10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

(Mark One)

☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended March 31, 2025

or

☐ TRANSITION REPORT PURSUANT TO SECTION 13 or 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from to

Commission File Number 001-34091

MARKETAXESS HOLDINGS INC.

(Exact name of registrant as specified in its charter)

Delaware	52-2230784
(State or other jurisdiction of incorporation or organization)	(IRS Employer Identification No.)
55 Hudson Yards, 15th Floor New York, New York	10001
(Address of principal executive offices)	(Zip Code)

Registrant’s telephone number, including area code: (212) 813-6000

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

Title of each class	Trading Symbol	Name of each exchange on which registered
Common Stock, $0.003 par value	MKTX	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 for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes ☑ No ☐

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

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

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

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

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

As of May 5, 2025, the number of shares of the Registrant’s voting common stock outstanding was 37,501,661.

2

MARKETAXESS HOLDINGS INC.

FORM 10-Q FOR THE QUARTERLY PERIOD ENDED MARCH 31, 2025

TABLE OF CONTENTS

		Page
PART I — Financial Information
Item 1.	Financial Statements (Unaudited)
	Consolidated Statements of Financial Condition as of March 31, 2025 and December 31, 2024	3
	Consolidated Statements of Operations for the Three Months Ended March 31, 2025 and 2024	4
	Consolidated Statements of Comprehensive Income for the Three Months Ended March 31, 2025 and 2024	5
	Consolidated Statements of Changes in Stockholders’ Equity for the Three Months Ended March 31, 2025 and 2024	6
	Consolidated Statements of Cash Flows for the Three Months Ended March 31, 2025 and 2024	8
	Notes to Consolidated Financial Statements	10
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	27
Item 3.	Quantitative and Qualitative Disclosures About Market Risk	41
Item 4.	Controls and Procedures	43
PART II — Other Information
Item 1.	Legal Proceedings	44
Item 1A.	Risk Factors	44
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	44
Item 3.	Defaults Upon Senior Securities	45
Item 4.	Mine Safety Disclosures	45
Item 5.	Other Information	45
Item 6.	Exhibits	46

2

PART I — Financial Information

Item 1. Financial Statements

MARKETAXESS HOLDINGS INC.

CONSOLIDATED STATEMENTS OF FINANCIAL CONDITION

(Unaudited)

	As of
	March 31, 2025			December 31, 2024
	(In thousands, except share  and per share amounts)
ASSETS
Cash and cash equivalents	$	486,224		$	544,478
Cash segregated under federal regulations		47,514			47,107
Investments, at fair value		166,113			165,260
Accounts receivable, net of allowance of $658 and $982 as of     March 31, 2025 and December 31, 2024, respectively		109,171			91,845
Receivables from broker-dealers, clearing organizations and customers		493,613			357,728
Goodwill		236,706			236,706
Intangible assets, net of accumulated amortization		94,430			98,078
Furniture, equipment, leasehold improvements and capitalized software, net of     accumulated depreciation and amortization		107,858			107,298
Operating lease right-of-use assets		56,624			58,132
Prepaid expenses and other assets		79,843			82,584
Total assets	$	1,878,096		$	1,789,216
LIABILITIES AND STOCKHOLDERS’ EQUITY
Liabilities
Accrued employee compensation		30,912			68,054
Payables to broker-dealers, clearing organizations and customers		318,866			218,845
Income and other tax liabilities		80,987			3,683
Accounts payable, accrued expenses and other liabilities		29,215			37,320
Operating lease liabilities		70,803			72,654
Total liabilities	$	530,783		$	400,556
Commitments and Contingencies (Note 13)
Stockholders’ equity
Preferred stock, $0.001 par value, 4,855,000 shares authorized, no shares issued     and outstanding as of March 31, 2025 and December 31, 2024, respectively		—			—
Series A Preferred Stock, $0.001 par value, 110,000 shares authorized, no shares     issued and outstanding as of March 31, 2025 and December 31, 2024,     respectively		—			—
Common stock voting, $0.003 par value, 110,000,000 shares authorized,     41,127,475 shares and 41,020,421 shares issued and 37,571,221 shares     and 37,646,374 shares outstanding as of March 31, 2025 and December 31, 2024,     respectively		123			123
Common stock non-voting, $0.003 par value, 10,000,000 shares authorized, no     shares issued and outstanding as of March 31, 2025 and December 31, 2024,     respectively		—			—
Additional paid-in capital		348,708			350,701
Treasury stock – Common stock voting, at cost, 3,556,254 shares     and 3,374,047 shares as of March 31, 2025 and December 31, 2024,     respectively		(370,342	)		(333,369	)
Retained earnings		1,392,279			1,405,904
Accumulated other comprehensive loss		(23,455	)		(34,699	)
Total stockholders’ equity		1,347,313			1,388,660
Total liabilities and stockholders’ equity	$	1,878,096		$	1,789,216
The accompanying notes are an integral part of these consolidated financial statements.

