10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

___________________________________________________________________________________________

Form 10-Q

ý QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d)

OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended March 31, 2020

OR

o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d)

OF THE SECURITIES EXCHANGE ACT OF 1934

Commission file number 001-38731

___________________________________________________________________________________________

SIRIUS INTERNATIONAL INSURANCE GROUP, LTD.

(Exact name of registrant as specified in its charter)

Bermuda

(State or other jurisdiction of incorporation or organization)

98-0529995

(I.R.S. Employer Identification No.)

14 Wesley Street, Hamilton HM 11, Bermuda

(Address of principal executive offices)

(441) 278-3140

(Registrant's telephone number, including area code)

___________________________________________________________________________________________

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

Title of each class	Trading symbol	Name of each exchange on which registered
Common shares, par value $0.01 per share	SG	Nasdaq Global Select Market

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 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 ý No o

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 ý No o

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 o  Accelerated filer o  Non-accelerated filer ý  Smaller reporting company ý  Emerging growth company o

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. o

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

At April 30, 2020, there were 115,299,341 Common Shares, $0.01 par value per share, of the registrant outstanding.

SIRIUS INTERNATIONAL INSURANCE GROUP, LTD.

INDEX TO FORM 10-Q

		Page
Part I	Financial Information	1
	Cautionary Note Regarding Forward-Looking Statements	1
Item 1.	Unaudited Consolidated Financial Statements	3
	Consolidated Balance Sheets at March 31, 2020 and December 31, 2019	3
	Consolidated Statement of Income for the three months ended March 31, 2020 and 2019	4
	Consolidated Statements of Comprehensive Income for the three months ended March 31, 2020 and 2019	5
	Consolidated Statements of Shareholders' Equity for the three months ended March 31, 2020 and 2019	6
	Consolidated Statements of Cash Flows for the three months ended March 31, 2020 and 2019	7
	Notes to Consolidated Financial Statements	8
Item 2.	Management's Discussion and Analysis of Financial Condition and Results of Operations	41
Item 3.	Quantitative and Qualitative Disclosures About Market Risk	66
Item 4.	Controls and Procedures	66
Part II	Other Information	67
Item 1.	Legal Proceedings	67
Item 1A.	Risk Factors	67
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	69
Item 3.	Defaults Upon Senior Securities	69
Item 4.	Mine Safety Disclosures	70
Item 5.	Other Information	70
Item 6.	Exhibits	71
	Signatures	72

PART I. FINANCIAL INFORMATION

Cautionary Note Regarding Forward-Looking Statements

This Quarterly Report on Form 10-Q contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934, including statements about the future financial condition, results of operations and operating activities of Sirius International Insurance Group, Ltd. (the "Company" and, together with its subsidiaries, "Sirius Group"), including impacts of the COVID-19 pandemic on its business, operations and loss reserve estimates. Forward-looking statements are typically identified by words such as "plan," "believe," "expect," "anticipate," "intend," "outlook," "estimate," "forecast," "project," "target," "continue," "could," "may," "might," "will," "possible," "potential," "predict," "should," "would," "seeks," "likely" and other similar words and expressions, but the absence of these words does not mean that a statement is not forward-looking. The forward-looking statements are based on the current expectations of the management of the Company and speak only as of the date of this Quarterly Report on Form 10-Q. There can be no assurance that future developments will be those that have been anticipated. These forward-looking statements involve a number of risks, uncertainties or other assumptions that may cause actual results or performance to be materially different from those expressed or implied by these forward-looking statements. These risks and uncertainties include, but are not limited to, the following:

• the continued impact of the COVID-19 pandemic on Sirius Group’s business, operations and loss reserve estimates;

• the effect of judicial, legislative and regulatory actions to address and contain the impact of COVID-19;

• theuncertainty as to the estimate of ultimate industry loss claims;

• the general economic conditions and market conditions in the markets in which Sirius Group operates;

• Sirius Group's exposure to unpredictable catastrophic and casualty events and unexpected accumulations of attritional losses;

• increased competition from existing insurers and reinsurers and from alternative capital providers, such as insurance-linked funds and collateralized special purpose insurers;

• decreased demand for Sirius Group's insurance or reinsurance products, consolidation and cyclical changes in the insurance and reinsurance industry;

• the inherent uncertainty of estimating loss and loss adjustment expenses reserves, including asbestos and environmental reserves, and the possibility that such reserves may be inadequate to cover Sirius Group's ultimate liability for losses;

• a decline in or withdrawal of Sirius Group's operating subsidiaries' ratings with rating agencies;

• the exposure of Sirius Group's investments to interest rate, credit, equity risks and market volatility, which may limit Sirius Group's net income and may affect the adequacy of its capital and liquidity;

• losses related to cyber-attacks on Sirius Group's information technology systems;

• the impact of various risks associated with transacting business in foreign countries, including foreign currency exchange-rate risk and political risks on investments in, and revenues from, Sirius Group's operations outside the U.S.;

• the possibility that Sirius Group may become subject to additional onerous governmental or regulatory requirements or fail to comply with applicable regulatory and solvency requirements;

• Sirius Group's significant deferred tax assets may become materially impaired as a result of insufficient taxable income or a reduction in applicable corporate tax rates or other change in applicable tax law;

• a decrease in the fair value of Global A&H and/or Sirius Group's intangible assets may result in future impairments;

• the limited liquidity and trading of the Company's securities;

• CMIG International Holding Pte. Ltd.'s status as a majority shareholder, including its affiliates' liquidity issues, and actions taken by CMIG International Holding Pte. Ltd. or any other parties in interest in connection with such liquidity issues including ownership changes;

1

• Sirius Group's status as a publicly traded company, foreign private issuer and controlled company;

• the consequences of the written resolution of Sirius Group's majority shareholder which may prohibit the Board of Sirius Group from issuing any form of equity without shareholder approval;

• the impact of lawsuits initiated by minority shareholders, including lawsuits claiming that they are being unfairly oppressed by Sirius Group’s majority shareholder or lawsuits claiming a right of redemption of the Series B preference shares; and

• other risks identified elsewhere in this Quarterly Report on Form 10-Q, the Company's Annual Report on Form 10-K for the year ended December 31, 2019 and in the Company's other filings with the U.S. Securities and Exchange Commission.

Should one or more of these risks or uncertainties materialize, or should any of the assumptions made by the management of the Company prove incorrect, actual results may vary in material respects from those projected in these forward-looking statements. Except to the extent required by applicable law or regulation, Sirius Group undertakes no obligation to update these forward-looking statements to reflect events or circumstances after the date of this Quarterly Report on Form 10-Q.

2

ITEM 1. CONSOLIDATED FINANCIAL STATEMENTS

Sirius International Insurance Group, Ltd.

Consolidated Balance Sheets

As at March 31, 2020 and December 31, 2019

(Expressed in millions of U.S. dollars, except share information)	March 31, 2020			December 31, 2019
	Unaudited
Assets
Fixed maturity investments, trading, at fair value (Amortized cost 2020: $1,705.0; 2019: $1,656.6)	$	1,732.1		$	1,681.0
Short-term investments, at fair value (Amortized cost 2020: $1,032.7; 2019: $1,090.8)	1,041.8			1,085.2
Equity securities, trading, at fair value (Cost 2020: $409.5; 2019: $379.2)	366.6			405.2
Other long-term investments, at fair value (Cost 2020: $323.2; 2019: $315.4)	355.5			346.8
Cash	140.5			136.3
Restricted cash	15.3			14.3
Total investments and cash	3,651.8			3,668.8
Accrued investment income	10.9			11.2
Insurance and reinsurance premiums receivable	964.2			730.1
Reinsurance recoverable on unpaid losses	444.2			410.3
Reinsurance recoverable on paid losses	85.7			73.9
Funds held by ceding companies	260.5			293.9
Ceded unearned insurance and reinsurance premiums	245.5			162.0
Deferred acquisition costs	168.2			148.2
Deferred tax asset	171.0			166.7
Accounts receivable on unsettled investment sales	35.2			6.7
Goodwill	400.8			400.8
Intangible assets	175.9			179.8
Other assets	143.7			161.4
Total assets	$	6,757.6		$	6,413.8
Liabilities
Loss and loss adjustment expense reserves	$	2,519.6		$	2,331.5
Unearned insurance and reinsurance premiums	979.2			708.0
Ceded reinsurance payable	332.8			244.7
Funds held under reinsurance treaties	148.0			169.1
Deferred tax liability	183.5			205.9
Debt	664.8			685.2
Accounts payable on unsettled investment purchases	53.0			2.3
Other liabilities	200.4			201.3
Total liabilities	5,081.3			4,548.0
Commitments and contingencies (see Note 19)
Mezzanine equity
Series B preference shares	199.6			223.0
Common shareholders' equity
Common shares (shares issued and outstanding, 2020 & 2019: 115,299,341)	1.2			1.2
Additional paid-in surplus	1,100.1			1,098.2
Retained earnings	673.7			778.5
Accumulated other comprehensive (loss)	(300.9		)	(237.5		)
Total common shareholders' equity	1,474.1			1,640.4
Non-controlling interests	2.6			2.4
Total equity	1,476.7			1,642.8
Total liabilities, mezzanine equity, and equity	$	6,757.6		$	6,413.8

See Notes to Consolidated Financial Statements

3

Sirius International Insurance Group, Ltd.

Consolidated Statements of (Loss) Income

For the three months ended March 31, 2020 and 2019

Unaudited

	Three months ended March 31,
(Expressed in millions of U.S. dollars, except share and per share information)	2020			2019
Revenues
Net earned insurance and reinsurance premiums	$	434.7		$	311.9
Net investment income	13.5			20.1
Net realized investment gains	20.3			9.0
Net unrealized investment (losses) gains	(43.8		)	74.0
Net foreign exchange gains	18.5			5.1
Other revenue	4.3			19.6
Total revenues	447.5			439.7
Expenses
Loss and loss adjustment expenses	427.1			183.9
Insurance and reinsurance acquisition expenses	74.7			63.3
Other underwriting expenses	38.0			35.3
General and administrative expenses	32.1			24.4
Intangible asset amortization expenses	3.9			3.9
Interest expense on debt	7.8			7.6
Total expenses	583.6			318.4
Pre-tax (loss) income	(136.1		)	121.3
Income tax benefit (expense)	14.8			(17.2		)
Net (loss) income	(121.3		)	104.1
Income attributable to non-controlling interests	(0.2		)	(0.4		)
(Loss) income attributable to Sirius Group	(121.5		)	103.7
Change in carrying value of Series B preference shares	23.4			(8.4		)
Net (loss) income attributable to Sirius Group's common shareholders	$	(98.1	)	$	95.3
Net (loss) income per common share and common share equivalent
Basic earnings per common share and common share equivalent	$	(0.85	)	$	0.75
Diluted earnings per common share and common share equivalent	$	(0.96	)	$	0.74
Weighted average number of common shares and common share equivalents outstanding:
Basic weighted average number of common shares and common share equivalents outstanding	115,262,302			115,182,331
Diluted weighted average number of common shares and common share equivalents outstanding	127,163,972			127,335,314

See Notes to Consolidated Financial Statements

4

Sirius International Insurance Group, Ltd.

Consolidated Statements of Comprehensive (Loss) Income

For the three months ended March 31, 2020 and 2019

Unaudited

	Three months ended March 31,
(Expressed in millions of U.S. dollars)	2020			2019
Comprehensive (loss) income
Net (loss) income	$	(121.3	)	$	104.1
Other comprehensive (loss)
Change in foreign currency translation, net of tax	(63.4		)	(27.8		)
Total other comprehensive (loss)	(63.4		)	(27.8		)
Comprehensive (loss) income	(184.7		)	76.3
Net (income) attributable to non-controlling interests	(0.2		)	(0.4		)
Comprehensive (loss) income attributable to Sirius Group	$	(184.9	)	$	75.9

See Notes to Consolidated Financial Statements

5

Sirius International Insurance Group, Ltd.

Consolidated Statements of Shareholders' Equity

For the three months ended March 31, 2020 and 2019

Unaudited

	Three months ended March 31,
(Expressed in millions of U.S. dollars)	2020			2019
Common shares
Balance at beginning and end of period	$	1.2		$	1.2
Additional paid-in surplus
Balance at beginning of period	1,098.2			1,089.1
Share-based compensation	1.9			1.2
Other, net	—			(0.1		)
Balance at end of period	1,100.1			1,090.2
Retained earnings
Balance at beginning of period	778.5			816.6
Cumulative effect of an accounting change	(6.8		)	—
Balance at beginning of period, as adjusted	771.7			816.6
Net (loss) income	(121.3		)	104.1
Income attributable to non-controlling interests	(0.2		)	(0.4		)
Change in carrying value of Series B preference shares	23.4			(8.4		)
Other, net	0.1			(0.1		)
Balance at end of period	673.7			911.8
Accumulated other comprehensive (loss)
Balance at beginning of period	(237.5		)	(202.4		)
Accumulated net foreign currency translation (losses)
Balance at beginning of period	(237.5		)	(202.4		)
Net change in foreign currency translation	(63.4		)	(27.8		)
Balance at the end of period	(300.9		)	(230.2		)
Balance at the end of period	(300.9		)	(230.2		)
Total common shareholders' equity	$	1,474.1		$	1,773.0
Non-controlling interests	2.6			2.2
Total equity	$	1,476.7		$	1,775.2

See Notes to Consolidated Financial Statements

6

Sirius International Insurance Group, Ltd.

Consolidated Statements of Cash Flows

For the three months ended March 31, 2020 and 2019

Unaudited

	Three months ended March 31,
(Expressed in millions of U.S. dollars)	2020			2019
Cash flows from operations:
Net (loss) income	$	(121.3	)	$	104.1
Adjustments to reconcile net income to net cash provided from operations:
Net realized and unrealized investment losses (gains)	23.5			(83.0		)
Amortization of premium on fixed maturity investments	0.4			(0.8		)
Amortization of intangible assets	3.9			3.9
Depreciation and other amortization	1.7			2.2
Share-based compensation	1.9			1.2
Other operating items:
Net change in loss and loss adjustment expense reserves	278.6			(1.1		)
Net change in reinsurance recoverable on paid and unpaid losses	(91.1		)	(8.7		)
Net change in funds held by ceding companies	22.5			(20.1		)
Net change in unearned insurance and reinsurance premiums	309.5			232.4
Net change in ceded reinsurance payable	111.3			37.7
Net change in ceded unearned insurance and reinsurance premiums	(96.6		)	(47.6		)
Net change in insurance and reinsurance premiums receivable	(280.5		)	(208.8		)
Net change in deferred acquisition costs	(26.4		)	(14.2		)
Net change in funds held under reinsurance treaties	(12.7		)	15.4
Net change in current and deferred income taxes, net	(11.5		)	9.1
Net change in other assets and liabilities, net	2.0			2.9
Net cash provided from operations	115.2			24.6
Cash flows from investing activities:
Net change in short-term investments	33.8			(120.1		)
Sales of fixed maturities and convertible fixed maturity investments	99.3			135.1
Maturities, calls, and paydowns of fixed maturity and convertible fixed maturity investments	62.0			59.3
Sales of common equity securities	205.0			45.9
Distributions, redemptions, and maturities of other long-term investments	7.4			15.3
Return of principal on loan participations	0.1			—
Contributions to other long-term investments	(17.6		)	(25.0		)
Purchases of common equity securities	(253.6		)	(39.8		)
Purchases of fixed maturities and convertible fixed maturity investments	(261.2		)	(105.1		)
Net change in unsettled investment purchases and sales	22.5			10.0
Other, net	(0.4		)	0.3
Net cash (used for) investing activities	(102.7		)	(24.1		)
Cash flows from financing activities:
Change in collateral held on Interest Rate Cap	—			(0.1		)
Net cash (used for) from financing activities	—			(0.1		)
Effect of exchange rate changes on cash	(7.3		)	(3.6		)
Net increase (decrease) in cash during period	5.2			(3.2		)
Cash and restricted cash balance at beginning of period	150.6			132.2
Cash and restricted cash balance at end of period	$	155.8		$	129.0

See Notes to Consolidated Financial Statements

7

Sirius International Insurance Group, Ltd.

Notes to Consolidated Financial Statements

Unaudited

Note 1. General

Sirius International Insurance Group, Ltd. ("the Company") is a Bermuda exempted company that provides multi-line insurance and reinsurance on a worldwide basis through its subsidiaries (collectively with the Company, "Sirius Group").

Note 2. Summary of significant accounting policies

Basis of presentation

The accompanying Unaudited Consolidated Financial Statements at March 31, 2020, have been prepared in accordance with generally accepted accounting principles in the United States of America ("GAAP") and the rules and regulations of the U.S. Securities and Exchange Commission ("SEC") for interim financial information. The accompanying Unaudited Consolidated Financial Statements present the consolidated results of operations, financial condition, and cash flows of the Company and its subsidiaries and those entities in which the Company has control and a majority economic interest as well as those variable interest entities ("VIEs") that meet the requirements for consolidation. All significant intercompany transactions have been eliminated in consolidation.

These Unaudited Consolidated Financial Statements do not include all disclosures normally included in annual financial statements prepared in accordance with GAAP and should be read in conjunction with the Audited Consolidated Financial Statements and the related notes for the year ended December 31, 2019. The consolidated financial information as of December 31, 2019 included herein has been derived from the Audited Consolidated Financial Statements as of December 31, 2019.

Effective January 1, 2020, the Company changed its reportable segments. The change in reportable segments had no impact on the Company’s historical consolidated financial positions, results of operations or cash flows as previously reported. Where applicable, all prior periods presented have been revised to conform to this new presentation.

The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities as of the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. In the opinion of management, the accompanying Unaudited Consolidated Financial Statements reflect all adjustments (consisting of normally recurring accruals) necessary for a fair statement of results on an interim basis. Tabular dollar amounts are in millions, with the exception of share and per share amounts. All amounts are reported in U.S. dollars, except where noted otherwise.

Recently adopted changes in accounting principles

Credit losses

Effective January 1, 2020, Sirius Group adopted Accounting Standards Update ("ASU") 2016-13, Measurement of Credit Losses on Financial Instruments (ASC 326), which establishes new guidance for the recognition of credit losses for financial assets measured at amortized cost ("current expected credit losses" or "CECL"). The guidance applies to financial assets that have the contractual right to receive cash, including reinsurance receivables and recoverables and requires reporting entities to estimate the credit losses expected over the life of a credit exposure using historical information, current information and reasonable and supportable forecasts that affect the collectability of the financial asset. The expected credit losses, and subsequent adjustments to such losses, are recorded through an allowance account that is deducted from the amortized cost basis of the financial asset, with the net carrying value of the financial asset presented on the consolidated balance sheet at the amount expected to be collected. Sirius Group adopted the new guidance using a modified retrospective transition method through a cumulative-effect adjustment to retained earnings.

As a result of the adoption of the new guidance, Sirius Group estimated a total CECL allowance of $14.9 million. The adoption of this guidance did not materially impact our results of operations or cash flows. Due to the adoption of the standard using the retrospective cumulative-effect adjustment method, the Company recorded $(6.8) million cumulative-effect adjustment net of taxes to its opening retained earnings. (See Note 7.)

8

Sirius International Insurance Group, Ltd.

Notes to Consolidated Financial Statements

Unaudited

Fair Value Measurement Disclosures

Effective January 1, 2020, Sirius Group adopted ASU 2018-13, Fair Value Measurement (Topic 820): Disclosure Framework—Changes to the Disclosure Requirements for Fair Value Measurement, which modifies the disclosure requirements of fair value measurements. The adoption of this guidance did not have any impact on the consolidated financial statements but expanded disclosure of the ranges and weighted averages of significant unobservable inputs used in Level 3 fair values. (See Note 9.)

Simplifying the Accounting for Income Taxes

Effective January 1, 2020, Sirius Group adopted ASU 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes, which eliminates certain exceptions, and clarifies and simplifies certain aspects of accounting for income taxes. Sirius Group has fully adopted all provisions of the guidance with consideration of the various transition methods.

Sirius Group adopted the removal of the exception to the general methodology for calculating income taxes in an interim period when a year-to-date loss exceeds the anticipated loss for the year. The removal of this exception allowed Sirius Group to record a benefit for a year-to-date loss in excess of its forecasted loss in certain jurisdictions. The removal of this exception was applied prospectively to the Income tax benefit (expense) line on the Consolidated Statements of Income.

Sirius Group adopted all other provisions in the guidance, including the requirement for an entity to recognize a franchise tax (or similar tax) that is partially based on income as an income-based tax and account for any incremental amount incurred as a non-income-based tax through a cumulative-effect adjustment to retained earnings. These provisions did not have a material impact on the Consolidated Financial Statements or were not applicable to Sirius Group.

Note 3. Significant transactions

Loss portfolio transfer

On January 23, 2020, Sirius Group entered into a loss portfolio transfer with Pacific Re, Inc. Under the agreement, Sirius Group received $69.7 million in cash and assumed net undiscounted loss and LAE reserves with the same value. In addition, Sirius Group recognized Gross written premium and Loss and losses adjustment expenses for $69.7 million.

Note 4. Segment information

On December 31, 2019, Sirius Group completed an internal reorganization and beginning on January 1, 2020, Sirius Group's reportable segments consist of four reportable segments – Global Reinsurance, Global Accident & Health ("Global A&H"), U.S. Specialty, and Runoff & Other. The accounting policies of the reportable segments are the same as those used for the preparation of the Company's consolidated financial statements.

The Company's Global Reinsurance, Global A&H, U.S. Specialty, and Runoff & Other reportable segments each have managers who are responsible for the overall profitability of their respective segments and who are directly accountable to the Company's chief operating decision maker, the Chief Executive Officer ("CEO") of the Company. The CEO assesses segment operating performance, allocates capital, and makes resource allocation decisions based on Technical profit (loss), Underwriting profit (loss), and Underwriting profit (loss), including net service fee revenue.

Segment results are shown prior to corporate eliminations. Corporate eliminations are shown to reconcile to consolidated Technical profit (loss), consolidated Underwriting profit (loss) and consolidated Underwriting profit (loss), including net service fee revenue.

Sirius Group does not allocate its assets by segment, with the exception of goodwill and intangible assets, and, accordingly, investment income is not allocated to each segment. The internal reorganization had no impact to the allocation of goodwill and intangible assets to the Global A&H segment. Where applicable, all prior periods presented have been revised to conform to this new presentation.

9

Sirius International Insurance Group, Ltd.

Notes to Consolidated Financial Statements

Unaudited

Global Reinsurance

Global Reinsurance consists of Sirius Group's underwriting lines of business that offer Other Property, Property Catastrophe Excess Reinsurance, Agriculture Reinsurance, Aviation & Space, Marine & Energy, Trade Credit, Contingency, and Casualty Reinsurance:

Other Property—Sirius Group participates in the broker market for property reinsurance treaties written on a proportional and excess of loss basis. For Sirius Group's international business, the book consists of treaty, written on both a proportional and excess of loss basis, facultative, and primary business, primarily in Europe, Asia and Latin America. In the United States, the book predominantly centers on significant participations on proportional and excess of loss treaties mostly in the excess and surplus lines segment of the market.

Property Catastrophe Excess Reinsurance—Property catastrophe excess of loss reinsurance treaties cover losses from catastrophic events. Sirius Group writes a worldwide book with the largest concentration of exposure in Europe and the United States. The U.S. book written in Bermuda has a national account focus supporting principally the lower and/or middle layers of large capacity programs. Additionally, Stockholm writes a U.S. book mainly consisting of select small regional and standard lines carriers. The exposures written in the international book are diversified across many countries, regions, perils and layers.

Agriculture Reinsurance—Sirius Group provides stop-loss reinsurance coverage to companies writing U.S. government-sponsored multi-peril crop insurance ("MPCI"). Sirius Group's participation is net of the government's stop-loss reinsurance protection. Sirius Group also provides coverage for crop-hail and certain named perils when bundled with MPCI business. Sirius Group also writes agriculture business outside of the United States.

Aviation & Space—Sirius Group provides aviation insurance that covers loss of or damage to an aircraft and the aircraft operations' liability to passengers, cargo and hull as well as to third parties. Additionally, liability arising out of non-aircraft operations such as hangars, airports and aircraft products can be covered. Space insurance primarily covers loss of or damage to a satellite during launch and in orbit. The book consists of treaty, written on both a proportional and excess of loss basis, facultative, and primary business.

Marine & Energy—Sirius Group provides marine & energy reinsurance, primarily written on an excess of loss and proportional basis. Coverage offered includes damage to ships and goods in transit, marine liability lines, and offshore energy industry insurance. Sirius Group also writes yacht business, both on reinsurance and a primary basis. The marine & energy portfolio is diversified across many countries and regions.

Trade Credit—Sirius Group writes credit and bond reinsurance worldwide. The bulk of the business is traditional short-term commercial credit insurance, covering pre-agreed domestic and export sales of goods and services with typical coverage periods of 60 to 120 days. Losses under these policies are correlated to adverse changes in a respective country's gross national product.

Contingency—Sirius Group underwrote a contingency insurance book primarily for event cancellation and non-appearance.  Additionally, coverage for probability based risks with prize redemption was also offered. The contingency insurance business was exited in 2018 with no new exposures written; however, Sirius Group continues to offer this class on a treaty reinsurance basis on a selective basis for a few key clients.

CasualtyReinsurance—Sirius Group underwrites a cross section of all casualty lines, including general liability, umbrella, auto, workers compensation, professional liability, and other specialty classes, written on a proportional and excess of loss basis.

Global A&H

Global A&H consists of Sirius Group’s insurance and reinsurance business, and the managing general underwriting (“MGU”) units (which include ArmadaCorp Capital, LLC ("Armada") and International Medical Group, Inc. ("IMG")). Armada’s products are offered in the United States while IMG and the insurance and reinsurance business write accident and health products on a worldwide basis:

Accident and Health insurance and reinsurance—Sirius Group is an insurer of accident and health business in the United States and internationally, on either an admitted or surplus lines basis, as well as a reinsurer of medical expense, travel and personal accident on a treaty or facultative basis worldwide. The MGU unit writes health insurance business worldwide through IMG and within the United States via Armada.

10

Sirius International Insurance Group, Ltd.

Notes to Consolidated Financial Statements

Unaudited

U.S. Specialty

U.S. Specialty consists of Sirius Group's specialty insurance product offerings, which currently includes Environmental, Surety, and Workers’ Compensation.

Environmental underwrites a pure environmental insurance book in the United States consisting of four core products that revolve around pollution coverage, which are premises pollution liability, contractor's pollution liability, contractor's pollution and professional liability.

Surety underwrites commercial surety bonds, including non-construction contract bonds, in a broad range of business segments in the United States.

Workers’ Compensation, is a state-mandated insurance program that provides medical, disability, survivor, burial, and rehabilitation benefits to employees who are injured or killed due to a work-related injury or illness.

Runoff & Other

Runoff & Other includes the results of Sirius Global Solutions Holding Company ("Sirius Global Solutions"), which specializes in the acquisition and management of runoff liabilities for insurance and reinsurance companies, both in the United States and internationally, as well as asbestos risks, environmental risks and other long-tailed liability exposures.

11

Sirius International Insurance Group, Ltd.

Notes to Consolidated Financial Statements

Unaudited

The following tables summarize the segment results for the three months ended March 31, 2020 and 2019:

	For the three months ended March 31, 2020
(Expressed in millions of U.S. dollars)	Global Reinsurance			Global A&H			U.S. Specialty			Runoff & Other			Corporate Elimination			Total
Gross written premiums	$	465.3		$	262.1		$	20.8		$	69.4		$	—		$	817.6
Net written premiums	$	345.4		$	200.7		$	15.2		$	68.6		$	—		$	629.9
Net earned insurance and reinsurance premiums	$	235.0		$	117.9		$	12.8		$	69.0		$	—		$	434.7
Loss and allocated LAE(1)	(257.2		)	(80.3		)	(7.7		)	(68.9		)	—			(414.1		)
Insurance and reinsurance acquisition expenses	(50.9		)	(30.8		)	(3.0		)	(0.4		)	10.4			(74.7		)
Technical profit	(73.1		)	6.8			2.1			(0.3		)	10.4			(54.1		)
Unallocated LAE(2)	(5.0		)	(1.7		)	(0.1		)	(0.8		)	(5.4		)	(13.0		)
Other underwriting expenses	(21.3		)	(5.6		)	(5.2		)	(0.9		)	(5.0		)	(38.0		)
Underwriting income	(99.4		)	(0.5		)	(3.2		)	(2.0		)	—			(105.1		)
Service fee revenue(3)	—			35.9			—			—			(11.0		)	24.9
Managing general underwriter unallocated LAE	—			(6.0		)	—			—			6.0			—
Managing general underwriter other underwriting expenses	—			(5.0		)	—			—			5.0			—
General and administrative expenses, MGU + Runoff & Other(4)	—			(14.2		)	—			(1.5		)	—			(15.7		)
Underwriting (loss) income, including net service fee income	(99.4		)	10.2			(3.2		)	(3.5		)	—			(95.9		)
Net investment income																13.5
Net realized investment gains																20.3
Net unrealized investment (losses) gains																(43.8		)
Net foreign exchange gains																18.5
Other revenue(5)																(20.6		)
General and administrative expenses(6)																(16.4		)
Intangible asset amortization expenses																(3.9		)
Interest expense on debt																(7.8		)
Pre-tax (loss) income																$	(136.1	)
Underwriting Ratios
Loss ratio	111.6		%	69.6		%	60.9		%	NM			NM			98.3		%
Acquisition expense ratio	21.7		%	26.1		%	23.4		%	NM			NM			17.2		%
Other underwriting expense ratio	9.1		%	4.7		%	40.6		%	NM			NM			8.7		%
Combined ratio(7)	142.4		%	100.4		%	124.9		%	NM			NM			124.2		%
Goodwill and intangible assets(8)	$	—		$	568.6		$	—		$	8.1		$	—		$	576.7

⁽¹⁾Loss and allocated loss adjustment expenses ("LAE") are part of Loss and loss adjustment expenses on the Consolidated Statements of Income (the sum of Loss and allocated LAE and Unallocated LAE is equal to Loss and loss adjustment expenses on the Consolidated Statements of Income).

⁽²⁾Unallocated LAE are part of Loss and loss adjustment expenses on the Consolidated Statements of Income (the sum of Loss and allocated LAE and Unallocated LAE is equal to Loss and loss adjustment expenses on the Consolidated Statements of Income).

⁽³⁾Service fee revenue is part of Other revenue on the Consolidated Statements of Income (the sum of Service fee revenue and Other revenue is equal to Other revenue on the Consolidated Statements of Income).

⁽⁴⁾General and administrative expenses, MGU + Runoff & Other is part of General and administrative expenses on the Consolidated Statements of Income (the sum of General and administrative expenses, MGU + Runoff & Other and General and administrative expenses is equal to General and administrative expenses on the Consolidated Statements of Income).

⁽⁵⁾Other revenue is presented net of Service fee revenue and is comprised mainly of losses from derivatives (seeNote 12) (the sum of Service fee revenue and Other revenue is equal to Other revenue on the Consolidated Statements of Income).

⁽⁶⁾General and administrative expenses are presented net of General and administrative expenses, MGU + Runoff & Other (the sum of General and administrative expenses, MGU + Runoff & Other and General and administrative expenses is equal to General and administrative expenses on the Consolidated Statements of Income).

⁽⁷⁾Ratios considered not meaningful ("NM") to Runoff & Other and Corporate Elimination.

⁽⁸⁾Sirius Group does not allocate its assets by segment, with the exception of goodwill and intangible assets.

12

Sirius International Insurance Group, Ltd.

Notes to Consolidated Financial Statements

Unaudited

	For the three months ended March 31, 2019
(Expressed in millions of U.S. dollars)	Global Reinsurance			Global A&H			U.S. Specialty			Runoff & Other			Corporate Elimination			Total
Gross written premiums	$	435.0		$	169.3		$	16.6		$	1.4		$	—		$	622.3
Net written premiums	$	335.9		$	134.9		$	13.6		$	0.4		$	—		$	484.8
Net earned insurance and reinsurance premiums	$	211.3		$	96.1		$	4.1		$	0.4		$	—		$	311.9
Loss and allocated LAE(1)	(107.8		)	(63.2		)	(2.4		)	(1.1		)	—			(174.5		)
Insurance and reinsurance acquisition expenses	(45.6		)	(26.6		)	(0.7		)	(0.7		)	10.3			(63.3		)
Technical profit	57.9			6.3			1.0			(1.4		)	10.3			74.1
Unallocated LAE(2)	(4.0		)	(1.5		)	—			(0.5		)	(3.4		)	(9.4		)
Other underwriting expenses	(21.6		)	(6.1		)	(2.8		)	(2.1		)	(2.7		)	(35.3		)
Underwriting income	32.3			(1.3		)	(1.8		)	(4.0		)	4.2			29.4
Service fee revenue(3)	—			36.3			—			—			(11.0		)	25.3
Managing general underwriter unallocated LAE	—			(4.1		)	—			—			4.1			—
Managing general underwriter other underwriting expenses	—			(2.7		)	—			—			2.7			—
General and administrative expenses, MGU + Runoff & Other(4)	—			(16.2		)	—			(0.8		)	—			(17.0		)
Underwriting (loss) income, including net service fee income	32.3			12.0			(1.8		)	(4.8		)	—			37.7
Net investment income																20.1
Net realized investment gains																9.0
Net unrealized investment (losses) gains																74.0
Net foreign exchange gains																5.1
Other revenue(5)																(5.7		)
General and administrative expenses(6)																(7.4		)
Intangible asset amortization expenses																(3.9		)
Interest expense on debt																(7.6		)
Pre-tax (loss) income																$	121.3
Underwriting Ratios
Loss ratio	52.9		%	67.3		%	58.5		%	NM			NM			59.0		%
Acquisition expense ratio	21.6		%	27.7		%	17.1		%	NM			NM			20.3		%
Other underwriting expense ratio	10.2		%	6.3		%	68.3		%	NM			NM			11.3		%
Combined ratio(7)	84.7		%	101.3		%	143.9		%	NM			NM			90.6		%
Goodwill and intangible assets(8)	$	—		$	584.2		$	—		$	8.1		$	—		$	592.3

⁽¹⁾Loss and allocated LAE are part of Loss and loss adjustment expenses on the Consolidated Statements of Income (the sum of Loss and allocated LAE and Unallocated LAE is equal to Loss and loss adjustment expenses on the Consolidated Statements of Income).

⁽²⁾Unallocated LAE are part of Loss and loss adjustment expenses on the Consolidated Statements of Income (the sum of Loss and allocated LAE and Unallocated LAE is equal to Loss and loss adjustment expenses on the Consolidated Statements of Income).

⁽³⁾Service fee revenue is part of Other revenue on the Consolidated Statements of Income (the sum of Service fee revenue and Other revenue is equal to Other revenue on the Consolidated Statements of Income).

⁽⁴⁾General and administrative expenses, MGU + Runoff & Other is part of General and administrative expenses on the Consolidated Statements of Income (the sum of General and administrative expenses, MGU + Runoff & Other and General and administrative expenses is equal to General and administrative expenses on the Consolidated Statements of Income).

⁽⁵⁾Other revenue is presented net of Service fee revenue and is comprised mainly of losses from derivatives (seeNote 12) (the sum of Service fee revenue and Other revenue is equal to Other revenue on the Consolidated Statements of Income).

⁽⁶⁾General and administrative expenses are presented net of General and administrative expenses, MGU + Runoff & Other (the sum of General and administrative expenses, MGU + Runoff & Other and General and administrative expenses is equal to General and administrative expenses on the Consolidated Statements of Income).

⁽⁷⁾Ratios considered not meaningful ("NM") to Runoff & Other and Corporate Elimination.

⁽⁸⁾Sirius Group does not allocate its assets by segment, with the exception of goodwill and intangible assets.

13

Sirius International Insurance Group, Ltd.

Notes to Consolidated Financial Statements

Unaudited

The following tables provide summary information regarding net premiums written by client location and underwriting location by reportable segment for the three months ended March 31, 2020 and 2019:

	For the three months ended March 31, 2020
(Expressed in millions of U.S. dollars)	Global Reinsurance		Global A&H		U.S. Specialty		Runoff & Other		Total
Net written premiums by client location:
United States	$	104.3	$	180.7	$	15.2	$	68.1	$	368.3
Europe	172.8		7.2		—		0.3		180.3
Canada, the Caribbean, Bermuda and Latin America	29.4		6.5		—		—		35.9
Asia and Other	38.9		6.3		—		0.2		45.4
Total net written premium by client location for the three months ended March 31, 2020	$	345.4	$	200.7	$	15.2	$	68.6	$	629.9
Net written premiums by underwriting location:
United States	$	72.6	$	131.2	$	15.2	$	68.0	$	287.0
Europe	208.2		69.5		—		0.4		278.1
Canada, the Caribbean, Bermuda and Latin America	48.1		—		—		—		48.1
Asia and Other	16.5		—		—		0.2		16.7
Total written premiums by underwriting location for the three months ended March 31, 2020	$	345.4	$	200.7	$	15.2	$	68.6	$	629.9

	For the three months ended March 31, 2019
(Expressed in millions of U.S. dollars)	Global Reinsurance		Global A&H		U.S. Specialty		Runoff & Other		Total
Net written premiums by client location:
United States	$	116.6	$	111.1	$	13.6	$	0.2	$	241.5
Europe	149.5		8.0		—		0.1		157.6
Canada, the Caribbean, Bermuda and Latin America	29.0		5.0		—		—		34.0
Asia and Other	40.8		10.8		—		0.1		51.7
Total net written premium by client location for the three months ended March 31, 2019	$	335.9	$	134.9	$	13.6	$	0.4	$	484.8
Net written premiums by underwriting location:
United States	$	75.7	$	71.0	$	13.6	$	0.2	$	160.5
Europe	207.0		63.6		—		0.1		270.7
Canada, the Caribbean, Bermuda and Latin America	35.9		—		—		—		35.9
Asia and Other	17.3		0.3		—		0.1		17.7
Total written premiums by underwriting location for the three months ended March 31, 2019	$	335.9	$	134.9	$	13.6	$	0.4	$	484.8

14

Sirius International Insurance Group, Ltd.

Notes to Consolidated Financial Statements

Unaudited

Note 5. Reserves for unpaid losses and loss adjustment expenses

The following table summarizes the loss and LAE reserve activities of Sirius Group for the three months ended March 31, 2020 and 2019:

	Three months ended March 31,
(Millions)	2020			2019
Gross beginning balance	$	2,331.5		$	2,016.7
Less beginning reinsurance recoverable on unpaid losses	(410.3		)	(350.2		)
Net loss and LAE reserve balance	1,921.2			1,666.5
Losses and LAE incurred relating to:
Current year losses	422.9			167.3
Prior years losses	4.2			16.6
Total net incurred losses and LAE	427.1			183.9
Foreign currency translation adjustment to net loss and LAE reserves	(21.8		)	(3.4		)
Loss and LAE paid relating to:
Current year losses	43.1			36.2
Prior years losses	208.0			183.8
Total loss and LAE payments	251.1			220.0
Net ending balance	2,075.4			1,627.0
Plus ending reinsurance recoverable on unpaid losses	444.2			349.3
Gross ending balance	$	2,519.6		$	1,976.3

Loss and LAE development - Three Months Ended March 31, 2020

For the three months ended March 31, 2020, Sirius Group had net unfavorable loss reserve development of $4.2 million. Increases in loss reserve estimates were primarily recorded in Global Reinsurance ($9.1 million) primarily from a loss on a Lion Air crash in the Aviation & Space line of business. These increases were partially offset by favorable loss reserve development in Global A&H ($4.2 million).

Loss and LAE development - Three Months Ended March 31, 2019

For the three months ended March 31, 2019, Sirius Group had net unfavorable loss reserve development of $16.6 million. The most significant increases in loss reserve estimates were recorded in Global Reinsurance ($10.3 million) and Global A&H ($5.1 million). The unfavorable loss reserve development in Global Reinsurance was primarily attributable to higher than expected reporting from prior year catastrophe events ($15.6 million) mainly Hurricanes Irma, Michael, and Florence. In addition, there was unfavorable loss reserve development in Runoff & Other ($1.2 million).

Note 6. Third party reinsurance

In the normal course of business, Sirius Group seeks to protect its businesses from losses due to concentration of risk and losses arising from catastrophic events by reinsuring with third-party reinsurers. Sirius Group remains liable for risks reinsured in the event that the reinsurer does not honor its obligations under reinsurance contracts.

At March 31, 2020, Sirius Group had reinsurance recoverables on paid losses of $85.7 million and reinsurance recoverables of $444.2 million on unpaid losses. At December 31, 2019, Sirius Group had reinsurance recoverables on paid losses of $73.9 million and reinsurance recoverables of $410.3 million on unpaid losses. Because retrocessional reinsurance contracts do not relieve Sirius Group of its obligation to its insureds, the collectability of balances due from Sirius Group's reinsurers is important to its financial strength. Sirius Group monitors the financial strength and ratings of retrocessionaires on an ongoing basis. Uncollectible amounts historically have not been significant. (See Note 7.)

15

Sirius International Insurance Group, Ltd.

Notes to Consolidated Financial Statements

Unaudited

Note 7. Allowance for expected credit losses

Sirius Group is exposed to credit losses primarily through sales of its insurance and reinsurance products and services. The financial assets in scope of the current expected credit losses impairment model primarily include Sirius Group's premium receivables and reinsurance recoverables. Sirius Group pools the premium receivables and reinsurance recoverables by counterparty credit rating and applies a credit default rate that is determined based on the studies published by the rating agencies (e.g., A.M. Best, Standard & Poor's ("S&P")). In circumstances where ratings are unavailable, Sirius Group applies an internally developed default rate based on historical experience, reference data including research publications, and other relevant inputs.

To estimate the allowance for expected credit losses, Sirius Group considered the current and expected future economic and market conditions surrounding the COVID-19 pandemic. To the extent the current environment continues beyond our expectations or deteriorates further, we may experience further increases to our allowance for credit losses related to COVID-19.

As of March 31, 2020, Sirius Group's allowance for expected credit losses is as follows:

(in millions)	Gross Assets in Scope		Allowance for Expected Credit Losses
Premiums receivable & Funds held by ceding companies	$	1,224.7	$	10.6
Reinsurance recoverable on unpaid and paid loss	529.9		3.9
MGU Trade receivables(1)	25.6		0.4
Total as of March 31, 2020	$	1,780.2	$	14.9

⁽¹⁾Included as part of Other assets on the Consolidated Balance Sheet

Sirius Group monitors counterparty credit ratings and macroeconomic conditions, and considers the most current A.M. Best and S&P credit ratings to determine the allowance each quarter. Of the total gross assets in scope as of March 31, 2020, approximately 63% were balances with counterparties rated by either A.M. Best or S&P. Of the total rated, 76% were rated A- or better.

Note 8. Investment securities

Sirius Group's invested assets consist of investment securities and other long-term investments held for general investment purposes. The portfolio of investment securities includes fixed maturity investments, short-term investments, equity securities, and other-long term investments which are all classified as trading securities. Realized and unrealized investment gains and losses on trading securities are reported in pre-tax revenues.

Net Investment Income

Sirius Group's net investment income is comprised primarily of interest income along with associated amortization of premium and accretion of discount on Sirius Group's fixed maturity investments, dividend income from its equity investments, and interest income from its short-term investments.

Net investment income for the three months ended March 31, 2020 and 2019 consisted of the following:

	For the three months ended March 31,
(Millions)	2020			2019
Fixed maturity investments	$	10.3		$	16.8
Short-term investments	3.3			0.4
Equity securities	2.6			2.7
Other long-term investments	0.2			3.9
Total investment income	16.4			23.8
Investment expenses	(2.9		)	(3.7		)
Net investment income	$	13.5		$	20.1

16

Sirius International Insurance Group, Ltd.

Notes to Consolidated Financial Statements

Unaudited

Net Realized and Unrealized Investment Gains (Losses)

Net realized and unrealized investment gains (losses) for the three months ended March 31, 2020 and 2019 consisted of the following:

	For the three months ended March 31,
(Millions)	2020			2019
Gross realized gains	$	42.0		$	14.1
Gross realized (losses)	(21.7		)	(5.1		)
Net realized gains on investments(1)	20.3			9.0
Net unrealized gains (losses) on investments(2)	(43.8		)	74.0
Net realized and unrealized gains (losses) on investments	$	(23.5	)	$	83.0

⁽¹⁾Includes $11.1 and $10.9 of realized gains due to foreign currency for the three months ended March 31, 2020 and 2019, respectively.

⁽²⁾Includes $52.7 and $25.0 of unrealized gains due to foreign currency for the three months ended March 31, 2020 and 2019, respectively.

Net realized investment gains

Net realized investment gains for the three months ended March 31, 2020 and 2019 consisted of the following:

	For the three months ended March 31,
(Millions)	2020		2019
Fixed maturity investments	$	7.8	$	6.8
Equity securities	0.5		(0.6		)
Short-term investments	2.8		0.1
Derivative instruments	8.3		(0.6		)
Other long-term investments	0.9		3.3
Net realized investment gains	$	20.3	$	9.0

Net unrealized investment gains (losses)

Net unrealized investment gains (losses) for the three months ended March 31, 2020 and 2019 consisted of the following:

	For the three months ended March 31,
(Millions)	2020			2019
Fixed maturity investments	$	7.9		$	29.7
Equity securities	(69.1		)	25.1
Short-term investments	15.7			2.7
Derivative instruments	0.1			(0.6		)
Other long-term investments	1.6			17.1
Net unrealized investment gains (losses)	$	(43.8	)	$	74.0

17

Sirius International Insurance Group, Ltd.

Notes to Consolidated Financial Statements

Unaudited

The following table summarizes the amount of total gains (losses) included in earnings attributable to unrealized investment gains (losses) for Level 3 investments for the three months ended March 31, 2020 and 2019:

	For the three months ended March 31,
(Millions)	2020			2019
Fixed maturity investments	$	0.3		$	—
Equity securities	—			—
Other long-term investments	(0.9		)	8.8
Total unrealized investment (losses) gains – Level 3 investments	$	(0.6	)	$	8.8

Investment Holdings

Fixed maturity investments

The cost or amortized cost, gross unrealized investment gains (losses), net foreign currency gains (losses), and fair value of Sirius Group's fixed maturity investments as of March 31, 2020 and December 31, 2019, were as follows:

	March 31, 2020
(Millions)	Cost or amortized cost		Gross unrealized gains		Gross unrealized (losses)			Net foreign currency gains (losses)		Fair value
Corporate debt securities	$	424.5	$	2.8	$	(5.0	)	$	22.0	$	444.3
Asset-backed securities	551.9		1.9		(30.1		)	0.7		524.4
Residential mortgage-backed securities	443.5		23.1		(1.2		)	6.5		471.9
U.S. government and government agency	119.9		6.8		(0.1		)	1.6		128.2
Commercial mortgage-backed securities	97.4		1.6		(5.0		)	0.3		94.3
Non-U.S. government and government agency	60.4		0.4		(0.4		)	0.4		60.8
Preferred stocks	5.8		0.9		(0.2		)	—		6.5
U.S. States, municipalities and political subdivision	1.6		—		—			0.1		1.7
Total fixed maturity investments	$	1,705.0	$	37.5	$	(42.0	)	$	31.6	$	1,732.1

	December 31, 2019
(Millions)	Cost or amortized cost		Gross unrealized gains		Gross unrealized (losses)			Net foreign currency gains (losses)			Fair value
Corporate debt securities	$	458.6	$	5.2	$	(1.2	)	$	11.5		$	474.1
Asset-backed securities	489.4		1.4		(3.9		)	(0.1		)	486.8
Residential mortgage-backed securities	426.2		10.5		(1.4		)	3.6			438.9
U.S. government and government agency	111.5		0.7		(0.4		)	(1.3		)	110.5
Commercial mortgage-backed securities	88.5		0.9		(0.6		)	0.2			89.0
Non-U.S. government and government agency	63.7		—		(0.7		)	—			63.0
Preferred stocks	17.0		—		—			—			17.0
U.S. States, municipalities and political subdivision	1.7		—		—			—			1.7
Total fixed maturity investments	$	1,656.6	$	18.7	$	(8.2	)	$	13.9		$	1,681.0

The weighted average duration of Sirius Group's fixed income portfolio as of March 31, 2020 was approximately 1.5 years, including short-term investments, and approximately 2.3 years excluding short-term investments.

18

Sirius International Insurance Group, Ltd.

Notes to Consolidated Financial Statements

Unaudited

The cost or amortized cost and fair value of Sirius Group's fixed maturity investments as of March 31, 2020 and December 31, 2019 are presented below by contractual maturity. Actual maturities could differ from contractual maturities because borrowers may have the right to call or prepay certain obligations with or without call or prepayment penalties.

	March 31, 2020				December 31, 2019
(Millions)	Cost or amortized cost		Fair value		Cost or amortized cost		Fair value
Due in one year or less	$	106.2	$	112.9	$	85.0	$	88.4
Due after one year through five years	429.1		446.3		479.1		490.3
Due after five years through ten years	45.9		47.0		46.3		46.0
Due after ten years	25.2		28.8		25.1		24.6
Mortgage-backed and asset-backed securities	1,092.8		1,090.6		1,004.1		1,014.7
Preferred stocks	5.8		6.5		17.0		17.0
Total	$	1,705.0	$	1,732.1	$	1,656.6	$	1,681.0

The following table summarizes the ratings and fair value of fixed maturity investments held in Sirius Group's investment portfolio as of March 31, 2020 and December 31, 2019:

(Millions)	March 31, 2020		December 31, 2019
AAA	$	588.4	$	559.8
AA	786.8		724.3
A	208.5		219.0
BBB	88.0		95.8
Other	60.4		82.1
Total fixed maturity investments(1)	$	1,732.1	$	1,681.0

⁽¹⁾Credit ratings are assigned based on the following hierarchy: 1) Standard & Poor's ("S&P") and 2) Moody's Investors Service ("Moody's").

At March 31, 2020, the above totals included $37.8 million of sub-prime securities. Of this total, $18.3 million was rated AAA, $17.2 million rated AA, $2.2 million rated A and $0.1 million classified as Other. At December 31, 2019, the above totals included $43.3 million of sub-prime securities. Of this total, $21.7 million was rated AAA, $18.4 million rated AA, $3.1 million rated A and $0.1 million classified as Other.

Equity securities and Other long-term investments

The cost or amortized cost, gross unrealized investment gains and losses, net foreign currency gains, and fair values of Sirius Group's equity securities and other long-term investments as of March 31, 2020 and December 31, 2019, were as follows:

	March 31, 2020
(Millions)	Cost or amortized cost		Gross unrealized gains		Gross unrealized losses			Net foreign currency gains		Fair value
Equity securities	$	409.5	$	37.4	$	(98.4	)	$	18.1	$	366.6
Other long-term investments	$	323.2	$	50.3	$	(31.7	)	$	13.7	$	355.5

	December 31, 2019
(Millions)	Cost or amortized cost		Gross unrealized gains		Gross unrealized losses			Net foreign currency gains		Fair value
Equity securities	$	379.2	$	55.6	$	(37.3	)	$	7.7	$	405.2
Other long-term investments	$	315.4	$	49.9	$	(29.3	)	$	10.8	$	346.8

19

Sirius International Insurance Group, Ltd.

Notes to Consolidated Financial Statements

Unaudited

Equity securities at fair value consisted of the following as of March 31, 2020 and December 31, 2019:

(Millions)	March 31, 2020			December 31, 2019
Fixed income mutual funds	$	192.1		$	175.3
Common stocks	184.4			228.1
Other equity securities(1)	(9.9		)	1.8
Total Equity securities	$	366.6		$	405.2

⁽¹⁾Sirius Group engaged in short selling of certain equity securities for which settlement was pending as of March 31, 2020.

Other long-term investments at fair value consisted of the following as of March 31, 2020 and December 31, 2019:

(Millions)	March 31, 2020		December 31, 2019
Hedge funds and private equity funds	$	279.6	$	269.0
Limited liability companies and private equity securities	75.9		77.8
Total other long-term investments	$	355.5	$	346.8

Hedge Funds and Private Equity Funds

Sirius Group holds investments in hedge funds and private equity funds, which are included in other long-term investments. The fair value of these investments has been estimated using the net asset value of the funds. As of March 31, 2020, Sirius Group held investments in 9 hedge funds and 33 private equity funds. The largest investment in a single fund was $59.4 million as of March 31, 2020 and $51.6 million as of December 31, 2019.

The following table summarizes investments in hedge funds and private equity interests by investment objective and sector as of March 31, 2020 and December 31, 2019:

	March 31, 2020				December 31, 2019
(Millions)	Fair value		Unfunded commitments		Fair value		Unfunded commitments
Hedge funds:
Long/short multi-sector	$	49.5	$	—	$	53.0	$	—
Distressed mortgage credit	59.4		—		51.6		—
Private credit	21.8		—		21.5		—
Other	1.1		—		1.4		—
Total hedge funds	131.8		—		127.5		—
Private equity funds:
Energy infrastructure & services	51.5		34.1		53.6		34.6
Multi-sector	16.0		7.8		8.7		7.8
Healthcare	28.2		6.8		25.9		10.4
Life settlement	22.9		—		23.9		—
Manufacturing/Industrial	26.3		—		27.6		3.9
Private equity secondaries	0.6		0.8		0.6		0.8
Other	2.3		1.8		1.2		2.6
Total private equity funds	147.8		51.3		141.5		60.1
Total hedge and private equity funds included in Other long-term investments	$	279.6	$	51.3	$	269.0	$	60.1

20

Sirius International Insurance Group, Ltd.

Notes to Consolidated Financial Statements

Unaudited

Redemption of investments in certain hedge funds is subject to restrictions including lock-up periods where no redemptions or withdrawals are allowed, restrictions on redemption frequency, and advance notice periods for redemptions. Amounts requested for redemptions remain subject to market fluctuations until the redemption effective date, which generally falls at the end of the defined redemption period.

The following summarizes the March 31, 2020 fair value of hedge funds subject to restrictions on redemption frequency and advance notice period requirements for investments in active hedge funds:

	Notice Period
Redemption Frequency (Millions)	30-59 days notice		60-89 days notice		90-119 days notice		120+ days notice		Total
Monthly	$	—	$	33.5	$	—	$	—	$	33.5
Quarterly	0.6		—		—		—		0.6
Semi-annual	—		0.2		—		—		0.2
Annual	—		16.0		59.6		21.9		97.5
Total	$	0.6	$	49.7	$	59.6	$	21.9	$	131.8

Certain of the hedge fund and private equity fund investments in which Sirius Group is invested are no longer active and are in the process of disposing of their underlying investments. Distributions from such funds are remitted to investors as the fund's underlying investments are liquidated. As of March 31, 2020, no distributions were outstanding from these investments.

Investments in private equity funds are generally subject to a "lock-up" period during which investors may not request a redemption. Distributions prior to the expected termination date of the fund may be limited to dividends or proceeds arising from the liquidation of the fund's underlying investments. In addition, certain private equity funds provide an option to extend the lock-up period at either the sole discretion of the fund manager or upon agreement between the fund and the investors.

As of March 31, 2020, investments in private equity funds were subject to lock-up periods as follows:

(Millions)	1 - 3 years		3 – 5 years		5 – 10 years		Total
Private Equity Funds – expected lock up period remaining	$	9.1	$	2.1	$	136.6	$	147.8

Investments Held on Deposit or as Collateral

As of March 31, 2020 and December 31, 2019 investments of $971.1 million and $1,309.5 million, respectively, were held in trusts required to be maintained in relation to various reinsurance agreements. Sirius Group's reinsurance operations are required to maintain deposits with certain insurance regulatory agencies in order to maintain their insurance licenses. The fair value of such deposits that are included within total investments totaled $1,002.8 million and $1,315.5 million as of March 31, 2020 and December 31, 2019, respectively.

As of March 31, 2020, Sirius Group held $0.2 million of collateral in the form of short-term investments associated with Interest Rate Cap agreements. (See Note 12.)

Unsettled investment purchases and sales

As of March 31, 2020 and December 31, 2019 Sirius Group reported $53.0 million and $2.3 million, respectively, in Accounts payable on unsettled investment purchases.

As of March 31, 2020 and December 31, 2019, Sirius Group reported $35.2 million and $6.7 million, respectively, in Accounts receivable on unsettled investment sales.

21

Sirius International Insurance Group, Ltd.

Notes to Consolidated Financial Statements

Unaudited

Note 9. Fair value measurements

Fair value measurements are categorized into a hierarchy that distinguishes between inputs based on market data from independent sources ("observable inputs") and a reporting entity's internal assumptions based upon the best information available when external market data is limited or unavailable ("unobservable inputs"). Quoted prices in active markets for identical assets or liabilities have the highest priority ("Level 1"), followed by observable inputs other than quoted prices, including prices for similar but not identical assets or liabilities ("Level 2"), and unobservable inputs, including the reporting entity's estimates of the assumptions that market participants would use, having the lowest priority ("Level 3").

The availability of observable inputs can vary from financial instrument to financial instrument and is affected by a wide variety factors including, for example, the type of financial instrument, whether the financial instrument is new and not yet established in the marketplace, and other characteristics particular to the instrument. To the extent that valuation is based on models or inputs that are less observable or unobservable in the market, the determination of fair value requires significantly more judgment.

Accordingly, the degree of judgment exercised by management in determining fair value is greatest for instruments categorized in Level 3. In periods of market dislocation, the observability of prices and inputs may be reduced for many instruments. This may lead the Company to change the selection of the valuation technique (for example, from market to cash flow approach) or to use multiple valuation techniques to estimate the fair value of a financial instrument. These circumstances could cause an instrument to be reclassified between levels within the fair value hierarchy. Investments valued using Level 1 inputs include fixed maturity investments, primarily investments in U.S. Treasuries Bills and Notes, equity securities, and short-term investments. Investments valued using Level 2 inputs are primarily comprised of fixed maturity investments, which have been disaggregated into classes, including U.S. government and government agency, corporate debt securities, mortgage-backed and asset-backed securities, non-U.S. government and government agency, U.S. state and municipalities and political subdivision and preferred stocks. Investments valued using Level 2 inputs also include certain exchange-traded funds that track U.S. stock indices such as the S&P 500 but are traded on foreign exchanges. Fair value estimates for investments that trade infrequently and have few or no observable market prices are classified as Level 3 measurements. Sirius Group determines when transfers between levels have occurred as of the beginning of the period.

Valuation techniques

Sirius Group uses outside pricing services to assist in determining fair values for its investments. For investments in active markets, Sirius Group uses the quoted market prices provided by outside pricing services to determine fair value. The outside pricing services Sirius Group uses have indicated that they will only provide prices where observable inputs are available. In circumstances where quoted market prices are unavailable or are not considered reasonable, Sirius Group estimates the fair value using industry standard pricing models and observable inputs such as benchmark yields, reported trades, broker-dealer quotes, issuer spreads, benchmark securities, bids, offers, prepayment speeds, reference data including research publications, and other relevant inputs. Given that many fixed maturity investments do not trade on a daily basis, the outside pricing services evaluate a wide range of fixed maturity investments by regularly drawing parallels from recent trades and quotes of comparable securities with similar features. The characteristics used to identify comparable fixed maturity investments vary by asset type and take into account market convention.

The valuation process above is generally applicable to all of Sirius Group's fixed maturity investments. The techniques and inputs specific to asset classes within Sirius Group's fixed maturity investments for Level 2 securities that use observable inputs are as follows:

U.S. government and government agency

U.S. government and government agency securities consist primarily of debt securities issued by the U.S. Treasury and mortgage pass-through agencies such as the Federal National Mortgage Association, the Federal Home Loan Mortgage Corporation and the Government National Mortgage Association. Fixed maturity investments included in U.S. government and government agency securities are primarily priced by pricing services. When evaluating these securities, the pricing services gather information from market sources and integrate other observations from markets and sector news. Evaluations are updated by obtaining broker-dealer quotes and other market information including actual trade volumes, when available. The fair value of each security is individually computed using analytical models that incorporate option-adjusted spreads and other daily interest rate data.

22

Sirius International Insurance Group, Ltd.

Notes to Consolidated Financial Statements

Unaudited

Non-U.S. government and government agency

Non-U.S. government and government agency securities consist of debt securities issued by non-U.S. governments and their agencies along with supranational organizations (also known as sovereign debt securities). Securities held in these sectors are primarily priced by pricing services that employ proprietary discounted cash flow models to value the securities. Key quantitative inputs for these models are daily observed benchmark curves for treasury, swap, and high issuance credits. The pricing services then apply a credit spread for each security, which is developed by in-depth and real-time market analysis. For securities in which trade volume is low, the pricing services utilize data from more frequently traded securities with similar attributes. These models may also be supplemented by daily market and credit research for international markets.

Corporate debt securities

Corporate debt securities consist primarily of investment-grade debt of a wide variety of U.S. and non-U.S. corporate issuers and industries. The corporate fixed maturity investments are primarily priced by pricing services. When evaluating these securities, the pricing services gather information from market sources regarding the issuer of the security and obtain credit data, as well as other observations, from markets and sector news. Evaluations are updated by obtaining broker-dealer quotes and other market information including actual trade volumes, when available. The pricing services also consider the specific terms and conditions of the securities, including any specific features that may influence risk.

Mortgage-backed and asset-backed securities

The fair value of mortgage and asset-backed securities is primarily priced by pricing services using a pricing model that utilizes information from market sources and leveraging similar securities. Key inputs include benchmark yields, reported trades, underlying tranche cash flow data and collateral performance, plus new issue data, as well as broker-dealer quotes, issuer spreads, two-sided markets, benchmark securities, bids, offers, and reference data including issuer, vintage, loan type, collateral attributes, prepayment speeds, default rates, recovery rates, cash flow stress testing, credit quality ratings, and market research publications.

U.S. states, municipalities and political subdivisions

The U.S. states, municipalities and political subdivisions portfolio contains debt securities issued by U.S. domiciled state and municipal entities. These securities are generally priced by independent pricing services using the techniques described for U.S. government and government agency securities described above.

Preferred stocks

The fair value of preferred stocks is generally priced by independent pricing services using an evaluated pricing model that calculates the appropriate spread over a comparable security for each issue. Key inputs include exchange prices (underlying and common stock of the same issuer), benchmark yields, reported trades, broker-dealer quotes, issuer spreads, two-sided markets, benchmark securities, bids, offers, and reference data including sector, coupon, credit quality ratings, duration, credit enhancements, early redemption features, and market research publications.

Level 3 Investments

Level 3 valuations are generated from techniques that use assumptions not observable in the market. These unobservable assumptions reflect Sirius Group's assumptions about what market participants would use in valuing the investment. Generally, certain securities may start out as Level 3 when they are originally issued but, as observable inputs become available in the market, they may be reclassified to Level 2.

Sirius Group employs a number of procedures to assess the reasonableness of the fair value measurements for its other long-term investments, including obtaining and reviewing the audited annual financial statements of hedge funds and private equity funds and periodically discussing each fund's pricing with the fund manager. However, since the fund managers do not provide sufficient information to evaluate the pricing inputs and methods for each underlying investment, the inputs are considered to be unobservable.

23

Sirius International Insurance Group, Ltd.

Notes to Consolidated Financial Statements

Unaudited

The fair values of Sirius Group's investments in private equity securities and private debt instruments have been classified as Level 3 measurements. They are carried at fair value and are initially valued based on transaction price. Their valuation is subsequently estimated based on available evidence such as a market transaction in similar instruments and other financial information for the issuer.

