S. Dollar at current exchange rates, with resulting gains or losses included, net of taxes, in the change in foreign

currency translation adjustments within other comprehensive income. See note 20 for further details regarding the components of other comprehensive income.

Comprehensive Income

Comprehensive Income. Comprehensive income represents all changes in equity that result from recognized transactions and other economic events during the period. Other comprehensive income refers to revenues, expenses, gains and losses that under U.S. GAAP are included in comprehensive income but excluded from net income, such as unrealized gains or losses on available-for-sale investments, foreign currency translation adjustments and changes in net actuarial pension loss. See note 20 for further details regarding other comprehensive income.

Net Income Per Common Share

Net Income Per Common Share. Basic net income per common share is computed by dividing adjusted net income to shareholders by the weighted average number of common shares outstanding during the year. Diluted net income per common share is computed by dividing adjusted net income to shareholders by the weighted average number of common shares and dilutive potential common shares outstanding during the year. See note 19 for further details regarding the calculation of basic and diluted net income per common share.

Variable Interest Entities

Variable Interest Entities. The Company determines whether it has relationships with entities defined as VIEs in accordance with Financial Accounting Standards Board (FASB) Accounting Standards Codification (ASC) 810, Consolidation. Under this guidance, a VIE is consolidated by the variable interest holder that is determined to be the primary beneficiary.

An entity in which the Company holds a variable interest is a VIE if any of the following conditions exist: (a) the total equity investment at risk is not sufficient to permit the entity to finance its activities without additional subordinated financial support, (b) as a group, the holders of equity investment at risk lack either the direct or indirect ability through voting rights or similar rights to make decisions about an entity's activities that most significantly impact the entity's economic performance or the obligation to absorb the expected losses or right to receive the expected residual returns, or (c) the voting rights of some investors are disproportionate to their obligation to absorb the expected losses of the entity, their rights to receive the expected residual returns of the entity, or both and substantially all of the entity's activities either involve or are conducted on behalf of an investor with disproportionately few voting rights.

The primary beneficiary is defined as the variable interest holder that is determined to have the controlling financial interest as a result of having both (a) the power to direct the activities of a VIE that most significantly impact the economic performance of the VIE and (b) the obligation to absorb losses or right to receive benefits from the VIE that could potentially be significant to the VIE.

The Company determines whether an entity is a VIE at the inception of its variable interest in the entity and upon the occurrence of certain reconsideration events. The Company continually reassesses whether it is the primary beneficiary of VIEs in which it holds a variable interest. See note 17 for further details regarding the Company's involvement with VIEs.

Recent Accounting Pronouncements

Recent Accounting Pronouncements.

Accounting Standards Not Yet Adopted

In August 2018, the FASB issued Accounting Standards Update (ASU) No. 2018-12, Financial Services—Insurance (Topic 944): Targeted Improvements to the Accounting for Long-Duration Contracts. The FASB subsequently issued several ASUs as amendments to ASU No. 2018-12. The standard requires insurance companies with long duration contracts to: (1) review and, if there is a change, update the assumptions used to measure expected cash flows at least annually; (2) update the discount rate assumption at each reporting date; and (3) enhance certain qualitative and quantitative disclosures. ASU No. 2018-12 becomes effective for the Company during the first quarter of 2023 and will be applied using a modified retrospective approach that requires restatement of prior periods presented, including a cumulative adjustment to accumulated other comprehensive income as of January 1, 2021 (the transition date). The standard will, among other things, impact the discount rate used in estimating reserves for the Company's life and annuity reinsurance portfolio, which is in runoff. Currently, the discount rate assumption is locked-in for the life of the contracts, unless there is a loss recognition event. The adoption of ASU 2018-12 will result in a decrease to accumulated other comprehensive income of $15.3 million, net of taxes, as a result of changing the discount rate assumption as of January 1, 2021. However, the cumulative impact of changes in the discount rate assumption through the January 1, 2023 adoption date is based on the discount rate assumption determined as of the adoption date. Based on increases in interest rates between the transition date and the adoption date, the cumulative increase to accumulated other comprehensive income as of January 1, 2023 will be $89.6 million, net of taxes.

In October 2021, the FASB issued ASU No. 2021-08, Business Combinations (Topic 805): Accounting for Contract Assets and Contract Liabilities from Contracts with Customers, which becomes effective for the Company during the first quarter of 2023. ASU No. 2021-08 requires contract assets and liabilities accounted for under FASB ASC 606, Revenue from Contracts with Customers, to be recorded at the acquisition date as if the acquirer entered into those contracts itself on the contract inception dates, rather than at fair value. At adoption, ASU No. 2021-08 will not impact the Company's financial position, results of operations or cash flows, but prospectively, this ASU will impact amounts recorded by the Company for assets acquired and liabilities assumed in conjunction with certain acquisitions.

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Segment Reporting Disclosures (Tables)

12 Months Ended

Dec. 31, 2022

Segment Reporting, Disclosure of Entity's Reportable Segments [Abstract]

Company's Segment Disclosures

The following tables summarize the Company's segment disclosures.

	Year Ended December 31, 2022
(dollars in thousands)	Insurance		Reinsurance		Investing		Markel Ventures		Other (1)		Consolidated
Gross premium volume	$	8,606,700	$	1,229,851	$	—	$	—	$	3,365,131	$	13,201,682
Net written premiums	7,040,176		1,167,312		—		—		(4,098)		8,203,390
Earned premiums	6,528,263		1,063,347		—		—		(3,818)		7,587,792
Losses and loss adjustment expenses:
Current accident year	(3,936,425)		(676,610)		—		—		—		(4,613,035)
Prior accident years	142,924		26,052		—		—		(1,530)		167,446
Underwriting, acquisition and insurance expenses:
Amortization of policy acquisition costs	(1,375,539)		(279,567)		—		—		—		(1,655,106)
Other underwriting expenses	(809,352)		(49,363)		—		—		(1,762)		(860,477)
Underwriting profit (loss)	549,871		83,859		—		—		(7,110)		626,620
Net investment income	—		—		445,846		909		—		446,755
Net investment losses	—		—		(1,595,733)		—		—		(1,595,733)
Products revenues	—		—		—		2,427,096		—		2,427,096
Services and other revenues	—		—		(17,661)		2,329,522		497,564		2,809,425
Products expenses	—		—		—		(2,241,736)		—		(2,241,736)
Services and other expenses	—		—		—		(2,111,510)		(195,125)		(2,306,635)
Amortization of intangible assets (2)	—		—		—		(79,043)		(99,735)		(178,778)
Impairment of goodwill	—		—		—		—		(80,000)		(80,000)
Segment profit (loss)	$	549,871	$	83,859	$	(1,167,548)	$	325,238	$	115,594	$	(92,986)
Interest expense											(196,062)
Net foreign exchange gains											140,209
Loss before income taxes											$	(148,839)

(1)    Other represents the total profit (loss) attributable to the Company's operations that are not included in a reportable segment, as well as amortization of intangible assets attributable to the underwriting segments, which is not allocated between the Insurance and Reinsurance segments.

(2)    Segment profit for the Markel Ventures segment includes amortization of intangible assets attributable to Markel Ventures. Amortization of intangible assets attributable to the Company's underwriting segments, included in Other, was $38.5 million for the year ended December 31, 2022.

	Year Ended December 31, 2021
(dollars in thousands)	Insurance		Reinsurance		Investing		Markel Ventures		Other (1)		Consolidated
Gross premium volume	$	7,239,676	$	1,246,143	$	—	$	—	$	2,952,863	$	11,438,682
Net written premiums	5,998,890		1,126,167		—		—		(5,326)		7,119,731
Earned premiums	5,465,284		1,042,048		—		—		(4,303)		6,503,029
Losses and loss adjustment expenses:
Current accident year	(3,311,185)		(749,815)		—		—		—		(4,061,000)
Prior accident years	506,292		(19,928)		—		—		(6,569)		479,795
Underwriting, acquisition and insurance expenses:
Amortization of policy acquisition costs	(1,153,049)		(266,217)		—		—		—		(1,419,266)
Other underwriting expenses	(810,929)		(61,326)		—		—		(2,218)		(874,473)
Underwriting profit (loss)	696,413		(55,238)		—		—		(13,090)		628,085
Net investment income	—		—		367,406		11		—		367,417
Net investment gains	—		—		1,978,534		—		—		1,978,534
Products revenues	—		—		—		1,712,120		—		1,712,120
Services and other revenues	—		—		7,184		1,931,696		346,445		2,285,325
Products expenses	—		—		—		(1,544,506)		—		(1,544,506)
Services and other expenses	—		109		—		(1,769,201)		(253,843)		(2,022,935)
Amortization of intangible assets (2)	—		—		—		(57,568)		(102,971)		(160,539)
Segment profit (loss)	$	696,413	$	(55,129)	$	2,353,124	$	272,552	$	(23,459)	$	3,243,501
Interest expense											(183,579)
Net foreign exchange gains											72,271
Income before income taxes											$	3,132,193

(1)    Other represents the total profit (loss) attributable to the Company's operations that are not included in a reportable segment, as well as amortization of intangible assets attributable to the underwriting segments, which is not allocated between the Insurance and Reinsurance segments.

(2)    Segment profit for the Markel Ventures segment includes amortization of intangible assets attributable to Markel Ventures. Amortization of intangible assets attributable to the Company's underwriting segments, included in Other, was $41.2 million for the year ended December 31, 2021.

	Year Ended December 31, 2020
(dollars in thousands)	Insurance		Reinsurance		Investing		Markel Ventures		Other (1)		Consolidated
Gross premium volume	$	6,029,024	$	1,130,923	$	—	$	—	$	2,106,718	$	9,266,665
Net written premiums	4,977,662		960,123		—		—		(5,547)		5,932,238
Earned premiums	4,688,448		929,348		—		—		(5,591)		5,612,205
Losses and loss adjustment expenses:
Current accident year	(3,373,085)		(700,240)		—		—		—		(4,073,325)
Prior accident years	554,586		51,755		—		—		23		606,364
Underwriting, acquisition and insurance expenses:
Amortization of policy acquisition costs	(988,668)		(240,493)		—		—		—		(1,229,161)
Other underwriting expenses	(712,280)		(74,379)		—		—		(1,807)		(788,466)
Underwriting profit (loss)	169,001		(34,009)		—		—		(7,375)		127,617
Net investment income	—		—		375,581		245		—		375,826
Net investment gains	—		—		617,979		—		—		617,979
Products revenues	—		—		—		1,439,515		—		1,439,515
Services and other revenues	—		—		(3,996)		1,355,199		338,338		1,689,541
Products expenses	—		—		—		(1,256,159)		—		(1,256,159)
Services and other expenses	—		(41,461)		—		(1,232,150)		(287,509)		(1,561,120)
Amortization of intangible assets (2)	—		—		—		(52,572)		(106,743)		(159,315)
Segment profit (loss)	$	169,001	$	(75,470)	$	989,564	$	254,078	$	(63,289)	$	1,273,884
Interest expense											(177,582)
Net foreign exchange losses											(95,853)
Income before income taxes											$	1,000,449

(1)    Other represents the total profit (loss) attributable to the Company's operations that are not included in a reportable segment, as well as amortization of intangible assets attributable to the underwriting segments, which is not allocated between the Insurance and Reinsurance segments.

(2)    Segment profit for the Markel Ventures segment includes amortization of intangible assets attributable to Markel Ventures. Amortization of intangible assets attributable to the Company's underwriting segments, included in Other, was $41.9 million for the year ended December 31, 2020.

Summary of Additional Measures for Markel Ventures

The following amounts attributable to the Markel Ventures segment are also reviewed, or included in measures reviewed, by the Company's chief operating decision maker.

	Years Ended December 31,
(dollars in thousands)	2022		2021		2020
Depreciation expense	$	102,055	$	72,580	$	60,284
Interest expense (1)	$	46,780	$	35,031	$	46,664
Income tax expense	$	61,588	$	43,626	$	45,815
Capital expenditures	$	225,230	$	124,451	$	75,404

(1)    Interest expense for the years ended December 31, 2022, 2021 and 2020 included intercompany interest expense of $27.4 million, $25.8 million and $32.0 million, respectively, which was eliminated in consolidation.

^[1]

Summary Of Revenues By Segment And By Product

The following table summarizes earned premiums by major product grouping within each underwriting segment.

	Years Ended December 31,
(dollars in thousands)	2022		2021		2020
Insurance segment:
General liability	$	1,927,721	$	1,564,221	$	1,261,411
Professional liability	1,739,983		1,523,536		1,141,034
Property	428,563		362,637		356,934
Marine and energy	585,885		495,897		458,050
Personal lines	489,648		451,095		405,210
Programs	384,952		222,410		238,909
Workers' compensation	385,054		354,337		338,186
Credit and surety	193,701		161,155		151,397
Other products	392,756		329,996		337,317
Total Insurance	6,528,263		5,465,284		4,688,448
Reinsurance segment:
Professional liability	398,839		320,646		243,645
General liability	382,482		314,699		195,468
Specialty	275,033		276,943		298,267
Property	6,993		129,760		191,968
Total Reinsurance	1,063,347		1,042,048		929,348
Other	(3,818)		(4,303)		(5,591)
Total earned premiums	$	7,587,792	$	6,503,029	$	5,612,205

The Company does not manage products at this level of aggregation as it offers a diverse portfolio of products and manages these products in logical groupings within each underwriting segment.

The following table summarizes total products revenues and services and other revenues by major product and service grouping within the Company's Markel Ventures segment.

	Years Ended December 31,
(dollars in thousands)	2022		2021		2020
Products:
Consumer and building	$	1,510,130	$	911,422	$	814,697
Transportation-related	612,467		474,839		351,559
Equipment manufacturing	304,499		325,859		273,259
Total products revenues	2,427,096		1,712,120		1,439,515
Services and other:
Construction	1,910,403		1,554,592		915,696
Consulting	326,549		277,902		283,386
Other	92,570		99,202		156,117
Total services and other revenues	2,329,522		1,931,696		1,355,199
Total products revenues and services and other revenues	$	4,756,618	$	3,643,816	$	2,794,714

The Company does not manage the Markel Ventures portfolio of businesses at this level of aggregation due to the distinct characteristics of each business and the autonomy with which each business operates. Management reviews and assesses the performance of the Markel Ventures businesses in the aggregate at the Markel Ventures segment level, while individual management teams are responsible for developing strategic initiatives, managing day-to-day operations and making investment and capital allocation decisions for their respective companies.

Reconciliation Of Segment Assets To The Company's Consolidated Balance Sheets

The following table reconciles segment assets to the Company's consolidated balance sheets.

	December 31,
(dollars in thousands)	2022		2021
Segment assets:
Investing	$	26,982,280	$	28,277,801
Underwriting	8,853,559		8,111,316
Markel Ventures	5,315,677		4,958,279
Total segment assets	41,151,516		41,347,396
Other operations	8,639,743		7,129,700
Total assets	$	49,791,259	$	48,477,096

Summary Of Deferred Policy Acquisition Costs, Unearned Premiums And Unpaid Losses And Loss Adjustment Expenses

The following table summarizes deferred policy acquisition costs, unearned premiums and unpaid losses and loss adjustment expenses.

(dollars in thousands)	Deferred Policy Acquisition Costs		Unearned Premiums		Unpaid Losses and Loss Adjustment Expenses
December 31, 2022
Insurance segment	$	677,921	$	4,015,252	$	11,616,386
Reinsurance segment	247,562		921,541		3,581,699
Other underwriting	—		9,473		197,602
Total underwriting	925,483		4,946,266		15,395,687
Program services and other fronting	—		1,274,482		5,204,290
Markel CATCo Re (see note 17)	—		—		347,921
Total	$	925,483	$	6,220,748	$	20,947,898
December 31, 2021
Insurance segment	$	574,181	$	3,350,054	$	10,051,994
Reinsurance segment	219,964		802,824		3,639,210
Other underwriting	—		—		271,356
Total underwriting	794,145		4,152,878		13,962,560
Program services and other fronting	—		1,230,741		4,216,334
Total	$	794,145	$	5,383,619	$	18,178,894

[1] Interest expense for the years ended December 31, 2022, 2021 and 2020 included intercompany interest expense of $27.4 million, $25.8 million and $32.0 million, respectively, which was eliminated in consolidation.

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Investments (Tables)

12 Months Ended

Dec. 31, 2022

Investments, Debt and Equity Securities [Abstract]

Available-For-Sale Investments

The following tables summarize the Company's available-for-sale investments. Commercial and residential mortgage-backed securities include securities issued by U.S. government-sponsored enterprises and U.S. government agencies. The net unrealized holding gains (losses) in the tables below are presented before taxes and any reserve deficiency adjustments for life and annuity benefit reserves. See note 13.

	December 31, 2022
(dollars in thousands)	Amortized Cost		Gross Unrealized Holding Gains		Gross Unrealized Holding Losses		Estimated Fair Value
Fixed maturity securities:
U.S. Treasury securities	$	3,050,089	$	2,363	$	(138,493)	$	2,913,959
U.S. government-sponsored enterprises	871,463		154		(106,079)		765,538
Obligations of states, municipalities and political subdivisions	3,973,911		6,503		(247,231)		3,733,183
Foreign governments	1,473,658		2,843		(169,723)		1,306,778
Commercial mortgage-backed securities	2,109,721		395		(169,668)		1,940,448
Residential mortgage-backed securities	553,591		6		(26,804)		526,793
Asset-backed securities	1,693		—		(53)		1,640
Corporate bonds	771,761		836		(104,101)		668,496
Total fixed maturity securities	12,805,887		13,100		(962,152)		11,856,835
Short-term investments	2,663,560		5,760		(58)		2,669,262
Investments, available-for-sale	$	15,469,447	$	18,860	$	(962,210)	$	14,526,097

	December 31, 2021
(dollars in thousands)	Amortized Cost		Gross Unrealized Holding Gains		Gross Unrealized Holding Losses		Estimated Fair Value
Fixed maturity securities:
U.S. Treasury securities	$	2,489,032	$	2,633	$	(21,471)	$	2,470,194
U.S. government-sponsored enterprises	753,029		28,997		(6,439)		775,587
Obligations of states, municipalities and political subdivisions	4,007,211		266,575		(7,862)		4,265,924
Foreign governments	1,394,771		134,071		(9,488)		1,519,354
Commercial mortgage-backed securities	1,928,775		69,810		(8,152)		1,990,433
Residential mortgage-backed securities	699,136		27,084		(170)		726,050
Asset-backed securities	3,035		46		—		3,081
Corporate bonds	786,478		54,475		(4,271)		836,682
Total fixed maturity securities	12,061,467		583,691		(57,853)		12,587,305
Short-term investments	1,805,300		28		(5,340)		1,799,988
Investments, available-for-sale	$	13,866,767	$	583,719	$	(63,193)	$	14,387,293

Summary Of Gross Unrealized Investment Losses By Length Of Time That Securities Have Continuously Been In An Unrealized Loss Position

The following tables summarize gross unrealized investment losses on available-for-sale investments by the length of time that securities have continuously been in an unrealized loss position.

	December 31, 2022
	Less than 12 months				12 months or longer				Total
(dollars in thousands)	Estimated Fair Value		Gross  Unrealized Holding Losses		Estimated Fair Value		Gross  Unrealized Holding Losses		Estimated Fair Value		Gross  Unrealized Holding Losses
Fixed maturity securities:
U.S. Treasury securities	$	735,605	$	(30,583)	$	1,907,922	$	(107,910)	$	2,643,527	$	(138,493)
U.S. government-sponsored enterprises	413,495		(40,488)		331,391		(65,591)		744,886		(106,079)
Obligations of states, municipalities and political subdivisions	2,474,289		(164,537)		348,943		(82,694)		2,823,232		(247,231)
Foreign governments	900,322		(115,324)		300,423		(54,399)		1,200,745		(169,723)
Commercial mortgage-backed securities	1,611,603		(117,482)		305,217		(52,186)		1,916,820		(169,668)
Residential mortgage-backed securities	516,423		(25,232)		9,342		(1,572)		525,765		(26,804)
Asset-backed securities	1,640		(53)		—		—		1,640		(53)
Corporate bonds	496,766		(74,542)		153,035		(29,559)		649,801		(104,101)
Total fixed maturity securities	7,150,143		(568,241)		3,356,273		(393,911)		10,506,416		(962,152)
Short-term investments	774,480		(58)		—		—		774,480		(58)
Total	$	7,924,623	$	(568,299)	$	3,356,273	$	(393,911)	$	11,280,896	$	(962,210)

	December 31, 2021
	Less than 12 months				12 months or longer				Total
(dollars in thousands)	Estimated Fair Value		Gross  Unrealized Holding Losses		Estimated Fair Value		Gross  Unrealized Holding Losses		Estimated Fair Value		Gross  Unrealized Holding Losses
Fixed maturity securities:
U.S. Treasury securities	$	2,236,637	$	(18,433)	$	97,173	$	(3,038)	$	2,333,810	$	(21,471)
U.S. government-sponsored enterprises	381,495		(5,640)		14,010		(799)		395,505		(6,439)
Obligations of states, municipalities and political subdivisions	393,249		(6,941)		23,589		(921)		416,838		(7,862)
Foreign governments	322,813		(8,596)		25,564		(892)		348,377		(9,488)
Commercial mortgage-backed securities	345,616		(7,765)		9,189		(387)		354,805		(8,152)
Residential mortgage-backed securities	12,828		(159)		269		(11)		13,097		(170)
Corporate bonds	193,786		(4,271)		—		—		193,786		(4,271)
Total fixed maturity securities	3,886,424		(51,805)		169,794		(6,048)		4,056,218		(57,853)
Short-term investments	228,870		(5,340)		—		—		228,870		(5,340)
Total	$	4,115,294	$	(57,145)	$	169,794	$	(6,048)	$	4,285,088	$	(63,193)

Schedule Of Amortized Cost And Estimated Fair Value Of Fixed Maturities By Contractual Maturity

The amortized cost and estimated fair value of fixed maturity securities at December 31, 2022 are shown below by contractual maturity.

(dollars in thousands)	Amortized Cost		Estimated Fair Value
Due in one year or less	$	1,363,418	$	1,337,550
Due after one year through five years	3,926,756		3,708,752
Due after five years through ten years	3,115,913		2,787,686
Due after ten years	1,734,795		1,553,966
	10,140,882		9,387,954
Commercial mortgage-backed securities	2,109,721		1,940,448
Residential mortgage-backed securities	553,591		526,793
Asset-backed securities	1,693		1,640
Total fixed maturity securities	$	12,805,887	$	11,856,835

Components Of Net Investment Income

The following table presents the components of net investment income.

	Years Ended December 31,
(dollars in thousands)	2022		2021		2020
Interest:
Fixed maturity securities	$	294,417	$	283,366	$	288,421
Short-term investments	33,493		2,475		6,400
Cash and cash equivalents	28,890		479		7,921
Dividends on equity securities	107,213		98,099		89,303
	464,013		384,419		392,045
Investment expenses	(17,258)		(17,002)		(16,219)
Net investment income	$	446,755	$	367,417	$	375,826

Summary Of Net Realized Investment Gains (Losses) And The Change In Net Unrealized Gains On Investments

The following table presents the components of net investment gains (losses) included in net income (loss) and the change in net unrealized gains (losses) included in other comprehensive income (loss). Gross realized investment gains and losses on fixed maturity securities, short-term investments and other investments were not material to the consolidated financial statements and are presented on a net basis in the following table.

	Years Ended December 31,
(dollars in thousands)	2022		2021		2020
Fixed maturity securities, short-term investments and other investments:
Net realized investment gains (losses)	$	(40,983)	$	37,908	$	14,780
Equity securities:
Change in fair value of securities sold during the period	(14,884)		25,902		(470,008)
Change in fair value of securities held at the end of the period	(1,539,866)		1,914,724		1,073,207
Total change in fair value	(1,554,750)		1,940,626		603,199
Net investment gains (losses)	$	(1,595,733)	$	1,978,534	$	617,979
Change in net unrealized gains (losses) on available-for-sale investments included in other comprehensive income (loss):
Fixed maturity securities	$	(1,474,890)	$	(504,133)	$	507,903
Short-term investments	11,014		(8,951)		2,344
Reserve deficiency adjustment for life and annuity benefit reserves (see note 13)	56,560		62,988		(68,158)
Net increase (decrease)	$	(1,407,316)	$	(450,096)	$	442,089

Schedule of Restricted Assets

Total restricted assets are included on the Company's consolidated balance sheets as follows.