3

MARKETAXESS HOLDINGS INC.

CONSOLIDATED STATEMENTS OF OPERATIONS

(Unaudited)

	Three Months Ended March 31,
	2025		2024
	(In thousands, except per share amounts)
Revenues
Commissions	$	181,343	$	184,873
Information services		12,904		11,881
Post-trade services		11,088		10,730
Technology services		3,241		2,834
Total revenues		208,576		210,318
Expenses
Employee compensation and benefits		61,916		61,264
Depreciation and amortization		18,236		18,200
Technology and communications		18,048		17,051
Professional and consulting fees		6,410		6,395
Occupancy		3,622		3,425
Marketing and advertising		2,061		1,833
Clearing costs		4,185		4,911
General and administrative		5,716		4,739
Total expenses		120,194		117,818
Operating income		88,382		92,500
Other income (expense)
Interest income		7,169		5,973
Interest expense		(213)		(316)
Equity in earnings of unconsolidated affiliate		289		370
Other, net		527		(1,810)
Total other income (expense)		7,772		4,217
Income before income taxes		96,154		96,717
Provision for income taxes		81,089		24,102
Net income	$	15,065	$	72,615
Net income per common share
Basic	$	0.40	$	1.92
Diluted	$	0.40	$	1.92
Cash dividends declared per common share	$	0.76	$	0.74
Weighted average shares outstanding
Basic		37,388		37,740
Diluted		37,456		37,790
The accompanying notes are an integral part of these consolidated financial statements.

4

MARKETAXESS HOLDINGS INC.

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(Unaudited)

	Three Months Ended March 31,
	2025		2024
	(In thousands)
Net income	$	15,065	$	72,615
Cumulative translation adjustment		11,010		(4,241	)
Net unrealized gain/(loss) on securities available-for-    sale, net of tax of $(73) and 33, respectively		234		(40	)
Comprehensive income	$	26,309	$	68,334
The accompanying notes are an integral part of these consolidated financial statements.

5

6MARKETAXESS HOLDINGS INC.

CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS’ EQUITY

(Unaudited)

	Common Stock Voting		Additional Paid-In Capital		Treasury Stock - Common Stock Voting		Retained Earnings		Accumulated Other Comprehensive Loss		Total Stockholders’ Equity
	(In thousands, except per share amounts)
Balance at January 1, 2025	$	123	$	350,701	$	(333,369)	$	1,405,904	$	(34,699)	$	1,388,660
Net income		—		—		—		15,065		—		15,065
Cumulative translation adjustment		—		—		—		—		11,010		11,010
Unrealized net gain (loss) on    securities available-for-sale,    net of tax		—		—		—		—		234		234
Stock-based compensation		—		7,696		—		—		—		7,696
Withholding tax payments on    Full Value Awards vesting and    stock option exercises		—		(9,525)		—		—		—		(9,525)
Reissuance of treasury stock		—		(164)		1,104		—		—		940
Repurchases of common stock		—		—		(38,077)		—		—		(38,077)
Cash dividend on common stock    ($0.76 per share)		—		—		—		(28,690)		—		(28,690)
Balance at March 31, 2025	$	123	$	348,708	$	(370,342)	$	1,392,279	$	(23,455)	$	1,347,313
The accompanying notes are an integral part of these consolidated financial statements.

6

MARKETAXESS HOLDINGS INC.

CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS’ EQUITY (CONTINUED)

(Unaudited)

	Common Stock Voting		Additional Paid-In Capital		Treasury Stock - Common Stock Voting		Retained Earnings		Accumulated Other Comprehensive Loss		Total Stockholders’ Equity
	(In thousands, except per share amounts)
Balance at January 1, 2024	$	123	$	333,292	$	(260,298)	$	1,244,216	$	(24,370)	$	1,292,963
Net income		—		—		—		72,615		—		72,615
Cumulative translation adjustment		—		—		—		—		(4,241)		(4,241)
Unrealized net gain (loss) on    securities available-for-sale,    net of tax		—		—		—		—		(40)		(40)
Stock-based compensation		—		7,298		—		—		—		7,298
Exercise of stock options		—		1,977		—		—		—		1,977
Withholding tax payments on    Full Value Awards vesting and    stock option exercises		—		(14,893)		—		—		—		(14,893)
Reissuance of treasury stock		—		(155)		1,440		(581)		—		704
Repurchases of common stock		—		—		(10,147)		—		—		(10,147)
Cash dividend on common stock    ($0.74 per share)		—		—		—		(28,003)		—		(28,003)
Balance at March 31, 2024		123		327,519		(269,005)		1,288,247		(28,651)		1,318,233
The accompanying notes are an integral part of these consolidated financial statements.

7

MARKETAXESS HOLDINGS INC.

CONSOLIDATED STATEMENTS OF CASH FLOWS

(Unaudited)

	Three Months Ended March 31,
	2025			2024
	(In thousands)
Cash flows from operating activities
Net income	$	15,065		$	72,615
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization		18,236			18,200
Amortization of operating lease right-of-use assets		1,763			1,599
Stock-based compensation expense		7,333			7,103
Deferred taxes		(124	)		(1,338	)
Foreign currency transaction losses		1,691			187
Other		(4,809	)		1,730
Changes in operating assets and liabilities:
(Increase) in accounts receivable		(16,414	)		(10,491	)
(Increase)/decrease in receivables from broker-dealers, clearing organizations and customers		(129,508	)		21,735
Decrease/(increase) in prepaid expenses and other assets		5,570			(1,323	)
Decrease in trading investments		—			255
Decrease/(increase) in mutual funds held in rabbi trust		837			(529	)
(Decrease) in accrued employee compensation		(34,310	)		(29,017	)
Increase/(decrease) in payables to broker-dealers, clearing organizations and customers		96,275			(71,135	)
Increase/(decrease) in income and other tax liabilities		77,295			(4,001	)
(Decrease) in accounts payable, accrued expenses and other liabilities		(7,146	)		(8,385	)
(Decrease) in operating lease liabilities		(2,125	)		(2,154	)
Net cash provided by/(used in) operating activities		29,629			(4,949	)
Cash flows from investing activities
Available-for-sale investments
Proceeds from maturities and sales		5,271			4,302
Purchases		(5,458	)		(4,972	)
Purchases of furniture, equipment and leasehold improvements		(1,930	)		(1,197	)
Capitalization of software development costs		(15,031	)		(13,963	)
Net cash (used in) investing activities		(17,148	)		(15,830	)
Cash flows from financing activities
Cash dividends on common stock		(29,464	)		(29,480	)
Exercise of stock options		—			1,977
Withholding tax payments on Full Value Awards vesting and stock option exercises		(9,525	)		(14,893	)
Repurchases of common stock		(38,077	)		(10,147	)
Net cash (used in) financing activities		(77,066	)		(52,543	)
Effect of exchange rate changes on cash and cash equivalents		8,580			(3,186	)
Cash and cash equivalents including restricted cash
Net decrease for the period		(56,005	)		(76,508	)
Beginning of period		700,459			611,672
End of period	$	644,454		$	535,164
The accompanying notes are an integral part of these consolidated financial statements.

8

MARKETAXESS HOLDINGS INC.