Investments measured using Net Asset Value

The fair value of Sirius Group's investments in hedge funds and private equity funds has been determined using net asset value ("NAV"). The hedge fund's administrator provides quarterly updates of fair value in the form of Sirius Group's proportional interest in the underlying fund's NAV, which is deemed to approximate fair value, generally with a three month delay in valuation. The fair value of investment in hedge funds is measured using the NAV practical expedient and therefore has been not categorized within the fair value hierarchy. The private equity funds provide quarterly or semi-annual partnership capital statements with a three or six month delay which are used as a basis for valuation. These private equity investments vary in investment strategies and are not actively traded in any open markets. Due to a lag in reporting, some of the fund managers, fund administrators, or both, are unable to provide final fund valuations as of the Company's reporting date. In these circumstances, Sirius Group estimates the return of the current period and uses all credible information available. This includes utilizing preliminary estimates reported by its fund managers and using other information that is available to Sirius Group with respect to the underlying investments, as necessary.

24

Sirius International Insurance Group, Ltd.

Notes to Consolidated Financial Statements

Unaudited

Fair Value Measurements by Level

The following tables summarize Sirius Group's financial assets and liabilities measured at fair value as of March 31, 2020 and December 31, 2019 by level:

	March 31, 2020
(Millions)	Fair Value			Level 1 Inputs			Level 2 Inputs		Level 3 Inputs
Assets measured at fair value
Fixed maturity investments:
U.S. Government and government agency	$	128.2		$	127.1		$	1.1	$	—
Corporate debt securities	444.3			—			444.3		—
Residential mortgage-backed securities	471.9			—			471.9		—
Asset-backed securities	524.4			—			524.4		—
Commercial mortgage-backed securities	94.3			—			94.3		—
Non-U.S. government and government agency	60.8			29.7			31.1		—
Preferred stocks	6.5			—			3.9		2.6
U.S. States, municipalities, and political subdivision	1.7			—			1.7		—
Total fixed maturity investments	1,732.1			156.8			1,572.7		2.6
Equity securities:
Fixed income mutual funds	192.1			192.1			—		—
Common stocks	184.4			184.4			—		—
Other equity securities(1)	(9.9		)	(11.6		)	1.7		—
Total equity securities	366.6			364.9			1.7		—
Short-term investments	1,041.8			1,019.5			22.3		—
Other long-term investments(2)	75.9			—			—		75.9
Total investments	$	3,216.4		$	1,541.2		$	1,596.7	$	78.5
Loan participation	19.9			—			—		19.9
Derivative instruments	11.7			1.0			—		10.7
Total assets measured at fair value	$	3,248.0		$	1,542.2		$	1,596.7	$	109.1
Liabilities measured at fair value
Contingent consideration liabilities	$	28.3		$	—		$	—	$	28.3
Derivative instruments	20.4			0.8			—		19.6
Total liabilities measured at fair value	$	48.7		$	0.8		$	—	$	47.9

⁽¹⁾Sirius Group engaged in short selling of certain equity securities for which settlement was pending as of March 31, 2020.

⁽²⁾Excludes fair value of $279.6 associated with hedge funds and private equity funds which fair value is measured using NAV practical expedient.

25

Sirius International Insurance Group, Ltd.

Notes to Consolidated Financial Statements

Unaudited

	December 31, 2019
(Millions)	Fair value		Level 1 inputs		Level 2 inputs		Level 3 inputs
Assets measured at fair value
Fixed maturity investments:
U.S. Government and government agency	$	110.5	$	109.1	$	1.4	$	—
Corporate debt securities	474.1		—		474.1		—
Asset-backed securities	486.8		—		486.8		—
Residential mortgage-backed securities	438.9		—		438.9		—
Commercial mortgage-backed securities	89.0		—		89.0		—
Non-U.S. government and government agency	63.0		31.7		31.3		—
Preferred stocks	17.0		—		—		17.0
U.S. States, municipalities, and political subdivision	1.7		—		1.7		—
Total fixed maturity investments	1,681.0		140.8		1,523.2		17.0
Equity securities:
Fixed income mutual funds	175.3		175.3		—		—
Common stocks	228.1		228.1		—		—
Other equity securities	1.8		—		1.8		—
Total equity securities	405.2		403.4		1.8		—
Short-term investments	1,085.2		1,073.7		11.5		—
Other long-term investments(1)	77.8		—		—		77.8
Total investments	$	3,249.2	$	1,617.9	$	1,536.5	$	94.8
Loan participation	20.0		—		—		20.0
Derivative instruments	11.4		1.3		—		10.1
Total assets measured at fair value	$	3,280.6	$	1,619.2	$	1,536.5	$	124.9
Liabilities measured at fair value
Contingent consideration liabilities	$	28.2	$	—	$	—	$	28.2
Derivative instruments	9.5		0.2		—		9.3
Total liabilities measured at fair value	$	37.7	$	0.2	$	—	$	37.5

⁽¹⁾Excludes fair value of $269.0 associated with hedge funds and private equity funds which fair value is measured using NAV practical expedient.

26

Sirius International Insurance Group, Ltd.

Notes to Consolidated Financial Statements

Unaudited

Rollforward of Level 3 fair value measurements

The following tables present changes in Level 3 for financial instruments measured at fair value for the three months ended March 31, 2020 and March 31, 2019:

	For the three months ended March 31, 2020
(Millions)	Fixed Maturities			Other long-term investments(1)			Loan Participation			Derivative instruments assets & (liabilities)			Contingent consideration (liabilities)
Balance as of January 1, 2020	$	17.0		$	77.8		$	20.0		$	0.8		$	(28.2	)
Total realized and unrealized gains (losses)	2.6			(0.9		)	—			(13.3		)	(0.1		)
Foreign currency gains (losses) through Other Comprehensive Income	—			(1.0		)	—			—			—
Purchases	—			—			—			—			—
Sales/Settlements	(17.0		)	—			(0.1		)	3.6			—
Balance as of March 31, 2020	$	2.6		$	75.9		$	19.9		$	(8.9	)	$	(28.3	)

⁽¹⁾Excludes fair value of $279.6 associated with hedge funds and private equity funds which fair value is measured using NAV practical expedient.

	For the three months ended March 31, 2019
(Millions)	Fixed Maturities			Other long-term investments(1)			Loan Participation		Derivative instruments assets & (liabilities)			Contingent consideration (liabilities)
Balance as of January 1, 2019	$	5.4		$	63.6		$	—	$	(0.5	)	$	(28.8	)
Total realized and unrealized gains (losses)	—			9.3			—		(5.1		)	—
Foreign currency gains (losses) through Other Comprehensive Income	—			(0.7		)	—		—			—
Purchases	—			15.8			—		—			—
Sales/Settlements	(5.4		)	—			—		0.8			—
Balance as of March 31, 2019	$	—		$	88.0		$	—	$	(4.8	)	$	(28.8	)

⁽¹⁾Excludes fair value of $301.7 associated with hedge funds and private equity funds which fair value is measured using NAV practical expedient.

Fair value measurements – transfers between levels

There were no transfers between Level 3 and Level 2 measurements during the three months ended March 31, 2020 and 2019.

27

Sirius International Insurance Group, Ltd.

Notes to Consolidated Financial Statements

Unaudited

Significant Unobservable Inputs

The table below presents information about the significant unobservable inputs used for recurring fair value measurements for certain Level 3 instruments as of March 31, 2020 and December 31, 2019, and includes only those instruments for which information about the inputs is reasonably available to Sirius Group, such as data from independent third-party valuation service providers and from internal valuation models.

(Millions, except share prices)	March 31, 2020
Description	Valuation Technique(s)	Fair value			Unobservable input
Private equity securities(1)	Share price of recent transaction	$	32.5		Purchase share price	40.6
Loan participation(1)	Purchase price of recent transaction	$	19.9		Comparable yields	Range - 4.46% - 7.25% Median - 5.75%
Preferred stock(1)	Share price of recent transaction	$	17.5		Purchase price	7.74
Private equity securities(1)	Multiple of GAAP book value	$	13.3		Book value multiple	Range - 0.73x-0.91x Median - 0.82x
Private debt instrument(1)	Discounted cash flow	$	6.2		Discount yield	Range - 11.87% - 12.32% Median - 12.08%
Private equity securities(1)	Purchase price of recent transaction	$	5.1		Purchase price	7.74
Currency swaps(2)	Third party appraisal	$	2.4		Broker quote	$	2.4
Preferred stock(1)	Purchase price of recent transaction	$	1.9		Purchase price	$	1.9
Currency forwards(2)	Third party appraisal	$	1.7		Broker quote	$	1.7
Private equity securities(1)	Purchase price of recent transaction	$	1.0		Purchase price	$	10.0
Equity warrants(2)	Option pricing model	$	0.9		Strike price	$	0.2
Preferred stock(1)	Purchase price of recent transaction	$	0.7		Purchase price	$	0.70
Private equity securities(1)	Purchase price of recent transaction	$	0.3		Purchase price	$	0.3
Weather derivatives(2)	Third party appraisal	$	(13.9	)	Broker quote	$	(13.9	)
Contingent consideration	External valuation model	$	(28.3	)	Discounted future payments	$	(28.3	)

⁽¹⁾As of March 31, 2020, each asset type consists of one security.

⁽²⁾SeeNote 12for discussion of derivative instruments.

(Millions, except share prices)	December 31, 2019
Description	Valuation Technique(s)	Fair value			Unobservable input
Private equity securities(1)	Share price of recent transaction	$	32.5		Purchase share price	$	40.6
Loan participation(1)	Purchase price of recent transaction	$	20.0		Purchase price	20.0
Preferred stock(1)	Share price of recent transaction	$	17.5		Purchase price	$	7.74
Private equity securities(1)	Multiple of GAAP book value	$	14.2		Book value multiple	0.9
Preferred stock(1)	Purchase price of recent transaction	$	12.2		Purchase price	$	12.2
Private debt instrument(1)	Purchase price of recent transaction	$	7.2		Purchase price	$	9.0
Weather derivatives(2)	Third party appraisal	$	7.0		Broker quote	$	7.0
Private equity security(1)	Purchase price of recent transaction	$	5.1		Purchase price	$	7.74
Preferred stock(1)	Purchase price of recent transaction	$	4.8		Purchase price	$	4.80
Currency forwards(2)	Third party appraisal	$	2.7		Broker quote	$	2.7
Private equity securities(1)	Purchase price of recent transaction	$	1.0		Purchase price	$	10.0
Equity warrants(2)	Option pricing model	$	0.4		Strike price	$	0.2
Private equity securities(1)	Purchase price of recent transaction	$	0.3		Purchase price	$	0.3
Currency swaps(2)	Third party appraisal	$	(3.6	)	Broker quote	$	(3.6	)
Currency forwards(2)	Third party appraisal	$	(5.7	)	Broker quote	$	(5.7	)
Contingent consideration	External valuation model	$	(28.2	)	Discounted future payments	$	(28.2	)

⁽¹⁾As of December 31, 2019, each asset type consists of one security.

⁽²⁾SeeNote 12for discussion of derivative instruments.

28

Sirius International Insurance Group, Ltd.

Notes to Consolidated Financial Statements

Unaudited

Financial instruments disclosed, but not carried at fair value

Sirius Group uses various financial instruments in the normal course of its business. The carrying values of Cash, Accrued investment income, certain other assets, Accounts payable on unsettled investment purchases, certain other liabilities, and other financial instruments not included in the table below approximated their fair values at March 31, 2020 and December 31, 2019, due to their respective short maturities. As these financial instruments are not actively traded, their respective fair values are classified within Level 3. The following table includes financial instruments for which the carrying value differs from the estimated fair values at March 31, 2020 and December 31, 2019:

	March 31, 2020				December 31, 2019
(Millions)	Fair Value(1)		Carrying Value		Fair Value(1)		Carrying Value
Liabilities, Mezzanine equity, and Non-controlling interest:
2017 SEK Subordinated Notes	$	268.3	$	270.6	$	294.5	$	291.2
2016 SIG Senior Notes	$	394.9	$	394.2	$	394.5	$	394.0
Series B preference shares	$	171.4	$	205.0	$	186.4	$	223.0

⁽¹⁾Fair value estimated by internal pricing and considered a Level 3 measurement.

Note 10. Debt and standby letters of credit facilities

Sirius Group's debt outstanding as of March 31, 2020 and December 31, 2019 consisted of the following:

(Millions)	March 31, 2020			Effective Rate(1)		December 31, 2019			Effective Rate(1)
2017 SEK Subordinated Notes, at face value	$	274.2		4.2	%	$	295.0		4.0	%
Unamortized issuance costs	(3.6		)			(3.8		)
2017 SEK Subordinated Notes, carrying value	270.6					291.2
2016 SIG Senior Notes, at face value	400.0			4.7	%	400.0			4.7	%
Unamortized discount	(2.2		)			(2.3		)
Unamortized issuance costs	(3.6		)			(3.7		)
2016 SIG Senior Notes, carrying value	394.2					394.0
Total debt	$	664.8				$	685.2

⁽¹⁾ Effective rate considers the effect of the debt issuance costs.

2017 SEK Subordinated Notes

On September 22, 2017, Sirius Group issued floating rate callable subordinated notes denominated in Swedish kronor ("SEK") in the amount of SEK 2,750.0 million (or $346.1 million on date of issuance) at a 100% issue price ("2017 SEK Subordinated Notes"). The 2017 SEK Subordinated Notes were issued in an offering that was exempt from the registration requirements of the Securities Act of 1933 (the "Securities Act"). The 2017 SEK Subordinated Notes bear interest on their principal amount at a floating rate equal to the applicable Stockholm Interbank Offered Rate ("STIBOR") for the relevant interest period plus an applicable margin, payable quarterly in arrears on March 22, June 22, September 22, and December 22 in each year commencing on December 22, 2017, until maturity in September 2047.

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Sirius International Insurance Group, Ltd.

Notes to Consolidated Financial Statements

Unaudited

Beginning on September 22, 2022, the 2017 SEK Subordinated Notes may be redeemed, in whole or in part, at Sirius Group's option. In addition, within 90 days following the occurrence of a Specified Event (as defined below), the 2017 SEK Subordinated Notes may be redeemed, in whole but not in part, at Sirius Group's option. "Specified Event" means (a) an "Additional Amounts Event" in connection with a change in laws, rules or regulations as a result of which Sirius Group is obligated to pay additional amounts on the notes in respect of any withholding or deduction for taxes, (b) a "Tax Event" in connection with a change in laws, rules or regulations as a result of which interest on the notes is no longer fully deductible by Sirius Group for income tax purposes in the applicable jurisdiction (to the extent that such interest was so deductible as of the time of such Tax Event), (c) a "Rating Methodology Event" in connection with a change in, or clarification to, the rating methodology of Standard & Poor's or Fitch that results in a materially unfavorable capital treatment of the notes, or (d) a "Regulatory Event" in connection with a change in, or clarification to, applicable supervisory regulations that results in the notes no longer qualifying as Tier 2 Capital.

Sirius Group incurred $4.6 million in expenses related to the issuance of the 2017 SEK Subordinated Notes (including SEK 27.5 million, or $3.5 million, in underwriting fees), which have been deferred and are being recognized into interest expense over the life of the 2017 SEK Subordinated Notes. For the three months ended March 31, 2020 and 2019, Sirius Group recognized $20.6 million and $11.0 million, respectively, of foreign currency exchange gains on the remeasurement of the 2017 SEK Subordinated Notes into USD from SEK.

Taking into effect the amortization of all underwriting and issuance expenses, and applicable STIBOR, the 2017 SEK Subordinated Notes yielded an effective rate of approximately 4.2% and 3.7% annualized for the three months ended March 31, 2020 and 2019, respectively. Sirius Group recorded $3.0 million and $2.8 million of interest expense, inclusive of amortization of issuance costs on the 2017 SEK Subordinated Notes for the three months ended March 31, 2020 and 2019, respectively.

2016 SIG Senior Notes

On November 1, 2016, Sirius Group issued $400.0 million face value of senior unsecured notes ("2016 SIG Senior Notes") at an issue price of 99.209% for net proceeds of $392.4 million after taking into effect both deferrable and non-deferrable issuance costs. The 2016 SIG Senior Notes were issued in an offering that was exempt from the registration requirements of the Securities Act. The 2016 SIG Senior Notes bear an annual interest rate of 4.6%, payable semi-annually in arrears on May 1, and November 1, in each year commencing on May 1, 2017, until maturity in November 2026.

Sirius Group incurred $5.1 million in expenses related to the issuance of the 2016 SIG Senior Notes (including $3.4 million in underwriting fees), which have been deferred and are being recognized into interest expense over the life of the 2016 SIG Senior Notes.

Taking into effect the amortization of the original issue discount and all underwriting and issuance expenses, the 2016 SIG Senior Notes yield an effective rate of approximately 4.7% per annum. Sirius Group recorded $4.8 million, inclusive of amortization of issuance costs on the 2016 SIG Senior Notes, for both three month periods ended March 31, 2020 and 2019.

Standby Letter of Credit Facilities

On November 9, 2019, Sirius International Insurance Corporation ("Sirius International"), a wholly owned subsidiary of the Company, renewed two standby letter of credit facility agreements totaling $125 million to provide capital support for Lloyd's Syndicate 1945. The first letter of credit is a renewal of a $90 million facility with Nordea Bank Finland Abp, London Branch, which is issued on an unsecured basis. The second letter of credit is a $35 million facility with DNB Bank ASA, Sweden Branch, $25 million of which is issued on an unsecured basis. Each facility is renewable annually. The above referenced facilities are subject to various affirmative, negative and financial covenants that the Company considers to be customary for such borrowings, including certain minimum net worth and maximum debt to capitalization standards.

Sirius International has other secured letter of credit and trust arrangements with various financial institutions to support its insurance operations. As of March 31, 2020 and December 31, 2019, these secured letter of credit and trust arrangements were collateralized by pledged assets and assets in trust of SEK 3.4 billion and SEK 3.4 billion, respectively, or $335.6 million and $363.3 million, respectively (based on the March 31, 2020 and December 31, 2019 SEK to USD exchange rates). As of March 31, 2020 and December 31, 2019, Sirius America Insurance Company's trust arrangements were collateralized by pledged assets and assets in trust of $47.8 million and $57.7 million, respectively. As of March 31, 2020 and December 31, 2019, Sirius Bermuda's trust arrangements were collateralized by pledged assets and assets in trust of $513.8 million and $784.0 million, respectively.

30

Sirius International Insurance Group, Ltd.

Notes to Consolidated Financial Statements

Unaudited

Revolving Credit Facility

In February 2018, Sirius Group, through its indirectly wholly-owned subsidiary Sirius International Group, Ltd. entered into a three-year, $300 million senior unsecured revolving credit facility (the "Facility"). The Facility provides access to loans for working capital and general corporate purposes, and letters of credit to support obligations under insurance and reinsurance agreements and retrocessional agreements. The Facility is subject to various affirmative, negative and financial covenants that Sirius Group considers to be customary for such borrowings, including certain minimum net worth, maximum debt to capitalization, financial strength rating standards, and change in control provisions. As of March 31, 2020, there were no outstanding borrowings under the Facility.

Debt and Standby Letter of Credit Facility Covenants

As of March 31, 2020, Sirius Group was in compliance with all of the covenants under the 2017 SEK Subordinated Notes, the 2016 SIG Senior Notes, the Nordea Bank Finland Abp, London Branch facility, and the DNB Bank ASA, Sweden Branch facility. In addition, as of March 31, 2020, Sirius Group was in compliance with all of the covenants under the Facility.

Interest

Total interest expense incurred by Sirius Group for its indebtedness for the three months ended March 31, 2020 and 2019 was $7.8 million and $7.6 million, respectively. Total interest paid by Sirius Group for its indebtedness for the three months ended March 31, 2020 and 2019 was $2.8 million and $2.7 million, respectively.

Note 11. Income taxes

The Company and its Bermuda-domiciled subsidiaries are not subject to Bermuda income tax under current Bermuda law. In the event there is a change in the current law such that taxes are imposed, the Company and its Bermuda-domiciled subsidiaries would be exempt from such tax until March 31, 2035, pursuant to the Bermuda Exempted Undertakings Tax Protection Act of 1966. The Company has subsidiaries and branches that operate in various other jurisdictions around the world that are subject to tax in the jurisdictions in which they operate. The jurisdictions in which the Company's subsidiaries and branches are subject to tax are Australia, Belgium, Canada, Denmark, Germany, Gibraltar, Hong Kong (China), Ireland, Luxembourg, Malaysia, Shanghai (China), Singapore, Spain, Sweden, Switzerland, the United Kingdom, and the United States.

Sirius Group reported an income tax expense (benefit) of $(14.8) million and $17.2 million during the three months ended March 31, 2020 and 2019, respectively, on pre-tax income (loss) of $(136.1) million and $121.3 million, respectively. The effective tax rate for the three months ended March 31, 2020 was 10.9%, which was lower than the Swedish statutory rate of 21.4% (the rate at which the majority of Sirius Group's worldwide operations are taxed) primarily because of valuation allowance recorded against certain deferred tax assets and jurisdictions with pretax losses for which no tax benefit can be recognized. The effective tax rate for the three months ended March 31, 2019 was 14.2%, which was lower than the Swedish statutory rate of 21.4% (the rate at which the majority of Sirius Group's worldwide operations are taxed) primarily because of income recognized in jurisdictions with lower rates than Sweden. In arriving at the effective tax rate for the three months ended March 31, 2020 and 2019, Sirius Group forecasted all income and expense items including the change in unrealized investment gains (losses) and realized investment gains (losses) for the years ending December 31, 2020 and 2019.

The Tax Cuts and Jobs Act ("TCJA") includes a new Base Erosion and Anti-Abuse Minimum Tax ("BEAT") provision, which is essentially a minimum tax that is potentially applicable to certain otherwise deductible payments made by U.S. entities to non-U.S. affiliates, including cross-border interest payments and reinsurance premiums. The statutory BEAT rate is 10% in 2019-2025, and then rises to 12.5% in 2026 and thereafter. The TCJA also includes provisions for Global Intangible Low-Taxed Income ("GILTI") under which taxes on foreign income are imposed on the excess of a deemed return on tangible assets of certain foreign subsidiaries. Consistent with accounting guidance, Sirius Group will treat BEAT as an in period tax charge when incurred in future periods for which no deferred taxes need to be provided and has made an accounting policy election to treat GILTI taxes in a similar manner. No provision for income taxes related to BEAT or GILTI was recorded as of March 31, 2020 and December 31, 2019.

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Sirius International Insurance Group, Ltd.

Notes to Consolidated Financial Statements

Unaudited

Sirius Group has capital and liquidity in many of its subsidiaries, some of which may reflect undistributed earnings. If such capital or liquidity were to be paid or distributed to the Company or Sirius Group's subsidiaries, as dividends or otherwise, they may be subject to income or withholding taxes. Sirius Group generally intends to operate, and manage its capital and liquidity, in a tax-efficient manner. However, the applicable tax laws in relevant countries are still evolving, including in response to guidance from the Organisation for Economic Cooperation and Development. Accordingly, such payments or earnings may be subject to income or withholding tax in jurisdictions where they are not currently taxed or at higher rates of tax than currently taxed, and the applicable tax authorities could attempt to apply income or withholding tax to past earnings or payments.

In April 2020, the European Court of Justice (the “ECJ”) published a decision disallowing the eligibility of an unrelated Gibraltar company for a European Union directive providing relief from withholding taxes on cross-border dividends. More generally, as a result of Brexit, it is projected that Gibraltar companies will cease to be eligible for European Union tax directives from January 1, 2021. The Company has a subsidiary organized in Gibraltar which has been a party to cross-border transactions with affiliates. Accordingly, the Company is currently evaluating the potential tax consequences of both the ECJ decision and Brexit to legacy and future transactions involving this Gibraltar subsidiary, and is assessing whether these developments could materially impact the Company’s provision for income taxes.

Deferred tax asset, net of valuation allowance

Sirius Group's net deferred tax liability, net of the valuation allowance as of March 31, 2020 is $12.5 million. Of the $12.5 million, $27.0 million relates to net deferred tax assets in U.S. subsidiaries, $133.0 million relates to net deferred tax assets in Luxembourg subsidiaries, $182.7 million relates to net deferred tax liabilities in Sweden subsidiaries, and $10.2 million relates to other net deferred tax asset.

Sirius Group records a valuation allowance against deferred tax assets if it becomes more likely than not that all or a portion of a deferred tax asset will not be realized. Changes in valuation allowances from period to period are included in income tax expense in the period of change. In determining whether or not a valuation allowance, or change therein, is warranted, Sirius Group considers factors such as prior earnings history, expected future earnings, carryback and carryforward periods and strategies that if executed would result in the realization of a deferred tax asset. It is possible that certain planning strategies or projected earnings in certain subsidiaries may not be feasible to utilize the entire deferred tax asset, which could result in material changes to Sirius Group's deferred tax assets and tax expense.

Uncertain tax positions

Recognition of the benefit of a given tax position is based upon whether a company determines that it is more likely than not that a tax position will be sustained upon examination based upon the technical merits of the position. In evaluating the more likely than not recognition threshold, Sirius Group must presume that the tax position will be subject to examination by a taxing authority with full knowledge of all relevant information. If the recognition threshold is met, then the tax position is measured at the largest amount of benefit that is more than 50% likely of being realized upon ultimate settlement.

As of March 31, 2020, the total reserve for unrecognized tax benefits is $42.8 million. If Sirius Group determines in the future that its reserves for unrecognized tax benefits on permanent differences and interest and penalties are not needed, the reversal of $42.6 million of such reserves as of March 31, 2020 would be recorded as an income tax benefit and would impact the effective tax rate. If Sirius Group determines in the future that its reserves for unrecognized tax benefits on temporary differences are not needed, the reversal of $0.2 million of such reserves as of March 31, 2020 would not impact the effective tax rate due to deferred tax accounting but would accelerate the payment of cash to the taxing authority. Most of Sirius Group's reserves for unrecognized tax benefits on permanent differences relate to interest deductions denied by the Swedish Tax Authority ("STA"), as described further below.

The STA has denied deductions claimed by two of the Company's Swedish subsidiaries in certain tax years for interest paid on intra-group debt instruments. Sirius Group has challenged the STA's denial in court based on the technical merits. In October 2018, one of the Swedish subsidiaries received an adverse decision from Sweden's Administrative Court, which Sirius Group has appealed. Sirius Group has taken into account this and other relevant developments in applicable Swedish tax law and has established a reserve for this uncertain tax position. As of March 31, 2020, the total amount of such reserve was $42.0 million.

32

Sirius International Insurance Group, Ltd.

Notes to Consolidated Financial Statements

Unaudited

In connection with this matter, Sirius Group has also taken into account the Stock Purchase Agreement ("SPA") by which Sirius Group was sold to CMIG International Holding Pte. Ltd ("CMIG International") in 2016 and has recorded an indemnification asset. Pursuant to the SPA, the seller agreed to indemnify the buyer and Sirius Group for, among other things, (1) any additional tax liability in excess of Sirius Group's accounting for uncertain tax positions for tax periods prior to the sale of Sirius Group to CMIG International, and (2) an impairment in Sirius Group's net deferred tax assets resulting from a final determination by a tax authority. While Sirius Group intends to continue challenging the STA's denial based on the technical merits (including appealing the adverse court decision received in October 2018), the ultimate resolution of these tax disputes is uncertain and no assurance can be given that there will be no material changes to Sirius Group's operating results or balance sheet in connection with these uncertain tax positions or the related indemnification.

With few exceptions, Sirius Group is no longer subject to U.S. federal, state or non-U.S. income tax examinations by tax authorities for years before 2015.

Note 12. Derivatives

Interest Rate Cap

Sirius Group entered into an interest rate swap ("Interest Rate Cap") with two financial institutions where it paid an upfront premium and in return receives a series of quarterly payments based on the 3-month London Interbank Offered Rate at the time of payment. The Interest Rate Cap does not qualify for hedge accounting. Changes in fair value are recognized as unrealized gains or losses and are presented within Other revenue. The fair value of the interest rate cap has been estimated using a single broker quote and, accordingly, has been classified as a Level 3 measurement as of March 31, 2020 and December 31, 2019. Collateral held is recorded within short-term investments with an equal amount recognized as a liability to return collateral. Sirius Group's liability to return that collateral is based on the amounts provided by the counterparties and investment earnings thereon. As at March 31, 2020 and December 31, 2019, Sirius Group held collateral balances of $0.2 million at the end of each period.

Foreign Currency Risk Derivatives

Sirius Group executes foreign currency forwards, swaps, and futures to manage foreign currency exposure. The foreign currency risk derivatives are not designated or accounted for under hedge accounting. Changes in fair value are recognized as unrealized gains or losses and are presented within Net foreign exchange gains. The fair value of the swaps and forwards are estimated using a single broker quote and accordingly, classified as a Level 3 measurement. The fair value of the futures is widely available and have quoted prices in active markets and accordingly, were classified as a Level 1 measurement. Sirius Group did not provide or hold any collateral associated with the foreign currency risk derivatives.

Weather Derivatives

Sirius Group holds assets and assumes liabilities related to weather and weather contingent risk management products. Weather and weather contingent derivative contracts are entered into with the objective of generating profits in normal climatic conditions. Accordingly, Sirius Group's weather and weather contingent derivatives are not designed to meet the criteria for hedge accounting under GAAP. Sirius Group receives payment of premium at the contract inception in exchange for bearing the risk of variations in a quantifiable weather index. Changes in fair value are recognized as unrealized gains or losses and are presented within Other revenue. The fair value of the weather derivatives was estimated using a broker quote. Because of the significance of the unobservable inputs used to estimate the fair value of Sirius Group's weather risk contracts, the fair value measurements of the contracts are deemed to be Level 3 measurements in the fair value hierarchy as of March 31, 2020 and December 31, 2019. Sirius Group does not provide or hold any collateral associated with the weather derivatives.

Equity Contracts

Sirius Group executes trades in equity futures contracts, call options, and put options to hedge against positions in Common equities. The equity contracts are not designated or accounted for under hedge accounting. Changes in fair value are presented within Net unrealized investment (losses) gains. The fair value of the equity contracts is widely available and have quoted prices in active markets and accordingly, were classified as a Level 1 measurement.

33

Sirius International Insurance Group, Ltd.

Notes to Consolidated Financial Statements

Unaudited

Equity Warrants

Sirius Group holds restricted equity warrants as part of its investment strategy. The equity warrants are not designated or accounted for under hedge accounting. Changes in fair value are presented within Net unrealized investment (losses) gains. The fair value of the equity warrants is estimated using a single broker quote and accordingly, classified as a Level 3 measurement. Sirius Group did not provide or hold any collateral associated with the equity warrants.

The following tables summarize information on the classification and amount of the fair value of derivatives not designated as hedging instruments within the Company's Consolidated Balance Sheets as at March 31, 2020 and December 31, 2019:

(Millions)	March 31, 2020						December 31, 2019
Derivatives not designated as hedging instruments	Notional Value		Asset derivative at fair value(1)		Liability derivative at fair value(2)		Notional Value			Asset derivative at fair value(1)		Liability derivative at fair value(2)
Interest rate cap	$	250.0	$	—	$	—	$	250.0		$	—	$	—
Foreign currency swaps	$	90.0	$	2.4	$	—	$	90.0		$	—	$	3.6
Foreign currency forwards	$	215.2	$	7.3	$	5.7	$	(30.0	)	$	2.7	$	5.7
Weather derivatives	$	105.9	$	—	$	13.9	$	110.7		$	7.0	$	—
Equity futures contracts	$	20.1	$	—	$	—	$	34.5		$	—	$	—
Equity call options	$	1.9	$	0.1	$	—	$	—		$	—	$	—
Equity put options	$	11.4	$	1.0	$	0.8	$	31.0		$	1.3	$	0.2
Equity warrants	$	0.9	$	0.9	$	—	$	0.4		$	0.4	$	—

⁽¹⁾Asset derivatives are classified within Other assets within the Company's Consolidated Balance Sheets at March 31, 2020 and December 31, 2019.

⁽²⁾Liability derivatives are classified within Other liabilities within the Company's Consolidated Balance Sheets at March 31, 2020 and December 31, 2019.

The following table summarizes information on the classification and net impact on earnings, recognized in the Company's Consolidated Statements of Income relating to derivatives during the three months ended March 31, 2020 and 2019:

(Millions)		For the three months ended March 31,
Derivatives not designated as hedging instruments	Classification of gains (losses) recognized in earnings	2020			2019
Interest rate cap	Other revenues	$	—		$	(0.1	)
Foreign currency swaps	Net foreign exchange gains	$	6.0		$	0.8
Foreign currency forwards	Net foreign exchange gains	$	0.5		$	0.2
Weather derivatives	Other revenues	$	(20.4	)	$	(6.0	)
Equity futures contracts	Net realized investment gains (losses)	$	2.9		$	(0.6	)
Equity futures contracts	Net unrealized investment gains	$	(1.0	)	$	(0.2	)
Equity put options	Net realized investment gains (losses)	$	5.5		$	—
Equity put options	Net unrealized investment gains	$	0.5		$	(0.4	)
Equity warrants	Net unrealized investment gains	$	0.5		$	—

Note 13. Share-based compensation

Sirius Group's compensation plans include grants for various types of share-based and non-share-based compensation awards to key employees and directors of Sirius Group. As of March 31, 2020, Sirius Group's share-based compensation awards consist of performance shares units ("PSUs"), restricted share units ("RSUs"), restricted stock and options.

34

Sirius International Insurance Group, Ltd.

Notes to Consolidated Financial Statements

Unaudited

Sirius Group recognized $1.2 million and $0.2 million of compensation expense under the share-based awards during the three months ended March 31, 2020 and 2019, respectively. Sirius Group paid $0.3 million and $3.3 million to employees for share-based awards during the three months ended March 31, 2020 and 2019, respectively.

The following tables present unrecognized compensation cost associated with unvested awards and weighted average period over which it is expected to be recognized:

(Millions)	March 31, 2020
	PSUs - IPO Incentive Awards		PSUs - 2019 Long Term Incentive (LTI)		RSUs		Stock Options		2018 Long Term Incentive Plan (LTIP)
Unrecognized compensation cost related to unvested awards	$	2.6	$	1.1	$	9.8	$	1.8	$	0.2
Weighted average recognition period (years)	1.8 years		1.8 years		1.7 years		1.9 years		0.8 years

As of March 31, 2019, there were $34.3 million of unrecognized share-based compensation costs, which are expected to be recognized over two to three years.

The following table summarizes outstanding share-settled awards as of March 31, 2020:

As of and for the quarter ended March 31, 2020	Number of Shares
	PSUs - IPO Incentive Awards	PSUs - 2019 LTI	RSUs	Stock Options	2018 Long Term Incentive Plan (LTIP)
Unvested, beginning of period	555,163	391,136	1,353,852	1,374,945	870,471
Granted	—	—	—	—	—
Vested	—	—	—	—	—
Forfeited	11,967	8,809	33,015	—	14,372
Unvested, end of period	543,196	382,327	1,320,837	1,374,945	856,099

For the three months ended March 31, 2019, Sirius Group granted employees 401,311 PSUs, 1,411,714 RSUs, and 1,374,945 stock options.

Cash-Settled Awards

From time to time, the Company may issue cash-settled awards to its employees. In February 2020, Sirius Group awarded long-term incentive compensation to certain employees of the Company in the form of three-year, cliff-vested, phantom performance shares and phantom restricted shares that are payable in cash. Phantom performance shares compound through the end of the three-year award period based on the performance metrics during the period. The performance goals were determined by the Compensation Committee of the Board of Directors upon granting of awards. During the three months ended March 31, 2020, the Company recognized an expense of $1.6 million related to this award.

In addition, Sirius Group issued retention awards to certain key employees of the Company that vest and are paid in equal proportions on or prior to March 15, 2020 and on or prior to March 15, 2021, subject to continued employment on the applicable vesting date. In total the retention awards issued under this retention program were $13.8 million, of which, $6.9 million was paid on March 15, 2020. During the three months ended March 31, 2020, the Company recognized an expense of $6.3 million in General and administrative expenses.

35

Sirius International Insurance Group, Ltd.

Notes to Consolidated Financial Statements

Unaudited

Note 14. Common shareholder's equity, mezzanine equity, and non-controlling interests

Common shareholder's equity

The authorized share capital of the Company consists of 500,000,000 Common shares, $0.01 par value per share, and 100,000,000 Preference shares, $0.01 par value per share.

The following table presents changes in the Company's issued and outstanding Common shares as of March 31, 2020 and 2019, respectively:

	Three months ended March 31,
(Millions)	2020	2019
Common shares:
Shares issued and outstanding, beginning of period	115,299,341	115,151,251
Issuance of shares to directors and employees	—	111,052
Shares issued and outstanding, end of period	115,299,341	115,262,303

Dividends

The Company did not pay dividends to common shareholders during the three months ended March 31, 2020 and 2019.

Mezzanine equity

Series B Preference Shares

Sirius Group has issued 11,901,670 of the 15,000,000 designated Series B preference shares, with a par value of $0.01 per share.

The Series B preference shares rank senior to common shares with respect to dividend rights, rights of liquidation, winding-up, or dissolution of the Company and junior to all of the Company's existing and future policyholder obligations and debt obligations. Without the consent of the holders of the Series B preference shares, the Company may not issue any class or series of shares that rank senior or pari passu with the Series B preference shares as to the payment of dividends or as to distribution of assets upon any voluntary or involuntary liquidation, winding-up or dissolution of the Company, if the aggregate gross proceeds from the issuance of all such senior or pari passu shares equals or exceeds $100 million.

The Company adjusts the carrying value of the Series B preference shares to equal the redemption value at the end of each reporting period. At March 31, 2020 and December 31, 2019, the balance of the Series B preference shares was $199.6 million and $223.0 million, respectively.

Non-controlling interests

Non-controlling interests consist of the ownership interests of non-controlling shareholders in consolidated entities and are presented separately on the balance sheet. At March 31, 2020 and December 31, 2019, Sirius Group's balance sheet included $2.6 million and $2.4 million, respectively, in non-controlling interests.

The following tables show the change in non-controlling interest for the three months ended March 31, 2020 and 2019:

(Millions)	For the three months ended March 31, 2020		For the three months ended March 31, 2019
Non-controlling interests, beginning of the period	$	2.4	$	1.7
Net income attributable to non-controlling interests	0.2		0.4
Other, net	—		0.1
Non-controlling interests, end of the period	$	2.6	$	2.2

36

Sirius International Insurance Group, Ltd.

Notes to Consolidated Financial Statements

Unaudited

Alstead Re

As of March 31, 2020 and December 31, 2019, Sirius Group recorded non-controlling interest of $2.5 million and $2.3 million, respectively, in Alstead Re Insurance Company ("Alstead Re"). (See Note 17.)

Note 15. Earnings per share

Basic earnings per share is computed by dividing net income available to Sirius Group common shareholders by the weighted-average number of common shares outstanding during the period. Diluted earnings per share is computed by dividing net income (loss) available to Sirius Group common shareholders on a diluted basis by the weighted-average number of common shares outstanding adjusted to give effect to potentially dilutive securities.

The Series B preference shares qualify as participating securities, which requires the application of the two-class method to compute both basic and diluted earnings per share. The two-class method is an earnings allocation formula that treats participating securities as having rights to earnings that would otherwise have been available to common shareholders. The Series B preference shares have no obligation to absorb losses of the Company in periods of net loss.

The following table sets forth the computation of basic and diluted earnings per common share for the three months ended March 31, 2020 and 2019:

	For the three months ended March 31,
(Millions, except share and per share information)	2020			2019
Basic earnings per share
Numerator:
Net income	$	(121.3	)	$	104.1
Less: Income attributable to non-controlling interests	(0.2		)	(0.4		)
Less: Change in carrying value of Series B preference shares	23.4			(8.4		)
Net income available for dividends out of undistributed earnings	$	(98.1	)	$	95.3
Less: Earnings attributable to Series B preference shares	—			(8.9		)
Net income available to Sirius Group common shareholders	$	(98.1	)	$	86.4
Denominator:
Weighted average shares outstanding for basic earnings per share	115,262,302			115,182,331
Basic earnings per share	$	(0.85	)	$	0.75
Diluted earnings per share
Numerator:
Net income available to Sirius Group common shareholders	$	(98.1	)	$	86.4
Add: Change in carrying value of Series B preference shares	(23.4		)	8.4
Net income available to Sirius Group common shareholders on a diluted basis	$	(121.5	)	$	94.8
Denominator:
Weighted average shares outstanding for basic earnings per share	115,262,302			115,182,331
Add: Series B preference shares	11,901,670			11,901,670
Add: Unvested performance share units and restricted share units	—			251,313
Weighted average shares outstanding for diluted earnings per share(1)	127,163,972			127,335,314
Diluted earnings per share	$	(0.96	)	$	0.74

⁽¹⁾For the three months ended March 31, 2020, there were a total of 15,972,398 potentially dilutive securities excluded from the calculation of Diluted earnings per share. For the three months ended March 31, 2019, there were 19,510,830 potentially dilutive securities excluded from the calculation of Diluted earnings per share.

37

Sirius International Insurance Group, Ltd.

Notes to Consolidated Financial Statements

Unaudited

Note 16. Investments in unconsolidated entities

Sirius Group's investments in unconsolidated entities are included within Other long-term investments and consist of investments in common equity securities or similar instruments, which give Sirius Group the ability to exert significant influence over the investee's operating and financial policies ("equity method eligible unconsolidated entities"). Such investments may be accounted for under either the equity method or, alternatively, Sirius Group may elect to account for them under the fair value option.

The following table presents the components of Other long-term investments as of March 31, 2020 and December 31, 2019:

(Millions)	March 31, 2020		December 31, 2019
Equity method eligible unconsolidated entities, at fair value	$	151.8	$	151.9
Other unconsolidated investments, at fair value(1)	203.7		194.9
Total Other long-term investments(2)	$	355.5	$	346.8

⁽¹⁾Includes Other long-term investments that are not equity method eligible.

⁽²⁾There were no investments accounted for using the equity method as of March 31, 2020 and December 31, 2019.

Equity method eligible unconsolidated entities, at fair value

Sirius Group has elected the fair value option to account for its equity method eligible investments accounted for as part of Other long-term investments for consistency of presentation with the rest of its investment portfolio. The following table presents Sirius Group's investments in equity method eligible unconsolidated entities as of March 31, 2020 and December 31, 2019:

	Ownership interest as of
Investee	March 31, 2020		December 31, 2019		Instrument Held
BE Reinsurance Limited	24.9	%	24.9	%	Common shares
BioVentures Investors (Offshore) IV LP	73.0	%	73.0	%	Units
Camden Partners Strategic Fund V (Cayman), LP	39.4	%	39.4	%	Units
Diamond LS I LP	16.0	%	16.0	%	Units
Gateway Fund LP	19.3	%	15.0	%	Units
Monarch	12.8	%	12.8	%	Units
New Energy Capital Infrastructure Credit Fund LP	30.5	%	30.5	%	Units
New Energy Capital Infrastructure Offshore Credit Fund LP	30.5	%	30.5	%	Units
Pie Preferred Stock(1)	30.1	%	30.1	%	Preferred shares
Pie Series B Preferred Stock(1)	22.4	%	22.4	%	Preferred shares
Quintana Energy Partners	21.8	%	21.8	%	Units
Tuckerman Capital V LP	48.3	%	48.3	%	Units
Tuckerman Capital V Co-Investment I LP	48.3	%	48.1	%	Units

⁽¹⁾Sirius Group holds investments in several financing instruments of Pie Insurance Holding, Inc.

Note 17. Variable interest entities

Sirius Group consolidates the results of operations and financial position of every voting interest entity ("VOE") in which it has a controlling financial interest and VIEs in which it is considered to be the primary beneficiary. The consolidation assessment, including the determination as to whether an entity qualifies as a VOE or VIE, depends on the facts and circumstances surrounding each entity.

38

Sirius International Insurance Group, Ltd.

Notes to Consolidated Financial Statements

Unaudited

Sirius Group has determined that Alstead Re is a VIE for which Sirius Group is the primary beneficiary and is required to consolidate it. The following table presents Alstead Re's assets and liabilities, as classified in the Consolidated Balance Sheets as of March 31, 2020 and December 31, 2019:

(Millions)	March 31, 2020			December 31, 2019
Assets:
Fixed maturity investments	$	3.6		$	3.9
Short-term investments	0.5			0.5
Cash	0.1			0.1
Total investments	4.2			4.5
Insurance and reinsurance premiums receivable	(0.5		)	(0.3		)
Funds held by ceding companies	3.4			3.4
Deferred acquisition costs	0.1			0.3
Other assets	—			—
Total assets	$	7.2		$	7.9
Liabilities
Loss and loss adjustment expense reserves	$	0.4		$	0.5
Unearned insurance and reinsurance premiums	0.1			0.6
Other liabilities	0.1			0.1
Total liabilities	$	0.6		$	1.2

Sirius Group is a passive investor in certain third-party-managed hedge and private equity funds, some of which are VIEs. Sirius Group is not involved in the design or establishment of these VIEs, nor does it actively participate in the management of the VIEs. The exposure to loss from these investments is limited to the carrying value of the investments at the balance sheet date.

Sirius Group calculates maximum exposure to loss to be (i) the amount invested in the debt or equity of the VIE, (ii) the notional amount of VIE assets or liabilities where Sirius Group has also provided credit protection to the VIE with the VIE as the referenced obligation, and (iii) other commitments and guarantees to the VIE. Sirius Group does not have any VIEs that it sponsors nor any VIEs where it has recourse to it or has provided a guarantee to the VIE interest holders.

The following table presents total assets of unconsolidated VIEs in which Sirius Group holds a variable interest, as well as the maximum exposure to loss associated with these VIEs:

			Maximum Exposure to Loss
(Millions)	Total VIE Assets		On-Balance Sheet		Off-Balance Sheet		Total
March 31, 2020
Other long-term investments(1)	$	250.7	$	103.0	$	8.8	$	111.8
Total at March 31, 2020	$	250.7	$	103.0	$	8.8	$	111.8
December 31, 2019
Other long-term investments(1)	$	257.8	$	102.6	$	16.3	$	118.9
Total at December 31, 2019	$	257.8	$	102.6	$	16.3	$	118.9

⁽¹⁾Comprised primarily of hedge funds and private equity funds.

39

Sirius International Insurance Group, Ltd.

Notes to Consolidated Financial Statements

Unaudited

Note 18. Transactions with related parties

(Re)insurance contracts

In the normal course of business, Sirius Group enters into insurance and reinsurance contracts with certain of its insurance and MGU affiliates, or their subsidiaries. During the three months ended March 31, 2020 and 2019, these contracts resulted in gross written premiums of $41.3 million and $24.1 million, respectively. As of March 31, 2020 and December 31, 2019, Sirius Group had total receivables due from affiliates of $31.0 million and $16.1 million, respectively. As of both March 31, 2020 and December 31, 2019, Sirius Group had total payables due to affiliates of $0.9 million.

Other

Meyer "Sandy" Frucher is the Company's Chairman of the Board of Directors and was also Vice Chairman of Nasdaq, Inc. ("Nasdaq") until December 2019. On January 1, 2020, Mr. Frucher concluded his tenure as Vice Chairman of Nasdaq and assumed the role of Strategic Advisor. The Company is traded on the Nasdaq Global Select Market and has business transactions that are related to its listing on the exchange under the normal course of business. (See Note 3.)

Note 19. Commitments and contingencies

Legal Proceedings

Sirius Group, and the insurance and reinsurance industry in general, are routinely subject to claims related litigation and arbitration in the normal course of business, as well as litigation and arbitration that do not arise from, or are directly related to, claims activity. Sirius Group estimates of the costs of settling matters routinely encountered in claims activity are reflected in the reserves for unpaid loss and LAE. (See Note 5.)

Sirius Group considers the requirements of ASC 450, Contingencies ("ASC 450"), when evaluating its exposure to non-claims related litigation and arbitration. ASC 450 requires that accruals be established for litigation and arbitration if it is probable that a loss has been incurred and it can be reasonably estimated. ASC 450 also requires that litigation and arbitration be disclosed if it is probable that a loss has been incurred or it there is a reasonable possibility that a loss may have been incurred. Management has considered all pending and/or threatened non-claims related litigation and has not identified any matters triggering disclosure under ASC 450.

Leases

Sirius Group leases office space and equipment under various noncancelable operating lease agreements. The average life of the office leases is 7 years and the equipment leases is 3 years.

During the three months ended March 31, 2020 and March 31, 2019, Sirius Group recognized operating lease expense of $3.0 million and $2.6 million, respectively, including property taxes and routine maintenance expense as well as rental expenses related to short term leases. As of March 31, 2020 and December 31, 2019, Sirius Group had $26.1 million and $27.4 million of operating lease right-of-use assets, respectively, included in Other assets. As of March 31, 2020 and December 31, 2019, Sirius Group had $27.8 million and $29.3 million of operating lease liability, respectively, included in Other liabilities.

The following table presents the lease balances within the Consolidated Balance Sheets as of March 31, 2020 and December 31, 2019:

(millions)	Balance Sheet Classification	March 31, 2020		December 31, 2019
Operating lease right-of-use assets	Other assets		$26.1		$27.4
Current lease liabilities	Other liabilities		$7.6		$8.3
Non-current lease liabilities	Other liabilities		$20.2		$21.0

40

Sirius International Insurance Group, Ltd.

Notes to Consolidated Financial Statements

Unaudited

The following table presents weighted average remaining lease term and weighted average discount rate as of March 31, 2020:

Weighted average lease term (years) as at March 31, 2020
Leased offices	7 years
Leased equipment	3 years
Weighted average discount rate:
Leased offices	3.6	%
Leased equipment	3.4	%

The following table presents future annual minimum rental payments required under non-cancellable leases and the present value discount to arrive at total lease liability as of March 31, 2020:

(Millions)	Future Payments
2020	$	6.5
2021	8.1
2022	7.2
2023	4.7
2024	2.3
2025 and after	1.1
Total future annual minimum rental payments as of March 31, 2020	29.9
Less: present value discount	(2.1		)
Total lease liability as of March 31, 2020	$	27.8

As of March 31, 2020, the Company's future operating lease obligations that have not yet commenced are immaterial.

ITEM 2. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

The following is management's discussion and analysis ("MD&A") of the Company's unaudited consolidated results of operations for the three months ended March 31, 2020 and 2019 and the Company's consolidated financial condition, liquidity and capital resources as of March 31, 2020 and December 31, 2019. This discussion and analysis should be read in conjunction with our historical consolidated financial statements and the related notes appearing in our Annual Report on Form 10-K for the year ended December 31, 2019 (our "2019 Annual Report"), filed with the Securities and Exchange Commission ("SEC") on March 5, 2020, and the Company's Unaudited Consolidated Financial Statements and related notes included elsewhere in this Quarterly Report on Form 10-Q. The consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States of America ("GAAP").

The following MD&A includes forward-looking statements, which are subject to risks, uncertainties and other factors that could cause our actual results to differ materially from those expressed or implied by our forward-looking statements. See "Cautionary Note Regarding Forward-Looking Statements".

41

INDEX TO MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

	Page
Overview	42
Executive Summary	43
Consolidated Results of Operations – Three Months Ended March 31, 2020 and 2019	45
Summary of Investment Results	47
Foreign Currency Translation	49
Results of Reportable Segments	50
Global Reinsurance	51
Global A&H	53
U.S. Specialty	54
Runoff & Other	55
Reinsurance Protection	56
Non-GAAP Financial Measures	57
Liquidity and Capital Resources	58
Off Balance Sheet Arrangements	63
Contractual Obligations and Commitments	64
Cash Flows	64
Summary of Critical Accounting Estimates	65

Overview

The Company is a Bermuda exempted company that provides multi-line insurance and reinsurance on a worldwide basis through its wholly owned subsidiaries. Sirius Group's key insurance and reinsurance subsidiaries include Sirius Bermuda Insurance Company Ltd. ("Sirius Bermuda"), Sirius International Insurance Corporation ("Sirius International"), Sirius America Insurance Company ("Sirius America"), Sirius International Corporate Member Limited, a Lloyd's of London ("Lloyd's") Corporate Member, and Sirius Global Solutions Holding Company ("Sirius Global Solutions"). In addition, Sirius International sponsors Lloyd's Syndicate 1945 ("Syndicate 1945") and Sirius International Corporate Member participates in the Lloyd's market, which in turn provides underwriting capacity to Syndicate 1945. In addition to the key insurance and reinsurance subsidiaries, we own two managing general underwriters ("MGUs"), International Medical Group, Inc. ("IMG") and ArmadaCorp Capital, LLC ("Armada").

Background and Recent Developments

COVID-19

The novel coronavirus (COVID-19) pandemic has adversely affected our business and our results of operations, financial position, and future liquidity. Because of the size and duration of this pandemic, all of the direct and indirect consequences of COVID-19 are not yet known and may not emerge for some time. The future impact of the pandemic is highly uncertain and cannot be predicted. For a further discussion on Sirius Group’s risks related to COVID-19, see “The novel coronavirus (COVID-19) pandemic has adversely affected our business. Epidemics, pandemics, and other public health threats, including the ongoing COVID-19 pandemic, could have a material adverse effect on Sirius Group’s business, including our results of operations, financial position and/or liquidity, in a manner and to a degree that cannot be predicted” included in Part II, Item 1A. “Risk Factors” of this Quarterly Report on Form 10-Q.

The safety and welfare of our employees is our highest priority during the COVID-19 pandemic. We implemented various business continuity and crisis management procedures to ensure all functions remained fully operational, which included daily and weekly management meetings both globally and locally as well as the monitoring of core business processes and outcomes. Prior to our decision to work remotely, we confirmed that all of our employees had access to our network, telecommunications equipment, and would remain fully operational. As a result of these actions, we have experienced no material disruptions in our business operations that would affect our clients.

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COVID-19 impacted our underwriting results in the quarter. We reviewed our inforce (re)insurance portfolios to estimate our ultimate losses under the assumption that all projected losses should be recognized in the quarter. As a result, we recorded $140 million of estimated ultimate losses in our underwriting results, which includes losses from Contingency, Trade Credit, Property, and to a lesser extent Accident & Health and Casualty. This best estimate of ultimate loss was based on our evaluation of the information readily available at this time, including an analysis of reported claims, an underwriting review of in-force contracts, industry estimates of ultimate losses, and other factors requiring considerable judgment. There may be additional future losses from COVID-19 which have not yet been reflected in Sirius Group’s estimates, if loss emergence varies from our initial expectations.

The impacts of the broader economic slowdown and decline in travel will impact our premium volume in certain lines going forward. The degree of the impact will depend on the extent and duration of the economic contraction. As a result of the anticipated impact of the pandemic on our earned premiums, we expect an increase in our underwriting expense ratio in the near term. Sirius Group may also experience lower gross written premiums for travel medical and trip cancellation insurance.

Sirius Group experienced losses in its investment portfolio as a result of volatile markets, such as a decline in interest rates, a sharp decline in equity markets and a widening of credit risk spreads for bonds. In addition, the disruption in the financial markets related to COVID-19 contributed to net unrealized investment losses, primarily due to the impact of changes in fair value on our equity investments and, to a lesser extent, change in unrealized losses in our fixed-income investment portfolio.

Loss Portfolio Transfer

On January 23, 2020, Sirius Group entered into a Loss Portfolio Transfer ("LPT") with Pacific Re, Inc.  Under the agreement, Sirius Group received $70 million in cash and assumed net undiscounted loss and LAE reserves with the same value. In addition, Sirius Group recognized Gross written premiums and Loss and losses adjustment expenses of $70 million.

Reportable Segments

On December 31, 2019, Sirius Group completed an internal reorganization to optimize the Company's operations, better serve its clients and make the Company more nimble and efficient. Beginning on January 1, 2020, Sirius Group's reportable segments consist of four reportable segments – Global Reinsurance, Global A&H, U.S. Specialty, and Runoff & Other.

• Global Reinsurance consists of Sirius Group's underwriting lines of business that offer Other Property, Property Catastrophe Excess Reinsurance, Agriculture Reinsurance, Aviation & Space, Marine & Energy, Trade Credit, Contingency, and Casualty Reinsurance;

• Global A&H consists of Sirius Group's Global A&H insurance and reinsurance underwriting business along with IMG and Armada, which provide supplemental healthcare and medical travel insurance products as well as related administration services;

• U.S. Specialty consists of Sirius Group's specialty insurance product offerings, which includes Environmental, Surety, and Workers’ Compensation. In April 2020, the Company decided to exit the Surety business due to competitive market conditions in that business line. In addition, the recent economic downturn presents new risks and challenges for this line of business; and

• Runoff & Other consists of the results of Sirius Global Solutions, which specializes in the acquisition and management of runoff liabilities for insurance and reinsurance companies, both in the United States and internationally, as well as asbestos risks, environmental risks and other long-tailed liability exposures.

Executive Summary

Three Months Ended March 31, 2020 and 2019

Sirius Group ended the first quarter of 2020 with a net (loss) attributable to common shareholders of $(98) million and basic earnings per common share of $(0.85) and diluted earnings per share of $(0.96). This compares to net income attributable to common shareholders of $95 million and basic earnings per common share of $0.75 and diluted earnings per share of $0.74 for the three months ended March 31, 2019. The decrease was driven primarily by $140 million from COVID-19 losses, net of reinsurance, in Global Reinsurance ($126 million) and Global A&H ($14 million) and net unrealized investment losses. The three months ended March 31, 2020 results included $4 million of net unfavorable prior year loss reserve development compared to $17 million of net unfavorable prior year loss reserve development for the three months ended March 31, 2019. During the three months ended March 31, 2020, Sirius Group recorded catastrophe losses, net of reinsurance and reinstatement premiums, of $9 million compared to $2 million for the three months ended March 31, 2019.

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Sirius Group's combined ratio was 124% for the three months ended March 31, 2020 compared to 91% for the three months ended March 31, 2019. The increase in the combined ratio from the prior period was driven primarily by COVID-19 losses of $140 million (32 points). Sirius Group's combined ratio included 2 points of catastrophe losses for the three months ended March 31, 2020 compared to 1 point for the three months ended March 31, 2019. The combined ratio for the three months ended March 31, 2020 was impacted by 1 point of net unfavorable prior year loss reserve development compared to 5 points of net unfavorable prior year loss reserve development for the three months ended March 31, 2019.

Book Value Per Common Share

Sirius Group ended the first three months of 2020 with book value per common share of $12.78 compared to book value per common share of $14.23 as of December 31, 2019, a decrease of 10.2% due to the comprehensive (loss) of $(185) million recognized for the three months ended March 31, 2020. Total common shareholders’ equity at the end of the first quarter of 2020 was $1,474 million compared to $1,640 million as of December 31, 2019.

Return on Equity

Return on Equity ("ROE"), calculated by dividing Net (loss) income attributable to Sirius Group's common shareholders for the period by beginning common shareholders' equity, was (6.0)% for the three months ended March 31, 2020 compared to 5.6% for the three months ended March 31, 2019 due to the net (loss) recognized.

Operating (loss) income attributable to common shareholders

For the three months ended March 31, 2020, Operating (loss) income attributable to common shareholders was $(100) million compared to $19 million for the three months ended March 31, 2019, primarily due to the net underwriting (loss) recognized in the first quarter of 2020.

See "Non-GAAP Financial Measures" for an explanation and calculation of Operating (loss) income attributable to common shareholders.

Adjusted Book Value Per Share

Sirius Group ended the first three months of 2020 with Adjusted book value per share of $13.08, which assumes that the Series B preference shares will convert into common shares on a one-for-one basis, and also incorporates the impact of dilution arising from share-based compensation programs, compared to $14.57 as of December 31, 2019, a decrease of 10.2% due to the comprehensive (loss) recognized. For the three months ended March 31, 2020, Adjusted book value and Adjusted book value per share include the earned effects of share-based compensation awards issued during 2019.

See "Non-GAAP Financial Measures" for an explanation and calculation of Adjusted book value and Adjusted book value per share.

Adjusted Tangible Book Value Per Share

Sirius Group ended the first three months of 2020 with Adjusted tangible book value per share, which is derived by subtracting Goodwill, Intangible assets, and Net deferred tax liability on intangible assets from Adjusted book value, and also incorporates the impact of dilution arising from share-based compensation programs, of $8.75 compared to $10.22 as of December 31, 2019, a decrease of 14.4% due to the comprehensive (loss) recognized.

See "Non-GAAP Financial Measures" for an explanation and calculation of Adjusted tangible book value and Adjusted tangible book value per share.

44

Consolidated Results of Operations – Three Months Ended March 31, 2020 and 2019

(Expressed in millions of U.S. dollars, except ratios, share and per share information)

	Three months ended March 31,
	2020			2019
Revenues
Gross written premiums	$	817.6		$	622.3
Net written premiums	$	629.9		$	484.8
Net earned insurance and reinsurance premiums	$	434.7		$	311.9
Net investment income	13.5			20.1
Net realized investment gains	20.3			9.0
Net unrealized investment (losses) gains	(43.8		)	74.0
Net foreign exchange gains	18.5			5.1
Other revenue	4.3			19.6
Total revenues	447.5			439.7
Expenses
Loss and loss adjustment expenses ("LAE")	427.1			183.9
Insurance and reinsurance acquisition expenses	74.7			63.3
Other underwriting expenses	38.0			35.3
General and administrative expenses	32.1			24.4
Intangible asset amortization expenses	3.9			3.9
Interest expense on debt	7.8			7.6
Total expenses	583.6			318.4
Pre-tax (loss) income	(136.1		)	121.3
Income tax benefit (expense)	14.8			(17.2		)
Net (loss) income	(121.3		)	104.1
Income attributable to non-controlling interests	(0.2		)	(0.4		)
Net (loss) income attributable to Sirius Group	(121.5		)	103.7
Change in carrying value of Series B preference shares	23.4			(8.4		)
Net (loss) income attributable to Sirius Group's common shareholders	$	(98.1	)	$	95.3
Comprehensive (loss) income
Net (loss) income	$	(121.3	)	$	104.1
Other comprehensive (loss), net of tax
Change in foreign currency translation, net of tax	(63.4		)	(27.8		)
Total other comprehensive (loss)	(63.4		)	(27.8		)
Comprehensive (loss) income	(184.7		)	76.3
Income attributable to non-controlling interests	(0.2		)	(0.4		)
Comprehensive (loss) income attributable to Sirius Group	$	(184.9	)	$	75.9
Ratios:
Loss ratio(1)	98.3		%	59.0		%
Acquisition expense ratio(2)	17.2		%	20.3		%
Other underwriting expense ratio(3)	8.7		%	11.3		%
Combined ratio(4)	124.2		%	90.6		%
Selected financial data:
Basic earnings per common share and common shares equivalent	$	(0.85	)	$	0.75
Diluted earnings per common share and common shares equivalent	$	(0.96	)	$	0.74
Basic weighted average number of common shares and common share equivalents outstanding	115,262,302			115,182,331
Diluted weighted average number of common shares and common share equivalents outstanding	127,163,972			127,335,314
Return on equity(5)	(6.0		)%	5.6		%
Operating (loss) income attributable to common shareholders(6)	$	(100.3	)	$	18.9

⁽¹⁾The loss ratio is calculated by dividing loss and LAE expenses by net earned insurance and reinsurance premiums.

⁽²⁾The acquisition expense ratio is calculated by dividing insurance and reinsurance acquisition expenses by net earned insurance and reinsurance premiums.