	December 31,
(dollars in thousands)	2022		2021
Investments	$	4,160,842	$	4,403,414
Restricted cash and cash equivalents	1,084,081		902,457
Total	$	5,244,923	$	5,305,871

Components Of Restricted Assets

The following table presents the components of restricted assets.

	December 31,
(dollars in thousands)	2022		2021
Assets held in trust or on deposit to support underwriting activities	$	4,807,135	$	4,895,627
Assets pledged as security for letters of credit	437,788		410,244
Total	$	5,244,923	$	5,305,871

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Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2022

Fair Value Disclosures [Abstract]

Balances Of Assets Measured At Fair Value On A Recurring Basis

The following tables present the balances of assets measured at fair value on a recurring basis by level within the fair value hierarchy.

	December 31, 2022
(dollars in thousands)	Level 1		Level 2		Level 3		Total
Assets:
Investments:
Fixed maturity securities, available-for-sale:
U.S. Treasury securities	$	—	$	2,913,959	$	—	$	2,913,959
U.S. government-sponsored enterprises	—		765,538		—		765,538
Obligations of states, municipalities and political subdivisions	—		3,733,183		—		3,733,183
Foreign governments	—		1,306,778		—		1,306,778
Commercial mortgage-backed securities	—		1,940,448		—		1,940,448
Residential mortgage-backed securities	—		526,793		—		526,793
Asset-backed securities	—		1,640		—		1,640
Corporate bonds	—		668,496		—		668,496
Total fixed maturity securities, available-for-sale	—		11,856,835		—		11,856,835
Equity securities:
Insurance, banks and other financial institutions	2,952,689		—		899		2,953,588
Industrial, consumer and all other	4,718,324		—		—		4,718,324
Total equity securities	7,671,013		—		899		7,671,912
Short-term investments, available-for-sale	2,510,164		159,098		—		2,669,262
Total investments	$	10,181,177	$	12,015,933	$	899	$	22,198,009

	December 31, 2021
(dollars in thousands)	Level 1		Level 2		Level 3		Total
Assets:
Investments:
Fixed maturity securities, available-for-sale:
U.S. Treasury securities	$	—	$	2,470,194	$	—	$	2,470,194
U.S. government-sponsored enterprises	—		775,587		—		775,587
Obligations of states, municipalities and political subdivisions	—		4,265,924		—		4,265,924
Foreign governments	—		1,519,354		—		1,519,354
Commercial mortgage-backed securities	—		1,990,433		—		1,990,433
Residential mortgage-backed securities	—		726,050		—		726,050
Asset-backed securities	—		3,081		—		3,081
Corporate bonds	—		836,682		—		836,682
Total fixed maturity securities, available-for-sale	—		12,587,305		—		12,587,305
Equity securities:
Insurance, banks and other financial institutions	3,307,755		—		56,472		3,364,227
Industrial, consumer and all other	5,659,700		—		—		5,659,700
Total equity securities	8,967,455		—		56,472		9,023,927
Short-term investments, available-for-sale	1,619,496		180,492		—		1,799,988
Total investments	$	10,586,951	$	12,767,797	$	56,472	$	23,411,220

Summary Of Changes In Level 3 Investments Measured At Fair Value On A Recurring Basis

The following table summarizes changes in Level 3 investments measured at fair value on a recurring basis.

(dollars in thousands)	2022		2021
Equity securities, beginning of period	$	56,472	$	58,493
Purchases	—		18,900
Sales	(56,335)		(15,015)
Net investment gains (losses)	762		(5,906)
Equity securities, end of period	$	899	$	56,472

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Receivables, Loans, Notes Receivable, and Others (Tables)

12 Months Ended

Dec. 31, 2022

Receivables [Abstract]

Components Of Receivables

The following table presents the components of receivables.

	December 31,
(dollars in thousands)	2022		2021
Insurance
Amounts receivable from agents, brokers and insureds	$	2,176,295	$	1,740,864
Other insurance	83,728		133,350
Markel Ventures	645,189		510,382
Other	77,961		50,379
	2,983,173		2,434,975
Allowance for credit losses	(22,117)		(21,037)
Receivables	$	2,961,056	$	2,413,938

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Goodwill And Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2022

Goodwill and Intangible Assets Disclosure [Abstract]

Components Of Goodwill

The following table presents a rollforward of the components of goodwill by reportable segment.

(dollars in thousands)	Insurance		Reinsurance		Markel Ventures		Other(1)		Total
January 1, 2021	$	772,700	$	122,745	$	901,045	$	808,134	$	2,604,624
Acquisitions	—		—		293,838		—		293,838
Foreign currency movements and other adjustments	2,012		—		1,707		(3,041)		678
December 31, 2021 (2)	$	774,712	$	122,745	$	1,196,590	$	805,093	$	2,899,140
Acquisitions	—		—		41,905		—		41,905
Dispositions	—		—		—		(132,455)		(132,455)
Impairment of goodwill	—		—		—		(80,000)		(80,000)
Adjustments to preliminary purchase price allocation	—		—		(83,358)		—		(83,358)
Foreign currency movements and other adjustments	(3,084)		—		(1,228)		(2,082)		(6,394)
December 31, 2022 (2)	$	771,628	$	122,745	$	1,153,909	$	590,556	$	2,638,838

(1)    Amounts included in Other reflect the Company's operations that are not included in a reportable segment and are primarily related to the Company's program services and insurance-linked securities operations.

(2)    As of December 31, 2022, goodwill was net of accumulated impairment losses of $190.6 million, of which $171.9 million was in Other and $18.7 million was in Markel Ventures. As of December 31, 2021, goodwill was net of accumulated impairment losses of $110.6 million, of which $91.9 million was in Other and $18.7 million was in Markel Ventures.

Components of Net Intangible Assets

The following table presents a rollforward of net intangible assets by reportable segment.

(dollars in thousands)	Underwriting(1)		Markel Ventures		Other(2)		Total
January 1, 2021	$	442,639	$	623,120	$	716,959	$	1,782,718
Acquisitions	—		203,879		—		203,879
Amortization of intangible assets	(41,182)		(57,568)		(61,789)		(160,539)
Foreign currency movements and other adjustments	(202)		(3,252)		(118)		(3,572)
December 31, 2021	$	401,255	$	766,179	$	655,052	$	1,822,486
Acquisitions	—		21,614		—		21,614
Dispositions	—		—		(2,716)		(2,716)
Amortization of intangible assets	(38,533)		(79,043)		(61,202)		(178,778)
Adjustments to preliminary purchase price allocation	—		86,773		—		86,773
Foreign currency movements and other adjustments	(400)		774		(2,289)		(1,915)
December 31, 2022	$	362,322	$	796,297	$	588,845	$	1,747,464

(1)    Amounts included in Underwriting reflect the intangible assets associated with the Company's underwriting segments, which are not allocated between the Insurance and Reinsurance segments.

(2)    Amounts included in Other reflect the Company's operations that are not included in a reportable segment and are primarily related to the Company's program services and insurance-linked securities operations.

Components Of Intangible Assets

The following table presents the components of intangible assets.

	December 31,
	2022				2021
(dollars in thousands)	Gross Carrying Amount		Accumulated Amortization		Gross Carrying Amount		Accumulated Amortization
Customer relationships	$	1,425,330	$	(498,987)	$	1,379,739	$	(405,057)
Investment management agreements	464,000		(120,394)		468,000		(92,478)
Broker relationships	204,972		(117,386)		206,855		(109,210)
Trade names	293,194		(118,976)		238,331		(100,023)
Technology	113,170		(92,646)		113,200		(82,845)
Agent relationships	92,000		(34,756)		92,000		(28,622)
Insurance licenses	74,333		—		74,333		—
Renewal rights	21,449		(21,449)		21,449		(21,449)
Other	148,326		(84,716)		145,695		(77,432)
Total	$	2,836,774	$	(1,089,310)	$	2,739,602	$	(917,116)

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Leases (Tables)

12 Months Ended

Dec. 31, 2022

Leases [Abstract]

Schedule Of Supplemental Balance Sheet Information Related to Leases

The following table summarizes details for the Company's operating leases recorded on the consolidated balance sheets.

	December 31,
(dollars in thousands)	2022			2021
Right-of-use lease assets	$	526,704		$	533,702
Lease liabilities	$	554,394		$	571,337
Weighted average remaining lease term	11.7 years			10.8 years
Weighted average discount rate	3.1		%	3.0		%

Maturities of Operating Lease Liabilities

The following table summarizes maturities of the Company's operating lease liabilities as of December 31, 2022, which reconciles to total operating lease liabilities included in other liabilities on the Company's consolidated balance sheet.

Years Ending December 31,	(dollars in thousands)
2023	$	100,887
2024	85,030
2025	71,474
2026	60,729
2027	51,702
2028 and thereafter	291,290
Total lease payments	661,112
Less imputed interest	(106,718)
Total operating lease liabilities	$	554,394

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Products, Services and Other Revenues (Tables)

12 Months Ended

Dec. 31, 2022

Revenue from Contract with Customer [Abstract]

Schedule Of Revenues From Contracts With Customers By Type

The following table presents revenues from contracts with customers by segment and type, all of which are included in products revenues and services and other revenues in the consolidated statements of income (loss) and comprehensive income (loss), along with a reconciliation to total products revenues and services and other revenues.

	Years Ended December 31,
	2022						2021						2020
(dollars in thousands)	Markel Ventures		Other		Total		Markel Ventures		Other		Total		Markel Ventures		Other		Total
Products	$	2,379,399	$	—	$	2,379,399	$	1,668,448	$	—	$	1,668,448	$	1,396,706	$	—	$	1,396,706
Services	2,265,413		43,875		2,309,288		1,863,706		134,850		1,998,556		1,295,734		116,476		1,412,210
Investment management	—		79,209		79,209		—		86,257		86,257		—		117,193		117,193
Total revenues from contracts with customers	4,644,812		123,084		4,767,896		3,532,154		221,107		3,753,261		2,692,440		233,669		2,926,109
Program services and other fronting	—		147,612		147,612		—		123,823		123,823		—		102,989		102,989
Disposition gains	—		225,828		225,828		—		—		—		—		—		—
Other	111,806		(16,621)		95,185		111,662		8,699		120,361		102,274		(2,316)		99,958
Total	$	4,756,618	$	479,903	$	5,236,521	$	3,643,816	$	353,629	$	3,997,445	$	2,794,714	$	334,342	$	3,129,056

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Unpaid Losses And Loss Adjustment Expenses (Tables)

12 Months Ended

Dec. 31, 2022

Liability for Unpaid Claims and Claims Adjustment Expense, Incurred Claims [Abstract]

Reconciliation Of Consolidated Reserves For Losses And Loss Adjustment Expenses

The following table presents a reconciliation of consolidated beginning and ending reserves for losses and loss adjustment expenses.

	Years Ended December 31,
(dollars in thousands)	2022		2021		2020
Gross reserves for losses and loss adjustment expenses, beginning of year	$	18,178,894	$	16,222,376	$	14,728,676
Reinsurance recoverables on unpaid losses, beginning of year	6,876,317		5,736,659		5,253,415
Net reserves for losses and loss adjustment expenses, beginning of year	11,302,577		10,485,717		9,475,261
Effect of foreign currency rate changes on beginning of year balance	(160,622)		(54,736)		68,368
Effect of adoption of ASC 326, Financial Instruments—Credit Losses	—		—		3,849
Adjusted net reserves for losses and loss adjustment expenses, beginning of year	11,141,955		10,430,981		9,547,478
Incurred losses and loss adjustment expenses:
Current accident year	4,613,035		4,061,000		4,073,325
Prior accident years	(167,446)		(478,930)		(606,414)
Total incurred losses and loss adjustment expenses	4,445,589		3,582,070		3,466,911
Payments:
Current accident year	580,537		637,169		749,887
Prior accident years	2,396,446		2,066,290		1,779,980
Total payments	2,976,983		2,703,459		2,529,867
Effect of foreign currency rate changes on current year activity	(5,468)		(4,253)		1,195
Net reserves for losses and loss adjustment expenses of Markel CATCo Re (see note 17)	347,921		—		—
Net reserves for losses and loss adjustment expenses of insurance companies sold	—		(2,762)		—
Net reserves for losses and loss adjustment expenses, end of year	12,953,014		11,302,577		10,485,717
Reinsurance recoverables on unpaid losses, end of year	7,994,884		6,876,317		5,736,659
Gross reserves for losses and loss adjustment expenses, end of year	$	20,947,898	$	18,178,894	$	16,222,376

Prior Year Losses and Loss Adjustment Expenses Development by Segment and by Product Line

The following tables summarize, by segment, the product lines with the most significant changes in prior accident years loss reserves for the years ended December 31, 2022, 2021 and 2020, along with the corresponding accident years and the trends and factors that impacted management's best estimate of ultimate losses and loss adjustment expenses on underlying products in each of these product lines. The Company does not estimate losses at this level of aggregation as it offers a diverse portfolio of products and manages these products in logical groupings within each underwriting segment. As a result of the trends and factors described in the following tables, the Company's actuaries adjusted their estimates of the ultimate liability for unpaid losses and loss adjustment expenses. Additionally, for those product lines with favorable development on prior accident years loss reserves, management has now given more credibility to the favorable trends observed by the Company's actuaries and after also incorporating these favorable trends into its best estimate, reduced prior years loss reserves accordingly. The unfavorable claims and loss trends experienced on certain accident years within the Company's professional liability and general liability product lines in 2022 reflected broader market conditions, including the effects of economic and social inflation, as well as delays in court proceedings that began in 2020 and disrupted the development of the claims trend. These trends were most impactful on the 2018 and 2019 accident years for the professional liability product lines and the 2016 to 2019 accident years for the general liability product lines. Consistent with the Company's reserving philosophy, management is responding quickly to increase loss reserves following any indication of increased claims frequency or severity in excess of previous expectations.

	Year Ended December 31, 2022
(dollars in millions)	Loss Development		Accident Years with Most Significant Development	Trends and Factors Impacting Loss Estimates
Insurance segment:
Professional liability
2018 and 2019 accident years	$	121.0	2018 and 2019	Unfavorable claims settlements and increased claim frequency and severity, primarily on directors and officers, errors and omissions and employment practices liability lines
All other accident years	(91.1)		Several	More favorable loss experience and lower loss severity than previously anticipated
General liability
2016 to 2019 accident years	61.6		2016 to 2019	Unfavorable claims settlements and increased claim frequency and severity, primarily on contractors and excess and umbrella lines
All other accident years	(20.5)		Several	Lower loss frequency and severity than previously anticipated
Workers' compensation	(62.1)		2016 to 2021	Lower loss severity than previously anticipated
Programs	(48.3)		2020 and 2021	Lower than expected frequency of claims
Property	(48.1)		2020 and 2021	Lower loss severity than originally anticipated as well as favorable development on COVID-19
Credit and surety	(31.7)		2019 to 2021	Lower than expected frequency of claims
Other products	(23.7)
Total Insurance	(142.9)
Reinsurance segment:
Property	(29.2)		2017 to 2019	Favorable development on catastrophe events
Credit and surety	(22.9)		Several	Favorable commutations on mortgage insurance contracts
Premium adjustments	53.1		2020 and 2021	Recognition of additional exposures on prior accident years related to net favorable premium adjustments primarily on general liability, credit and surety and professional liability
Other products	(27.1)
Total Reinsurance	(26.1)
Other underwriting	1.6
Total decrease	$	(167.4)

	Year Ended December 31, 2021
(dollars in millions)	Loss Development		Accident Years with Most Significant Development	Trends and Factors Impacting Loss Estimates
Insurance segment:
General liability	$	(139.7)	Several	Lower than expected frequency of claims and more favorable experience than originally anticipated across several sub-product lines
Property	(96.5)		2018 to 2020	Lower than expected frequency of large claims as well as favorable development on COVID-19 and catastrophe events
Workers' compensation	(79.0)		Several	Lower loss severity than originally anticipated
Marine and energy	(60.0)		2018 to 2020	Lower loss frequency and severity than originally anticipated
Professional liability	(54.7)		Several	Lower loss frequency and severity than originally anticipated
Other products	(76.4)
Total Insurance	(506.3)
Reinsurance segment:
Property	35.0		2020	Adverse development on COVID-19 and catastrophe events
Professional liability	29.2		Several	Recognition of additional exposures on prior accident years related to net favorable premium adjustments
General liability	(19.2)		2011, 2012, 2017 and 2020	Favorable development on COVID-19 and catastrophe events as well as lower than expected paid losses on reported claims
Credit and surety	(16.6)		2020	Favorable commutations on mortgage insurance contracts
Other products	(8.5)
Total Reinsurance	19.9
Other underwriting	6.6
Total decrease	$	(479.8)

	Year Ended December 31, 2020
(dollars in millions)	Loss Development		Accident Years with Most Significant Development	Trends and Factors Impacting Loss Estimates
Insurance segment:
General liability	$	(131.8)	Several	More favorable claims experience than originally anticipated across several sub-product lines
Professional liability	(128.9)		Several	More favorable claims experience than originally anticipated across several sub-product lines
Workers' compensation	(92.3)		2017 to 2019	Lower loss severity than originally anticipated
Marine and energy	(46.0)		2016 to 2019	Lower than expected frequency of claims
Other products	(155.6)
Total Insurance	(554.6)
Reinsurance segment:
Property	(68.4)		2017 to 2019	Lower than expected severity of claims
Public entity	34.4		2016 to 2019	Higher than expected frequency and severity of claims
Professional liability	21.0		2016 to 2019	Recognition of additional exposures on prior accident years related to net favorable premium adjustments and higher than expected loss severity and claims frequency
Other products	(38.8)
Total Reinsurance	(51.8)
Total decrease	$	(606.4)

Ultimate Incurred Losses And Cumulative Paid Losses And Allocated Loss Adjustment Expenses, Net Of Reinsurance

The Insurance segment table that follows also includes claim frequency information, by accident year. The Company defines a claim as a single claim incident, per policy, which may include multiple claimants and multiple coverages on a single policy. Claim counts include claims closed without a payment as well as claims where the Company is monitoring to determine if an exposure exists, even if a reserve has not been established.

All of the business contained within the Company's Reinsurance segment represents treaty business that is assumed from other insurance or reinsurance companies, for which the Company does not have access to the underlying claim counts. Further, this business includes both quota share and excess of loss treaty reinsurance, through which only a portion of each reported claim results in losses to the Company. As such, the Company has excluded claim count information from the Reinsurance segment disclosures.

Insurance Segment

(dollars in millions)	Ultimate Incurred Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance																				Total of Incurred-but-Not-Reported Liabilities, Net of Reinsurance		Cumulative Number of Reported Claims
	Unaudited																		As of December 31,
	As of December 31,
Accident Year	2013		2014		2015		2016		2017		2018		2019		2020		2021		2022		December 31, 2022
2013	$	1,724.9	$	1,683.4	$	1,514.7	$	1,452.6	$	1,406.2	$	1,360.8	$	1,315.6	$	1,296.6	$	1,292.8	$	1,283.7	$	43.3	91,000
2014			1,850.8		1,680.7		1,613.0		1,556.8		1,508.6		1,487.4		1,455.2		1,457.7		1,438.2		52.8		86,000
2015					1,769.1		1,695.0		1,571.9		1,517.8		1,487.2		1,455.2		1,451.2		1,442.2		65.9		89,000
2016							1,858.0		1,854.2		1,756.3		1,703.9		1,677.1		1,669.8		1,682.3		86.9		101,000
2017									2,312.1		2,179.6		2,061.0		2,018.2		2,004.7		2,023.7		103.5		139,000
2018											2,432.4		2,325.5		2,099.9		2,061.6		2,153.7		194.9		193,000
2019													2,556.6		2,299.1		2,244.4		2,295.5		335.6		228,000
2020															3,083.4		2,974.7		2,914.7		1,042.6		179,000
2021																	3,085.7		2,909.0		1,483.0		137,000
2022																			4,097.4		2,791.3		121,000
Total																			$	22,240.4
	Cumulative Paid Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance
	Unaudited																		As of December 31,
	As of December 31,
Accident Year	2013		2014		2015		2016		2017		2018		2019		2020		2021		2022
2013	$	270.2	$	568.9	$	774.9	$	943.8	$	1,031.6	$	1,092.9	$	1,116.4	$	1,150.2	$	1,163.9	$	1,178.2
2014			329.6		652.6		886.6		1,052.9		1,157.3		1,240.4		1,288.8		1,308.8		1,339.9
2015					321.0		660.7		870.9		1,034.0		1,142.1		1,230.9		1,260.6		1,293.0
2016							370.3		747.4		975.4		1,160.0		1,288.3		1,351.9		1,427.5
2017									436.0		983.9		1,275.6		1,511.1		1,620.1		1,741.0
2018											492.2		1,019.3		1,346.9		1,498.3		1,674.8
2019													523.9		1,082.4		1,261.4		1,574.1
2020															807.8		1,150.9		1,518.1
2021																	474.3		988.5
2022																			834.4
Total																			$	13,569.5
All outstanding liabilities for unpaid losses and loss adjustment expenses before 2013, net of reinsurance																			237.4
Total liabilities for unpaid losses and loss adjustment expenses, net of reinsurance																			$	8,908.3

Reinsurance Segment

	Ultimate Incurred Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance																				Total of Incurred-but-Not-Reported Liabilities, Net of Reinsurance
	Unaudited																		As of December 31,
(dollars in millions)	As of December 31,
Accident Year	2013		2014		2015		2016		2017		2018		2019		2020		2021		2022		December 31, 2022
2013	$	579.4	$	571.8	$	538.3	$	525.4	$	533.2	$	496.1	$	478.2	$	480.0	$	475.3	$	476.9	$	32.7
2014			569.2		552.1		524.4		563.1		542.2		519.3		503.8		505.3		501.2		60.3
2015					523.1		508.8		523.7		515.0		503.9		498.6		486.3		486.6		84.4
2016							509.1		518.5		519.0		516.9		526.8		550.9		554.3		69.8
2017									895.7		928.7		934.7		936.0		908.2		920.4		105.6
2018											749.5		775.3		767.9		772.1		767.8		150.7
2019													662.0		675.6		689.2		702.7		223.4
2020															680.2		732.7		742.4		344.0
2021																	735.5		736.7		446.9
2022																			662.6		614.1
Total																			$	6,551.6
	Cumulative Paid Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance
	Unaudited																		As of December 31,
	As of December 31,
Accident Year	2013		2014		2015		2016		2017		2018		2019		2020		2021		2022
2013	$	70.6	$	153.4	$	205.5	$	263.2	$	295.6	$	324.9	$	343.3	$	358.1	$	369.5	$	383.4
2014			97.4		155.6		220.5		267.0		302.9		335.7		352.9		369.3		379.4
2015					63.6		131.2		202.0		252.7		299.6		324.1		343.7		360.3
2016							79.0		167.9		237.9		294.3		346.0		379.4		419.5
2017									157.4		358.1		479.2		560.9		624.5		693.5
2018											87.0		243.7		344.7		414.4		484.5
2019													53.5		173.6		268.4		359.6
2020															93.5		203.7		309.8
2021																	79.5		187.8
2022																			24.2
Total																			$	3,602.0
All outstanding liabilities for unpaid losses and loss adjustment expenses before 2013, net of reinsurance																			388.0
Total liabilities for unpaid losses and loss adjustment expenses, net of reinsurance																			$	3,337.6

Average Annual Percentage Payout Of Incurred Losses By Age (in Years), Net Of Reinsurance

The following table presents supplementary information about average historical claims duration as of December 31, 2022 based on the cumulative incurred and paid losses and allocated loss adjustment expenses presented above.

	Average Annual Percentage Payout of Incurred Losses by Age (in Years), Net of Reinsurance
Unaudited	1		2		3		4		5		6		7		8		9		10
Insurance	22.0	%	21.9	%	13.8	%	11.3	%	7.1	%	5.3	%	2.9	%	2.1	%	1.6	%	1.1	%
Reinsurance	12.5	%	16.4	%	13.1	%	10.4	%	8.2	%	6.3	%	4.6	%	3.3	%	2.2	%	2.9	%

Reconciliation Of Net Incurred And Paid Loss Development Tables, By Segment, To The Liability For Losses And Loss Adjustment Expenses In The Consolidated Balance Sheet

The following table reconciles the net incurred and paid loss development tables to the liability for losses and loss adjustment expenses on the consolidated balance sheet.