CONSOLIDATED STATEMENTS OF CASH FLOWS (CONTINUED)

(Unaudited)

	Three Months Ended March 31,
	2025			2024
	(In thousands)
Supplemental cash flow information
Cash paid/(refunded) for income taxes	$	(1,874	)	$	37,187
Cash paid for interest		198			431
Non-cash investing and financing activity
Operating lease right-of-use assets obtained in exchange for operating lease liabilities		92			630
Furniture, equipment, software and leasehold improvement additions    included in accounts payable		501			4,825
Stock-based and accrued incentive compensation relating to capitalized    software development costs		1,754			921
Exercise of stock options - cashless		—			1,735
The accompanying notes are an integral part of these consolidated financial statements.

9

MARKETAXESS HOLDINGS INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

1. Organization and Principal Business Activity

MarketAxess Holdings Inc. (the “Company” or “MarketAxess”) was incorporated in the State of Delaware on April 11, 2000. Through its subsidiaries, MarketAxess operates leading electronic trading platforms delivering expanded liquidity opportunities, improved execution quality and significant cost savings across global fixed-income markets. Approximately 2,100 institutional investor and broker-dealer firms use MarketAxess’ patented trading technology to access global liquidity on its platforms in U.S. high-grade bonds, U.S. high-yield bonds, emerging market debt, eurobonds, municipal bonds, U.S. government bonds and other fixed-income securities. MarketAxess offers a diverse set of trading protocols, automated and algorithmic trading solutions, intelligent data products and a range of post-trade and technology services to provide an end-to-end trading solution to its network of platform participants. Through its Open Trading® protocols, MarketAxess executes bond trades between and among institutional investor and broker-dealer clients in the leading all-to-all anonymous trading environment for corporate bonds.

2. Significant Accounting Policies

Basis of Presentation

The consolidated financial statements include the accounts of the Company and its subsidiaries. All intercompany transactions and balances have been eliminated. These consolidated financial statements are unaudited and should be read in conjunction with the audited consolidated financial statements included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2024. The consolidated financial information as of December 31, 2024 has been derived from audited financial statements not included herein. These unaudited consolidated financial statements are prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) and the rules and regulations of the U.S. Securities and Exchange Commission (“SEC”) with respect to Form 10-Q and reflect all adjustments that, in the opinion of management, are normal and recurring, and that are necessary for a fair statement of the results for the interim periods presented. In accordance with such rules and regulations, certain disclosures that are normally included in annual financial statements have been omitted. Interim period operating results may not be indicative of the operating results for a full year.

Cash and Cash Equivalents

The Company defines cash equivalents as short-term interest-bearing investments with maturities at the time of purchase of three months or less.

Investments

The Company determines the appropriate classification of securities at the time of purchase which are recorded in the Consolidated Statements of Financial Condition on the trade date. Securities are classified as available-for-sale or trading. Available-for-sale investments are carried at fair value with unrealized gains or losses reported in accumulated other comprehensive loss in the Consolidated Statements of Financial Condition and realized gains or losses reported in other, net in the Consolidated Statements of Operations. Trading investments include U.S. Treasuries and are carried at fair value, with realized and unrealized gains or losses included in other, net in the Consolidated Statements of Operations.

The Company assesses whether an impairment loss on its available-for-sale debt securities has occurred due to declines in fair value or other market conditions. When the amortized cost basis of an available-for-sale debt security exceeds its fair value, the security is deemed to be impaired. The portion of an impairment related to credit losses is determined by comparing the present value of cash flows expected to be collected from the security with the amortized cost basis of the security and is recorded as a charge in the Consolidated Statements of Operations. The remainder of an impairment is recognized in accumulated other comprehensive loss if the Company does not intend to sell the security and it is more likely than not that the Company will not be required to sell the security prior to recovery.

10

MARKETAXESS HOLDINGS INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

(Unaudited)

Fair Value Financial Instruments

Fair value is defined as “the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date.” A three-tiered hierarchy for determining fair value has been established that prioritizes inputs to valuation techniques used in fair value calculations. The three levels of inputs are defined as Level 1 (unadjusted quoted prices for identical assets or liabilities in active markets), Level 2 (inputs that are observable in the marketplace other than those inputs classified in Level 1) and Level 3 (inputs that are unobservable in the marketplace). The Company’s financial assets and liabilities measured at fair value on a recurring basis consist of its money market funds, trading securities, available-for-sale securities and foreign currency forward contracts. All other financial instruments are short-term in nature and the carrying amounts reported on the Consolidated Statements of Financial Condition approximate fair value.