⁽³⁾The other underwriting expense ratio is calculated by dividing other underwriting expenses by net earned insurance and reinsurance premiums.

⁽⁴⁾The combined ratio is calculated by combining the loss ratio, the acquisition expense ratio, and the other underwriting expense ratio.

⁽⁵⁾Return on equity is calculated by dividing Net (loss) income attributable to Sirius Group's common shareholders for the period by beginning common shareholders' equity.

⁽⁶⁾Operating (loss) income attributable to common shareholders is a non-GAAP financial measure. See "Non-GAAP Financial Measures" for an explanation and calculation of Operating (loss) income attributable to common shareholders.

45

	As of March 31, 2020		As of December 31, 2019
Selected balance sheet data:
Book value per common share (1)	$	12.78	$	14.23
Adjusted book value per share (2)	$	13.08	$	14.57
Adjusted tangible book value per share (2)	$	8.75	$	10.22

⁽¹⁾Book value per common share is calculated by dividing Total common shareholders' equity by the total number of Common shares outstanding.

⁽²⁾Adjusted book value per share and Adjusted tangible book value per share are non-GAAP financial measures. See "Non-GAAP Financial Measures" for an explanation and calculation of Adjusted book value per share and Adjusted tangible book value per share.

Three Months Ended March 31, 2020 and 2019

Gross written premiums – Gross written premiums for the three months ended March 31, 2020 were $818 million, an increase of $196 million or 32% compared to gross written premiums of $622 million for the three months ended March 31, 2019, with Global A&H up 55%. U.S. Specialty up 24%, and Global Reinsurance up 7%. Runoff & Other gross written premiums increased to $69 million for the three months ended March 31, 2020 from $1 million for the three months ended March 31, 2019 due to the LPT. Absent the effect of the LPT within the Runoff & Other segment, gross written premiums increased 20% compared to the prior period. See "Results of Reportable Segments" below.

Net written premiums – Net written premiums for the three months ended March 31, 2020 were $630 million, an increase of $145 million or 30% compared to net written premiums of $485 million for the three months ended March 31, 2019, with Global A&H up 49%, U.S. Specialty up 7%, and Global Reinsurance up 3%. Runoff & Other net written premiums increased to $69 million for the three months ended March 31, 2020 from less than $1 million for the three months ended March 31, 2019 due to the LPT. Absent the effect of the LPT within the Runoff & Other segment, net written premiums increased 16% compared to the prior period. See "Results of Reportable Segments" below.

Net earned insurance and reinsurance premiums – Net earned insurance and reinsurance premiums for the three months ended March 31, 2020 were $435 million, an increase of $123 million or 39% compared to net earned premiums of $312 million for the three months ended March 31, 2019, with U.S. Specialty up 225%, Global A&H up 23% and Global Reinsurance up 11%. Runoff & Other net earned insurance and reinsurance premiums increased to $69 million for the three months ended March 31, 2020 from less than $1 million for the three months ended March 31, 2019 due to the LPT. See "Results of Reportable Segments" below.

Net investment income, Net realized investment gains, Net unrealized investment (losses) gains, and Net foreign exchange gains – Net investment income decreased to $14 million for the three months ended March 31, 2020 from $20 million for the three months ended March 31, 2019 due primarily to lower yields on fixed maturity investments and lower income on other long-term investment as well as increased investments in lower yielding short-term investments. Sirius Group reported net realized investment gains of $20 million for the three months ended March 31, 2020, which included $11 million of net realized foreign currency gains, compared to net realized investment gains of $9 million for the three months ended March 31, 2019, which included $11 million of net realized foreign currency gains. Net unrealized investment (losses) were $(44) million for the three months ended March 31, 2020, which included $53 million of net unrealized foreign currency gains, compared to net unrealized investment gains of $74 million for the three months ended March 31, 2019, which included $25 million of net unrealized foreign currency gains. See "Summary of Investment Results" below. Additionally, Sirius Group recorded $19 million of non-investment related foreign exchange gains for the three months ended March 31, 2020 compared to $5 million of non-investment related foreign exchange gains for the three months ended March 31, 2019. Included in the amount for the three months ended March 31, 2020 is $21 million of favorable currency movement compared to $11 million of favorable currency movement for the three months March 31, 2019 on the 2017 SEK Subordinated Notes (as defined herein). See "Foreign Currency Translation" below.

Other revenue – Other revenue decreased to $4 million for the three months ended March 31, 2020 from $20 million for the three months ended March 31, 2019. The decrease in other revenue was primarily attributable to a $(20) million (loss) on the change in the fair value of weather derivatives compared to a $(6) million (loss) for the three months ended March 31, 2019.

46

Loss and loss adjustment expenses – Loss and loss adjustment expenses increased 132% to $427 million for the three months ended March 31, 2020 from $184 million for the three months ended March 31, 2019 primarily due to COVID-19 losses and increased net earned insurance and reinsurance premiums. In addition, Runoff & Other loss and loss adjustment expenses increased to $70 million for the three months ended March 31, 2020 from $2 million for the three months ended March 31, 2019 due to the LPT. See "Results of Reportable Segments" below.

Insurance and reinsurance acquisition expenses – Insurance and reinsurance acquisition expenses increased 19% to $75 million for the three months ended March 31, 2020 from $63 million for the three months ended March 31, 2019 primarily due to an increase in net earned insurance and reinsurance premiums for Global Reinsurance, Global A&H, and U.S. Specialty for the three months ended March 31, 2020 as well as business mix. See "Results of Reportable Segments" below.

Other underwriting expenses – Other underwriting expenses increased 9% to $38 million for the three months ended March 31, 2020 from $35 million for the three months ended March 31, 2019. See "Results of Reportable Segments" below.

General and administrative expenses – General and administrative expenses increased 33% to $32 million for the three months ended March 31, 2020 from $24 million for the three months ended March 31, 2019 primarily due to retention awards that were issued to key employees in November 2019. See Note 13 "Share-based compensation" in Sirius Group's unaudited financial statements included elsewhere in this Quarterly Report on Form 10-Q for further details and discussion.

Summary of Investment Results

Pre-Tax Return on Investments

Total return on investments includes investment income, net realized gains and losses, and the change in unrealized gains and losses generated by the investment portfolio including equity method eligible investments for which we have made a fair value election. Total return is calculated on a pre-tax basis and includes the impact of investment related foreign exchange gains or losses whether reflected in pre-tax income or other comprehensive income, unless otherwise noted. Returns are calculated on average investments for the period displayed and presented gross of separately managed account fees as well as internal expenses in order to produce a better comparison to benchmark returns that exclude an expense load.

Sirius Group maintains an equity portfolio that consists of equity securities and other long-term investments, including hedge funds, private equity funds, and direct investments in privately held common equity securities investments. From time to time, Sirius Group may also invest in exchange-traded funds ("ETFs") and mutual funds. For return purposes, investments in fixed-income ETFs and mutual funds are included in the fixed income results and excluded from equity portfolio results. Returns exclude the impact of third-party currency forwards and/or swaps.

A summary of Sirius Group's total pre-tax net investment results and performance metrics for the three months ended March 31. 2020 and 2019, respectively, follows:

	Three months ended March 31,
(Millions)	2020			2019
Pre-tax investment results
Net investment income	$	13.5		$	20.1
Net realized and unrealized investment (losses) gains (1)	(23.5		)	83.0
Change in foreign currency translation on investments recognized through other comprehensive income(2)	(94.6		)	(41.7		)
Net pre-tax investment (losses) gains	$	(104.6	)	$	61.4

⁽¹⁾Includes foreign exchange gains for the three months ended March 31, 2020 and 2019 of $63.8 million and $35.9 million, respectively.

⁽²⁾Excludes non-investment related foreign exchange gains for the three months ended March 31, 2020 and 2019 of $18.5 million and $5.1 million, respectively.

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	Three months ended March 31,
	2020		2019
Performance metrics
Total fixed income investment returns:
In U.S. dollars	(1.3	)%	1.1	%
In local currencies	(0.6	)%	1.2	%
Bloomberg Barclays U.S. Agg 1-3 Year Total Return Value Unhedged USD	1.8	%	1.2	%
OMX Stockholm OMRX Total Bond Index	0.6	%	0.9	%
Bloomberg Barclays Pan-European Aggregate: Corp 1-3 Years Total Return	(3.3	)%	1.3	%
Total equity securities and other long-term investments returns:
In U.S. dollars	(8.8	)%	6.0	%
In local currencies	(8.0	)%	5.9	%
S&P 500 Index (total return)	(19.6	)%	13.6	%
Total consolidated portfolio
In U.S. dollars	(2.6	)%	1.9	%
In local currencies	(1.8	)%	2.0	%

Three months ended March 31, 2020 and 2019

Sirius Group’s pre-tax total gross return on invested assets was (2.6)% for the three months ended March 31, 2020 compared to 1.9% for the three months ended March 31, 2019. The result for the three months ended March 31, 2020 was impacted by unfavorable market conditions and included foreign currency losses on investments, which decreased the total pre-tax return by (0.8)%. The quarterly currency loss was generated mainly from our Swedish kronor (“SEK”) and Canadian dollar (“CAD”) holdings as these currencies weakened against the U.S. dollar. The result for the three months ended March 31, 2019 included foreign currency losses on investments, which decreased the total pre-tax return by (0.1)%. The quarterly currency loss was generated mainly from SEK holdings as the SEK weakened against the U.S. dollar.

Net investment income was $14 million for the three months ended March 31, 2020 compared to $20 million for the three months ended March 31, 2019 due primarily to lower yields on fixed maturity investments and lower income on other long-term investment as well as increased investments in lower yielding short-term investments.

Net realized and unrealized investment (losses) gains on investments, excluding foreign currency, were $(87) million for the three months ended March 31, 2020 compared to $47 million for the three months ended March 31, 2019. The decrease was driven by unrealized investment losses consistent with overall market performance.

Fixed income results (including short-term investments)

As of March 31, 2020 and December 31, 2019, the fixed income portfolio duration was approximately 1.6 years. The average credit quality of the fixed income portfolio, including short-term investments, was AA as of March 31, 2020 and December 31, 2019. As of March 31, 2020 and December 31, 2019, Sirius Group held $414 million and $341 million, respectively, of non-U.S. denominated fixed income securities.

The fixed income portfolio returned (1.3)% on a U.S. dollar basis and (0.6)% in local currencies for the three months ended March 31, 2020. Our U.S. portfolio returned (0.7)% versus the Bloomberg Barclays U.S. Aggregate 1-3 Year (“BarcAgg1-3”) of 1.8%. The difference is due to a lower duration and a lower share of U.S. government issued securities of our U.S. portfolio compared to the BarcAgg1-3. Our non-U.S. portfolio returned 0.0% in original currencies compared to the OMX Stockholm OMRX Total Return Bond Index (“OMRX”) of 0.6%.

The fixed income portfolio gained 1.1% on a U.S. dollar basis and 1.2% in local currencies for the three months ended March 31, 2019. Our U.S. portfolio returned 1.3% versus the BarcAgg1-3 of 1.2%. Our non-U.S. portfolio returned 0.4% in original currencies, which compares to the OMRX of 0.9%.

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Equity securities and other long-term investments results

As of March 31, 2020, the equity and other long-term investments portfolio included $490 million of U.S. dollar and $130 million of non-U.S. dollar denominated securities. As of December 31, 2019, the equity and other long-term investments portfolio included $482 million of U.S. dollar and $187 million of non-U.S. dollar denominated securities.

For the three-months ended March 31, 2020, the equity portfolio returned (8.8)% on a U.S. dollar basis and (8.0)% on a local currency basis. The S&P 500 returned (19.6)% for the same period. Performance was affected by general unfavorable market conditions caused by COVID-19 but surpassed the S&P 500 because of the risk nature of our private equity portfolio and strategies to reduce systematic risk.

For the three-months ended March 31, 2019, the equity portfolio gained 6.0% on a U.S. dollar basis and 5.9% on a local currency basis. The S&P 500 gained 13.6% for the same period. Performance lagged the S&P 500 in the first quarter of 2019 given the performance of our private equity investments that were in the early stages of the investment period.

Foreign Currency Translation

Impact of Foreign Currency Translation

The U.S. dollar is the functional currency for Sirius Group's businesses except for Sirius International, Syndicate 1945, several subsidiaries of IMG, and the Canadian reinsurance operations of Sirius America. Sirius Group also invests in securities denominated in foreign currencies. Assets and liabilities recorded in these foreign currencies are translated into U.S. dollars at exchange rates in effect at the balance sheet date, and revenues and expenses are converted using the average exchange rates for the period. Net foreign exchange gains and losses arising from the translation of functional currencies into U.S. dollars are reported in common shareholders' equity and in Accumulated other comprehensive (loss). As of March 31, 2020 and December 31, 2019, Sirius Group had net unrealized foreign currency translation (losses) of $(301) million and $(238) million, respectively, recorded in Accumulated other comprehensive (loss) on its Consolidated Balance Sheets.

Assets and liabilities relating to foreign operations are remeasured into the functional currency using current exchange rates; revenues and expenses are remeasured into the functional currency using the weighted average exchange rate for the period. The resulting exchange gains and losses are reported as a component of Net income (loss) in the period in which they arise within Net realized investment gains (losses), Net unrealized investment gains (losses), and Net foreign exchange gains (losses).

The following rates of exchange for the U.S. dollar have been used for translation of investments whose functional currency is not the U.S. dollar as of March 31, 2020 and December 31, 2019:

Currency	Closing Rate March 31, 2020	Closing Rate December 31, 2019
Swedish kronor	10.0294	9.3210
British pound	0.8061	0.7568
Euro	0.9129	0.8912
Canadian dollar	1.4333	1.3003

Sirius International holds a large portfolio of investments that are denominated in U.S. dollars, but its functional currency is the SEK. When Sirius International prepares its stand-alone GAAP financial statements, it remeasures its U.S. dollar-denominated investments to SEK and recognizes the related foreign currency remeasurement gains or losses through pre-tax income (loss). When Sirius Group consolidates Sirius International, it translates Sirius International's stand-alone GAAP financial statements to U.S. dollars and recognizes the related foreign currency translation gains or losses through other comprehensive income (loss). Since Sirius Group reports its financial statements in U.S. dollars, there is no net effect to book value per common share or to investment returns from foreign currency translation on its U.S. dollar-denominated investments at Sirius International. However, net realized and unrealized investment gains (losses), other revenues, net income (loss), earnings per share and other comprehensive income (loss) can be significantly affected during periods of high volatility in the foreign exchange rate between the U.S. dollar and other currencies, especially the SEK.

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A summary of the impact of foreign currency translation on Sirius Group's consolidated financial results for the three months ended March 31, 2020 and 2019 follows:

(Millions)	Three months ended March 31,
	2020			2019
Net realized investment gains - foreign currency(1)	$	11.1		$	10.9
Net unrealized investment gains - foreign currency(2)	52.7			25.0
Net realized and unrealized investment gains - foreign currency	63.8			35.9
Net foreign exchange gains - foreign currency translation gains (3)	12.0			4.1
Net foreign exchange gains - currency swaps(3)	6.0			1.0
Net foreign exchange gains - currency forwards(3)	0.5			—
Income tax (expense)	(1.4		)	(0.2		)
Total foreign currency remeasurement gains recognized through net (loss) income, after tax	80.9			40.8
Change in foreign currency translation on investments recognized through other comprehensive (loss), after tax	(94.6		)	(41.7		)
Change in foreign currency translation on non - investment net liabilities recognized through other comprehensive (loss), after tax	31.2			13.9
Total foreign currency translation (losses) recognized through other comprehensive (loss), after tax	(63.4		)	(27.8		)
Total foreign currency gains recognized in comprehensive (loss) income, after tax	$	17.5		$	13.0

⁽¹⁾Component of Net realized investment gains on the Consolidated Statements of (Loss) Income

⁽²⁾Component of Net unrealized investment (losses) gains on the Consolidated Statements of (Loss) Income

⁽³⁾Component of Net foreign exchange gains on the Consolidated Statements of (Loss) Income

As of March 31, 2020, the following currencies represented the largest exposure to foreign currency risk as a percentage of Sirius Group's common shareholders' equity: the Euro 8% (short) and the Canadian dollar 2% (long).

As of December 31, 2019, the following currencies represented the largest exposure to foreign currency risk as a percentage of Sirius Group's common shareholders' equity: the Japanese Yen 9% (short) and the SEK 3% (long).

Investment portfolio composition by currency

As of March 31, 2020 and December 31, 2019, Sirius Group's investment portfolio included approximately $495 million and $484 million of non-U.S. dollar denominated investments, most of which is denominated in Swedish kronor, Canadian dollar, Euro, Israeli shekel, and British pound. The investment values in this portfolio are impacted by changes in the exchange rate between the U.S. dollar and those currencies.

Set forth below is the carrying value of our cash and investment holdings in U.S. dollars and foreign currencies as of March 31, 2020 and December 31, 2019:

	Carrying Value at March 31, 2020		Carrying Value at December 31, 2019
Currency (Millions)	Local Currency	USD	Local Currency	USD
U.S. Dollar	3,001.4	$3,001.4	3,034.1	$3,034.1
Swedish kronor	1,461.3	145.7	1,513.7	162.4
Canadian dollar	111.4	77.7	113.1	87.0
Euro	58.9	64.5	78.2	87.7
Israeli shekel	214.9	60.6	264.8	76.6
British pound	8.5	10.5	8.5	11.2
Other	—	135.6	—	59.2
Total investments		$3,496.0		$3,518.2

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Results of Reportable Segments

Global Reinsurance

Global Reinsurance consists of Sirius Group's underwriting lines of business that offer Other Property, Property Catastrophe Excess Reinsurance, Agriculture Reinsurance, Aviation & Space, Marine & Energy, Trade Credit, Contingency, and Casualty Reinsurance.

	Three months ended March 31,
Global Reinsurance(Millions)	2020			2019
Gross written premiums	$	465.3		$	435.0
Net written premiums	345.4			335.9
Net earned insurance and reinsurance premiums	235.0			211.3
Loss and allocated LAE	(257.2		)	(107.8		)
Insurance and reinsurance acquisition expenses	(50.9		)	(45.6		)
Technical (loss) profit	$	(73.1	)	$	57.9
Unallocated LAE	(5.0		)	(4.0		)
Other underwriting expenses	(21.3		)	(21.6		)
Underwriting (loss) income	$	(99.4	)	$	32.3
Ratios:
Loss ratio(1)	111.6		%	52.9		%
Acquisition expense ratio(2)	21.7		%	21.6		%
Other underwriting expense ratio(3)	9.1		%	10.2		%
Combined ratio(4)	142.4		%	84.7		%

⁽¹⁾The loss ratio is calculated by dividing the sum of loss and allocated LAE and unallocated LAE expenses by net earned insurance and reinsurance premiums.

⁽²⁾The acquisition expense ratio is calculated by dividing insurance and reinsurance acquisition expenses by net earned insurance and reinsurance premiums.

⁽³⁾The other underwriting expense ratio is calculated by dividing other underwriting expenses by net earned insurance and reinsurance premiums.

⁽⁴⁾The combined ratio is calculated by combining the loss ratio, the acquisition expense ratio, and the other underwriting expense ratio.

Underwriting Results

Three months ended March 31, 2020 and 2019:

Gross written premiums increased 7% to $465 million for the three months ended March 31, 2020 from $435 million for the three months ended March 31, 2019, due to increases in Casualty Reinsurance ($14 million), Aviation & Space ($7 million), and Property Catastrophe Excess Reinsurance ($5 million). Net written premiums increased 3% to $345 million for the three months ended March 31, 2020 from $336 million for the three months ended March 31, 2019 due primarily to increases in Casualty Reinsurance ($14 million) and Other Property ($7 million), partially offset by a reduction in Property Catastrophe Excess Reinsurance ($15 million). The reduction in Property Catastrophe Excess Reinsurance is due to lower net retentions.

Global Reinsurance produced a net combined ratio of 142% for the three months ended March 31, 2020 as compared to 85% for the three months ended March 31, 2019. The increase in the combined ratio was driven primarily by COVID-19.

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Global Reinsurance recorded an underwriting (loss) of $(99) million for the three months ended March 31, 2020 compared to underwriting income of $32 million for the three months ended March 31, 2019. The three months ended March 31, 2020 included COVID-19 losses, net of reinsurance, of $126 million (54 points) in Contingency ($55 million), Property Catastrophe Excess Reinsurance ($30 million), Other Property ($22 million), Trade Credit ($15 million), and Casualty Reinsurance ($4 million). Net unfavorable prior year loss reserve development was $9 million (4 points) for the three months ended March 31, 2020 as unfavorable prior year loss reserve development in Other Property ($13 million), Aviation & Space ($8 million), and Marine ($5 million) were partially offset by favorable prior year loss reserve development in Property Catastrophe Excess Reinsurance ($13 million) and Agriculture Reinsurance ($3 million). Net unfavorable prior year loss reserve development was $10 million (5 points) for the three months ended March 31, 2019 mainly due to unfavorable prior year loss reserve development in Other Property ($26 million) primarily due to catastrophe loss emergence, partially offset by favorable loss reserve development in Property Catastrophe Excess Reinsurance ($11 million) and Agriculture Reinsurance ($4 million). Catastrophe losses, net of reinsurance and reinstatement premiums, for the three months ended March 31, 2020 were $9 million (4 points) compared to $2 million (1 point) for the three months ended March 31, 2019.

Global Reinsurance gross written premiums

	Three months ended March 31,
Global Reinsurance (Millions)	2020		2019
Property Catastrophe Excess Reinsurance	$	169.7	$	165.3
Other Property	155.3		153.3
Casualty Reinsurance	64.8		50.7
Aviation & Space	23.8		17.3
Trade Credit	18.3		19.7
Marine & Energy	18.3		14.4
Agriculture Reinsurance	11.3		12.6
Contingency	3.8		1.7
Total	$	465.3	$	435.0

Three months ended March 31, 2020 and 2019:

Global Reinsurance's gross written premiums increased 7% to $465 million for the three months ended March 31, 2020 from $435 million for the three months ended March 31, 2019 due to increases in Casualty Reinsurance ($14 million), Aviation & Space ($7 million), and Property Catastrophe Excess Reinsurance ($5 million).

Global Reinsurance net earned insurance and reinsurance premiums

	Three months ended March 31,
Global Reinsurance (Millions)	2020		2019
Other Property	$	86.9	$	90.6
Casualty Reinsurance	54.3		36.0
Property Catastrophe Excess Reinsurance	47.4		44.1
Aviation & Space	19.3		14.6
Trade Credit	12.7		10.8
Marine & Energy	7.0		8.5
Agriculture Reinsurance	4.6		5.2
Contingency	2.8		1.6
Total	$	235.0	$	211.4

Three months ended March 31, 2020 and 2019:

Global Reinsurance's net earned insurance and reinsurance premiums increased 11% to $235 million for the three months ended March 31, 2020 from $211 million for the three months ended March 31, 2019 due primarily to increases in Casualty Reinsurance ($18 million) and Aviation & Space ($4 million).

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Global A&H

Global A&H consists of Sirius Group's Global A&H insurance and reinsurance underwriting business along with IMG and Armada, which provide supplemental healthcare and medical travel insurance products as well as related administration services.

	Three months ended March 31,
Global A&H (Millions)	2020			2019
Gross written premiums	$	262.1		$	169.3
Net written premiums	200.7			134.9
Net earned insurance and reinsurance premiums	117.9			96.1
Loss and allocated LAE	(80.3		)	(63.2		)
Insurance and reinsurance acquisition expenses	(30.8		)	(26.6		)
Technical profit	$	6.8		$	6.3
Unallocated LAE	(1.7		)	(1.5		)
Other underwriting expenses	(5.6		)	(6.1		)
Underwriting (loss)	$	(0.5	)	$	(1.3	)
Service fee revenue	35.9			36.3
MGU unallocated LAE	(6.0		)	(4.1		)
MGU other underwriting expenses	(5.0		)	(2.7		)
MGU general and administrative expenses	(14.2		)	(16.2		)
Underwriting income, including net service fee income	$	10.2		$	12.0
Ratios:
Loss ratio(1)	69.6		%	67.3		%
Acquisition expense ratio(2)	26.1		%	27.7		%
Other underwriting expense ratio(3)	4.7		%	6.3		%
Combined ratio(4)	100.4		%	101.3		%

⁽¹⁾The loss ratio is calculated by dividing the sum of loss and allocated LAE and unallocated LAE expenses by net earned insurance and reinsurance premiums.

⁽²⁾The acquisition expense ratio is calculated by dividing insurance and reinsurance acquisition expenses by net earned insurance and reinsurance premiums.

⁽³⁾The other underwriting expense ratio is calculated by dividing other underwriting expenses by net earned insurance and reinsurance premiums.

⁽⁴⁾The combined ratio is calculated by combining the loss ratio, the acquisition expense ratio, and the other underwriting expense ratio.

Underwriting Results

Three months ended March 31, 2020 and 2019:

Gross written premiums increased 55% to $262 million for the three months ended March 31, 2020 from $169 million for the three months ended March 31, 2019 due to higher writings for risks primarily originating from the U.S. Net written premiums increased 49% to $201 million for the three months ended March 31, 2020 from $135 million for the three months ended March 31, 2019 due the same reasons as the gross written premiums increase.

Global A&H produced a net combined ratio of 100% for the three months ended March 31, 2020 compared to 101% for the three months ended March 31, 2019. The three months ended March 31, 2020 included COVID-19 losses, net of reinsurance, of $14 million (12 points). Net favorable prior year loss reserve development was $4 million (3 points) for the three months ended March 31, 2020 compared to net unfavorable prior year loss reserve development of $5 million (5 points) for the three months ended March 31, 2019.

Underwriting income, including net service fee income, for Global A&H was $10 million for the three months ended March 31, 2020 compared to $12 million for the three months ended March 31, 2019. The decrease of $2 million was driven by COVID-19 losses and lower net service fee income, partially offset by favorable loss reserve development for the three months ended March 31, 2019. Within the segment, underwriting profits from the primary medical and reinsurance books were partially offset by underwriting losses in worldwide travel. For the three months ended March 31, 2020 and 2019, underwriting income, including net service fee income included net losses of $2 million and $1 million, respectively, relating to ArmadaHealth,LLC.

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U.S. Specialty

U.S. Specialty consists of Sirius Group's specialty insurance product offerings, which includes Environmental, Surety, and Workers’ Compensation. In April 2020, the Company decided to exit the Surety business due to competitive market conditions in that business line. In addition, the recent economic downturn presents new risks and challenges for this line of business.

	Three months ended March 31,
U.S. Specialty (Millions)	2020			2019
Gross written premiums	$	20.8		$	16.6
Net written premiums	15.2			13.6
Net earned insurance premiums	12.8			4.1
Loss and allocated LAE	(7.7		)	(2.4		)
Insurance acquisition expenses	(3.0		)	(0.7		)
Technical profit	$	2.1		$	1.0
Unallocated LAE	(0.1		)	—
Other underwriting expenses	(5.2		)	(2.8		)
Underwriting (loss)	$	(3.2	)	$	(1.8	)
Ratios:
Loss ratio(1)	60.9		%	58.5		%
Acquisition expense ratio(2)	23.4		%	17.1		%
Other underwriting expense ratio(3)	40.6		%	68.3		%
Combined ratio(4)	124.9		%	143.9		%

⁽¹⁾The loss ratio is calculated by dividing the sum of loss and allocated LAE and unallocated LAE expenses by net earned insurance premiums.

⁽²⁾The acquisition expense ratio is calculated by dividing insurance acquisition expenses by net earned insurance premiums.

⁽³⁾The other underwriting expense ratio is calculated by dividing other underwriting expenses by net earned insurance premiums.

⁽⁴⁾The combined ratio is calculated by combining the loss ratio, the acquisition expense ratio, and the other underwriting expense ratio.

Underwriting Results

Three months ended March 31, 2020 and 2019:

Gross written premiums increased 24% to $21 million for the three months ended March 31, 2020 from $17 million for the three months ended March 31, 2019 due primarily to an increase in Workers' Compensation ($4 million). Net written premiums increased 7% to $15 million for the three months ended March 31, 2020 from $14 million for the three months ended March 31, 2019 due to an increase in Workers' Compensation ($2 million).

U.S. Specialty recorded an underwriting (loss) of $(3) million for the three months ended March 31, 2020 compared to an underwriting (loss) of $(2) million for the three months ended March 31, 2019.

U.S. Specialty gross written premiums

	Three months ended March 31,
U.S. Specialty (Millions)	2020		2019
Workers' Compensation	$	14.8	$	11.1
Environmental	5.1		4.4
Surety	0.9		1.1
Total	$	20.8	$	16.6

Three months ended March 31, 2020 and 2019:

Gross written premiums increased 24% to $21 million for the three months ended March 31, 2020 from $17 million for the three months ended March 31, 2019 due primarily to an increase in Workers' Compensation ($4 million).

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U.S. Specialty net earned insurance premiums

	Three months ended March 31,
U.S. Specialty (Millions)	2020		2019
Workers' Compensation	$	9.8	$	2.4
Environmental	1.4		0.6
Surety	1.6		1.0
Total	$	12.8	$	4.0

Three months ended March 31, 2020 and 2019:

Net earned insurance premiums increased 225% to $13 million for the three months ended March  31, 2020 from $4 million for the three months ended March 31, 2019 due primarily to an increase in Workers' Compensation ($8 million).

Runoff & Other

Runoff & Other consists of the results of Sirius Global Solutions, which specializes in the acquisition and management of runoff liabilities for insurance and reinsurance companies, both in the United States and internationally, as well as asbestos risks, environmental risks and other long-tailed liability exposures.

	Three months ended March 31,
Runoff & Other (Millions)	2020			2019
Gross written premiums	$	69.4		$	1.4
Net written premiums	68.6			0.4
Net earned insurance and reinsurance premiums	69.0			0.4
Loss and allocated LAE	(68.9		)	(1.1		)
Insurance and reinsurance acquisition expenses	(0.4		)	(0.7		)
Technical (loss)	$	(0.3	)	$	(1.4	)
Unallocated LAE	(0.8		)	(0.5		)
Other underwriting expenses	(0.9		)	(2.1		)
Underwriting (loss)	$	(2.0	)	$	(4.0	)
General and administrative expenses	(1.5		)	(0.8		)
Underwriting (loss), net of service fee income	$	(3.5	)	$	(4.8	)

Underwriting Results

Three months ended March 31, 2020 and 2019:

Runoff & Other recorded $69 million of gross written premiums for the three months ended March31, 2020 compared to $1 million of gross written premiums for the three months ended March 31, 2019. The increase from the prior period was due to premiums from the LPT. The LPT did not have an impact on net underwriting results as net earned insurance and reinsurance premiums were offset by a corresponding losses incurred amount. See "Overview - Background and Recent Developments, Loss Portfolio Transfer" for further details on the LPT.

Runoff & Other recorded an underwriting (loss) of $(4) million for the three months ended March 31, 2020 compared to an underwriting (loss) of $(5) million for the three months ended March 31, 2019.

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Reinsurance Protection

The following tables display Sirius Group's underwriting ratios prior to cessions to reinsurers ("Gross"), cessions to reinsurers ("Ceded"), and after cessions to reinsurers ("Net") basis.

Three months ended March 31, 2020 and 2019

	Three months ended March 31, 2020
	Global Reinsurance	Global A&H	U.S. Specialty	Total
Gross ratios:
Loss ratio	107.8%	72.1%	56.4%	96.3%
Acquisition expense ratio	21.7%	24.9%	21.5%	18.0%
Other underwriting expense ratio	7.2%	3.6%	37.7%	7.1%
Gross Combined ratio	136.7%	100.6%	115.6%	121.4%
Ceded ratios:
Loss ratio	93.5%	80.0%	—%	87.5%
Acquisition expense ratio	21.9%	21.2%	—%	21.4%
Ceded Combined ratio	115.4%	101.2%	—%	108.9%
Net ratios:
Loss ratio	111.6%	69.6%	60.9%	98.3%
Acquisition expense ratio	21.7%	26.1%	23.4%	17.2%
Other underwriting expense ratio	9.1%	4.7%	40.6%	8.7%
Net Combined ratio	142.4%	100.4%	124.9%	124.2%

Sirius Group's net combined ratio was 3 points higher than the gross combined ratio primarily due to the costs of retrocessional protections with limited ceded loss recoveries for the three months ended  March 31, 2020, driven mainly by Global Reinsurance.

	Three months ended March 31, 2019
	Global Reinsurance	Global A&H	U.S. Specialty	Total
Gross ratios:
Loss ratio	48.4%	70.5%	56.4%	56.7%
Acquisition expense ratio	23.5%	26.0%	8.1%	21.7%
Other underwriting expense ratio	8.1%	4.7%	56.5%	8.8%
Gross Combined ratio	80.0%	101.2%	121.0%	87.2%
Ceded ratios:
Loss ratio	33.0%	80.1%	n/m	49.3%
Acquisition expense ratio	30.0%	21.1%	n/m	26.4%
Ceded Combined ratio	63.0%	101.2%	n/m	75.7%
Net ratios:
Loss ratio	52.9%	67.3%	58.5%	59.0%
Acquisition expense ratio	21.6%	27.7%	17.1%	20.3%
Other underwriting expense ratio	10.2%	6.3%	68.3%	11.3%
Net Combined ratio	84.7%	101.3%	143.9%	90.6%
n/m = not meaningful

Sirius Group’s net combined ratio was 4 points higher than the gross combined ratio due to the costs of retrocessional protections with limited ceded loss recoveries for the three months ended March 31, 2019, driven mainly by Global Reinsurance.

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Non-GAAP Financial Measures

In presenting Sirius Group’s results, management has included and discussed non-GAAP financial measures:  Operating (loss) income attributable to common shareholders, Adjusted book value, Adjusted book value per share, Adjusted tangible book value, and Adjusted tangible book value per share. The Company believes that these non-GAAP financial measures, which may be defined and calculated differently by other companies, better explain and enhance the understanding of the Company’s results of operations. However, these measures should not be viewed as a substitute for those determined in accordance with GAAP.

Operating (loss) income attributable to common shareholders

The Company uses Operating (loss) income attributable to common shareholders as a measure to evaluate the underlying fundamentals of its operations and believes it to be a useful measure of its core performance. Operating (loss) income attributable to common shareholders as used herein differs from net (loss) income attributable to common shareholders, which the Company believes is the most directly comparable GAAP measure, by the exclusion of net realized and unrealized gains and losses on investments, net foreign exchange gains (losses) and the associated income tax expense or benefit. The Company’s management believes that Operating (loss) income attributable to common shareholders is useful to investors because it is more reflective of the Company’s core business, as it removes the variability arising from fluctuations in the Company’s fixed maturity investment portfolio, equity investments trading, investments-related derivatives, and net foreign exchange gains (losses) and the associated income tax expense or benefit of those fluctuations. The following is a reconciliation of net (loss) income attributable to common shareholders to Operating (loss) income attributable to common shareholders:

(Expressed in millions of U.S. dollars)	Three months ended March 31,
	2020			2019
Net (loss) income attributable to common shareholders	$	(98.1	)	$	95.3
Adjustment for net realized and unrealized (gains) losses on investments	23.5			(83.0		)
Adjustment for net foreign exchange (gains) losses	(18.5		)	(5.1		)
Adjustment for income tax expense (benefits) (1)	(7.2		)	11.7
Operating (loss) income attributable to common shareholders	$	(100.3	)	$	18.9

⁽¹⁾Adjustment for income tax expense (benefits) represents the income tax expense (benefits) associated with the adjustment for net realized and unrealized losses (gains) on investments and the income tax expense (benefits) associated with the adjustment for net foreign exchange gains (losses). The income tax impact is estimated by applying the statutory rates of applicable jurisdictions, after consideration of other relevant factors.

Adjusted book value, Adjusted book value per share, Adjusted tangible book value, and Adjusted tangible book value per share

Adjusted book value, Adjusted book value per share, Adjusted tangible book value, and Adjusted tangible book value per share are non-GAAP financial measures. Adjusted book value and Adjusted book value per share are used to show the Company’s total worth on a per-share basis and are useful to management and investors in analyzing the intrinsic value of the Company. Adjusted tangible book value and Adjusted tangible book value per share are useful to investors because they measure the realizable value of shareholder returns, excluding the impact of goodwill, intangible assets, and net deferred liability on intangible assets.

Adjusted shares outstanding is derived by summing Common shares outstanding, Series B preference shares outstanding, and the earned portion of share-based compensation awards. Adjusted book value is derived by summing Total common shareholders’ equity, the Series B preference share amount reflected in mezzanine equity, and the Earned portion of future proceeds from stock option awards. Outstanding warrants are excluded as they are anti-dilutive as of the respective reporting dates. Adjusted tangible book value is derived by subtracting Goodwill, Intangible assets and Net deferred tax liability on intangible assets from Adjusted book value.

At March 31, 2020, Adjusted book value, Adjusted book value per share, Adjusted tangible book value, and Adjusted tangible book value per share include the earned effects of share-based compensation awards issued during 2019. 

Adjusted book value per share is derived by dividing the Adjusted book value by the Adjusted shares outstanding. Adjusted tangible book value per share is derived by dividing Adjusted tangible book value by the Adjusted shares outstanding.

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The reconciliation to Total common shareholders’ equity and Book value per common share, the most directly comparable GAAP measures, are presented in the table below.

	March 31,			December 31,
(Expressed in millions of U.S. dollars, except share and per share amounts)	2020			2019
Common shares outstanding	115,299,341			115,299,341
Series B preference shares outstanding	11,901,670			11,901,670
Earned share-based compensation awards, excluding stock options	785,297			629,716
Earned portion of Stock option awards issued	496,508			381,929
Adjusted shares outstanding	128,482,816			128,212,656
Total common shareholders’ equity	$	1,474.1		$	1,640.4
Series B preference shares	199.6			223.0
Earned portion of future proceeds from stock option awards	6.3			4.9
Adjusted book value	$	1,680.0		$	1,868.3
Goodwill	(400.8		)	(400.8		)
Intangible assets	(175.9		)	(179.8		)
Net deferred tax liability on intangible assets	21.2			22.8
Adjusted tangible book value	$	1,124.5		$	1,310.5
Book value per common share	$	12.78		$	14.23
Adjusted book value per share	$	13.08		$	14.57
Adjusted tangible book value per share	$	8.75		$	10.22

Liquidity and Capital Resources

Liquidity is a measure of a company's ability to generate cash flows sufficient to meet short-term and long-term cash requirements of its business operations. Sirius Group's insurance and reinsurance operations are subject to regulation and supervision in each of the jurisdictions where they are domiciled and licensed to conduct business. Generally, regulatory authorities have broad supervisory and administrative powers over such matters as licenses, standards of solvency, premium rates, policy forms, investments, security deposits, methods of accounting, form and content of financial statements, reserves for unpaid loss and LAE, reinsurance, minimum capital and surplus requirements, dividends and other distributions to shareholders, periodic examinations and annual and other report filings. In general, such regulation is for the protection of policyholders rather than shareholders. Sirius Group manages its liquidity needs primarily through the maintenance of a short duration and high quality fixed income portfolio.

To date, the COVID-19 pandemic has not materially impacted our ability to meet the liquidity requirements of our business and has not affected our ability to meet regulatory capital requirements or our ability to meet other contractual commitments.

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Dividend Capacity

Sirius Group's top tier regulated insurance and reinsurance operating subsidiary is Sirius Bermuda. Sirius Bermuda's ability to pay dividends is limited under Bermuda law and regulations. Under the Insurance Act 1978, Sirius Bermuda is restricted with respect to the payment of dividends. Sirius Bermuda is prohibited from declaring or paying in any financial year dividends of more than 25% of its total statutory capital and surplus (as shown on its previous financial year's statutory balance sheet) unless it files, at least seven days before payment of such dividends, with the Bermuda Monetary Authority ("BMA") an affidavit stating that it will continue to meet the required margins following the declaration of those dividends. As of December 31, 2019, Sirius Bermuda could pay approximately $524 million to its parent company, Sirius International Group, Ltd., during 2020. Sirius Bermuda indirectly owns Sirius International, Sirius America and Sirius Group's other insurance and reinsurance operating companies, each of which are limited in their ability to pay dividends by the insurance laws of their relevant jurisdictions. CMIG International, which is approximately 82% owned by China Minsheng Investment Group Corp., Ltd. ("CMIG"), indirectly holds approximately 87% of the voting control over the Sirius Group equity securities as of March 31, 2020, through CMIG International's wholly-owned Bermuda holding company, CM Bermuda Ltd. ("CM Bermuda"). During 2019, CMIG made several public announcements relating to defaults and cross-defaults on certain bonds and other debt obligations issued by certain subsidiaries of CMIG (the "CMIG Defaults"), the failure and uncertainty of CMIG's subsidiaries to repay their debt obligations as they become due and the existence of certain asset freeze orders relating to the equity interests of CMIG in certain Chinese subsidiaries not within the chain of control of Sirius Group. On May 3, 2019, in connection with the CMIG Defaults, Sirius Bermuda and Sirius Group entered into a voluntary undertaking with the BMA to provide further comfort to the BMA as the group supervisor of Sirius Group and primary regulator of Sirius Bermuda, the designated insurer for group supervisory purposes regarding the potential risks to Sirius Group in connection with the CMIG Defaults. On March 27, 2020, Sirius Group extended the voluntary undertaking for an additional year. Pursuant to the voluntary undertaking, each of Sirius Group and Sirius Bermuda have agreed, until May 3, 2021, (a) to provide ten days prior written notice to the BMA prior to declaring any dividend or capital distribution, which notice shall include an affidavit confirming that the declaration and payment of such dividend would not be in breach of (i) the provisions of section 54 of the Companies Act 1981 in the case of Sirius Bermuda, (ii) the Minimum Liquidity Ratio as defined in the Insurance Act 1978 in the case of Sirius Bermuda; and (iii) the Target Capital Level of 120% of the Enhanced Capital Requirement as defined by the Bermuda Solvency Capital Requirement promulgated by the BMA for Sirius Group and Sirius Bermuda, and a summary description of the use proceeds from such declaration or dividend or capital distribution within Sirius Group or Sirius Bermuda; (b) not to enter into any guarantees, keepwells, loans or other financial arrangements between Sirius Group and CMIG, or provide any credit support with respect to any obligations of CMIG; and (c) not to enter into any related party transaction with CMIG. For the three months ended March 31, 2020, Sirius Bermuda paid $70 million of dividends to its immediate parent.

Sirius International has the ability to pay dividends to its immediate parent subject to the availability of unrestricted equity, calculated in accordance with the Swedish Act on Annual Accounts in Insurance Companies and the Swedish Financial Supervisory Authority (the "SFSA"). Unrestricted equity is calculated on a consolidated group account basis and on a parent account basis. Differences between the two include but are not limited to accounting for goodwill, subsidiaries (with parent accounts stated at original foreign exchange rates), taxes and pensions. Sirius International's ability to pay dividends is limited to the "lower of" unrestricted equity as calculated within the group and parent accounts. As of December 31, 2019, Sirius International had $402 million (based on the December 31, 2019 SEK to USD exchange rate) of unrestricted equity on a parent account basis (the lower of the two approaches) available to pay dividends in 2020. The amount of dividends available to be paid by Sirius International in any given year is also subject to cash flow and earnings generated by Sirius International's business, the maintenance of adequate solvency capital ratios for Sirius International and the consolidated Sirius International UK Holdings Ltd. group, as well as dividends received from its subsidiaries. Earnings generated by Sirius International's business that are allocated to the Safety Reserve are not available to pay dividends (see "Safety Reserve" below). For the three months ended March 31, 2020, Sirius International did not declare a dividend and paid less than $1 million of dividends declared prior to 2018.

Under the normal course of business, Sirius America has the ability to pay dividends to its immediate parent during any twelve-month period without the prior approval of regulatory authorities in an amount set by a formula based on the lesser of net investment income, as defined by statute, or 10% of statutory surplus, in both cases as most recently reported to regulatory authorities, subject to the availability of earned surplus and subject to dividends paid in prior periods. Based on this formula, Sirius America has ordinary dividend capacity as of March 31, 2020, without prior regulatory approval. As of December 31, 2019, Sirius America had $522 million of statutory surplus and $89 million of earned surplus. For the three months ended March 31, 2020, Sirius America did not pay any dividends to its immediate parent.

For the three months ended March 31, 2020, Sirius Group did not pay any dividends. As of March 31, 2020, Sirius Group had $94 million of net unrestricted cash, short-term investments, and fixed maturity investments outside of its regulated and unregulated insurance and reinsurance operating subsidiaries.

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Safety Reserve

Subject to certain limitations under Swedish law, Sirius International is permitted to transfer pre-tax income amounts into a reserve referred to as a "Safety Reserve." Under local statutory requirements, an amount equal to the deferred tax liability on Sirius International's Safety Reserve is included in Solvency Capital. Access to the Safety Reserve is restricted to cover insurance and reinsurance losses and to cover a breach of the Solvency Capital Requirement. Access for any other purpose requires the approval of Swedish regulatory authorities. Similar to the approach taken by Swedish regulatory authorities, most major rating agencies generally include the balance of the Safety Reserve, without any provision for deferred taxes, in Sirius International's regulatory capital when assessing Sirius International and Sirius Group's financial strength.

As of March 31, 2020, Sirius International's Safety Reserve amounted to SEK 10.2 billion, or $1.0 billion (based on the March 31, 2020 SEK to USD exchange rate). Under Swedish GAAP, an amount equal to the Safety Reserve, net of a related deferred tax liability established at the Swedish tax rate, is classified as common shareholders' equity. Generally, this deferred tax liability ($210 million based on the March 31, 2020 SEK to USD exchange rate) is only required to be paid by Sirius International if it fails to maintain prescribed levels of premium writings and loss reserves in future years. As a result of the indefinite deferral of these taxes, the related deferred tax liability is not taken into account by Swedish regulatory authorities for purposes of calculating Solvency Capital under Swedish insurance regulations.

Pursuant to tax legislation effective as of January 1, 2019, the tax rate applicable to Swedish corporations decreased to 21.4%, and then will further reduce to 20.6% starting in 2021. The tax legislation also introduced an annual tax on the Safety Reserve effective as of January 1, 2019. This provision adds additional taxable income for the Company annually. The calculation applies the Government Borrowing Rate (with a floor rate of +0.5%) to the Safety Reserve balance at the beginning of the year. At the current year tax rate of 21.4% the additional tax expense for the three months ended March 31, 2020 is SEK 2.7 million, or $0.3 million (based on the March 31, 2020 SEK to USD exchange rate).

Further, the enacted legislation also included a new provision treating an amount equal to 6% of the Safety Reserve balance as of January 1, 2021, as additional taxable income in tax year 2021 only, subject to tax at the applicable 20.6% rate. Based on this provision and Sirius International's Safety Reserve balance as of March 31, 2020, Sirius International has recorded an additional deferred tax liability as of March 31, 2020 in the amount of SEK 126 million, or $13 million (based on the March 31, 2020 SEK to USD exchange rate).

Insurance Float

Insurance float is an important aspect of Sirius Group's insurance and reinsurance operations. Insurance float represents funds that an insurance or reinsurance company holds for a limited time. In an insurance or reinsurance operation, float arises because premiums are collected before losses are paid. This interval can extend over many years. During that time, the insurer or reinsurer invests the funds. When the premiums that an insurer or reinsurer collects do not cover the losses and expenses it eventually must pay, the result is an underwriting loss, which can be considered as the cost of insurance float.

Insurance float can increase in a number of ways, including through acquisitions of insurance and reinsurance operations, organic growth in existing insurance and reinsurance operations and recognition of losses that do not immediately cause a corresponding reduction in investment assets. Conversely, insurance float can decrease in a number of other ways, including sales of insurance and reinsurance operations, shrinking or runoff of existing insurance and reinsurance operations, the acquisition of operations that do not have substantial investment assets (e.g., an agency) and the recognition of gains that do not cause a corresponding increase in investment assets. It is Sirius Group's intention to generate low-cost float over time through a combination of acquisitions and organic growth in its existing insurance and reinsurance operations.

Certain operational leverage metrics can be measured with ratios that are calculated using insurance float. There are many activities that do not change the amount of insurance float at an insurance or reinsurance company but can have a significant impact on Sirius Group's operational leverage metrics. For example, investment gains and losses, foreign currency translation gains and losses, debt issuances and repurchases/repayments, common and preference share issuances and repurchases and dividends paid to shareholders are all activities that do not change insurance float but can meaningfully impact operational leverage metrics that are calculated using insurance float. Insurance float increased by $155 million from December 31, 2019 mainly due to losses incurred from COVID-19 for the three months ended March 31, 2020.

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The following table illustrates Sirius Group's consolidated insurance float position as of March 31, 2020 and December 31, 2019:

(Expressed in millions of U.S. dollars, except multiples)	March 31, 2020			December 31, 2019
Loss and LAE reserves	$	2,519.6		$	2,331.5
Unearned insurance and reinsurance premiums	979.2			708.0
Ceded reinsurance payable	332.8			244.7
Funds held under reinsurance treaties	148.0			169.1
Deferred tax liability on safety reserve	222.5			239.4
Float liabilities	4,202.1			3,692.7
Cash	140.5			136.3
Reinsurance recoverable on paid and unpaid losses	529.9			484.2
Insurance and reinsurance premiums receivable	964.2			730.1
Funds held by ceding companies	260.5			293.9
Deferred acquisition costs	168.2			148.2
Ceded unearned insurance and reinsurance premiums	245.5			162.0
Float assets	2,308.8			1,954.7
Insurance float	$	1,893.3		$	1,738.0
Insurance float as a multiple of total capital(1)	0.8		x	0.7		x
Insurance float as a multiple of Sirius Group's common shareholders' equity	1.3		x	1.1		x

⁽¹⁾See calculation of total capital in the table below under "Financing."

Financing

Sirius Group can provide no assurance that, if needed, it would be able to obtain additional debt or equity financing on satisfactory terms, if at all. In particular, as discussed in Item 1A, "Risk Factors," in our 2019 Annual Report, the CMB Resolution (as defined therein) may prohibit our Board of Directors from issuing any common or preference shares, warrants, options or other forms of share equity, or to confer any new share rights or implement any rights plan, or to amend or vary or alter any rights attaching to any existing shares, in each case without the prior approval of holders of the common shares of the Company representing at least 75% of the shareholder voting rights. The approval of holders of the common shares of the Company representing at least 75% of the shareholder voting rights cannot be assured. As such, the CMB Resolution may prevent Sirius Group from performing a number of matters necessary to the operation of its business, including raising capital, even if necessary to meet regulatory or rating agency capital requirements, to finance its operations or to increase its public float, as well as incentivizing employees using shares of the Company, and completing equity-based financing of transactions without the prior approval of holders of the common shares of the Company representing at least 75% of the shareholder voting rights.

The following table summarizes Sirius Group's capital structure as of March 31, 2020 and December 31, 2019:

(Expressed in millions of U.S. dollars, except ratios)	March 31, 2020			December 31, 2019
2017 SEK Subordinated Notes	$	270.6		$	291.2
2016 SIG Senior Notes	394.2			394.0
Total debt	664.8			685.2
Series B preference shares	199.6			223.0
Common shareholders' equity	1,474.1			1,640.4
Total capital	$	2,338.5		$	2,548.6
Total debt to total capital	28		%	27		%
Total debt and Series B preference shares to total capital	37		%	36		%

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2017 SEK Subordinated Notes

On September 22, 2017, Sirius Group issued floating rate callable subordinated notes denominated in SEK in the amount of SEK 2,750 million (or $346 million on date of issuance) at a 100% issue price ("2017 SEK Subordinated Notes"). The 2017 SEK Subordinated Notes were issued in an offering that was exempt from the registration requirements of the Securities Act of 1933 (the "Securities Act"). The 2017 SEK Subordinated Notes bear interest on their principal amount at a floating rate equal to the applicable Stockholm Interbank Offered Rate ("STIBOR") for the relevant interest period plus an applicable margin, payable quarterly in arrears on March 22, June 22, September 22, and December 22 in each year commencing on December 22, 2017, until maturity in September 2047. A portion of the proceeds were used to fully redeem the outstanding $250 million Sirius International Group, Ltd. Preference Shares.

See Note 10 "Debt and standby letters of credit facilities" and Note 14 "Common shareholder's equity, mezzanine equity, and non-controlling interests" in Sirius Group's unaudited financial statements included elsewhere in this Quarterly Report on Form 10-Q for further details and discussion with respect to the 2017 SEK Subordinated Notes.

2016 SIG Senior Notes

On November 1, 2016, Sirius Group issued $400 million face value of senior unsecured notes ("2016 SIG Senior Notes") at an issue price of 99.209% for net proceeds of $392 million after taking into effect both deferrable and non-deferrable issuance costs. The 2016 SIG Senior Notes were issued in an offering that was exempt from the registration requirements of the Securities Act. The 2016 SIG Senior Notes bear an annual interest rate of 4.6%, payable semi-annually in arrears on May 1, and November 1, in each year commencing on May 1, 2017, until maturity in November 2026.

See Note 10 "Debt and standby letters of credit facilities" in Sirius Group's audited financial statements included elsewhere in this Quarterly Report on Form 10-Q for further details and discussion with respect to the 2016 SIG Senior Notes.

Series B Preference Shares

In connection with the closing of the merger of Sirius Group with Easterly Acquisition Corp. (the “Merger”) on November 5, 2018, Sirius Group issued 11,901,670 of the 15,000,000 authorized Series B preference shares, with a par value of $0.01 per share, to affiliated funds of Gallatin Point Capital, The Carlyle Group, Centerbridge Partners, L.P. and Bain Capital Credit (collectively, the "Preference Share Investors") as part of the private placement of Series B preference shares, common shares, and warrants in connection with the Merger. The Series B preference shares contain both a mandatory conversion and optional redemption features, with the optional redemption features allowing for settlement in either common shares or cash. Sirius Group accounts for the Series B preference shares outside of permanent equity as mezzanine equity in the Consolidated Balance Sheets as its ability to settle in common shares cannot be assured, and thus we presume that Sirius Group will be required to settle the Series B preference shares in cash, as if it were a redemption feature.

The Series B preference shares rank senior to common shares with respect to dividend rights, rights of liquidation, winding-up, or dissolution of the Company and junior to all of the Company's existing and future policyholder obligations and debt obligations. Without the consent of the holders of the Series B preference shares, the Company may not issue any class or series of shares that rank senior or pari passu with the Series B preference shares as to the payment of dividends or as to distribution of assets upon any voluntary or involuntary liquidation, winding-up or dissolution of the Company, if the aggregate gross proceeds from the issuance of all such senior or pari passu shares equals or exceeds $100 million.

The Company adjusts the carrying value of the Series B preference shares to equal the redemption value at the end of each reporting period. As of March 31, 2020 and December 31, 2019, the balance of the Series B preference shares was $200 million and $223 million, respectively.

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In April 2020, the Company received letters from the Preference Share Investors, including Notices of Redemption claiming that there has been a change in control of Sirius Group within the meaning of the Certificate of Designation of the Series B preference shares and demanding the redemption of all of their Series B preference shares. The Company has reviewed the Notices of Redemption and related attachments, and continued its inquiry into the matters asserted therein. In connection with that inquiry, the Company received a letter from CMIG International confirming that (i) CMIG International continues to own 100% of the outstanding equity of CM Bermuda, and there have been no transfers of any shares of CM Bermuda (or CMIG International) and (ii) there have been no transfers of the shares owned by CM Bermuda, in each case since the initial listing of the Company’s common shares in November 2018. In addition, the Company received a secretary’s certificate from CM Bermuda identifying CMIG International as CM Bermuda’s sole shareholder. That certificate also indicated that no lender to CMIG International or to CM Bermuda has declared any event of default or has exercised any of its rights in connection with any event of default, and that neither CMIG International nor CM Bermuda has any outstanding bonds. As a result of such inquiry, Sirius Group responded to the Preference Share Investors that it is not aware of any facts that would support the conclusion that an event has occurred that would result in a change in beneficial ownership of the shares of the Company owned by CM Bermuda that would give rise to a redemption right by the Preference Share Investors. As such, Sirius Group concluded and notified the Preference Share Investors that they are not entitled at this time to elect a redemption of any of their Series B preference shares.

Standby letter of credit facilities

On November 6, 2019, Sirius International agreed to renew two standby letter of credit facility agreements totaling $125 million to provide capital support for Lloyd's Syndicate 1945. The first letter of credit is a $90 million facility with Nordea Bank Abp, London Branch, which is issued on an unsecured basis. The second letter of credit is a $35 million facility with DNB Bank ASA, Sweden Branch, $25 million of which is issued on an unsecured basis. Each facility is renewable annually. The above referenced facilities are subject to various affirmative, negative and financial covenants that the Company considers to be customary for such borrowings, including certain minimum net worth and maximum debt to capitalization standards.

Sirius International has other secured letter of credit and trust arrangements with various financial institutions to support its insurance operations. As of March 31, 2020 and December 31, 2019, these secured letter of credit and trust arrangements were collateralized by pledged assets and assets in trust of SEK 3.4 billion and SEK 3.4 billion, respectively, or $336 million and $363 million, respectively (based on the March 31, 2020 and December 31, 2019 SEK to USD exchange rates). As of March 31, 2020 and December 31, 2019, Sirius America Insurance Company's trust arrangements were collateralized by pledged assets and assets in trust of $48 million and $58 million, respectively. As of March 31, 2020 and December 31, 2019, Sirius Bermuda's trust arrangements were collateralized by pledged assets and assets in trust of $514 million and $784 million, respectively.

Revolving credit facility

In February 2018, Sirius Group, through its indirectly wholly-owned subsidiary SIG entered into a three-year, $300 million senior unsecured revolving credit facility (the "Facility"). The Facility provides access to loans for working capital and general corporate purposes, and letters of credit to support obligations under insurance and reinsurance agreements and retrocessional agreements. The Facility is subject to various affirmative, negative and financial covenants that Sirius Group considers to be customary for such borrowings, including certain minimum net worth, maximum debt to capitalization and financial strength rating standards. As of March 31, 2020, there were no outstanding borrowings under the Facility.

Debt and standby letter of credit facility covenants

As of March 31, 2020, Sirius Group was in compliance with all of the covenants under the 2017 SEK Subordinated Notes, the 2016 SIG Senior Notes, the Nordea Bank Abp, London Branch facility, and the DNB Bank ASA, Sweden Branch facility. In addition, as of March 31, 2020, Sirius Group was in compliance with all of the covenants under the Facility.

Off Balance Sheet Arrangements

Sirius Group is not party to any off-balance sheet transaction, agreement or other contractual arrangement as defined by Item 303(a)(4) of Regulation S-K to which an entity unconsolidated with Sirius Group is a party that management believes is reasonably likely to have a current or future effect on its financial condition, revenues or expenses, results of operations, liquidity, capital expenditures or capital resources that Sirius Group believes is material to investors.

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Contractual Obligations and Commitments

In the normal course of business, we are party to a variety of contractual obligations, summarized as of December 31, 2019 in our 2019 Annual Report. We consider these contractual obligations when assessing our liquidity requirements. During the three months ended March 31, 2020, other than as disclosed in "Note 5. Reserves for unpaid losses and adjustment expenses" in the Notes to Consolidated Financial Statements included within "Part I, Item 1. Financial Statements." with respect to an increase in our reserve for loss and LAE reserves, and "Note 10. Debt and standby letters of credit facilities" in the Notes to Consolidated Financial Statements included within "Part I, Item 1. Financial Statements." with respect to our long term debt obligations, there were no other material changes in our contractual obligations as disclosed in the table of contractual obligations, and related footnotes, included in our 2019 Annual Report.

Cash Flows

Sirius Group primarily derives cash from the net inflow of premiums less claim payments related to underwriting activities, from fee income, and from net investment income. The insurance and reinsurance business inherently provides liquidity, as premiums are received in advance of the time claims are paid. However, the amount of cash required to fund claim payments can fluctuate significantly from period to period, due to the low frequency and high severity nature of certain types of business we write. Sirius Group's remaining cash flows are generally reinvested in our investment portfolio. In addition, as previously disclosed, Sirius Group has access to the $300 million Facility that provides access to loans for working capital and general corporate purposes, and letters of credit to support obligations under insurance and reinsurance agreements and retrocessional agreements.

The following table summarizes our consolidated cash flows from operating, investing, and financing activities for the three months ended March 31, 2020 and 2019.

	Three months ended
(Millions)	March 31, 2020			March 31, 2019
Net cash provided from (used for)(1)
Operations	$	115.2		$	24.6
Investing activities	(102.7		)	(24.1		)
Financing activities	—			(0.1		)
Effect of exchange rate changes on cash	(7.3		)	(3.6		)
Increase (decrease) in cash during year	$	5.2		$	(3.2	)

⁽¹⁾Refer to Consolidated Statements of Cash Flows included in Sirius Group's Unaudited Consolidated Financial Statements included in "Part I, Item 1. Financial Statements."

Cash flows from operations for the three months ended March 31, 2020 and 2019

Net cash provided from operations was $115 million and $25 million for the three months ended March 31, 2020 and 2019, respectively. Cash flows from operations increased $90 million for the three months ended March 31, 2020 compared to the three months ended March 31, 2019 due to higher amounts of net premiums collected, partially offset by net higher net paid losses and acquisition costs.

Long-term compensation items affecting cash flows from operations

For the three months ended March 31, 2020 and 2019, Sirius Group made long-term incentive payments totaling less than $1 million and $2 million, respectively.

For the three months ended March 31, 2020, Sirius Group made retention related award payments totaling $7 million that were issued to key employees in November 2019. See Note 13 "Share-based compensation" in Sirius Group's unaudited financial statements included elsewhere in this Quarterly Report on Form 10-Q for further details and discussion.

Cash flows from investing and financing activities for the three months ended March 31, 2020 and 2019

Cash flows (used for) investing activities were $(103) million and $(24) million for the three months ended March 31, 2020 and 2019, respectively. The increase in cash flows (used for) investing activities was primarily due to higher net purchases of common equity securities.

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Cash flows provided from financing activities were insignificant for the three months ended March 31, 2020 and 2019.

Financing and other capital activities

During both the three months ended March 31, 2020 and 2019, Sirius Group paid $3 million of interest on the 2017 SEK Subordinated Notes.

Summary of Critical Accounting Estimates

Our Consolidated Financial Statements include certain amounts that are inherently uncertain and judgmental in nature. As a result, we are required to make assumptions and best estimates in order to determine the reported values. We consider an accounting estimate to be critical if: (1) it requires that significant assumptions be made in order to deal with uncertainties and (2) changes in the estimate could have a material impact on our results of operations, financial condition or liquidity.

As disclosed in our 2019 Annual Report, we believe that the material items requiring such subjective and complex estimates are our:

Loss and LAE Reserves

Fair Value Measurements

Goodwill

Premiums

Income Taxes

There have been no material changes to the Company's critical accounting estimates for the three months ended March 31, 2020. For additional information regarding our critical accounting estimates, refer to our 2019 Annual Report.

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ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

Sirius Group's consolidated balance sheet includes a substantial amount of assets and liabilities whose fair values are subject to market risk. The term "market risk" refers to the risk of loss arising from adverse changes in interest rates, credit spreads, equity markets prices and other relevant market rates and prices. Due to Sirius Group's sizable investment portfolio, market risk can have a significant effect on Sirius Group's consolidated financial position.

See Part II, Item 1A, "Risk Factors," for changes in Sirius Group's market risk dueto the COVID-19 pandemic.