(dollars in thousands)	December 31, 2022
Net outstanding liabilities
Insurance segment	$	8,908,308
Reinsurance segment	3,337,587
Other underwriting	89,563
Program services and other fronting	9,982
Markel CATCo Re (see note 17)	347,921
Liabilities for unpaid losses and loss adjustment expenses, net of reinsurance	12,693,361
Reinsurance recoverable on unpaid losses
Insurance segment	2,425,560
Reinsurance segment	277,854
Other underwriting	56,968
Program services and other fronting	5,234,502
Total reinsurance recoverable on unpaid losses	7,994,884
Unallocated loss adjustment expenses	326,275
Unamortized discount, net of acquisition fair value adjustments, included in unpaid losses and loss adjustment expenses	(66,622)
	259,653
Total gross liability for unpaid losses and loss adjustment expenses	$	20,947,898

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Reinsurance (Tables)

12 Months Ended

Dec. 31, 2022

Reinsurance Disclosures [Abstract]

Effect Of Reinsurance And Retrocessional Reinsurance On Consolidated Premiums Written And Earned

The following tables summarize the effect of reinsurance and retrocessional reinsurance on premiums written and earned.

	Year Ended December 31, 2022
(dollars in thousands)	Direct		Assumed		Ceded		Net Premiums
Underwriting:
Written	$	8,085,812	$	1,761,726	$	(1,640,165)	$	8,207,373
Earned	$	7,379,766	$	1,589,920	$	(1,378,191)	$	7,591,495
Program services and other fronting:
Written	2,644,138		710,006		(3,358,127)		(3,983)
Earned	2,688,804		656,885		(3,349,392)		(3,703)
Consolidated:
Written	$	10,729,950	$	2,471,732	$	(4,998,292)	$	8,203,390
Earned	$	10,068,570	$	2,246,805	$	(4,727,583)	$	7,587,792

	Year Ended December 31, 2021
(dollars in thousands)	Direct		Assumed		Ceded		Net Premiums
Underwriting:
Written	$	6,863,229	$	1,622,700	$	(1,360,763)	$	7,125,166
Earned	$	6,275,078	$	1,482,755	$	(1,250,392)	$	6,507,441
Program services and other fronting:
Written	2,644,955		307,798		(2,958,188)		(5,435)
Earned	2,453,990		261,591		(2,719,993)		(4,412)
Consolidated:
Written	$	9,508,184	$	1,930,498	$	(4,318,951)	$	7,119,731
Earned	$	8,729,068	$	1,744,346	$	(3,970,385)	$	6,503,029

	Year Ended December 31, 2020
(dollars in thousands)	Direct		Assumed		Ceded		Net Premiums
Underwriting:
Written	$	5,715,038	$	1,444,967	$	(1,222,390)	$	5,937,615
Earned	$	5,357,888	$	1,394,239	$	(1,134,501)	$	5,617,626
Program services and other fronting:
Written	2,038,743		67,917		(2,112,037)		(5,377)
Earned	2,084,888		74,847		(2,165,156)		(5,421)
Consolidated:
Written	$	7,753,781	$	1,512,884	$	(3,334,427)	$	5,932,238
Earned	$	7,442,776	$	1,469,086	$	(3,299,657)	$	5,612,205

Effect of Reinsurance And Retrocessional Reinsurance on Incurred Losses and Loss Adjustment Expenses

The following table summarizes the effect of reinsurance and retrocessional reinsurance on losses and loss adjustment expenses in the Company's underwriting operations.

	Years ended December 31,
(dollars in thousands)	2022		2021		2020
Gross losses and loss adjustment expenses	$	5,281,424	$	4,477,752	$	4,189,948
Ceded losses and loss adjustment expenses	(834,648)		(893,230)		(722,619)
Net losses and loss adjustment expenses	$	4,446,776	$	3,584,522	$	3,467,329

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Life And Annuity Benefits (Tables)

12 Months Ended

Dec. 31, 2022

Liability for Future Policy Benefit, before Reinsurance [Abstract]

Schedule Of Life And Annuity Benefits

The following table presents reserves for life and annuity benefits.

	December 31,
(dollars in thousands)	2022		2021
Life	$	102,321	$	113,797
Annuities	628,441		753,971
Accident and health	28,263		35,212
Total	$	759,025	$	902,980

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Senior Long-Term Debt And Other Debt (Tables)

12 Months Ended

Dec. 31, 2022

Debt Disclosure [Abstract]

Summary Of Senior Long-Term Debt And Other Debt

The following table summarizes the Company's senior long-term debt and other debt.

	December 31,
(dollars in thousands)	2022		2021
4.90% unsecured senior notes, due July 1, 2022, interest payable semi-annually, net of unamortized discount of $159 in 2021	$	—	$	349,815
3.625% unsecured senior notes, due March 30, 2023, interest payable semi-annually, net of unamortized discount of $50 in 2022 and $251 in 2021	249,940		249,702
3.50% unsecured senior notes, due November 1, 2027, interest payable semi-annually, net of unamortized discount of $1,161 in 2022 and $1,445 in 2021	298,502		298,136
3.35% unsecured senior notes, due September 17, 2029, interest payable semi-annually, net of unamortized discount of $1,668 in 2022 and $1,916 in 2021	297,997		297,700
7.35% unsecured senior notes, due August 15, 2034, interest payable semi-annually, net of unamortized discount of $800 in 2022 and $868 in 2021	129,004		128,932
5.0% unsecured senior notes, due March 30, 2043, interest payable semi-annually, net of unamortized discount of $4,535 in 2022 and $4,759 in 2021	245,214		244,978
5.0% unsecured senior notes, due April 5, 2046, interest payable semi-annually, net of unamortized discount of $5,689 in 2022 and $5,933 in 2021	493,585		493,310
4.30% unsecured senior notes, due November 1, 2047, interest payable semi-annually, net of unamortized discount of $3,669 in 2022 and $3,821 in 2021	295,691		295,512
5.0% unsecured senior notes, due May 20, 2049, interest payable semi-annually, net of unamortized discount of $6,900 in 2022 and $7,161 in 2021	591,927		591,621
4.15% unsecured senior notes, due September 17, 2050, interest payable semi-annually, net of unamortized discount of $4,917 in 2022 and $5,095 in 2021	494,342		494,138
3.45% unsecured senior notes, due May 7, 2052, interest payable semi-annually, net of unamortized discount of $8,182 in 2022 and $8,461 in 2021	590,689		590,378
Other debt, at various interest rates ranging from 2.1% to 9.9%	416,738		327,044
Senior long-term debt and other debt	$	4,103,629	$	4,361,266

Summary Of Future Principal Payments Due At Maturity On Senior Long-Term Debt And Other Debt

The following table summarizes the future principal payments due at maturity on senior long-term debt and other debt as of December 31, 2022.

Years Ending December 31,	(dollars in thousands)
2023	$	399,604
2024	27,180
2025	24,934
2026	25,637
2027	444,335
2028 and thereafter	3,226,317
Total principal payments	$	4,148,007
Net unamortized discount	(37,572)
Net unamortized debt issuance costs	(6,806)
Senior long-term debt and other debt	$	4,103,629

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Income Taxes (Tables)

12 Months Ended

Dec. 31, 2022

Income Tax Disclosure [Abstract]

Components Of Income Before Income Taxes

Income (loss) before income taxes includes the following components, based on country of domicile.

	Years Ended December 31,
(dollars in thousands)	2022		2021		2020
U.S. operations	$	(109,311)	$	2,263,748	$	1,003,714
Foreign operations	(39,528)		868,445		(3,265)
Income (loss) before income taxes	$	(148,839)	$	3,132,193	$	1,000,449

Components Of Income Tax Expense (Benefit)

Income tax expense (benefit) includes the following components, based on the taxing authority to which taxes are paid. The Company's most significant U.K. and Bermuda subsidiaries have elected to be taxed as domestic corporations for U.S. tax purposes. U.S. income tax also includes state income tax expense, which is not material to the consolidated financial statements.

	Years Ended December 31,
(dollars in thousands)	2022		2021		2020
Current:
U.S. income tax	$	222,074	$	200,742	$	182,046
Foreign income tax	12,042		29,811		(10,631)
Total current tax expense	234,116		230,553		171,415
Deferred:
U.S. income tax	(300,850)		438,240		(557)
Foreign income tax	19,098		15,665		(2,176)
Total deferred tax expense (benefit)	(281,752)		453,905		(2,733)
Income tax expense (benefit)	$	(47,636)	$	684,458	$	168,682

Reconciliations Of United States Corporate Income Tax Rate To Effective Tax Rate On Income Before Income Taxes

The following table presents a reconciliation of the Company's income taxes using the U.S. corporate income tax rate to the Company's income tax expense (benefit).

	Years Ended December 31,
(dollars in thousands)	2022				2021				2020
U.S. corporate tax rate	$	(31,256)	21.0	%	$	657,760	21.0	%	$	210,093	21.0	%
Increase (decrease) resulting from:
Tax-exempt investment income	(16,063)		10.8		(16,109)		(0.5)		(16,415)		(1.6)
Foreign operations	5,335		(3.6)		14,443		0.5		6,500		0.6
Impairment of goodwill	16,800		(11.3)		—		0.0		—		0.0
Markel CATCo Re income not subject to tax	(18,871)		12.7		—		0.0		—		0.0
Nondeductible (deductible) losses on certain foreign investments	(160)		0.1		1,240		0.0		(38,666)		(3.9)
Other	(3,421)		2.3		27,124		0.9		7,170		0.7
Income tax expense (benefit)	$	(47,636)	32.0	%	$	684,458	21.9	%	$	168,682	16.8	%

Components Of Domestic And Foreign Deferred Tax Assets And Liabilities

The following table presents the components of domestic and foreign deferred tax assets and liabilities.

	December 31,
(dollars in thousands)	2022		2021
Assets:
Unpaid losses and loss adjustment expenses	$	170,518	$	186,759
Unearned premiums	161,243		139,350
Lease liabilities	132,735		135,795
Life and annuity benefits	54,893		78,777
Accrued incentive compensation	39,469		50,806
Net operating loss carryforwards	25,305		47,510
Tax credit carryforwards	18,264		21,734
Other differences between financial reporting and tax bases	65,250		66,951
Total gross deferred tax assets	667,677		727,682
Less valuation allowance	(16,943)		(23,352)
Total gross deferred tax assets, net of allowance	650,734		704,330
Liabilities:
Investments	761,421		1,401,871
Goodwill and other intangible assets	180,186		185,195
Deferred policy acquisition costs	161,220		146,601
Property, plant and equipment	144,259		126,846
Right-of-use lease assets	127,398		127,313
Other differences between financial reporting and tax bases	113,065		129,866
Total gross deferred tax liabilities	1,487,549		2,117,692
Net deferred tax liability	$	836,815	$	1,413,362

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Variable Interest Entities (Tables)

12 Months Ended

Dec. 31, 2022

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Amounts attributable to Markel CATCo Re in Markel's consolidated balance sheet

The Company's consolidated balance sheet includes the following amounts attributable to Markel CATCo Re.

(dollars in thousands)	December 31, 2022
Assets
Cash and cash equivalents	$	104,443
Restricted cash and cash equivalents	317,577
Other assets and receivables due from cedents	41,357
Total Assets	$	463,377
Liabilities and Equity
Unpaid losses and loss adjustment expenses	$	347,921
Other liabilities	26,717
Total Liabilities	374,638
Shareholders' equity	21,139
Noncontrolling interests	67,600
Total Equity	88,739
Total Liabilities and Equity	$	463,377

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Shareholders' Equity (Tables)

12 Months Ended

Dec. 31, 2022

Stockholders' Equity Note [Abstract]

Schedule of Common Stock Outstanding Roll Forward

The Company has 50,000,000 shares of no par value common stock authorized. The following table presents a rollforward of changes in common shares issued and outstanding.

	Years Ended December 31,
(in thousands)	2022	2021
Issued and outstanding common shares, beginning of year	13,632	13,783
Issuance of common shares	24	18
Repurchase of common shares	(233)	(169)
Issued and outstanding common shares, end of year	13,423	13,632

Schedule Of Net Income Per Common Share

The following table presents net income (loss) per common share and diluted net income (loss) per common share.

	Years Ended December 31,
(in thousands, except per share amounts)	2022		2021		2020
Net income (loss) to common shareholders	$	(250,123)	$	2,389,003	$	797,630
Adjustment of redeemable noncontrolling interests	(69,896)		46,874		(28,705)
Adjusted net income (loss) to common shareholders	$	(320,019)	$	2,435,877	$	768,925
Basic common shares outstanding	13,580		13,768		13,811
Dilutive potential common shares from restricted stock units and restricted stock (1) (2)	—		32		12
Diluted common shares outstanding	13,580		13,800		13,823
Basic net income (loss) per common share	$	(23.57)	$	176.92	$	55.67
Diluted net income (loss) per common share (1) (2)	$	(23.57)	$	176.51	$	55.63

(1)    The Company has issued grants and awards of restricted stock units to employees as performance, retention or hiring incentives, as well as awards of restricted stock to non-employee directors, under its equity incentive compensation plan. At December 31, 2022, there were 116,431 shares available for future awards under the Company's equity incentive compensation plan.

(2)    The impact of 33 thousand shares from restricted stock units and restricted stock was excluded from the computation of diluted net loss per common share for the year ended December 31, 2022 because the effect would have been anti-dilutive.

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Other Comprehensive Income (Loss) (Tables)

12 Months Ended

Dec. 31, 2022

Other Comprehensive Income (Loss), Tax [Abstract]

Change In Accumulated Other Comprehensive Income By Component, Net Of Noncontrolling Interests

The following table presents the change in accumulated other comprehensive income (loss) by component, net of noncontrolling interests.

(dollars in thousands)	Unrealized Gains (Losses) on Available-for-Sale Investments		Foreign Currency		Net Actuarial Pension Loss		Accumulated other comprehensive income (loss)
December 31, 2019	$	346,037	$	(86,249)	$	(51,016)	$	208,772
Total other comprehensive income (loss) before income taxes	442,089		29,829		(8,849)		463,069
Income tax (expense) benefit	(89,316)		—		1,851		(87,465)
Total other comprehensive income (loss)	352,773		29,829		(6,998)		375,604
December 31, 2020	$	698,810	$	(56,420)	$	(58,014)	$	584,376
Total other comprehensive income (loss) before income taxes	(450,096)		(2,091)		10,663		(441,524)
Income tax (expense) benefit	95,158		1,880		(2,273)		94,765
Total other comprehensive income (loss)	(354,938)		(211)		8,390		(346,759)
December 31, 2021	$	343,872	$	(56,631)	$	(49,624)	$	237,617
Total other comprehensive income (loss) before income taxes	(1,407,316)		(9,677)		31,222		(1,385,771)
Income tax (expense) benefit	297,168		401		(6,492)		291,077
Total other comprehensive income (loss)	(1,110,148)		(9,276)		24,730		(1,094,694)
December 31, 2022	$	(766,276)	$	(65,907)	$	(24,894)	$	(857,077)

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Statutory Financial Information (Tables)

12 Months Ended

Dec. 31, 2022

Statutory Financial Information [Abstract]

Statutory Capital And Surplus

The following table summarizes statutory capital and surplus for the Company's insurance subsidiaries.

	December 31,
(dollars in thousands)	2022		2021
United States	$	5,236,793	$	4,493,310
United Kingdom	$	749,495	$	736,575
Bermuda	$	1,895,132	$	2,106,606
Germany	$	125,194	$	95,693

Statutory Net Income (Loss)

The following table summarizes statutory net income (loss) for the Company's insurance subsidiaries.

	Years Ended December 31,
(dollars in thousands)	2022		2021		2020
United States	$	689,341	$	705,908	$	616,135
United Kingdom	$	35,719	$	56,546	$	(25,776)
Bermuda	$	(144,239)	$	556,275	$	228,740
Germany	$	(2,471)	$	1,780	$	(4,628)

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Markel Corporation (Parent Company Only) Financial Information (Tables)

12 Months Ended

Dec. 31, 2022

Condensed Financial Information Disclosure [Abstract]

Schedule Of Condensed Balance Sheets

CONDENSED BALANCE SHEETS

	December 31,
	2022		2021
	(dollars in thousands)
ASSETS
Investments, at estimated fair value:
Fixed maturity securities, available-for-sale (amortized cost of $164,100 in 2022 and $210,111 in 2021)	$	154,039	$	228,705
Equity securities (cost of $1,107,796 in 2022 and $1,771,597 in 2021)	1,473,116		2,784,189
Short-term investments, available-for-sale (estimated fair value approximates cost)	1,436,387		1,474,997
Total Investments	3,063,542		4,487,891
Cash and cash equivalents	594,101		763,985
Restricted cash and cash equivalents	21,146		15,485
Receivables	13,070		18,770
Investments in consolidated subsidiaries	12,905,353		13,298,971
Notes receivable from subsidiaries	60,111		135,756
Income taxes receivable	—		48,344
Other assets	445,875		408,161
Total Assets	$	17,103,198	$	19,177,363
LIABILITIES AND SHAREHOLDERS' EQUITY
Senior long-term debt	$	3,686,892	$	4,034,223
Notes payable to subsidiaries	—		32,753
Income taxes payable	120,616		—
Net deferred tax liability	148,365		295,289
Other liabilities	81,791		97,748
Total Liabilities	4,037,664		4,460,013
Shareholders' equity:
Preferred stock	591,891		591,891
Common stock	3,493,893		3,441,079
Retained earnings	9,836,827		10,446,763
Accumulated other comprehensive income (loss)	(857,077)		237,617
Total Shareholders' Equity	13,065,534		14,717,350
Total Liabilities and Shareholders' Equity	$	17,103,198	$	19,177,363

Schedule Of Condensed Statements Of Income (Loss) And Comprehensive Income (Loss)

CONDENSED STATEMENTS OF INCOME (LOSS) AND COMPREHENSIVE INCOME (LOSS)

	Years Ended December 31,
	2022		2021		2020
	(dollars in thousands)
REVENUES
Net investment income	$	34,781	$	9,099	$	22,037
Dividends on common stock of consolidated subsidiaries	278,557		1,081,988		466,244
Net investment gains (losses):
Net realized investment gains	7,620		23,652		27,774
Change in fair value of equity securities	(397,906)		514,727		82,389
Net investment gains (losses)	(390,286)		538,379		110,163
Gain on sale of subsidiary	107,293		—		—
Other revenues (losses)	(29,487)		11,078		(4,011)
Total Revenues	858		1,640,544		594,433
EXPENSES
Services and other expenses	111,848		22,379		1,025
Interest expense	172,125		185,568		187,562
Net foreign exchange losses (gains)	(13,143)		(6,236)		6,823
Total Expenses	270,830		201,711		195,410
Income (Loss) Before Equity in Undistributed Earnings (Losses) of Consolidated Subsidiaries and Income Taxes	(269,972)		1,438,833		399,023
Equity in undistributed earnings (losses) of consolidated subsidiaries	(69,971)		1,081,976		400,289
Income tax (expense) benefit	125,820		(95,806)		16,718
Net Income (Loss) to Shareholders	(214,123)		2,425,003		816,030
Preferred stock dividends	(36,000)		(36,000)		(18,400)
Net Income (Loss) to Common Shareholders	$	(250,123)	$	2,389,003	$	797,630
OTHER COMPREHENSIVE INCOME (LOSS) TO SHAREHOLDERS
Change in net unrealized gains (losses) on available-for-sale investments, net of taxes:
Net holding gains (losses) arising during the period	$	(24,465)	$	(5,885)	$	21,482
Consolidated subsidiaries' net holding gains (losses) arising during the period	(1,130,589)		(342,430)		334,677
Reclassification adjustments for net gains (losses) included in net income (loss) to shareholders	1,965		(34)		(14,937)
Consolidated subsidiaries' reclassification adjustments for net gains (losses) included in net income (loss) to shareholders	42,941		(6,589)		11,551
Change in net unrealized gains (losses) on available-for-sale investments, net of taxes	(1,110,148)		(354,938)		352,773
Consolidated subsidiaries' change in foreign currency translation adjustments, net of taxes	(9,276)		(211)		29,829
Consolidated subsidiaries' change in net actuarial pension loss, net of taxes	24,730		8,390		(6,998)
Total Other Comprehensive Income (Loss) to Shareholders	(1,094,694)		(346,759)		375,604
Comprehensive Income (Loss) to Shareholders	$	(1,308,817)	$	2,078,244	$	1,191,634

Schedule Of Condensed Statements Of Cash Flows

CONDENSED STATEMENTS OF CASH FLOWS

	Years Ended December 31,
	2022		2021		2020
	(dollars in thousands)
OPERATING ACTIVITIES
Net income (loss) to shareholders	$	(214,123)	$	2,425,003	$	816,030
Adjustments to reconcile net income (loss) to shareholders to net cash provided by operating activities	487,259		(2,213,261)		(708,162)
Net Cash Provided By Operating Activities	273,136		211,742		107,868
INVESTING ACTIVITIES
Proceeds from sales, maturities, calls and prepayments of fixed maturity securities	13,047		37,607		319,502
Proceeds from sales of equity securities	65,379		105,700		276,637
Cost of equity securities purchased	(16,660)		(73,644)		(90,459)
Net change in short-term investments	58,970		(224,646)		(522,666)
Return of capital from subsidiaries	—		17,193		15,164
Decrease (increase) in notes receivable due from subsidiaries	75,645		(50,000)		(25,000)
Capital contributions to subsidiaries (1)	(94,585)		(271,729)		(605,426)
Proceeds from sale of subsidiary	165,615		—		—
Cost of equity method investments	—		(38,550)		(4,917)
Other	4,779		(5,368)		17,984
Net Cash Provided (Used) By Investing Activities	272,190		(503,437)		(619,181)
FINANCING ACTIVITIES
Repayment of senior long-term debt	(350,000)		—		—
Additions to senior long-term debt	—		591,354		—
Decrease in notes payable to subsidiaries	(32,753)		—		(50,000)
Repurchases of common stock	(290,796)		(206,518)		(26,832)
Issuance of preferred stock, net	—		—		591,891
Dividends paid on preferred stock	(36,000)		(36,000)		(18,400)
Other	—		(1,181)		15
Net Cash Provided (Used) By Financing Activities	(709,549)		347,655		496,674
Increase (decrease) in cash, cash equivalents, restricted cash and restricted cash equivalents	(164,223)		55,960		(14,639)
Cash, cash equivalents, restricted cash and restricted cash equivalents at beginning of year	779,470		723,510		738,149
CASH, CASH EQUIVALENTS, RESTRICTED CASH AND RESTRICTED CASH EQUIVALENTS AT END OF YEAR	$	615,247	$	779,470	$	723,510

(1)    The holding company made non-cash capital contributions in the form of investments to its subsidiaries totaling $924.0 million and $49.5 million for the years ended December 31, 2022 and 2020, respectively. There were no non-cash capital contributions made to subsidiaries for the year ended December 31, 2021.