ITEM 4. CONTROLS AND PROCEDURES

Evaluation of Disclosure Controls and Procedures

We maintain disclosure controls and procedures that are designed to ensure that information required to be disclosed in our reports filed pursuant to the Securities Exchange Act of 1934, as amended (the "Exchange Act"), is recorded, processed, summarized and reported within the time periods specified in the SEC's rules, regulations and related forms, and that such information is accumulated and communicated to our management, including our Chief Executive Officer and Chief Financial Officer, as appropriate, to allow timely decisions regarding required disclosure.

As required by Rules 13a-15(e) and 15d-15(e) under the Exchange Act, Sirius Group's management, with the participation of our Chief Executive Officer and Chief Financial Officer, carried out an evaluation of the effectiveness of our disclosure controls and procedures as of March 31, 2020. Based upon that evaluation, our Chief Executive Officer and Chief Financial Officer concluded that Sirius Group's disclosure controls and procedures are effective in allowing information required to be disclosed in reports filed under the Exchange Act to be recorded, processed, summarized and reported within time periods specified in the rules and forms of the SEC, and that such information is accumulated and communicated to Sirius Group's management, including our Chief Executive Officer and Chief Financial Officer, as appropriate to allow timely decisions regarding required disclosure.

Changes in Internal Control Over Financial Reporting

During the most recently completed fiscal quarter, there have been no changes in our internal control over financial reporting that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

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PART II. OTHER INFORMATION

ITEM 1. LEGAL PROCEEDINGS

Sirius Group, and the insurance and reinsurance industry in general, are routinely subject to claims-related litigation and arbitration in the normal course of business, as well as litigation and arbitration that do not arise from, or are not directly related to, claims activity. Sirius Group estimates of the costs of settling matters routinely encountered in claims activity are reflected in the reserves for unpaid loss and LAE.

We are not a party to any material legal proceedings arising outside the ordinary course of business.

ITEM 1A. RISK FACTORS

We face a variety of risks and uncertainties that are inherent in our business and our industry, including operational, industry and regulatory risks. Such risks and uncertainties could cause our actual results to differ materially from our forward-looking statements, expectations and historical trends. As of the date of this report, there have been no material changes to the risk factors disclosed in Item 1A. "Risk Factors" in our 2019 Annual Report, except as set forth below.

The novel coronavirus (COVID-19) pandemic has adversely affected our business. Epidemics, pandemics, and other public health threats, including the ongoing COVID-19 pandemic, could have a material adverse effect on Sirius Group’s business, including our results of operations, financial position and/or liquidity, in a manner and to a degree that cannot be predicted.

In December 2019, the novel coronavirus(COVID-19)was reported in Wuhan, China, and the World Health Organization declared it a global health emergency on January 30, 2020. Since January 2020, the Company has been monitoring the impact of COVID-19 on Sirius Group's business. Beginning in March 2020, COVID-19 began to impact the global economy and the results of our operations. Because of the size and duration of this pandemic, all of the direct and indirect consequences of COVID-19 are not yet known and may not emerge for some time. The future impact of the pandemic is highly uncertain and cannot be predicted, but it could have a material adverse impact on the future results of operations, financial position and/or liquidity of Sirius Group. The extent of the impact, if any, will depend on future developments, including actions taken to contain COVID-19and the uncertain impact of potential judicial, legislative and regulatory actions by local, state and national governmental and regulatory bodies. Risks presented by the ongoing effects of COVID-19 include the following:

• Gross Written Premiums. We expect that the impact of COVID-19 on general economic activity will negatively impact our premium volumes. The degree of the impact will depend on the extent and duration of the economic contraction. As a result of the anticipated impact of the pandemic on our earned premiums, we expect an increase in our underwriting expense ratio in the near term. Sirius Group may also experience lower gross written premiums for travel medical and trip cancellation insurance.

• Increased Risk of Loss. Sirius Group has experienced and may continue to experience an increased risk of loss in certain lines of business, including contingency, accident and health, workers ' compensation, trade credit, casualty and its property (re)insurance due to business interruption and global supply chains disruptions. For example, Sirius Group has recorded losses of $52 million in its other property and property catastrophe excess reinsurance lines of business due to business interruption, and has experienced losses of $55 million pertaining to actual and projected canceled or postponed major events. Sirius Group may also experience elevated frequency and severity in its workers’ compensation lines related to compensable claims by workers who have suffered from injury or illness in the course of theiremployment. Sirius Group has experienced and may continue to experience risk of loss in its casualty business, including professional liability treaties that cover health care, hospitals, long term care providers and directors and officers. Sirius Group has experienced and may continue to experience losses resulting from mortality, increased medical expenses, and trip cancellation in its accident and health portfolio. The economic volatility may also lead to increased losses within the trade credit portfolio. For further discussion of the risks and exposure related to unpredictable catastrophic events, see “Sirius Group is exposed to unpredictable catastrophic events that could adversely affect its results of operations and financial condition” included in Part I, Item 1A. "Risk Factors” in the Company’s 2019 Annual Report.

• Estimated Loss Reserves. The anticipated and unknown risks related to COVID-19 may cause additional uncertainty in the estimation of claim and claim adjustment expense reserves. For example, the behavior of claimants and policyholders may change in unexpected ways. The disruption to court systems may have an impact on the timing and amounts of claims settlements; and the actions taken by governmental bodies, both legislative and regulatory, in reaction to COVID-19 and their related impacts are difficult to predict. As a result, our estimated level of claims and claim adjustment expense reserves may change.

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• Investments. Sirius Group has experienced losses in its investment portfolio as a result of volatile markets, such as a decline in interest rates, a sharp decline in equity markets and a widening of credit risk spreads for bonds. In addition, the disruption in the financial markets caused by COVID-19 has contributed to net unrealized investment losses, primarily due to the impact of changes in fair value on our equity investments and, to a lesser extent, change in unrealized losses in our fixed-income investment portfolio. Our corporate fixed income portfolio may be adversely impacted by ratings downgrades, increased bankruptcies and credit spread widening in distressed industries, such as energy, gaming, lodging and leisure, autos, airlines and retail. In addition, in recent years, many state and local governments have been operating under deficits or projected deficits. These deficits may be exacerbated by the costs of responding to COVID-19 and reduced tax revenues due to adverse economic conditions. Our investment portfolio also includes residential mortgage-backed securities, commercial mortgage-backed securities and wholly-owned real estate, all of which could be adversely impacted by declines in real estate valuations and/or financial market disruption, including a heightened default risk on the underlying mortgages and on rent receivables. Further disruptions in global financial markets due to the continuing impact of COVID-19 could result in additional net realized investment losses, including potential impairments in our fixed income portfolio. Further disruptions in global financial markets could adversely impact our net investment income in future periods from our non-fixed income investment portfolio. For further discussion of the risks related to our investment portfolio see “Sirius Group’s investment portfolio may suffer reduced returns or losses, which could adversely affect Sirius Group’s results of operations and financial condition. Adverse changes in interest rates, foreign currency exchange rates, equity markets, debt markets or market volatility could result in significant losses to the fair value of Sirius Group’s investment portfolio” and “Unexpected volatility or illiquidity associated with some of Sirius Group’s investments could significantly and negatively affect Sirius Group’s financial results, liquidity and ability to conduct business” included in Part I, Item 1A. "Risk Factors” in the Company’s 2019 Annual Report.

• Inflation. It is possible that changes in economic conditions and steps taken by the federal government and the Federal Reserve in response to COVID-19 could lead to higher inflation than we had anticipated, which could in turn lead to an increase in our loss costs and the need to strengthen claims and claim adjustment expense reserves. These impacts of inflation on loss costs and claims and claim adjustment expense reserves could be more pronounced for those lines of business that require a relatively longer period of time to finalize and settle claims for a given year and, therefore more inflation sensitive. Inflation could also adversely impact our general and administrative expenses. Changes in interest rates caused by inflation affect the carrying value of our fixed maturity investments and returns on our fixed maturity and short-term investments. An increase in interest rates reduces the market value of existing fixed maturity investments, thereby negatively impacting our book value.

• Foreign Currency Exchange Rate Changes. As a result of our business outside of the United States, primarily in Europe, Japan, and the United Kingdom (including Lloyd’s), our shareholders' equity is also subject to the effects of changes in foreign currency exchange rates. Movement of the U.S. dollar compared to other currencies could result in a further reduction of shareholders’ equity.

• Further Ratings Downgrades. Third-party rating agencies assess and rate the financial strength, including claims-paying ability, of insurers and reinsurers. These ratings are based upon criteria established by the rating agencies and are subject to revision at any time at the sole discretion of the agencies. Rating agencies periodically evaluate Sirius Group to confirm that it continues to meet the criteria of the ratings previously assigned to Sirius Group. If the rating agencies determine that Sirius Group's operating performance has further deteriorated as a result of the COVID-19 pandemic, they could downgrade or withdraw Sirius Group's financial strength ratings which could have a material adverse effect on our results of operations, financial position and/or liquidity. For additional discussion on how a ratings downgrade can impact Sirius Group see,"Sirius Group is reliant on financial strength and creditworthiness ratings, and any downgrade or withdrawal of ratings and/or change in outlook may have a material adverse effect on Sirius Group's business, prospects, financial condition and results from operations" included in Part I, Item 1A. "Risk Factors” in the Company’s 2019 Annual Report.

• Counterparty Credit Risk. A prolongedeconomic downturn due to the COVID-19 pandemic would increase our credit risk, reflecting our counterparty dealings with agents, brokers, customers and retrocessionaires. For a further discussion, see “Sirius Group’s reliance on intermediaries subjects it to the intermediaries’ credit risk” included in Part I, Item 1A. "Risk Factors” in the Company’s 2019 Annual Report.

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• Potential Adverse Judicial, Legislative and/or Regulatory Action. Like many reinsurers and insurers, we have exposure to losses from the COVID-19 related claims, primarily in our property and contingency business. Whether the COVID-19 pandemic triggers coverage is dependent on specific policy language, terms and exclusions. However, certain domestic and international governmental authorities and regulatory bodies have proposed to take actions to address and contain the impact of the COVID-19 pandemic that may adversely affect Sirius Group. For example, we are subject to government and/or regulatory action that may seek to retroactively mandate coverage for losses which our (re)insurance policies were not designed or priced to cover. Currently, in some countries there is proposed legislation to require (re)insurers to cover business interruption claims irrespective of terms, exclusions or other conditions included in the policies that would otherwise preclude coverage. Should such proposed regulations and or legislation be implemented, our (re)insurance contracts may be interpreted to provide coverage for these business interruption losses, notwithstanding the fact that such losses fall outside of the terms and conditions of the underlying contracts. These and other future judicial, legislative or regulatory actions could have a material adverse impact on our results of operations, financial position and/ or liquidity and make it difficult to predict the total amount of losses we could incur as a result of the COVID-19 pandemic. In addition, a number of states in the United States have instituted, and others are considering instituting, changes designed to effectively expand workers' compensation coverage by creating presumptions of compensability of claims for certain types of workers. Regulatory restrictions or requirements could also impact pricing, risk selection and our rights and obligations with respect to our policies and insureds, including Sirius Group’s ability to cancel policies or Sirius Group’s right to collect premiums. In the United States, at least one state regulator has issued an order requiring insurers to issue premium refunds, and regulators in other states could take similar actions.

• Operational Disruptions and Heightened Cybersecurity Risks. Sirius Group’s operations could be disrupted if key members of our senior management or a significant percentage of our workforce or the workforce of our agents, brokers, suppliers or third party providers are unable to continue to work because of illness, death, government directives or otherwise. In addition, the interruption of our, or their, system capabilities could result in a deterioration of our ability to write and process new and renewal business, provide customer service, pay claims in a timely manner or perform other necessary business functions. Having shifted to remote working arrangements, we also face a heightened risk of cybersecurity attacks or data security incidents and are more dependent on internet and telecommunications access and capabilities. An extended period of remote work arrangements could strain our business continuity plans and could negatively affect our internal control over financial reporting as most of our employees are required to work from home. As a result, new processes, procedures and controls could be required to respond to changes in our business environment. For a further discussion, see “Sirius Group may be unable to adequately maintain its systems and safeguard the security of the data it holds or the data held by its business partners and service providers, which may adversely impact Sirius Group’s ability to operate its business and cause reputational harm and financial loss” included in Part I, Item 1A. "Risk Factors” in the Company’s 2019 Annual Report.

Due to the evolving and uncertain nature of the COVID-19 pandemic, we cannot estimate its ultimate impact at this time. Depending on the scope and duration of the COVID-19 pandemic, the events described above may have a material adverse effect on our results of operations, financial position and/ or liquidity. Moreover, the potential effects of the COVID-19 pandemic could exacerbate the impacts of many other risk factors that we identify in the Company's 2019 Annual Report, including, but not limited to, risks that can impact Sirius Group as a result of an economic downturn; potential litigation claims brought against the Company; further losses from event cancellations in our contingency portfolio and other coverages from our reinsurance and insurance contracts; negative impact to revenues and earnings; and impairment of goodwill and intangible assets and potential valuation allowances on deferred tax assets. Since the COVID-19 pandemic is continuously evolving, the potential impacts to the risks related to our business that are further described in the Company's 2019 Annual Report remain uncertain and new and potentially unforeseen risks beyond those described above and in the Company's 2019 Annual Report may arise. Even after the COVID-19 pandemic subsides, the U.S. and world economies may experience a prolonged economic recession, in which event our results of operations, financial position and/ or liquidity may be materially and adversely affected.

ITEM 2. UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS

None.

ITEM 3. DEFAULTS UPON SENIOR SECURITIES

None.

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ITEM 4. MINE SAFETY DISCLOSURES

Not applicable.

ITEM 5. OTHER INFORMATION

None.

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ITEM 6. EXHIBITS

3.1	Memorandum of Association of Sirius International Insurance Group, Ltd, as amended. (incorporated by reference to Exhibit 3.1 to the Annual Report on Form 10-K filed by Sirius International Insurance Group, Ltd. on March 14, 2019).
3.2	Bye-Laws of Sirius International Insurance Group, Ltd. (incorporated by reference to Exhibit 3.1 to the Current Report on Form 8-K filed by Sirius International Insurance Group, Ltd. on November 6, 2018).
3.3	Certificate of Designation of Series B Preference Shares of Sirius International Insurance Group, Ltd. (incorporated by reference to Exhibit 3.2 to the Current Report on Form 8-K filed by Sirius International Insurance Group, Ltd. on November 6, 2018).
10.1	Form of Director and Officer Indemnification Agreement.
10.9.1	Sirius International Insurance Group, Ltd. 2018 Omnibus Incentive Plan- Form of Restricted Share Unit Award Notice.
10.9.2	Sirius International Insurance Group, Ltd. 2018 Omnibus Incentive Plan- Form of Performance Share Unit Award Notice.
31.1	Certification of Kernan "Kip" V. Oberting, Chief Executive Officer of Sirius International Insurance Group, Ltd., pursuant to Rule 13a-14(a) or Rule 15d-14(a) of the Securities Exchange Act of 1934.
31.2	Certification of Ralph Salamone, Chief Financial Officer of Sirius International Insurance Group, Ltd., pursuant to Rule 13a-14(a) or Rule 15d-14(a) of the Securities Exchange Act of 1934.
32.1	Certification of Kernan "Kip" V. Oberting, Chief Executive Officer of Sirius International Insurance Group, Ltd., pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
32.2	Certification of Ralph Salamone, Chief Financial Officer of Sirius International Insurance Group, Ltd., pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
101.INS	XBRL Instance Document
101.SCH	XBRL Taxonomy Extension Schema Document
101.CAL	XBRL Taxonomy Extension Calculation Linkbase Document
101.LAB	XBRL Taxonomy Extension Label Linkbase Document
101.PRE	XBRL Taxonomy Extension Presentation Linkbase Document
101.DEF	XBRL Taxonomy Extension Definition Linkbase Document

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SIGNATURES

Pursuant to the requirements 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.

	SIRIUS INTERNATIONAL INSURANCE GROUP, LTD. (Registrant)
Date: May 13, 2020	By:	/s/ KERNAN "KIP" V. OBERTING
		Kernan "Kip" V. Oberting President and Chief Executive Officer (Principal Executive Officer)
Date: May 13, 2020	By:	/s/ RALPH A. SALAMONE
		Ralph A. Salamone Chief Financial Officer (Principal Financial Officer & Principal Accounting Officer)

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EX-10.1

Exhibit 10.1

DIRECTOR AND OFFICER

INDEMNIFICATION AGREEMENT

THIS INDEMNIFICATION AGREEMENT (this “Agreement”) is entered into as of the ______ day of ___________, 20___, by and between Sirius International Insurance Group, Ltd., a Bermuda exempted limited liability company (the “Company”), and ____________________ (“Indemnitee”).

RECITALS

A.The Company is aware that competent and experienced persons are increasingly reluctant to serve or continue serving as directors or officers of companies unless they are protected by comprehensive liability insurance and adequate indemnification due to the increased exposure to litigation costs and risks resulting from service to such companies.

B.The statutes and judicial decisions regarding the duties of directors and officers are often insufficient to provide directors and officers with adequate, reliable knowledge of the legal risks to which they are exposed or the manner in which they are expected to execute their fiduciary duties and responsibilities.

C.The Company and the Indemnitee recognize that plaintiffs often seek damages in such large amounts, and the costs of litigation may be so great (whether or not the claims are meritorious), that the defense and/or settlement of such litigation can create an extraordinary burden on the personal resources of directors and officers.

D.The board of directors of the Company has concluded that, to attract and retain competent and experienced persons to serve as directors and officers of the Company, it is not only reasonable and prudent but necessary to promote the best interests of the Company and its shareholders for the Company to contractually indemnify its directors and certain of its officers in the manner set forth herein, and to assume for itself liability for expenses and damages in connection with claims against such directors and officers in connection with their service to the Company as provided herein.

E. The Company desires and has requested the Indemnitee to serve or continue to serve as a director and/or officer of the Company, and the Indemnitee is willing to serve, or to continue to serve, as a director and/or officer of the Company if the Indemnitee is furnished the indemnity provided for herein by the Company.

NOW, THEREFORE, in consideration of the foregoing premises and the mutual covenants and agreements set forth below, the parties hereto, intending to be legally bound, hereby agree as follows:

1.Definitions. For purposes of this Agreement, the following terms shall have the corresponding meanings set forth below.

“Claim” means a claim or action asserted by a Person in a Proceeding or any other written demand for relief in connection with or arising from an Indemnification Event.

“Covered Entity” means (i) the Company, (ii) any subsidiary of the Company or (iii) any other Person for which Indemnitee is or was or may be deemed to be serving, at the request

of the Company or any subsidiary of the Company, as a director, officer, employee, controlling person, agent or fiduciary.

“Disinterested Director” means, with respect to any determination contemplated by this Agreement, any Person who, as of the time of such determination, is a member of the Company’s board of directors but is not a party to any Proceeding then pending with respect to any Indemnification Event.

“Exchange Act” means the Securities Exchange Act of 1934, as amended.

“Expenses” means any and all direct and indirect fees and costs, retainers, court costs, transcript costs, fees of experts, witness fees, travel expenses, duplicating, printing and binding costs, telephone charges, postage and delivery service fees and all other disbursements or expenses of any type or nature whatsoever reasonably incurred by Indemnitee (including, subject to the limitations set forth in Section 3(c) below, reasonable attorneys’ fees) in connection with or arising from an Indemnification Event, including, without limitation: (i) the investigation or defense of a Claim; (ii) being, or preparing to be, a witness or otherwise participating, or preparing to participate, in any Proceeding; (iii) furnishing, or preparing to furnish, documents in response to a subpoena or otherwise in connection with any Proceeding; (iv) any appeal of any judgment, outcome or determination in any Proceeding (including, without limitation, any premium, security for and other costs relating to any cost bond, supersedeas bond or any other appeal bond or its equivalent); (v) establishing or enforcing any right to indemnification under this Agreement (including, without limitation, pursuant to Section 2(c) below), the General Corporation Law of Delaware (“DGCL”) or otherwise, regardless of whether Indemnitee is ultimately successful in such action, unless as a part of such action, a court of competent jurisdiction over such action determines that each of the material assertions made by Indemnitee as a basis for such action was not made in good faith or was frivolous; (vi) Indemnitee’s defense of any Proceeding instituted by or in the name of the Company under this Agreement to enforce or interpret any of the terms of this Agreement (including, without limitation, costs and expenses incurred with respect to Indemnitee’s counterclaims and cross-claims made in such action); and (vii) any Federal, state, local or foreign taxes imposed on Indemnitee as a result of the actual or deemed receipt of any payments under this Agreement, including all interest, assessments and other charges paid or payable with respect to such payments. For purposes of clarification, Expenses shall not include Losses.

An “Indemnification Event” shall be deemed to have occurred if Indemnitee was or is or becomes, or is threatened to be made, a party to or witness or other participant in, or was or is or becomes obligated to furnish or furnishes documents in response to a subpoena or otherwise in connection with, any Proceeding by reason of the fact that Indemnitee is or was or may be deemed a director, officer, employee, controlling person, agent or fiduciary of any Covered Entity, or by reason of any action or inaction on the part of Indemnitee while serving in any such capacity.

“Independent Legal Counsel” means an attorney or firm of attorneys that is experienced in matters of corporate law and neither presently is, nor in the thirty-six (36) months prior to such designation has been, retained to represent: (i) the Company or Indemnitee in any matter material to either such party, or (ii) any other party to the Proceeding giving rise to a claim for indemnification hereunder.

“Losses” means any and all losses, claims, damages, liabilities, judgments, fines, penalties, settlement payments, awards and amounts of any type whatsoever incurred by Indemnitee in connection with or arising from an Indemnification Event. For purposes of clarification, Losses shall not include Expenses.

“Organizational Documents” means any and all organizational documents, charters or similar agreements or governing documents, including, without limitation, (i) with respect to a corporation, its certificate of incorporation, memorandum of association or similar document, and bye-laws, (ii) with respect to a limited liability company, its operating agreement, and (iii) with respect to a limited partnership, its partnership agreement.

“Proceeding” means any threatened, pending or completed claim, action, suit, proceeding, arbitration or alternative dispute resolution mechanism, investigation, inquiry, administrative hearing or appeal or any other actual, threatened or completed proceeding, whether brought in the right of a Covered Entity or otherwise and whether of a civil (including intentional or unintentional tort claims), criminal, administrative, internal or investigative nature.

“Person” means an individual, a partnership, a corporation, a limited liability company, an association, a joint stock company, a trust, a joint venture, an unincorporated organization or other entity or government or agency or political subdivision thereof.

“Reviewing Party” means, with respect to any determination contemplated by this Agreement, any one of the following: (i) a majority of the Disinterested Directors, even if such Persons would not constitute a quorum of the Company’s board of directors; (ii) a committee consisting solely of Disinterested Directors, even if such Persons would not constitute a quorum of the Company’s board of directors, so long as such committee was designated by a majority of the Disinterested Directors; or (iii) Independent Legal Counsel designated by the Disinterested Directors (or, if there are no Disinterested Directors, the Company’s board of directors) (in which case, any determination shall be evidenced by the rendering of a written opinion).

“SEC” means the Securities and Exchange Commission.

“Securities Act” means the Securities Act of 1933, as amended.

2.Indemnification.

(a)Indemnification of Losses and Expenses. If an Indemnification Event has occurred, then, subject to Section 9 below, the Company shall indemnify and hold harmless Indemnitee, to the fullest extent permitted by the DGCL, as such law may be amended from time to time (but in the case of any such amendment, only to the extent that such amendment permits the Company to provide broader indemnification rights than were permitted prior thereto), against any and all Losses and Expenses; provided that the Company’s commitment set forth in this Section 2(a) to indemnify the Indemnitee shall be subject to the limitations and procedural requirements set forth in this Agreement.

(b)Partial Indemnification. If Indemnitee is entitled under any provision of this Agreement to indemnification by the Company for some or a portion of Losses or Expenses, but not, however, for the total amount thereof, the Company shall nevertheless indemnify Indemnitee for the portion thereof to which Indemnitee is entitled.

(c)Advancement of Expenses. The Company shall advance Expenses to or on behalf of Indemnitee to the fullest extent permitted by the DGCL, as such law may be amended from time to

time (but in the case of any such amendment, only to the extent that such amendment permits the Company to provide broader indemnification rights than were permitted prior thereto), as soon as practicable, but in any event not later than 30 days after written request therefor by Indemnitee, which request shall be accompanied by vouchers, invoices or similar evidence documenting in reasonable detail the Expenses incurred or to be incurred by Indemnitee; provided, however, that Indemnitee need not submit to the Company any information that counsel for Indemnitee reasonably deems is privileged and exempt from compulsory disclosure in any Proceeding. Execution and delivery of this Agreement by the Indemnitee constitutes an undertaking to repay such amounts advanced only if, and to the extent that, it shall ultimately be determined that Indemnitee is not entitled to be indemnified by the Company as authorized by this Agreement. No other form of undertaking shall be required other than the execution of this Agreement.

(d)Contribution. To the fullest extent permissible under applicable law, if the indemnification provided for in this Agreement is unavailable to Indemnitee for any reason whatsoever, the Company, in lieu of indemnifying Indemnitee, shall contribute to the amount incurred by Indemnitee, whether for Losses or Expenses, in connection with any Proceeding relating to an Indemnification Event under this Agreement, in such proportion as is deemed fair and reasonable by the Reviewing Party in light of all of the circumstances of such Proceeding in order to reflect (i) the relative benefits received by the Company and Indemnitee as a result of the event(s) and/or transaction(s) giving rise to such Proceeding; and (ii) the relative fault of the Company (and its directors, officers, employees and agents) and Indemnitee in connection with such event(s) and/or transaction(s).

3.Indemnification Procedures.

(a)Notice of Indemnification Event. Indemnitee shall give the Company notice as soon as practicable of any Indemnification Event of which Indemnitee becomes aware and of any request for indemnification hereunder, provided that any failure to so notify the Company shall not relieve the Company of any of its obligations under this Agreement, except if, and then only to the extent that, such failure increases the liability of the Company under this Agreement.

(b)Notice to Insurers. The Company shall give prompt written notice of any Indemnification Event which may be covered by the Company’s liability insurance to the insurers in accordance with the procedures set forth in each of the applicable policies of insurance. The Company shall thereafter take all necessary or desirable action to cause such insurers to pay, on behalf of Indemnitee, all amounts payable as a result of such Indemnification Event in accordance with the terms of such policies; provided that nothing in this Section 3(b) shall affect the Company’s obligations under this Agreement or the Company’s obligations to comply with the provisions of this Agreement in a timely manner as provided.

(c)Selection of Counsel. If the Company shall be obligated hereunder to pay or advance Expenses or indemnify Indemnitee with respect to any Losses, the Company shall be entitled to assume the defense of any related Claims, with counsel selected by the Company. After the retention of such counsel by the Company, the Company will not be liable to Indemnitee under this Agreement for any fees of counsel subsequently incurred by Indemnitee with respect to the defense of such Claims; provided that: (i) Indemnitee shall have the right to employ counsel in connection with any such Claim at Indemnitee’s expense; and (ii) if (A) the employment of counsel by Indemnitee has been previously authorized by the Company, (B) counsel for Indemnitee shall have provided the Company with written advice that there is a conflict of interest between the Company and Indemnitee in the conduct of any such defense, or (C) the Company shall not continue to retain such counsel to defend such Claim, then the fees and expenses of Indemnitee’s counsel shall be at the expense of the Company.

4.Determination of Right to Indemnification.

(a)Successful Proceeding. To the extent Indemnitee has been successful, on the merits or otherwise, in defense of any Proceeding referred to in Section 2(a), the Company shall indemnify Indemnitee against Losses and Expenses incurred by him or her in connection therewith. If

Indemnitee is not wholly successful in such Proceeding, but is successful, on the merits or otherwise, as to one or more but less than all Claims in such Proceeding, the Company shall indemnify Indemnitee against all Losses and Expenses actually or reasonably incurred by Indemnitee in connection with each successfully resolved Claim.

(b)Other Proceedings. In the event that Section 4(a) is inapplicable, the Company shall nevertheless indemnify Indemnitee as provided in Section 2(a) or 2(b), as applicable, or provide a contribution payment to the Indemnitee as provided in Section 2(d), to the extent determined appropriate by the Reviewing Party.

(c)Reviewing Party Determination. A Reviewing Party chosen by the Company’s board of directors shall determine whether Indemnitee is entitled to indemnification, subject to the following:

(i)A Reviewing Party so chosen shall act in the utmost good faith to assure Indemnitee a complete opportunity to present to such Reviewing Party Indemnitee’s case that Indemnitee has met the applicable standard of conduct.

(ii)Indemnitee shall be deemed to have acted in good faith if Indemnitee’s action is based on the records or books of account of a Covered Entity, including, without limitation, its financial statements, or on information supplied to Indemnitee by the officers or employees of a Covered Entity in the course of their duties, or on the advice of legal counsel for a Covered Entity or on information or records given, or reports made, to a Covered Entity by an independent certified public accountant or by an appraiser or other expert selected with reasonable care by a Covered Entity. In addition, the knowledge and/or actions, or failure to act, of any director, officer, agent or employee of a Covered Entity shall not be imputed to Indemnitee for purposes of determining the right to indemnification under this Agreement. Whether or not the foregoing provisions of this Section 4(c)(ii) are satisfied, it shall in any event be presumed that Indemnitee has at all times acted in good faith and in a manner Indemnitee reasonably believed to be in or not opposed to the best interests of the Company. Any Person seeking to overcome this presumption shall have the burden of proof and the burden of persuasion, by clear and convincing evidence.

(iii)If a Reviewing Party chosen pursuant to this Section 4(c) shall not have made a determination whether Indemnitee is entitled to indemnification within thirty (30) days after receipt by the Company of the request therefor, the requisite determination of entitlement to indemnification shall be deemed to have been made and Indemnitee shall be entitled to such indemnification, absent (A) a misstatement by Indemnitee of a material fact, or an omission of a material fact necessary to make Indemnitee’s statement not materially misleading, in connection with the request for indemnification, or (B) a prohibition of such indemnification under applicable law; provided, however, that such 30 day period may be extended for a reasonable time, not to exceed an additional fifteen (15) days, if the Reviewing Party in good faith requires such additional time for obtaining or evaluating documentation and/or information relating thereto.

(d)Appeal to Court. Notwithstanding a determination by a Reviewing Party chosen pursuant to Section 4(c) that Indemnitee is not entitled to indemnification with respect to a specific Claim or Proceeding (an “Adverse Determination”), Indemnitee shall have the right to apply to the court in which that Claim or Proceeding is or was pending or any other court of competent jurisdiction for the purpose of enforcing Indemnitee's right to indemnification pursuant to this Agreement, provided that Indemnitee shall commence any such Proceeding seeking to enforce Indemnitee’s right to indemnification within one (1) year following the date upon which Indemnitee is notified in writing by the Company of the Adverse Determination. In the event of any dispute between the parties concerning their respective rights and obligations hereunder, the Company shall have the burden of proving that the Company is not obligated to make the payment or advance claimed by Indemnitee.

(e)Presumption of Success. The Company acknowledges that a settlement or other disposition short of final judgment shall be deemed a successful resolution for purposes of Section 4(a) if it permits a party to avoid expense, delay, distraction, disruption or uncertainty. In the event that any Proceeding to which Indemnitee is a party is resolved in any manner other than by adverse judgment against Indemnitee (including, without limitation, settlement of such Proceeding with or without payment of money or other consideration), it shall be presumed that Indemnitee has been successful on the merits or otherwise in such Proceeding. Anyone seeking to overcome this presumption shall have the burden of proof and the burden of persuasion, by clear and convincing evidence.

(f)Settlement of Claims. The Company shall not be liable to indemnify Indemnitee under this Agreement or otherwise for any amounts paid in settlement of any Proceeding effected without the Company’s written consent. The Company shall not settle any Proceeding in any manner that would impose any penalty or limitation on Indemnitee without Indemnitee’s written consent. Neither the Company nor the Indemnitee will unreasonably withhold their consent to any proposed settlement. The Company shall not be liable to indemnify the Indemnitee under this Agreement with regard to any judicial award if the Company was not given a reasonable and timely opportunity, at its expense, to participate in the defense of such action; the Company’s liability hereunder shall not be excused if participation in the Proceeding by the Company was barred by this Agreement.

5.Additional Indemnification Rights; Non-exclusivity.

(a)Scope. The Company hereby agrees to indemnify Indemnitee to the fullest extent permitted by law, even if such indemnification is not specifically authorized by the other provisions of this Agreement or any other agreement, the Organizational Documents of any Covered Entity or by applicable law. In the event of any change after the date of this Agreement in any applicable law, statute or rule that expands the right of a Delaware corporation to indemnify a member of its board of directors or an officer, employee, controlling person, agent or fiduciary, it is the intent of the parties hereto that Indemnitee shall enjoy by this Agreement the greater benefits afforded by such change. In the event of any change in any applicable law, statute or rule that narrows the right of a Delaware corporation to indemnify a member of its board of directors or an officer, employee, controlling person, agent or fiduciary, such change, to the extent not otherwise required by such law, statute or rule to be applied to this Agreement, shall have no effect on this Agreement or the parties rights and obligations hereunder except as set forth in Section 9(a) hereof.

(b)Non-exclusivity. The rights to indemnification, contribution and advancement of Expenses provided in this Agreement shall not be deemed exclusive of, but shall be in addition to, any other rights to which Indemnitee may at any time be entitled under the Organizational Documents of any Covered Entity, any other agreement, any vote of shareholders or Disinterested Directors, the laws of the state of Delaware, the laws of Bermuda, or otherwise. Furthermore, no right or remedy herein conferred is intended to be exclusive of any other right or remedy, and every other right and remedy shall be cumulative and in addition to every other right and remedy given hereunder or now or hereafter existing at law or in equity or otherwise. The assertion of any right or remedy hereunder or otherwise shall not prevent the concurrent assertion of any other right or remedy. The rights to indemnification, contribution and advancement of Expenses provided in this Agreement shall continue as to Indemnitee for any action Indemnitee took or did not take while serving in an indemnified capacity even though Indemnitee may have ceased to serve in such capacity.

6.No Duplication of Payments. The Company shall not be liable under this Agreement to make any payment of any amount otherwise indemnifiable hereunder, or for which advancement is provided hereunder, if and to the extent Indemnitee has otherwise actually received such payment, whether pursuant to any insurance policy, the Organizational Documents of any Covered Entity or otherwise.

7.Mutual Acknowledgment. Both the Company and Indemnitee acknowledge that, in certain instances, Federal law or public policy may override applicable state law and prohibit the

Company from indemnifying its directors and officers under this Agreement or otherwise. For example, the Company and Indemnitee acknowledge that the SEC has taken the position that indemnification is not permissible for liabilities arising under certain Federal securities laws, and Federal legislation prohibits indemnification for certain violations of the Employee Retirement Income Security Act of 1979, as amended. Indemnitee understands and acknowledges that the Company has undertaken, or may be required in the future to undertake, with the SEC to submit the question of indemnification to a court in certain circumstances for a determination of the Company’s right under public policy to indemnify Indemnitee, and any right to indemnification hereunder shall be subject to, and conditioned upon, any such required court determination.

8.Liability Insurance. The Company may maintain liability insurance applicable to directors and officers of the Company and shall cause Indemnitee to be named as an insured in such a manner as to provide Indemnitee the same rights and benefits as are accorded to the most favorably insured of the Company’s officers and directors (other than in the case of an independent director liability insurance policy if Indemnitee is not an independent or outside director). The Company shall advise Indemnitee as to the general terms of, and the amounts of coverage provide by, any liability insurance policy described in this Section 8 and shall promptly notify Indemnitee if, at any time, any such insurance policy is terminated or expired without renewal or if the amount of coverage under any such insurance policy will be decreased.

9.Exceptions. Any other provision herein to the contrary notwithstanding, the Company shall not be obligated pursuant to the terms of this Agreement to indemnify Indemnitee:

(a)against any Losses or Expenses, or advance Expenses to Indemnitee, with respect to Claims initiated or brought voluntarily by Indemnitee, and not by way of defense (including, without limitation, affirmative defenses and counter-claims), except (i) Claims to establish or enforce a right to indemnification, contribution or advancement with respect to an Indemnification Event, whether under this Agreement, any other agreement or insurance policy, the Company’s Organizational Documents of any Covered Entity, the laws of the DGCL, the laws of Bermuda or otherwise, or (ii) if the Company’s board of directors has approved specifically the initiation or bringing of such Claim;

(b)against any Losses or Expenses, or advance Expenses to Indemnitee, with respect to Claims arising (i) with respect to an accounting of profits made from the purchase and sale (or sale and purchase) by Indemnitee of securities of the Company within the meaning of Section 16(b) of the Exchange Act or (ii) pursuant to Section 304 or 306 of the Sarbanes-Oxley Act of 2002, as amended, or any rule or regulation promulgated pursuant thereto;

(c)brought about or contributed to by the fraud or dishonesty of the Indemnitee seeking payment hereunder; however, notwithstanding the foregoing, the Indemnitee shall be indemnified under this Agreement as to any claims upon which suit may be brought against him or her by reason of any alleged dishonesty on his or her part, unless it shall be decided in a Proceeding that he committed (i) acts of active and deliberate dishonesty, (ii) with actual dishonest purpose and intent, and (iii) which acts were material to the cause of action so adjudicated; and

(d)if, and to the extent, that a court of competent jurisdiction renders a final, unappealable decision that such indemnification is not lawful.

10.Miscellaneous.

(a)Counterparts. This Agreement may be executed in one or more counterparts, each of which shall constitute an original.

(b)Binding Effect; Successors and Assigns.This Agreement shall be binding upon and inure to the benefit of and be enforceable by the parties hereto and their respective successors and assigns (including with respect to the Company, any direct or indirect successor by purchase, merger, amalgamation, consolidation or otherwise to all or substantially all of the business and/or assets of the Company) and with respect to Indemnitee, his or her spouse, heirs, and personal and legal representatives. The Company shall require and cause any successor or assign (whether direct or

indirect, by purchase, merger, amalgamation, consolidation or otherwise) to all, substantially all, or a substantial part, of the business and/or assets of the Company, to assume and agree to perform this Agreement in the same manner and to the same extent that the Company would be required to perform if no such succession or assignment had taken place. This Agreement shall continue in effect with respect to Claims relating to Indemnification Events regardless of whether Indemnitee continues to serve as a director, officer, employee, controlling person, agent or fiduciary of any Covered Entity.

(c)Notice. All notices and other communications required or permitted hereunder shall be in writing, shall be effective when given, and shall in any event be deemed to be given (i) five (5) days after deposit with the U.S. Postal Service or other applicable postal service, if delivered by first class mail, postage prepaid, (ii) upon delivery, if delivered by hand, (iii) one (1) business day after the business day of deposit with Federal Express or similar, nationally recognized overnight courier, freight prepaid, or (iv) one (1) business day after the business day of delivery by confirmed facsimile transmission, if deliverable by facsimile transmission, with copy by other means permitted hereunder, and addressed, if to Indemnitee, to the Indemnitee’s address or facsimile number (as applicable) as set forth beneath the Indemnitee’s signature to this Agreement, or, if to the Company, at the address or facsimile number (as applicable) of its principal corporate offices (attention: Secretary), or at such other address or facsimile number (as applicable) as such party may designate to the other parties hereto.

(d)Enforceability. This Agreement is a legal, valid and binding obligation of the Company, enforceable against the Company in accordance with its terms.

(e)Consent to Jurisdiction and Service of Process. The Company and Indemnitee each hereby irrevocably consent to the jurisdiction and venue of the state of Delaware for all purposes in connection with any Proceeding which arises out of or relates to this Agreement and agree that any Proceeding instituted under this Agreement shall be commenced, prosecuted and continued only in the state of Delaware. The Company and Indemnitee each hereby irrevocably agree that service of legal process with respect to any Proceeding may be effected by delivery by overnight delivery and email of a summons to the following:

[ADD CONTACT INFORMATION FOR INDEMNITEE]

(f)Severability. The provisions of this Agreement shall be severable in the event that any of the provisions hereof (including any provision within a single section, paragraph or sentence) are held by a court of competent jurisdiction to be invalid, void or otherwise unenforceable, and the remaining provisions shall remain enforceable to the fullest extent permitted by law. Furthermore, to the fullest extent possible, the provisions of this Agreement (including, without limitation, each portion of this Agreement containing any provision held to be invalid, void or otherwise unenforceable that is not itself invalid, void or unenforceable) shall be construed so as to give effect to the extent manifested by the provision held invalid, illegal or unenforceable.

(g)Choice of Law. This Agreement shall be governed by and its provisions shall be construed and enforced in accordance with, the laws of the state of Delaware, without regard to the conflict of laws principles thereof.

(h)Subrogation. In the event of payment under this Agreement, the Company shall be subrogated to the extent of such payment to all of the rights of recovery of Indemnitee who shall execute all documents required and shall do all acts that may be necessary to secure such rights and to enable the Company effectively to bring suit to enforce such rights.

(i)Amendment and Termination. No amendment, modification, termination or cancellation of this Agreement shall be effective unless it is in a writing signed by the parties to be bound thereby. Notice of same shall be provided to all parties hereto. No waiver of any of the provisions of this Agreement shall be deemed or shall constitute a waiver of any other provisions hereof (whether or not similar) nor shall such waiver constitute a continuing waiver.

(j)No Construction as Employment Agreement. This Agreement is not an employment agreement between the Company and the Indemnitee and nothing contained in this Agreement shall be construed as giving Indemnitee any right to be retained or continue in the employ or service of any Covered Entity.

(k)Supersedes Previous Agreements. This Agreement supersedes all prior agreements and understandings, oral, written and implied, between the parties hereto with respect to the subject matter hereof. All such prior agreements and understandings are hereby terminated and deemed of no further force or effect.

[remainder of page intentionally left blank; signature page follows]

In Witness Whereof, the parties hereto have executed this Agreement on and as of the day and year first above written.

SIRIUS INTERNATIONAL

INSURANCE GROUP, LTD.:

___________________________

a Bermuda exempted limited liability company

By:

Name:

Title:

INDEMNITEE:

EX-10.9.1

Exhibit 10.9.1

Sirius International Insurance Group, Ltd.

2018 Omnibus Incentive Plan

Restricted Share Unit Award Notice

Holder: [•]

You have been awarded Restricted Share Units (the “Award”) with respect to Common Shares of Sirius International Insurance Group, Ltd., a Bermuda exempted company (the “Company”), pursuant to the terms and conditions of the Sirius International Insurance Group, Ltd. 2018 Omnibus Incentive Plan (the “Plan”) and the Restricted Share Unit Award Agreement (together with this Award Notice, the “Agreement”). The Restricted Share Unit Award Agreement and the Plan are attached hereto. Capitalized terms not defined herein shall have the meanings specified in the Plan.

This Agreement shall be null and void unless you agree to be bound by and accept this Agreement on or before [•] by clicking the accept radio button in the Company’s share administration tool, Shareworks by Morgan Stanley.

Grant Date:	[•]
Book Value per Share at Grant Date:	[•]
Restricted Share Units:	You have been awarded a restricted share unit award with respect to [•] Common Shares (the “Restricted Share Units”), subject to adjustment as provided in the Plan.
Vesting Schedule:	Except as otherwise provided in the Plan, the Agreement or any other agreement between you and the Company or any of its Affiliates, the Restricted Share Units shall vest as of the third anniversary of the Grant Date (the “Vesting Date”), provided that you satisfy the employment vesting conditions set forth in the Restricted Share Unit Award Agreement.
Form of Settlement	Notwithstanding anything to the contrary in the Agreement, the Award shall be settled in the form of a cash payment in an amount equal to the book value per share of the Common Shares, calculated as of [•], that otherwise would be issued to you pursuant to Section 4 of the Agreement.

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Sirius International Insurance Group, Ltd.

By:[•]

Name: [•]

Title:[•]

Acknowledgment, Acceptance and Agreement:

By accepting this grant, I hereby accept the Award and acknowledge and agree to be bound by the terms and conditions of this Award Notice, the Agreement and the Plan.

[•]

__________________________________Date[•]

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Sirius International Insurance Group, Ltd.

2018 Omnibus Incentive Plan

RESTRICTED SHARE UNIT AWARD AGREEMENT

Sirius International Insurance Group, Ltd., a Bermuda exempted company (the “Company”), hereby grants to the individual (the “Holder”) named in the Award Notice attached hereto (the “Award Notice”) as of the grant date set forth in the Award Notice (the “Grant Date”), pursuant to the provisions of the Sirius International Insurance Group, Ltd. 2018 Omnibus Incentive Plan (the “Plan”), a Restricted Share Unit Award (the “Award”) with respect to the number of Common Shares set forth in the Award Notice, subject to the restrictions, terms and conditions set forth in the Plan and this agreement (this “Agreement”). Capitalized terms not defined herein shall have the meanings specified in the Award Notice or the Plan.

1. Award Subject to Acceptance of Agreement. The Award shall be null and void unless the Holder accepts this Agreement by clicking the accept radio button in the Company’s share administration tool, Shareworks by Morgan Stanley . In addition, the vesting provision of Section 3.2(b) - (c) and Section 3.3 hereof shall be subject to and conditioned on the Holder having executed previously and returned an original copy of the Restrictive Covenant Agreement previously provided to the Holder (the “Restrictive Covenant Agreement”) or executing and returning an original execution copy of the Restrictive Covenant Agreement provided to the Holder in connection herewith to the Company on or prior to [•].

2. Rights as a Shareholder. The Holder shall not be entitled to any privileges of ownership with respect to any Common Shares that are granted by this Award unless and until the Common Shares become vested pursuant to Section 3 and the Holder becomes the shareholder of record with respect to such Common Shares. As of each date on which the Company pays a cash dividend to record owners of Common Shares (a “Dividend Date”), the number of Common Shares subject to the Award shall increase by (i) the product of the total number of shares subject to the Award immediately prior to such Dividend Date multiplied by the dollar amount of the cash dividend paid per Common Share by the Company on such Dividend Date, divided by (ii) the Fair Market Value of a Common Share on such Dividend Date. Any such additional shares shall be subject to the same vesting conditions and payment terms set forth herein as the shares to which they relate.

3. Restriction Period and Vesting.

3.1. Service-Based Vesting Conditions. Subject to the remainder of this Section 3, the Award shall vest pursuant to the terms of this Agreement, the Plan and the Award Notice, provided that that the Holder remains in continuous employment with the Company during the period beginning on the Grant Date and ending on the Vesting Date, each as set forth in the Award Notice (the “Restriction Period”). Notwithstanding the foregoing, the vesting

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provisions of Section 3.2(b) - (c) and Section 3.3. hereof shall lapse and any rights thereof shall be forfeited in its entirety if the Holder breaches any Restrictive Covenant Agreement then in effect prior to the date on which the Award is settled.

3.2. Termination of Employment.

(a)Termination for any Reason if Holder has not Executed the Restrictive Covenant Agreement. If the Holder has not executed the Restrictive Covenant Agreement prior to the date hereof or on or prior to [•], and the Holder’s employment with the Company is terminated prior to the Vesting Date by the Company or the Holder for any reason, then the unvested portion of the Award shall be immediately forfeited by the Holder and cancelled by the Company.

(b)Termination Without Cause, for Good Reason or Due to Death or Disability if Holder has executed the Restrictive Covenant Agreement. If the Holder has executed the Restrictive Covenant Agreement prior to the date hereof or on or prior to [•], then, except as provided under Section 3.3, if the Holder’s employment with the Company is terminated prior to the Vesting Date (i) by the Company without Cause (including due to the Holder’s Disability), (ii) by the Holder for Good Reason or (iii) due to the Holder’s death, then the Holder shall be entitled to a prorated portion of the Award that would have vested if the Holder’s employment had continued through the Vesting Date. Such prorated Award shall be equal to the number of shares subject to the Award multiplied by a fraction, the numerator of which shall be the sum of (x) the number of full months in the Restriction Period during which the Holder was employed by the Company and (y) the number of months in the Severance Period (as defined in the Sirius Group Severance and Change in Control Plan, and the denominator of which shall be 36; provided, however, that in no event shall such fraction exceed 36/36. Any remaining portion of the Award shall be forfeited by the Holder and cancelled by the Company.

(c)Termination for Cause or Voluntary Resignation. If the Holder’s employment with the Company is terminated prior to the end of the Restriction Period (i) by the Company for Cause or (ii) by the Holder for any reason other than Good Reason, then the unvested portion of the Award shall be immediately forfeited by the Holder and cancelled by the Company.

3.3. Change in Control. If the Holder has executed the Restrictive Covenant Agreement prior to the date hereof or on or prior to [•], then, upon a Change in Control, the Committee, as constituted prior to the Change in Control, may treat this award in any manner authorized by the Plan, subject to the following:

(a) Settlement of Award Not Properly Substituted or Assumed. In the event of a Change in Control pursuant to which the Award is outstanding and not effectively substituted, assumed or continued by the surviving or acquiring corporation in such Change in Control (as

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determined by the Board or Committee (as constituted prior to such Change in Control), with appropriate adjustments to the number and kind of shares, in each case, that preserve the value of the shares subject to the Award and other material terms and conditions of the outstanding Award as in effect immediately prior to the Change in Control), the Award shall vest as of the date of the Change in Control. Any portion of the Award subject to this Section 3.3(a) shall be settled in cash within 60 days following the Change in Control.

(b) Settlement of Award Properly Substituted or Assumed. In the event of a Change in Control pursuant to which the Award is outstanding and is effectively substituted, assumed or continued by the surviving or acquiring corporation in such Change in Control (as determined by the Board or Committee (as constituted prior to such Change in Control), with appropriate adjustments to the number and kind of shares, in each case, that preserve the value of the shares subject to the Award and other material terms and conditions of the outstanding Award as in effect immediately prior to the Change in Control), then any such substituted or continued Award shall provide that if the Company terminates the Holder’s employment without Cause (including due to Disability), the Holder resigns for Good Reason or the Holder’s employment terminates due to death, in any case, within 24 months following such Change in Control (and prior to the Vesting Date) and the Holder executes and does not revoke a waiver and release of claims in the form prescribed by the Company within 45 days after the date of such termination, the Award shall become fully vested as of the date of such termination. Any portion of the Award subject to this Section 3.3(b) shall be settled in cash within 60 days following the termination of employment. If, following a Change in Control, the Holder experiences a termination of employment prior to the Vesting Date other than as set forth in this Section 3.3(b), the Award shall be immediately forfeited by the Holder and cancelled by the Company.

3.4. Definitions.

(a) Cause. For purposes of this Award, “Cause” shall have the meaning set forth in any then applicable employment or other similar written agreement (including such similar term or concept, as determined by the Committee) between the Holder and the Company or an Affiliate. If there is no such written agreement or if such agreement does not define Cause, then Cause shall mean (i) a material and continued failure of the Holder to perform the Holder’s duties, other than due to death or Disability, which failure has continued for more than 30 days following written notice of such nonperformance from the Company; (ii) conviction of or pleading guilty or no contest to an act of fraud, embezzlement, or misappropriation of assets or property (tangible or intangible) of the Company or any Affiliate thereof; (iii) a material breach of the Restrictive Covenant Agreement; (iv) commission of a felony, including a plea of guilty or nolo contendere, or an indictment or written admission thereof; (v) gross negligence or willful misconduct in the performance by the Holder of his duties that is reasonably likely to have an adverse effect on the business or reputation of the Company or its Affiliates; or (vi) the Holder’s material violation of

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the material written policies of the Company (e.g., sexual harassment, data protection policy, etc.). For the avoidance of doubt, the definition of Cause as well as the consequences of termination for Cause as set out in the Plan, the Agreement and the Award Notice shall apply regardless of whether such termination of employment may be justified under any applicable employment protection legislation, and regardless of whether such termination may be challenged by the Holder, and regardless of whether such termination is invalidated by verdict or a court order.

(b) Disability. For purposes of this Award, “Disability” shall mean, with respect to any U.S. Holder, such Holder becoming disabled under one of the Company’s long-term disability plans or becoming eligible for benefits from the Social Security Administration. For all non-U.S. Holders, Disability shall mean the Holder is incapacitated for a period of at least 180 days by accident, sickness or other circumstance that renders such Holder mentally or physically incapable of performing the material duties and services required of the Holder in the Holder’s position with the Company on a full-time basis during such period.

(c) Good Reason. For purposes of this Award, “Good Reason” shall have the meaning set forth in any then applicable employment or other similar written agreement (including such similar term or concept, as determined by the Committee) between the Holder and the Company or an Affiliate. If there is no such written agreement or if such agreement does not define “Good Reason,” then “Good Reason” shall mean the Holder has complied with the Good Reason Process (as defined below) following the occurrence of any of the following conditions (without the Holder’s written consent or waiver): (i) a material diminution in the Holder’s responsibilities, authority or duties, unless such diminution is in connection with a Cause event; (ii) a diminution in the Holder’s annual base salary or target annual bonus opportunity; (iii) during the 24-month period following a Change in Control, a material diminution in the regular target annual long term incentive opportunity or the annual target long-term incentive award subsequently granted to the Holder in an amount less than the regular target opportunity, but in all cases disregarding the equity awards granted in connection with the Company’s going-public transaction in 2018 and other special cash or equity awards; (iv) a material change in the geographic location at which the Holder provides services to the Company; or (v) a material breach of any employment or other material agreement between the Company or one of its Affiliates and the Holder. For purposes of this Award, “Good Reason Process” shall mean that (i) the Holder reasonably determines in good faith that a Good Reason condition has occurred; (ii) the Holder notifies the Company in writing of the occurrence of the Good Reason condition within 60 days of the Holder having actual or constructive knowledge of the occurrence of such condition; (iii) the Holder cooperates in good faith with the Company’s efforts, for a period not less than 30 days following such notice (the “Cure Period”), to remedy the condition; (iv) notwithstanding such efforts, the Good Reason condition continues to exist; and (v) the Holder terminates Holder’s Employment at least 10 days, but no more than 60 days, after the end of the

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Cure Period. For the avoidance of doubt, if the Company cures the Good Reason condition during the Cure Period, Good Reason shall be deemed not to have occurred.

4. Issuance or Delivery of Shares.  Except as otherwise provided for herein, the Company shall issue any shares that have become vested pursuant to this Award within 60 days after such shares become vested. Such issuance or delivery shall be evidenced by the appropriate entry on the books of the Company or of a duly authorized transfer agent of the Company.The Company shall pay all original issue or transfer taxes and all fees and expenses incident to such issuance or delivery, except as otherwise provided in Section 7.  Prior to the issuance to the Holder of Common Shares subject to the Award, the Holder shall have no direct or secured claim in any specific assets of the Company or in such Common Shares, and will have the status of a general unsecured creditor of the Company.

5. Clawback of Proceeds.

5.1. Clawback of Proceeds. This award is subject to the clawback provisions in Section 5.14 of the Plan.

5.2. Right of Setoff. The Holder agrees that by accepting the Award the Holder authorizes the Company and its Affiliates to deduct any amount or amounts owed by the Holder pursuant to this Section 5 from any amounts payable by or on behalf of the Company or any affiliate to the Holder, including, without limitation, any amount payable to the Holder as salary, wages, vacation pay, bonus or the vesting or settlement of the Award or any share-based award. This right of setoff shall not be an exclusive remedy and the Company’s or an Affiliate’s election not to exercise this right of setoff with respect to any amount payable to the Holder shall not constitute a waiver of this right of setoff with respect to any other amount payable to the Holder or any other remedy.

6. Transfer Restrictions and Investment Representation.

6.1. Nontransferability of Award. The Award shall not be transferable other than by will, the laws of descent and distribution or pursuant to beneficiary designation procedures approved by the Company. Except to the extent permitted by the foregoing sentence, the Award may be exercised or settled during the Holder’s lifetime only by the Holder or the Holder’s legal representative or similar person. Except as permitted by the second preceding sentence, the Award may not be sold, transferred, assigned, pledged, hypothecated, encumbered or otherwise disposed of (whether by operation of law or otherwise) or be subject to execution, attachment or similar process. Upon any attempt to so sell, transfer, assign, pledge, hypothecate, encumber or otherwise dispose of the Award, such Award and all rights hereunder shall immediately become null and void. All transfer restrictions provided for in this Section 6.1, shall lapse when the Common Shares are issued or delivered to the Holder.

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6.2. Investment Representation. The Holder hereby covenants that (a) any sale of any Common Share acquired upon the vesting of the Award shall be made either pursuant to an effective registration statement under the Securities Act of 1933, as amended (the “Securities Act”) and any applicable state securities laws, or pursuant to an exemption from registration under the Securities Act and such state securities laws and (b) the Holder shall comply with all regulations and requirements of any regulatory authority having control of or supervision over the issuance of the shares and, in connection therewith, shall execute any documents which the Committee shall in its sole discretion deem necessary or advisable.

7. Additional Terms and Conditions of Award.

7.1. Survival of Other Severance Benefits and Non-Duplication. If the Holder has executed the Restrictive Covenant Agreement prior to the date hereof or on or prior to [•], then, the severance benefits provided under Section 3.2 and Section 3.3 (the “Severance Benefits”) are not meant to replace or supersede any similar severance benefits provided under the Sirius Group Severance and Change in Control Plan or any employment agreement, arrangement or award agreement or any other similar contractual arrangement (“Other Severance Benefits”) and the Severance Benefits provided under this Agreement are not intended to result in any duplicative benefits to the Holder and this Agreement shall be administered accordingly. For the avoidance of doubt, this Section 7.1 is not meant to impinge or interfere with the Company’s ability to require the Holder to follow or adhere to any steps or requirements under this Agreement or Other Severance Benefits to obtain severance benefits contemplated thereunder (e.g., executing any releases, complying with any restrictive covenants, etc.).

7.2. Withholding Taxes. Subject to Section 5.5 of the Plan, as a condition precedent to the issuance or delivery of the Common Shares, either (i) the Holder shall, upon request by the Company, pay to the Company such amount as the Company (or an Affiliate) may be required, under all applicable federal, state, local, foreign or other laws or regulations, to withhold and pay over as income or other withholding taxes (the “Required Tax Payments”) with respect to the Award or (ii) the Company (or an Affiliate) may, in its discretion, deduct any Required Tax Payments from any amount then or thereafter payable by the Company (or an affiliate) to the Holder, which may include the withholding of whole Common Shares, which would otherwise be delivered to the Holder having an aggregate Fair Market Value, determined as of the date on which such withholding obligation arises, equal to the Required Tax Payments, in either case in accordance with such terms, conditions and procedures that may be prescribed by the Company. A determination by the Company to satisfy the Required Tax Payments by withholding Common Shares shall be made by the Committee if the Holder is subject to Section 16 of the Exchange Act.

7.3. Compliance with Applicable Law. The Award is subject to the condition that if the listing, registration or qualification of the Common Shares subject to the

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Award upon any securities exchange or under any law, or the consent or approval of any governmental body, or the taking of any other action is necessary or desirable as a condition of, or in connection with, the delivery of shares hereunder, the Common Shares subject to the Award shall not be delivered, in whole or in part, unless such listing, registration, qualification, consent, approval or other action shall have been effected or obtained, free of any conditions not acceptable to the Company. The Company agrees to use reasonable efforts to effect or obtain any such listing, registration, qualification, consent, approval or other action.

7.4. Award Confers No Rights to Continued Employment. In no event shall the granting of the Award or its acceptance by the Holder, or any provision of this Agreement or the Plan, give or be deemed to give the Holder any right to continued employment by the Company or any Affiliate or affect in any manner the right of the Company or any Affiliate to terminate the employment of any person at any time.

7.5. No Mitigation. In no event shall Holder be obligated to seek other employment or take any other action by way of mitigation of the amounts payable to Holder under any of the provisions of this Agreement and, such amounts shall not be reduced whether or not the Holder obtains other employment.

7.6. Decisions of Board or Committee. The Board or the Committee shall have the right to resolve all questions, which may arise in connection with the Award. Any interpretation, determination or other action made or taken by the Board or the Committee regarding the Plan or this Agreement shall be final, binding and conclusive.

7.7. Successors. This Agreement shall be binding upon and inure to the benefit of the Company and any successor of the Company, including without limitation any person, association, or entity which may hereafter acquire or succeed to all or substantially all of the business or assets of the Company by any means whether direct or indirect, by purchase, merger, consolidation, or otherwise and the Company shall require any such acquirer successor to assume this Agreement and the obligations and liabilities contemplated hereunder. Holder’s rights, benefits and obligations under this Agreement are personal and shall not be voluntarily or involuntarily assigned, alienated, or transferred, whether by operation of law or otherwise, without the prior written consent of the Company.

7.8. Notices. All notices, requests or other communications provided for in this Agreement shall be in writing and shall be deemed to have been duly given when personally delivered or when mailed by United States registered or certified mail, return receipt requested, postage prepaid, addressed as follows:

If to the Company: Sirius International Insurance Group, Ltd.

14 Wesley Street, 5th Floor

Hamilton HM11 Bermuda

Attention: Group General Counsel

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If to the Holder: At the most recent address

on file with the Company

or to such other address as either party may furnish to the other in writing in accordance herewith, except that notices of changes of address shall be effective only upon receipt.

7.9. Governing Law. This Agreement, the Award and all determinations made and actions taken pursuant hereto and thereto, to the extent not otherwise governed by the Code or the laws of the United States and/or Bermuda, shall be governed by the laws of New York and construed in accordance therewith without giving effect to principles of conflicts of laws.

7.10. Agreement Subject to the Plan. This Agreement is subject to the provisions of the Plan and shall be interpreted in accordance therewith. In the event that the provisions of this Agreement and the Plan conflict, the Plan shall control. The Holder hereby acknowledges receipt of a copy of the Plan.

7.11. Entire Agreement. Subject to Section 7.1, this Agreement constitutes the entire agreement of the parties with respect to the subject matter hereof and supersedes in its entirety all prior undertakings and agreements of the Company and the Holder with respect to the subject matter hereof, and may not be modified adversely to the Holder’s interest except by means of a writing signed by the Company and the Holder. Notwithstanding the foregoing, to the extent the Holder was subject to restrictive covenants prior to the execution of this Agreement, such restrictive covenants shall continue to remain in full force and effect with respect to any conduct or actions prior to the execution of this Agreement.

7.12. Severability. If a court of competent jurisdiction determines that any provision of this Agreement is invalid or unenforceable, then the invalidity or unenforceability of that provision shall not affect the validity or enforceability of any other provision of this Agreement, and all other provisions shall remain in full force and effect.

7.13. Amendment and Waiver. The Company may amend the provisions of this Agreement at any time; provided that an amendment that would adversely affect the Holder’s rights under this Agreement shall be subject to the written consent of the Holder. No course of conduct or failure or delay in enforcing the provisions of this Agreement shall affect the validity, binding effect or enforceability of this Agreement.

7.14. Compliance with Section 409A of the Code. This Award is intended to be exempt from or comply with Section 409A of the Code, and shall be interpreted and construed accordingly. To the extent this Agreement provides for the Award to become vested and be settled upon the Holder’s termination of employment, the applicable Common Shares shall be transferred to the Holder or his or her beneficiary upon the Holder’s “separation from service,”

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within the meaning of Section 409A of the Code; provided that if the Holder is a “specified employee,” within the meaning of Section 409A of the Code, then to the extent the Award constitutes nonqualified deferred compensation, within the meaning of Section 409A of the Code, such Common Shares shall be transferred to the Holder or his or her beneficiary upon the earlier to occur of (i) the six-month anniversary of such separation from service and (ii) the date of the Holder’s death.

7.15. Survival. If the Holder has executed the Restrictive Covenant Agreement prior to the date hereof or in connection herewith, then, the provisions of this Agreement related to the Restrictive Covenant Agreement shall survive and remain binding and enforceable, notwithstanding the expiration or termination of this Plan, the termination of a Holder’s employment for any reason or any settlement of the financial rights and obligations arising from such Holder’s participation hereunder, to the extent necessary to preserve the intended benefits of such provisions.

7.16. Unfunded Status of Awards; No Trust of Fund Created. The Plan is intended to constitute an “unfunded” plan for certain incentive awards. Neither the Plan nor any award shall create or be construed to create a trust or separate fund of any kind or a fiduciary relationship between the Company or any Affiliate and a participant or any other person. To the extent that any person acquires a right to receive payments from the Company or any Affiliate pursuant to an award, such right shall be no greater than the right of any general unsecured creditors of the Company or such Affiliate.

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EX-10.9.2

Exhibit 10.9.2

Sirius International Insurance Group, Ltd.

2018 Omnibus Incentive Plan

Performance Share Unit Award Notice

Holder: [•]

You have been awarded Performance Share Units (the “Award”) with respect to Common Shares of Sirius International Insurance Group, Ltd., a Bermuda exempted company (the “Company”), pursuant to the terms and conditions of the Sirius International Insurance Group, Ltd. 2018 Omnibus Incentive Plan (the “Plan”) and the Performance Share Unit Award Agreement (together with this Award Notice, the “Agreement”). The Performance Share Unit Award Agreement and the Plan are attached hereto. Capitalized terms not defined herein shall have the meanings specified in the Plan.

This Agreement shall be null and void unless you agree to be bound by and accept this Agreement on or before[•] by clicking the accept radio button in the Company’s share administration tool, Shareworks by Morgan Stanley.

Grant Date:	[•]
Book Value per Share at Grant Date:	$[•]
Performance Share Units:	You have been awarded a performance share unit award with respect to [•] Common Shares earned at the target level of performance, as set forth in Exhibit A hereto (the “Restricted Share Units”), subject to adjustment based on the extent to which the Company has attained the performance goals set forth in Exhibit A and the terms of the Plan.
Vesting Schedule:	Except as otherwise provided in the Plan, the Agreement or any other agreement between you and the Company or any of its Affiliates, the Performance Share Units shall vest based on the achievement of the performance goals set forth in Exhibit A over the performance period beginning [•] and ending [•]  (such period, the “Performance Period,” and the last day of the Performance Period, the “Vesting Date”), provided that you satisfy the employment vesting conditions set forth in the Performance Share Unit Award Agreement.
Form of Settlement	Notwithstanding anything to the contrary in the Agreement, the Award shall be settled in the form of a cash payment in an amount equal to the book value per share of the Common Shares, calculated as of [•], that otherwise would be issued to you pursuant to Section 4 of the Agreement.

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Sirius International Insurance Group, Ltd.

By:[•]

Name: [•]

Title:[•]

Acknowledgment, Acceptance and Agreement:

By accepting this grant, I hereby accept the Award and acknowledge and agree to be bound by the terms and conditions of this Award Notice, the Agreement and the Plan.

[•]__________________________________Date [•]

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Sirius International Insurance Group, Ltd.

2018 Omnibus Incentive Plan

PERFORMANCE SHARE UNIT AWARD AGREEMENT

Sirius International Insurance Group, Ltd., a Bermuda exempted company (the “Company”), hereby grants to the individual (the “Holder”) named in the Award Notice attached hereto (the “Award Notice”) as of the grant date set forth in the Award Notice (the “Grant Date”), pursuant to the provisions of the Sirius International Insurance Group, Ltd. 2018 Omnibus Incentive Plan (the “Plan”), a Performance Share Unit Award (the “Award”) with respect to the target number of Common Shares set forth in the Award Notice, subject to the restrictions, terms and conditions set forth in the Plan and this agreement (this “Agreement”). Capitalized terms not defined herein shall have the meanings specified in the Award Notice or the Plan.

1. Award Subject to Acceptance of Agreement. The Award shall be null and void unless the Holder accepts this Agreement by clicking the accept radio button in the Company’s share administration tool, Shareworks by Morgan Stanley. In addition, the vesting provision of Section 3.2(b) - (c) and Section 3.3 hereof shall be subject to and conditioned on the Holder having executed previously and returned an original copy of the Restrictive Covenant Agreement previously provided to the Holder (the “Restrictive Covenant Agreement”), or executing and returning an original execution copy of the Restrictive Covenant Agreement provided to the Holder in connection herewith to the Company on or prior to [•].

2. Rights as a Shareholder. The Holder shall not be entitled to any privileges of ownership with respect to any Common Shares that are granted by this Award unless and until the Common Shares become vested pursuant to Section 3 and the Holder becomes the shareholder of record with respect to such Common Shares. As of each date on which the Company pays a cash dividend to record owners of Common Shares (a “Dividend Date”), the target number of Common Shares subject to the Award shall increase by (i) the product of the total number of shares subject to the Award immediately prior to such Dividend Date multiplied by the dollar amount of the cash dividend paid per Common Share by the Company on such Dividend Date, divided by (ii) the Fair Market Value of a Common Share on such Dividend Date. Any such additional shares shall be subject to the same vesting conditions and payment terms set forth herein as the shares to which they relate.

3. Performance Period and Vesting.

3.1. Performance-Based Vesting Conditions. Subject to the remainder of this Section 3, the Award shall vest pursuant to the terms of this Agreement, the Plan and the Award Notice based on the achievement of the performance goals set forth in Exhibit A over the Performance Period as set forth in the Award Notice, provided that that the Holder remains in continuous employment with the Company during the period beginning on the Grant Date and ending on the Vesting Date, each as set forth in the Award Notice. Notwithstanding the foregoing, the vesting provisions of Section 3.2(b) and Section 3.3. hereof shall lapse and any rights thereof shall be forfeited in its entirety if the Holder breaches any Restrictive Covenant Agreement then in effect prior to the date on which the Award is settled.

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3.2. Termination of Employment.

(a)Termination for any Reason if Holder has not Executed the Restrictive Covenant Agreement. If the Holder has not executed the Restrictive Covenant Agreement prior to the date hereof or on or prior to [•], and the Holder’s employment with the Company is terminated prior to the Vesting Date by the Company or the Holder for any reason, then the unvested portion of the Award shall be immediately forfeited by the Holder and cancelled by the Company.

(b)Termination Without Cause, for Good Reason or Due to Death or Disability if Holder has executed the Restrictive Covenant Agreement. If the Holder has executed the Restrictive Covenant Agreement prior to the date hereof or on or prior to [•], then, except as provided under Section 3.3, if the Holder’s employment with the Company is terminated prior to the Vesting Date (i) by the Company without Cause (including due to the Holder’s Disability), (ii) by the Holder for Good Reason or (iii) due to the Holder’s death, then the Holder shall be entitled to a prorated portion of the Award that would have vested if the Holder’s employment had continued through the Vesting Date. Such prorated Award shall be equal to the number of shares subject to the Award that are earned at the end of the Performance Period multiplied by a fraction, the numerator of which shall be the sum of (x) number of full months in the Performance Period during which the Holder was employed by the Company and (y) the number of months in the Severance Period (as defined in the Sirius Group Severance and Change in Control Plan, and the denominator of which shall be 36; provided, however, that in no event shall such fraction exceed 36/36. Any remaining portion of the Award shall be forfeited by the Holder and cancelled by the Company.

(c)Termination for Cause or Voluntary Resignation. If the Holder’s employment with the Company is terminated prior to the end of the Restriction Period (i) by the Company for Cause or (ii) by the Holder for any reason other than Good Reason, then the unvested portion of the Award shall be immediately forfeited by the Holder and cancelled by the Company.

3.3. Change in Control. If the Holder has executed the Restrictive Covenant Agreement prior to the date hereof or on or prior to [•], then, upon a Change in Control, the Committee, as constituted prior to the Change in Control, may treat this award in any manner authorized by the Plan, subject to the following:

(a) Settlement of Award Not Properly Substituted or Assumed. In the event of a Change in Control pursuant to which the Award is outstanding and not effectively substituted, assumed or continued by the surviving or acquiring corporation in such Change in Control (as determined by the Board or Committee (as constituted prior to such Change in Control), with appropriate adjustments to the number and kind of shares, in each case, that preserve the value of the shares subject to the Award and other material terms and conditions of the outstanding Award as in effect immediately prior to the Change in Control), the Award shall vest as of the date of the Change in Control at the target level of performance. Any portion of the Award subject to this Section 3.3(a) shall be settled in cash within 60 days following the Change in Control.

(b) Settlement of Award Properly Substituted or Assumed. In the event of a Change in Control pursuant to which the Award is outstanding and is effectively substituted, assumed or continued by the surviving or acquiring corporation in such Change in Control (as determined by the Board or Committee (as constituted prior to such Change in Control), with appropriate adjustments to the number and kind of shares, in each case, that preserve the value of the shares subject to the Award and other

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material terms and conditions of the outstanding Award as in effect immediately prior to the Change in Control), then any such substituted or continued Award shall provide that if the Company terminates the Holder’s employment without Cause (including due to Disability), the Holder resigns for Good Reason or the Holder’s employment terminates due to death, in any case, within 24 months following such Change in Control (and prior to the Vesting Date) and the Holder executes and does not revoke a waiver and release of claims in the form prescribed by the Company within 60 days after the date of such termination, the Award shall become fully vested as of the date of such termination at the target level of performance, and be settled in cash within 60 days following the termination of employment. If, following a Change in Control, the Holder experiences a termination of employment prior to the Vesting Date other than as set forth in this Section 3.3(b), the Award shall be immediately forfeited by the Holder and cancelled by the Company.

3.4. Definitions.

(a) Cause. For purposes of this Award, “Cause” shall have the meaning set forth in any then applicable employment or other similar written agreement (including such similar term or concept, as determined by the Committee) between the Holder and the Company or an Affiliate. If there is no such written agreement or if such agreement does not define Cause, then Cause shall mean (i) a material and continued failure of the Holder to perform the Holder’s duties, other than due to death or Disability, which failure has continued for more than 30 days following written notice of such nonperformance from the Company; (ii) conviction of or pleading guilty or no contest to an act of fraud, embezzlement, or misappropriation of assets or property (tangible or intangible) of the Company or any Affiliate thereof; (iii) a material breach of the Restrictive Covenant Agreement; (iv) commission of a felony, including a plea of guilty or nolo contendere, or an indictment or written admission thereof; (v) gross negligence or willful misconduct in the performance by the Holder of his duties that is reasonably likely to have an adverse effect on the business or reputation of the Company or its Affiliates; or (vi) the Holder’s material violation of the material written policies of the Company (e.g., sexual harassment, data protection policy, etc.). For the avoidance of doubt, the definition of Cause as well as the consequences of termination for Cause as set out in the Plan, the Agreement and the Award Notice shall apply regardless of whether such termination of employment may be justified under any applicable employment protection legislation, and regardless of whether such termination may be challenged by the Holder, and regardless of whether such termination is invalidated by verdict or a court order.

(b) Disability. For purposes of this Award, “Disability” shall mean, with respect to any U.S. Holder, such Holder becoming disabled under one of the Company’s long-term disability plans or becoming eligible for benefits from the Social Security Administration. For all non-U.S. Holders, Disability shall mean the Holder is incapacitated for a period of at least 180 days by accident, sickness or other circumstance that renders such Holder mentally or physically incapable of performing the material duties and services required of the Holder in the Holder’s position with the Company on a full-time basis during such period.

(c) Good Reason. For purposes of this Award, “Good Reason” shall have the meaning set forth in any then applicable employment or other similar written agreement (including such similar term or concept, as determined by the Committee) between the Holder and the Company or an Affiliate. If there is no such written agreement or if such agreement does not define “Good Reason,” then “Good Reason” shall mean the Holder has complied with the Good Reason Process (as defined below) following the occurrence of any of the following conditions (without the Holder’s written consent or waiver): (i) a material diminution in the Holder’s responsibilities, authority or duties, unless such

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diminution is in connection with a Cause event; (ii) a diminution in the Holder’s annual base salary or target annual bonus opportunity; (iii) during the 24-month period following a Change in Control, a material diminution in the regular target annual long term incentive opportunity or the annual target long-term incentive award subsequently granted to the Holder in an amount less than the regular target opportunity, but in all cases disregarding the equity awards granted in connection with the Company’s going-public transaction in 2018 and other special cash or equity awards; (iv) a material change in the geographic location at which the Holder provides services to the Company; or (v) a material breach of any employment or other material agreement between the Company or one of its Affiliates and the Holder. For purposes of this Award, “Good Reason Process” shall mean that (i) the Holder reasonably determines in good faith that a Good Reason condition has occurred; (ii) the Holder notifies the Company in writing of the occurrence of the Good Reason condition within 60 days of the Holder having actual or constructive knowledge of the occurrence of such condition; (iii) the Holder cooperates in good faith with the Company’s efforts, for a period not less than 30 days following such notice (the “Cure Period”), to remedy the condition; (iv) notwithstanding such efforts, the Good Reason condition continues to exist; and (v) the Holder terminates Holder’s Employment at least 10 days, but no more than 60 days, after the end of the Cure Period. For the avoidance of doubt, if the Company cures the Good Reason condition during the Cure Period, Good Reason shall be deemed not to have occurred.

4. Issuance or Delivery of Shares.  Except as otherwise provided for herein, the Company shall issue any shares that have become vested pursuant to this Award within 60 days after such shares become vested. Such issuance or delivery shall be evidenced by the appropriate entry on the books of the Company or of a duly authorized transfer agent of the Company.The Company shall pay all original issue or transfer taxes and all fees and expenses incident to such issuance or delivery, except as otherwise provided in Section 7.  Prior to the issuance to the Holder of Common Shares subject to the Award, the Holder shall have no direct or secured claim in any specific assets of the Company or in such Common Shares, and will have the status of a general unsecured creditor of the Company.

5. Clawback of Proceeds.

5.1. Clawback of Proceeds. This award is subject to the clawback provisions in Section 5.14 of the Plan.

5.2. Right of Setoff. The Holder agrees that by accepting the Award the Holder authorizes the Company and its Affiliates to deduct any amount or amounts owed by the Holder pursuant to this Section 5 from any amounts payable by or on behalf of the Company or any affiliate to the Holder, including, without limitation, any amount payable to the Holder as salary, wages, vacation pay, bonus or the vesting or settlement of the Award or any share-based award. This right of setoff shall not be an exclusive remedy and the Company’s or an Affiliate’s election not to exercise this right of setoff with respect to any amount payable to the Holder shall not constitute a waiver of this right of setoff with respect to any other amount payable to the Holder or any other remedy.

6. Transfer Restrictions and Investment Representation.

6.1. Nontransferability of Award. The Award shall not be transferable other than by will, the laws of descent and distribution or pursuant to beneficiary designation procedures approved by the Company. Except to the extent permitted by the foregoing sentence, the Award may be exercised or settled during the Holder’s lifetime only by the Holder or the Holder’s legal representative or similar person. Except as permitted by the second preceding sentence, the Award may not be sold, transferred, assigned, pledged, hypothecated, encumbered or otherwise disposed of (whether by operation

6

of law or otherwise) or be subject to execution, attachment or similar process. Upon any attempt to so sell, transfer, assign, pledge, hypothecate, encumber or otherwise dispose of the Award, such Award and all rights hereunder shall immediately become null and void. All transfer restrictions provided for in this Section 6.1, shall lapse when the Common Shares are issued or delivered to the Holder.

6.2. Investment Representation. The Holder hereby covenants that (a) any sale of any Common Share acquired upon the vesting of the Award shall be made either pursuant to an effective registration statement under the Securities Act of 1933, as amended (the “Securities Act”) and any applicable state securities laws, or pursuant to an exemption from registration under the Securities Act and such state securities laws and (b) the Holder shall comply with all regulations and requirements of any regulatory authority having control of or supervision over the issuance of the shares and, in connection therewith, shall execute any documents which the Committee shall in its sole discretion deem necessary or advisable.

7. Additional Terms and Conditions of Award.

7.1. Survival of Other Severance Benefits and Non-Duplication. If the Holder has executed the Restrictive Covenant Agreement prior to the date hereof or on or prior to [•], then the severance benefits provided under Section 3.2 and Section 3.3 (the “Severance Benefits”) are not meant to replace or supersede any similar severance benefits provided under the Sirius Group Severance and Change in Control Plan or any employment agreement, arrangement or award agreement or any other similar contractual arrangement (“Other Severance Benefits”) and the Severance Benefits provided under this Agreement are not intended to result in any duplicative benefits to the Holder and this Agreement shall be administered accordingly. For the avoidance of doubt, this Section 7.1 is not meant to impinge or interfere with the Company’s ability to require the Holder to follow or adhere to any steps or requirements under this Agreement or Other Severance Benefits to obtain severance benefits contemplated thereunder (e.g., executing any releases, complying with any restrictive covenants, etc.).

7.2. Withholding Taxes. Subject to Section 5.5 of the Plan, as a condition precedent to the issuance or delivery of the Common Shares, either (i) the Holder shall, upon request by the Company, pay to the Company such amount as the Company (or an Affiliate) may be required, under all applicable federal, state, local, foreign or other laws or regulations, to withhold and pay over as income or other withholding taxes (the “Required Tax Payments”) with respect to the Award or (ii) the Company (or an Affiliate) may, in its discretion, deduct any Required Tax Payments from any amount then or thereafter payable by the Company (or an affiliate) to the Holder, which may include the withholding of whole Common Shares, which would otherwise be delivered to the Holder having an aggregate Fair Market Value, determined as of the date on which such withholding obligation arises, equal to the Required Tax Payments, in either case in accordance with such terms, conditions and procedures that may be prescribed by the Company. A determination by the Company to satisfy the Required Tax Payments by withholding Common Shares shall be made by the Committee if the Holder is subject to Section 16 of the Exchange Act.

7.3. Compliance with Applicable Law. The Award is subject to the condition that if the listing, registration or qualification of the Common Shares subject to the Award upon any securities exchange or under any law, or the consent or approval of any governmental body, or the taking of any other action is necessary or desirable as a condition of, or in connection with, the delivery of shares hereunder, the Common Shares subject to the Award shall not be delivered, in whole or in part, unless such listing, registration, qualification, consent, approval or other action shall have been effected or

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obtained, free of any conditions not acceptable to the Company. The Company agrees to use reasonable efforts to effect or obtain any such listing, registration, qualification, consent, approval or other action.

7.4. Award Confers No Rights to Continued Employment. In no event shall the granting of the Award or its acceptance by the Holder, or any provision of this Agreement or the Plan, give or be deemed to give the Holder any right to continued employment by the Company or any Affiliate or affect in any manner the right of the Company or any Affiliate to terminate the employment of any person at any time.

7.5. No Mitigation. In no event shall Holder be obligated to seek other employment or take any other action by way of mitigation of the amounts payable to Holder under any of the provisions of this Agreement and, such amounts shall not be reduced whether or not the Holder obtains other employment.

7.6. Decisions of Board or Committee. The Board or the Committee shall have the right to resolve all questions, which may arise in connection with the Award. Any interpretation, determination or other action made or taken by the Board or the Committee regarding the Plan or this Agreement shall be final, binding and conclusive.

7.7. Successors. This Agreement shall be binding upon and inure to the benefit of the Company and any successor of the Company, including without limitation any person, association, or entity which may hereafter acquire or succeed to all or substantially all of the business or assets of the Company by any means whether direct or indirect, by purchase, merger, consolidation, or otherwise and the Company shall require any such acquirer successor to assume this Agreement and the obligations and liabilities contemplated hereunder. Holder’s rights, benefits and obligations under this Agreement are personal and shall not be voluntarily or involuntarily assigned, alienated, or transferred, whether by operation of law or otherwise, without the prior written consent of the Company.

7.8. Notices. All notices, requests or other communications provided for in this Agreement shall be in writing and shall be deemed to have been duly given when personally delivered or when mailed by United States registered or certified mail, return receipt requested, postage prepaid, addressed as follows:

If to the Company: Sirius International Insurance Group, Ltd.

14 Wesley Street, 5th Floor

Hamilton HM11 Bermuda

Attention: Group General Counsel

If to the Holder: At the most recent address

on file with the Company

or to such other address as either party may furnish to the other in writing in accordance herewith, except that notices of changes of address shall be effective only upon receipt.

7.9. Governing Law. This Agreement, the Award and all determinations made and actions taken pursuant hereto and thereto, to the extent not otherwise governed by the Code or the laws of the United States and/or Bermuda, shall be governed by the laws of New York and construed in accordance therewith without giving effect to principles of conflicts of laws.

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7.10. Agreement Subject to the Plan. This Agreement is subject to the provisions of the Plan and shall be interpreted in accordance therewith. In the event that the provisions of this Agreement and the Plan conflict, the Plan shall control. The Holder hereby acknowledges receipt of a copy of the Plan.

7.11. Entire Agreement. Subject to Section 7.1, this Agreement constitutes the entire agreement of the parties with respect to the subject matter hereof and supersedes in its entirety all prior undertakings and agreements of the Company and the Holder with respect to the subject matter hereof, and may not be modified adversely to the Holder’s interest except by means of a writing signed by the Company and the Holder. Notwithstanding the foregoing, to the extent the Holder was subject to restrictive covenants prior to the execution of this Agreement, such restrictive covenants shall continue to remain in full force and effect with respect to any conduct or actions prior to the execution of this Agreement.

7.12. Severability. If a court of competent jurisdiction determines that any provision of this Agreement is invalid or unenforceable, then the invalidity or unenforceability of that provision shall not affect the validity or enforceability of any other provision of this Agreement, and all other provisions shall remain in full force and effect.

7.13. Amendment and Waiver. The Company may amend the provisions of this Agreement at any time; provided that an amendment that would adversely affect the Holder’s rights under this Agreement shall be subject to the written consent of the Holder. No course of conduct or failure or delay in enforcing the provisions of this Agreement shall affect the validity, binding effect or enforceability of this Agreement.

7.14. Compliance with Section 409A of the Code. This Award is intended to be exempt from or comply with Section 409A of the Code, and shall be interpreted and construed accordingly. To the extent this Agreement provides for the Award to become vested and be settled upon the Holder’s termination of employment, the applicable Common Shares shall be transferred to the Holder or his or her beneficiary upon the Holder’s “separation from service,” within the meaning of Section 409A of the Code; provided that if the Holder is a “specified employee,” within the meaning of Section 409A of the Code, then to the extent the Award constitutes nonqualified deferred compensation, within the meaning of Section 409A of the Code, such Common Shares shall be transferred to the Holder or his or her beneficiary upon the earlier to occur of (i) the six-month anniversary of such separation from service and (ii) the date of the Holder’s death.

7.15. Survival. If the Holder has executed the Restrictive Covenant Agreement prior to the date hereof or in connection herewith, then, the provisions of this Agreement related to the Restrictive Covenant Agreement shall survive and remain binding and enforceable, notwithstanding the expiration or termination of this Plan, the termination of a Holder’s employment for any reason or any settlement of the financial rights and obligations arising from such Holder’s participation hereunder, to the extent necessary to preserve the intended benefits of such provisions.

7.16. Unfunded Status of Awards; No Trust of Fund Created. The Plan is intended to constitute an “unfunded” plan for certain incentive awards. Neither the Plan nor any award shall create or be construed to create a trust or separate fund of any kind or a fiduciary relationship between the Company or any Affiliate and a participant or any other person. To the extent that any person acq

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uires a right to receive payments from the Company or any Affiliate pursuant to an award, such right shall be no greater than the right of any general unsecured creditors of the Company or such Affiliate.

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Exhibit A

Performance Vesting Conditions

[•]

11

EX-31.1

Exhibit 31.1 

Certification

Sirius International Insurance Group, Ltd.

Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 

I, Kernan "Kip" V. Oberting, certify that:

1. I have reviewed this Quarterly Report on Form 10-Q of Sirius International Insurance Group, Ltd.; 

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 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)) internal control over financial reporting (as defined by 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;

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 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.

Date:	May 13, 2020
By:	/s/ KERNAN "KIP" V. OBERTING
Name:	Kernan "Kip" V. Oberting
Title:	President and Chief Executive Officer

EX-31.2

Exhibit 31.2 

Certification

Sirius International Insurance Group, Ltd.

Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 

I, Ralph A. Salamone, certify that:

1. I have reviewed this Quarterly Report on Form 10-Q of Sirius International Insurance Group, Ltd.; 

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 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)) internal control over financial reporting (as defined by 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;

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 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.

Date:	May 13, 2020
By:	/s/ RALPH A. SALAMONE
Name:	Ralph A. Salamone
Title:	Chief Financial Officer

EX-32.1

Exhibit 32.1 

Sirius International Insurance Group, Ltd.

Certification Pursuant to Chapter 63, Title 18 United States Code §1350

As Adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 

In connection with the Quarterly Report of Sirius International Insurance Group, Ltd. (the "Company") on Form 10-Q for the quarter ended March 31, 2020, as filed with the Securities and Exchange Commission on the date hereof (the "Report"), I, Kernan "Kip" V. Oberting, President and Chief Executive Officer of the Company, certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that to my 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.

Date:	May 13, 2020
By:	/s/ KERNAN "KIP" V. OBERTING
Name:	Kernan "Kip" V. Oberting
Title:	President and Chief Executive Officer

A signed original of this written statement required by Section 906 has been provided to Sirius International Insurance Group, Ltd. and will be retained by Sirius International Insurance Group, Ltd. and furnished to the Securities and Exchange Commission or its staff upon request.

EX-32.2

Exhibit 32.2 

Sirius International Insurance Group, Ltd.

Certification Pursuant to Chapter 63, Title 18 United States Code §1350

As Adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 

In connection with the Quarterly Report of Sirius International Insurance Group, Ltd. (the "Company") on Form 10-Q for the quarter ended March 31, 2020, as filed with the Securities and Exchange Commission on the date hereof (the "Report"), I, Ralph A. Salamone, Chief Financial Officer of the Company, certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that to my 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.

Date:	May 13, 2020
By:	/s/ RALPH A. SALAMONE
Name:	Ralph A. Salamone
Title:	Chief Financial Officer

A signed original of this written statement required by Section 906 has been provided to Sirius International Insurance Group, Ltd. and will be retained by Sirius International Insurance Group, Ltd. and furnished to the Securities and Exchange Commission or its staff upon request.

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Common shareholder's equity, mezzanine equity, and non-controlling interests (Tables)

3 Months Ended

Mar. 31, 2020

Equity [Abstract]

Schedule of changes in the company's issued and outstanding common shares

The following table presents changes in the Company's issued and outstanding Common shares as of March 31, 2020 and 2019, respectively:

	Three months ended March 31,
(Millions)	2020	2019
Common shares:
Shares issued and outstanding, beginning of period	115,299,341	115,151,251
Issuance of shares to directors and employees	—	111,052
Shares issued and outstanding, end of period	115,299,341	115,262,303

Schedule of change in non-controlling interest

The following tables show the change in non-controlling interest for the three months ended March 31, 2020 and 2019:

(Millions)	For the three months ended March 31, 2020		For the three months ended March 31, 2019
Non-controlling interests, beginning of the period	$	2.4	$	1.7
Net income attributable to non-controlling interests	0.2		0.4
Other, net	—		0.1
Non-controlling interests, end of the period	$	2.6	$	2.2

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Fair value measurements (Tables)

3 Months Ended

Mar. 31, 2020

Fair Value Disclosures [Abstract]

Summary of financial assets and liabilities measured at fair value

The following tables summarize Sirius Group's financial assets and liabilities measured at fair value as of March 31, 2020 and December 31, 2019 by level:

	March 31, 2020
(Millions)	Fair Value			Level 1 Inputs			Level 2 Inputs		Level 3 Inputs
Assets measured at fair value
Fixed maturity investments:
U.S. Government and government agency	$	128.2		$	127.1		$	1.1	$	—
Corporate debt securities	444.3			—			444.3		—
Residential mortgage-backed securities	471.9			—			471.9		—
Asset-backed securities	524.4			—			524.4		—
Commercial mortgage-backed securities	94.3			—			94.3		—
Non-U.S. government and government agency	60.8			29.7			31.1		—
Preferred stocks	6.5			—			3.9		2.6
U.S. States, municipalities, and political subdivision	1.7			—			1.7		—
Total fixed maturity investments	1,732.1			156.8			1,572.7		2.6
Equity securities:
Fixed income mutual funds	192.1			192.1			—		—
Common stocks	184.4			184.4			—		—
Other equity securities(1)	(9.9		)	(11.6		)	1.7		—
Total equity securities	366.6			364.9			1.7		—
Short-term investments	1,041.8			1,019.5			22.3		—
Other long-term investments(2)	75.9			—			—		75.9
Total investments	$	3,216.4		$	1,541.2		$	1,596.7	$	78.5
Loan participation	19.9			—			—		19.9
Derivative instruments	11.7			1.0			—		10.7
Total assets measured at fair value	$	3,248.0		$	1,542.2		$	1,596.7	$	109.1
Liabilities measured at fair value
Contingent consideration liabilities	$	28.3		$	—		$	—	$	28.3
Derivative instruments	20.4			0.8			—		19.6
Total liabilities measured at fair value	$	48.7		$	0.8		$	—	$	47.9

⁽¹⁾Sirius Group engaged in short selling of certain equity securities for which settlement was pending as of March 31, 2020.

⁽²⁾Excludes fair value of $279.6 associated with hedge funds and private equity funds which fair value is measured using NAV practical expedient.

	December 31, 2019
(Millions)	Fair value		Level 1 inputs		Level 2 inputs		Level 3 inputs
Assets measured at fair value
Fixed maturity investments:
U.S. Government and government agency	$	110.5	$	109.1	$	1.4	$	—
Corporate debt securities	474.1		—		474.1		—
Asset-backed securities	486.8		—		486.8		—
Residential mortgage-backed securities	438.9		—		438.9		—
Commercial mortgage-backed securities	89.0		—		89.0		—
Non-U.S. government and government agency	63.0		31.7		31.3		—
Preferred stocks	17.0		—		—		17.0
U.S. States, municipalities, and political subdivision	1.7		—		1.7		—
Total fixed maturity investments	1,681.0		140.8		1,523.2		17.0
Equity securities:
Fixed income mutual funds	175.3		175.3		—		—
Common stocks	228.1		228.1		—		—
Other equity securities	1.8		—		1.8		—
Total equity securities	405.2		403.4		1.8		—
Short-term investments	1,085.2		1,073.7		11.5		—
Other long-term investments(1)	77.8		—		—		77.8
Total investments	$	3,249.2	$	1,617.9	$	1,536.5	$	94.8
Loan participation	20.0		—		—		20.0
Derivative instruments	11.4		1.3		—		10.1
Total assets measured at fair value	$	3,280.6	$	1,619.2	$	1,536.5	$	124.9
Liabilities measured at fair value
Contingent consideration liabilities	$	28.2	$	—	$	—	$	28.2
Derivative instruments	9.5		0.2		—		9.3
Total liabilities measured at fair value	$	37.7	$	0.2	$	—	$	37.5

⁽¹⁾Excludes fair value of $269.0 associated with hedge funds and private equity funds which fair value is measured using NAV practical expedient.

Rollforward of Level 3 fair value measurements

The following tables present changes in Level 3 for financial instruments measured at fair value for the three months ended March 31, 2020 and March 31, 2019:

	For the three months ended March 31, 2020
(Millions)	Fixed Maturities			Other long-term investments(1)			Loan Participation			Derivative instruments assets & (liabilities)			Contingent consideration (liabilities)
Balance as of January 1, 2020	$	17.0		$	77.8		$	20.0		$	0.8		$	(28.2	)
Total realized and unrealized gains (losses)	2.6			(0.9		)	—			(13.3		)	(0.1		)
Foreign currency gains (losses) through Other Comprehensive Income	—			(1.0		)	—			—			—
Purchases	—			—			—			—			—
Sales/Settlements	(17.0		)	—			(0.1		)	3.6			—
Balance as of March 31, 2020	$	2.6		$	75.9		$	19.9		$	(8.9	)	$	(28.3	)

⁽¹⁾Excludes fair value of $279.6 associated with hedge funds and private equity funds which fair value is measured using NAV practical expedient.

	For the three months ended March 31, 2019
(Millions)	Fixed Maturities			Other long-term investments(1)			Loan Participation		Derivative instruments assets & (liabilities)			Contingent consideration (liabilities)
Balance as of January 1, 2019	$	5.4		$	63.6		$	—	$	(0.5	)	$	(28.8	)
Total realized and unrealized gains (losses)	—			9.3			—		(5.1		)	—
Foreign currency gains (losses) through Other Comprehensive Income	—			(0.7		)	—		—			—
Purchases	—			15.8			—		—			—
Sales/Settlements	(5.4		)	—			—		0.8			—
Balance as of March 31, 2019	$	—		$	88.0		$	—	$	(4.8	)	$	(28.8	)

⁽¹⁾Excludes fair value of $301.7 associated with hedge funds and private equity funds which fair value is measured using NAV practical expedient.

Schedule of significant unobservable inputs used for recurring fair value measurements for Level 3 instruments

The table below presents information about the significant unobservable inputs used for recurring fair value measurements for certain Level 3 instruments as of March 31, 2020 and December 31, 2019, and includes only those instruments for which information about the inputs is reasonably available to Sirius Group, such as data from independent third-party valuation service providers and from internal valuation models.

(Millions, except share prices)	March 31, 2020
Description	Valuation Technique(s)	Fair value			Unobservable input
Private equity securities(1)	Share price of recent transaction	$	32.5		Purchase share price	40.6
Loan participation(1)	Purchase price of recent transaction	$	19.9		Comparable yields	Range - 4.46% - 7.25% Median - 5.75%
Preferred stock(1)	Share price of recent transaction	$	17.5		Purchase price	7.74
Private equity securities(1)	Multiple of GAAP book value	$	13.3		Book value multiple	Range - 0.73x-0.91x Median - 0.82x
Private debt instrument(1)	Discounted cash flow	$	6.2		Discount yield	Range - 11.87% - 12.32% Median - 12.08%
Private equity securities(1)	Purchase price of recent transaction	$	5.1		Purchase price	7.74
Currency swaps(2)	Third party appraisal	$	2.4		Broker quote	$	2.4
Preferred stock(1)	Purchase price of recent transaction	$	1.9		Purchase price	$	1.9
Currency forwards(2)	Third party appraisal	$	1.7		Broker quote	$	1.7
Private equity securities(1)	Purchase price of recent transaction	$	1.0		Purchase price	$	10.0
Equity warrants(2)	Option pricing model	$	0.9		Strike price	$	0.2
Preferred stock(1)	Purchase price of recent transaction	$	0.7		Purchase price	$	0.70
Private equity securities(1)	Purchase price of recent transaction	$	0.3		Purchase price	$	0.3
Weather derivatives(2)	Third party appraisal	$	(13.9	)	Broker quote	$	(13.9	)
Contingent consideration	External valuation model	$	(28.3	)	Discounted future payments	$	(28.3	)

⁽¹⁾As of March 31, 2020, each asset type consists of one security.

⁽²⁾SeeNote 12for discussion of derivative instruments.

(Millions, except share prices)	December 31, 2019
Description	Valuation Technique(s)	Fair value			Unobservable input
Private equity securities(1)	Share price of recent transaction	$	32.5		Purchase share price	$	40.6
Loan participation(1)	Purchase price of recent transaction	$	20.0		Purchase price	20.0
Preferred stock(1)	Share price of recent transaction	$	17.5		Purchase price	$	7.74
Private equity securities(1)	Multiple of GAAP book value	$	14.2		Book value multiple	0.9
Preferred stock(1)	Purchase price of recent transaction	$	12.2		Purchase price	$	12.2
Private debt instrument(1)	Purchase price of recent transaction	$	7.2		Purchase price	$	9.0
Weather derivatives(2)	Third party appraisal	$	7.0		Broker quote	$	7.0
Private equity security(1)	Purchase price of recent transaction	$	5.1		Purchase price	$	7.74
Preferred stock(1)	Purchase price of recent transaction	$	4.8		Purchase price	$	4.80
Currency forwards(2)	Third party appraisal	$	2.7		Broker quote	$	2.7
Private equity securities(1)	Purchase price of recent transaction	$	1.0		Purchase price	$	10.0
Equity warrants(2)	Option pricing model	$	0.4		Strike price	$	0.2
Private equity securities(1)	Purchase price of recent transaction	$	0.3		Purchase price	$	0.3
Currency swaps(2)	Third party appraisal	$	(3.6	)	Broker quote	$	(3.6	)
Currency forwards(2)	Third party appraisal	$	(5.7	)	Broker quote	$	(5.7	)
Contingent consideration	External valuation model	$	(28.2	)	Discounted future payments	$	(28.2	)

⁽¹⁾As of December 31, 2019, each asset type consists of one security.

⁽²⁾SeeNote 12for discussion of derivative instruments.

Schedule of financial instruments disclosed, but not carried at fair value

The following table includes financial instruments for which the carrying value differs from the estimated fair values at March 31, 2020 and December 31, 2019:

	March 31, 2020				December 31, 2019
(Millions)	Fair Value(1)		Carrying Value		Fair Value(1)		Carrying Value
Liabilities, Mezzanine equity, and Non-controlling interest:
2017 SEK Subordinated Notes	$	268.3	$	270.6	$	294.5	$	291.2
2016 SIG Senior Notes	$	394.9	$	394.2	$	394.5	$	394.0
Series B preference shares	$	171.4	$	205.0	$	186.4	$	223.0

⁽¹⁾Fair value estimated by internal pricing and considered a Level 3 measurement.

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Derivatives

3 Months Ended

Mar. 31, 2020

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivatives

Derivatives

Interest Rate Cap

Sirius Group entered into an interest rate swap ("Interest Rate Cap") with two financial institutions where it paid an upfront premium and in return receives a series of quarterly payments based on the 3-month London Interbank Offered Rate at the time of payment. The Interest Rate Cap does not qualify for hedge accounting. Changes in fair value are recognized as unrealized gains or losses and are presented within Other revenue. The fair value of the interest rate cap has been estimated using a single broker quote and, accordingly, has been classified as a Level 3 measurement as of March 31, 2020 and December 31, 2019. Collateral held is recorded within short-term investments with an equal amount recognized as a liability to return collateral. Sirius Group's liability to return that collateral is based on the amounts provided by the counterparties and investment earnings thereon. As at March 31, 2020 and December 31, 2019, Sirius Group held collateral balances of $0.2 million at the end of each period.

Foreign Currency Risk Derivatives

Sirius Group executes foreign currency forwards, swaps, and futures to manage foreign currency exposure. The foreign currency risk derivatives are not designated or accounted for under hedge accounting. Changes in fair value are recognized as unrealized gains or losses and are presented within Net foreign exchange gains. The fair value of the swaps and forwards are estimated using a single broker quote and accordingly, classified as a Level 3 measurement. The fair value of the futures is widely available and have quoted prices in active markets and accordingly, were classified as a Level 1 measurement. Sirius Group did not provide or hold any collateral associated with the foreign currency risk derivatives.

Weather Derivatives

Sirius Group holds assets and assumes liabilities related to weather and weather contingent risk management products. Weather and weather contingent derivative contracts are entered into with the objective of generating profits in normal climatic conditions. Accordingly, Sirius Group's weather and weather contingent derivatives are not designed to meet the criteria for hedge accounting under GAAP. Sirius Group receives payment of premium at the contract inception in exchange for bearing the risk of variations in a quantifiable weather index. Changes in fair value are recognized as unrealized gains or losses and are presented within Other revenue. The fair value of the weather derivatives was estimated using a broker quote. Because of the significance of the unobservable inputs used to estimate the fair value of Sirius Group's weather risk contracts, the fair value measurements of the contracts are deemed to be Level 3 measurements in the fair value hierarchy as of March 31, 2020 and December 31, 2019. Sirius Group does not provide or hold any collateral associated with the weather derivatives.

Equity Contracts

Sirius Group executes trades in equity futures contracts, call options, and put options to hedge against positions in Common equities. The equity contracts are not designated or accounted for under hedge accounting. Changes in fair value are presented within Net unrealized investment (losses) gains. The fair value of the equity contracts is widely available and have quoted prices in active markets and accordingly, were classified as a Level 1 measurement.

Equity Warrants

Sirius Group holds restricted equity warrants as part of its investment strategy. The equity warrants are not designated or accounted for under hedge accounting. Changes in fair value are presented within Net unrealized investment (losses) gains. The fair value of the equity warrants is estimated using a single broker quote and accordingly, classified as a Level 3 measurement. Sirius Group did not provide or hold any collateral associated with the equity warrants.

The following tables summarize information on the classification and amount of the fair value of derivatives not designated as hedging instruments within the Company's Consolidated Balance Sheets as at March 31, 2020 and December 31, 2019:

(Millions)	March 31, 2020						December 31, 2019
Derivatives not designated as hedging instruments	Notional Value		Asset derivative at fair value(1)		Liability derivative at fair value(2)		Notional Value			Asset derivative at fair value(1)		Liability derivative at fair value(2)
Interest rate cap	$	250.0	$	—	$	—	$	250.0		$	—	$	—
Foreign currency swaps	$	90.0	$	2.4	$	—	$	90.0		$	—	$	3.6
Foreign currency forwards	$	215.2	$	7.3	$	5.7	$	(30.0	)	$	2.7	$	5.7
Weather derivatives	$	105.9	$	—	$	13.9	$	110.7		$	7.0	$	—
Equity futures contracts	$	20.1	$	—	$	—	$	34.5		$	—	$	—
Equity call options	$	1.9	$	0.1	$	—	$	—		$	—	$	—
Equity put options	$	11.4	$	1.0	$	0.8	$	31.0		$	1.3	$	0.2
Equity warrants	$	0.9	$	0.9	$	—	$	0.4		$	0.4	$	—

⁽¹⁾Asset derivatives are classified within Other assets within the Company's Consolidated Balance Sheets at March 31, 2020 and December 31, 2019.

⁽²⁾Liability derivatives are classified within Other liabilities within the Company's Consolidated Balance Sheets at March 31, 2020 and December 31, 2019.

The following table summarizes information on the classification and net impact on earnings, recognized in the Company's Consolidated Statements of Income relating to derivatives during the three months ended March 31, 2020 and 2019:

(Millions)		For the three months ended March 31,
Derivatives not designated as hedging instruments	Classification of gains (losses) recognized in earnings	2020			2019
Interest rate cap	Other revenues	$	—		$	(0.1	)
Foreign currency swaps	Net foreign exchange gains	$	6.0		$	0.8
Foreign currency forwards	Net foreign exchange gains	$	0.5		$	0.2
Weather derivatives	Other revenues	$	(20.4	)	$	(6.0	)
Equity futures contracts	Net realized investment gains (losses)	$	2.9		$	(0.6	)
Equity futures contracts	Net unrealized investment gains	$	(1.0	)	$	(0.2	)
Equity put options	Net realized investment gains (losses)	$	5.5		$	—
Equity put options	Net unrealized investment gains	$	0.5		$	(0.4	)
Equity warrants	Net unrealized investment gains	$	0.5		$	—

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Segment information

3 Months Ended

Mar. 31, 2020

Segment Reporting [Abstract]

Segment information

Segment information

On December 31, 2019, Sirius Group completed an internal reorganization and beginning on January 1, 2020, Sirius Group's reportable segments consist of four reportable segments – Global Reinsurance, Global Accident & Health ("Global A&H"), U.S. Specialty, and Runoff & Other. The accounting policies of the reportable segments are the same as those used for the preparation of the Company's consolidated financial statements.

The Company's Global Reinsurance, Global A&H, U.S. Specialty, and Runoff & Other reportable segments each have managers who are responsible for the overall profitability of their respective segments and who are directly accountable to the Company's chief operating decision maker, the Chief Executive Officer ("CEO") of the Company. The CEO assesses segment operating performance, allocates capital, and makes resource allocation decisions based on Technical profit (loss), Underwriting profit (loss), and Underwriting profit (loss), including net service fee revenue.

Segment results are shown prior to corporate eliminations. Corporate eliminations are shown to reconcile to consolidated Technical profit (loss), consolidated Underwriting profit (loss) and consolidated Underwriting profit (loss), including net service fee revenue.

Sirius Group does not allocate its assets by segment, with the exception of goodwill and intangible assets, and, accordingly, investment income is not allocated to each segment. The internal reorganization had no impact to the allocation of goodwill and intangible assets to the Global A&H segment. Where applicable, all prior periods presented have been revised to conform to this new presentation.

Global Reinsurance

Global Reinsurance consists of Sirius Group's underwriting lines of business that offer Other Property, Property Catastrophe Excess Reinsurance, Agriculture Reinsurance, Aviation & Space, Marine & Energy, Trade Credit, Contingency, and Casualty Reinsurance:

Other Property—Sirius Group participates in the broker market for property reinsurance treaties written on a proportional and excess of loss basis. For Sirius Group's international business, the book consists of treaty, written on both a proportional and excess of loss basis, facultative, and primary business, primarily in Europe, Asia and Latin America. In the United States, the book predominantly centers on significant participations on proportional and excess of loss treaties mostly in the excess and surplus lines segment of the market.

Property Catastrophe Excess Reinsurance—Property catastrophe excess of loss reinsurance treaties cover losses from catastrophic events. Sirius Group writes a worldwide book with the largest concentration of exposure in Europe and the United States. The U.S. book written in Bermuda has a national account focus supporting principally the lower and/or middle layers of large capacity programs. Additionally, Stockholm writes a U.S. book mainly consisting of select small regional and standard lines carriers. The exposures written in the international book are diversified across many countries, regions, perils and layers.

Agriculture Reinsurance—Sirius Group provides stop-loss reinsurance coverage to companies writing U.S. government-sponsored multi-peril crop insurance ("MPCI"). Sirius Group's participation is net of the government's stop-loss reinsurance protection. Sirius Group also provides coverage for crop-hail and certain named perils when bundled with MPCI business. Sirius Group also writes agriculture business outside of the United States.

Aviation & Space—Sirius Group provides aviation insurance that covers loss of or damage to an aircraft and the aircraft operations' liability to passengers, cargo and hull as well as to third parties. Additionally, liability arising out of non-aircraft operations such as hangars, airports and aircraft products can be covered. Space insurance primarily covers loss of or damage to a satellite during launch and in orbit. The book consists of treaty, written on both a proportional and excess of loss basis, facultative, and primary business.

Marine & Energy—Sirius Group provides marine & energy reinsurance, primarily written on an excess of loss and proportional basis. Coverage offered includes damage to ships and goods in transit, marine liability lines, and offshore energy industry insurance. Sirius Group also writes yacht business, both on reinsurance and a primary basis. The marine & energy portfolio is diversified across many countries and regions.

Trade Credit—Sirius Group writes credit and bond reinsurance worldwide. The bulk of the business is traditional short-term commercial credit insurance, covering pre-agreed domestic and export sales of goods and services with typical coverage periods of 60 to 120 days. Losses under these policies are correlated to adverse changes in a respective country's gross national product.

Contingency—Sirius Group underwrote a contingency insurance book primarily for event cancellation and non-appearance.  Additionally, coverage for probability based risks with prize redemption was also offered. The contingency insurance business was exited in 2018 with no new exposures written; however, Sirius Group continues to offer this class on a treaty reinsurance basis on a selective basis for a few key clients.

CasualtyReinsurance—Sirius Group underwrites a cross section of all casualty lines, including general liability, umbrella, auto, workers compensation, professional liability, and other specialty classes, written on a proportional and excess of loss basis.

Global A&H

Global A&H consists of Sirius Group’s insurance and reinsurance business, and the managing general underwriting (“MGU”) units (which include ArmadaCorp Capital, LLC ("Armada") and International Medical Group, Inc. ("IMG")). Armada’s products are offered in the United States while IMG and the insurance and reinsurance business write accident and health products on a worldwide basis:

Accident and Health insurance and reinsurance—Sirius Group is an insurer of accident and health business in the United States and internationally, on either an admitted or surplus lines basis, as well as a reinsurer of medical expense, travel and personal accident on a treaty or facultative basis worldwide. The MGU unit writes health insurance business worldwide through IMG and within the United States via Armada.

U.S. Specialty

U.S. Specialty consists of Sirius Group's specialty insurance product offerings, which currently includes Environmental, Surety, and Workers’ Compensation.

Environmental underwrites a pure environmental insurance book in the United States consisting of four core products that revolve around pollution coverage, which are premises pollution liability, contractor's pollution liability, contractor's pollution and professional liability.

Surety underwrites commercial surety bonds, including non-construction contract bonds, in a broad range of business segments in the United States.

Workers’ Compensation, is a state-mandated insurance program that provides medical, disability, survivor, burial, and rehabilitation benefits to employees who are injured or killed due to a work-related injury or illness.

Runoff & Other

Runoff & Other includes the results of Sirius Global Solutions Holding Company ("Sirius Global Solutions"), which specializes in the acquisition and management of runoff liabilities for insurance and reinsurance companies, both in the United States and internationally, as well as asbestos risks, environmental risks and other long-tailed liability exposures.

The following tables summarize the segment results for the three months ended March 31, 2020 and 2019:

	For the three months ended March 31, 2020
(Expressed in millions of U.S. dollars)	Global Reinsurance			Global A&H			U.S. Specialty			Runoff & Other			Corporate Elimination			Total
Gross written premiums	$	465.3		$	262.1		$	20.8		$	69.4		$	—		$	817.6
Net written premiums	$	345.4		$	200.7		$	15.2		$	68.6		$	—		$	629.9
Net earned insurance and reinsurance premiums	$	235.0		$	117.9		$	12.8		$	69.0		$	—		$	434.7
Loss and allocated LAE(1)	(257.2		)	(80.3		)	(7.7		)	(68.9		)	—			(414.1		)
Insurance and reinsurance acquisition expenses	(50.9		)	(30.8		)	(3.0		)	(0.4		)	10.4			(74.7		)
Technical profit	(73.1		)	6.8			2.1			(0.3		)	10.4			(54.1		)
Unallocated LAE(2)	(5.0		)	(1.7		)	(0.1		)	(0.8		)	(5.4		)	(13.0		)
Other underwriting expenses	(21.3		)	(5.6		)	(5.2		)	(0.9		)	(5.0		)	(38.0		)
Underwriting income	(99.4		)	(0.5		)	(3.2		)	(2.0		)	—			(105.1		)
Service fee revenue(3)	—			35.9			—			—			(11.0		)	24.9
Managing general underwriter unallocated LAE	—			(6.0		)	—			—			6.0			—
Managing general underwriter other underwriting expenses	—			(5.0		)	—			—			5.0			—
General and administrative expenses, MGU + Runoff & Other(4)	—			(14.2		)	—			(1.5		)	—			(15.7		)
Underwriting (loss) income, including net service fee income	(99.4		)	10.2			(3.2		)	(3.5		)	—			(95.9		)
Net investment income																13.5
Net realized investment gains																20.3
Net unrealized investment (losses) gains																(43.8		)
Net foreign exchange gains																18.5
Other revenue(5)																(20.6		)
General and administrative expenses(6)																(16.4		)
Intangible asset amortization expenses																(3.9		)
Interest expense on debt																(7.8		)
Pre-tax (loss) income																$	(136.1	)
Underwriting Ratios
Loss ratio	111.6		%	69.6		%	60.9		%	NM			NM			98.3		%
Acquisition expense ratio	21.7		%	26.1		%	23.4		%	NM			NM			17.2		%
Other underwriting expense ratio	9.1		%	4.7		%	40.6		%	NM			NM			8.7		%
Combined ratio(7)	142.4		%	100.4		%	124.9		%	NM			NM			124.2		%
Goodwill and intangible assets(8)	$	—		$	568.6		$	—		$	8.1		$	—		$	576.7

⁽¹⁾Loss and allocated loss adjustment expenses ("LAE") are part of Loss and loss adjustment expenses on the Consolidated Statements of Income (the sum of Loss and allocated LAE and Unallocated LAE is equal to Loss and loss adjustment expenses on the Consolidated Statements of Income).

⁽²⁾Unallocated LAE are part of Loss and loss adjustment expenses on the Consolidated Statements of Income (the sum of Loss and allocated LAE and Unallocated LAE is equal to Loss and loss adjustment expenses on the Consolidated Statements of Income).

⁽³⁾Service fee revenue is part of Other revenue on the Consolidated Statements of Income (the sum of Service fee revenue and Other revenue is equal to Other revenue on the Consolidated Statements of Income).

⁽⁴⁾General and administrative expenses, MGU + Runoff & Other is part of General and administrative expenses on the Consolidated Statements of Income (the sum of General and administrative expenses, MGU + Runoff & Other and General and administrative expenses is equal to General and administrative expenses on the Consolidated Statements of Income).

⁽⁵⁾Other revenue is presented net of Service fee revenue and is comprised mainly of losses from derivatives (seeNote 12) (the sum of Service fee revenue and Other revenue is equal to Other revenue on the Consolidated Statements of Income).

⁽⁶⁾General and administrative expenses are presented net of General and administrative expenses, MGU + Runoff & Other (the sum of General and administrative expenses, MGU + Runoff & Other and General and administrative expenses is equal to General and administrative expenses on the Consolidated Statements of Income).

⁽⁷⁾Ratios considered not meaningful ("NM") to Runoff & Other and Corporate Elimination.

⁽⁸⁾Sirius Group does not allocate its assets by segment, with the exception of goodwill and intangible assets.

	For the three months ended March 31, 2019
(Expressed in millions of U.S. dollars)	Global Reinsurance			Global A&H			U.S. Specialty			Runoff & Other			Corporate Elimination			Total
Gross written premiums	$	435.0		$	169.3		$	16.6		$	1.4		$	—		$	622.3
Net written premiums	$	335.9		$	134.9		$	13.6		$	0.4		$	—		$	484.8
Net earned insurance and reinsurance premiums	$	211.3		$	96.1		$	4.1		$	0.4		$	—		$	311.9
Loss and allocated LAE(1)	(107.8		)	(63.2		)	(2.4		)	(1.1		)	—			(174.5		)
Insurance and reinsurance acquisition expenses	(45.6		)	(26.6		)	(0.7		)	(0.7		)	10.3			(63.3		)
Technical profit	57.9			6.3			1.0			(1.4		)	10.3			74.1
Unallocated LAE(2)	(4.0		)	(1.5		)	—			(0.5		)	(3.4		)	(9.4		)
Other underwriting expenses	(21.6		)	(6.1		)	(2.8		)	(2.1		)	(2.7		)	(35.3		)
Underwriting income	32.3			(1.3		)	(1.8		)	(4.0		)	4.2			29.4
Service fee revenue(3)	—			36.3			—			—			(11.0		)	25.3
Managing general underwriter unallocated LAE	—			(4.1		)	—			—			4.1			—
Managing general underwriter other underwriting expenses	—			(2.7		)	—			—			2.7			—
General and administrative expenses, MGU + Runoff & Other(4)	—			(16.2		)	—			(0.8		)	—			(17.0		)
Underwriting (loss) income, including net service fee income	32.3			12.0			(1.8		)	(4.8		)	—			37.7
Net investment income																20.1
Net realized investment gains																9.0
Net unrealized investment (losses) gains																74.0
Net foreign exchange gains																5.1
Other revenue(5)																(5.7		)
General and administrative expenses(6)																(7.4		)
Intangible asset amortization expenses																(3.9		)
Interest expense on debt																(7.6		)
Pre-tax (loss) income																$	121.3
Underwriting Ratios
Loss ratio	52.9		%	67.3		%	58.5		%	NM			NM			59.0		%
Acquisition expense ratio	21.6		%	27.7		%	17.1		%	NM			NM			20.3		%
Other underwriting expense ratio	10.2		%	6.3		%	68.3		%	NM			NM			11.3		%
Combined ratio(7)	84.7		%	101.3		%	143.9		%	NM			NM			90.6		%
Goodwill and intangible assets(8)	$	—		$	584.2		$	—		$	8.1		$	—		$	592.3

⁽¹⁾Loss and allocated LAE are part of Loss and loss adjustment expenses on the Consolidated Statements of Income (the sum of Loss and allocated LAE and Unallocated LAE is equal to Loss and loss adjustment expenses on the Consolidated Statements of Income).

⁽²⁾Unallocated LAE are part of Loss and loss adjustment expenses on the Consolidated Statements of Income (the sum of Loss and allocated LAE and Unallocated LAE is equal to Loss and loss adjustment expenses on the Consolidated Statements of Income).

⁽³⁾Service fee revenue is part of Other revenue on the Consolidated Statements of Income (the sum of Service fee revenue and Other revenue is equal to Other revenue on the Consolidated Statements of Income).

⁽⁴⁾General and administrative expenses, MGU + Runoff & Other is part of General and administrative expenses on the Consolidated Statements of Income (the sum of General and administrative expenses, MGU + Runoff & Other and General and administrative expenses is equal to General and administrative expenses on the Consolidated Statements of Income).

⁽⁵⁾Other revenue is presented net of Service fee revenue and is comprised mainly of losses from derivatives (seeNote 12) (the sum of Service fee revenue and Other revenue is equal to Other revenue on the Consolidated Statements of Income).

⁽⁶⁾General and administrative expenses are presented net of General and administrative expenses, MGU + Runoff & Other (the sum of General and administrative expenses, MGU + Runoff & Other and General and administrative expenses is equal to General and administrative expenses on the Consolidated Statements of Income).

⁽⁷⁾Ratios considered not meaningful ("NM") to Runoff & Other and Corporate Elimination.

⁽⁸⁾Sirius Group does not allocate its assets by segment, with the exception of goodwill and intangible assets.

The following tables provide summary information regarding net premiums written by client location and underwriting location by reportable segment for the three months ended March 31, 2020 and 2019:

	For the three months ended March 31, 2020
(Expressed in millions of U.S. dollars)	Global Reinsurance		Global A&H		U.S. Specialty		Runoff & Other		Total
Net written premiums by client location:
United States	$	104.3	$	180.7	$	15.2	$	68.1	$	368.3
Europe	172.8		7.2		—		0.3		180.3
Canada, the Caribbean, Bermuda and Latin America	29.4		6.5		—		—		35.9
Asia and Other	38.9		6.3		—		0.2		45.4
Total net written premium by client location for the three months ended March 31, 2020	$	345.4	$	200.7	$	15.2	$	68.6	$	629.9
Net written premiums by underwriting location:
United States	$	72.6	$	131.2	$	15.2	$	68.0	$	287.0
Europe	208.2		69.5		—		0.4		278.1
Canada, the Caribbean, Bermuda and Latin America	48.1		—		—		—		48.1
Asia and Other	16.5		—		—		0.2		16.7
Total written premiums by underwriting location for the three months ended March 31, 2020	$	345.4	$	200.7	$	15.2	$	68.6	$	629.9

	For the three months ended March 31, 2019
(Expressed in millions of U.S. dollars)	Global Reinsurance		Global A&H		U.S. Specialty		Runoff & Other		Total
Net written premiums by client location:
United States	$	116.6	$	111.1	$	13.6	$	0.2	$	241.5
Europe	149.5		8.0		—		0.1		157.6
Canada, the Caribbean, Bermuda and Latin America	29.0		5.0		—		—		34.0
Asia and Other	40.8		10.8		—		0.1		51.7
Total net written premium by client location for the three months ended March 31, 2019	$	335.9	$	134.9	$	13.6	$	0.4	$	484.8
Net written premiums by underwriting location:
United States	$	75.7	$	71.0	$	13.6	$	0.2	$	160.5
Europe	207.0		63.6		—		0.1		270.7
Canada, the Caribbean, Bermuda and Latin America	35.9		—		—		—		35.9
Asia and Other	17.3		0.3		—		0.1		17.7
Total written premiums by underwriting location for the three months ended March 31, 2019	$	335.9	$	134.9	$	13.6	$	0.4	$	484.8

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Investment securities

3 Months Ended

Mar. 31, 2020

Investments, Debt and Equity Securities [Abstract]

Investment securities

Investment securities

Sirius Group's invested assets consist of investment securities and other long-term investments held for general investment purposes. The portfolio of investment securities includes fixed maturity investments, short-term investments, equity securities, and other-long term investments which are all classified as trading securities. Realized and unrealized investment gains and losses on trading securities are reported in pre-tax revenues.

Net Investment Income

Sirius Group's net investment income is comprised primarily of interest income along with associated amortization of premium and accretion of discount on Sirius Group's fixed maturity investments, dividend income from its equity investments, and interest income from its short-term investments.

Net investment income for the three months ended March 31, 2020 and 2019 consisted of the following:

	For the three months ended March 31,
(Millions)	2020			2019
Fixed maturity investments	$	10.3		$	16.8
Short-term investments	3.3			0.4
Equity securities	2.6			2.7
Other long-term investments	0.2			3.9
Total investment income	16.4			23.8
Investment expenses	(2.9		)	(3.7		)
Net investment income	$	13.5		$	20.1

Net Realized and Unrealized Investment Gains (Losses)

Net realized and unrealized investment gains (losses) for the three months ended March 31, 2020 and 2019 consisted of the following:

	For the three months ended March 31,
(Millions)	2020			2019
Gross realized gains	$	42.0		$	14.1
Gross realized (losses)	(21.7		)	(5.1		)
Net realized gains on investments(1)	20.3			9.0
Net unrealized gains (losses) on investments(2)	(43.8		)	74.0
Net realized and unrealized gains (losses) on investments	$	(23.5	)	$	83.0

⁽¹⁾Includes $11.1 and $10.9 of realized gains due to foreign currency for the three months ended March 31, 2020 and 2019, respectively.

⁽²⁾Includes $52.7 and $25.0 of unrealized gains due to foreign currency for the three months ended March 31, 2020 and 2019, respectively.

Net realized investment gains

Net realized investment gains for the three months ended March 31, 2020 and 2019 consisted of the following:

	For the three months ended March 31,
(Millions)	2020		2019
Fixed maturity investments	$	7.8	$	6.8
Equity securities	0.5		(0.6		)
Short-term investments	2.8		0.1
Derivative instruments	8.3		(0.6		)
Other long-term investments	0.9		3.3
Net realized investment gains	$	20.3	$	9.0

Net unrealized investment gains (losses)

Net unrealized investment gains (losses) for the three months ended March 31, 2020 and 2019 consisted of the following:

	For the three months ended March 31,
(Millions)	2020			2019
Fixed maturity investments	$	7.9		$	29.7
Equity securities	(69.1		)	25.1
Short-term investments	15.7			2.7
Derivative instruments	0.1			(0.6		)
Other long-term investments	1.6			17.1
Net unrealized investment gains (losses)	$	(43.8	)	$	74.0

The following table summarizes the amount of total gains (losses) included in earnings attributable to unrealized investment gains (losses) for Level 3 investments for the three months ended March 31, 2020 and 2019:

	For the three months ended March 31,
(Millions)	2020			2019
Fixed maturity investments	$	0.3		$	—
Equity securities	—			—
Other long-term investments	(0.9		)	8.8
Total unrealized investment (losses) gains – Level 3 investments	$	(0.6	)	$	8.8

Investment Holdings

Fixed maturity investments

The cost or amortized cost, gross unrealized investment gains (losses), net foreign currency gains (losses), and fair value of Sirius Group's fixed maturity investments as of March 31, 2020 and December 31, 2019, were as follows:

	March 31, 2020
(Millions)	Cost or amortized cost		Gross unrealized gains		Gross unrealized (losses)			Net foreign currency gains (losses)		Fair value
Corporate debt securities	$	424.5	$	2.8	$	(5.0	)	$	22.0	$	444.3
Asset-backed securities	551.9		1.9		(30.1		)	0.7		524.4
Residential mortgage-backed securities	443.5		23.1		(1.2		)	6.5		471.9
U.S. government and government agency	119.9		6.8		(0.1		)	1.6		128.2
Commercial mortgage-backed securities	97.4		1.6		(5.0		)	0.3		94.3
Non-U.S. government and government agency	60.4		0.4		(0.4		)	0.4		60.8
Preferred stocks	5.8		0.9		(0.2		)	—		6.5
U.S. States, municipalities and political subdivision	1.6		—		—			0.1		1.7
Total fixed maturity investments	$	1,705.0	$	37.5	$	(42.0	)	$	31.6	$	1,732.1

	December 31, 2019
(Millions)	Cost or amortized cost		Gross unrealized gains		Gross unrealized (losses)			Net foreign currency gains (losses)			Fair value
Corporate debt securities	$	458.6	$	5.2	$	(1.2	)	$	11.5		$	474.1
Asset-backed securities	489.4		1.4		(3.9		)	(0.1		)	486.8
Residential mortgage-backed securities	426.2		10.5		(1.4		)	3.6			438.9
U.S. government and government agency	111.5		0.7		(0.4		)	(1.3		)	110.5
Commercial mortgage-backed securities	88.5		0.9		(0.6		)	0.2			89.0
Non-U.S. government and government agency	63.7		—		(0.7		)	—			63.0
Preferred stocks	17.0		—		—			—			17.0
U.S. States, municipalities and political subdivision	1.7		—		—			—			1.7
Total fixed maturity investments	$	1,656.6	$	18.7	$	(8.2	)	$	13.9		$	1,681.0

The weighted average duration of Sirius Group's fixed income portfolio as of March 31, 2020 was approximately 1.5 years, including short-term investments, and approximately 2.3 years excluding short-term investments.