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Summary Of Significant Accounting Policies (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Accounting Policies [Abstract]
Deferred policy acquisition cost amortization period	1 year
Property, plant and equipment, net	$ 1,200.0	$ 1,100.0
Inventory, net	$ 639.6	$ 529.3
Tax benefit greater than 50%	50.00%
Insurance premiums revenue recognition period	1 year

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Summary of Significant Accounting Policies (Investments) (Details)	12 Months Ended
	Dec. 31, 2022
Minimum [Member] | Fixed maturities [Member]
Schedule of Investments [Line Items]
Investment maturity period	1 year
Maximum [Member] | Short-term investments [Member]
Schedule of Investments [Line Items]
Investment maturity period	1 year

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Summary of Significant Accounting Policies (Cash and Cash Equivalents) (Details)	12 Months Ended
	Dec. 31, 2022
Maximum [Member] | Cash and cash equivalents [Member]
Cash and Cash Equivalents [Line Items]
Investment maturity period	90 days

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Summary of Significant Accounting Policies (Goodwill and Intangible Assets) (Details)	12 Months Ended
	Dec. 31, 2022
Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, estimated useful life	5 years
Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, estimated useful life	20 years

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Summary Of Significant Accounting Policies (Recent Accounting Pronouncements) (Details) - USD ($) $ in Millions	Jan. 01, 2023	Jan. 01, 2021
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Impact to accumulated other comprehensive income, net of taxes, as a result of changing the discount rate assumption under ASU 2018-12		$ (15.3)
Cumulative impact to accumulated other comprehensive income, net of taxes, as a result of adopting ASU 2018-12	$ 89.6

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Segment Reporting Disclosures (Narrative) (Details)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Underwriting Operations [Member] | United States [Member]
Revenue, Major Customer [Line Items]
Percentage of gross premiums written	80.00%	80.00%	79.00%
Markel Ventures [Member] | United States [Member]
Revenue, Major Customer [Line Items]
Percentage of revenue attributable to U.S.	96.00%	95.00%	95.00%
Top Three Independent Brokers | Underwriting Operations [Member]
Revenue, Major Customer [Line Items]
Percentage of gross premiums written	28.00%	28.00%	31.00%
Top Three Independent Brokers | Insurance [Member]
Revenue, Major Customer [Line Items]
Percentage of gross premiums written	19.00%	19.00%	20.00%
Top Three Independent Brokers | Reinsurance [Member]
Revenue, Major Customer [Line Items]
Percentage of gross premiums written	88.00%	84.00%	84.00%

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Segment Reporting Disclosures (Company's Segment Disclosures) (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2022		Dec. 31, 2021		Dec. 31, 2020
Segment Reporting Information [Line Items]
Gross written premiums		$ 13,201,682		$ 11,438,682		$ 9,266,665
Net written premiums		8,203,390		7,119,731		5,932,238
Earned premiums		7,587,792		6,503,029		5,612,205
Losses and loss adjustment expenses, current accident year		(4,613,035)		(4,061,000)		(4,073,325)
Losses and loss adjustment expenses, prior accident years		167,446		479,795		606,364
Amortization of policy acquisition costs		(1,655,106)		(1,419,266)		(1,229,161)
Other operating expenses		(860,477)		(874,473)		(788,466)
Underwriting profit (loss)		626,620		628,085		127,617
Net investment income		446,755		367,417		375,826
Net investment gains (losses)		(1,595,733)		1,978,534		617,979
Products revenues		2,427,096		1,712,120		1,439,515
Services and other revenues		2,809,425		2,285,325		1,689,541
Products expenses		(2,241,736)		(1,544,506)		(1,256,159)
Services and other expenses		(2,306,635)		(2,022,935)		(1,561,120)
Amortization of intangible assets		(178,778)	[1]	(160,539)	[2]	(159,315)	[3]
Impairment of goodwill		(80,000)		0		0
Segment profit (loss)		(92,986)		3,243,501		1,273,884
Interest expense		(196,062)		(183,579)		(177,582)
Net foreign exchange gains (losses)		140,209		72,271		(95,853)
Income (Loss) Before Income Taxes		(148,839)		3,132,193		1,000,449
Insurance [Member]
Segment Reporting Information [Line Items]
Gross written premiums		8,606,700		7,239,676		6,029,024
Net written premiums		7,040,176		5,998,890		4,977,662
Earned premiums		6,528,263		5,465,284		4,688,448
Losses and loss adjustment expenses, current accident year		(3,936,425)		(3,311,185)		(3,373,085)
Losses and loss adjustment expenses, prior accident years		142,924		506,292		554,586
Amortization of policy acquisition costs		(1,375,539)		(1,153,049)		(988,668)
Other operating expenses		(809,352)		(810,929)		(712,280)
Underwriting profit (loss)		549,871		696,413		169,001
Net investment income		0		0		0
Net investment gains (losses)		0		0		0
Products revenues		0				0
Services and other revenues		0		0		0
Products expenses		0		0		0
Services and other expenses		0		0		0
Amortization of intangible assets		0	[1]	0	[2]	0	[3]
Impairment of goodwill		0
Segment profit (loss)		549,871		696,413		169,001
Reinsurance [Member]
Segment Reporting Information [Line Items]
Gross written premiums		1,229,851		1,246,143		1,130,923
Net written premiums		1,167,312		1,126,167		960,123
Earned premiums		1,063,347		1,042,048		929,348
Losses and loss adjustment expenses, current accident year		(676,610)		(749,815)		(700,240)
Losses and loss adjustment expenses, prior accident years		26,052		(19,928)		51,755
Amortization of policy acquisition costs		(279,567)		(266,217)		(240,493)
Other operating expenses		(49,363)		(61,326)		(74,379)
Underwriting profit (loss)		83,859		(55,238)		(34,009)
Net investment income		0		0		0
Net investment gains (losses)		0		0		0
Products revenues		0				0
Services and other revenues		0		0		0
Products expenses		0		0		0
Services and other expenses		0		109		(41,461)
Amortization of intangible assets		0	[1]	0	[2]	0	[3]
Impairment of goodwill		0
Segment profit (loss)		83,859		(55,129)		(75,470)
Investing [Member]
Segment Reporting Information [Line Items]
Gross written premiums		0		0		0
Net written premiums		0		0		0
Earned premiums		0		0		0
Losses and loss adjustment expenses, current accident year		0		0		0
Losses and loss adjustment expenses, prior accident years		0		0		0
Amortization of policy acquisition costs		0		0		0
Other operating expenses		0		0		0
Underwriting profit (loss)		0		0		0
Net investment income		445,846		367,406		375,581
Net investment gains (losses)		(1,595,733)		1,978,534		617,979
Products revenues		0				0
Services and other revenues		(17,661)		7,184		(3,996)
Products expenses		0		0		0
Services and other expenses		0		0		0
Amortization of intangible assets		0	[1]	0	[2]	0	[3]
Impairment of goodwill		0
Segment profit (loss)		(1,167,548)		2,353,124		989,564
Markel Ventures [Member]
Segment Reporting Information [Line Items]
Gross written premiums		0		0		0
Net written premiums		0		0		0
Earned premiums		0		0		0
Losses and loss adjustment expenses, current accident year		0		0		0
Losses and loss adjustment expenses, prior accident years		0		0		0
Amortization of policy acquisition costs		0		0		0
Other operating expenses		0		0		0
Underwriting profit (loss)		0		0		0
Net investment income		909		11		245
Net investment gains (losses)		0		0		0
Products revenues		2,427,096		1,712,120		1,439,515
Services and other revenues		2,329,522		1,931,696		1,355,199
Products expenses		(2,241,736)		(1,544,506)		(1,256,159)
Services and other expenses		(2,111,510)		(1,769,201)		(1,232,150)
Amortization of intangible assets		(79,043)	[1]	(57,568)	[2]	(52,572)	[3]
Impairment of goodwill		0
Segment profit (loss)		325,238		272,552		254,078
Interest expense	[4]	(46,780)		(35,031)		(46,664)
Other [Member]
Segment Reporting Information [Line Items]
Gross written premiums		3,365,131	[5]	2,952,863	[6]	2,106,718	[7]
Net written premiums		(4,098)	[5]	(5,326)	[6]	(5,547)	[7]
Earned premiums		(3,818)	[5]	(4,303)	[6]	(5,591)	[7]
Losses and loss adjustment expenses, current accident year		0	[5]	0	[6]	0	[7]
Losses and loss adjustment expenses, prior accident years		(1,530)	[5]	(6,569)	[6]	23	[7]
Amortization of policy acquisition costs		0	[5]	0	[6]	0	[7]
Other operating expenses		(1,762)	[5]	(2,218)	[6]	(1,807)	[7]
Underwriting profit (loss)		(7,110)	[5]	(13,090)	[6]	(7,375)	[7]
Net investment income		0	[5]	0	[6]	0	[7]
Net investment gains (losses)		0	[5]	0	[6]	0	[7]
Products revenues		0	[6]			0	[7]
Services and other revenues		497,564	[5]	346,445	[6]	338,338	[7]
Products expenses		0	[5]	0	[6]	0	[7]
Services and other expenses		(195,125)	[5]	(253,843)	[6]	(287,509)	[7]
Amortization of intangible assets		(99,735)	[1],[5]	(102,971)	[2],[6]	(106,743)	[3],[7]
Impairment of goodwill	[5]	(80,000)
Segment profit (loss)		115,594	[5]	(23,459)	[6]	(63,289)	[7]
Underwriting [Member]
Segment Reporting Information [Line Items]
Amortization of intangible assets		$ 38,533	[1],[5],[8]	$ 41,182	[2],[6],[8]	$ 41,900	[3],[7]

[1] Segment profit for the Markel Ventures segment includes amortization of intangible assets attributable to Markel Ventures. Amortization of intangible assets attributable to the Company's underwriting segments, included in Other, was $38.5 million for the year ended December 31, 2022.

[2] Segment profit for the Markel Ventures segment includes amortization of intangible assets attributable to Markel Ventures. Amortization of intangible assets attributable to the Company's underwriting segments, included in Other, was $41.2 million for the year ended December 31, 2021.

[3] Segment profit for the Markel Ventures segment includes amortization of intangible assets attributable to Markel Ventures. Amortization of intangible assets attributable to the Company's underwriting segments, included in Other, was $41.9 million for the year ended December 31, 2020.

[4] Interest expense for the years ended December 31, 2022, 2021 and 2020 included intercompany interest expense of $27.4 million, $25.8 million and $32.0 million, respectively, which was eliminated in consolidation.

[5] Other represents the total profit (loss) attributable to the Company's operations that are not included in a reportable segment, as well as amortization of intangible assets attributable to the underwriting segments, which is not allocated between the Insurance and Reinsurance segments.

[6] Other represents the total profit (loss) attributable to the Company's operations that are not included in a reportable segment, as well as amortization of intangible assets attributable to the underwriting segments, which is not allocated between the Insurance and Reinsurance segments.

[7] Other represents the total profit (loss) attributable to the Company's operations that are not included in a reportable segment, as well as amortization of intangible assets attributable to the underwriting segments, which is not allocated between the Insurance and Reinsurance segments.

[8] Amounts included in Underwriting reflect the intangible assets associated with the Company's underwriting segments, which are not allocated between the Insurance and Reinsurance segments.

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Segment Reporting Disclosures ( Summary of Additional Measures for Markel Ventures) (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Segment Reporting Information [Line Items]
Interest expense		$ 196,062	$ 183,579	$ 177,582
Income tax (expense) benefit		(47,636)	684,458	168,682
Markel Ventures [Member]
Segment Reporting Information [Line Items]
Depreciation		102,055	72,580	60,284
Interest expense	[1]	46,780	35,031	46,664
Income tax (expense) benefit		61,588	43,626	45,815
Capital expenditure, MV		225,230	124,451	75,404
Intercompany interest expense	[1]	$ 27,400	$ 25,800	$ 32,000

[1] Interest expense for the years ended December 31, 2022, 2021 and 2020 included intercompany interest expense of $27.4 million, $25.8 million and $32.0 million, respectively, which was eliminated in consolidation.

XML

Segment Reporting Disclosures (Summary Of Segment Revenue By Product) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022		Dec. 31, 2021		Dec. 31, 2020
Product Information [Line Items]
Earned premiums	$ 7,587,792		$ 6,503,029		$ 5,612,205
Products revenues	2,427,096		1,712,120		1,439,515
Services and other revenues	2,809,425		2,285,325		1,689,541
Total products revenues and services and other revenues	11,675,335		12,846,425		9,735,066
Insurance [Member]
Product Information [Line Items]
Earned premiums	6,528,263		5,465,284		4,688,448
Products revenues	0				0
Services and other revenues	0		0		0
Insurance [Member] | General liability [Member]
Product Information [Line Items]
Earned premiums	1,927,721		1,564,221		1,261,411
Insurance [Member] | Professional Liability [Member]
Product Information [Line Items]
Earned premiums	1,739,983		1,523,536		1,141,034
Insurance [Member] | Property [Member]
Product Information [Line Items]
Earned premiums	428,563		362,637		356,934
Insurance [Member] | Marine and energy [Member]
Product Information [Line Items]
Earned premiums	585,885		495,897		458,050
Insurance [Member] | Personal Lines [Member]
Product Information [Line Items]
Earned premiums	489,648		451,095		405,210
Insurance [Member] | Programs [Member]
Product Information [Line Items]
Earned premiums	384,952		222,410		238,909
Insurance [Member] | Workers' Compensation [Member]
Product Information [Line Items]
Earned premiums	385,054		354,337		338,186
Insurance [Member] | Credit and surety [Member]
Product Information [Line Items]
Earned premiums	193,701		161,155		151,397
Insurance [Member] | Other products [Member]
Product Information [Line Items]
Earned premiums	392,756		329,996		337,317
Reinsurance [Member]
Product Information [Line Items]
Earned premiums	1,063,347		1,042,048		929,348
Products revenues	0				0
Services and other revenues	0		0		0
Reinsurance [Member] | General liability [Member]
Product Information [Line Items]
Earned premiums	382,482		314,699		195,468
Reinsurance [Member] | Professional Liability [Member]
Product Information [Line Items]
Earned premiums	398,839		320,646		243,645
Reinsurance [Member] | Property [Member]
Product Information [Line Items]
Earned premiums	6,993		129,760		191,968
Reinsurance [Member] | Specialty [Member]
Product Information [Line Items]
Earned premiums	275,033		276,943		298,267
Other [Member]
Product Information [Line Items]
Earned premiums	(3,818)	[1]	(4,303)	[2]	(5,591)	[3]
Products revenues	0	[2]			0	[3]
Services and other revenues	497,564	[1]	346,445	[2]	338,338	[3]
Markel Ventures [Member]
Product Information [Line Items]
Earned premiums	0		0		0
Products revenues	2,427,096		1,712,120		1,439,515
Services and other revenues	2,329,522		1,931,696		1,355,199
Total products revenues and services and other revenues	4,756,618		3,643,816		2,794,714
Markel Ventures [Member] | Consumer and building
Product Information [Line Items]
Products revenues	1,510,130		911,422		814,697
Markel Ventures [Member] | Transportation-related
Product Information [Line Items]
Products revenues	612,467		474,839		351,559
Markel Ventures [Member] | Equipment manufacturing
Product Information [Line Items]
Products revenues	304,499		325,859		273,259
Markel Ventures [Member] | Construction
Product Information [Line Items]
Services and other revenues	1,910,403		1,554,592		915,696
Markel Ventures [Member] | Consulting
Product Information [Line Items]
Services and other revenues	326,549		277,902		283,386
Markel Ventures [Member] | Other services
Product Information [Line Items]
Services and other revenues	92,570		99,202		156,117
Underwriting Operations [Member]
Product Information [Line Items]
Earned premiums	$ 7,591,495		$ 6,507,441		$ 5,617,626

[1] Other represents the total profit (loss) attributable to the Company's operations that are not included in a reportable segment, as well as amortization of intangible assets attributable to the underwriting segments, which is not allocated between the Insurance and Reinsurance segments.

[2] Other represents the total profit (loss) attributable to the Company's operations that are not included in a reportable segment, as well as amortization of intangible assets attributable to the underwriting segments, which is not allocated between the Insurance and Reinsurance segments.

[3] Other represents the total profit (loss) attributable to the Company's operations that are not included in a reportable segment, as well as amortization of intangible assets attributable to the underwriting segments, which is not allocated between the Insurance and Reinsurance segments.

XML

Segment Reporting Disclosures (Reconciliation Of Segment Assets To The Company's Consolidated Balance Sheets) (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Segment Reporting Information [Line Items]
Assets	$ 49,791,259	$ 48,477,096
Investing [Member]
Segment Reporting Information [Line Items]
Assets	26,982,280	28,277,801
Underwriting Operations [Member]
Segment Reporting Information [Line Items]
Assets	8,853,559	8,111,316
Markel Ventures [Member]
Segment Reporting Information [Line Items]
Assets	5,315,677	4,958,279
Other [Member]
Segment Reporting Information [Line Items]
Assets	8,639,743	7,129,700
Segment Assets [Member]
Segment Reporting Information [Line Items]
Assets	$ 41,151,516	$ 41,347,396

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Segment Reporting Disclosures (Summary Of Deferred Policy Acquisition Costs, Unearned Premiums And Unpaid Losses And Loss Adjustment Expenses) (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Deferred policy acquisition costs	$ 925,483	$ 794,145
Unearned premiums	6,220,748	5,383,619
Unpaid losses and loss adjustment expenses	20,947,898	18,178,894	$ 16,222,376	$ 14,728,676
Insurance [Member]
Segment Reporting Information [Line Items]
Deferred policy acquisition costs	677,921	574,181
Unearned premiums	4,015,252	3,350,054
Unpaid losses and loss adjustment expenses	11,616,386	10,051,994
Reinsurance [Member]
Segment Reporting Information [Line Items]
Deferred policy acquisition costs	247,562	219,964
Unearned premiums	921,541	802,824
Unpaid losses and loss adjustment expenses	3,581,699	3,639,210
Other underwriting [Member]
Segment Reporting Information [Line Items]
Deferred policy acquisition costs	0	0
Unearned premiums	9,473	0
Unpaid losses and loss adjustment expenses	197,602	271,356
Underwriting Operations [Member]
Segment Reporting Information [Line Items]
Deferred policy acquisition costs	925,483	794,145
Unearned premiums	4,946,266	4,152,878
Unpaid losses and loss adjustment expenses	15,395,687	13,962,560
Program services and other fronting [Member]
Segment Reporting Information [Line Items]
Deferred policy acquisition costs	0	0
Unearned premiums	1,274,482	1,230,741
Unpaid losses and loss adjustment expenses	5,204,290	$ 4,216,334
Market CATCo Re
Segment Reporting Information [Line Items]
Deferred policy acquisition costs	0
Unearned premiums	0
Unpaid losses and loss adjustment expenses	$ 347,921

XML

Acquisitions and Dispositions (Narrative) (Details) - USD ($) $ in Thousands						12 Months Ended
	Oct. 01, 2022	Feb. 01, 2022	Dec. 21, 2021	Aug. 31, 2021	Apr. 30, 2020	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Schedule of Business Dispositions, by Dispositions [Line Items]
Gain on sale of business						$ 225,832	$ 22,085	$ 0
Business Acquisition [Line Items]
Adjustments to preliminary purchase price allocation						86,773
Goodwill, Adjustments to preliminary purchase price allocation						$ 83,358
Volante [Member]
Schedule of Business Dispositions, by Dispositions [Line Items]
Total sale consideration	$ 181,900
Proceeds from sale of business	155,600
Gain on sale of business	$ 118,500
Velocity [Member]
Schedule of Business Dispositions, by Dispositions [Line Items]
Total sale consideration		$ 181,300
Proceeds from sale of business		165,600
Gain on sale of business		107,300
Business combination, disposition of less than 100 percent, noncontrolling interest, fair value		$ 47,400
Metromont LLC [Member]
Business Acquisition [Line Items]
Percentage acquired			51.00%
Total purchase consideration			$ 274,500
Cash consideration			274,500
Goodwill recognized			101,600
Goodwill, tax deductible			51,800
Total intangible assets			230,000
Noncontrolling interests			247,400
Adjustments to preliminary purchase price allocation			86,100
Goodwill, Adjustments to preliminary purchase price allocation			(117,700)
Noncontrolling interest, Adjustments to preliminary purchase price allocation			(22,500)
Metromont LLC [Member] | Customer Relationships [Member]
Business Acquisition [Line Items]
Finite-lived intangible assets			$ 175,000
Definite-lived intangible assets, weighted-average amortization period			17 years
Metromont LLC [Member] | Trade Names [Member]
Business Acquisition [Line Items]
Finite-lived intangible assets			$ 55,000
Definite-lived intangible assets, weighted-average amortization period			15 years
Buckner HeavyLift Cranes [Member]
Business Acquisition [Line Items]
Percentage acquired				90.00%
Total purchase consideration				$ 237,900
Cash consideration				237,900
Goodwill recognized				109,900
Goodwill, tax deductible				0
Total intangible assets				60,000
Noncontrolling interests				26,400
Fixed assets				290,400
Long-term debt				165,100
Goodwill, Adjustments to preliminary purchase price allocation				35,300
Fixed assets, Adjustments to preliminary purchase price allocation				(42,200)
Buckner HeavyLift Cranes [Member] | Customer Relationships [Member]
Business Acquisition [Line Items]
Finite-lived intangible assets				$ 50,000
Definite-lived intangible assets, weighted-average amortization period				7 years
Buckner HeavyLift Cranes [Member] | Trade Names [Member]
Business Acquisition [Line Items]
Finite-lived intangible assets				$ 10,000
Definite-lived intangible assets, weighted-average amortization period				15 years
Lansing Building Products, LLC [Member]
Business Acquisition [Line Items]
Percentage acquired					91.00%
Total purchase consideration					$ 559,200
Cash consideration					559,200
Goodwill recognized					287,100
Goodwill, tax deductible					0
Total intangible assets					210,000
Noncontrolling interests					43,600
Lansing Building Products, LLC [Member] | Customer Relationships [Member]
Business Acquisition [Line Items]
Finite-lived intangible assets					$ 188,000
Definite-lived intangible assets, weighted-average amortization period					16 years
Lansing Building Products, LLC [Member] | Trade Names [Member]
Business Acquisition [Line Items]
Finite-lived intangible assets					$ 22,000
Definite-lived intangible assets, weighted-average amortization period					14 years

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Investments (Narrative) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2022 USD ($) securities	Dec. 31, 2021 USD ($) securities	Dec. 31, 2020 USD ($)
Debt Securities, Available-for-sale [Line Items]
Available-for-sale fixed maturity securities in unrealized loss position, number of positions | securities	1,400	277
Available-for-sale fixed maturity securities in unrealized loss position, number of positions, 12 months or longer | securities	246	13
Available-for-sale fixed maturity securities, estimated fair value	$ 11,280,896	$ 4,285,088
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	962,210	63,193
Available-for-sale fixed maturity securities, estimated fair value, 12 months or longer	3,356,273	169,794
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ 393,911	$ 6,048
Estimated average duration of fixed maturities	3 years 10 months 24 days
Percentage threshold of shareholders' equity used to define concentration of investments	10.00%	10.00%	10.00%
Investments, Available-for-sale, Allowance for Credit Loss	$ 0	$ 0	$ 0
Fixed maturities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale fixed maturity securities, estimated fair value	10,506,416	4,056,218
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	962,152	57,853
Available-for-sale fixed maturity securities, estimated fair value, 12 months or longer	3,356,273	169,794
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ 393,911	$ 6,048

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Investments (Available-For-Sale Investments) (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Debt Securities, Available-for-sale [Line Items]
Fixed maturities, amortized cost	$ 12,805,887	$ 12,061,467
Available-for-sale fixed maturity investments, gross unrealized holding gains	13,100	583,691
Available-for-sale fixed maturity investments, gross unrealized holding losses	(962,152)	(57,853)
Available-for-sale fixed maturity investments, estimated fair value	11,856,835	12,587,305
Short-term investments, available-for-sale, amortized cost basis	2,663,560	1,805,300
Short-term investments, available-for-sale, accumulated gross unrealized gain before tax	5,760	28
Short-term investments, available-for-sale, accumulated gross unrealized loss before tax	(58)	(5,340)
Short-term investments, available-for-sale	2,669,262	1,799,988
Investments, available-for-sale, amortized cost basis	15,469,447	13,866,767
Investments, available-for-sale, accumulated gross unrealized gain before tax	18,860	583,719
Investments, available-for-sale, accumulated gross unrealized loss before tax	(962,210)	(63,193)
Investments, available-for-sale	14,526,097	14,387,293
Investments, Available-for-sale, Allowance for Credit Loss	0	0	$ 0
U.S. Treasury securities [Member]
Debt Securities, Available-for-sale [Line Items]
Fixed maturities, amortized cost	3,050,089	2,489,032
Available-for-sale fixed maturity investments, gross unrealized holding gains	2,363	2,633
Available-for-sale fixed maturity investments, gross unrealized holding losses	(138,493)	(21,471)
Available-for-sale fixed maturity investments, estimated fair value	2,913,959	2,470,194
U.S. government-sponsored enterprises [Member]
Debt Securities, Available-for-sale [Line Items]
Fixed maturities, amortized cost	871,463	753,029
Available-for-sale fixed maturity investments, gross unrealized holding gains	154	28,997
Available-for-sale fixed maturity investments, gross unrealized holding losses	(106,079)	(6,439)
Available-for-sale fixed maturity investments, estimated fair value	765,538	775,587
Obligations of states, municipalities and political subdivisions [Member]
Debt Securities, Available-for-sale [Line Items]
Fixed maturities, amortized cost	3,973,911	4,007,211
Available-for-sale fixed maturity investments, gross unrealized holding gains	6,503	266,575
Available-for-sale fixed maturity investments, gross unrealized holding losses	(247,231)	(7,862)
Available-for-sale fixed maturity investments, estimated fair value	3,733,183	4,265,924
Foreign governments [Member]
Debt Securities, Available-for-sale [Line Items]
Fixed maturities, amortized cost	1,473,658	1,394,771
Available-for-sale fixed maturity investments, gross unrealized holding gains	2,843	134,071
Available-for-sale fixed maturity investments, gross unrealized holding losses	(169,723)	(9,488)
Available-for-sale fixed maturity investments, estimated fair value	1,306,778	1,519,354
Commercial mortgage-backed securities [Member]
Debt Securities, Available-for-sale [Line Items]
Fixed maturities, amortized cost	2,109,721	1,928,775
Available-for-sale fixed maturity investments, gross unrealized holding gains	395	69,810
Available-for-sale fixed maturity investments, gross unrealized holding losses	(169,668)	(8,152)
Available-for-sale fixed maturity investments, estimated fair value	1,940,448	1,990,433
Residential mortgage-backed securities [Member]
Debt Securities, Available-for-sale [Line Items]
Fixed maturities, amortized cost	553,591	699,136
Available-for-sale fixed maturity investments, gross unrealized holding gains	6	27,084
Available-for-sale fixed maturity investments, gross unrealized holding losses	(26,804)	(170)
Available-for-sale fixed maturity investments, estimated fair value	526,793	726,050
Asset-backed securities [Member]
Debt Securities, Available-for-sale [Line Items]
Fixed maturities, amortized cost	1,693	3,035
Available-for-sale fixed maturity investments, gross unrealized holding gains	0	46
Available-for-sale fixed maturity investments, gross unrealized holding losses	(53)	0
Available-for-sale fixed maturity investments, estimated fair value	1,640	3,081
Corporate bonds [Member]
Debt Securities, Available-for-sale [Line Items]
Fixed maturities, amortized cost	771,761	786,478
Available-for-sale fixed maturity investments, gross unrealized holding gains	836	54,475
Available-for-sale fixed maturity investments, gross unrealized holding losses	(104,101)	(4,271)
Available-for-sale fixed maturity investments, estimated fair value	$ 668,496	$ 836,682