The cost or amortized cost and fair value of Sirius Group's fixed maturity investments as of March 31, 2020 and December 31, 2019 are presented below by contractual maturity. Actual maturities could differ from contractual maturities because borrowers may have the right to call or prepay certain obligations with or without call or prepayment penalties.

	March 31, 2020				December 31, 2019
(Millions)	Cost or amortized cost		Fair value		Cost or amortized cost		Fair value
Due in one year or less	$	106.2	$	112.9	$	85.0	$	88.4
Due after one year through five years	429.1		446.3		479.1		490.3
Due after five years through ten years	45.9		47.0		46.3		46.0
Due after ten years	25.2		28.8		25.1		24.6
Mortgage-backed and asset-backed securities	1,092.8		1,090.6		1,004.1		1,014.7
Preferred stocks	5.8		6.5		17.0		17.0
Total	$	1,705.0	$	1,732.1	$	1,656.6	$	1,681.0

The following table summarizes the ratings and fair value of fixed maturity investments held in Sirius Group's investment portfolio as of March 31, 2020 and December 31, 2019:

(Millions)	March 31, 2020		December 31, 2019
AAA	$	588.4	$	559.8
AA	786.8		724.3
A	208.5		219.0
BBB	88.0		95.8
Other	60.4		82.1
Total fixed maturity investments(1)	$	1,732.1	$	1,681.0

⁽¹⁾Credit ratings are assigned based on the following hierarchy: 1) Standard & Poor's ("S&P") and 2) Moody's Investors Service ("Moody's").

At March 31, 2020, the above totals included $37.8 million of sub-prime securities. Of this total, $18.3 million was rated AAA, $17.2 million rated AA, $2.2 million rated A and $0.1 million classified as Other. At December 31, 2019, the above totals included $43.3 million of sub-prime securities. Of this total, $21.7 million was rated AAA, $18.4 million rated AA, $3.1 million rated A and $0.1 million classified as Other.

Equity securities and Other long-term investments

The cost or amortized cost, gross unrealized investment gains and losses, net foreign currency gains, and fair values of Sirius Group's equity securities and other long-term investments as of March 31, 2020 and December 31, 2019, were as follows:

	March 31, 2020
(Millions)	Cost or amortized cost		Gross unrealized gains		Gross unrealized losses			Net foreign currency gains		Fair value
Equity securities	$	409.5	$	37.4	$	(98.4	)	$	18.1	$	366.6
Other long-term investments	$	323.2	$	50.3	$	(31.7	)	$	13.7	$	355.5

	December 31, 2019
(Millions)	Cost or amortized cost		Gross unrealized gains		Gross unrealized losses			Net foreign currency gains		Fair value
Equity securities	$	379.2	$	55.6	$	(37.3	)	$	7.7	$	405.2
Other long-term investments	$	315.4	$	49.9	$	(29.3	)	$	10.8	$	346.8

Equity securities at fair value consisted of the following as of March 31, 2020 and December 31, 2019:

(Millions)	March 31, 2020			December 31, 2019
Fixed income mutual funds	$	192.1		$	175.3
Common stocks	184.4			228.1
Other equity securities(1)	(9.9		)	1.8
Total Equity securities	$	366.6		$	405.2

⁽¹⁾Sirius Group engaged in short selling of certain equity securities for which settlement was pending as of March 31, 2020.

Other long-term investments at fair value consisted of the following as of March 31, 2020 and December 31, 2019:

(Millions)	March 31, 2020		December 31, 2019
Hedge funds and private equity funds	$	279.6	$	269.0
Limited liability companies and private equity securities	75.9		77.8
Total other long-term investments	$	355.5	$	346.8

Hedge Funds and Private Equity Funds

Sirius Group holds investments in hedge funds and private equity funds, which are included in other long-term investments. The fair value of these investments has been estimated using the net asset value of the funds. As of March 31, 2020, Sirius Group held investments in 9 hedge funds and 33 private equity funds. The largest investment in a single fund was $59.4 million as of March 31, 2020 and $51.6 million as of December 31, 2019.

The following table summarizes investments in hedge funds and private equity interests by investment objective and sector as of March 31, 2020 and December 31, 2019:

	March 31, 2020				December 31, 2019
(Millions)	Fair value		Unfunded commitments		Fair value		Unfunded commitments
Hedge funds:
Long/short multi-sector	$	49.5	$	—	$	53.0	$	—
Distressed mortgage credit	59.4		—		51.6		—
Private credit	21.8		—		21.5		—
Other	1.1		—		1.4		—
Total hedge funds	131.8		—		127.5		—
Private equity funds:
Energy infrastructure & services	51.5		34.1		53.6		34.6
Multi-sector	16.0		7.8		8.7		7.8
Healthcare	28.2		6.8		25.9		10.4
Life settlement	22.9		—		23.9		—
Manufacturing/Industrial	26.3		—		27.6		3.9
Private equity secondaries	0.6		0.8		0.6		0.8
Other	2.3		1.8		1.2		2.6
Total private equity funds	147.8		51.3		141.5		60.1
Total hedge and private equity funds included in Other long-term investments	$	279.6	$	51.3	$	269.0	$	60.1

Redemption of investments in certain hedge funds is subject to restrictions including lock-up periods where no redemptions or withdrawals are allowed, restrictions on redemption frequency, and advance notice periods for redemptions. Amounts requested for redemptions remain subject to market fluctuations until the redemption effective date, which generally falls at the end of the defined redemption period.

The following summarizes the March 31, 2020 fair value of hedge funds subject to restrictions on redemption frequency and advance notice period requirements for investments in active hedge funds:

	Notice Period
Redemption Frequency (Millions)	30-59 days notice		60-89 days notice		90-119 days notice		120+ days notice		Total
Monthly	$	—	$	33.5	$	—	$	—	$	33.5
Quarterly	0.6		—		—		—		0.6
Semi-annual	—		0.2		—		—		0.2
Annual	—		16.0		59.6		21.9		97.5
Total	$	0.6	$	49.7	$	59.6	$	21.9	$	131.8

Certain of the hedge fund and private equity fund investments in which Sirius Group is invested are no longer active and are in the process of disposing of their underlying investments. Distributions from such funds are remitted to investors as the fund's underlying investments are liquidated. As of March 31, 2020, no distributions were outstanding from these investments.

Investments in private equity funds are generally subject to a "lock-up" period during which investors may not request a redemption. Distributions prior to the expected termination date of the fund may be limited to dividends or proceeds arising from the liquidation of the fund's underlying investments. In addition, certain private equity funds provide an option to extend the lock-up period at either the sole discretion of the fund manager or upon agreement between the fund and the investors.

As of March 31, 2020, investments in private equity funds were subject to lock-up periods as follows:

(Millions)	1 - 3 years		3 – 5 years		5 – 10 years		Total
Private Equity Funds – expected lock up period remaining	$	9.1	$	2.1	$	136.6	$	147.8

Investments Held on Deposit or as Collateral

As of March 31, 2020 and December 31, 2019 investments of $971.1 million and $1,309.5 million, respectively, were held in trusts required to be maintained in relation to various reinsurance agreements. Sirius Group's reinsurance operations are required to maintain deposits with certain insurance regulatory agencies in order to maintain their insurance licenses. The fair value of such deposits that are included within total investments totaled $1,002.8 million and $1,315.5 million as of March 31, 2020 and December 31, 2019, respectively.

As of March 31, 2020, Sirius Group held $0.2 million of collateral in the form of short-term investments associated with Interest Rate Cap agreements. (See Note 12.)

Unsettled investment purchases and sales

As of March 31, 2020 and December 31, 2019 Sirius Group reported $53.0 million and $2.3 million, respectively, in Accounts payable on unsettled investment purchases.

As of March 31, 2020 and December 31, 2019, Sirius Group reported $35.2 million and $6.7 million, respectively, in Accounts receivable on unsettled investment sales.

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Commitments and contingencies - Weighted average remaining lease term and weighted average discount rate (Details)	Mar. 31, 2020
Leased offices
Property, Plant and Equipment [Line Items]
Weighted average lease term (years)	7 years
Weighted average discount rate:	3.60%
Leased equipment
Property, Plant and Equipment [Line Items]
Weighted average lease term (years)	3 years
Weighted average discount rate:	3.40%

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Common shareholder's equity, mezzanine equity, and non controlling interests - Mezzanine equity (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2020	Dec. 31, 2019	Nov. 05, 2018
Mezzanine equity
Preference shares authorized / designated ( in shares)	100,000,000
Preference shares par value (usd per share)	$ 0.01
Carrying value of preference shares	$ 199.6	$ 223.0
Series B preference shares
Mezzanine equity
Preference shares authorized / designated ( in shares)			15,000,000
Preference shares par value (usd per share)			$ 0.01
Preferential rights, aggregate gross proceeds from the issuance of senior or pari passu shares	$ 100.0
Series B preference shares | Sirius Group Private Placement | Preference Share Investors
Mezzanine equity
Share subscriptions (in shares)			11,901,670

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Share-based compensation - Narrative (Details) - USD ($) $ in Millions		3 Months Ended		12 Months Ended
	Mar. 15, 2020	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense		$ 1.2	$ 0.2
Amount paid to employees for share-based awards		$ 0.3	3.3
Unrecognized share-based compensation costs			$ 34.3
Options granted in the period (in shares)		0	1,374,945
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average recognition period (years)			2 years
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average recognition period (years)			3 years
RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average recognition period (years)		1 year 7 months 30 days
Awards granted in the period (in shares)		0	1,411,714
Retention Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards granted under the retention program	$ 13.8
Amount paid for retention awards	$ 6.9
Retention program expense		$ 6.3
Long Term Incentive Plan 2019 | Performance share units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average recognition period (years)		1 year 9 months
Awards granted in the period (in shares)		0	401,311
Long Term Incentive Plan 2020 | Performance share units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense		$ 1.6
Award vesting period				3 years

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Variable interest entities - Unconsolidated VIE (Details) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Variable interest entities
Other long-term investments	$ 355.5	$ 346.8
Total assets	6,757.6	6,413.8
Unconsolidated VIE
Variable interest entities
Other long-term investments	250.7	257.8
Total assets	250.7	257.8
On-Balance Sheet
Variable interest entities
Other long term investments	103.0	102.6
Total assets	103.0	102.6
Off-Balance Sheet
Variable interest entities
Other long term investments	8.8	16.3
Total assets	8.8	16.3
Other long-term investments
Variable interest entities
Other long term investments	111.8	118.9
Total assets	$ 111.8	$ 118.9

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Investments in unconsolidated entities - Equity method unconsolidated entities (Details) - Investments in unconsolidated entities - Equity method eligible investments	3 Months Ended	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
BE Reinsurance Limited
Investments in unconsolidated entities
Ownership interest	24.90%	24.90%
BioVentures Investors (Offshore) IV LP
Investments in unconsolidated entities
Ownership interest	73.00%	73.00%
Camden Partners Strategic Fund V (Cayman), LP
Investments in unconsolidated entities
Ownership interest	39.40%	39.40%
Diamond LS I LP
Investments in unconsolidated entities
Ownership interest	16.00%	16.00%
Gateway Fund LP
Investments in unconsolidated entities
Ownership interest	19.30%	15.00%
Monarch
Investments in unconsolidated entities
Ownership interest	12.80%	12.80%
New Energy Capital Infrastructure Credit Fund LP
Investments in unconsolidated entities
Ownership interest	30.50%	30.50%
New Energy Capital Infrastructure Offshore Credit Fund LP
Investments in unconsolidated entities
Ownership interest	30.50%	30.50%
Pie Preferred Stock
Investments in unconsolidated entities
Ownership interest	30.10%	30.10%
Pie Series B Preferred Stock
Investments in unconsolidated entities
Ownership interest	22.40%	22.40%
Quintana Energy Partners
Investments in unconsolidated entities
Ownership interest	21.80%	21.80%
Tuckerman Capital V LP
Investments in unconsolidated entities
Ownership interest	48.30%	48.30%
Tuckerman Capital V Co-Investment I LP
Investments in unconsolidated entities
Ownership interest	48.30%	48.10%

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Consolidated Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash flows from operations:
Net (loss) income	$ (121.3)	$ 104.1
Adjustments to reconcile net income to net cash provided from operations:
Net realized and unrealized investment losses (gains)	23.5	(83.0)
Amortization of premium on fixed maturity investments	0.4	(0.8)
Amortization of intangible assets	3.9	3.9
Depreciation and other amortization	1.7	2.2
Share-based compensation	1.9	1.2
Other operating items:
Net change in loss and loss adjustment expense reserves	278.6	(1.1)
Net change in reinsurance recoverable on paid and unpaid losses	(91.1)	(8.7)
Net change in funds held by ceding companies	22.5	(20.1)
Net change in unearned insurance and reinsurance premiums	309.5	232.4
Net change in ceded reinsurance payable	111.3	37.7
Net change in ceded unearned insurance and reinsurance premiums	(96.6)	(47.6)
Net change in insurance and reinsurance premiums receivable	(280.5)	(208.8)
Net change in deferred acquisition costs	(26.4)	(14.2)
Net change in funds held under reinsurance treaties	(12.7)	15.4
Net change in current and deferred income taxes, net	(11.5)	9.1
Net change in other assets and liabilities, net	2.0	2.9
Net cash provided from operations	115.2	24.6
Cash flows from investing activities:
Net change in short-term investments	33.8	(120.1)
Sales of fixed maturities and convertible fixed maturity investments	99.3	135.1
Maturities, calls, and paydowns of fixed maturity and convertible fixed maturity investments	62.0	59.3
Sales of common equity securities	205.0	45.9
Distributions, redemptions, and maturities of other long-term investments	7.4	15.3
Return of principal on loan participations	0.1	0.0
Contributions to other long-term investments	(17.6)	(25.0)
Purchases of common equity securities	(253.6)	(39.8)
Purchases of fixed maturities and convertible fixed maturity investments	(261.2)	(105.1)
Net change in unsettled investment purchases and sales	22.5	10.0
Other, net	(0.4)	0.3
Net cash (used for) investing activities	(102.7)	(24.1)
Cash flows from financing activities:
Change in collateral held on Interest Rate Cap	0.0	(0.1)
Net cash (used for) from financing activities	0.0	(0.1)
Effect of exchange rate changes on cash	(7.3)	(3.6)
Net increase (decrease) in cash during period	5.2	(3.2)
Cash and restricted cash balance at beginning of period	150.6	132.2
Cash and restricted cash balance at end of period	$ 155.8	$ 129.0

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Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Statement of Financial Position [Abstract]
Fixed maturity investments, trading, amortized cost	$ 1,705.0	$ 1,656.6
Short-term investments, amortized cost	1,032.7	1,090.8
Equity securities, at cost	409.5	379.2
Other long-term investments, cost	$ 323.2	$ 315.4
Shares issued (in shares)	115,299,341	115,299,341
Shares outstanding (in shares)	115,299,341	115,299,341

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Investment securities - Hedge funds and Private equity funds (Details) - Other long-term investments $ in Millions	3 Months Ended
	Mar. 31, 2020 USD ($) fund	Dec. 31, 2019 USD ($)
Equity securities and Other long-term investments
Fair value	$ 355.5	$ 346.8
Hedge funds and private equity funds
Equity securities and Other long-term investments
Fair value	279.6	269.0
Unfunded commitments	$ 51.3	60.1
Hedge funds:
Equity securities and Other long-term investments
Number of investment funds in which the investments are held | fund	9
Fair value	$ 131.8	127.5
Unfunded commitments	0.0	0.0
Long/short multi-sector
Equity securities and Other long-term investments
Fair value	49.5	53.0
Unfunded commitments	0.0	0.0
Distressed mortgage credit
Equity securities and Other long-term investments
Fair value	59.4	51.6
Unfunded commitments	0.0	0.0
Private credit
Equity securities and Other long-term investments
Fair value	21.8	21.5
Unfunded commitments	0.0	0.0
Other
Equity securities and Other long-term investments
Fair value	1.1	1.4
Unfunded commitments	$ 0.0	0.0
Private equity funds:
Equity securities and Other long-term investments
Number of investment funds in which the investments are held | fund	33
Fair value	$ 147.8	141.5
Unfunded commitments	51.3	60.1
Energy infrastructure & services
Equity securities and Other long-term investments
Fair value	51.5	53.6
Unfunded commitments	34.1	34.6
Multi-sector
Equity securities and Other long-term investments
Fair value	16.0	8.7
Unfunded commitments	7.8	7.8
Healthcare
Equity securities and Other long-term investments
Fair value	28.2	25.9
Unfunded commitments	6.8	10.4
Life settlement
Equity securities and Other long-term investments
Fair value	22.9	23.9
Unfunded commitments	0.0	0.0
Manufacturing/Industrial
Equity securities and Other long-term investments
Fair value	26.3	27.6
Unfunded commitments	0.0	3.9
Private equity secondaries
Equity securities and Other long-term investments
Fair value	0.6	0.6
Unfunded commitments	0.8	0.8
Other
Equity securities and Other long-term investments
Fair value	2.3	1.2
Unfunded commitments	$ 1.8	$ 2.6

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Fair value measurements - Rollforward of level 3 fair value measurements (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Rollforward of Level 3, Derivative instruments assets & (liabilities)
Balance at beginning of the period	$ 0.8	$ (0.5)
Total realized and unrealized gains (losses)	(13.3)	(5.1)
Purchases	0.0	0.0
Sales/Settlements	3.6	0.8
Balance at end of the period	(8.9)	(4.8)
Hedge funds and private equity funds
Rollforward of Level 3, (liabilities)
Fair value of hedges	279.6	301.7	$ 269.0
Fixed maturity investments
Rollforward of Level 3 Fair Value Measurements
Balance at beginning of the period	17.0	5.4
Total realized and unrealized gains (losses)	2.6	0.0
Purchases	0.0	0.0
Sales/Settlements	(17.0)	(5.4)
Balance at end of the period	2.6	0.0
Other long-term investments
Rollforward of Level 3 Fair Value Measurements
Balance at beginning of the period	77.8	63.6
Total realized and unrealized gains (losses)	(0.9)	9.3
Purchases	0.0	15.8
Sales/Settlements	0.0	0.0
Balance at end of the period	75.9	88.0
Loan participation
Rollforward of Level 3 Fair Value Measurements
Balance at beginning of the period	20.0	0.0
Total realized and unrealized gains (losses)	0.0	0.0
Purchases	0.0	0.0
Sales/Settlements	(0.1)	0.0
Balance at end of the period	19.9	0.0
Contingent consideration (liabilities)
Rollforward of Level 3, (liabilities)
Balance at beginning of the period	(28.2)	(28.8)
Total realized and unrealized gains (losses)	(0.1)	0.0
Foreign currency gains (losses) through Other Comprehensive Income	0.0	0.0
Purchases	0.0	0.0
Sales/Settlements	0.0	0.0
Balance at end of the period	(28.3)	(28.8)
Other Comprehensive Income Foreign Currency Gain Loss [Member]
Rollforward of Level 3, Derivative instruments assets & (liabilities)
Foreign currency gains (losses) through Other Comprehensive Income	0.0	0.0
Other Comprehensive Income Foreign Currency Gain Loss [Member] | Fixed maturity investments
Rollforward of Level 3 Fair Value Measurements
Gains (losses) through Other Comprehensive Income	0.0	0.0
Other Comprehensive Income Foreign Currency Gain Loss [Member] | Other long-term investments
Rollforward of Level 3 Fair Value Measurements
Gains (losses) through Other Comprehensive Income	(1.0)	(0.7)
Other Comprehensive Income Foreign Currency Gain Loss [Member] | Loan participation
Rollforward of Level 3 Fair Value Measurements
Gains (losses) through Other Comprehensive Income	$ 0.0	$ 0.0

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Derivatives - Classification and fair value of derivatives in consolidated of (loss) income statements (Details) - Derivatives not designated as hedging instruments - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Interest rate cap | Other revenues
Derivatives
Gains (losses) recognized in earnings	$ 0.0	$ (0.1)
Foreign currency swaps | Net foreign exchange gains (losses)
Derivatives
Gains (losses) recognized in earnings	6.0	0.8
Foreign currency forwards | Net foreign exchange gains (losses)
Derivatives
Gains (losses) recognized in earnings	0.5	0.2
Weather derivatives | Other revenues
Derivatives
Gains (losses) recognized in earnings	(20.4)	(6.0)
Equity futures contracts | Net realized investment gains (losses)
Derivatives
Gains (losses) recognized in earnings	2.9	(0.6)
Equity futures contracts | Net unrealized investment gains
Derivatives
Gains (losses) recognized in earnings	(1.0)	(0.2)
Equity put options | Net realized investment gains (losses)
Derivatives
Gains (losses) recognized in earnings	5.5	0.0
Equity put options | Net unrealized investment gains
Derivatives
Gains (losses) recognized in earnings	0.5	(0.4)
Equity warrants | Net unrealized investment gains
Derivatives
Gains (losses) recognized in earnings	$ 0.5	$ 0.0

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Debt and standby letters of credit facilities - 2017 SEK Subordinated Notes and 2016 SIG Senior Notes (Details)				3 Months Ended
	Sep. 22, 2017 USD ($)	Sep. 22, 2017 SEK (kr)	Nov. 01, 2016 USD ($)	Mar. 31, 2020 USD ($)	Mar. 31, 2019 USD ($)	Dec. 31, 2019 USD ($)	Sep. 22, 2017 SEK (kr)
Debt and standby letters of credit facilities
Interest expense on debt				$ 7,800,000	$ 7,600,000
2017 SEK Subordinated Notes
Debt and standby letters of credit facilities
Debt notes issued	$ 346,100,000			274,200,000		$ 295,000,000	kr 2,750,000,000
Issue price (as a percent)	100.00%	100.00%
Term of redemption following occurrence of Specified Event (in days)	90 days	90 days
Debt issuance costs	$ 4,600,000
Underwriting fees	$ 3,500,000	kr 27,500,000
Foreign currency exchange (losses) gains on remeasurement of debt				$ 20,600,000	$ 11,000,000
Effective rate				4.20%	3.70%
Interest expense on debt				$ 3,000,000	$ 2,800,000
Effective rate				4.20%		4.00%
2016 SIG Senior Notes
Debt and standby letters of credit facilities
Debt notes issued			$ 400,000,000	$ 400,000,000		$ 400,000,000
Issue price (as a percent)			99.209%
Debt issuance costs			$ 5,100,000
Underwriting fees			3,400,000
Interest expense on debt				$ 4,800,000	$ 4,800,000
Net proceeds			$ 392,400,000
Annual interest rate (as a percent)			4.60%
Effective rate				4.70%		4.70%

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Income taxes (Details) - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Income tax expense (benefit)	$ (14,800,000)	$ 17,200,000
Pre-tax income (loss)	$ (136,100,000)	$ 121,300,000
Effective tax rate (as a percent)	10.90%	14.20%
Statutory tax rate (as a percent)	21.40%	21.40%
Tax Cuts and Jobs Act of 2017, BEAT tax rate, 2019-2025 (as a percent)	10.00%
Tax Cuts and Jobs Act of 2017, BEAT tax rate, 2026 and thereafter (as a percent)	12.50%
Provision for income taxes related to BEAT	$ 0		$ 0
Provision for income taxes related to GILTI	$ 0		$ 0

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Reserves for unpaid losses and loss adjustment expenses - By segment (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Reserves for unpaid losses and loss adjustment expenses
Prior years losses	$ 4.2	$ 16.6
Natural catastrophes
Reserves for unpaid losses and loss adjustment expenses
Prior years losses		15.6
Global Reinsurance
Reserves for unpaid losses and loss adjustment expenses
Prior years losses	9.1	10.3
Global A&H
Reserves for unpaid losses and loss adjustment expenses
Prior years losses	$ (4.2)	5.1
Runoff & Other
Reserves for unpaid losses and loss adjustment expenses
Prior years losses		$ 1.2

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Significant transactions - Loss portfolio transfer (Details) $ in Millions	Jan. 23, 2020 USD ($)
Significant transactions
Cash received in loss portfolio transfer agreement	$ 69.7

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Investments in unconsolidated entities

3 Months Ended

Mar. 31, 2020

Investments in unconsolidated entities

Investments in unconsolidated entities

Investments in unconsolidated entities

Sirius Group's investments in unconsolidated entities are included within Other long-term investments and consist of investments in common equity securities or similar instruments, which give Sirius Group the ability to exert significant influence over the investee's operating and financial policies ("equity method eligible unconsolidated entities"). Such investments may be accounted for under either the equity method or, alternatively, Sirius Group may elect to account for them under the fair value option.

The following table presents the components of Other long-term investments as of March 31, 2020 and December 31, 2019:

(Millions)	March 31, 2020		December 31, 2019
Equity method eligible unconsolidated entities, at fair value	$	151.8	$	151.9
Other unconsolidated investments, at fair value(1)	203.7		194.9
Total Other long-term investments(2)	$	355.5	$	346.8

⁽¹⁾Includes Other long-term investments that are not equity method eligible.

⁽²⁾There were no investments accounted for using the equity method as of March 31, 2020 and December 31, 2019.

Equity method eligible unconsolidated entities, at fair value

Sirius Group has elected the fair value option to account for its equity method eligible investments accounted for as part of Other long-term investments for consistency of presentation with the rest of its investment portfolio. The following table presents Sirius Group's investments in equity method eligible unconsolidated entities as of March 31, 2020 and December 31, 2019:

	Ownership interest as of
Investee	March 31, 2020		December 31, 2019		Instrument Held
BE Reinsurance Limited	24.9	%	24.9	%	Common shares
BioVentures Investors (Offshore) IV LP	73.0	%	73.0	%	Units
Camden Partners Strategic Fund V (Cayman), LP	39.4	%	39.4	%	Units
Diamond LS I LP	16.0	%	16.0	%	Units
Gateway Fund LP	19.3	%	15.0	%	Units
Monarch	12.8	%	12.8	%	Units
New Energy Capital Infrastructure Credit Fund LP	30.5	%	30.5	%	Units
New Energy Capital Infrastructure Offshore Credit Fund LP	30.5	%	30.5	%	Units
Pie Preferred Stock(1)	30.1	%	30.1	%	Preferred shares
Pie Series B Preferred Stock(1)	22.4	%	22.4	%	Preferred shares
Quintana Energy Partners	21.8	%	21.8	%	Units
Tuckerman Capital V LP	48.3	%	48.3	%	Units
Tuckerman Capital V Co-Investment I LP	48.3	%	48.1	%	Units

⁽¹⁾Sirius Group holds investments in several financing instruments of Pie Insurance Holding, Inc.

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Summary of significant accounting policies (Policies)

3 Months Ended

Mar. 31, 2020

Accounting Policies [Abstract]

Basis of presentation

Basis of presentation

The accompanying Unaudited Consolidated Financial Statements at March 31, 2020, have been prepared in accordance with generally accepted accounting principles in the United States of America ("GAAP") and the rules and regulations of the U.S. Securities and Exchange Commission ("SEC") for interim financial information. The accompanying Unaudited Consolidated Financial Statements present the consolidated results of operations, financial condition, and cash flows of the Company and its subsidiaries and those entities in which the Company has control and a majority economic interest as well as those variable interest entities ("VIEs") that meet the requirements for consolidation. All significant intercompany transactions have been eliminated in consolidation.

These Unaudited Consolidated Financial Statements do not include all disclosures normally included in annual financial statements prepared in accordance with GAAP and should be read in conjunction with the Audited Consolidated Financial Statements and the related notes for the year ended December 31, 2019. The consolidated financial information as of December 31, 2019 included herein has been derived from the Audited Consolidated Financial Statements as of December 31, 2019.

Effective January 1, 2020, the Company changed its reportable segments. The change in reportable segments had no impact on the Company’s historical consolidated financial positions, results of operations or cash flows as previously reported. Where applicable, all prior periods presented have been revised to conform to this new presentation.

The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities as of the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. In the opinion of management, the accompanying Unaudited Consolidated Financial Statements reflect all adjustments (consisting of normally recurring accruals) necessary for a fair statement of results on an interim basis. Tabular dollar amounts are in millions, with the exception of share and per share amounts. All amounts are reported in U.S. dollars, except where noted otherwise.

Recently adopted changes in accounting principles and accounting pronouncements

Recently adopted changes in accounting principles

Credit losses

Effective January 1, 2020, Sirius Group adopted Accounting Standards Update ("ASU") 2016-13, Measurement of Credit Losses on Financial Instruments (ASC 326), which establishes new guidance for the recognition of credit losses for financial assets measured at amortized cost ("current expected credit losses" or "CECL"). The guidance applies to financial assets that have the contractual right to receive cash, including reinsurance receivables and recoverables and requires reporting entities to estimate the credit losses expected over the life of a credit exposure using historical information, current information and reasonable and supportable forecasts that affect the collectability of the financial asset. The expected credit losses, and subsequent adjustments to such losses, are recorded through an allowance account that is deducted from the amortized cost basis of the financial asset, with the net carrying value of the financial asset presented on the consolidated balance sheet at the amount expected to be collected. Sirius Group adopted the new guidance using a modified retrospective transition method through a cumulative-effect adjustment to retained earnings.

As a result of the adoption of the new guidance, Sirius Group estimated a total CECL allowance of $14.9 million. The adoption of this guidance did not materially impact our results of operations or cash flows. Due to the adoption of the standard using the retrospective cumulative-effect adjustment method, the Company recorded $(6.8) million cumulative-effect adjustment net of taxes to its opening retained earnings. (See Note 7.)

Fair Value Measurement Disclosures

Effective January 1, 2020, Sirius Group adopted ASU 2018-13, Fair Value Measurement (Topic 820): Disclosure Framework—Changes to the Disclosure Requirements for Fair Value Measurement, which modifies the disclosure requirements of fair value measurements. The adoption of this guidance did not have any impact on the consolidated financial statements but expanded disclosure of the ranges and weighted averages of significant unobservable inputs used in Level 3 fair values. (See Note 9.)

Simplifying the Accounting for Income Taxes

Effective January 1, 2020, Sirius Group adopted ASU 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes, which eliminates certain exceptions, and clarifies and simplifies certain aspects of accounting for income taxes. Sirius Group has fully adopted all provisions of the guidance with consideration of the various transition methods.

Sirius Group adopted the removal of the exception to the general methodology for calculating income taxes in an interim period when a year-to-date loss exceeds the anticipated loss for the year. The removal of this exception allowed Sirius Group to record a benefit for a year-to-date loss in excess of its forecasted loss in certain jurisdictions. The removal of this exception was applied prospectively to the Income tax benefit (expense) line on the Consolidated Statements of Income.

Sirius Group adopted all other provisions in the guidance, including the requirement for an entity to recognize a franchise tax (or similar tax) that is partially based on income as an income-based tax and account for any incremental amount incurred as a non-income-based tax through a cumulative-effect adjustment to retained earnings. These provisions did not have a material impact on the Consolidated Financial Statements or were not applicable to Sirius Group.

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Debt and standby letters of credit facilities (Details)	Mar. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Sep. 22, 2017 USD ($)	Sep. 22, 2017 SEK (kr)	Nov. 01, 2016 USD ($)
Debt and standby letters of credit facilities
Long-term Debt, Total	$ 664,800,000	$ 685,200,000
2017 SEK Subordinated Notes
Debt and standby letters of credit facilities
Debt, at face value	274,200,000	295,000,000	$ 346,100,000	kr 2,750,000,000
Unamortized issuance costs	(3,600,000)	(3,800,000)
Long-term Debt, Total	$ 270,600,000	$ 291,200,000
Effective rate	4.20%	4.00%
2016 SIG Senior Notes
Debt and standby letters of credit facilities
Debt, at face value	$ 400,000,000	$ 400,000,000			$ 400,000,000
Unamortized issuance costs	(3,600,000)	(3,700,000)
Unamortized discount	(2,200,000)	(2,300,000)
Long-term Debt, Total	$ 394,200,000	$ 394,000,000
Effective rate	4.70%	4.70%

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Debt and standby letters of credit facilities - Interest (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Debt Disclosure [Abstract]
Interest expense on debt	$ 7.8	$ 7.6
Total interest paid	$ 2.8	$ 2.7

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Derivatives - Classification and fair value of derivatives in consolidated balance sheets (Details) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Derivatives
Derivative assets	$ 11.7	$ 11.4
Derivative liabilities	20.4	9.5
Interest rate cap | Derivatives not designated as hedging instruments
Derivatives
Notional Value	250.0	250.0
Interest rate cap | Derivatives not designated as hedging instruments | Other assets
Derivatives
Derivative assets	0.0	0.0
Interest rate cap | Derivatives not designated as hedging instruments | Other liabilities
Derivatives
Derivative liabilities	0.0	0.0
Foreign currency swaps | Derivatives not designated as hedging instruments
Derivatives
Notional Value	90.0	90.0
Foreign currency swaps | Derivatives not designated as hedging instruments | Other assets
Derivatives
Derivative assets	2.4	0.0
Foreign currency swaps | Derivatives not designated as hedging instruments | Other liabilities
Derivatives
Derivative liabilities	0.0	3.6
Foreign currency forwards | Derivatives not designated as hedging instruments
Derivatives
Notional Value	(215.2)	(30.0)
Foreign currency forwards | Derivatives not designated as hedging instruments | Other assets
Derivatives
Derivative assets	7.3	2.7
Foreign currency forwards | Derivatives not designated as hedging instruments | Other liabilities
Derivatives
Derivative liabilities	5.7	5.7
Weather derivatives | Derivatives not designated as hedging instruments
Derivatives
Notional Value	105.9	110.7
Weather derivatives | Derivatives not designated as hedging instruments | Other assets
Derivatives
Derivative assets	0.0	7.0
Weather derivatives | Derivatives not designated as hedging instruments | Other liabilities
Derivatives
Derivative liabilities	13.9	0.0
Equity futures contracts | Derivatives not designated as hedging instruments
Derivatives
Notional Value	20.1	34.5
Equity futures contracts | Derivatives not designated as hedging instruments | Other assets
Derivatives
Derivative assets	0.0	0.0
Equity futures contracts | Derivatives not designated as hedging instruments | Other liabilities
Derivatives
Derivative liabilities	0.0	0.0
Equity call options | Derivatives not designated as hedging instruments
Derivatives
Notional Value	1.9	0.0
Equity call options | Derivatives not designated as hedging instruments | Other assets
Derivatives
Derivative assets	0.1	0.0
Equity call options | Derivatives not designated as hedging instruments | Other liabilities
Derivatives
Derivative liabilities	0.0	0.0
Equity put options | Derivatives not designated as hedging instruments
Derivatives
Notional Value	11.4	31.0
Equity put options | Derivatives not designated as hedging instruments | Other assets
Derivatives
Derivative assets	1.0	1.3
Equity put options | Derivatives not designated as hedging instruments | Other liabilities
Derivatives
Derivative liabilities	0.8	0.2
Equity warrants | Derivatives not designated as hedging instruments
Derivatives
Notional Value	0.9	0.4
Equity warrants | Derivatives not designated as hedging instruments | Other assets
Derivatives
Derivative assets	0.9	0.4
Equity warrants | Derivatives not designated as hedging instruments | Other liabilities
Derivatives
Derivative liabilities	$ 0.0	$ 0.0

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Third party reinsurance (Details) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Insurance [Abstract]
Reinsurance recoverable on paid losses	$ 85.7	$ 73.9
Reinsurance recoverable on unpaid losses	$ 444.2	$ 410.3

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Segment information - Segment results (Details) $ in Millions	3 Months Ended
	Mar. 31, 2020 USD ($) product segment	Mar. 31, 2019 USD ($)
Segment information
Number of reportable segments | segment	4
Gross written premiums	$ 817.6	$ 622.3
Net written premiums	629.9	484.8
Net earned insurance and reinsurance premiums	434.7	311.9
Loss and allocated LAE	(414.1)	(174.5)
Insurance and reinsurance acquisition expenses	(74.7)	(63.3)
Technical profit	(54.1)	74.1
Unallocated LAE	(13.0)	(9.4)
Other underwriting expenses	(38.0)	(35.3)
Underwriting income (loss)	(105.1)	29.4
Service fee revenue	24.9	25.3
General and administrative expenses, MGU plus Runoff & Other	(32.1)	(24.4)
Underwriting (loss) income, including net service fee income	(95.9)	37.7
Net investment income	13.5	20.1
Net realized investment (losses) gains	20.3	9.0
Net unrealized investment (losses) gains	(43.8)	74.0
Net foreign exchange gains (losses)	18.5	5.1
Other revenue	(20.6)	(5.7)
General and administrative expenses	(16.4)	(7.4)
Intangible asset amortization expenses	(3.9)	(3.9)
Interest expense on debt	(7.8)	(7.6)
Pre-tax (loss) income	$ (136.1)	$ 121.3
Underwriting Ratios
Loss ratio	98.30%	59.00%
Acquisition expense ratio	17.20%	20.30%
Other underwriting expense ratio	8.70%	11.30%
Combined ratio	124.20%	90.60%
Goodwill and intangible assets	$ 576.7	$ 592.3
Managing general underwriters
Segment information
General and administrative expenses, MGU plus Runoff & Other	(15.7)	(17.0)
Corporate Elimination
Segment information
Insurance and reinsurance acquisition expenses	10.4	10.3
Technical profit	10.4	10.3
Unallocated LAE	(5.4)	(3.4)
Other underwriting expenses	(5.0)	(2.7)
Underwriting income (loss)	0.0	4.2
Service fee revenue	(11.0)	(11.0)
Corporate Elimination | Managing general underwriters
Segment information
Unallocated LAE	6.0	4.1
Other underwriting expenses	5.0	2.7
Global Reinsurance | Reportable segments
Segment information
Gross written premiums	465.3	435.0
Net written premiums	345.4	335.9
Net earned insurance and reinsurance premiums	235.0	211.3
Loss and allocated LAE	(257.2)	(107.8)
Insurance and reinsurance acquisition expenses	(50.9)	(45.6)
Technical profit	(73.1)	57.9
Unallocated LAE	(5.0)	(4.0)
Other underwriting expenses	(21.3)	(21.6)
Underwriting income (loss)	(99.4)	32.3
Underwriting (loss) income, including net service fee income	$ (99.4)	$ 32.3
Underwriting Ratios
Loss ratio	111.60%	52.90%
Acquisition expense ratio	21.70%	21.60%
Other underwriting expense ratio	9.10%	10.20%
Combined ratio	142.40%	84.70%
Global A&H | Reportable segments
Segment information
Gross written premiums	$ 262.1	$ 169.3
Net written premiums	200.7	134.9
Net earned insurance and reinsurance premiums	117.9	96.1
Loss and allocated LAE	(80.3)	(63.2)
Insurance and reinsurance acquisition expenses	(30.8)	(26.6)
Technical profit	6.8	6.3
Unallocated LAE	(1.7)	(1.5)
Other underwriting expenses	(5.6)	(6.1)
Underwriting income (loss)	(0.5)	(1.3)
Service fee revenue	35.9	36.3
Underwriting (loss) income, including net service fee income	$ 10.2	$ 12.0
Underwriting Ratios
Loss ratio	69.60%	67.30%
Acquisition expense ratio	26.10%	27.70%
Other underwriting expense ratio	4.70%	6.30%
Combined ratio	100.40%	101.30%
Goodwill and intangible assets	$ 568.6	$ 584.2
Global A&H | Reportable segments | Managing general underwriters
Segment information
Unallocated LAE	(6.0)	(4.1)
Other underwriting expenses	(5.0)	(2.7)
General and administrative expenses, MGU plus Runoff & Other	$ (14.2)	(16.2)
U.S. Specialty
Underwriting Ratios
Number of Core Products | product	4
U.S. Specialty | Reportable segments
Segment information
Gross written premiums	$ 20.8	16.6
Net written premiums	15.2	13.6
Net earned insurance and reinsurance premiums	12.8	4.1
Loss and allocated LAE	(7.7)	(2.4)
Insurance and reinsurance acquisition expenses	(3.0)	(0.7)
Technical profit	2.1	1.0
Unallocated LAE	(0.1)	0.0
Other underwriting expenses	(5.2)	(2.8)
Underwriting income (loss)	(3.2)	(1.8)
Underwriting (loss) income, including net service fee income	$ (3.2)	$ (1.8)
Underwriting Ratios
Loss ratio	60.90%	58.50%
Acquisition expense ratio	23.40%	17.10%
Other underwriting expense ratio	40.60%	68.30%
Combined ratio	124.90%	143.90%
U.S. Specialty | Reportable segments | Minimum
Segment information
Pre-agreed domestic and export sales of goods and services coverage period	60 days
U.S. Specialty | Reportable segments | Maximum
Segment information
Pre-agreed domestic and export sales of goods and services coverage period	120 days
Runoff & Other | Reportable segments
Segment information
Gross written premiums	$ 69.4	$ 1.4
Net written premiums	68.6	0.4
Net earned insurance and reinsurance premiums	69.0	0.4
Loss and allocated LAE	(68.9)	(1.1)
Insurance and reinsurance acquisition expenses	(0.4)	(0.7)
Technical profit	(0.3)	(1.4)
Unallocated LAE	(0.8)	(0.5)
Other underwriting expenses	(0.9)	(2.1)
Underwriting income (loss)	(2.0)	(4.0)
Underwriting (loss) income, including net service fee income	(3.5)	(4.8)
Underwriting Ratios
Goodwill and intangible assets	8.1	8.1
Runoff & Other | Reportable segments | Managing general underwriters
Segment information
General and administrative expenses, MGU plus Runoff & Other	$ (1.5)	$ (0.8)

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Earnings per share

3 Months Ended

Mar. 31, 2020

Earnings Per Share [Abstract]

Earnings per share

Earnings per share

Basic earnings per share is computed by dividing net income available to Sirius Group common shareholders by the weighted-average number of common shares outstanding during the period. Diluted earnings per share is computed by dividing net income (loss) available to Sirius Group common shareholders on a diluted basis by the weighted-average number of common shares outstanding adjusted to give effect to potentially dilutive securities.

The Series B preference shares qualify as participating securities, which requires the application of the two-class method to compute both basic and diluted earnings per share. The two-class method is an earnings allocation formula that treats participating securities as having rights to earnings that would otherwise have been available to common shareholders. The Series B preference shares have no obligation to absorb losses of the Company in periods of net loss.

The following table sets forth the computation of basic and diluted earnings per common share for the three months ended March 31, 2020 and 2019:

	For the three months ended March 31,
(Millions, except share and per share information)	2020			2019
Basic earnings per share
Numerator:
Net income	$	(121.3	)	$	104.1
Less: Income attributable to non-controlling interests	(0.2		)	(0.4		)
Less: Change in carrying value of Series B preference shares	23.4			(8.4		)
Net income available for dividends out of undistributed earnings	$	(98.1	)	$	95.3
Less: Earnings attributable to Series B preference shares	—			(8.9		)
Net income available to Sirius Group common shareholders	$	(98.1	)	$	86.4
Denominator:
Weighted average shares outstanding for basic earnings per share	115,262,302			115,182,331
Basic earnings per share	$	(0.85	)	$	0.75
Diluted earnings per share
Numerator:
Net income available to Sirius Group common shareholders	$	(98.1	)	$	86.4
Add: Change in carrying value of Series B preference shares	(23.4		)	8.4
Net income available to Sirius Group common shareholders on a diluted basis	$	(121.5	)	$	94.8
Denominator:
Weighted average shares outstanding for basic earnings per share	115,262,302			115,182,331
Add: Series B preference shares	11,901,670			11,901,670
Add: Unvested performance share units and restricted share units	—			251,313
Weighted average shares outstanding for diluted earnings per share(1)	127,163,972			127,335,314
Diluted earnings per share	$	(0.96	)	$	0.74

⁽¹⁾For the three months ended March 31, 2020, there were a total of 15,972,398 potentially dilutive securities excluded from the calculation of Diluted earnings per share. For the three months ended March 31, 2019, there were 19,510,830 potentially dilutive securities excluded from the calculation of Diluted earnings per share.

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Commitments and contingencies

3 Months Ended

Mar. 31, 2020

Commitments and Contingencies Disclosure [Abstract]

Commitments and contingencies

Commitments and contingencies

Legal Proceedings

Sirius Group, and the insurance and reinsurance industry in general, are routinely subject to claims related litigation and arbitration in the normal course of business, as well as litigation and arbitration that do not arise from, or are directly related to, claims activity. Sirius Group estimates of the costs of settling matters routinely encountered in claims activity are reflected in the reserves for unpaid loss and LAE. (See Note 5.)

Sirius Group considers the requirements of ASC 450, Contingencies ("ASC 450"), when evaluating its exposure to non-claims related litigation and arbitration. ASC 450 requires that accruals be established for litigation and arbitration if it is probable that a loss has been incurred and it can be reasonably estimated. ASC 450 also requires that litigation and arbitration be disclosed if it is probable that a loss has been incurred or it there is a reasonable possibility that a loss may have been incurred. Management has considered all pending and/or threatened non-claims related litigation and has not identified any matters triggering disclosure under ASC 450.

Leases

Sirius Group leases office space and equipment under various noncancelable operating lease agreements. The average life of the office leases is 7 years and the equipment leases is 3 years.

During the three months ended March 31, 2020 and March 31, 2019, Sirius Group recognized operating lease expense of $3.0 million and $2.6 million, respectively, including property taxes and routine maintenance expense as well as rental expenses related to short term leases. As of March 31, 2020 and December 31, 2019, Sirius Group had $26.1 million and $27.4 million of operating lease right-of-use assets, respectively, included in Other assets. As of March 31, 2020 and December 31, 2019, Sirius Group had $27.8 million and $29.3 million of operating lease liability, respectively, included in Other liabilities.

The following table presents the lease balances within the Consolidated Balance Sheets as of March 31, 2020 and December 31, 2019:

(millions)	Balance Sheet Classification	March 31, 2020		December 31, 2019
Operating lease right-of-use assets	Other assets		$26.1		$27.4
Current lease liabilities	Other liabilities		$7.6		$8.3
Non-current lease liabilities	Other liabilities		$20.2		$21.0

The following table presents weighted average remaining lease term and weighted average discount rate as of March 31, 2020:

Weighted average lease term (years) as at March 31, 2020
Leased offices	7 years
Leased equipment	3 years
Weighted average discount rate:
Leased offices	3.6	%
Leased equipment	3.4	%

The following table presents future annual minimum rental payments required under non-cancellable leases and the present value discount to arrive at total lease liability as of March 31, 2020:

(Millions)	Future Payments
2020	$	6.5
2021	8.1
2022	7.2
2023	4.7
2024	2.3
2025 and after	1.1
Total future annual minimum rental payments as of March 31, 2020	29.9
Less: present value discount	(2.1		)
Total lease liability as of March 31, 2020	$	27.8

As of March 31, 2020, the Company's future operating lease obligations that have not yet commenced are immaterial.

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Earnings per share (Tables)

3 Months Ended

Mar. 31, 2020

Earnings Per Share [Abstract]

Schedule of computation of basic and diluted earnings per common share

The following table sets forth the computation of basic and diluted earnings per common share for the three months ended March 31, 2020 and 2019:

	For the three months ended March 31,
(Millions, except share and per share information)	2020			2019
Basic earnings per share
Numerator:
Net income	$	(121.3	)	$	104.1
Less: Income attributable to non-controlling interests	(0.2		)	(0.4		)
Less: Change in carrying value of Series B preference shares	23.4			(8.4		)
Net income available for dividends out of undistributed earnings	$	(98.1	)	$	95.3
Less: Earnings attributable to Series B preference shares	—			(8.9		)
Net income available to Sirius Group common shareholders	$	(98.1	)	$	86.4
Denominator:
Weighted average shares outstanding for basic earnings per share	115,262,302			115,182,331
Basic earnings per share	$	(0.85	)	$	0.75
Diluted earnings per share
Numerator:
Net income available to Sirius Group common shareholders	$	(98.1	)	$	86.4
Add: Change in carrying value of Series B preference shares	(23.4		)	8.4
Net income available to Sirius Group common shareholders on a diluted basis	$	(121.5	)	$	94.8
Denominator:
Weighted average shares outstanding for basic earnings per share	115,262,302			115,182,331
Add: Series B preference shares	11,901,670			11,901,670
Add: Unvested performance share units and restricted share units	—			251,313
Weighted average shares outstanding for diluted earnings per share(1)	127,163,972			127,335,314
Diluted earnings per share	$	(0.96	)	$	0.74

⁽¹⁾For the three months ended March 31, 2020, there were a total of 15,972,398 potentially dilutive securities excluded from the calculation of Diluted earnings per share. For the three months ended March 31, 2019, there were 19,510,830 potentially dilutive securities excluded from the calculation of Diluted earnings per share.

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Debt and standby letters of credit facilities (Tables)

3 Months Ended

Mar. 31, 2020

Debt Disclosure [Abstract]

Schedule of debt outstanding

Sirius Group's debt outstanding as of March 31, 2020 and December 31, 2019 consisted of the following:

(Millions)	March 31, 2020			Effective Rate(1)		December 31, 2019			Effective Rate(1)
2017 SEK Subordinated Notes, at face value	$	274.2		4.2	%	$	295.0		4.0	%
Unamortized issuance costs	(3.6		)			(3.8		)
2017 SEK Subordinated Notes, carrying value	270.6					291.2
2016 SIG Senior Notes, at face value	400.0			4.7	%	400.0			4.7	%
Unamortized discount	(2.2		)			(2.3		)
Unamortized issuance costs	(3.6		)			(3.7		)
2016 SIG Senior Notes, carrying value	394.2					394.0
Total debt	$	664.8				$	685.2

⁽¹⁾ Effective rate considers the effect of the debt issuance costs.

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Significant transactions

3 Months Ended

Mar. 31, 2020

Significant transactions

Significant transactions

Significant transactions

Loss portfolio transfer

On January 23, 2020, Sirius Group entered into a loss portfolio transfer with Pacific Re, Inc. Under the agreement, Sirius Group received $69.7 million in cash and assumed net undiscounted loss and LAE reserves with the same value. In addition, Sirius Group recognized Gross written premium and Loss and losses adjustment expenses for $69.7 million.

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Allowance for expected credit losses

3 Months Ended

Mar. 31, 2020

Credit Loss [Abstract]

Allowance for expected credit losses

Allowance for expected credit losses

Sirius Group is exposed to credit losses primarily through sales of its insurance and reinsurance products and services. The financial assets in scope of the current expected credit losses impairment model primarily include Sirius Group's premium receivables and reinsurance recoverables. Sirius Group pools the premium receivables and reinsurance recoverables by counterparty credit rating and applies a credit default rate that is determined based on the studies published by the rating agencies (e.g., A.M. Best, Standard & Poor's ("S&P")). In circumstances where ratings are unavailable, Sirius Group applies an internally developed default rate based on historical experience, reference data including research publications, and other relevant inputs.

To estimate the allowance for expected credit losses, Sirius Group considered the current and expected future economic and market conditions surrounding the COVID-19 pandemic. To the extent the current environment continues beyond our expectations or deteriorates further, we may experience further increases to our allowance for credit losses related to COVID-19.

As of March 31, 2020, Sirius Group's allowance for expected credit losses is as follows:

(in millions)	Gross Assets in Scope		Allowance for Expected Credit Losses
Premiums receivable & Funds held by ceding companies	$	1,224.7	$	10.6
Reinsurance recoverable on unpaid and paid loss	529.9		3.9
MGU Trade receivables(1)	25.6		0.4
Total as of March 31, 2020	$	1,780.2	$	14.9

⁽¹⁾Included as part of Other assets on the Consolidated Balance Sheet

Sirius Group monitors counterparty credit ratings and macroeconomic conditions, and considers the most current A.M. Best and S&P credit ratings to determine the allowance each quarter. Of the total gross assets in scope as of March 31, 2020, approximately 63% were balances with counterparties rated by either A.M. Best or S&P. Of the total rated, 76% were rated A- or better.

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Income taxes

3 Months Ended

Mar. 31, 2020

Income Tax Disclosure [Abstract]

Income taxes

Income taxes

The Company and its Bermuda-domiciled subsidiaries are not subject to Bermuda income tax under current Bermuda law. In the event there is a change in the current law such that taxes are imposed, the Company and its Bermuda-domiciled subsidiaries would be exempt from such tax until March 31, 2035, pursuant to the Bermuda Exempted Undertakings Tax Protection Act of 1966. The Company has subsidiaries and branches that operate in various other jurisdictions around the world that are subject to tax in the jurisdictions in which they operate. The jurisdictions in which the Company's subsidiaries and branches are subject to tax are Australia, Belgium, Canada, Denmark, Germany, Gibraltar, Hong Kong (China), Ireland, Luxembourg, Malaysia, Shanghai (China), Singapore, Spain, Sweden, Switzerland, the United Kingdom, and the United States.

Sirius Group reported an income tax expense (benefit) of $(14.8) million and $17.2 million during the three months ended March 31, 2020 and 2019, respectively, on pre-tax income (loss) of $(136.1) million and $121.3 million, respectively. The effective tax rate for the three months ended March 31, 2020 was 10.9%, which was lower than the Swedish statutory rate of 21.4% (the rate at which the majority of Sirius Group's worldwide operations are taxed) primarily because of valuation allowance recorded against certain deferred tax assets and jurisdictions with pretax losses for which no tax benefit can be recognized. The effective tax rate for the three months ended March 31, 2019 was 14.2%, which was lower than the Swedish statutory rate of 21.4% (the rate at which the majority of Sirius Group's worldwide operations are taxed) primarily because of income recognized in jurisdictions with lower rates than Sweden. In arriving at the effective tax rate for the three months ended March 31, 2020 and 2019, Sirius Group forecasted all income and expense items including the change in unrealized investment gains (losses) and realized investment gains (losses) for the years ending December 31, 2020 and 2019.

The Tax Cuts and Jobs Act ("TCJA") includes a new Base Erosion and Anti-Abuse Minimum Tax ("BEAT") provision, which is essentially a minimum tax that is potentially applicable to certain otherwise deductible payments made by U.S. entities to non-U.S. affiliates, including cross-border interest payments and reinsurance premiums. The statutory BEAT rate is 10% in 2019-2025, and then rises to 12.5% in 2026 and thereafter. The TCJA also includes provisions for Global Intangible Low-Taxed Income ("GILTI") under which taxes on foreign income are imposed on the excess of a deemed return on tangible assets of certain foreign subsidiaries. Consistent with accounting guidance, Sirius Group will treat BEAT as an in period tax charge when incurred in future periods for which no deferred taxes need to be provided and has made an accounting policy election to treat GILTI taxes in a similar manner. No provision for income taxes related to BEAT or GILTI was recorded as of March 31, 2020 and December 31, 2019.

Sirius Group has capital and liquidity in many of its subsidiaries, some of which may reflect undistributed earnings. If such capital or liquidity were to be paid or distributed to the Company or Sirius Group's subsidiaries, as dividends or otherwise, they may be subject to income or withholding taxes. Sirius Group generally intends to operate, and manage its capital and liquidity, in a tax-efficient manner. However, the applicable tax laws in relevant countries are still evolving, including in response to guidance from the Organisation for Economic Cooperation and Development. Accordingly, such payments or earnings may be subject to income or withholding tax in jurisdictions where they are not currently taxed or at higher rates of tax than currently taxed, and the applicable tax authorities could attempt to apply income or withholding tax to past earnings or payments.

In April 2020, the European Court of Justice (the “ECJ”) published a decision disallowing the eligibility of an unrelated Gibraltar company for a European Union directive providing relief from withholding taxes on cross-border dividends. More generally, as a result of Brexit, it is projected that Gibraltar companies will cease to be eligible for European Union tax directives from January 1, 2021. The Company has a subsidiary organized in Gibraltar which has been a party to cross-border transactions with affiliates. Accordingly, the Company is currently evaluating the potential tax consequences of both the ECJ decision and Brexit to legacy and future transactions involving this Gibraltar subsidiary, and is assessing whether these developments could materially impact the Company’s provision for income taxes.

Deferred tax asset, net of valuation allowance

Sirius Group's net deferred tax liability, net of the valuation allowance as of March 31, 2020 is $12.5 million. Of the $12.5 million, $27.0 million relates to net deferred tax assets in U.S. subsidiaries, $133.0 million relates to net deferred tax assets in Luxembourg subsidiaries, $182.7 million relates to net deferred tax liabilities in Sweden subsidiaries, and $10.2 million relates to other net deferred tax asset.

Sirius Group records a valuation allowance against deferred tax assets if it becomes more likely than not that all or a portion of a deferred tax asset will not be realized. Changes in valuation allowances from period to period are included in income tax expense in the period of change. In determining whether or not a valuation allowance, or change therein, is warranted, Sirius Group considers factors such as prior earnings history, expected future earnings, carryback and carryforward periods and strategies that if executed would result in the realization of a deferred tax asset. It is possible that certain planning strategies or projected earnings in certain subsidiaries may not be feasible to utilize the entire deferred tax asset, which could result in material changes to Sirius Group's deferred tax assets and tax expense.

Uncertain tax positions

Recognition of the benefit of a given tax position is based upon whether a company determines that it is more likely than not that a tax position will be sustained upon examination based upon the technical merits of the position. In evaluating the more likely than not recognition threshold, Sirius Group must presume that the tax position will be subject to examination by a taxing authority with full knowledge of all relevant information. If the recognition threshold is met, then the tax position is measured at the largest amount of benefit that is more than 50% likely of being realized upon ultimate settlement.

As of March 31, 2020, the total reserve for unrecognized tax benefits is $42.8 million. If Sirius Group determines in the future that its reserves for unrecognized tax benefits on permanent differences and interest and penalties are not needed, the reversal of $42.6 million of such reserves as of March 31, 2020 would be recorded as an income tax benefit and would impact the effective tax rate. If Sirius Group determines in the future that its reserves for unrecognized tax benefits on temporary differences are not needed, the reversal of $0.2 million of such reserves as of March 31, 2020 would not impact the effective tax rate due to deferred tax accounting but would accelerate the payment of cash to the taxing authority. Most of Sirius Group's reserves for unrecognized tax benefits on permanent differences relate to interest deductions denied by the Swedish Tax Authority ("STA"), as described further below.

The STA has denied deductions claimed by two of the Company's Swedish subsidiaries in certain tax years for interest paid on intra-group debt instruments. Sirius Group has challenged the STA's denial in court based on the technical merits. In October 2018, one of the Swedish subsidiaries received an adverse decision from Sweden's Administrative Court, which Sirius Group has appealed. Sirius Group has taken into account this and other relevant developments in applicable Swedish tax law and has established a reserve for this uncertain tax position. As of March 31, 2020, the total amount of such reserve was $42.0 million.

In connection with this matter, Sirius Group has also taken into account the Stock Purchase Agreement ("SPA") by which Sirius Group was sold to CMIG International Holding Pte. Ltd ("CMIG International") in 2016 and has recorded an indemnification asset. Pursuant to the SPA, the seller agreed to indemnify the buyer and Sirius Group for, among other things, (1) any additional tax liability in excess of Sirius Group's accounting for uncertain tax positions for tax periods prior to the sale of Sirius Group to CMIG International, and (2) an impairment in Sirius Group's net deferred tax assets resulting from a final determination by a tax authority. While Sirius Group intends to continue challenging the STA's denial based on the technical merits (including appealing the adverse court decision received in October 2018), the ultimate resolution of these tax disputes is uncertain and no assurance can be given that there will be no material changes to Sirius Group's operating results or balance sheet in connection with these uncertain tax positions or the related indemnification.

With few exceptions, Sirius Group is no longer subject to U.S. federal, state or non-U.S. income tax examinations by tax authorities for years before 2015.

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Variable interest entities (Details) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019	Dec. 31, 2018
Assets:
Fixed maturity investments	$ 1,732.1	$ 1,681.0
Short-term investments	1,041.8	1,085.2
Cash	140.5	136.3
Insurance and reinsurance premiums receivable	964.2	730.1
Funds held by ceding companies	260.5	293.9
Deferred acquisition costs	168.2	148.2
Other assets	143.7	161.4
Total assets	6,757.6	6,413.8
Liabilities
Loss and loss adjustment expense reserves	2,519.6	2,331.5	$ 1,976.3	$ 2,016.7
Unearned insurance and reinsurance premiums	979.2	708.0
Other liabilities	200.4	201.3
Total liabilities	5,081.3	4,548.0
VIEs
Assets:
Fixed maturity investments	3.6	3.9
Short-term investments	0.5	0.5
Cash	0.1	0.1
Total investments	4.2	4.5
Insurance and reinsurance premiums receivable	(0.5)	(0.3)
Funds held by ceding companies	3.4	3.4
Deferred acquisition costs	0.1	0.3
Other assets	0.0	0.0
Total assets	7.2	7.9
Liabilities
Loss and loss adjustment expense reserves	0.4	0.5
Unearned insurance and reinsurance premiums	0.1	0.6
Other liabilities	0.1	0.1
Total liabilities	$ 0.6	$ 1.2

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Consolidated Statements of Shareholders' Equity - USD ($) $ in Millions	Total	Common shares	Additional paid-in surplus	Retained earnings	Accumulated other comprehensive (loss)	Parent	Noncontrolling Interest
Beginning balance at Dec. 31, 2018		$ 1.2	$ 1,089.1	$ 816.6	$ (202.4)
Changes in common shareholders' equity
Share-based compensation			1.2
Other, net			(0.1)
Net (loss) income	$ 104.1			104.1
Income attributable to non-controlling interests	(0.4)			(0.4)
Change in carrying value of Series B preference shares				(8.4)
Other, net				(0.1)
Change in foreign currency translation, net of tax	(27.8)				(27.8)
Ending balance at Mar. 31, 2019	1,775.2		1,090.2	911.8	(230.2)	$ 1,773.0	$ 2.2
Beginning balance at Dec. 31, 2019		$ 1.2	1,098.2	778.5	(237.5)
Changes in common shareholders' equity
Share-based compensation			1.9
Other, net			0.0
Net (loss) income	(121.3)			(121.3)
Income attributable to non-controlling interests	(0.2)			(0.2)
Change in carrying value of Series B preference shares				23.4
Other, net				0.1
Change in foreign currency translation, net of tax	(63.4)				(63.4)
Ending balance at Mar. 31, 2020	$ 1,476.7		$ 1,100.1	$ 673.7	$ (300.9)	$ 1,474.1	$ 2.6

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Consolidated Balance Sheets - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Assets
Fixed maturity investments, trading, at fair value (Amortized cost 2020: $1,705.0; 2019: $1,656.6)	$ 1,732.1	$ 1,681.0
Short-term investments, at fair value (Amortized cost 2020: $1,032.7; 2019: $1,090.8)	1,041.8	1,085.2
Equity securities, trading, at fair value (Cost 2020: $409.5; 2019: $379.2)	366.6	405.2
Other long-term investments, at fair value (Cost 2020: $323.2; 2019: $315.4)	355.5	346.8
Cash	140.5	136.3
Restricted cash	15.3	14.3
Total investments and cash	3,651.8	3,668.8
Accrued investment income	10.9	11.2
Insurance and reinsurance premiums receivable	964.2	730.1
Reinsurance recoverable on unpaid losses	444.2	410.3
Reinsurance recoverable on paid losses	85.7	73.9
Funds held by ceding companies	260.5	293.9
Ceded unearned insurance and reinsurance premiums	245.5	162.0
Deferred acquisition costs	168.2	148.2
Deferred tax asset	171.0	166.7
Accounts receivable on unsettled investment sales	35.2	6.7
Goodwill	400.8	400.8
Intangible assets	175.9	179.8
Other assets	143.7	161.4
Total assets	6,757.6	6,413.8
Liabilities
Loss and loss adjustment expense reserves	2,519.6	2,331.5
Unearned insurance and reinsurance premiums	979.2	708.0
Ceded reinsurance payable	332.8	244.7
Funds held under reinsurance treaties	148.0	169.1
Deferred tax liability	183.5	205.9
Debt	664.8	685.2
Accounts payable on unsettled investment purchases	53.0	2.3
Other liabilities	200.4	201.3
Total liabilities	5,081.3	4,548.0
Commitments and contingencies (see Note 19)
Mezzanine equity
Series B preference shares	199.6	223.0
Common shareholders' equity
Common shares (shares issued and outstanding, 2020 & 2019: 115,299,341)	1.2	1.2
Additional paid-in surplus	1,100.1	1,098.2
Retained earnings	673.7	778.5
Accumulated other comprehensive (loss)	(300.9)	(237.5)
Total common shareholders' equity	1,474.1	1,640.4
Non-controlling interests	2.6	2.4
Total equity	1,476.7	1,642.8
Total liabilities, mezzanine equity, and equity	$ 6,757.6	$ 6,413.8

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Commitments and contingencies - Future annual minimum rental payments (Details) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
2020	$ 6.5
2021	8.1
2022	7.2
2023	4.7
2024	2.3
2025 and after	1.1
Total future annual minimum rental payments as at March 31, 2020	29.9
Less: present value discount	(2.1)
Lease liability	$ 27.8	$ 29.3

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Common shareholder's equity, mezzanine equity, and non controlling interests - Non-controlling interests (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Change in non-controlling interest
Non-controlling interests, beginning of the period	$ 2.4	$ 1.7
Net income attributable to non-controlling interests	0.2	0.4
Other, net	0.0	0.1
Non-controlling interests, end of the period	2.6	$ 2.2
Alstead Re
Change in non-controlling interest
Non-controlling interests, beginning of the period	2.3
Non-controlling interests, end of the period	$ 2.5

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Share-based compensation - Unrecognized Compensation Cost and Period Of Recognition (Details) $ in Millions	3 Months Ended
	Mar. 31, 2020 USD ($)
RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost related to unvested awards	$ 9.8
Weighted average recognition period (years)	1 year 7 months 30 days
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost related to unvested awards	$ 1.8
Weighted average recognition period (years)	1 year 11 months 12 days
IPO Incentive Awards | Performance share units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost related to unvested awards	$ 2.6
Weighted average recognition period (years)	1 year 9 months
Long Term Incentive Plan 2019 | Performance share units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost related to unvested awards	$ 1.1
Weighted average recognition period (years)	1 year 9 months
2018 Long Term Incentive Plan (LTIP)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost related to unvested awards	$ 0.2
Weighted average recognition period (years)	9 months

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Transactions with related parties (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Transactions with related parties
Gross written premiums	$ 817.6	$ 622.3
Receivables due from affiliates	31.0		$ 16.1
Payables due to affiliates	0.9		$ 0.9
Insurance and MGU affiliates, or their subsidiaries
Transactions with related parties
Gross written premiums	$ 41.3	$ 24.1

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Label	Element	Value
Retained Earnings [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	$ (6,800,000)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Adjusted Balance	us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAdjustedBalance1	$ 771,700,000

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Investment securities - Equity securities and Other long-term investments (Details) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Equity securities
Equity securities and Other long-term investments
Cost or amortized cost	$ 409.5	$ 379.2
Gross unrealized gains	37.4	55.6
Gross unrealized losses	(98.4)	(37.3)
Net foreign currency gains	18.1	7.7
Fair value	366.6	405.2
Other long-term investments
Equity securities and Other long-term investments
Cost or amortized cost	323.2	315.4
Gross unrealized gains	50.3	49.9
Gross unrealized losses	(31.7)	(29.3)
Net foreign currency gains	13.7	10.8
Fair value	355.5	346.8
Other long-term investments | Hedge funds and private equity funds
Equity securities and Other long-term investments
Fair value	279.6	269.0
Other long-term investments | Limited liability companies and private equity securities
Equity securities and Other long-term investments
Fair value	75.9	77.8
Fixed income mutual funds
Equity securities and Other long-term investments
Fair value	192.1	175.3
Common shares
Equity securities and Other long-term investments
Fair value	184.4	228.1
Other equity securities
Equity securities and Other long-term investments
Fair value	$ (9.9)	$ 1.8

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Fair value measurements - Fair value measurements by level (Details) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Assets measured at fair value
Fixed maturity investments	$ 1,732.1	$ 1,681.0
Equity securities	366.6	405.2
Short-term investments	1,041.8	1,085.2
Other long-term investments	75.9	77.8
Total investments	3,216.4	3,249.2
Derivative instruments	11.7	11.4
Total assets measured at fair value	3,248.0	3,280.6
Liabilities measured at fair value
Contingent consideration liabilities	28.3	28.2
Derivative instruments	20.4	9.5
Total liabilities measured at fair value	48.7	37.7
U.S. Government and government agency
Assets measured at fair value
Fixed maturity investments	128.2	110.5
Corporate debt securities
Assets measured at fair value
Fixed maturity investments	444.3	474.1
Residential mortgage-backed securities
Assets measured at fair value
Fixed maturity investments	471.9	438.9
Asset-backed securities
Assets measured at fair value
Fixed maturity investments	524.4	486.8
Commercial mortgage-backed securities
Assets measured at fair value
Fixed maturity investments	94.3	89.0
Non-U.S. government and government agency
Assets measured at fair value
Fixed maturity investments	60.8	63.0
Preferred stocks
Assets measured at fair value
Fixed maturity investments	6.5	17.0
U.S. States, municipalities, and political subdivision
Assets measured at fair value
Fixed maturity investments	1.7	1.7
Fixed income mutual funds
Assets measured at fair value
Equity securities	192.1	175.3
Common shares
Assets measured at fair value
Equity securities	184.4	228.1
Other equity securities
Assets measured at fair value
Equity securities	(9.9)	1.8
Level 1 Inputs
Assets measured at fair value
Fixed maturity investments	156.8	140.8
Equity securities	364.9	403.4
Short-term investments	1,019.5	1,073.7
Other long-term investments	0.0	0.0
Total investments	1,541.2	1,617.9
Derivative instruments	1.0	1.3
Total assets measured at fair value	1,542.2	1,619.2
Liabilities measured at fair value
Contingent consideration liabilities	0.0	0.0
Derivative instruments	0.8	0.2
Total liabilities measured at fair value	0.8	0.2
Level 1 Inputs | U.S. Government and government agency
Assets measured at fair value
Fixed maturity investments	127.1	109.1
Level 1 Inputs | Corporate debt securities
Assets measured at fair value
Fixed maturity investments	0.0	0.0
Level 1 Inputs | Residential mortgage-backed securities
Assets measured at fair value
Fixed maturity investments	0.0	0.0
Level 1 Inputs | Asset-backed securities
Assets measured at fair value
Fixed maturity investments	0.0	0.0
Level 1 Inputs | Commercial mortgage-backed securities
Assets measured at fair value
Fixed maturity investments	0.0	0.0
Level 1 Inputs | Non-U.S. government and government agency
Assets measured at fair value
Fixed maturity investments	29.7	31.7
Level 1 Inputs | Preferred stocks
Assets measured at fair value
Fixed maturity investments	0.0	0.0
Level 1 Inputs | U.S. States, municipalities, and political subdivision
Assets measured at fair value
Fixed maturity investments	0.0	0.0
Level 1 Inputs | Fixed income mutual funds
Assets measured at fair value
Equity securities	192.1	175.3
Level 1 Inputs | Common shares
Assets measured at fair value
Equity securities	184.4	228.1
Level 1 Inputs | Other equity securities
Assets measured at fair value
Equity securities	(11.6)	0.0
Level 2 Inputs
Assets measured at fair value
Fixed maturity investments	1,572.7	1,523.2
Equity securities	1.7	1.8
Short-term investments	22.3	11.5
Other long-term investments	0.0	0.0
Total investments	1,596.7	1,536.5
Derivative instruments	0.0	0.0
Total assets measured at fair value	1,596.7	1,536.5
Liabilities measured at fair value
Contingent consideration liabilities	0.0	0.0
Derivative instruments	0.0	0.0
Total liabilities measured at fair value	0.0	0.0
Level 2 Inputs | U.S. Government and government agency
Assets measured at fair value
Fixed maturity investments	1.1	1.4
Level 2 Inputs | Corporate debt securities
Assets measured at fair value
Fixed maturity investments	444.3	474.1
Level 2 Inputs | Residential mortgage-backed securities
Assets measured at fair value
Fixed maturity investments	471.9	438.9
Level 2 Inputs | Asset-backed securities
Assets measured at fair value
Fixed maturity investments	524.4	486.8
Level 2 Inputs | Commercial mortgage-backed securities
Assets measured at fair value
Fixed maturity investments	94.3	89.0
Level 2 Inputs | Non-U.S. government and government agency
Assets measured at fair value
Fixed maturity investments	31.1	31.3
Level 2 Inputs | Preferred stocks
Assets measured at fair value
Fixed maturity investments	3.9	0.0
Level 2 Inputs | U.S. States, municipalities, and political subdivision
Assets measured at fair value
Fixed maturity investments	1.7	1.7
Level 2 Inputs | Fixed income mutual funds
Assets measured at fair value
Equity securities	0.0	0.0
Level 2 Inputs | Common shares
Assets measured at fair value
Equity securities	0.0	0.0
Level 2 Inputs | Other equity securities
Assets measured at fair value
Equity securities	1.7	1.8
Level 3 Inputs
Assets measured at fair value
Fixed maturity investments	2.6	17.0
Equity securities	0.0	0.0
Short-term investments	0.0	0.0
Other long-term investments	75.9	77.8
Total investments	78.5	94.8
Derivative instruments	10.7	10.1
Total assets measured at fair value	109.1	124.9
Liabilities measured at fair value
Contingent consideration liabilities	28.3	28.2
Derivative instruments	19.6	9.3
Total liabilities measured at fair value	47.9	37.5
Level 3 Inputs | U.S. Government and government agency
Assets measured at fair value
Fixed maturity investments	0.0	0.0
Level 3 Inputs | Corporate debt securities
Assets measured at fair value
Fixed maturity investments	0.0	0.0
Level 3 Inputs | Residential mortgage-backed securities
Assets measured at fair value
Fixed maturity investments	0.0	0.0
Level 3 Inputs | Asset-backed securities
Assets measured at fair value
Fixed maturity investments	0.0	0.0
Level 3 Inputs | Commercial mortgage-backed securities
Assets measured at fair value
Fixed maturity investments	0.0	0.0
Level 3 Inputs | Non-U.S. government and government agency
Assets measured at fair value
Fixed maturity investments	0.0	0.0
Level 3 Inputs | Preferred stocks
Assets measured at fair value
Fixed maturity investments	2.6	17.0
Level 3 Inputs | U.S. States, municipalities, and political subdivision
Assets measured at fair value
Fixed maturity investments	0.0	0.0
Level 3 Inputs | Fixed income mutual funds
Assets measured at fair value
Equity securities	0.0	0.0
Level 3 Inputs | Common shares
Assets measured at fair value
Equity securities	0.0	0.0
Level 3 Inputs | Other equity securities
Assets measured at fair value
Equity securities	0.0	0.0
Loan participation
Assets measured at fair value
Loan participation	19.9	20.0
Loan participation | Level 1 Inputs
Assets measured at fair value
Loan participation	0.0	0.0
Loan participation | Level 2 Inputs
Assets measured at fair value
Loan participation	0.0	0.0
Loan participation | Level 3 Inputs
Assets measured at fair value
Loan participation	$ 19.9	$ 20.0

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Reserves for unpaid losses and loss adjustment expenses (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Summary of the loss and LAE reserve activities
Gross beginning balance	$ 2,331.5	$ 2,016.7
Less beginning reinsurance recoverable on unpaid losses	(410.3)	(350.2)
Net loss and LAE reserve balance	1,921.2	1,666.5
Losses and LAE incurred relating to:
Current year losses	422.9	167.3
Prior years losses	4.2	16.6
Total net incurred losses and LAE	427.1	183.9
Foreign currency translation adjustment to net loss and LAE reserves	(21.8)	(3.4)
Loss and LAE paid relating to:
Current year losses	43.1	36.2
Prior years losses	208.0	183.8
Total loss and LAE payments	251.1	220.0
Net ending balance	2,075.4	1,627.0
Plus ending reinsurance recoverable on unpaid losses	444.2	349.3
Gross ending balance	$ 2,519.6	$ 1,976.3

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Summary of significant accounting policies - Recent adopted changes in accounting principle and Recent accounting pronouncements (Details) - Accounting Standards Update 2016-13 $ in Millions	Jan. 01, 2020 USD ($)
Summary of significant accounting policies
Allowance for credit loss upon adoption of new accounting guidance	$ (6.8)
Cumulative effect of an accounting change	$ 14.9

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Investment securities - Net investment income (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Net Investment Income
Total investment income	$ 16.4	$ 23.8
Investment expenses	(2.9)	(3.7)
Net investment income	13.5	20.1
Fixed maturity investments
Net Investment Income
Total investment income	10.3	16.8
Short-term investments
Net Investment Income
Total investment income	3.3	0.4
Equity securities
Net Investment Income
Total investment income	2.6	2.7
Other long-term investments
Net Investment Income
Total investment income	$ 0.2	$ 3.9

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Debt and standby letters of credit facilities - Standby Letter of Credit Facilities (Details) kr in Billions	Mar. 31, 2020 USD ($)	Mar. 31, 2020 SEK (kr)	Dec. 31, 2019 USD ($)	Dec. 31, 2019 SEK (kr)	Nov. 09, 2019 USD ($) letter_of_credit
Standby Letter of Credit Facilities
Number of standby letter of credit agreements renewed | letter_of_credit					2
Other Secured Letter of Credit and Trust Arrangement | Sirius America Insurance Company
Standby Letter of Credit Facilities
Secured letter of credit and trust arrangements were collateralized by pledged assets and assets in trust	$ 47,800,000		$ 57,700,000
Other Secured Letter of Credit and Trust Arrangement | Sirius Bermuda Insurance Company Ltd.
Standby Letter of Credit Facilities
Secured letter of credit and trust arrangements were collateralized by pledged assets and assets in trust	513,800,000		784,000,000
Sirius International | Nordea Bank Finland Abp
Standby Letter of Credit Facilities
Borrowing capacity					$ 90,000,000
Sirius International | DNB Bank ASA London Branch
Standby Letter of Credit Facilities
Borrowing capacity					35,000,000
Sirius International | Standby Letters of Credit
Standby Letter of Credit Facilities
Borrowing capacity					125,000,000
Sirius International | Unsecured Standby Letters of Credit | DNB Bank ASA London Branch
Standby Letter of Credit Facilities
Borrowing capacity					$ 25,000,000
Sirius International | Other Secured Letter of Credit and Trust Arrangement
Standby Letter of Credit Facilities
Secured letter of credit and trust arrangements were collateralized by pledged assets and assets in trust	$ 335,600,000	kr 3.4	$ 363,300,000	kr 3.4

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Income taxes - Deferred tax asset, net of valuation allowance and Uncertain tax positions (Details) $ in Millions	Mar. 31, 2020 USD ($)
Income taxes
Net deferred tax liability, net of valuation allowance	$ 12.5
Other net deferred tax liabilities	10.2
Uncertain tax positions
Total reserve for unrecognized tax benefits	42.8
Reversal of reserves for unrecognized tax benefits on permanent differences and interest and penalties	42.6
Reversal of reserves for unrecognized tax benefits on temporary differences	0.2
U.S. subsidiaries
Income taxes
Net deferred tax assets	27.0
Luxembourg subsidiaries
Income taxes
Net deferred tax assets	133.0
Sweden subsidiaries
Income taxes
Net deferred tax assets	182.7
Swedish Tax Authority | Sweden subsidiaries
Uncertain tax positions
Reserve attributable to uncertain tax positions	$ 42.0

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Segment information (Tables)

3 Months Ended

Mar. 31, 2020

Segment Reporting [Abstract]

Summary of segment results

The following tables summarize the segment results for the three months ended March 31, 2020 and 2019:

	For the three months ended March 31, 2020
(Expressed in millions of U.S. dollars)	Global Reinsurance			Global A&H			U.S. Specialty			Runoff & Other			Corporate Elimination			Total
Gross written premiums	$	465.3		$	262.1		$	20.8		$	69.4		$	—		$	817.6
Net written premiums	$	345.4		$	200.7		$	15.2		$	68.6		$	—		$	629.9
Net earned insurance and reinsurance premiums	$	235.0		$	117.9		$	12.8		$	69.0		$	—		$	434.7
Loss and allocated LAE(1)	(257.2		)	(80.3		)	(7.7		)	(68.9		)	—			(414.1		)
Insurance and reinsurance acquisition expenses	(50.9		)	(30.8		)	(3.0		)	(0.4		)	10.4			(74.7		)
Technical profit	(73.1		)	6.8			2.1			(0.3		)	10.4			(54.1		)
Unallocated LAE(2)	(5.0		)	(1.7		)	(0.1		)	(0.8		)	(5.4		)	(13.0		)
Other underwriting expenses	(21.3		)	(5.6		)	(5.2		)	(0.9		)	(5.0		)	(38.0		)
Underwriting income	(99.4		)	(0.5		)	(3.2		)	(2.0		)	—			(105.1		)
Service fee revenue(3)	—			35.9			—			—			(11.0		)	24.9
Managing general underwriter unallocated LAE	—			(6.0		)	—			—			6.0			—
Managing general underwriter other underwriting expenses	—			(5.0		)	—			—			5.0			—
General and administrative expenses, MGU + Runoff & Other(4)	—			(14.2		)	—			(1.5		)	—			(15.7		)
Underwriting (loss) income, including net service fee income	(99.4		)	10.2			(3.2		)	(3.5		)	—			(95.9		)
Net investment income																13.5
Net realized investment gains																20.3
Net unrealized investment (losses) gains																(43.8		)
Net foreign exchange gains																18.5
Other revenue(5)																(20.6		)
General and administrative expenses(6)																(16.4		)
Intangible asset amortization expenses																(3.9		)
Interest expense on debt																(7.8		)
Pre-tax (loss) income																$	(136.1	)
Underwriting Ratios
Loss ratio	111.6		%	69.6		%	60.9		%	NM			NM			98.3		%
Acquisition expense ratio	21.7		%	26.1		%	23.4		%	NM			NM			17.2		%
Other underwriting expense ratio	9.1		%	4.7		%	40.6		%	NM			NM			8.7		%
Combined ratio(7)	142.4		%	100.4		%	124.9		%	NM			NM			124.2		%
Goodwill and intangible assets(8)	$	—		$	568.6		$	—		$	8.1		$	—		$	576.7

⁽¹⁾Loss and allocated loss adjustment expenses ("LAE") are part of Loss and loss adjustment expenses on the Consolidated Statements of Income (the sum of Loss and allocated LAE and Unallocated LAE is equal to Loss and loss adjustment expenses on the Consolidated Statements of Income).

⁽²⁾Unallocated LAE are part of Loss and loss adjustment expenses on the Consolidated Statements of Income (the sum of Loss and allocated LAE and Unallocated LAE is equal to Loss and loss adjustment expenses on the Consolidated Statements of Income).

⁽³⁾Service fee revenue is part of Other revenue on the Consolidated Statements of Income (the sum of Service fee revenue and Other revenue is equal to Other revenue on the Consolidated Statements of Income).

⁽⁴⁾General and administrative expenses, MGU + Runoff & Other is part of General and administrative expenses on the Consolidated Statements of Income (the sum of General and administrative expenses, MGU + Runoff & Other and General and administrative expenses is equal to General and administrative expenses on the Consolidated Statements of Income).

⁽⁵⁾Other revenue is presented net of Service fee revenue and is comprised mainly of losses from derivatives (seeNote 12) (the sum of Service fee revenue and Other revenue is equal to Other revenue on the Consolidated Statements of Income).

⁽⁶⁾General and administrative expenses are presented net of General and administrative expenses, MGU + Runoff & Other (the sum of General and administrative expenses, MGU + Runoff & Other and General and administrative expenses is equal to General and administrative expenses on the Consolidated Statements of Income).

⁽⁷⁾Ratios considered not meaningful ("NM") to Runoff & Other and Corporate Elimination.

⁽⁸⁾Sirius Group does not allocate its assets by segment, with the exception of goodwill and intangible assets.

	For the three months ended March 31, 2019
(Expressed in millions of U.S. dollars)	Global Reinsurance			Global A&H			U.S. Specialty			Runoff & Other			Corporate Elimination			Total
Gross written premiums	$	435.0		$	169.3		$	16.6		$	1.4		$	—		$	622.3
Net written premiums	$	335.9		$	134.9		$	13.6		$	0.4		$	—		$	484.8
Net earned insurance and reinsurance premiums	$	211.3		$	96.1		$	4.1		$	0.4		$	—		$	311.9
Loss and allocated LAE(1)	(107.8		)	(63.2		)	(2.4		)	(1.1		)	—			(174.5		)
Insurance and reinsurance acquisition expenses	(45.6		)	(26.6		)	(0.7		)	(0.7		)	10.3			(63.3		)
Technical profit	57.9			6.3			1.0			(1.4		)	10.3			74.1
Unallocated LAE(2)	(4.0		)	(1.5		)	—			(0.5		)	(3.4		)	(9.4		)
Other underwriting expenses	(21.6		)	(6.1		)	(2.8		)	(2.1		)	(2.7		)	(35.3		)
Underwriting income	32.3			(1.3		)	(1.8		)	(4.0		)	4.2			29.4
Service fee revenue(3)	—			36.3			—			—			(11.0		)	25.3
Managing general underwriter unallocated LAE	—			(4.1		)	—			—			4.1			—
Managing general underwriter other underwriting expenses	—			(2.7		)	—			—			2.7			—
General and administrative expenses, MGU + Runoff & Other(4)	—			(16.2		)	—			(0.8		)	—			(17.0		)
Underwriting (loss) income, including net service fee income	32.3			12.0			(1.8		)	(4.8		)	—			37.7
Net investment income																20.1
Net realized investment gains																9.0
Net unrealized investment (losses) gains																74.0
Net foreign exchange gains																5.1
Other revenue(5)																(5.7		)
General and administrative expenses(6)																(7.4		)
Intangible asset amortization expenses																(3.9		)
Interest expense on debt																(7.6		)
Pre-tax (loss) income																$	121.3
Underwriting Ratios
Loss ratio	52.9		%	67.3		%	58.5		%	NM			NM			59.0		%
Acquisition expense ratio	21.6		%	27.7		%	17.1		%	NM			NM			20.3		%
Other underwriting expense ratio	10.2		%	6.3		%	68.3		%	NM			NM			11.3		%
Combined ratio(7)	84.7		%	101.3		%	143.9		%	NM			NM			90.6		%
Goodwill and intangible assets(8)	$	—		$	584.2		$	—		$	8.1		$	—		$	592.3

⁽¹⁾Loss and allocated LAE are part of Loss and loss adjustment expenses on the Consolidated Statements of Income (the sum of Loss and allocated LAE and Unallocated LAE is equal to Loss and loss adjustment expenses on the Consolidated Statements of Income).

⁽²⁾Unallocated LAE are part of Loss and loss adjustment expenses on the Consolidated Statements of Income (the sum of Loss and allocated LAE and Unallocated LAE is equal to Loss and loss adjustment expenses on the Consolidated Statements of Income).

⁽³⁾Service fee revenue is part of Other revenue on the Consolidated Statements of Income (the sum of Service fee revenue and Other revenue is equal to Other revenue on the Consolidated Statements of Income).

⁽⁴⁾General and administrative expenses, MGU + Runoff & Other is part of General and administrative expenses on the Consolidated Statements of Income (the sum of General and administrative expenses, MGU + Runoff & Other and General and administrative expenses is equal to General and administrative expenses on the Consolidated Statements of Income).

⁽⁵⁾Other revenue is presented net of Service fee revenue and is comprised mainly of losses from derivatives (seeNote 12) (the sum of Service fee revenue and Other revenue is equal to Other revenue on the Consolidated Statements of Income).

⁽⁶⁾General and administrative expenses are presented net of General and administrative expenses, MGU + Runoff & Other (the sum of General and administrative expenses, MGU + Runoff & Other and General and administrative expenses is equal to General and administrative expenses on the Consolidated Statements of Income).

⁽⁷⁾Ratios considered not meaningful ("NM") to Runoff & Other and Corporate Elimination.

⁽⁸⁾Sirius Group does not allocate its assets by segment, with the exception of goodwill and intangible assets.

Summary information regarding net premiums written by client location and underwriting location by reportable segment

The following tables provide summary information regarding net premiums written by client location and underwriting location by reportable segment for the three months ended March 31, 2020 and 2019:

	For the three months ended March 31, 2020
(Expressed in millions of U.S. dollars)	Global Reinsurance		Global A&H		U.S. Specialty		Runoff & Other		Total
Net written premiums by client location:
United States	$	104.3	$	180.7	$	15.2	$	68.1	$	368.3
Europe	172.8		7.2		—		0.3		180.3
Canada, the Caribbean, Bermuda and Latin America	29.4		6.5		—		—		35.9
Asia and Other	38.9		6.3		—		0.2		45.4
Total net written premium by client location for the three months ended March 31, 2020	$	345.4	$	200.7	$	15.2	$	68.6	$	629.9
Net written premiums by underwriting location:
United States	$	72.6	$	131.2	$	15.2	$	68.0	$	287.0
Europe	208.2		69.5		—		0.4		278.1
Canada, the Caribbean, Bermuda and Latin America	48.1		—		—		—		48.1
Asia and Other	16.5		—		—		0.2		16.7
Total written premiums by underwriting location for the three months ended March 31, 2020	$	345.4	$	200.7	$	15.2	$	68.6	$	629.9

	For the three months ended March 31, 2019
(Expressed in millions of U.S. dollars)	Global Reinsurance		Global A&H		U.S. Specialty		Runoff & Other		Total
Net written premiums by client location:
United States	$	116.6	$	111.1	$	13.6	$	0.2	$	241.5
Europe	149.5		8.0		—		0.1		157.6
Canada, the Caribbean, Bermuda and Latin America	29.0		5.0		—		—		34.0
Asia and Other	40.8		10.8		—		0.1		51.7
Total net written premium by client location for the three months ended March 31, 2019	$	335.9	$	134.9	$	13.6	$	0.4	$	484.8
Net written premiums by underwriting location:
United States	$	75.7	$	71.0	$	13.6	$	0.2	$	160.5
Europe	207.0		63.6		—		0.1		270.7
Canada, the Caribbean, Bermuda and Latin America	35.9		—		—		—		35.9
Asia and Other	17.3		0.3		—		0.1		17.7
Total written premiums by underwriting location for the three months ended March 31, 2019	$	335.9	$	134.9	$	13.6	$	0.4	$	484.8

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Share-based compensation

3 Months Ended

Mar. 31, 2020

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Share-based compensation

Share-based compensation

Sirius Group's compensation plans include grants for various types of share-based and non-share-based compensation awards to key employees and directors of Sirius Group. As of March 31, 2020, Sirius Group's share-based compensation awards consist of performance shares units ("PSUs"), restricted share units ("RSUs"), restricted stock and options.

Sirius Group recognized $1.2 million and $0.2 million of compensation expense under the share-based awards during the three months ended March 31, 2020 and 2019, respectively. Sirius Group paid $0.3 million and $3.3 million to employees for share-based awards during the three months ended March 31, 2020 and 2019, respectively.

The following tables present unrecognized compensation cost associated with unvested awards and weighted average period over which it is expected to be recognized:

(Millions)	March 31, 2020
	PSUs - IPO Incentive Awards		PSUs - 2019 Long Term Incentive (LTI)		RSUs		Stock Options		2018 Long Term Incentive Plan (LTIP)
Unrecognized compensation cost related to unvested awards	$	2.6	$	1.1	$	9.8	$	1.8	$	0.2
Weighted average recognition period (years)	1.8 years		1.8 years		1.7 years		1.9 years		0.8 years

As of March 31, 2019, there were $34.3 million of unrecognized share-based compensation costs, which are expected to be recognized over two to three years.

The following table summarizes outstanding share-settled awards as of March 31, 2020:

As of and for the quarter ended March 31, 2020	Number of Shares
	PSUs - IPO Incentive Awards	PSUs - 2019 LTI	RSUs	Stock Options	2018 Long Term Incentive Plan (LTIP)
Unvested, beginning of period	555,163	391,136	1,353,852	1,374,945	870,471
Granted	—	—	—	—	—
Vested	—	—	—	—	—
Forfeited	11,967	8,809	33,015	—	14,372
Unvested, end of period	543,196	382,327	1,320,837	1,374,945	856,099

For the three months ended March 31, 2019, Sirius Group granted employees 401,311 PSUs, 1,411,714 RSUs, and 1,374,945 stock options.

Cash-Settled Awards

From time to time, the Company may issue cash-settled awards to its employees. In February 2020, Sirius Group awarded long-term incentive compensation to certain employees of the Company in the form of three-year, cliff-vested, phantom performance shares and phantom restricted shares that are payable in cash. Phantom performance shares compound through the end of the three-year award period based on the performance metrics during the period. The performance goals were determined by the Compensation Committee of the Board of Directors upon granting of awards. During the three months ended March 31, 2020, the Company recognized an expense of $1.6 million related to this award.

In addition, Sirius Group issued retention awards to certain key employees of the Company that vest and are paid in equal proportions on or prior to March 15, 2020 and on or prior to March 15, 2021, subject to continued employment on the applicable vesting date. In total the retention awards issued under this retention program were $13.8 million, of which, $6.9 million was paid on March 15, 2020. During the three months ended March 31, 2020, the Company recognized an expense of $6.3 million in General and administrative expenses.

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Variable interest entities

3 Months Ended

Mar. 31, 2020

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Variable interest entities

Variable interest entities

Sirius Group consolidates the results of operations and financial position of every voting interest entity ("VOE") in which it has a controlling financial interest and VIEs in which it is considered to be the primary beneficiary. The consolidation assessment, including the determination as to whether an entity qualifies as a VOE or VIE, depends on the facts and circumstances surrounding each entity.

Sirius Group has determined that Alstead Re is a VIE for which Sirius Group is the primary beneficiary and is required to consolidate it. The following table presents Alstead Re's assets and liabilities, as classified in the Consolidated Balance Sheets as of March 31, 2020 and December 31, 2019:

(Millions)	March 31, 2020			December 31, 2019
Assets:
Fixed maturity investments	$	3.6		$	3.9
Short-term investments	0.5			0.5
Cash	0.1			0.1
Total investments	4.2			4.5
Insurance and reinsurance premiums receivable	(0.5		)	(0.3		)
Funds held by ceding companies	3.4			3.4
Deferred acquisition costs	0.1			0.3
Other assets	—			—
Total assets	$	7.2		$	7.9
Liabilities
Loss and loss adjustment expense reserves	$	0.4		$	0.5
Unearned insurance and reinsurance premiums	0.1			0.6
Other liabilities	0.1			0.1
Total liabilities	$	0.6		$	1.2

Sirius Group is a passive investor in certain third-party-managed hedge and private equity funds, some of which are VIEs. Sirius Group is not involved in the design or establishment of these VIEs, nor does it actively participate in the management of the VIEs. The exposure to loss from these investments is limited to the carrying value of the investments at the balance sheet date.

Sirius Group calculates maximum exposure to loss to be (i) the amount invested in the debt or equity of the VIE, (ii) the notional amount of VIE assets or liabilities where Sirius Group has also provided credit protection to the VIE with the VIE as the referenced obligation, and (iii) other commitments and guarantees to the VIE. Sirius Group does not have any VIEs that it sponsors nor any VIEs where it has recourse to it or has provided a guarantee to the VIE interest holders.

The following table presents total assets of unconsolidated VIEs in which Sirius Group holds a variable interest, as well as the maximum exposure to loss associated with these VIEs:

			Maximum Exposure to Loss
(Millions)	Total VIE Assets		On-Balance Sheet		Off-Balance Sheet		Total
March 31, 2020
Other long-term investments(1)	$	250.7	$	103.0	$	8.8	$	111.8
Total at March 31, 2020	$	250.7	$	103.0	$	8.8	$	111.8
December 31, 2019
Other long-term investments(1)	$	257.8	$	102.6	$	16.3	$	118.9
Total at December 31, 2019	$	257.8	$	102.6	$	16.3	$	118.9

⁽¹⁾Comprised primarily of hedge funds and private equity funds.

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Reserves for unpaid losses and loss adjustment expenses

3 Months Ended

Mar. 31, 2020

Insurance [Abstract]

Reserves for unpaid losses and loss adjustment expenses

Reserves for unpaid losses and loss adjustment expenses

The following table summarizes the loss and LAE reserve activities of Sirius Group for the three months ended March 31, 2020 and 2019:

	Three months ended March 31,
(Millions)	2020			2019
Gross beginning balance	$	2,331.5		$	2,016.7
Less beginning reinsurance recoverable on unpaid losses	(410.3		)	(350.2		)
Net loss and LAE reserve balance	1,921.2			1,666.5
Losses and LAE incurred relating to:
Current year losses	422.9			167.3
Prior years losses	4.2			16.6
Total net incurred losses and LAE	427.1			183.9
Foreign currency translation adjustment to net loss and LAE reserves	(21.8		)	(3.4		)
Loss and LAE paid relating to:
Current year losses	43.1			36.2
Prior years losses	208.0			183.8
Total loss and LAE payments	251.1			220.0
Net ending balance	2,075.4			1,627.0
Plus ending reinsurance recoverable on unpaid losses	444.2			349.3
Gross ending balance	$	2,519.6		$	1,976.3

Loss and LAE development - Three Months Ended March 31, 2020

For the three months ended March 31, 2020, Sirius Group had net unfavorable loss reserve development of $4.2 million. Increases in loss reserve estimates were primarily recorded in Global Reinsurance ($9.1 million) primarily from a loss on a Lion Air crash in the Aviation & Space line of business. These increases were partially offset by favorable loss reserve development in Global A&H ($4.2 million).

Loss and LAE development - Three Months Ended March 31, 2019

For the three months ended March 31, 2019, Sirius Group had net unfavorable loss reserve development of $16.6 million. The most significant increases in loss reserve estimates were recorded in Global Reinsurance ($10.3 million) and Global A&H ($5.1 million). The unfavorable loss reserve development in Global Reinsurance was primarily attributable to higher than expected reporting from prior year catastrophe events ($15.6 million) mainly Hurricanes Irma, Michael, and Florence. In addition, there was unfavorable loss reserve development in Runoff & Other ($1.2 million).

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Fair value measurements

3 Months Ended

Mar. 31, 2020

Fair Value Disclosures [Abstract]

Fair value measurements

Fair value measurements

Fair value measurements are categorized into a hierarchy that distinguishes between inputs based on market data from independent sources ("observable inputs") and a reporting entity's internal assumptions based upon the best information available when external market data is limited or unavailable ("unobservable inputs"). Quoted prices in active markets for identical assets or liabilities have the highest priority ("Level 1"), followed by observable inputs other than quoted prices, including prices for similar but not identical assets or liabilities ("Level 2"), and unobservable inputs, including the reporting entity's estimates of the assumptions that market participants would use, having the lowest priority ("Level 3").

The availability of observable inputs can vary from financial instrument to financial instrument and is affected by a wide variety factors including, for example, the type of financial instrument, whether the financial instrument is new and not yet established in the marketplace, and other characteristics particular to the instrument. To the extent that valuation is based on models or inputs that are less observable or unobservable in the market, the determination of fair value requires significantly more judgment.

Accordingly, the degree of judgment exercised by management in determining fair value is greatest for instruments categorized in Level 3. In periods of market dislocation, the observability of prices and inputs may be reduced for many instruments. This may lead the Company to change the selection of the valuation technique (for example, from market to cash flow approach) or to use multiple valuation techniques to estimate the fair value of a financial instrument. These circumstances could cause an instrument to be reclassified between levels within the fair value hierarchy. Investments valued using Level 1 inputs include fixed maturity investments, primarily investments in U.S. Treasuries Bills and Notes, equity securities, and short-term investments. Investments valued using Level 2 inputs are primarily comprised of fixed maturity investments, which have been disaggregated into classes, including U.S. government and government agency, corporate debt securities, mortgage-backed and asset-backed securities, non-U.S. government and government agency, U.S. state and municipalities and political subdivision and preferred stocks. Investments valued using Level 2 inputs also include certain exchange-traded funds that track U.S. stock indices such as the S&P 500 but are traded on foreign exchanges. Fair value estimates for investments that trade infrequently and have few or no observable market prices are classified as Level 3 measurements. Sirius Group determines when transfers between levels have occurred as of the beginning of the period.

Valuation techniques

Sirius Group uses outside pricing services to assist in determining fair values for its investments. For investments in active markets, Sirius Group uses the quoted market prices provided by outside pricing services to determine fair value. The outside pricing services Sirius Group uses have indicated that they will only provide prices where observable inputs are available. In circumstances where quoted market prices are unavailable or are not considered reasonable, Sirius Group estimates the fair value using industry standard pricing models and observable inputs such as benchmark yields, reported trades, broker-dealer quotes, issuer spreads, benchmark securities, bids, offers, prepayment speeds, reference data including research publications, and other relevant inputs. Given that many fixed maturity investments do not trade on a daily basis, the outside pricing services evaluate a wide range of fixed maturity investments by regularly drawing parallels from recent trades and quotes of comparable securities with similar features. The characteristics used to identify comparable fixed maturity investments vary by asset type and take into account market convention.

The valuation process above is generally applicable to all of Sirius Group's fixed maturity investments. The techniques and inputs specific to asset classes within Sirius Group's fixed maturity investments for Level 2 securities that use observable inputs are as follows:

U.S. government and government agency

U.S. government and government agency securities consist primarily of debt securities issued by the U.S. Treasury and mortgage pass-through agencies such as the Federal National Mortgage Association, the Federal Home Loan Mortgage Corporation and the Government National Mortgage Association. Fixed maturity investments included in U.S. government and government agency securities are primarily priced by pricing services. When evaluating these securities, the pricing services gather information from market sources and integrate other observations from markets and sector news. Evaluations are updated by obtaining broker-dealer quotes and other market information including actual trade volumes, when available. The fair value of each security is individually computed using analytical models that incorporate option-adjusted spreads and other daily interest rate data.

Non-U.S. government and government agency

Non-U.S. government and government agency securities consist of debt securities issued by non-U.S. governments and their agencies along with supranational organizations (also known as sovereign debt securities). Securities held in these sectors are primarily priced by pricing services that employ proprietary discounted cash flow models to value the securities. Key quantitative inputs for these models are daily observed benchmark curves for treasury, swap, and high issuance credits. The pricing services then apply a credit spread for each security, which is developed by in-depth and real-time market analysis. For securities in which trade volume is low, the pricing services utilize data from more frequently traded securities with similar attributes. These models may also be supplemented by daily market and credit research for international markets.

Corporate debt securities

Corporate debt securities consist primarily of investment-grade debt of a wide variety of U.S. and non-U.S. corporate issuers and industries. The corporate fixed maturity investments are primarily priced by pricing services. When evaluating these securities, the pricing services gather information from market sources regarding the issuer of the security and obtain credit data, as well as other observations, from markets and sector news. Evaluations are updated by obtaining broker-dealer quotes and other market information including actual trade volumes, when available. The pricing services also consider the specific terms and conditions of the securities, including any specific features that may influence risk.

Mortgage-backed and asset-backed securities

The fair value of mortgage and asset-backed securities is primarily priced by pricing services using a pricing model that utilizes information from market sources and leveraging similar securities. Key inputs include benchmark yields, reported trades, underlying tranche cash flow data and collateral performance, plus new issue data, as well as broker-dealer quotes, issuer spreads, two-sided markets, benchmark securities, bids, offers, and reference data including issuer, vintage, loan type, collateral attributes, prepayment speeds, default rates, recovery rates, cash flow stress testing, credit quality ratings, and market research publications.

U.S. states, municipalities and political subdivisions

The U.S. states, municipalities and political subdivisions portfolio contains debt securities issued by U.S. domiciled state and municipal entities. These securities are generally priced by independent pricing services using the techniques described for U.S. government and government agency securities described above.

Preferred stocks

The fair value of preferred stocks is generally priced by independent pricing services using an evaluated pricing model that calculates the appropriate spread over a comparable security for each issue. Key inputs include exchange prices (underlying and common stock of the same issuer), benchmark yields, reported trades, broker-dealer quotes, issuer spreads, two-sided markets, benchmark securities, bids, offers, and reference data including sector, coupon, credit quality ratings, duration, credit enhancements, early redemption features, and market research publications.

Level 3 Investments

Level 3 valuations are generated from techniques that use assumptions not observable in the market. These unobservable assumptions reflect Sirius Group's assumptions about what market participants would use in valuing the investment. Generally, certain securities may start out as Level 3 when they are originally issued but, as observable inputs become available in the market, they may be reclassified to Level 2.

Sirius Group employs a number of procedures to assess the reasonableness of the fair value measurements for its other long-term investments, including obtaining and reviewing the audited annual financial statements of hedge funds and private equity funds and periodically discussing each fund's pricing with the fund manager. However, since the fund managers do not provide sufficient information to evaluate the pricing inputs and methods for each underlying investment, the inputs are considered to be unobservable.

The fair values of Sirius Group's investments in private equity securities and private debt instruments have been classified as Level 3 measurements. They are carried at fair value and are initially valued based on transaction price. Their valuation is subsequently estimated based on available evidence such as a market transaction in similar instruments and other financial information for the issuer.

Investments measured using Net Asset Value

The fair value of Sirius Group's investments in hedge funds and private equity funds has been determined using net asset value ("NAV"). The hedge fund's administrator provides quarterly updates of fair value in the form of Sirius Group's proportional interest in the underlying fund's NAV, which is deemed to approximate fair value, generally with a three month delay in valuation. The fair value of investment in hedge funds is measured using the NAV practical expedient and therefore has been not categorized within the fair value hierarchy. The private equity funds provide quarterly or semi-annual partnership capital statements with a three or six month delay which are used as a basis for valuation. These private equity investments vary in investment strategies and are not actively traded in any open markets. Due to a lag in reporting, some of the fund managers, fund administrators, or both, are unable to provide final fund valuations as of the Company's reporting date. In these circumstances, Sirius Group estimates the return of the current period and uses all credible information available. This includes utilizing preliminary estimates reported by its fund managers and using other information that is available to Sirius Group with respect to the underlying investments, as necessary.

Fair Value Measurements by Level

The following tables summarize Sirius Group's financial assets and liabilities measured at fair value as of March 31, 2020 and December 31, 2019 by level:

	March 31, 2020
(Millions)	Fair Value			Level 1 Inputs			Level 2 Inputs		Level 3 Inputs
Assets measured at fair value
Fixed maturity investments:
U.S. Government and government agency	$	128.2		$	127.1		$	1.1	$	—
Corporate debt securities	444.3			—			444.3		—
Residential mortgage-backed securities	471.9			—			471.9		—
Asset-backed securities	524.4			—			524.4		—
Commercial mortgage-backed securities	94.3			—			94.3		—
Non-U.S. government and government agency	60.8			29.7			31.1		—
Preferred stocks	6.5			—			3.9		2.6
U.S. States, municipalities, and political subdivision	1.7			—			1.7		—
Total fixed maturity investments	1,732.1			156.8			1,572.7		2.6
Equity securities:
Fixed income mutual funds	192.1			192.1			—		—
Common stocks	184.4			184.4			—		—
Other equity securities(1)	(9.9		)	(11.6		)	1.7		—
Total equity securities	366.6			364.9			1.7		—
Short-term investments	1,041.8			1,019.5			22.3		—
Other long-term investments(2)	75.9			—			—		75.9
Total investments	$	3,216.4		$	1,541.2		$	1,596.7	$	78.5
Loan participation	19.9			—			—		19.9
Derivative instruments	11.7			1.0			—		10.7
Total assets measured at fair value	$	3,248.0		$	1,542.2		$	1,596.7	$	109.1
Liabilities measured at fair value
Contingent consideration liabilities	$	28.3		$	—		$	—	$	28.3
Derivative instruments	20.4			0.8			—		19.6
Total liabilities measured at fair value	$	48.7		$	0.8		$	—	$	47.9

⁽¹⁾Sirius Group engaged in short selling of certain equity securities for which settlement was pending as of March 31, 2020.

⁽²⁾Excludes fair value of $279.6 associated with hedge funds and private equity funds which fair value is measured using NAV practical expedient.

	December 31, 2019
(Millions)	Fair value		Level 1 inputs		Level 2 inputs		Level 3 inputs
Assets measured at fair value
Fixed maturity investments:
U.S. Government and government agency	$	110.5	$	109.1	$	1.4	$	—
Corporate debt securities	474.1		—		474.1		—
Asset-backed securities	486.8		—		486.8		—
Residential mortgage-backed securities	438.9		—		438.9		—
Commercial mortgage-backed securities	89.0		—		89.0		—
Non-U.S. government and government agency	63.0		31.7		31.3		—
Preferred stocks	17.0		—		—		17.0
U.S. States, municipalities, and political subdivision	1.7		—		1.7		—
Total fixed maturity investments	1,681.0		140.8		1,523.2		17.0
Equity securities:
Fixed income mutual funds	175.3		175.3		—		—
Common stocks	228.1		228.1		—		—
Other equity securities	1.8		—		1.8		—
Total equity securities	405.2		403.4		1.8		—
Short-term investments	1,085.2		1,073.7		11.5		—
Other long-term investments(1)	77.8		—		—		77.8
Total investments	$	3,249.2	$	1,617.9	$	1,536.5	$	94.8
Loan participation	20.0		—		—		20.0
Derivative instruments	11.4		1.3		—		10.1
Total assets measured at fair value	$	3,280.6	$	1,619.2	$	1,536.5	$	124.9
Liabilities measured at fair value
Contingent consideration liabilities	$	28.2	$	—	$	—	$	28.2
Derivative instruments	9.5		0.2		—		9.3
Total liabilities measured at fair value	$	37.7	$	0.2	$	—	$	37.5

⁽¹⁾Excludes fair value of $269.0 associated with hedge funds and private equity funds which fair value is measured using NAV practical expedient.

Rollforward of Level 3 fair value measurements

The following tables present changes in Level 3 for financial instruments measured at fair value for the three months ended March 31, 2020 and March 31, 2019:

	For the three months ended March 31, 2020
(Millions)	Fixed Maturities			Other long-term investments(1)			Loan Participation			Derivative instruments assets & (liabilities)			Contingent consideration (liabilities)
Balance as of January 1, 2020	$	17.0		$	77.8		$	20.0		$	0.8		$	(28.2	)
Total realized and unrealized gains (losses)	2.6			(0.9		)	—			(13.3		)	(0.1		)
Foreign currency gains (losses) through Other Comprehensive Income	—			(1.0		)	—			—			—
Purchases	—			—			—			—			—
Sales/Settlements	(17.0		)	—			(0.1		)	3.6			—
Balance as of March 31, 2020	$	2.6		$	75.9		$	19.9		$	(8.9	)	$	(28.3	)

⁽¹⁾Excludes fair value of $279.6 associated with hedge funds and private equity funds which fair value is measured using NAV practical expedient.

	For the three months ended March 31, 2019
(Millions)	Fixed Maturities			Other long-term investments(1)			Loan Participation		Derivative instruments assets & (liabilities)			Contingent consideration (liabilities)
Balance as of January 1, 2019	$	5.4		$	63.6		$	—	$	(0.5	)	$	(28.8	)
Total realized and unrealized gains (losses)	—			9.3			—		(5.1		)	—
Foreign currency gains (losses) through Other Comprehensive Income	—			(0.7		)	—		—			—
Purchases	—			15.8			—		—			—
Sales/Settlements	(5.4		)	—			—		0.8			—
Balance as of March 31, 2019	$	—		$	88.0		$	—	$	(4.8	)	$	(28.8	)

⁽¹⁾Excludes fair value of $301.7 associated with hedge funds and private equity funds which fair value is measured using NAV practical expedient.

Fair value measurements – transfers between levels

There were no transfers between Level 3 and Level 2 measurements during the three months ended March 31, 2020 and 2019.

Significant Unobservable Inputs

The table below presents information about the significant unobservable inputs used for recurring fair value measurements for certain Level 3 instruments as of March 31, 2020 and December 31, 2019, and includes only those instruments for which information about the inputs is reasonably available to Sirius Group, such as data from independent third-party valuation service providers and from internal valuation models.

(Millions, except share prices)	March 31, 2020
Description	Valuation Technique(s)	Fair value			Unobservable input
Private equity securities(1)	Share price of recent transaction	$	32.5		Purchase share price	40.6
Loan participation(1)	Purchase price of recent transaction	$	19.9		Comparable yields	Range - 4.46% - 7.25% Median - 5.75%
Preferred stock(1)	Share price of recent transaction	$	17.5		Purchase price	7.74
Private equity securities(1)	Multiple of GAAP book value	$	13.3		Book value multiple	Range - 0.73x-0.91x Median - 0.82x
Private debt instrument(1)	Discounted cash flow	$	6.2		Discount yield	Range - 11.87% - 12.32% Median - 12.08%
Private equity securities(1)	Purchase price of recent transaction	$	5.1		Purchase price	7.74
Currency swaps(2)	Third party appraisal	$	2.4		Broker quote	$	2.4
Preferred stock(1)	Purchase price of recent transaction	$	1.9		Purchase price	$	1.9
Currency forwards(2)	Third party appraisal	$	1.7		Broker quote	$	1.7
Private equity securities(1)	Purchase price of recent transaction	$	1.0		Purchase price	$	10.0
Equity warrants(2)	Option pricing model	$	0.9		Strike price	$	0.2
Preferred stock(1)	Purchase price of recent transaction	$	0.7		Purchase price	$	0.70
Private equity securities(1)	Purchase price of recent transaction	$	0.3		Purchase price	$	0.3
Weather derivatives(2)	Third party appraisal	$	(13.9	)	Broker quote	$	(13.9	)
Contingent consideration	External valuation model	$	(28.3	)	Discounted future payments	$	(28.3	)

⁽¹⁾As of March 31, 2020, each asset type consists of one security.

⁽²⁾SeeNote 12for discussion of derivative instruments.

(Millions, except share prices)	December 31, 2019
Description	Valuation Technique(s)	Fair value			Unobservable input
Private equity securities(1)	Share price of recent transaction	$	32.5		Purchase share price	$	40.6
Loan participation(1)	Purchase price of recent transaction	$	20.0		Purchase price	20.0
Preferred stock(1)	Share price of recent transaction	$	17.5		Purchase price	$	7.74
Private equity securities(1)	Multiple of GAAP book value	$	14.2		Book value multiple	0.9
Preferred stock(1)	Purchase price of recent transaction	$	12.2		Purchase price	$	12.2
Private debt instrument(1)	Purchase price of recent transaction	$	7.2		Purchase price	$	9.0
Weather derivatives(2)	Third party appraisal	$	7.0		Broker quote	$	7.0
Private equity security(1)	Purchase price of recent transaction	$	5.1		Purchase price	$	7.74
Preferred stock(1)	Purchase price of recent transaction	$	4.8		Purchase price	$	4.80
Currency forwards(2)	Third party appraisal	$	2.7		Broker quote	$	2.7
Private equity securities(1)	Purchase price of recent transaction	$	1.0		Purchase price	$	10.0
Equity warrants(2)	Option pricing model	$	0.4		Strike price	$	0.2
Private equity securities(1)	Purchase price of recent transaction	$	0.3		Purchase price	$	0.3
Currency swaps(2)	Third party appraisal	$	(3.6	)	Broker quote	$	(3.6	)
Currency forwards(2)	Third party appraisal	$	(5.7	)	Broker quote	$	(5.7	)
Contingent consideration	External valuation model	$	(28.2	)	Discounted future payments	$	(28.2	)

⁽¹⁾As of December 31, 2019, each asset type consists of one security.

⁽²⁾SeeNote 12for discussion of derivative instruments.

Financial instruments disclosed, but not carried at fair value

Sirius Group uses various financial instruments in the normal course of its business. The carrying values of Cash, Accrued investment income, certain other assets, Accounts payable on unsettled investment purchases, certain other liabilities, and other financial instruments not included in the table below approximated their fair values at March 31, 2020 and December 31, 2019, due to their respective short maturities. As these financial instruments are not actively traded, their respective fair values are classified within Level 3. The following table includes financial instruments for which the carrying value differs from the estimated fair values at March 31, 2020 and December 31, 2019:

	March 31, 2020				December 31, 2019
(Millions)	Fair Value(1)		Carrying Value		Fair Value(1)		Carrying Value
Liabilities, Mezzanine equity, and Non-controlling interest:
2017 SEK Subordinated Notes	$	268.3	$	270.6	$	294.5	$	291.2
2016 SIG Senior Notes	$	394.9	$	394.2	$	394.5	$	394.0
Series B preference shares	$	171.4	$	205.0	$	186.4	$	223.0

⁽¹⁾Fair value estimated by internal pricing and considered a Level 3 measurement.

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Share-based compensation (Tables)

3 Months Ended

Mar. 31, 2020

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Summary of Unrecognized Compensation Cost Associated with Unvested Awards and Weighted Average Period Over Which it is Expected to be Recognized

The following tables present unrecognized compensation cost associated with unvested awards and weighted average period over which it is expected to be recognized:

(Millions)	March 31, 2020
	PSUs - IPO Incentive Awards		PSUs - 2019 Long Term Incentive (LTI)		RSUs		Stock Options		2018 Long Term Incentive Plan (LTIP)
Unrecognized compensation cost related to unvested awards	$	2.6	$	1.1	$	9.8	$	1.8	$	0.2
Weighted average recognition period (years)	1.8 years		1.8 years		1.7 years		1.9 years		0.8 years

Summary of Outstanding Share-settled Awards

The following table summarizes outstanding share-settled awards as of March 31, 2020:

As of and for the quarter ended March 31, 2020	Number of Shares
	PSUs - IPO Incentive Awards	PSUs - 2019 LTI	RSUs	Stock Options	2018 Long Term Incentive Plan (LTIP)
Unvested, beginning of period	555,163	391,136	1,353,852	1,374,945	870,471
Granted	—	—	—	—	—
Vested	—	—	—	—	—
Forfeited	11,967	8,809	33,015	—	14,372
Unvested, end of period	543,196	382,327	1,320,837	1,374,945	856,099

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Investment securities (Tables)

3 Months Ended

Mar. 31, 2020

Investments, Debt and Equity Securities [Abstract]

Schedule of net investment income

Net investment income for the three months ended March 31, 2020 and 2019 consisted of the following:

	For the three months ended March 31,
(Millions)	2020			2019
Fixed maturity investments	$	10.3		$	16.8
Short-term investments	3.3			0.4
Equity securities	2.6			2.7
Other long-term investments	0.2			3.9
Total investment income	16.4			23.8
Investment expenses	(2.9		)	(3.7		)
Net investment income	$	13.5		$	20.1

Schedule of net realized and unrealized investment gains (losses)

Net realized and unrealized investment gains (losses) for the three months ended March 31, 2020 and 2019 consisted of the following:

	For the three months ended March 31,
(Millions)	2020			2019
Gross realized gains	$	42.0		$	14.1
Gross realized (losses)	(21.7		)	(5.1		)
Net realized gains on investments(1)	20.3			9.0
Net unrealized gains (losses) on investments(2)	(43.8		)	74.0
Net realized and unrealized gains (losses) on investments	$	(23.5	)	$	83.0

⁽¹⁾Includes $11.1 and $10.9 of realized gains due to foreign currency for the three months ended March 31, 2020 and 2019, respectively.

⁽²⁾Includes $52.7 and $25.0 of unrealized gains due to foreign currency for the three months ended March 31, 2020 and 2019, respectively.

Schedule of net realized investment gains (losses)

Net realized investment gains for the three months ended March 31, 2020 and 2019 consisted of the following:

	For the three months ended March 31,
(Millions)	2020		2019
Fixed maturity investments	$	7.8	$	6.8
Equity securities	0.5		(0.6		)
Short-term investments	2.8		0.1
Derivative instruments	8.3		(0.6		)
Other long-term investments	0.9		3.3
Net realized investment gains	$	20.3	$	9.0

Schedule of net unrealized investment gains (losses)

The following table summarizes the amount of total gains (losses) included in earnings attributable to unrealized investment gains (losses) for Level 3 investments for the three months ended March 31, 2020 and 2019:

	For the three months ended March 31,
(Millions)	2020			2019
Fixed maturity investments	$	0.3		$	—
Equity securities	—			—
Other long-term investments	(0.9		)	8.8
Total unrealized investment (losses) gains – Level 3 investments	$	(0.6	)	$	8.8

Net unrealized investment gains (losses) for the three months ended March 31, 2020 and 2019 consisted of the following:

	For the three months ended March 31,
(Millions)	2020			2019
Fixed maturity investments	$	7.9		$	29.7
Equity securities	(69.1		)	25.1
Short-term investments	15.7			2.7
Derivative instruments	0.1			(0.6		)
Other long-term investments	1.6			17.1
Net unrealized investment gains (losses)	$	(43.8	)	$	74.0

Schedule of investment securities and other long-term investments

Equity securities at fair value consisted of the following as of March 31, 2020 and December 31, 2019:

(Millions)	March 31, 2020			December 31, 2019
Fixed income mutual funds	$	192.1		$	175.3
Common stocks	184.4			228.1
Other equity securities(1)	(9.9		)	1.8
Total Equity securities	$	366.6		$	405.2

⁽¹⁾Sirius Group engaged in short selling of certain equity securities for which settlement was pending as of March 31, 2020.

Other long-term investments at fair value consisted of the following as of March 31, 2020 and December 31, 2019:

(Millions)	March 31, 2020		December 31, 2019
Hedge funds and private equity funds	$	279.6	$	269.0
Limited liability companies and private equity securities	75.9		77.8
Total other long-term investments	$	355.5	$	346.8

The cost or amortized cost, gross unrealized investment gains (losses), net foreign currency gains (losses), and fair value of Sirius Group's fixed maturity investments as of March 31, 2020 and December 31, 2019, were as follows:

	March 31, 2020
(Millions)	Cost or amortized cost		Gross unrealized gains		Gross unrealized (losses)			Net foreign currency gains (losses)		Fair value
Corporate debt securities	$	424.5	$	2.8	$	(5.0	)	$	22.0	$	444.3
Asset-backed securities	551.9		1.9		(30.1		)	0.7		524.4
Residential mortgage-backed securities	443.5		23.1		(1.2		)	6.5		471.9
U.S. government and government agency	119.9		6.8		(0.1		)	1.6		128.2
Commercial mortgage-backed securities	97.4		1.6		(5.0		)	0.3		94.3
Non-U.S. government and government agency	60.4		0.4		(0.4		)	0.4		60.8
Preferred stocks	5.8		0.9		(0.2		)	—		6.5
U.S. States, municipalities and political subdivision	1.6		—		—			0.1		1.7
Total fixed maturity investments	$	1,705.0	$	37.5	$	(42.0	)	$	31.6	$	1,732.1

	December 31, 2019
(Millions)	Cost or amortized cost		Gross unrealized gains		Gross unrealized (losses)			Net foreign currency gains (losses)			Fair value
Corporate debt securities	$	458.6	$	5.2	$	(1.2	)	$	11.5		$	474.1
Asset-backed securities	489.4		1.4		(3.9		)	(0.1		)	486.8
Residential mortgage-backed securities	426.2		10.5		(1.4		)	3.6			438.9
U.S. government and government agency	111.5		0.7		(0.4		)	(1.3		)	110.5
Commercial mortgage-backed securities	88.5		0.9		(0.6		)	0.2			89.0
Non-U.S. government and government agency	63.7		—		(0.7		)	—			63.0
Preferred stocks	17.0		—		—			—			17.0
U.S. States, municipalities and political subdivision	1.7		—		—			—			1.7
Total fixed maturity investments	$	1,656.6	$	18.7	$	(8.2	)	$	13.9		$	1,681.0

The cost or amortized cost, gross unrealized investment gains and losses, net foreign currency gains, and fair values of Sirius Group's equity securities and other long-term investments as of March 31, 2020 and December 31, 2019, were as follows:

	March 31, 2020
(Millions)	Cost or amortized cost		Gross unrealized gains		Gross unrealized losses			Net foreign currency gains		Fair value
Equity securities	$	409.5	$	37.4	$	(98.4	)	$	18.1	$	366.6
Other long-term investments	$	323.2	$	50.3	$	(31.7	)	$	13.7	$	355.5

	December 31, 2019
(Millions)	Cost or amortized cost		Gross unrealized gains		Gross unrealized losses			Net foreign currency gains		Fair value
Equity securities	$	379.2	$	55.6	$	(37.3	)	$	7.7	$	405.2
Other long-term investments	$	315.4	$	49.9	$	(29.3	)	$	10.8	$	346.8

Schedule of fixed maturity investment by contractual maturity

The cost or amortized cost and fair value of Sirius Group's fixed maturity investments as of March 31, 2020 and December 31, 2019 are presented below by contractual maturity. Actual maturities could differ from contractual maturities because borrowers may have the right to call or prepay certain obligations with or without call or prepayment penalties.