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Investments (Summary Of Gross Unrealized Investment Losses By Length Of Time That Securities Have Continuously Been In An Unrealized Loss Position) (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Debt Securities, Available-for-sale [Line Items]
Available-for-sale fixed maturity securities, estimated fair value, less than 12 months	$ 7,924,623	$ 4,115,294
Available-for-sale fixed maturity securities, gross unrealized holding, less than 12 months	(568,299)	(57,145)
Available-for-sale fixed maturity securities, estimated fair value, 12 months or longer	3,356,273	169,794
Available-for-sale fixed maturity securities, gross unrealized holding losses, 12 months or longer	(393,911)	(6,048)
Available-for-sale fixed maturity securities, estimated fair value	11,280,896	4,285,088
Available-for-sale fixed maturity securities, gross unrealized holding losses	(962,210)	(63,193)
Short-term investments, available-for-sale, continuous unrealized loss position, less than 12 months	774,480	228,870
Short-term investments, available-for-sale, continuous unrealized loss position, less than 12 months, accumulated loss	(58)	(5,340)
Short-term investments, available-for-sale, continuous unrealized loss position, 12 months or longer	0	0
Short-term investments, available-for-sale, continuous unrealized loss position, 12 months or longer, accumulated loss	0	0
Short-term investments, available-for-sale, unrealized loss position, total	774,480	228,870
Short-term investments, available-for-sale, unrealized loss position, accumulated loss	(58)	(5,340)
U.S. Treasury securities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale fixed maturity securities, estimated fair value, less than 12 months	735,605	2,236,637
Available-for-sale fixed maturity securities, gross unrealized holding, less than 12 months	(30,583)	(18,433)
Available-for-sale fixed maturity securities, estimated fair value, 12 months or longer	1,907,922	97,173
Available-for-sale fixed maturity securities, gross unrealized holding losses, 12 months or longer	(107,910)	(3,038)
Available-for-sale fixed maturity securities, estimated fair value	2,643,527	2,333,810
Available-for-sale fixed maturity securities, gross unrealized holding losses	(138,493)	(21,471)
U.S. government-sponsored enterprises [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale fixed maturity securities, estimated fair value, less than 12 months	413,495	381,495
Available-for-sale fixed maturity securities, gross unrealized holding, less than 12 months	(40,488)	(5,640)
Available-for-sale fixed maturity securities, estimated fair value, 12 months or longer	331,391	14,010
Available-for-sale fixed maturity securities, gross unrealized holding losses, 12 months or longer	(65,591)	(799)
Available-for-sale fixed maturity securities, estimated fair value	744,886	395,505
Available-for-sale fixed maturity securities, gross unrealized holding losses	(106,079)	(6,439)
Obligations of states, municipalities and political subdivisions [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale fixed maturity securities, estimated fair value, less than 12 months	2,474,289	393,249
Available-for-sale fixed maturity securities, gross unrealized holding, less than 12 months	(164,537)	(6,941)
Available-for-sale fixed maturity securities, estimated fair value, 12 months or longer	348,943	23,589
Available-for-sale fixed maturity securities, gross unrealized holding losses, 12 months or longer	(82,694)	(921)
Available-for-sale fixed maturity securities, estimated fair value	2,823,232	416,838
Available-for-sale fixed maturity securities, gross unrealized holding losses	(247,231)	(7,862)
Foreign governments [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale fixed maturity securities, estimated fair value, less than 12 months	900,322	322,813
Available-for-sale fixed maturity securities, gross unrealized holding, less than 12 months	(115,324)	(8,596)
Available-for-sale fixed maturity securities, estimated fair value, 12 months or longer	300,423	25,564
Available-for-sale fixed maturity securities, gross unrealized holding losses, 12 months or longer	(54,399)	(892)
Available-for-sale fixed maturity securities, estimated fair value	1,200,745	348,377
Available-for-sale fixed maturity securities, gross unrealized holding losses	(169,723)	(9,488)
Commercial mortgage-backed securities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale fixed maturity securities, estimated fair value, less than 12 months	1,611,603	345,616
Available-for-sale fixed maturity securities, gross unrealized holding, less than 12 months	(117,482)	(7,765)
Available-for-sale fixed maturity securities, estimated fair value, 12 months or longer	305,217	9,189
Available-for-sale fixed maturity securities, gross unrealized holding losses, 12 months or longer	(52,186)	(387)
Available-for-sale fixed maturity securities, estimated fair value	1,916,820	354,805
Available-for-sale fixed maturity securities, gross unrealized holding losses	(169,668)	(8,152)
Residential mortgage-backed securities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale fixed maturity securities, estimated fair value, less than 12 months	516,423	12,828
Available-for-sale fixed maturity securities, gross unrealized holding, less than 12 months	(25,232)	(159)
Available-for-sale fixed maturity securities, estimated fair value, 12 months or longer	9,342	269
Available-for-sale fixed maturity securities, gross unrealized holding losses, 12 months or longer	(1,572)	(11)
Available-for-sale fixed maturity securities, estimated fair value	525,765	13,097
Available-for-sale fixed maturity securities, gross unrealized holding losses	(26,804)	(170)
Asset-backed securities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale fixed maturity securities, estimated fair value, less than 12 months	1,640
Available-for-sale fixed maturity securities, gross unrealized holding, less than 12 months	(53)
Available-for-sale fixed maturity securities, estimated fair value, 12 months or longer	0
Available-for-sale fixed maturity securities, gross unrealized holding losses, 12 months or longer	0
Available-for-sale fixed maturity securities, estimated fair value	1,640
Available-for-sale fixed maturity securities, gross unrealized holding losses	(53)
Corporate bonds [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale fixed maturity securities, estimated fair value, less than 12 months	496,766	193,786
Available-for-sale fixed maturity securities, gross unrealized holding, less than 12 months	(74,542)	(4,271)
Available-for-sale fixed maturity securities, estimated fair value, 12 months or longer	153,035	0
Available-for-sale fixed maturity securities, gross unrealized holding losses, 12 months or longer	(29,559)	0
Available-for-sale fixed maturity securities, estimated fair value	649,801	193,786
Available-for-sale fixed maturity securities, gross unrealized holding losses	(104,101)	(4,271)
Total fixed maturities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale fixed maturity securities, estimated fair value, less than 12 months	7,150,143	3,886,424
Available-for-sale fixed maturity securities, gross unrealized holding, less than 12 months	(568,241)	(51,805)
Available-for-sale fixed maturity securities, estimated fair value, 12 months or longer	3,356,273	169,794
Available-for-sale fixed maturity securities, gross unrealized holding losses, 12 months or longer	(393,911)	(6,048)
Available-for-sale fixed maturity securities, estimated fair value	10,506,416	4,056,218
Available-for-sale fixed maturity securities, gross unrealized holding losses	$ (962,152)	$ (57,853)

XML

Investments (Schedule Of Amortized Cost And Estimated Fair Value Of Fixed Maturities By Contractual Maturity) (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Debt Securities, Available-for-sale [Line Items]
Due in one year or less, amortized cost	$ 1,363,418
Due after one year through five years, amortized cost	3,926,756
Due after five years through ten years, amortized cost	3,115,913
Due after ten years, amortized cost	1,734,795
Amortized cost, sub-total	10,140,882
Fixed maturities, amortized cost	12,805,887	$ 12,061,467
Due in one year or less, estimated fair value	1,337,550
Due after one year through five years, estimated fair value	3,708,752
Due after five years through ten years, estimated fair value	2,787,686
Due after ten years, estimated fair value	1,553,966
Estimated fair value, sub-total	9,387,954
Available-for-sale fixed maturity investments, estimated fair value	11,856,835	12,587,305
Commercial mortgage-backed securities [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized cost	2,109,721
Fixed maturities, amortized cost	2,109,721	1,928,775
Estimated fair value	1,940,448
Available-for-sale fixed maturity investments, estimated fair value	1,940,448	1,990,433
Residential mortgage-backed securities [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized cost	553,591
Fixed maturities, amortized cost	553,591	699,136
Estimated fair value	526,793
Available-for-sale fixed maturity investments, estimated fair value	526,793	726,050
Asset-backed securities [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized cost	1,693
Fixed maturities, amortized cost	1,693	3,035
Estimated fair value	1,640
Available-for-sale fixed maturity investments, estimated fair value	$ 1,640	$ 3,081

XML

Investments (Components Of Net Investment Income) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Dividends on equity securities	$ 107,213	$ 98,099	$ 89,303
Total investment income	464,013	384,419	392,045
Investment expenses	(17,258)	(17,002)	(16,219)
Net investment income	446,755	367,417	375,826
Fixed maturities [Member]
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Interest income	294,417	283,366	288,421
Short-term investments [Member]
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Interest income	33,493	2,475	6,400
Cash and cash equivalents [Member]
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Interest income	$ 28,890	$ 479	$ 7,921

XML

Investments (Net Investment Gains (Losses) and Change in Net Unrealized Gains On Available-For-Sale Investments) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Gain (Loss) on Securities [Line Items]
Net realized investment gains (losses)	$ (40,983)	$ 37,908	$ 14,780
Change in fair value of equity securities sold during the period	(14,884)	25,902	(470,008)
Change in fair value of equity securities held at the end of the period	(1,539,866)	1,914,724	1,073,207
Change in fair value of equity securities	(1,554,750)	1,940,626	603,199
Net investment gains (losses)	(1,595,733)	1,978,534	617,979
Change in net unrealized gains on investments included in other comprehensive income (loss)	(1,407,316)	(450,096)	442,089
Reserve deficiency adjustment for life and annuity benefit reserves	56,560	62,988	(68,158)
Fixed maturities [Member]
Gain (Loss) on Securities [Line Items]
Change in net unrealized gains on investments included in other comprehensive income (loss)	(1,474,890)	(504,133)	507,903
Short-term investments [Member]
Gain (Loss) on Securities [Line Items]
Change in net unrealized gains on investments included in other comprehensive income (loss)	$ 11,014	$ (8,951)	$ 2,344

XML

Investments (Schedule Of Restricted Assets) (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Investments, Debt and Equity Securities [Abstract]
Investments	$ 4,160,842	$ 4,403,414
Restricted cash and cash equivalents	1,084,081	902,457
Total	$ 5,244,923	$ 5,305,871

XML

Investments Investments (Components Of Restricted Assets) (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Components Of Restricted Assets [Line Items]
Restricted assets	$ 5,244,923	$ 5,305,871
Assets held in trust or on deposit to support underwriting activities [Member]
Components Of Restricted Assets [Line Items]
Restricted assets	4,807,135	4,895,627
Assets pledged as security for letters of credit [Member]
Components Of Restricted Assets [Line Items]
Restricted assets	$ 437,788	$ 410,244

XML

Fair Value Measurements (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Assets And Liabilities, Level 1 To Level 2 Transfers, Amount	$ 0	$ 0
Fair Value, Assets And Liabilities, Level 2 To Level 1, Transfers Amount	0	0
Unconsolidated Markel CATCo Fund 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Redemption of remaining investment, Markel CATCo Re Fund	41,300
Fair Value, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure	0	0
Financial and Nonfinancial Liabilities, Fair Value Disclosure	$ 0	$ 0

XML

Fair Value Measurements (Balances Of Assets Measured At Fair Value On A Recurring Basis) (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale fixed maturity investments, estimated fair value	$ 11,856,835	$ 12,587,305
Equity securities	7,671,912	9,023,927
Short-term investments	2,669,262	1,799,988
Investments	22,198,009	23,411,220
U.S. Treasury securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale fixed maturity investments, estimated fair value	2,913,959	2,470,194
U.S. government-sponsored enterprises [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale fixed maturity investments, estimated fair value	765,538	775,587
Obligations of states, municipalities and political subdivisions [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale fixed maturity investments, estimated fair value	3,733,183	4,265,924
Foreign governments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale fixed maturity investments, estimated fair value	1,306,778	1,519,354
Commercial mortgage-backed securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale fixed maturity investments, estimated fair value	1,940,448	1,990,433
Residential mortgage-backed securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale fixed maturity investments, estimated fair value	526,793	726,050
Asset-backed securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale fixed maturity investments, estimated fair value	1,640	3,081
Corporate bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale fixed maturity investments, estimated fair value	668,496	836,682
Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale fixed maturity investments, estimated fair value	11,856,835	12,587,305
Equity securities	7,671,912	9,023,927
Short-term investments	2,669,262	1,799,988
Investments	22,198,009	23,411,220
Fair Value, Recurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale fixed maturity investments, estimated fair value	0	0
Equity securities	7,671,013	8,967,455
Short-term investments	2,510,164	1,619,496
Investments	10,181,177	10,586,951
Fair Value, Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale fixed maturity investments, estimated fair value	11,856,835	12,587,305
Equity securities	0	0
Short-term investments	159,098	180,492
Investments	12,015,933	12,767,797
Fair Value, Recurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale fixed maturity investments, estimated fair value	0	0
Equity securities	899	56,472
Short-term investments	0	0
Investments	899	56,472
Fair Value, Recurring [Member] | U.S. Treasury securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale fixed maturity investments, estimated fair value	2,913,959	2,470,194
Fair Value, Recurring [Member] | U.S. Treasury securities [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale fixed maturity investments, estimated fair value	0	0
Fair Value, Recurring [Member] | U.S. Treasury securities [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale fixed maturity investments, estimated fair value	2,913,959	2,470,194
Fair Value, Recurring [Member] | U.S. Treasury securities [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale fixed maturity investments, estimated fair value	0	0
Fair Value, Recurring [Member] | U.S. government-sponsored enterprises [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale fixed maturity investments, estimated fair value	765,538	775,587
Fair Value, Recurring [Member] | U.S. government-sponsored enterprises [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale fixed maturity investments, estimated fair value	0	0
Fair Value, Recurring [Member] | U.S. government-sponsored enterprises [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale fixed maturity investments, estimated fair value	765,538	775,587
Fair Value, Recurring [Member] | U.S. government-sponsored enterprises [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale fixed maturity investments, estimated fair value	0	0
Fair Value, Recurring [Member] | Obligations of states, municipalities and political subdivisions [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale fixed maturity investments, estimated fair value	3,733,183	4,265,924
Fair Value, Recurring [Member] | Obligations of states, municipalities and political subdivisions [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale fixed maturity investments, estimated fair value	0	0
Fair Value, Recurring [Member] | Obligations of states, municipalities and political subdivisions [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale fixed maturity investments, estimated fair value	3,733,183	4,265,924
Fair Value, Recurring [Member] | Obligations of states, municipalities and political subdivisions [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale fixed maturity investments, estimated fair value	0	0
Fair Value, Recurring [Member] | Foreign governments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale fixed maturity investments, estimated fair value	1,306,778	1,519,354
Fair Value, Recurring [Member] | Foreign governments [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale fixed maturity investments, estimated fair value	0	0
Fair Value, Recurring [Member] | Foreign governments [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale fixed maturity investments, estimated fair value	1,306,778	1,519,354
Fair Value, Recurring [Member] | Foreign governments [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale fixed maturity investments, estimated fair value	0	0
Fair Value, Recurring [Member] | Commercial mortgage-backed securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale fixed maturity investments, estimated fair value	1,940,448	1,990,433
Fair Value, Recurring [Member] | Commercial mortgage-backed securities [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale fixed maturity investments, estimated fair value	0	0
Fair Value, Recurring [Member] | Commercial mortgage-backed securities [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale fixed maturity investments, estimated fair value	1,940,448	1,990,433
Fair Value, Recurring [Member] | Commercial mortgage-backed securities [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale fixed maturity investments, estimated fair value	0	0
Fair Value, Recurring [Member] | Residential mortgage-backed securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale fixed maturity investments, estimated fair value	526,793	726,050
Fair Value, Recurring [Member] | Residential mortgage-backed securities [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale fixed maturity investments, estimated fair value	0	0
Fair Value, Recurring [Member] | Residential mortgage-backed securities [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale fixed maturity investments, estimated fair value	526,793	726,050
Fair Value, Recurring [Member] | Residential mortgage-backed securities [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale fixed maturity investments, estimated fair value	0	0
Fair Value, Recurring [Member] | Asset-backed securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale fixed maturity investments, estimated fair value	1,640	3,081
Fair Value, Recurring [Member] | Asset-backed securities [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale fixed maturity investments, estimated fair value	0	0
Fair Value, Recurring [Member] | Asset-backed securities [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale fixed maturity investments, estimated fair value	1,640	3,081
Fair Value, Recurring [Member] | Asset-backed securities [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale fixed maturity investments, estimated fair value	0	0
Fair Value, Recurring [Member] | Corporate bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale fixed maturity investments, estimated fair value	668,496	836,682
Fair Value, Recurring [Member] | Corporate bonds [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale fixed maturity investments, estimated fair value	0	0
Fair Value, Recurring [Member] | Corporate bonds [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale fixed maturity investments, estimated fair value	668,496	836,682
Fair Value, Recurring [Member] | Corporate bonds [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale fixed maturity investments, estimated fair value	0	0
Fair Value, Recurring [Member] | Insurance, banks and other financial institutions [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity securities	2,953,588	3,364,227
Fair Value, Recurring [Member] | Insurance, banks and other financial institutions [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity securities	2,952,689	3,307,755
Fair Value, Recurring [Member] | Insurance, banks and other financial institutions [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity securities	0	0
Fair Value, Recurring [Member] | Insurance, banks and other financial institutions [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity securities	899	56,472
Fair Value, Recurring [Member] | Industrial, consumer and all other [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity securities	4,718,324	5,659,700
Fair Value, Recurring [Member] | Industrial, consumer and all other [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity securities	4,718,324	5,659,700
Fair Value, Recurring [Member] | Industrial, consumer and all other [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity securities	0	0
Fair Value, Recurring [Member] | Industrial, consumer and all other [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity securities	$ 0	$ 0

XML

Fair Value Measurements (Summary Of Changes In Level 3 Investments Measured At Fair Value On A Recurring Basis) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Fair Value Disclosures [Abstract]
Equity securities, beginning of period	$ 56,472	$ 58,493
Purchases	0	18,900
Sales	(56,335)	(15,015)
Net investment gains (losses) on Level 3 investments	762	(5,906)
Equity securities, end of period	$ 899	$ 56,472
Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Net investment gains (losses)	Net investment gains (losses)

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Equity Method Investments (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Schedule of Equity Method Investments [Line Items]
Equity method investments	$ 494.0	$ 459.7
Income (loss) from equity method investments	(22.9)	15.0	$ (3.4)
Hagerty Group, LLC [Member]
Schedule of Equity Method Investments [Line Items]
Equity method investments	$ 245.1	$ 256.6
Equity method investment, ownership percentage	23.00%	23.00%
Equity method investment, quoted market value	$ 656.0	$ 1,100.0

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Receivables, Loans, Notes Receivable, and Others (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amounts receivable from agents, brokers and insureds	$ 2,176,295	$ 1,740,864
Other insurance	83,728	133,350
Markel Ventures	645,189	510,382
Other	77,961	50,379
Receivables, gross	2,983,173	2,434,975
Allowance for credit losses	(22,117)	(21,037)
Receivables	$ 2,961,056	$ 2,413,938

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Goodwill And Intangible Assets (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022		Dec. 31, 2021		Dec. 31, 2020
Goodwill And Intangible Assets [Line Items]
Impairment of goodwill	$ 80,000		$ 0		$ 0
Impairment of intangible assets (excluding goodwill)	0		0		0
Goodwill, carrying value	2,638,838	[1]	2,899,140	[1]	2,604,624
Amortizable intangible assets acquired	0
Amortization of intangible assets	178,778	[2]	160,539	[3]	$ 159,315	[4]
Estimated amortization of intangible assets for 2023	174,000
Estimated amortization of intangible assets for 2024	172,100
Estimated amortization of intangible assets for 2025	165,600
Estimated amortization of intangible assets for 2026	157,500
Estimated amortization of intangible assets for 2027	149,900
Indefinite-lived intangible assets	92,400		$ 92,400
Nephila Holdings Limited [Member]
Goodwill And Intangible Assets [Line Items]
Impairment of goodwill	80,000
Goodwill, carrying value	$ 221,800

[1] As of December 31, 2022, goodwill was net of accumulated impairment losses of $190.6 million, of which $171.9 million was in Other and $18.7 million was in Markel Ventures. As of December 31, 2021, goodwill was net of accumulated impairment losses of $110.6 million, of which $91.9 million was in Other and $18.7 million was in Markel Ventures.

[2] Segment profit for the Markel Ventures segment includes amortization of intangible assets attributable to Markel Ventures. Amortization of intangible assets attributable to the Company's underwriting segments, included in Other, was $38.5 million for the year ended December 31, 2022.

[3] Segment profit for the Markel Ventures segment includes amortization of intangible assets attributable to Markel Ventures. Amortization of intangible assets attributable to the Company's underwriting segments, included in Other, was $41.2 million for the year ended December 31, 2021.

[4] Segment profit for the Markel Ventures segment includes amortization of intangible assets attributable to Markel Ventures. Amortization of intangible assets attributable to the Company's underwriting segments, included in Other, was $41.9 million for the year ended December 31, 2020.

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Goodwill And Intangible Assets (Components Of Goodwill) (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2022		Dec. 31, 2021		Dec. 31, 2020
Goodwill [Line Items]
Goodwill, beginning balance		$ 2,899,140	[1]	$ 2,604,624
Acquisitions		41,905		293,838
Dispositions		(132,455)
Impairment of goodwill		(80,000)		0		$ 0
Adjustments to preliminary purchase price allocation		(83,358)
Foreign currency movements and other adjustments		(6,394)		678
Goodwill, ending balance		2,638,838	[1]	2,899,140	[1]	2,604,624
Accumulated impairment losses	[1]	190,600		110,600
Insurance [Member]
Goodwill [Line Items]
Goodwill, beginning balance		774,712	[1]	772,700
Acquisitions		0		0
Dispositions		0
Impairment of goodwill		0
Adjustments to preliminary purchase price allocation		0
Foreign currency movements and other adjustments		(3,084)		2,012
Goodwill, ending balance		771,628	[1]	774,712	[1]	772,700
Reinsurance [Member]
Goodwill [Line Items]
Goodwill, beginning balance		122,745	[1]	122,745
Acquisitions		0		0
Dispositions		0
Impairment of goodwill		0
Adjustments to preliminary purchase price allocation		0
Foreign currency movements and other adjustments		0		0
Goodwill, ending balance		122,745	[1]	122,745	[1]	122,745
Markel Ventures [Member]
Goodwill [Line Items]
Goodwill, beginning balance		1,196,590	[1]	901,045
Acquisitions		41,905		293,838
Dispositions		0
Impairment of goodwill		0
Adjustments to preliminary purchase price allocation		(83,358)
Foreign currency movements and other adjustments		(1,228)		1,707
Goodwill, ending balance		1,153,909	[1]	1,196,590	[1]	901,045
Accumulated impairment losses	[1]	18,700		18,700
Other Operations [Member]
Goodwill [Line Items]
Goodwill, beginning balance	[2]	805,093	[1]	808,134
Acquisitions	[2]	0		0
Dispositions	[2]	(132,455)
Impairment of goodwill	[2]	(80,000)
Adjustments to preliminary purchase price allocation	[2]	0
Foreign currency movements and other adjustments	[2]	(2,082)		(3,041)
Goodwill, ending balance	[2]	590,556	[1]	805,093	[1]	$ 808,134
Accumulated impairment losses	[1]	$ 171,900		$ 91,900

[1] As of December 31, 2022, goodwill was net of accumulated impairment losses of $190.6 million, of which $171.9 million was in Other and $18.7 million was in Markel Ventures. As of December 31, 2021, goodwill was net of accumulated impairment losses of $110.6 million, of which $91.9 million was in Other and $18.7 million was in Markel Ventures.

[2] Amounts included in Other reflect the Company's operations that are not included in a reportable segment and are primarily related to the Company's program services and insurance-linked securities operations.

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Goodwill And Intangible Assets Goodwill And Intangible Assets (Components of Net Intangible Assets) (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2022		Dec. 31, 2021		Dec. 31, 2020
Intangible [Line Items]
Net intangible assets, beginning balance		$ 1,822,486		$ 1,782,718
Acquisitions		21,614		203,879
Dispositions		(2,716)
Amortization of intangible assets		178,778	[1]	160,539	[2]	$ 159,315	[3]
Adjustments to preliminary purchase price allocation		86,773
Foreign currency movements and other adjustments		(1,915)		(3,572)
Net intangible assets, ending balance		1,747,464		1,822,486		1,782,718
Underwriting [Member]
Intangible [Line Items]
Net intangible assets, beginning balance	[4]	401,255		442,639
Acquisitions	[4]	0		0
Dispositions	[4]	0
Amortization of intangible assets		(38,533)	[1],[4],[5]	(41,182)	[2],[4],[6]	(41,900)	[3],[7]
Adjustments to preliminary purchase price allocation	[4]	0
Foreign currency movements and other adjustments	[4]	(400)		(202)
Net intangible assets, ending balance	[4]	362,322		401,255		442,639
Markel Ventures [Member]
Intangible [Line Items]
Net intangible assets, beginning balance		766,179		623,120
Acquisitions		21,614		203,879
Dispositions		0
Amortization of intangible assets		79,043	[1]	57,568	[2]	52,572	[3]
Adjustments to preliminary purchase price allocation		86,773
Foreign currency movements and other adjustments		774		(3,252)
Net intangible assets, ending balance		796,297		766,179		623,120
Other Operations [Member]
Intangible [Line Items]
Net intangible assets, beginning balance	[8]	655,052		716,959
Acquisitions	[8]	0		0
Dispositions	[8]	(2,716)
Amortization of intangible assets	[8]	61,202		61,789
Adjustments to preliminary purchase price allocation	[8]	0
Foreign currency movements and other adjustments	[8]	(2,289)		(118)
Net intangible assets, ending balance	[8]	$ 588,845		$ 655,052		$ 716,959

[1] Segment profit for the Markel Ventures segment includes amortization of intangible assets attributable to Markel Ventures. Amortization of intangible assets attributable to the Company's underwriting segments, included in Other, was $38.5 million for the year ended December 31, 2022.

[2] Segment profit for the Markel Ventures segment includes amortization of intangible assets attributable to Markel Ventures. Amortization of intangible assets attributable to the Company's underwriting segments, included in Other, was $41.2 million for the year ended December 31, 2021.

[3] Segment profit for the Markel Ventures segment includes amortization of intangible assets attributable to Markel Ventures. Amortization of intangible assets attributable to the Company's underwriting segments, included in Other, was $41.9 million for the year ended December 31, 2020.

[4] Amounts included in Underwriting reflect the intangible assets associated with the Company's underwriting segments, which are not allocated between the Insurance and Reinsurance segments.

[5] Other represents the total profit (loss) attributable to the Company's operations that are not included in a reportable segment, as well as amortization of intangible assets attributable to the underwriting segments, which is not allocated between the Insurance and Reinsurance segments.

[6] Other represents the total profit (loss) attributable to the Company's operations that are not included in a reportable segment, as well as amortization of intangible assets attributable to the underwriting segments, which is not allocated between the Insurance and Reinsurance segments.

[7] Other represents the total profit (loss) attributable to the Company's operations that are not included in a reportable segment, as well as amortization of intangible assets attributable to the underwriting segments, which is not allocated between the Insurance and Reinsurance segments.

[8] Amounts included in Other reflect the Company's operations that are not included in a reportable segment and are primarily related to the Company's program services and insurance-linked securities operations.

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Goodwill And Intangible Assets (Components Of Intangible Assets) (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Schedule of Indefinite-Lived And Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross carrying amount	$ 2,836,774	$ 2,739,602
Intangible assets, accumulated amortization	(1,089,310)	(917,116)
Customer Relationships [Member]
Schedule of Indefinite-Lived And Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross carrying amount	1,425,330	1,379,739
Intangible assets, accumulated amortization	(498,987)	(405,057)
Investment Management Agreements [Member]
Schedule of Indefinite-Lived And Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross carrying amount	464,000	468,000
Intangible assets, accumulated amortization	(120,394)	(92,478)
Broker Relationships [Member]
Schedule of Indefinite-Lived And Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross carrying amount	204,972	206,855
Intangible assets, accumulated amortization	(117,386)	(109,210)
Trade Names [Member]
Schedule of Indefinite-Lived And Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross carrying amount	293,194	238,331
Intangible assets, accumulated amortization	(118,976)	(100,023)
Technology [Member]
Schedule of Indefinite-Lived And Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross carrying amount	113,170	113,200
Intangible assets, accumulated amortization	(92,646)	(82,845)
Agent Relationships [Member]
Schedule of Indefinite-Lived And Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross carrying amount	92,000	92,000
Intangible assets, accumulated amortization	(34,756)	(28,622)
Insurance Licenses [Member]
Schedule of Indefinite-Lived And Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross carrying amount	74,333	74,333
Intangible assets, accumulated amortization	0	0
Renewal Rights [Domain]
Schedule of Indefinite-Lived And Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross carrying amount	21,449	21,449
Intangible assets, accumulated amortization	(21,449)	(21,449)
Other [Member]
Schedule of Indefinite-Lived And Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross carrying amount	148,326	145,695
Intangible assets, accumulated amortization	$ (84,716)	$ (77,432)

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Leases (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Leases [Abstract]
Maximum remaining term of noncancelable leases	20 years
Operating Lease, Expense	$ 126.3	$ 115.4	$ 94.4

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Leases (Summary of Supplementary Balance Sheet Information) (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Lessee, Lease, Description [Line Items]
Operating lease, right-of-use asset	$ 526,704	$ 533,702
Operating lease, liability	$ 554,394	$ 571,337
Operating lease, weighted average remaining lease term	11 years 8 months 12 days	10 years 9 months 18 days
Operating lease, weighted average discount rate, percent	3.10%	3.00%
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Other assets	Other assets
Operating Lease, Liability, Statement of Financial Position [Extensible Enumeration]	Other liabilities	Other liabilities

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Leases (Maturities of Operating Lease Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Leases [Abstract]
Lessee, operating lease, liability, payments, due next twelve months	$ 100,887
Lessee, operating lease, liability, payments, due year two	85,030
Lessee, operating lease, liability, payments, due year three	71,474
Lessee, operating lease, liability, payments, due year four	60,729
Lessee, operating lease, liability, payments, due year five	51,702
Lessee, operating lease, liability, payments, due after year five	291,290
Lessee, operating lease, liability, payments, due	661,112
Lessee, operating lease, liability, undiscounted excess amount	(106,718)
Operating lease, liability	554,394	$ 571,337
Lessee, Lease, Description [Line Items]
Operating lease, liability	$ 554,394	$ 571,337
Operating Lease, Liability, Statement of Financial Position [Extensible Enumeration]	Other liabilities	Other liabilities

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Products, Services and Other Revenues (Schedule Of Revenues From Contracts With Customers By Type) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Disaggregation of Revenue [Line Items]
Other Revenues	$ 5,236,521	$ 3,997,445	$ 3,129,056
Program services and other fronting [Member]
Disaggregation of Revenue [Line Items]
Other Revenues	147,612	123,823	102,989
Disposition gains
Disaggregation of Revenue [Line Items]
Other Revenues	225,828	0	0
Other [Member]
Disaggregation of Revenue [Line Items]
Other Revenues	95,185	120,361	99,958
Markel Ventures [Member]
Disaggregation of Revenue [Line Items]
Other Revenues	4,756,618	3,643,816	2,794,714
Markel Ventures [Member] | Program services and other fronting [Member]
Disaggregation of Revenue [Line Items]
Other Revenues	0	0	0
Markel Ventures [Member] | Disposition gains
Disaggregation of Revenue [Line Items]
Other Revenues	0	0	0
Markel Ventures [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Other Revenues	111,806	111,662	102,274
Other [Member]
Disaggregation of Revenue [Line Items]
Other Revenues	479,903	353,629	334,342
Other [Member] | Program services and other fronting [Member]
Disaggregation of Revenue [Line Items]
Other Revenues	147,612	123,823	102,989
Other [Member] | Disposition gains
Disaggregation of Revenue [Line Items]
Other Revenues	225,828	0	0
Other [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Other Revenues	(16,621)	8,699	(2,316)
Revenue from Contract with Customer [Member]
Disaggregation of Revenue [Line Items]
Other Revenues	4,767,896	3,753,261	2,926,109
Revenue from Contract with Customer [Member] | Products [Member]
Disaggregation of Revenue [Line Items]
Other Revenues	2,379,399	1,668,448	1,396,706
Revenue from Contract with Customer [Member] | Services [Member]
Disaggregation of Revenue [Line Items]
Other Revenues	2,309,288	1,998,556	1,412,210
Revenue from Contract with Customer [Member] | Investment management [Member]
Disaggregation of Revenue [Line Items]
Other Revenues	79,209	86,257	117,193
Revenue from Contract with Customer [Member] | Markel Ventures [Member]
Disaggregation of Revenue [Line Items]
Other Revenues	4,644,812	3,532,154	2,692,440
Revenue from Contract with Customer [Member] | Markel Ventures [Member] | Products [Member]
Disaggregation of Revenue [Line Items]
Other Revenues	2,379,399	1,668,448	1,396,706
Revenue from Contract with Customer [Member] | Markel Ventures [Member] | Services [Member]
Disaggregation of Revenue [Line Items]
Other Revenues	2,265,413	1,863,706	1,295,734
Revenue from Contract with Customer [Member] | Markel Ventures [Member] | Investment management [Member]
Disaggregation of Revenue [Line Items]
Other Revenues	0	0	0
Revenue from Contract with Customer [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Other Revenues	123,084	221,107	233,669
Revenue from Contract with Customer [Member] | Other [Member] | Products [Member]
Disaggregation of Revenue [Line Items]
Other Revenues	0	0	0
Revenue from Contract with Customer [Member] | Other [Member] | Services [Member]
Disaggregation of Revenue [Line Items]
Other Revenues	43,875	134,850	116,476
Revenue from Contract with Customer [Member] | Other [Member] | Investment management [Member]
Disaggregation of Revenue [Line Items]
Other Revenues	$ 79,209	$ 86,257	$ 117,193

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Products, Services and Other Revenues Products, Services and Other Revenues (Receivables Related To Contracts With Customers) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Contracts with customers [Member]
Receivables [Line Items]
Trade and Other Receivables	$ 624.1	$ 626.1

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Unpaid Losses And Loss Adjustment Expenses (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]
Net losses and loss adjustment expenses	$ 4,613,035	$ 4,061,000	$ 4,073,325
IBNR reserves as a percentage of total unpaid losses and loss adjustment expenses	70.00%	67.00%
Prior Year Claims and Claims Adjustment Expense	$ 167,400	$ 479,800	606,400
Insurance [Member]
Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]
Net losses and loss adjustment expenses	3,936,425	3,311,185	3,373,085
Prior Year Claims and Claims Adjustment Expense	142,900	506,300	554,600
Insurance [Member] | 2012 and Prior Accident Years [Member]
Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]
Prior Year Claims and Claims Adjustment Expense	50,800
Reinsurance [Member]
Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]
Net losses and loss adjustment expenses	676,610	749,815	700,240
Prior Year Claims and Claims Adjustment Expense	26,100	(19,900)	51,800
Reinsurance [Member] | 2012 and Prior Accident Years [Member]
Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]
Prior Year Claims and Claims Adjustment Expense	36,900
Program services and other fronting [Member]
Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]
Reinsurance recoverables	3,000,000	2,500,000
Asbestos [Member]
Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]
Asbestos-related reserves, gross loss incurred	153,200	218,600
Asbestos-related reserves, net loss incurred	54,500	66,200
Hurricane Ian | Insurance [Member]
Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]
Net losses and loss adjustment expenses	46,200
Reinsurance recoverables	115,300
Hurricane Ian | Program services and other fronting [Member]
Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]
Net losses and loss adjustment expenses	850,000
Hurricane Ian | Program services and other fronting [Member] | Nephila Reinsurers [Member]
Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]
Reinsurance recoverables	850,000
2021 Catastrophes [Member]
Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]
Net losses and loss adjustment expenses		195,000
Reinsurance recoverables		221,700
2020 Catastrophes [Member]
Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]
Net losses and loss adjustment expenses			172,200
Reinsurance recoverables			125,700
Russia-Ukraine conflict
Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]
Net losses and loss adjustment expenses	35,700
Reinsurance recoverables	44,300
COVID-19 Pandemic [Member]
Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]
Net losses and loss adjustment expenses	$ (5,400)	$ 15,700	358,300
Reinsurance recoverables			$ 106,200

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Unpaid Losses And Loss Adjustment Expenses (Reconciliation Of Consolidated Reserves For Losses And Loss Adjustment Expenses) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Liability for Unpaid Claims and Claims Adjustment Expense, Incurred Claims [Abstract]
Gross reserves for losses and loss adjustment expenses, beginning of year	$ 18,178,894	$ 16,222,376	$ 14,728,676
Reinsurance recoverables on unpaid losses, beginning of year	6,876,317	5,736,659	5,253,415
Net reserves for losses and loss adjustment expenses, beginning of year	11,302,577	10,485,717	9,475,261
Effect of foreign currency rate changes on beginning of year balance	(160,622)	(54,736)	68,368
Effect of adoption of ASC 326, Financial Instruments-Credit Losses	0	0	3,849
Adjusted net reserves for losses and loss adjustment expenses, beginning of year	11,141,955	10,430,981	9,547,478
Incurred losses and loss adjustment expenses, current accident year	4,613,035	4,061,000	4,073,325
Incurred losses and loss adjustment expenses, prior accident years (including deposit liability)	(167,446)	(478,930)	(606,414)
Total incurred losses and loss adjustment expenses	4,445,589	3,582,070	3,466,911
Payments, current accident year	580,537	637,169	749,887
Payments, prior accident years	2,396,446	2,066,290	1,779,980
Total payments	2,976,983	2,703,459	2,529,867
Effect of foreign currency rate changes on current year activity	(5,468)	(4,253)	1,195
Liability for unpaid claims and claims adjustment expenses, acquisition	347,921	0	0
Liability for unpaid claims and claims adjustment expenses, business disposal	0	(2,762)	0
Net reserves for losses and loss adjustment expenses, end of year	12,953,014	11,302,577	10,485,717
Reinsurance recoverables on unpaid losses, end of year	7,994,884	6,876,317	5,736,659
Gross reserves for losses and loss adjustment expenses, end of year	$ 20,947,898	$ 18,178,894	$ 16,222,376

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Unpaid Losses And Loss Adjustment Expenses (Prior Year Losses and Loss Adjustment Expenses Development by Product Line) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]
Incurred losses and loss adjustment expenses, prior accident years	$ (167.4)	$ (479.8)	$ (606.4)
Insurance [Member]
Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]
Incurred losses and loss adjustment expenses, prior accident years	(142.9)	(506.3)	(554.6)
Insurance [Member] | Professional liability [Member]
Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]
Incurred losses and loss adjustment expenses, prior accident years		(54.7)	(128.9)
Insurance [Member] | Professional liability [Member] | Short-Duration Insurance Contracts, Accident Years 2018 and 2019
Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]
Incurred losses and loss adjustment expenses, prior accident years	121.0
Insurance [Member] | Professional liability [Member] | Short-Duration Insurance Contracts, Accident Years, all other
Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]
Incurred losses and loss adjustment expenses, prior accident years	(91.1)
Insurance [Member] | General liability [Member]
Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]
Incurred losses and loss adjustment expenses, prior accident years		(139.7)	(131.8)
Insurance [Member] | General liability [Member] | Short-Duration Insurance Contracts, Accident Years, all other
Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]
Incurred losses and loss adjustment expenses, prior accident years	(20.5)
Insurance [Member] | General liability [Member] | Short-Duration Insurance Contracts, Accident Years 2016 to 2019
Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]
Incurred losses and loss adjustment expenses, prior accident years	61.6
Insurance [Member] | Workers' compensation [Member]
Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]
Incurred losses and loss adjustment expenses, prior accident years	(62.1)	(79.0)	(92.3)
Insurance [Member] | Programs [Member]
Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]
Incurred losses and loss adjustment expenses, prior accident years	(48.3)
Insurance [Member] | Property [Member]
Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]
Incurred losses and loss adjustment expenses, prior accident years	(48.1)	(96.5)
Insurance [Member] | Credit and surety [Member]
Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]
Incurred losses and loss adjustment expenses, prior accident years	(31.7)
Insurance [Member] | Other products [Member]
Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]
Incurred losses and loss adjustment expenses, prior accident years	(23.7)	(76.4)	(155.6)
Insurance [Member] | Marine and energy [Member]
Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]
Incurred losses and loss adjustment expenses, prior accident years		(60.0)	(46.0)
Reinsurance [Member]
Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]
Incurred losses and loss adjustment expenses, prior accident years	(26.1)	19.9	(51.8)
Reinsurance [Member] | Professional liability [Member]
Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]
Incurred losses and loss adjustment expenses, prior accident years		29.2	21.0
Reinsurance [Member] | General liability [Member]
Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]
Incurred losses and loss adjustment expenses, prior accident years		(19.2)
Reinsurance [Member] | Property [Member]
Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]
Incurred losses and loss adjustment expenses, prior accident years	(29.2)	35.0	(68.4)
Reinsurance [Member] | Credit and surety [Member]
Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]
Incurred losses and loss adjustment expenses, prior accident years	(22.9)	(16.6)
Reinsurance [Member] | Other products [Member]
Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]
Incurred losses and loss adjustment expenses, prior accident years	(27.1)	(8.5)	(38.8)
Reinsurance [Member] | Premium adjustments
Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]
Incurred losses and loss adjustment expenses, prior accident years	53.1
Reinsurance [Member] | Public entity
Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]
Incurred losses and loss adjustment expenses, prior accident years			$ 34.4
Other [Member]
Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]
Incurred losses and loss adjustment expenses, prior accident years	$ 1.6	$ 6.6

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Unpaid Losses And Loss Adjustment Expenses (Ultimate Incurred Losses And Cumulative Paid Losses And Allocated Loss Adjustment Expenses, Net Of Reinsurance) (Details)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)
Claims Development [Line Items]
Total liabilities for unpaid losses and loss adjustment expenses, net of reinsurance	$ 12,693,361,000
Insurance [Member]
Claims Development [Line Items]
Ultimate incurred losses and allocated loss adjustment expenses, net of reinsurance	22,240,400,000
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance	13,569,500,000
All outstanding liabilities for unpaid losses and loss adjustment expenses before 2013, net of reinsurance	237,400,000
Total liabilities for unpaid losses and loss adjustment expenses, net of reinsurance	8,908,308,000
Insurance [Member] | 2013 Accident Year [Member]
Claims Development [Line Items]
Ultimate incurred losses and allocated loss adjustment expenses, net of reinsurance	1,283,700,000	$ 1,292,800,000	$ 1,296,600,000	$ 1,315,600,000	$ 1,360,800,000	$ 1,406,200,000	$ 1,452,600,000	$ 1,514,700,000	$ 1,683,400,000	$ 1,724,900,000
Total of incurred-but-not-reported liabilities, net of reinsurance	$ 43,300,000
Cumulative number of reported claims	91,000
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance	$ 1,178,200,000	1,163,900,000	1,150,200,000	1,116,400,000	1,092,900,000	1,031,600,000	943,800,000	774,900,000	568,900,000	270,200,000
Insurance [Member] | 2014 Accident Year [Member]
Claims Development [Line Items]
Ultimate incurred losses and allocated loss adjustment expenses, net of reinsurance	1,438,200,000	1,457,700,000	1,455,200,000	1,487,400,000	1,508,600,000	1,556,800,000	1,613,000,000	1,680,700,000	1,850,800,000
Total of incurred-but-not-reported liabilities, net of reinsurance	$ 52,800,000
Cumulative number of reported claims	86,000
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance	$ 1,339,900,000	1,308,800,000	1,288,800,000	1,240,400,000	1,157,300,000	1,052,900,000	886,600,000	652,600,000	329,600,000
Insurance [Member] | 2015 Accident Year [Member]
Claims Development [Line Items]
Ultimate incurred losses and allocated loss adjustment expenses, net of reinsurance	1,442,200,000	1,451,200,000	1,455,200,000	1,487,200,000	1,517,800,000	1,571,900,000	1,695,000,000	1,769,100,000
Total of incurred-but-not-reported liabilities, net of reinsurance	$ 65,900,000
Cumulative number of reported claims	89,000
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance	$ 1,293,000,000	1,260,600,000	1,230,900,000	1,142,100,000	1,034,000,000	870,900,000	660,700,000	321,000,000.0
Insurance [Member] | 2016 Accident Year [Member]
Claims Development [Line Items]
Ultimate incurred losses and allocated loss adjustment expenses, net of reinsurance	1,682,300,000	1,669,800,000	1,677,100,000	1,703,900,000	1,756,300,000	1,854,200,000	1,858,000,000
Total of incurred-but-not-reported liabilities, net of reinsurance	$ 86,900,000
Cumulative number of reported claims	101,000
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance	$ 1,427,500,000	1,351,900,000	1,288,300,000	1,160,000,000	975,400,000	747,400,000	370,300,000
Insurance [Member] | 2017 Accident Year [Member]
Claims Development [Line Items]
Ultimate incurred losses and allocated loss adjustment expenses, net of reinsurance	2,023,700,000	2,004,700,000	2,018,200,000	2,061,000,000	2,179,600,000	2,312,100,000
Total of incurred-but-not-reported liabilities, net of reinsurance	$ 103,500,000
Cumulative number of reported claims	139,000
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance	$ 1,741,000,000	1,620,100,000	1,511,100,000	1,275,600,000	983,900,000	436,000,000.0
Insurance [Member] | 2018 Accident Year [Member]
Claims Development [Line Items]
Ultimate incurred losses and allocated loss adjustment expenses, net of reinsurance	2,153,700,000	2,061,600,000	2,099,900,000	2,325,500,000	2,432,400,000
Total of incurred-but-not-reported liabilities, net of reinsurance	$ 194,900,000
Cumulative number of reported claims	193,000
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance	$ 1,674,800,000	1,498,300,000	1,346,900,000	1,019,300,000	492,200,000
Insurance [Member] | 2019 Accident Year [Member]
Claims Development [Line Items]
Ultimate incurred losses and allocated loss adjustment expenses, net of reinsurance	2,295,500,000	2,244,400,000	2,299,100,000	2,556,600,000
Total of incurred-but-not-reported liabilities, net of reinsurance	$ 335,600,000
Cumulative number of reported claims	228,000
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance	$ 1,574,100,000	1,261,400,000	1,082,400,000	523,900,000
Insurance [Member] | 2020 Accident Year [Member]
Claims Development [Line Items]
Ultimate incurred losses and allocated loss adjustment expenses, net of reinsurance	2,914,700,000	2,974,700,000	3,083,400,000
Total of incurred-but-not-reported liabilities, net of reinsurance	$ 1,042,600,000
Cumulative number of reported claims	179,000
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance	$ 1,518,100,000	1,150,900,000	807,800,000
Insurance [Member] | 2021 Accident Year [Member]
Claims Development [Line Items]
Ultimate incurred losses and allocated loss adjustment expenses, net of reinsurance	2,909,000,000	3,085,700,000
Total of incurred-but-not-reported liabilities, net of reinsurance	$ 1,483,000,000
Cumulative number of reported claims	137,000
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance	$ 988,500,000	474,300,000
Insurance [Member] | 2022 Accident Year [Member]
Claims Development [Line Items]
Ultimate incurred losses and allocated loss adjustment expenses, net of reinsurance	4,097,400,000
Total of incurred-but-not-reported liabilities, net of reinsurance	$ 2,791,300,000
Cumulative number of reported claims	121,000
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance	$ 834,400,000
Reinsurance [Member]
Claims Development [Line Items]
Ultimate incurred losses and allocated loss adjustment expenses, net of reinsurance	6,551,600,000
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance	3,602,000,000
All outstanding liabilities for unpaid losses and loss adjustment expenses before 2013, net of reinsurance	388,000,000.0
Total liabilities for unpaid losses and loss adjustment expenses, net of reinsurance	3,337,587,000
Reinsurance [Member] | 2013 Accident Year [Member]
Claims Development [Line Items]
Ultimate incurred losses and allocated loss adjustment expenses, net of reinsurance	476,900,000	475,300,000	480,000,000.0	478,200,000	496,100,000	533,200,000	525,400,000	538,300,000	571,800,000	579,400,000
Total of incurred-but-not-reported liabilities, net of reinsurance	32,700,000
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance	383,400,000	369,500,000	358,100,000	343,300,000	324,900,000	295,600,000	263,200,000	205,500,000	153,400,000	$ 70,600,000
Reinsurance [Member] | 2014 Accident Year [Member]
Claims Development [Line Items]
Ultimate incurred losses and allocated loss adjustment expenses, net of reinsurance	501,200,000	505,300,000	503,800,000	519,300,000	542,200,000	563,100,000	524,400,000	552,100,000	569,200,000
Total of incurred-but-not-reported liabilities, net of reinsurance	60,300,000
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance	379,400,000	369,300,000	352,900,000	335,700,000	302,900,000	267,000,000.0	220,500,000	155,600,000	$ 97,400,000
Reinsurance [Member] | 2015 Accident Year [Member]
Claims Development [Line Items]
Ultimate incurred losses and allocated loss adjustment expenses, net of reinsurance	486,600,000	486,300,000	498,600,000	503,900,000	515,000,000.0	523,700,000	508,800,000	523,100,000
Total of incurred-but-not-reported liabilities, net of reinsurance	84,400,000
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance	360,300,000	343,700,000	324,100,000	299,600,000	252,700,000	202,000,000.0	131,200,000	$ 63,600,000
Reinsurance [Member] | 2016 Accident Year [Member]
Claims Development [Line Items]
Ultimate incurred losses and allocated loss adjustment expenses, net of reinsurance	554,300,000	550,900,000	526,800,000	516,900,000	519,000,000.0	518,500,000	509,100,000
Total of incurred-but-not-reported liabilities, net of reinsurance	69,800,000
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance	419,500,000	379,400,000	346,000,000.0	294,300,000	237,900,000	167,900,000	$ 79,000,000.0
Reinsurance [Member] | 2017 Accident Year [Member]
Claims Development [Line Items]
Ultimate incurred losses and allocated loss adjustment expenses, net of reinsurance	920,400,000	908,200,000	936,000,000.0	934,700,000	928,700,000	895,700,000
Total of incurred-but-not-reported liabilities, net of reinsurance	105,600,000
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance	693,500,000	624,500,000	560,900,000	479,200,000	358,100,000	$ 157,400,000
Reinsurance [Member] | 2018 Accident Year [Member]
Claims Development [Line Items]
Ultimate incurred losses and allocated loss adjustment expenses, net of reinsurance	767,800,000	772,100,000	767,900,000	775,300,000	749,500,000
Total of incurred-but-not-reported liabilities, net of reinsurance	150,700,000
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance	484,500,000	414,400,000	344,700,000	243,700,000	$ 87,000,000.0
Reinsurance [Member] | 2019 Accident Year [Member]
Claims Development [Line Items]
Ultimate incurred losses and allocated loss adjustment expenses, net of reinsurance	702,700,000	689,200,000	675,600,000	662,000,000.0
Total of incurred-but-not-reported liabilities, net of reinsurance	223,400,000
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance	359,600,000	268,400,000	173,600,000	$ 53,500,000
Reinsurance [Member] | 2020 Accident Year [Member]
Claims Development [Line Items]
Ultimate incurred losses and allocated loss adjustment expenses, net of reinsurance	742,400,000	732,700,000	680,200,000
Total of incurred-but-not-reported liabilities, net of reinsurance	344,000,000.0
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance	309,800,000	203,700,000	$ 93,500,000
Reinsurance [Member] | 2021 Accident Year [Member]
Claims Development [Line Items]
Ultimate incurred losses and allocated loss adjustment expenses, net of reinsurance	736,700,000	735,500,000
Total of incurred-but-not-reported liabilities, net of reinsurance	446,900,000
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance	187,800,000	$ 79,500,000
Reinsurance [Member] | 2022 Accident Year [Member]
Claims Development [Line Items]
Ultimate incurred losses and allocated loss adjustment expenses, net of reinsurance	662,600,000
Total of incurred-but-not-reported liabilities, net of reinsurance	614,100,000
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance	$ 24,200,000