	March 31, 2020				December 31, 2019
(Millions)	Cost or amortized cost		Fair value		Cost or amortized cost		Fair value
Due in one year or less	$	106.2	$	112.9	$	85.0	$	88.4
Due after one year through five years	429.1		446.3		479.1		490.3
Due after five years through ten years	45.9		47.0		46.3		46.0
Due after ten years	25.2		28.8		25.1		24.6
Mortgage-backed and asset-backed securities	1,092.8		1,090.6		1,004.1		1,014.7
Preferred stocks	5.8		6.5		17.0		17.0
Total	$	1,705.0	$	1,732.1	$	1,656.6	$	1,681.0

Schedule of ratings and fair value of fixed maturity investments

The following table summarizes the ratings and fair value of fixed maturity investments held in Sirius Group's investment portfolio as of March 31, 2020 and December 31, 2019:

(Millions)	March 31, 2020		December 31, 2019
AAA	$	588.4	$	559.8
AA	786.8		724.3
A	208.5		219.0
BBB	88.0		95.8
Other	60.4		82.1
Total fixed maturity investments(1)	$	1,732.1	$	1,681.0

⁽¹⁾Credit ratings are assigned based on the following hierarchy: 1) Standard & Poor's ("S&P") and 2) Moody's Investors Service ("Moody's").

Summary of investment securities by investment objective and sector

The following table summarizes investments in hedge funds and private equity interests by investment objective and sector as of March 31, 2020 and December 31, 2019:

	March 31, 2020				December 31, 2019
(Millions)	Fair value		Unfunded commitments		Fair value		Unfunded commitments
Hedge funds:
Long/short multi-sector	$	49.5	$	—	$	53.0	$	—
Distressed mortgage credit	59.4		—		51.6		—
Private credit	21.8		—		21.5		—
Other	1.1		—		1.4		—
Total hedge funds	131.8		—		127.5		—
Private equity funds:
Energy infrastructure & services	51.5		34.1		53.6		34.6
Multi-sector	16.0		7.8		8.7		7.8
Healthcare	28.2		6.8		25.9		10.4
Life settlement	22.9		—		23.9		—
Manufacturing/Industrial	26.3		—		27.6		3.9
Private equity secondaries	0.6		0.8		0.6		0.8
Other	2.3		1.8		1.2		2.6
Total private equity funds	147.8		51.3		141.5		60.1
Total hedge and private equity funds included in Other long-term investments	$	279.6	$	51.3	$	269.0	$	60.1

Schedule of redemption frequency and advance notice period requirements for investments

The following summarizes the March 31, 2020 fair value of hedge funds subject to restrictions on redemption frequency and advance notice period requirements for investments in active hedge funds:

	Notice Period
Redemption Frequency (Millions)	30-59 days notice		60-89 days notice		90-119 days notice		120+ days notice		Total
Monthly	$	—	$	33.5	$	—	$	—	$	33.5
Quarterly	0.6		—		—		—		0.6
Semi-annual	—		0.2		—		—		0.2
Annual	—		16.0		59.6		21.9		97.5
Total	$	0.6	$	49.7	$	59.6	$	21.9	$	131.8

Schedule of investment securities by lock-up period.

As of March 31, 2020, investments in private equity funds were subject to lock-up periods as follows:

(Millions)	1 - 3 years		3 – 5 years		5 – 10 years		Total
Private Equity Funds – expected lock up period remaining	$	9.1	$	2.1	$	136.6	$	147.8

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Variable interest entities (Tables)

3 Months Ended

Mar. 31, 2020

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Schedule of assets and liabilities related to the consolidated VIEs

The following table presents Alstead Re's assets and liabilities, as classified in the Consolidated Balance Sheets as of March 31, 2020 and December 31, 2019:

(Millions)	March 31, 2020			December 31, 2019
Assets:
Fixed maturity investments	$	3.6		$	3.9
Short-term investments	0.5			0.5
Cash	0.1			0.1
Total investments	4.2			4.5
Insurance and reinsurance premiums receivable	(0.5		)	(0.3		)
Funds held by ceding companies	3.4			3.4
Deferred acquisition costs	0.1			0.3
Other assets	—			—
Total assets	$	7.2		$	7.9
Liabilities
Loss and loss adjustment expense reserves	$	0.4		$	0.5
Unearned insurance and reinsurance premiums	0.1			0.6
Other liabilities	0.1			0.1
Total liabilities	$	0.6		$	1.2

Schedule of total assets of unconsolidated VIEs

The following table presents total assets of unconsolidated VIEs in which Sirius Group holds a variable interest, as well as the maximum exposure to loss associated with these VIEs:

			Maximum Exposure to Loss
(Millions)	Total VIE Assets		On-Balance Sheet		Off-Balance Sheet		Total
March 31, 2020
Other long-term investments(1)	$	250.7	$	103.0	$	8.8	$	111.8
Total at March 31, 2020	$	250.7	$	103.0	$	8.8	$	111.8
December 31, 2019
Other long-term investments(1)	$	257.8	$	102.6	$	16.3	$	118.9
Total at December 31, 2019	$	257.8	$	102.6	$	16.3	$	118.9

⁽¹⁾Comprised primarily of hedge funds and private equity funds.

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Fair value measurements - Significant unobservable inputs (Details) $ in Thousands	Mar. 31, 2020 USD ($) $ / shares	Dec. 31, 2019 USD ($) $ / shares
Significant Unobservable Inputs
Equity securities	$ 366,600	$ 405,200
Derivative assets	11,700	11,400
Derivative liabilities	(20,400)	(9,500)
Contingent consideration	(28,300)	(28,200)
Level 3 Inputs
Significant Unobservable Inputs
Equity securities	0	0
Derivative assets	10,700	10,100
Derivative liabilities	(19,600)	(9,300)
Contingent consideration	(28,300)	(28,200)
Level 3 Inputs | Share price of recent transaction | Private equity securities
Significant Unobservable Inputs
Equity securities	32,500	32,500
Level 3 Inputs | Share price of recent transaction | Preferred stock
Significant Unobservable Inputs
Equity securities	$ 17,500	$ 17,500
Level 3 Inputs | Share price of recent transaction | Purchase share price | Private equity securities
Significant Unobservable Inputs
Equity securities, measurement input | $ / shares	40.6	40.6
Level 3 Inputs | Share price of recent transaction | Purchase price | Preferred stock
Significant Unobservable Inputs
Equity securities, measurement input | $ / shares	7.74	7.74
Level 3 Inputs | Purchase price of recent transaction | Loan participation
Significant Unobservable Inputs
Equity securities	$ 19,900	$ 20,000
Equity securities, measurement input		20,000
Level 3 Inputs | Purchase price of recent transaction | Private debt instrument
Significant Unobservable Inputs
Debt securities, trading	6,200	$ 7,200
Level 3 Inputs | Purchase price of recent transaction | Private equity securities
Significant Unobservable Inputs
Equity securities	5,100	300
Level 3 Inputs | Purchase price of recent transaction | Preferred stock
Significant Unobservable Inputs
Equity securities	1,900	12,200
Level 3 Inputs | Purchase price of recent transaction | Private equity funds
Significant Unobservable Inputs
Equity securities	1,000	5,100
Level 3 Inputs | Purchase price of recent transaction | Preferred stock
Significant Unobservable Inputs
Equity securities	700	4,800
Level 3 Inputs | Purchase price of recent transaction | Private equity securities
Significant Unobservable Inputs
Equity securities	$ 300
Level 3 Inputs | Purchase price of recent transaction | Private equity securities
Significant Unobservable Inputs
Equity securities		1,000
Level 3 Inputs | Purchase price of recent transaction | Purchase price | Private debt instrument
Significant Unobservable Inputs
Private debt instrument, measurement input, value		9,000
Level 3 Inputs | Purchase price of recent transaction | Purchase price | Private equity securities
Significant Unobservable Inputs
Equity securities, measurement input, value		300
Equity securities, measurement input | $ / shares	7.74
Level 3 Inputs | Purchase price of recent transaction | Purchase price | Preferred stock
Significant Unobservable Inputs
Equity securities, measurement input, value	$ 1,900	$ 12,200
Level 3 Inputs | Purchase price of recent transaction | Purchase price | Private equity funds
Significant Unobservable Inputs
Equity securities, measurement input, value	0
Equity securities, measurement input | $ / shares		7.74
Level 3 Inputs | Purchase price of recent transaction | Purchase price | Preferred stock
Significant Unobservable Inputs
Equity securities, measurement input, value	700	$ 4,800
Level 3 Inputs | Purchase price of recent transaction | Purchase price | Private equity securities
Significant Unobservable Inputs
Equity securities, measurement input, value	300
Level 3 Inputs | Purchase price of recent transaction | Purchase price | Private equity securities
Significant Unobservable Inputs
Equity securities, measurement input | $ / shares		10.0
Level 3 Inputs | Multiple of GAAP book value | Private equity securities
Significant Unobservable Inputs
Equity securities	13,300	$ 14,200
Level 3 Inputs | Multiple of GAAP book value | Book value multiple | Private equity securities
Significant Unobservable Inputs
Equity securities, measurement input | $ / shares		0.9
Level 3 Inputs | Third party appraisal | Weather derivatives
Significant Unobservable Inputs
Derivative assets		$ 7,000
Derivative liabilities	(13,900)
Level 3 Inputs | Third party appraisal | Currency forwards
Significant Unobservable Inputs
Derivative assets	1,700	(2,700)
Level 3 Inputs | Third party appraisal | Foreign currency swaps
Significant Unobservable Inputs
Derivative assets	2,400
Derivative liabilities		(3,600)
Level 3 Inputs | Third party appraisal | Currency forwards
Significant Unobservable Inputs
Derivative liabilities		(5,700)
Level 3 Inputs | Third party appraisal | Broker quote | Weather derivatives
Significant Unobservable Inputs
Derivative assets, measurement input, value		7,000
Derivative liabilities, measurement input, value	(13,900)
Level 3 Inputs | Third party appraisal | Broker quote | Currency forwards
Significant Unobservable Inputs
Derivative assets, measurement input, value	(1,700)	2,700
Level 3 Inputs | Third party appraisal | Broker quote | Foreign currency swaps
Significant Unobservable Inputs
Derivative assets, measurement input, value	(2,400)
Derivative liabilities, measurement input, value		(3,600)
Level 3 Inputs | Third party appraisal | Broker quote | Currency forwards
Significant Unobservable Inputs
Derivative liabilities, measurement input, value		(5,700)
Level 3 Inputs | Option pricing model
Significant Unobservable Inputs
Equity securities	900	400
Level 3 Inputs | Option pricing model | Strike price
Significant Unobservable Inputs
Equity securities, measurement input, value	200	200
Level 3 Inputs | External valuation model
Significant Unobservable Inputs
Contingent consideration	(28,300)	(28,200)
Level 3 Inputs | External valuation model | Discounted future payments
Significant Unobservable Inputs
Contingent consideration, measurement input, value	$ (28,300)	$ (28,200)
Minimum | Level 3 Inputs | Purchase price of recent transaction | Comparable yields | Loan participation
Significant Unobservable Inputs
Equity securities, measurement input	0.04
Minimum | Level 3 Inputs | Purchase price of recent transaction | Discount yield | Private debt instrument
Significant Unobservable Inputs
Debt Securities, Trading, Measurement Input	0.1187
Minimum | Level 3 Inputs | Multiple of GAAP book value | Book value multiple | Private equity securities
Significant Unobservable Inputs
Equity securities, measurement input | $ / shares	0.73
Maximum | Level 3 Inputs | Purchase price of recent transaction | Comparable yields | Loan participation
Significant Unobservable Inputs
Equity securities, measurement input	0.07
Maximum | Level 3 Inputs | Purchase price of recent transaction | Discount yield | Private debt instrument
Significant Unobservable Inputs
Debt Securities, Trading, Measurement Input	0.1232
Maximum | Level 3 Inputs | Multiple of GAAP book value | Book value multiple | Private equity securities
Significant Unobservable Inputs
Equity securities, measurement input | $ / shares	0.91
Median | Level 3 Inputs | Purchase price of recent transaction | Comparable yields | Loan participation
Significant Unobservable Inputs
Equity securities, measurement input	0.06
Median | Level 3 Inputs | Purchase price of recent transaction | Discount yield | Private debt instrument
Significant Unobservable Inputs
Debt Securities, Trading, Measurement Input	0.1208
Median | Level 3 Inputs | Multiple of GAAP book value | Book value multiple | Private equity securities
Significant Unobservable Inputs
Equity securities, measurement input | $ / shares	0.82

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Investment securities - Net realized and unrealized investment gains (losses) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Net realized and unrealized investment gains (losses)
Gross realized gains	$ 42.0	$ 14.1
Gross realized (losses)	(21.7)	(5.1)
Net realized gains on investments	20.3	9.0
Net unrealized investment gains (losses)	(43.8)	74.0
Net realized and unrealized gains (losses) on investments	(23.5)	83.0
Realized gains due to foreign currency	11.1	10.9
Unrealized (losses) gains due to foreign currency	52.7	25.0
Total unrealized investment (losses) gains – Level 3 investments	(0.6)	8.8
Fixed maturity investments
Net realized and unrealized investment gains (losses)
Net realized gains on investments	7.8	6.8
Net unrealized investment gains (losses)	7.9	29.7
Total unrealized investment (losses) gains – Level 3 investments	0.3	0.0
Equity securities
Net realized and unrealized investment gains (losses)
Net realized gains on investments	0.5	(0.6)
Net unrealized investment gains (losses)	(69.1)	25.1
Total unrealized investment (losses) gains – Level 3 investments	0.0	0.0
Short-term investments
Net realized and unrealized investment gains (losses)
Net realized gains on investments	2.8	0.1
Net unrealized investment gains (losses)	15.7	2.7
Derivative instruments
Net realized and unrealized investment gains (losses)
Net realized gains on investments	8.3	(0.6)
Net unrealized investment gains (losses)	0.1	(0.6)
Other long-term investments
Net realized and unrealized investment gains (losses)
Net realized gains on investments	0.9	3.3
Net unrealized investment gains (losses)	1.6	17.1
Total unrealized investment (losses) gains – Level 3 investments	$ (0.9)	$ 8.8

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Investment securities - Hedge Funds redemption frequency and Private Equity Fund lock-up period (Details) - Other long-term investments - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Equity securities and Other long-term investments
Fair value	$ 355.5	$ 346.8
Hedge funds:
Equity securities and Other long-term investments
Fair value	131.8	127.5
Hedge funds: | Monthly Redemption Frequency
Equity securities and Other long-term investments
Fair value	33.5
Hedge funds: | Quarterly Redemption Frequency
Equity securities and Other long-term investments
Fair value	0.6
Hedge funds: | Semi-annual Redemption Frequency
Equity securities and Other long-term investments
Fair value	0.2
Hedge funds: | Annual Redemption Frequency
Equity securities and Other long-term investments
Fair value	97.5
Private equity funds:
Equity securities and Other long-term investments
Fair value	147.8	$ 141.5
Private equity funds: | Lock up period of 1 - 3 years
Equity securities and Other long-term investments
Fair value	9.1
Private equity funds: | Lock up period of 3 - 5 years
Equity securities and Other long-term investments
Fair value	2.1
Private equity funds: | Lock up period of 5 - 10 years
Equity securities and Other long-term investments
Fair value	136.6
30-59 days notice | Hedge funds:
Equity securities and Other long-term investments
Fair value	0.6
30-59 days notice | Hedge funds: | Monthly Redemption Frequency
Equity securities and Other long-term investments
Fair value	0.0
30-59 days notice | Hedge funds: | Quarterly Redemption Frequency
Equity securities and Other long-term investments
Fair value	0.6
30-59 days notice | Hedge funds: | Semi-annual Redemption Frequency
Equity securities and Other long-term investments
Fair value	0.0
30-59 days notice | Hedge funds: | Annual Redemption Frequency
Equity securities and Other long-term investments
Fair value	0.0
60-89 days notice | Hedge funds:
Equity securities and Other long-term investments
Fair value	49.7
60-89 days notice | Hedge funds: | Monthly Redemption Frequency
Equity securities and Other long-term investments
Fair value	33.5
60-89 days notice | Hedge funds: | Quarterly Redemption Frequency
Equity securities and Other long-term investments
Fair value	0.0
60-89 days notice | Hedge funds: | Semi-annual Redemption Frequency
Equity securities and Other long-term investments
Fair value	0.2
60-89 days notice | Hedge funds: | Annual Redemption Frequency
Equity securities and Other long-term investments
Fair value	16.0
90-119 days notice | Hedge funds:
Equity securities and Other long-term investments
Fair value	59.6
90-119 days notice | Hedge funds: | Monthly Redemption Frequency
Equity securities and Other long-term investments
Fair value	0.0
90-119 days notice | Hedge funds: | Quarterly Redemption Frequency
Equity securities and Other long-term investments
Fair value	0.0
90-119 days notice | Hedge funds: | Semi-annual Redemption Frequency
Equity securities and Other long-term investments
Fair value	0.0
90-119 days notice | Hedge funds: | Annual Redemption Frequency
Equity securities and Other long-term investments
Fair value	59.6
120+ days notice | Hedge funds:
Equity securities and Other long-term investments
Fair value	21.9
120+ days notice | Hedge funds: | Monthly Redemption Frequency
Equity securities and Other long-term investments
Fair value	0.0
120+ days notice | Hedge funds: | Quarterly Redemption Frequency
Equity securities and Other long-term investments
Fair value	0.0
120+ days notice | Hedge funds: | Semi-annual Redemption Frequency
Equity securities and Other long-term investments
Fair value	0.0
120+ days notice | Hedge funds: | Annual Redemption Frequency
Equity securities and Other long-term investments
Fair value	$ 21.9

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Consolidated Statements of (Loss) Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Revenues
Net earned insurance and reinsurance premiums	$ 434.7	$ 311.9
Net investment income	13.5	20.1
Net realized investment gains	20.3	9.0
Net unrealized investment (losses) gains	(43.8)	74.0
Net foreign exchange gains	18.5	5.1
Other revenue	4.3	19.6
Total revenues	447.5	439.7
Expenses
Loss and loss adjustment expenses	427.1	183.9
Insurance and reinsurance acquisition expenses	74.7	63.3
Other underwriting expenses	38.0	35.3
General and administrative expenses	32.1	24.4
Intangible asset amortization expenses	3.9	3.9
Interest expense on debt	7.8	7.6
Total expenses	583.6	318.4
Pre-tax (loss) income	(136.1)	121.3
Income tax benefit (expense)	14.8	(17.2)
Net (loss) income	(121.3)	104.1
Income attributable to non-controlling interests	(0.2)	(0.4)
(Loss) income attributable to Sirius Group	(121.5)	103.7
Change in carrying value of Series B preference shares	23.4	(8.4)
Net (loss) income attributable to Sirius Group's common shareholders	$ (98.1)	$ 95.3
Net (loss) income per common share and common share equivalent
Basic earnings per common share and common share equivalent (in usd per share)	$ (0.85)	$ 0.75
Diluted earnings per common share and common share equivalent (in usd per share)	$ (0.96)	$ 0.74
Weighted average number of common shares and common share equivalents outstanding:
Basic weighted average number of common shares and common share equivalents outstanding (in shares)	115,262,302	115,182,331
Diluted weighted average number of common shares and common share equivalents outstanding (in shares)	127,163,972	127,335,314

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General

3 Months Ended

Mar. 31, 2020

Organization, Consolidation and Presentation of Financial Statements [Abstract]

General

General

Sirius International Insurance Group, Ltd. ("the Company") is a Bermuda exempted company that provides multi-line insurance and reinsurance on a worldwide basis through its subsidiaries (collectively with the Company, "Sirius Group").

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Investments in unconsolidated entities - Other long-term investments (Details) - USD ($)	Mar. 31, 2020	Dec. 31, 2019
Investments in unconsolidated entities
Other long-term investments	$ 355,500,000	$ 346,800,000
Equity method investments	0	0
Investments in unconsolidated entities
Investments in unconsolidated entities
Other long-term investments	355,500,000	346,800,000
Investments in unconsolidated entities | Equity method eligible investments
Investments in unconsolidated entities
Other long-term investments	151,800,000	151,900,000
Investments in unconsolidated entities | Equity method ineligible investments
Investments in unconsolidated entities
Other long-term investments	$ 203,700,000	$ 194,900,000

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Common shareholder's equity, mezzanine equity, and non controlling interests - Common shareholder's equity (Details) - $ / shares	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Common shareholder's equity
Common shares authorized (in shares)	500,000,000
Common shares par value (in usd per share)	$ 0.01
Preference shares authorized / designated ( in shares)	100,000,000
Preference shares par value (usd per share)	$ 0.01
Changes in common shareholders' equity
Shares issued, beginning of period (in shares)	115,299,341	115,151,251
Shares outstanding, beginning of period (in shares)	115,299,341	115,151,251
Issuance of shares to directors and employees (in shares)	0	111,052
Shares issued, end of period (in shares)	115,299,341	115,262,303
Shares outstanding, end of period (in shares)	115,299,341	115,262,303

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Commitments and contingencies - Lease balances (Details) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
Operating lease right-of-use assets	$ 26.1	$ 27.4
Current lease liabilities	7.6	8.3
Non-current lease liabilities	$ 20.2	$ 21.0

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Third party reinsurance

3 Months Ended

Mar. 31, 2020

Insurance [Abstract]

Third party reinsurance

Third party reinsurance

In the normal course of business, Sirius Group seeks to protect its businesses from losses due to concentration of risk and losses arising from catastrophic events by reinsuring with third-party reinsurers. Sirius Group remains liable for risks reinsured in the event that the reinsurer does not honor its obligations under reinsurance contracts.

At March 31, 2020, Sirius Group had reinsurance recoverables on paid losses of $85.7 million and reinsurance recoverables of $444.2 million on unpaid losses. At December 31, 2019, Sirius Group had reinsurance recoverables on paid losses of $73.9 million and reinsurance recoverables of $410.3 million on unpaid losses. Because retrocessional reinsurance contracts do not relieve Sirius Group of its obligation to its insureds, the collectability of balances due from Sirius Group's reinsurers is important to its financial strength. Sirius Group monitors the financial strength and ratings of retrocessionaires on an ongoing basis. Uncollectible amounts historically have not been significant. (See Note 7.)

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Debt and standby letters of credit facilities

3 Months Ended

Mar. 31, 2020

Debt Disclosure [Abstract]

Debt and standby letters of credit facilities

Debt and standby letters of credit facilities

Sirius Group's debt outstanding as of March 31, 2020 and December 31, 2019 consisted of the following:

(Millions)	March 31, 2020			Effective Rate(1)		December 31, 2019			Effective Rate(1)
2017 SEK Subordinated Notes, at face value	$	274.2		4.2	%	$	295.0		4.0	%
Unamortized issuance costs	(3.6		)			(3.8		)
2017 SEK Subordinated Notes, carrying value	270.6					291.2
2016 SIG Senior Notes, at face value	400.0			4.7	%	400.0			4.7	%
Unamortized discount	(2.2		)			(2.3		)
Unamortized issuance costs	(3.6		)			(3.7		)
2016 SIG Senior Notes, carrying value	394.2					394.0
Total debt	$	664.8				$	685.2

⁽¹⁾ Effective rate considers the effect of the debt issuance costs.

2017 SEK Subordinated Notes

On September 22, 2017, Sirius Group issued floating rate callable subordinated notes denominated in Swedish kronor ("SEK") in the amount of SEK 2,750.0 million (or $346.1 million on date of issuance) at a 100% issue price ("2017 SEK Subordinated Notes"). The 2017 SEK Subordinated Notes were issued in an offering that was exempt from the registration requirements of the Securities Act of 1933 (the "Securities Act"). The 2017 SEK Subordinated Notes bear interest on their principal amount at a floating rate equal to the applicable Stockholm Interbank Offered Rate ("STIBOR") for the relevant interest period plus an applicable margin, payable quarterly in arrears on March 22, June 22, September 22, and December 22 in each year commencing on December 22, 2017, until maturity in September 2047.

Beginning on September 22, 2022, the 2017 SEK Subordinated Notes may be redeemed, in whole or in part, at Sirius Group's option. In addition, within 90 days following the occurrence of a Specified Event (as defined below), the 2017 SEK Subordinated Notes may be redeemed, in whole but not in part, at Sirius Group's option. "Specified Event" means (a) an "Additional Amounts Event" in connection with a change in laws, rules or regulations as a result of which Sirius Group is obligated to pay additional amounts on the notes in respect of any withholding or deduction for taxes, (b) a "Tax Event" in connection with a change in laws, rules or regulations as a result of which interest on the notes is no longer fully deductible by Sirius Group for income tax purposes in the applicable jurisdiction (to the extent that such interest was so deductible as of the time of such Tax Event), (c) a "Rating Methodology Event" in connection with a change in, or clarification to, the rating methodology of Standard & Poor's or Fitch that results in a materially unfavorable capital treatment of the notes, or (d) a "Regulatory Event" in connection with a change in, or clarification to, applicable supervisory regulations that results in the notes no longer qualifying as Tier 2 Capital.

Sirius Group incurred $4.6 million in expenses related to the issuance of the 2017 SEK Subordinated Notes (including SEK 27.5 million, or $3.5 million, in underwriting fees), which have been deferred and are being recognized into interest expense over the life of the 2017 SEK Subordinated Notes. For the three months ended March 31, 2020 and 2019, Sirius Group recognized $20.6 million and $11.0 million, respectively, of foreign currency exchange gains on the remeasurement of the 2017 SEK Subordinated Notes into USD from SEK.

Taking into effect the amortization of all underwriting and issuance expenses, and applicable STIBOR, the 2017 SEK Subordinated Notes yielded an effective rate of approximately 4.2% and 3.7% annualized for the three months ended March 31, 2020 and 2019, respectively. Sirius Group recorded $3.0 million and $2.8 million of interest expense, inclusive of amortization of issuance costs on the 2017 SEK Subordinated Notes for the three months ended March 31, 2020 and 2019, respectively.

2016 SIG Senior Notes

On November 1, 2016, Sirius Group issued $400.0 million face value of senior unsecured notes ("2016 SIG Senior Notes") at an issue price of 99.209% for net proceeds of $392.4 million after taking into effect both deferrable and non-deferrable issuance costs. The 2016 SIG Senior Notes were issued in an offering that was exempt from the registration requirements of the Securities Act. The 2016 SIG Senior Notes bear an annual interest rate of 4.6%, payable semi-annually in arrears on May 1, and November 1, in each year commencing on May 1, 2017, until maturity in November 2026.

Sirius Group incurred $5.1 million in expenses related to the issuance of the 2016 SIG Senior Notes (including $3.4 million in underwriting fees), which have been deferred and are being recognized into interest expense over the life of the 2016 SIG Senior Notes.

Taking into effect the amortization of the original issue discount and all underwriting and issuance expenses, the 2016 SIG Senior Notes yield an effective rate of approximately 4.7% per annum. Sirius Group recorded $4.8 million, inclusive of amortization of issuance costs on the 2016 SIG Senior Notes, for both three month periods ended March 31, 2020 and 2019.

Standby Letter of Credit Facilities

On November 9, 2019, Sirius International Insurance Corporation ("Sirius International"), a wholly owned subsidiary of the Company, renewed two standby letter of credit facility agreements totaling $125 million to provide capital support for Lloyd's Syndicate 1945. The first letter of credit is a renewal of a $90 million facility with Nordea Bank Finland Abp, London Branch, which is issued on an unsecured basis. The second letter of credit is a $35 million facility with DNB Bank ASA, Sweden Branch, $25 million of which is issued on an unsecured basis. Each facility is renewable annually. The above referenced facilities are subject to various affirmative, negative and financial covenants that the Company considers to be customary for such borrowings, including certain minimum net worth and maximum debt to capitalization standards.

Sirius International has other secured letter of credit and trust arrangements with various financial institutions to support its insurance operations. As of March 31, 2020 and December 31, 2019, these secured letter of credit and trust arrangements were collateralized by pledged assets and assets in trust of SEK 3.4 billion and SEK 3.4 billion, respectively, or $335.6 million and $363.3 million, respectively (based on the March 31, 2020 and December 31, 2019 SEK to USD exchange rates). As of March 31, 2020 and December 31, 2019, Sirius America Insurance Company's trust arrangements were collateralized by pledged assets and assets in trust of $47.8 million and $57.7 million, respectively. As of March 31, 2020 and December 31, 2019, Sirius Bermuda's trust arrangements were collateralized by pledged assets and assets in trust of $513.8 million and $784.0 million, respectively.

Revolving Credit Facility

In February 2018, Sirius Group, through its indirectly wholly-owned subsidiary Sirius International Group, Ltd. entered into a three-year, $300 million senior unsecured revolving credit facility (the "Facility"). The Facility provides access to loans for working capital and general corporate purposes, and letters of credit to support obligations under insurance and reinsurance agreements and retrocessional agreements. The Facility is subject to various affirmative, negative and financial covenants that Sirius Group considers to be customary for such borrowings, including certain minimum net worth, maximum debt to capitalization, financial strength rating standards, and change in control provisions. As of March 31, 2020, there were no outstanding borrowings under the Facility.

Debt and Standby Letter of Credit Facility Covenants

As of March 31, 2020, Sirius Group was in compliance with all of the covenants under the 2017 SEK Subordinated Notes, the 2016 SIG Senior Notes, the Nordea Bank Finland Abp, London Branch facility, and the DNB Bank ASA, Sweden Branch facility. In addition, as of March 31, 2020, Sirius Group was in compliance with all of the covenants under the Facility.

Interest

Total interest expense incurred by Sirius Group for its indebtedness for the three months ended March 31, 2020 and 2019 was $7.8 million and $7.6 million, respectively. Total interest paid by Sirius Group for its indebtedness for the three months ended March 31, 2020 and 2019 was $2.8 million and $2.7 million, respectively.

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Investments in unconsolidated entities (Tables)

3 Months Ended

Mar. 31, 2020

Investments in unconsolidated entities

Schedule of components of Other long-term investments

The following table presents the components of Other long-term investments as of March 31, 2020 and December 31, 2019:

(Millions)	March 31, 2020		December 31, 2019
Equity method eligible unconsolidated entities, at fair value	$	151.8	$	151.9
Other unconsolidated investments, at fair value(1)	203.7		194.9
Total Other long-term investments(2)	$	355.5	$	346.8

⁽¹⁾Includes Other long-term investments that are not equity method eligible.

⁽²⁾There were no investments accounted for using the equity method as of March 31, 2020 and December 31, 2019.

Schedule of investments in equity method eligible unconsolidated entities

The following table presents Sirius Group's investments in equity method eligible unconsolidated entities as of March 31, 2020 and December 31, 2019:

	Ownership interest as of
Investee	March 31, 2020		December 31, 2019		Instrument Held
BE Reinsurance Limited	24.9	%	24.9	%	Common shares
BioVentures Investors (Offshore) IV LP	73.0	%	73.0	%	Units
Camden Partners Strategic Fund V (Cayman), LP	39.4	%	39.4	%	Units
Diamond LS I LP	16.0	%	16.0	%	Units
Gateway Fund LP	19.3	%	15.0	%	Units
Monarch	12.8	%	12.8	%	Units
New Energy Capital Infrastructure Credit Fund LP	30.5	%	30.5	%	Units
New Energy Capital Infrastructure Offshore Credit Fund LP	30.5	%	30.5	%	Units
Pie Preferred Stock(1)	30.1	%	30.1	%	Preferred shares
Pie Series B Preferred Stock(1)	22.4	%	22.4	%	Preferred shares
Quintana Energy Partners	21.8	%	21.8	%	Units
Tuckerman Capital V LP	48.3	%	48.3	%	Units
Tuckerman Capital V Co-Investment I LP	48.3	%	48.1	%	Units

⁽¹⁾Sirius Group holds investments in several financing instruments of Pie Insurance Holding, Inc.

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Derivatives (Tables)

3 Months Ended

Mar. 31, 2020

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of classification and amount of fair value of derivatives not designated as hedging instruments within Consolidated Balance Sheets

The following tables summarize information on the classification and amount of the fair value of derivatives not designated as hedging instruments within the Company's Consolidated Balance Sheets as at March 31, 2020 and December 31, 2019:

(Millions)	March 31, 2020						December 31, 2019
Derivatives not designated as hedging instruments	Notional Value		Asset derivative at fair value(1)		Liability derivative at fair value(2)		Notional Value			Asset derivative at fair value(1)		Liability derivative at fair value(2)
Interest rate cap	$	250.0	$	—	$	—	$	250.0		$	—	$	—
Foreign currency swaps	$	90.0	$	2.4	$	—	$	90.0		$	—	$	3.6
Foreign currency forwards	$	215.2	$	7.3	$	5.7	$	(30.0	)	$	2.7	$	5.7
Weather derivatives	$	105.9	$	—	$	13.9	$	110.7		$	7.0	$	—
Equity futures contracts	$	20.1	$	—	$	—	$	34.5		$	—	$	—
Equity call options	$	1.9	$	0.1	$	—	$	—		$	—	$	—
Equity put options	$	11.4	$	1.0	$	0.8	$	31.0		$	1.3	$	0.2
Equity warrants	$	0.9	$	0.9	$	—	$	0.4		$	0.4	$	—

⁽¹⁾Asset derivatives are classified within Other assets within the Company's Consolidated Balance Sheets at March 31, 2020 and December 31, 2019.

⁽²⁾Liability derivatives are classified within Other liabilities within the Company's Consolidated Balance Sheets at March 31, 2020 and December 31, 2019.

Schedule of classification and net impact on earnings, recognized in Consolidated Statements of Income relating to derivatives

The following table summarizes information on the classification and net impact on earnings, recognized in the Company's Consolidated Statements of Income relating to derivatives during the three months ended March 31, 2020 and 2019:

(Millions)		For the three months ended March 31,
Derivatives not designated as hedging instruments	Classification of gains (losses) recognized in earnings	2020			2019
Interest rate cap	Other revenues	$	—		$	(0.1	)
Foreign currency swaps	Net foreign exchange gains	$	6.0		$	0.8
Foreign currency forwards	Net foreign exchange gains	$	0.5		$	0.2
Weather derivatives	Other revenues	$	(20.4	)	$	(6.0	)
Equity futures contracts	Net realized investment gains (losses)	$	2.9		$	(0.6	)
Equity futures contracts	Net unrealized investment gains	$	(1.0	)	$	(0.2	)
Equity put options	Net realized investment gains (losses)	$	5.5		$	—
Equity put options	Net unrealized investment gains	$	0.5		$	(0.4	)
Equity warrants	Net unrealized investment gains	$	0.5		$	—

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Allowance for expected credit losses (Tables)

3 Months Ended

Mar. 31, 2020

Credit Loss [Abstract]

Summary of allowance for expected credit losses

As of March 31, 2020, Sirius Group's allowance for expected credit losses is as follows:

(in millions)	Gross Assets in Scope		Allowance for Expected Credit Losses
Premiums receivable & Funds held by ceding companies	$	1,224.7	$	10.6
Reinsurance recoverable on unpaid and paid loss	529.9		3.9
MGU Trade receivables(1)	25.6		0.4
Total as of March 31, 2020	$	1,780.2	$	14.9

⁽¹⁾Included as part of Other assets on the Consolidated Balance Sheet

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Investment securities - Fixed maturity investments (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Fixed maturity investments
Cost or amortized cost	$ 1,705.0	$ 1,656.6
Gross unrealized gains	37.5	18.7
Gross unrealized losses	(42.0)	(8.2)
Net foreign currency gains (losses)	31.6	13.9
Fair value	$ 1,732.1	1,681.0
Weighted average duration of fixed income portfolio including short-term investments	1 year 6 months
Weighted average duration of fixed income portfolio excluding short-term investments	2 years 3 months
Cost or amortized cost
Due in one year or less	$ 106.2	85.0
Due after one year through five years	429.1	479.1
Due after five years through ten years	45.9	46.3
Due after ten years	25.2	25.1
Fair value
Due in one year or less	112.9	88.4
Due after one year through five years	446.3	490.3
Due after five years through ten years	47.0	46.0
Due after ten years	28.8	24.6
Fixed maturity investments
Fixed maturity investments
Fair value	1,732.1	1,681.0
Fixed maturity investments | AAA
Fixed maturity investments
Fair value	588.4	559.8
Fixed maturity investments | AA
Fixed maturity investments
Fair value	786.8	724.3
Fixed maturity investments | A
Fixed maturity investments
Fair value	208.5	219.0
Fixed maturity investments | BBB
Fixed maturity investments
Fair value	88.0	95.8
Fixed maturity investments | Other
Fixed maturity investments
Fair value	60.4	82.1
Corporate debt securities
Fixed maturity investments
Cost or amortized cost	424.5	458.6
Gross unrealized gains	2.8	5.2
Gross unrealized losses	(5.0)	(1.2)
Net foreign currency gains (losses)	22.0	11.5
Fair value	444.3	474.1
Asset-backed securities
Fixed maturity investments
Cost or amortized cost	551.9	489.4
Gross unrealized gains	1.9	1.4
Gross unrealized losses	(30.1)	(3.9)
Net foreign currency gains (losses)	0.7	(0.1)
Fair value	524.4	486.8
Residential mortgage-backed securities
Fixed maturity investments
Cost or amortized cost	443.5	426.2
Gross unrealized gains	23.1	10.5
Gross unrealized losses	(1.2)	(1.4)
Net foreign currency gains (losses)	6.5	3.6
Fair value	471.9	438.9
U.S. Government and government agency
Fixed maturity investments
Cost or amortized cost	119.9	111.5
Gross unrealized gains	6.8	0.7
Gross unrealized losses	(0.1)	(0.4)
Net foreign currency gains (losses)	1.6	(1.3)
Fair value	128.2	110.5
Commercial mortgage-backed securities
Fixed maturity investments
Cost or amortized cost	97.4	88.5
Gross unrealized gains	1.6	0.9
Gross unrealized losses	(5.0)	(0.6)
Net foreign currency gains (losses)	0.3	0.2
Fair value	94.3	89.0
Non-U.S. government and government agency
Fixed maturity investments
Cost or amortized cost	60.4	63.7
Gross unrealized gains	0.4	0.0
Gross unrealized losses	(0.4)	(0.7)
Net foreign currency gains (losses)	0.4	0.0
Fair value	60.8	63.0
Preferred stocks
Fixed maturity investments
Cost or amortized cost	5.8	17.0
Gross unrealized gains	0.9	0.0
Gross unrealized losses	(0.2)	0.0
Net foreign currency gains (losses)	0.0	0.0
Fair value	6.5	17.0
Cost or amortized cost
Cost or amortized cost without single maturity date	5.8	17.0
Fair value
Fair value without single maturity date	6.5	17.0
U.S. States, municipalities and political subdivision
Fixed maturity investments
Cost or amortized cost	1.6	1.7
Gross unrealized gains	0.0	0.0
Gross unrealized losses	0.0	0.0
Net foreign currency gains (losses)	0.1	0.0
Fair value	1.7	1.7
Mortgage-backed and asset-backed securities
Cost or amortized cost
Cost or amortized cost without single maturity date	1,092.8	1,004.1
Fair value
Fair value without single maturity date	1,090.6	1,014.7
Subprime | Fixed maturity investments
Fixed maturity investments
Fair value	37.8	43.3
Subprime | Fixed maturity investments | AAA
Fixed maturity investments
Fair value	18.3	21.7
Subprime | Fixed maturity investments | AA
Fixed maturity investments
Fair value	17.2	18.4
Subprime | Fixed maturity investments | A
Fixed maturity investments
Fair value	2.2	3.1
Subprime | Fixed maturity investments | Other
Fixed maturity investments
Fair value	$ 0.1	$ 0.1

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Investment securities - Investments held on deposit or as collateral and Unsettled investment purchases and sales (Details) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Marketable securities
Investments held in trusts	$ 971.1	$ 1,309.5
Investments held in trusts - fair value	1,002.8	1,315.5
Accounts payable
Marketable securities
Unsettled investment purchases	53.0	2.3
Accounts receivable
Marketable securities
Unsettled investment sales	35.2	6.7
Interest rate cap | Derivatives not designated as hedging instruments
Marketable securities
Collateral balances held	$ 0.2	$ 0.2

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Fair value measurements - Financial instruments disclosed, but not carried at fair value (Details) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Financial instruments not carried at fair value
Debt	$ 664.8	$ 685.2
Carrying Value | Series B preference shares
Financial instruments not carried at fair value
Redeemable preference shares	205.0	223.0
2017 SEK Subordinated Notes
Financial instruments not carried at fair value
Debt	270.6	291.2
2017 SEK Subordinated Notes | Carrying Value
Financial instruments not carried at fair value
Debt	270.6	291.2
2016 SIG Senior Notes
Financial instruments not carried at fair value
Debt	394.2	394.0
2016 SIG Senior Notes | Carrying Value
Financial instruments not carried at fair value
Debt	394.2	394.0
Level 3 Inputs | Fair Value | Series B preference shares
Financial instruments not carried at fair value
Redeemable preference shares	171.4	186.4
Level 3 Inputs | 2017 SEK Subordinated Notes | Fair Value
Financial instruments not carried at fair value
Debt	268.3	294.5
Level 3 Inputs | 2016 SIG Senior Notes | Fair Value
Financial instruments not carried at fair value
Debt	$ 394.9	$ 394.5

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Summary of significant accounting policies

3 Months Ended

Mar. 31, 2020

Accounting Policies [Abstract]

Summary of significant accounting policies

Summary of significant accounting policies

Basis of presentation

The accompanying Unaudited Consolidated Financial Statements at March 31, 2020, have been prepared in accordance with generally accepted accounting principles in the United States of America ("GAAP") and the rules and regulations of the U.S. Securities and Exchange Commission ("SEC") for interim financial information. The accompanying Unaudited Consolidated Financial Statements present the consolidated results of operations, financial condition, and cash flows of the Company and its subsidiaries and those entities in which the Company has control and a majority economic interest as well as those variable interest entities ("VIEs") that meet the requirements for consolidation. All significant intercompany transactions have been eliminated in consolidation.

These Unaudited Consolidated Financial Statements do not include all disclosures normally included in annual financial statements prepared in accordance with GAAP and should be read in conjunction with the Audited Consolidated Financial Statements and the related notes for the year ended December 31, 2019. The consolidated financial information as of December 31, 2019 included herein has been derived from the Audited Consolidated Financial Statements as of December 31, 2019.

Effective January 1, 2020, the Company changed its reportable segments. The change in reportable segments had no impact on the Company’s historical consolidated financial positions, results of operations or cash flows as previously reported. Where applicable, all prior periods presented have been revised to conform to this new presentation.

The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities as of the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. In the opinion of management, the accompanying Unaudited Consolidated Financial Statements reflect all adjustments (consisting of normally recurring accruals) necessary for a fair statement of results on an interim basis. Tabular dollar amounts are in millions, with the exception of share and per share amounts. All amounts are reported in U.S. dollars, except where noted otherwise.

Recently adopted changes in accounting principles

Credit losses

Effective January 1, 2020, Sirius Group adopted Accounting Standards Update ("ASU") 2016-13, Measurement of Credit Losses on Financial Instruments (ASC 326), which establishes new guidance for the recognition of credit losses for financial assets measured at amortized cost ("current expected credit losses" or "CECL"). The guidance applies to financial assets that have the contractual right to receive cash, including reinsurance receivables and recoverables and requires reporting entities to estimate the credit losses expected over the life of a credit exposure using historical information, current information and reasonable and supportable forecasts that affect the collectability of the financial asset. The expected credit losses, and subsequent adjustments to such losses, are recorded through an allowance account that is deducted from the amortized cost basis of the financial asset, with the net carrying value of the financial asset presented on the consolidated balance sheet at the amount expected to be collected. Sirius Group adopted the new guidance using a modified retrospective transition method through a cumulative-effect adjustment to retained earnings.

As a result of the adoption of the new guidance, Sirius Group estimated a total CECL allowance of $14.9 million. The adoption of this guidance did not materially impact our results of operations or cash flows. Due to the adoption of the standard using the retrospective cumulative-effect adjustment method, the Company recorded $(6.8) million cumulative-effect adjustment net of taxes to its opening retained earnings. (See Note 7.)

Fair Value Measurement Disclosures

Effective January 1, 2020, Sirius Group adopted ASU 2018-13, Fair Value Measurement (Topic 820): Disclosure Framework—Changes to the Disclosure Requirements for Fair Value Measurement, which modifies the disclosure requirements of fair value measurements. The adoption of this guidance did not have any impact on the consolidated financial statements but expanded disclosure of the ranges and weighted averages of significant unobservable inputs used in Level 3 fair values. (See Note 9.)

Simplifying the Accounting for Income Taxes

Effective January 1, 2020, Sirius Group adopted ASU 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes, which eliminates certain exceptions, and clarifies and simplifies certain aspects of accounting for income taxes. Sirius Group has fully adopted all provisions of the guidance with consideration of the various transition methods.

Sirius Group adopted the removal of the exception to the general methodology for calculating income taxes in an interim period when a year-to-date loss exceeds the anticipated loss for the year. The removal of this exception allowed Sirius Group to record a benefit for a year-to-date loss in excess of its forecasted loss in certain jurisdictions. The removal of this exception was applied prospectively to the Income tax benefit (expense) line on the Consolidated Statements of Income.

Sirius Group adopted all other provisions in the guidance, including the requirement for an entity to recognize a franchise tax (or similar tax) that is partially based on income as an income-based tax and account for any incremental amount incurred as a non-income-based tax through a cumulative-effect adjustment to retained earnings. These provisions did not have a material impact on the Consolidated Financial Statements or were not applicable to Sirius Group.

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Earnings per share - Basic and Diluted earnings per share (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Numerator:
Net (loss) income	$ (121.3)	$ 104.1
Less: Income attributable to non-controlling interests	(0.2)	(0.4)
Less: Change in carrying value of Series B preference shares	23.4	(8.4)
Net (loss) income attributable to Sirius Group's common shareholders	(98.1)	95.3
Less: Earnings attributable to Series B preference shares	0.0	(8.9)
Net income available to Sirius Group common shareholders	(98.1)	86.4
Add: Change in carrying value of Series B preference shares	(23.4)	8.4
Net income available to Sirius Group common shareholders on a diluted basis	$ (121.5)	$ 94.8
Denominator:
Weighted average shares outstanding for basic earnings per share (in shares)	115,262,302	115,182,331
Add: Series B preference shares (in shares)	11,901,670	11,901,670
Add: Unvested performance share units and restricted share units (in shares)	0	251,313
Weighted average shares outstanding for diluted earnings per share (in shares)	127,163,972	127,335,314
Earnings per share
Basic earnings per share (in usd per share)	$ (0.85)	$ 0.75
Diluted earnings per share (in usd per share)	$ (0.96)	$ 0.74
Potentially dilutive securities excluded from the calculation of Diluted earnings per share (in shares)	15,972,398	19,510,830

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Share-based compensation - Unvested Share-based Awards Activity (Details) - shares	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Unvested, beginning of the year (in shares)	1,374,945
Granted (in shares)	0	1,374,945
Vested (in shares)	0
Forfeited (in shares)	0
Unvested, end of the year (in shares)	1,374,945
RSUs
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Unvested, beginning of the year (in shares)	1,353,852
Granted (in shares)	0	1,411,714
Vested (in shares)	0
Forfeited (in shares)	33,015
Unvested, end of the year (in shares)	1,320,837
IPO Incentive Awards | Performance share units
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Unvested, beginning of the year (in shares)	555,163
Granted (in shares)	0
Vested (in shares)	0
Forfeited (in shares)	11,967
Unvested, end of the year (in shares)	543,196
Long Term Incentive Plan 2019 | Performance share units
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Unvested, beginning of the year (in shares)	391,136
Granted (in shares)	0	401,311
Vested (in shares)	0
Forfeited (in shares)	8,809
Unvested, end of the year (in shares)	382,327
2018 Long Term Incentive Plan (LTIP)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Unvested, beginning of the year (in shares)	870,471
Granted (in shares)	0
Vested (in shares)	0
Forfeited (in shares)	14,372
Unvested, end of the year (in shares)	856,099

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Commitments and contingencies - Leases (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Leases
Operating lease expense	$ 3.0	$ 2.6
Operating lease right-of-use assets	26.1		$ 27.4
Lease liability	$ 27.8		$ 29.3
Leased offices
Leases
Weighted average lease term (years)	7 years
Leased equipment
Leases
Weighted average lease term (years)	3 years

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Consolidated Statements of Comprehensive (Loss) Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Comprehensive (loss) income
Net (loss) income	$ (121.3)	$ 104.1
Other comprehensive (loss)
Change in foreign currency translation, net of tax	(63.4)	(27.8)
Total other comprehensive (loss)	(63.4)	(27.8)
Comprehensive (loss) income	(184.7)	76.3
Income attributable to non-controlling interests	(0.2)	(0.4)
Comprehensive (loss) income attributable to Sirius Group	$ (184.9)	$ 75.9

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Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2020	Apr. 30, 2020
Document and Entity Information
Entity Registrant Name	Sirius International Insurance Group, Ltd.
Entity Central Index Key	0001744894
Document Type	10-Q
Document Period End Date	Mar. 31, 2020
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity Current Reporting Status	Yes
Entity Filer Category	Non-accelerated Filer
Entity Common Stock, Shares Outstanding		115,299,341
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q1

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Allowance for expected credit losses (Details) $ in Millions	Mar. 31, 2020 USD ($)
Ceded Credit Risk [Line Items]
Premiums receivable & Funds held by ceding companies	$ 1,224.7
Reinsurance recoverable on unpaid and paid loss	529.9
MGU Trade receivables	25.6
Total as of March 31, 2020	1,780.2
Premiums receivable & Funds held by ceding companies, allowance for credit losses	10.6
Reinsurance recoverable on unpaid and paid loss, allowance for credit losses	3.9
MGU trade receivable, allowance for credit losses	0.4
Total allowance for credit losses	$ 14.9
Percent of the total reinsurance recoverables rated by either A.M. Best or S&P	0.63
AM Best, A- Rating | Standard & Poor's, A- Rating
Ceded Credit Risk [Line Items]
Percent of the total reinsurance recoverables rated by either A.M. Best or S&P	0.76

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Segment information - Net premiums written by client location and underwriting location by reportable segment (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Net premiums written by client location and underwriting location by reportable segment
Net written premiums	$ 629.9	$ 484.8
Client location: United States
Net premiums written by client location and underwriting location by reportable segment
Net written premiums	368.3	241.5
Client location: Europe
Net premiums written by client location and underwriting location by reportable segment
Net written premiums	180.3	157.6
Client location: Canada, the Caribbean, Bermuda and Latin America
Net premiums written by client location and underwriting location by reportable segment
Net written premiums	35.9	34.0
Client location: Asia and Other
Net premiums written by client location and underwriting location by reportable segment
Net written premiums	45.4	51.7
Underwriting location: United States
Net premiums written by client location and underwriting location by reportable segment
Net written premiums	287.0	160.5
Underwriting location: Europe
Net premiums written by client location and underwriting location by reportable segment
Net written premiums	278.1	270.7
Underwriting location: Canada, the Caribbean, Bermuda and Latin America
Net premiums written by client location and underwriting location by reportable segment
Net written premiums	48.1	35.9
Underwriting location: Asia and Other
Net premiums written by client location and underwriting location by reportable segment
Net written premiums	16.7	17.7
Global Reinsurance | Reportable segments
Net premiums written by client location and underwriting location by reportable segment
Net written premiums	345.4	335.9
Global Reinsurance | Client location: United States | Reportable segments
Net premiums written by client location and underwriting location by reportable segment
Net written premiums	104.3	116.6
Global Reinsurance | Client location: Europe | Reportable segments
Net premiums written by client location and underwriting location by reportable segment
Net written premiums	172.8	149.5
Global Reinsurance | Client location: Canada, the Caribbean, Bermuda and Latin America | Reportable segments
Net premiums written by client location and underwriting location by reportable segment
Net written premiums	29.4	29.0
Global Reinsurance | Client location: Asia and Other | Reportable segments
Net premiums written by client location and underwriting location by reportable segment
Net written premiums	38.9	40.8
Global Reinsurance | Underwriting location: United States | Reportable segments
Net premiums written by client location and underwriting location by reportable segment
Net written premiums	72.6	75.7
Global Reinsurance | Underwriting location: Europe | Reportable segments
Net premiums written by client location and underwriting location by reportable segment
Net written premiums	208.2	207.0
Global Reinsurance | Underwriting location: Canada, the Caribbean, Bermuda and Latin America | Reportable segments
Net premiums written by client location and underwriting location by reportable segment
Net written premiums	48.1	35.9
Global Reinsurance | Underwriting location: Asia and Other | Reportable segments
Net premiums written by client location and underwriting location by reportable segment
Net written premiums	16.5	17.3
Global A&H | Reportable segments
Net premiums written by client location and underwriting location by reportable segment
Net written premiums	200.7	134.9
Global A&H | Client location: United States | Reportable segments
Net premiums written by client location and underwriting location by reportable segment
Net written premiums	180.7	111.1
Global A&H | Client location: Europe | Reportable segments
Net premiums written by client location and underwriting location by reportable segment
Net written premiums	7.2	8.0
Global A&H | Client location: Canada, the Caribbean, Bermuda and Latin America | Reportable segments
Net premiums written by client location and underwriting location by reportable segment
Net written premiums	6.5	5.0
Global A&H | Client location: Asia and Other | Reportable segments
Net premiums written by client location and underwriting location by reportable segment
Net written premiums	6.3	10.8
Global A&H | Underwriting location: United States | Reportable segments
Net premiums written by client location and underwriting location by reportable segment
Net written premiums	131.2	71.0
Global A&H | Underwriting location: Europe | Reportable segments
Net premiums written by client location and underwriting location by reportable segment
Net written premiums	69.5	63.6
Global A&H | Underwriting location: Canada, the Caribbean, Bermuda and Latin America | Reportable segments
Net premiums written by client location and underwriting location by reportable segment
Net written premiums	0.0	0.0
Global A&H | Underwriting location: Asia and Other | Reportable segments
Net premiums written by client location and underwriting location by reportable segment
Net written premiums	0.0	0.3
U.S. Specialty | Reportable segments
Net premiums written by client location and underwriting location by reportable segment
Net written premiums	15.2	13.6
U.S. Specialty | Client location: United States | Reportable segments
Net premiums written by client location and underwriting location by reportable segment
Net written premiums	15.2	13.6
U.S. Specialty | Client location: Europe | Reportable segments
Net premiums written by client location and underwriting location by reportable segment
Net written premiums	0.0	0.0
U.S. Specialty | Client location: Canada, the Caribbean, Bermuda and Latin America | Reportable segments
Net premiums written by client location and underwriting location by reportable segment
Net written premiums	0.0	0.0
U.S. Specialty | Client location: Asia and Other | Reportable segments
Net premiums written by client location and underwriting location by reportable segment
Net written premiums	0.0	0.0
U.S. Specialty | Underwriting location: United States | Reportable segments
Net premiums written by client location and underwriting location by reportable segment
Net written premiums	15.2	13.6
U.S. Specialty | Underwriting location: Europe | Reportable segments
Net premiums written by client location and underwriting location by reportable segment
Net written premiums	0.0	0.0
U.S. Specialty | Underwriting location: Canada, the Caribbean, Bermuda and Latin America | Reportable segments
Net premiums written by client location and underwriting location by reportable segment
Net written premiums	0.0	0.0
U.S. Specialty | Underwriting location: Asia and Other | Reportable segments
Net premiums written by client location and underwriting location by reportable segment
Net written premiums	0.0	0.0
Runoff & Other | Reportable segments
Net premiums written by client location and underwriting location by reportable segment
Net written premiums	68.6	0.4
Runoff & Other | Client location: United States | Reportable segments
Net premiums written by client location and underwriting location by reportable segment
Net written premiums	68.1	0.2
Runoff & Other | Client location: Europe | Reportable segments
Net premiums written by client location and underwriting location by reportable segment
Net written premiums	0.3	0.1
Runoff & Other | Client location: Canada, the Caribbean, Bermuda and Latin America | Reportable segments
Net premiums written by client location and underwriting location by reportable segment
Net written premiums	0.0	0.0
Runoff & Other | Client location: Asia and Other | Reportable segments
Net premiums written by client location and underwriting location by reportable segment
Net written premiums	0.2	0.1
Runoff & Other | Underwriting location: United States | Reportable segments
Net premiums written by client location and underwriting location by reportable segment
Net written premiums	68.0	0.2
Runoff & Other | Underwriting location: Europe | Reportable segments
Net premiums written by client location and underwriting location by reportable segment
Net written premiums	0.4	0.1
Runoff & Other | Underwriting location: Canada, the Caribbean, Bermuda and Latin America | Reportable segments
Net premiums written by client location and underwriting location by reportable segment
Net written premiums	0.0	0.0
Runoff & Other | Underwriting location: Asia and Other | Reportable segments
Net premiums written by client location and underwriting location by reportable segment
Net written premiums	$ 0.2	$ 0.1

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Commitments and contingencies (Tables)

3 Months Ended

Mar. 31, 2020

Commitments and Contingencies Disclosure [Abstract]

Schedule of lease balances within the Consolidated Balance Sheets

The following table presents the lease balances within the Consolidated Balance Sheets as of March 31, 2020 and December 31, 2019:

(millions)	Balance Sheet Classification	March 31, 2020		December 31, 2019
Operating lease right-of-use assets	Other assets		$26.1		$27.4
Current lease liabilities	Other liabilities		$7.6		$8.3
Non-current lease liabilities	Other liabilities		$20.2		$21.0

Schedule of weighted average remaining lease term and weighted average discount rate

The following table presents weighted average remaining lease term and weighted average discount rate as of March 31, 2020:

Weighted average lease term (years) as at March 31, 2020
Leased offices	7 years
Leased equipment	3 years
Weighted average discount rate:
Leased offices	3.6	%
Leased equipment	3.4	%

Schedule of future annual minimum rental payments required under non cancellable leases for office space

The following table presents future annual minimum rental payments required under non-cancellable leases and the present value discount to arrive at total lease liability as of March 31, 2020:

(Millions)	Future Payments
2020	$	6.5
2021	8.1
2022	7.2
2023	4.7
2024	2.3
2025 and after	1.1
Total future annual minimum rental payments as of March 31, 2020	29.9
Less: present value discount	(2.1		)
Total lease liability as of March 31, 2020	$	27.8

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Debt and standby letters of credit facilities - Revolving Credit Facility (Details) - USD ($)	1 Months Ended
	Feb. 28, 2018	Mar. 31, 2020
Line of Credit Facility [Line Items]
Outstanding amount		$ 0
Revolving Credit Facility
Line of Credit Facility [Line Items]
Debt instrument, term	3 years
Borrowing capacity	$ 300,000,000

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Derivatives - Interest rate cap (Details) - Interest rate cap $ in Millions	3 Months Ended
	Mar. 31, 2020 USD ($) financial_institution	Dec. 31, 2019 USD ($)
Derivatives
Number of financial institutions entered into derivative contracts | financial_institution	2
Derivatives not designated as hedging instruments
Derivatives
Collateral balances held | $	$ 0.2	$ 0.2

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Common shareholder's equity, mezzanine equity, and non-controlling interests

3 Months Ended

Mar. 31, 2020

Equity [Abstract]

Common shareholder's equity, mezzanine equity, and non-controlling interests

Common shareholder's equity, mezzanine equity, and non-controlling interests

Common shareholder's equity

The authorized share capital of the Company consists of 500,000,000 Common shares, $0.01 par value per share, and 100,000,000 Preference shares, $0.01 par value per share.

The following table presents changes in the Company's issued and outstanding Common shares as of March 31, 2020 and 2019, respectively:

	Three months ended March 31,
(Millions)	2020	2019
Common shares:
Shares issued and outstanding, beginning of period	115,299,341	115,151,251
Issuance of shares to directors and employees	—	111,052
Shares issued and outstanding, end of period	115,299,341	115,262,303

Dividends

The Company did not pay dividends to common shareholders during the three months ended March 31, 2020 and 2019.

Mezzanine equity

Series B Preference Shares

Sirius Group has issued 11,901,670 of the 15,000,000 designated Series B preference shares, with a par value of $0.01 per share.

The Series B preference shares rank senior to common shares with respect to dividend rights, rights of liquidation, winding-up, or dissolution of the Company and junior to all of the Company's existing and future policyholder obligations and debt obligations. Without the consent of the holders of the Series B preference shares, the Company may not issue any class or series of shares that rank senior or pari passu with the Series B preference shares as to the payment of dividends or as to distribution of assets upon any voluntary or involuntary liquidation, winding-up or dissolution of the Company, if the aggregate gross proceeds from the issuance of all such senior or pari passu shares equals or exceeds $100 million.

The Company adjusts the carrying value of the Series B preference shares to equal the redemption value at the end of each reporting period. At March 31, 2020 and December 31, 2019, the balance of the Series B preference shares was $199.6 million and $223.0 million, respectively.

Non-controlling interests

Non-controlling interests consist of the ownership interests of non-controlling shareholders in consolidated entities and are presented separately on the balance sheet. At March 31, 2020 and December 31, 2019, Sirius Group's balance sheet included $2.6 million and $2.4 million, respectively, in non-controlling interests.

The following tables show the change in non-controlling interest for the three months ended March 31, 2020 and 2019:

(Millions)	For the three months ended March 31, 2020		For the three months ended March 31, 2019
Non-controlling interests, beginning of the period	$	2.4	$	1.7
Net income attributable to non-controlling interests	0.2		0.4
Other, net	—		0.1
Non-controlling interests, end of the period	$	2.6	$	2.2

Alstead Re

As of March 31, 2020 and December 31, 2019, Sirius Group recorded non-controlling interest of $2.5 million and $2.3 million, respectively, in Alstead Re Insurance Company ("Alstead Re"). (See Note 17.)

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Transactions with related parties

3 Months Ended

Mar. 31, 2020

Related Party Transactions [Abstract]

Transactions with related parties

Transactions with related parties

(Re)insurance contracts

In the normal course of business, Sirius Group enters into insurance and reinsurance contracts with certain of its insurance and MGU affiliates, or their subsidiaries. During the three months ended March 31, 2020 and 2019, these contracts resulted in gross written premiums of $41.3 million and $24.1 million, respectively. As of March 31, 2020 and December 31, 2019, Sirius Group had total receivables due from affiliates of $31.0 million and $16.1 million, respectively. As of both March 31, 2020 and December 31, 2019, Sirius Group had total payables due to affiliates of $0.9 million.

Other

Meyer "Sandy" Frucher is the Company's Chairman of the Board of Directors and was also Vice Chairman of Nasdaq, Inc. ("Nasdaq") until December 2019. On January 1, 2020, Mr. Frucher concluded his tenure as Vice Chairman of Nasdaq and assumed the role of Strategic Advisor. The Company is traded on the Nasdaq Global Select Market and has business transactions that are related to its listing on the exchange under the normal course of business. (See Note 3.)

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Reserves for unpaid losses and loss adjustment expenses (Tables)

3 Months Ended

Mar. 31, 2020

Insurance [Abstract]

Summary of the loss and LAE reserve activities

The following table summarizes the loss and LAE reserve activities of Sirius Group for the three months ended March 31, 2020 and 2019:

	Three months ended March 31,
(Millions)	2020			2019
Gross beginning balance	$	2,331.5		$	2,016.7
Less beginning reinsurance recoverable on unpaid losses	(410.3		)	(350.2		)
Net loss and LAE reserve balance	1,921.2			1,666.5
Losses and LAE incurred relating to:
Current year losses	422.9			167.3
Prior years losses	4.2			16.6
Total net incurred losses and LAE	427.1			183.9
Foreign currency translation adjustment to net loss and LAE reserves	(21.8		)	(3.4		)
Loss and LAE paid relating to:
Current year losses	43.1			36.2
Prior years losses	208.0			183.8
Total loss and LAE payments	251.1			220.0
Net ending balance	2,075.4			1,627.0
Plus ending reinsurance recoverable on unpaid losses	444.2			349.3
Gross ending balance	$	2,519.6		$	1,976.3