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Unpaid Losses And Loss Adjustment Expenses (Average Annual Percentage Payout Of Incurred Losses By Age (in Years), Net Of Reinsurance) (Details)	Dec. 31, 2022
Insurance [Member]
Short-duration Insurance Contracts, Historical Claims Duration [Line Items]
Average annual percentage payout of incurred losses in year 1	22.00%
Average annual percentage payout of incurred losses in year 2	21.90%
Average annual percentage payout of incurred losses in year 3	13.80%
Average annual percentage payout of incurred losses in year 4	11.30%
Average annual percentage payout of incurred losses in year 5	7.10%
Average annual percentage payout of incurred losses in year 6	5.30%
Average annual percentage payout of incurred losses in year 7	2.90%
Average annual percentage payout of incurred losses in year 8	2.10%
Average annual percentage payout of incurred losses in year 9	1.60%
Average annual percentage payout of incurred losses in year 10	1.10%
Reinsurance [Member]
Short-duration Insurance Contracts, Historical Claims Duration [Line Items]
Average annual percentage payout of incurred losses in year 1	12.50%
Average annual percentage payout of incurred losses in year 2	16.40%
Average annual percentage payout of incurred losses in year 3	13.10%
Average annual percentage payout of incurred losses in year 4	10.40%
Average annual percentage payout of incurred losses in year 5	8.20%
Average annual percentage payout of incurred losses in year 6	6.30%
Average annual percentage payout of incurred losses in year 7	4.60%
Average annual percentage payout of incurred losses in year 8	3.30%
Average annual percentage payout of incurred losses in year 9	2.20%
Average annual percentage payout of incurred losses in year 10	2.90%

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Unpaid Losses And Loss Adjustment Expenses (Reconciliation Of Net Incurred And Paid Loss Development Tables, By Segment, To The Liability For Losses And Loss Adjustment Expenses In The Consolidated Balance Sheet) (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]
Liabilities for unpaid losses and loss adjustment expenses, net of reinsurance	$ 12,693,361
Reinsurance recoverable on unpaid losses	7,994,884
Unallocated loss adjustment expenses	326,275
Unamortized discount, net of acquisition fair value adjustments, included in unpaid losses and loss adjustment expenses	(66,622)
Total reconciling items	259,653
Total gross liability for unpaid losses and loss adjustment expenses	20,947,898	$ 18,178,894	$ 16,222,376	$ 14,728,676
Market CATCo Re
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]
Liabilities for unpaid losses and loss adjustment expenses, net of reinsurance	347,921
Insurance [Member]
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]
Liabilities for unpaid losses and loss adjustment expenses, net of reinsurance	8,908,308
Reinsurance recoverable on unpaid losses	2,425,560
Total gross liability for unpaid losses and loss adjustment expenses	11,616,386	10,051,994
Reinsurance [Member]
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]
Liabilities for unpaid losses and loss adjustment expenses, net of reinsurance	3,337,587
Reinsurance recoverable on unpaid losses	277,854
Total gross liability for unpaid losses and loss adjustment expenses	3,581,699	3,639,210
Other underwriting [Member]
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]
Liabilities for unpaid losses and loss adjustment expenses, net of reinsurance	89,563
Reinsurance recoverable on unpaid losses	56,968
Total gross liability for unpaid losses and loss adjustment expenses	197,602	271,356
Program services and other fronting [Member]
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]
Liabilities for unpaid losses and loss adjustment expenses, net of reinsurance	9,982
Reinsurance recoverable on unpaid losses	5,234,502
Total gross liability for unpaid losses and loss adjustment expenses	$ 5,204,290	$ 4,216,334

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Reinsurance (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Reinsurance Disclosures [Line Items]
Percentage of ceded earned premiums to gross earned premiums	38.00%	38.00%	37.00%
Percentage of assumed earned premiums to net earned premiums	30.00%	27.00%	26.00%
Underwriting [Member]
Reinsurance Disclosures [Line Items]
Reinsurance recoverables	$ (834,648)	$ (893,230)	$ (722,619)
Underwriting [Member] | Ten Largest Reinsurers [Member]
Reinsurance Disclosures [Line Items]
Recoverable balances as a percentage of the total balance	62.00%	63.00%
Underwriting [Member] | RenaissanceRe
Reinsurance Disclosures [Line Items]
Recoverable balances as a percentage of the total balance	11.00%
Program services and other fronting [Member]
Reinsurance Disclosures [Line Items]
Reinsurance recoverables	$ 3,000,000	$ 2,500,000
Program Services [Member] | Ten Largest Reinsurers [Member]
Reinsurance Disclosures [Line Items]
Recoverable balances as a percentage of the total balance	67.00%	68.00%
Program Services [Member] | Lloyd's of London
Reinsurance Disclosures [Line Items]
Recoverable balances as a percentage of the total balance	13.00%
Other fronting | Nephila Reinsurers [Member]
Reinsurance Disclosures [Line Items]
Recoverable balances as a percentage of the total balance	100.00%

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Reinsurance (Effect Of Reinsurance And Retrocessional Reinsurance On Premiums Written And Earned) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Effects of Reinsurance [Line Items]
Direct premiums written	$ 10,729,950	$ 9,508,184	$ 7,753,781
Direct premiums earned	10,068,570	8,729,068	7,442,776
Assumed premiums written	2,471,732	1,930,498	1,512,884
Assumed premiums earned	2,246,805	1,744,346	1,469,086
Ceded premiums written	(4,998,292)	(4,318,951)	(3,334,427)
Ceded premiums earned	(4,727,583)	(3,970,385)	(3,299,657)
Net premiums written	8,203,390	7,119,731	5,932,238
Net premiums earned	7,587,792	6,503,029	5,612,205
Underwriting [Member]
Effects of Reinsurance [Line Items]
Direct premiums written	8,085,812	6,863,229	5,715,038
Direct premiums earned	7,379,766	6,275,078	5,357,888
Assumed premiums written	1,761,726	1,622,700	1,444,967
Assumed premiums earned	1,589,920	1,482,755	1,394,239
Ceded premiums written	(1,640,165)	(1,360,763)	(1,222,390)
Ceded premiums earned	(1,378,191)	(1,250,392)	(1,134,501)
Net premiums written	8,207,373	7,125,166	5,937,615
Net premiums earned	7,591,495	6,507,441	5,617,626
Program services and other fronting [Member]
Effects of Reinsurance [Line Items]
Direct premiums written	2,644,138	2,644,955	2,038,743
Direct premiums earned	2,688,804	2,453,990	2,084,888
Assumed premiums written	710,006	307,798	67,917
Assumed premiums earned	656,885	261,591	74,847
Ceded premiums written	(3,358,127)	(2,958,188)	(2,112,037)
Ceded premiums earned	(3,349,392)	(2,719,993)	(2,165,156)
Net premiums written	(3,983)	(5,435)	(5,377)
Net premiums earned	$ (3,703)	$ (4,412)	$ (5,421)

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Reinsurance Reinsurance (Effect of Reinsurance and Retrocessional Reinsurance on Incurred Losses and Loss Adjustment Expenses) (Details) - Underwriting Operations [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Effects of Reinsurance [Line Items]
Gross losses and loss adjustment expenses	$ 5,281,424	$ 4,477,752	$ 4,189,948
Ceded losses and loss adjustment expenses	(834,648)	(893,230)	(722,619)
Net losses and loss adjustment expenses	$ 4,446,776	$ 3,584,522	$ 3,467,329

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Life And Annuity Benefits (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Liability for Future Policy Benefit, before Reinsurance [Abstract]
Adjustment to life and annuity benefits	$ (56,600)	$ (63,000)	$ 68,200
Cumulative adjustment life and annuity benefits	$ 0	$ 56,600
Average reserve discount rate	2.30%
Life and annuity benefits reserve single contract concentration	33.70%
Annuities included in life and annuity benefits subject to discretionary withdrawal	$ 0

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Life And Annuity Benefits (Schedule Of Life And Annuity Benefits) (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Liability for Future Policy Benefit, before Reinsurance [Abstract]
Life	$ 102,321	$ 113,797
Annuities	628,441	753,971
Accident and health	28,263	35,212
Total life and annuity benefits	$ 759,025	$ 902,980

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Senior Long-Term Debt And Other Debt (Narrative) (Details) - USD ($) $ in Thousands		12 Months Ended
	May 04, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Senior long-term debt and other debt		$ 4,103,629	$ 4,361,266
Senior long-term debt and other debt, estimated fair value		3,500,000	5,000,000
Interest on senior long-term debt and other debt		$ 197,300	178,600	$ 178,200
Line of credit facility, initiation date		Apr. 10, 2019
Line of credit facility, expiration date		Apr. 10, 2024
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Line of credit facility, capacity available		$ 300,000
Line of credit facility, increase (decrease), net		$ 200,000
Line of credit facility, unused capacity, commitment fee percentage		0.20%
Borrowings outstanding under the facility		$ 0	0
Revolving Credit Facility [Member] | Markel Ventures [Member]
Debt Instrument [Line Items]
Line of credit facility, capacity available		620,000
Borrowings outstanding under the facility		238,100	94,300
Revolving Credit Facility [Member] | Secured Letters Of Credit [Member]
Debt Instrument [Line Items]
Line of credit facility, capacity available		200,000
Markel Ventures subsidiary | Revolving Credit Facility [Member] | Markel Ventures [Member]
Debt Instrument [Line Items]
Borrowings outstanding under the facility		97,900
Other Debt [Member]
Debt Instrument [Line Items]
Senior long-term debt and other debt		416,738	327,044
Other Debt [Member] | Markel Ventures [Member]
Debt Instrument [Line Items]
Senior long-term debt and other debt		$ 414,100	287,600
3.45% Unsecured Senior Notes due May 7 2052
Debt Instrument [Line Items]
Net proceeds from issuance of unsecured senior notes	$ 591,400
3.45% Unsecured Senior Notes due May 7 2052 | Unsecured Senior Notes [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate		3.45%
Debt instrument, face amount	$ 600,000
4.90% Unsecured Senior Notes Due July 1, 2022 [Member] | Unsecured Senior Notes [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate		4.90%
Debt instrument, face amount			$ 350,000
7.35% Unsecured Senior Notes Due August 15, 2034 [Member] | Unsecured Senior Notes [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate		7.35%

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Senior Long-Term Debt And Other Debt (Summary Of Senior Long-Term Debt And Other Debt) (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Senior long-term debt and other debt	$ 4,103,629	$ 4,361,266
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Borrowings outstanding under the facility	0	0
Unsecured Senior Notes [Member] | 4.90% Unsecured Senior Notes Due July 1, 2022 [Member]
Debt Instrument [Line Items]
Unsecured senior notes	$ 0	349,815
Debt instrument, interest rate	4.90%
Debt Instrument, Unamortized Discount		159
Unsecured Senior Notes [Member] | 3.625% Unsecured Senior Notes Due March 30, 2023 [Member]
Debt Instrument [Line Items]
Unsecured senior notes	$ 249,940	249,702
Debt instrument, interest rate	3.625%
Debt Instrument, Unamortized Discount	$ 50	251
Unsecured Senior Notes [Member] | 3.50% Unsecured Senior Notes Due November 1, 2027 [Member]
Debt Instrument [Line Items]
Unsecured senior notes	$ 298,502	298,136
Debt instrument, interest rate	3.50%
Debt Instrument, Unamortized Discount	$ 1,161	1,445
Unsecured Senior Notes [Member] | 3.35% Unsecured Senior Notes Due September 17 2029 [Member]
Debt Instrument [Line Items]
Unsecured senior notes	$ 297,997	297,700
Debt instrument, interest rate	3.35%
Debt Instrument, Unamortized Discount	$ 1,668	1,916
Unsecured Senior Notes [Member] | 7.35% Unsecured Senior Notes Due August 15, 2034 [Member]
Debt Instrument [Line Items]
Unsecured senior notes	$ 129,004	128,932
Debt instrument, interest rate	7.35%
Debt Instrument, Unamortized Discount	$ 800	868
Unsecured Senior Notes [Member] | 5.0% Unsecured Senior Notes Due March 30, 2043 [Member]
Debt Instrument [Line Items]
Unsecured senior notes	$ 245,214	244,978
Debt instrument, interest rate	5.00%
Debt Instrument, Unamortized Discount	$ 4,535	4,759
Unsecured Senior Notes [Member] | 5.0% Unsecured Senior Notes Due April 5, 2046 [Member]
Debt Instrument [Line Items]
Unsecured senior notes	$ 493,585	493,310
Debt instrument, interest rate	5.00%
Debt Instrument, Unamortized Discount	$ 5,689	5,933
Unsecured Senior Notes [Member] | 4.30% Unsecured Senior Notes Due November 1, 2047 [Member]
Debt Instrument [Line Items]
Unsecured senior notes	$ 295,691	295,512
Debt instrument, interest rate	4.30%
Debt Instrument, Unamortized Discount	$ 3,669	3,821
Unsecured Senior Notes [Member] | 5.0% Unsecured Senior Notes Due May 20, 2049 [Member] [Domain]
Debt Instrument [Line Items]
Unsecured senior notes	$ 591,927	591,621
Debt instrument, interest rate	5.00%
Debt Instrument, Unamortized Discount	$ 6,900	7,161
Unsecured Senior Notes [Member] | 4.15% Unsecured Senior Notes Due September 17 2050 [Member]
Debt Instrument [Line Items]
Unsecured senior notes	$ 494,342	494,138
Debt instrument, interest rate	4.15%
Debt Instrument, Unamortized Discount	$ 4,917	5,095
Unsecured Senior Notes [Member] | 3.45% Unsecured Senior Notes due May 7 2052
Debt Instrument [Line Items]
Unsecured senior notes	$ 590,689	590,378
Debt instrument, interest rate	3.45%
Debt Instrument, Unamortized Discount	$ 8,182
Other Debt [Member]
Debt Instrument [Line Items]
Senior long-term debt and other debt	$ 416,738	$ 327,044
Other Debt [Member] | Other Debt [Member] | Minimum [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate	2.10%
Other Debt [Member] | Other Debt [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate	9.90%

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Senior Long-Term Debt And Other Debt (Summary Of Future Principal Payments Due At Maturity On Senior Long-Term Debt And Other Debt) (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Debt Disclosure [Abstract]
2023	$ 399,604
2024	27,180
2025	24,934
2026	25,637
2027	444,335
2028 and thereafter	3,226,317
Total principal payments	4,148,007
Net unamortized discount	(37,572)
Net unamortized debt issuance costs	(6,806)
Senior long-term debt and other debt	$ 4,103,629	$ 4,361,266

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Income Taxes (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Tax Disclosure [Line Items]
Income tax payments	$ 251,500,000	$ 204,900,000	$ 241,700,000
Income taxes payable	2,200,000	31,300,000
Income taxes receivable	9,900,000	18,900,000
Unrecognized tax benefits	0
Net deferred tax liability	836,815,000	1,413,362,000
Tax credit carryforwards	18,264,000	21,734,000
Gross deferred tax assets	667,677,000	727,682,000
Valuation allowance	(16,943,000)	(23,352,000)
Estimated gross deferred tax assets including net operating losses realized through generating taxable income or reversal of existing temporary differences attributable to gross deferred tax liabilities	$ 650,700,000
Income Tax Examination, Year under Examination	2017
Earliest Tax Year [Member]
Income Tax Disclosure [Line Items]
Tax credit, expiration date	Dec. 31, 2031
Certain Branch Operations In Europe and Canada [Member]
Income Tax Disclosure [Line Items]
Net operating loss carryforwards	$ 82,000,000
Other Liabilities [Member]
Income Tax Disclosure [Line Items]
Net deferred tax liability	874,000,000	1,400,000,000
Other Assets [Member]
Income Tax Disclosure [Line Items]
Net deferred tax assets	$ 37,200,000	$ 18,400,000

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Income Taxes (Components Of Income Before Income Taxes) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Tax Disclosure [Abstract]
U.S. operations	$ (109,311)	$ 2,263,748	$ 1,003,714
Foreign operations	(39,528)	868,445	(3,265)
Income (Loss) Before Income Taxes	$ (148,839)	$ 3,132,193	$ 1,000,449

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Income Taxes (Components Of Income Tax Expense) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Tax Disclosure [Abstract]
U.S., current	$ 222,074	$ 200,742	$ 182,046
Foreign, current	12,042	29,811	(10,631)
Total current tax expense	234,116	230,553	171,415
U.S., deferred	(300,850)	438,240	(557)
Foreign, deferred	19,098	15,665	(2,176)
Total deferred tax expense (benefit)	(281,752)	453,905	(2,733)
Income tax expense (benefit)	$ (47,636)	$ 684,458	$ 168,682

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Income Taxes (Reconciliations Of United States Corporate Income Tax Rate To Effective Tax Rate On Income Before Income Taxes) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Tax Disclosure [Abstract]
U.S. corporate tax rate	21.00%	21.00%	21.00%
Tax-exempt investment income, percent	10.80%	(0.50%)	(1.60%)
Foreign operations, percent	(3.60%)	0.50%	0.60%
Impairment of goodwill, percent	(11.30%)	0.00%	0.00%
Markel CATCo Re income not subject to tax, percent	12.70%	0.00%	0.00%
Nondeductible (deductible) losses on certain foreign investments, percent	0.10%	0.00%	(3.90%)
Other, percent	2.30%	0.90%	0.70%
Effective tax rate	32.00%	21.90%	16.80%
Income taxes at U.S. corporate tax rate	$ (31,256)	$ 657,760	$ 210,093
Tax-exempt investment income	(16,063)	(16,109)	(16,415)
Foreign operations	5,335	14,443	6,500
Impairment of goodwill	16,800	0	0
Markel CATCo Re income not subject to tax	(18,871)	0	0
Nondeductible (deductible) losses on certain foreign investments	(160)	1,240	(38,666)
Other	(3,421)	27,124	7,170
Income tax expense (benefit)	$ (47,636)	$ 684,458	$ 168,682

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Income Taxes (Components Of Domestic And Foreign Deferred Tax Assets And Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Unpaid losses and loss adjustment expenses	$ 170,518	$ 186,759
Unearned premiums recognized for income tax purposes	161,243	139,350
Lease liabilities	132,735	135,795
Life and annuity benefits	54,893	78,777
Accrued incentive compensation	39,469	50,806
Net operating loss carryforwards	25,305	47,510
Tax credit carryforwards	18,264	21,734
Other differences between financial reporting and tax bases	65,250	66,951
Total gross deferred tax assets	667,677	727,682
Less valuation allowance	(16,943)	(23,352)
Total gross deferred tax assets, net of allowance	650,734	704,330
Investments	761,421	1,401,871
Goodwill and other intangible assets	180,186	185,195
Deferred policy acquisition costs	161,220	146,601
Property, plant and equipment	144,259	126,846
Right-of-use lease assets	127,398	127,313
Other differences between financial reporting and tax bases	113,065	129,866
Total gross deferred tax liabilities	1,487,549	2,117,692
Net deferred tax liability	$ 836,815	$ 1,413,362

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Employee Benefit Plans (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Postemployment Benefits [Abstract]
Expenses relating to defined contribution plans	$ 57.9	$ 52.7	$ 48.6
Projected benefit plan obligations of Terra Nova Pension Plan	108.5	210.2
Fair value of Terra Nova Pension Plan assets	$ 171.7	$ 243.6

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Variable Interest Entities (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Variable Interest Entity [Line Items]
Cash funding used to purchase Markel CATCo Funds' interests in Markel CATCo Re	$ 45.1
Returned capital from Markel CATCo Re	24.9
Investment in Markel CATCo Re	$ 20.1
Percentage of Markel CATCo Re net equity by the Company	23.00%
Prior Year Claims and Claims Adjustment Expense	$ 167.4	$ 479.8	$ 606.4
Tail risk cover in proposed CATCo transaction	142.7
Market CATCo Re
Variable Interest Entity [Line Items]
Prior Year Claims and Claims Adjustment Expense	$ (89.9)

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Variable Interest Entities (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Variable Interest Entity [Line Items]
Cash and cash equivalents	$ 4,137,432	$ 3,978,490
Restricted cash and cash equivalents	1,084,081	902,457
Assets	49,791,259	48,477,096
Unpaid losses and loss adjustment expenses	20,947,898	18,178,894	$ 16,222,376	$ 14,728,676
Other liabilities	3,438,738	3,832,084
Total Liabilities	36,139,780	33,275,508
Shareholders' equity	13,065,534	14,717,350
Noncontrolling interests	62,791	22,860
Total Equity	13,128,325	14,740,210
Total Liabilities and Equity	49,791,259	$ 48,477,096
Market CATCo Re
Variable Interest Entity [Line Items]
Cash and cash equivalents	104,443
Restricted cash and cash equivalents	317,577
Other assets and receivables due from cedents	41,357
Assets	463,377
Unpaid losses and loss adjustment expenses	347,921
Other liabilities	26,717
Total Liabilities	374,638
Shareholders' equity	21,139
Noncontrolling interests	67,600
Total Equity	88,739
Total Liabilities and Equity	$ 463,377

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Related Party Transactions Related Party Transactions (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Related Party Transaction [Line Items]
Services and other revenues	$ 2,809,425	$ 2,285,325	$ 1,689,541
Gross written premiums	13,201,682	11,438,682	9,266,665
Ceded written premium	4,998,292	4,318,951	3,334,427
Reinsurance recoverables	8,446,745	7,293,555
Nephila Reinsurers [Member]
Related Party Transaction [Line Items]
Reinsurance recoverables	1,400,000	807,000
Hagerty Group, LLC [Member]
Related Party Transaction [Line Items]
Gross written premiums	689,700	596,900	506,700
Ceded written premium	456,600	338,900	239,300
Reinsurance recoverables	159,700	95,600
Insurance-linked Securities Operations [Member] | Unconsolidated entities managed by Nephila [Member]
Related Party Transaction [Line Items]
Services and other revenues	79,500	141,900	152,000
Program services and other fronting [Member] | Nephila Reinsurers [Member]
Related Party Transaction [Line Items]
Gross written premiums	1,000,000	689,200	412,400
Ceded written premium	1,008,900	689,200	412,400
Underwriting Operations [Member] | Nephila Reinsurers [Member]
Related Party Transaction [Line Items]
Ceded written premium	$ 65,600	$ 55,000	$ 47,600

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Shareholders' Equity (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions		12 Months Ended
	May 27, 2020	Dec. 31, 2022	Dec. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Issuer's Redemption Option, Period to Redeem After a Redemption Event	90 days
Preferred Stock, Redemption Price Per Share	$ 1,000
Earnings Per Share [Line Items]
Preferred stock, shares authorized		10,000,000
Preferred stock dividends		$ 36.0	$ 36.0
Preferred stock dividends, cash		$ 36.0	$ 36.0
Preferred Stock, Dividends Per Share, Declared		$ 60.00	$ 60.00
Preferred Stock, Dividends, Per Share, Cash Paid		60.00	$ 60.00
Rating Agency Event [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Preferred Stock, Redemption Price Per Share	1,020
Regulatory Capital Event [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Preferred Stock, Redemption Price Per Share	$ 1,000
Series A Preferred Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Preferred Stock, Dividend Rate, Reset Percentage	5.662%
Preferred Stock, Reset Period	5 years
Preferred Stock, Liquidation Preference Per Share	$ 1,000
Earnings Per Share [Line Items]
Preferred Stock, No Par Value		$ 0
Preferred stock, shares issued		600,000	600,000
Preferred stock, shares outstanding		600,000	600,000
Preferred Stock, Dividend Rate, Percentage	6.00%

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Shareholders' Equity (Schedule of Common Stock Outstanding Roll Forward) (Details) - $ / shares	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Class of Stock [Line Items]
Common stock, shares authorized	50,000,000
Common stock, no par value	$ 0
Common Stock [Member]
Class of Stock [Line Items]
Issued and outstanding common shares, beginning of year	13,632,000	13,783,000
Stock Repurchased During Period, Shares	(233,000)	(169,000)
Issued and outstanding common shares, end of year	13,423,000	13,632,000
Shares, Outstanding	13,423,000	13,632,000
Common Stock [Member] | Common Stock [Member]
Class of Stock [Line Items]
Issuance of common stock, shares	24,000	18,000

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Shareholders' Equity (Schedule Of Net Income Per Common Share) (Details) - USD ($) $ / shares in Units, $ in Thousands		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Earnings Per Share [Line Items]
Net income (loss) to common shareholders		$ (250,123)	$ 2,389,003	$ 797,630
Adjustment of redeemable noncontrolling interests		(69,896)	46,874	(28,705)
Adjusted net income (loss) to common shareholders		$ (320,019)	$ 2,435,877	$ 768,925
Basic common shares outstanding		13,580,000	13,768,000	13,811,000
Diluted common shares outstanding		13,580,000	13,800,000	13,823,000
Basic net income (loss) per common share		$ (23.57)	$ 176.92	$ 55.67
Diluted net income per common share	[1],[2]	$ (23.57)	$ 176.51	$ 55.63
2016 Compensation Plan [Member]
Earnings Per Share [Line Items]
Number of shares available for future awards	[1]	116,431
Restricted Stock Units (RSUs) [Member]
Earnings Per Share [Line Items]
Dilutive potential common shares from restricted stock units and restricted stock	[1],[2]	0	32,000	12,000
Potential incremental common shares attributable to share-based payment arrangements	[2]	33,000

[1] (1)    The Company has issued grants and awards of restricted stock units to employees as performance, retention or hiring incentives, as well as awards of restricted stock to non-employee directors, under its equity incentive compensation plan. At December 31, 2022, there were 116,431 shares available for future awards under the Company's equity incentive compensation plan.

[2] (2)    The impact of 33 thousand shares from restricted stock units and restricted stock was excluded from the computation of diluted net loss per common share for the year ended December 31, 2022 because the effect would have been anti-dilutive.

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Other Comprehensive Income (Loss) (Change In Accumulated Other Comprehensive Income By Component, Net Of Noncontrolling Interests) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss), beginning balance	$ 237,617
Income tax (expense) benefit	47,636	$ (684,458)	$ (168,682)
Accumulated other comprehensive income (loss), ending balance	(857,077)	237,617
Unrealized Gains (Losses) On Available-For-Sale Investments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss), beginning balance	343,872	698,810	346,037
Total other comprehensive income (loss) before income taxes	(1,407,316)	(450,096)	442,089
Income tax (expense) benefit	297,168	95,158	(89,316)
Total other comprehensive income (loss)	(1,110,148)	(354,938)	352,773
Accumulated other comprehensive income (loss), ending balance	(766,276)	343,872	698,810
Foreign Currency [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss), beginning balance	(56,631)	(56,420)	(86,249)
Total other comprehensive income (loss) before income taxes	(9,677)	(2,091)	29,829
Income tax (expense) benefit	401	1,880	0
Total other comprehensive income (loss)	(9,276)	(211)	29,829
Accumulated other comprehensive income (loss), ending balance	(65,907)	(56,631)	(56,420)
Net Actuarial Pension Loss [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss), beginning balance	(49,624)	(58,014)	(51,016)
Total other comprehensive income (loss) before income taxes	31,222	10,663	(8,849)
Income tax (expense) benefit	(6,492)	(2,273)	1,851
Total other comprehensive income (loss)	24,730	8,390	(6,998)
Accumulated other comprehensive income (loss), ending balance	(24,894)	(49,624)	(58,014)
Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss), beginning balance	237,617	584,376	208,772
Total other comprehensive income (loss) before income taxes	(1,385,771)	(441,524)	463,069
Income tax (expense) benefit	291,077	94,765	(87,465)
Total other comprehensive income (loss)	(1,094,694)	(346,759)	375,604
Accumulated other comprehensive income (loss), ending balance	$ (857,077)	$ 237,617	$ 584,376

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Commitments And Contingencies (Narrative) (Details) $ in Millions	Dec. 31, 2022 USD ($)
Loss Contingencies [Line Items]
Cash funding used to purchase Markel CATCo Funds' interests in Markel CATCo Re	$ 45.1
Tail risk cover in proposed CATCo transaction	142.7
Additional payments made, net of insurance proceeds, to investors by Markel	$ 101.9

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Statutory Financial Information (Narrative) (Details) $ in Millions	Dec. 31, 2022 USD ($)
Statutory Accounting Practices [Line Items]
Amount of cash and investments held as funds at Lloyd's	$ 873.0
Funds at Lloyd's, holding company	335.4
United States [Member]
Statutory Accounting Practices [Line Items]
Amount available for dividend payment	655.6
Bermuda [Member]
Statutory Accounting Practices [Line Items]
Amount available for dividend payment	$ 473.8

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Statutory Financial Information (Actual Statutory Capital And Surplus) (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
United States [Member]
Statutory Accounting Practices [Line Items]
Statutory capital and surplus	$ 5,236,793	$ 4,493,310
United Kingdom [Member]
Statutory Accounting Practices [Line Items]
Statutory capital and surplus	749,495	736,575
Bermuda [Member]
Statutory Accounting Practices [Line Items]
Statutory capital and surplus	1,895,132	2,106,606
Germany [Member]
Statutory Accounting Practices [Line Items]
Statutory capital and surplus	$ 125,194	$ 95,693

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Statutory Financial Information (Statutory Net Income (Loss)) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
United States [Member]
Statutory Accounting Practices [Line Items]
Statutory net income (loss)	$ 689,341	$ 705,908	$ 616,135
United Kingdom [Member]
Statutory Accounting Practices [Line Items]
Statutory net income (loss)	35,719	56,546	(25,776)
Bermuda [Member]
Statutory Accounting Practices [Line Items]
Statutory net income (loss)	(144,239)	556,275	228,740
Germany [Member]
Statutory Accounting Practices [Line Items]
Statutory net income (loss)	$ (2,471)	$ 1,780	$ (4,628)

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Markel Corporation (Parent Company Only) Financial Information (Schedule Of Condensed Balance Sheets) (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Condensed Financial Statements, Captions [Line Items]
Fixed maturity securities, available-for-sale (amortized cost of $164,100 in 2022 and $210,111 in 2021)	$ 11,856,835	$ 12,587,305
Equity securities (cost of $1,107,796 in 2022 and $1,771,597 in 2021)	7,671,912	9,023,927
Short-term investments, available-for-sale (estimated fair value approximates cost)	2,669,262	1,799,988
Investments	22,198,009	23,411,220
Cash and cash equivalents	4,137,432	3,978,490
Restricted cash and cash equivalents	1,084,081	902,457
Receivables	2,961,056	2,413,938
Income taxes receivable	9,900	18,900
Other assets	3,586,037	3,163,094
Total Assets	49,791,259	48,477,096
Senior long-term debt	4,103,629	4,361,266
Net deferred tax liability	836,815	1,413,362
Other liabilities	3,438,738	3,832,084
Total Liabilities	36,139,780	33,275,508
Preferred stock	591,891	591,891
Common stock	3,493,893	3,441,079
Retained earnings	9,836,827	10,446,763
Accumulated other comprehensive income (loss)	(857,077)	237,617
Total Shareholders' Equity	13,065,534	14,717,350
Total Liabilities and Equity	49,791,259	48,477,096
Parent Company [Member]
Condensed Financial Statements, Captions [Line Items]
Fixed maturity securities, available-for-sale (amortized cost of $164,100 in 2022 and $210,111 in 2021)	154,039	228,705
Equity securities (cost of $1,107,796 in 2022 and $1,771,597 in 2021)	1,473,116	2,784,189
Short-term investments, available-for-sale (estimated fair value approximates cost)	1,436,387	1,474,997
Investments	3,063,542	4,487,891
Cash and cash equivalents	594,101	763,985
Restricted cash and cash equivalents	21,146	15,485
Receivables	13,070	18,770
Investments in consolidated subsidiaries	12,905,353	13,298,971
Notes receivable from subsidiaries	60,111	135,756
Income taxes receivable	0	48,344
Other assets	445,875	408,161
Total Assets	17,103,198	19,177,363
Senior long-term debt	3,686,892	4,034,223
Notes payable to subsidiaries	0	32,753
Income taxes payable	120,616	0
Net deferred tax liability	148,365	295,289
Other liabilities	81,791	97,748
Total Liabilities	4,037,664	4,460,013
Preferred stock	591,891	591,891
Common stock	3,493,893	3,441,079
Retained earnings	9,836,827	10,446,763
Accumulated other comprehensive income (loss)	(857,077)	237,617
Total Shareholders' Equity	13,065,534	14,717,350
Total Liabilities and Equity	$ 17,103,198	$ 19,177,363

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Markel Corporation (Parent Company Only) Financial Information (Schedule of Condensed Balance Sheets - Parenthetical) (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Condensed Financial Statements, Captions [Line Items]
Fixed maturities, amortized cost	$ 12,805,887	$ 12,061,467
Equity securities cost	3,100,040	2,867,899
Parent Company [Member]
Condensed Financial Statements, Captions [Line Items]
Fixed maturities, amortized cost	164,100	210,111
Equity securities cost	$ 1,107,796	$ 1,771,597

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Markel Corporation (Parent Company Only) Financial Information (Schedule Of Condensed Statements Of Income And Comprehensive Income) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Condensed Financial Statements, Captions [Line Items]
Net investment income	$ 446,755	$ 367,417	$ 375,826
Change in fair value of equity securities	(1,554,750)	1,940,626	603,199
Net investment gains (losses)	(1,595,733)	1,978,534	617,979
Gain on disposition of subsidiary	225,832	22,085	0
Total Operating Revenues	11,675,335	12,846,425	9,735,066
Services and other expenses	2,306,635	2,022,935	1,561,120
Interest expense	196,062	183,579	177,582
Net foreign exchange losses (gains)	(140,209)	(72,271)	95,853
Total operating expenses	11,768,321	9,602,924	8,461,182
Income tax (expense) benefit	47,636	(684,458)	(168,682)
Net Income (Loss) to Shareholders	(214,123)	2,425,003	816,030
Preferred stock dividends	(36,000)	(36,000)	(18,400)
Net Income (Loss) to Common Shareholders	(250,123)	2,389,003	797,630
Net holding gains (losses) arising during the period	(1,155,054)	(348,315)	356,159
Reclassification adjustments for net gains (losses) included in net income (loss)	44,906	(6,623)	(3,386)
Change in net unrealized gains (losses) on available-for-sale investments, net of taxes	(1,110,148)	(354,938)	352,773
Total Other Comprehensive Income (Loss)	(1,094,677)	(346,761)	375,622
Comprehensive Income (Loss) to Shareholders	(1,308,817)	2,078,244	1,191,634
Parent Company [Member]
Condensed Financial Statements, Captions [Line Items]
Net investment income	34,781	9,099	22,037
Dividends on common stock of consolidated subsidiaries	278,557	1,081,988	466,244
Net realized investment gains	7,620	23,652	27,774
Change in fair value of equity securities	(397,906)	514,727	82,389
Net investment gains (losses)	(390,286)	538,379	110,163
Gain on disposition of subsidiary	107,293	0	0
Other revenues (losses)	(29,487)	11,078	(4,011)
Total Operating Revenues	858	1,640,544	594,433
Services and other expenses	111,848	22,379	1,025
Interest expense	172,125	185,568	187,562
Net foreign exchange losses (gains)	(13,143)	(6,236)	6,823
Total operating expenses	270,830	201,711	195,410
Income (Loss) Before Equity in Undistributed Earnings (Losses) of Consolidated Subsidiaries and Income Taxes	(269,972)	1,438,833	399,023
Equity in undistributed earnings (losses) of consolidated subsidiaries	(69,971)	1,081,976	400,289
Income tax (expense) benefit	125,820	(95,806)	16,718
Net Income (Loss) to Shareholders	(214,123)	2,425,003	816,030
Preferred stock dividends	(36,000)	(36,000)	(18,400)
Net Income (Loss) to Common Shareholders	(250,123)	2,389,003	797,630
Net holding gains (losses) arising during the period	(24,465)	(5,885)	21,482
Consolidated subsidiaries' net holding gains (losses) arising during the period	(1,130,589)	(342,430)	334,677
Reclassification adjustments for net gains (losses) included in net income (loss)	1,965	(34)	(14,937)
Consolidated subsidiaries' reclassification adjustments for net gains (losses) included in net income (loss) to shareholders	42,941	(6,589)	11,551
Change in net unrealized gains (losses) on available-for-sale investments, net of taxes	(1,110,148)	(354,938)	352,773
Consolidated subsidiaries' change in foreign currency translation adjustments, net of taxes	(9,276)	(211)	29,829
Consolidated subsidiaries' change in net actuarial pension loss, net of taxes	24,730	8,390	(6,998)
Total Other Comprehensive Income (Loss)	(1,094,694)	(346,759)	375,604
Comprehensive Income (Loss) to Shareholders	$ (1,308,817)	$ 2,078,244	$ 1,191,634

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Markel Corporation (Parent Company Only) Financial Information (Schedule Of Condensed Statements Of Cash Flows) (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Condensed Financial Statements, Captions [Line Items]
Net income (loss) to shareholders		$ (214,123)	$ 2,425,003	$ 816,030
Net Cash Provided By Operating Activities		2,709,442	2,274,067	1,737,587
Proceeds from sales, maturities, calls and prepayments of fixed maturity securities		1,152,335	708,111	862,333
Proceeds from sales of equity securities		242,010	200,570	1,360,090
Cost of equity securities purchased		(442,991)	(255,436)	(192,437)
Net change in short-term investments		(846,019)	228,955	(829,457)
Other		(8,294)	32,711	(72,932)
Net Cash Used By Investing Activities		(1,670,204)	(2,937,802)	(511,748)
Repayment and retirement of senior long-term debt		(1,255,005)	(486,730)	(275,996)
Additions to senior long-term debt		1,034,052	1,198,505	223,183
Repurchases of common stock		(290,796)	(206,518)	(26,832)
Issuance of preferred stock, net		0	0	591,891
Dividends paid on preferred stock		(36,000)	(36,000)	(18,400)
Other		(47,562)	(99,490)	(59,290)
Net Cash Provided (Used) By Financing Activities		(595,311)	369,767	434,556
Increase (decrease) in cash, cash equivalents, restricted cash and restricted cash equivalents		340,566	(335,702)	1,716,296
Cash, cash equivalents, restricted cash and restricted cash equivalents at beginning of year		4,880,947	5,216,649	3,500,353
CASH, CASH EQUIVALENTS, RESTRICTED CASH AND RESTRICTED CASH EQUIVALENTS AT END OF YEAR		5,221,513	4,880,947	5,216,649
Parent Company [Member]
Condensed Financial Statements, Captions [Line Items]
Net income (loss) to shareholders		(214,123)	2,425,003	816,030
Adjustments to reconcile net income (loss) to shareholders to net cash provided by operating activities		487,259	(2,213,261)	(708,162)
Net Cash Provided By Operating Activities		273,136	211,742	107,868
Proceeds from sales, maturities, calls and prepayments of fixed maturity securities		13,047	37,607	319,502
Proceeds from sales of equity securities		65,379	105,700	276,637
Cost of equity securities purchased		(16,660)	(73,644)	(90,459)
Net change in short-term investments		58,970	(224,646)	(522,666)
Return of capital from subsidiaries		0	17,193	15,164
Decrease (increase) in notes receivable due from subsidiaries		75,645	(50,000)	(25,000)
Capital contributions to subsidiaries	[1]	(94,585)	(271,729)	(605,426)
Proceeds from sale of subsidiary		165,615	0	0
Cost of equity method investments		0	(38,550)	(4,917)
Other		4,779	(5,368)	17,984
Net Cash Used By Investing Activities		272,190	(503,437)	(619,181)
Repayment and retirement of senior long-term debt		(350,000)	0	0
Additions to senior long-term debt		0	591,354	0
Decrease in notes payable to subsidiaries		(32,753)	0	(50,000)
Repurchases of common stock		(290,796)	(206,518)	(26,832)
Issuance of preferred stock, net		0	0	591,891
Dividends paid on preferred stock		(36,000)	(36,000)	(18,400)
Other		0	(1,181)	15
Net Cash Provided (Used) By Financing Activities		(709,549)	347,655	496,674
Increase (decrease) in cash, cash equivalents, restricted cash and restricted cash equivalents		(164,223)	55,960	(14,639)
Cash, cash equivalents, restricted cash and restricted cash equivalents at beginning of year		779,470	723,510	738,149
CASH, CASH EQUIVALENTS, RESTRICTED CASH AND RESTRICTED CASH EQUIVALENTS AT END OF YEAR		615,247	779,470	723,510
Noncash Capital Distribution to Subsidiaries, Parent Company	[1]	$ 924,000	$ 0	$ 49,500

[1] The holding company made non-cash capital contributions in the form of investments to its subsidiaries totaling $924.0 million and $49.5 million for the years ended December 31, 2022 and 2020, respectively. There were no non-cash capital contributions made to subsidiaries for the year ended December 31, 2021.

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Accounting Changes and Error Corrections (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Jan. 01, 2020
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Deferred policy acquisition costs	$ 925,483	$ 794,145
Deferred tax liabilities, gross	1,487,549	2,117,692
Retained earnings	$ 9,836,827	$ 10,446,763
Revision of Prior Period, Adjustment [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Deferred policy acquisition costs			$ 28,200
Deferred tax liabilities, gross			5,900
Retained earnings			$ 22,300

XML

Label	Element	Value
Common Stock [Member]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Adjusted Balance	mkl_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAdjustedBalance	$ 3,404,919,000
AOCI Attributable to Parent [Member]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Adjusted Balance	mkl_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAdjustedBalance	208,772,000
Cumulative Effect of Adoption of ASU No 2016-13, Net of Taxes	mkl_CumulativeEffectofAdoptionofASUNo201613NetofTaxes	0
Cumulative effect of change in accounting policy	mkl_CumulativeEffectOfChangeInAccountingPolicy	0
Total Equity [Member]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Adjusted Balance	mkl_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAdjustedBalance	11,096,891,000
Cumulative Effect of Adoption of ASU No 2016-13, Net of Taxes	mkl_CumulativeEffectofAdoptionofASUNo201613NetofTaxes	(3,827,000)
Cumulative effect of change in accounting policy	mkl_CumulativeEffectOfChangeInAccountingPolicy	22,302,000
Noncontrolling Interest [Member]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Adjusted Balance	mkl_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAdjustedBalance	7,549,000
Cumulative Effect of Adoption of ASU No 2016-13, Net of Taxes	mkl_CumulativeEffectofAdoptionofASUNo201613NetofTaxes	0
Cumulative effect of change in accounting policy	mkl_CumulativeEffectOfChangeInAccountingPolicy	0
Parent [Member]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Adjusted Balance	mkl_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAdjustedBalance	11,089,342,000
Cumulative Effect of Adoption of ASU No 2016-13, Net of Taxes	mkl_CumulativeEffectofAdoptionofASUNo201613NetofTaxes	(3,827,000)
Cumulative effect of change in accounting policy	mkl_CumulativeEffectOfChangeInAccountingPolicy	22,302,000
Preferred Stock [Member]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Adjusted Balance	mkl_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAdjustedBalance	0
Redeemable Noncontrolling Interests, Temporary Equity [Member]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Adjusted Balance	mkl_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAdjustedBalance	177,562,000
Cumulative Effect of Adoption of ASU No 2016-13, Net of Taxes	mkl_CumulativeEffectofAdoptionofASUNo201613NetofTaxes	0
Cumulative effect of change in accounting policy	mkl_CumulativeEffectOfChangeInAccountingPolicy	0
Retained Earnings [Member]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Adjusted Balance	mkl_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAdjustedBalance	7,475,651,000
Cumulative Effect of Adoption of ASU No 2016-13, Net of Taxes	mkl_CumulativeEffectofAdoptionofASUNo201613NetofTaxes	(3,827,000)
Cumulative effect of change in accounting policy	mkl_CumulativeEffectOfChangeInAccountingPolicy	$ 22,302,000