Receivables from and Payables to Broker-dealers, Clearing Organizations and Customers

Receivables from broker-dealers, clearing organizations and customers include amounts receivable for securities not delivered by the Company to the purchaser by the settlement date (“securities failed-to-deliver”) and cash deposits held at clearing organizations and clearing brokers to facilitate the settlement and clearance of matched principal transactions. Payables to broker-dealers, clearing organizations and customers include amounts payable for securities not received by the Company from a seller by the settlement date (“securities failed-to-receive”). Securities failed-to-deliver and securities failed-to-receive for transactions executed on a matched principal basis where the Company serves as a counterparty to both the buyer and the seller are recorded on a settlement date basis. The Company presents its securities failed-to-deliver and securities failed-to-receive balances on a net-by-counterparty basis within receivables from and payables to broker-dealers, clearing organizations and customers. The difference between the Company’s trade-date receivables and payables for unsettled matched principal transactions reflects commissions earned and is recorded within accounts receivable, net on a trade date basis.

Allowance for Credit Losses

All accounts receivable have contractual maturities of less than one year and are derived from trading-related fees and commissions and revenues from products and services. The Company continually monitors collections and payments from its customers and maintains an allowance for doubtful accounts. The allowance for credit losses is based on the estimated expected credit losses in accounts receivable, as determined from a review of aging schedules, past due balances, historical collection experience and other specific collection issues that have been identified. Account balances are grouped for evaluation based on various risk characteristics, including billing type, legal entity, and geographic region. Additions to the allowance for credit losses are charged to bad debt expense, which is included in general and administrative expense in the Company’s Consolidated Statements of Operations. Balances that are determined to be uncollectable are written off against the allowance for credit losses.

The allowance for credit losses was $0.7 million and $1.0 million as of March 31, 2025 and December 31, 2024, respectively. The provision for bad debts was $0.2 million and $0.1 million for the three months ended March 31, 2025 and 2024, respectively. Write-offs and other charges against the allowance for credit losses were $0.3 million for the three months ended March 31, 2025 and immaterial for the three months ended March 31, 2024.

Depreciation and Amortization

Fixed assets are carried at cost less accumulated depreciation. The Company uses the straight-line method of depreciation over three to seven years. The Company amortizes leasehold improvements on a straight-line basis over the lesser of the life of the improvement or the remaining term of the lease.

Software Development Costs

The Company capitalizes certain costs associated with the development of internal use software, including, among other items, employee compensation and related benefits and third-party consulting costs at the point at which the conceptual formulation, design and testing of possible software project alternatives have been completed. Once the product is ready for its intended use, such costs are amortized on a straight-line basis over three to five years. The Company reviews the amounts capitalized for impairment whenever events or changes in circumstances indicate that the carrying amounts of the assets may not be recoverable.

11

MARKETAXESS HOLDINGS INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

(Unaudited)

Foreign Currency Translation and Forward Contracts

Assets and liabilities denominated in foreign currencies are translated using exchange rates at the end of the period; revenues and expenses are translated at average monthly rates. Gains and losses on foreign currency translation are a component of accumulated other comprehensive loss in the Consolidated Statements of Financial Condition. Transaction gains and losses are recorded in other, net in the Consolidated Statements of Operations.

The Company enters into foreign currency forward contracts to economically hedge its foreign currency transaction gains and losses. Realized and unrealized gains and losses on these forward contracts are included in other, net in the Consolidated Statements of Operations. The Company records the fair value of the forward contract asset in prepaid expenses and other assets or the fair value of the forward contract liability in accounts payable, accrued expenses and other liabilities in the Consolidated Statements of Financial Condition.

Revenue Recognition

The Company’s classification of revenues in the Consolidated Statements of Operations represents revenues from contracts with customers disaggregated by type of revenue. The Company has four revenue streams as described below.

Commission Revenue – The Company charges its broker-dealer clients variable transaction fees for trades executed on its platforms and, under certain plans, distribution fees or monthly minimum fees to use the platforms for a particular product area. Variable transaction fees are recognized on a trade date basis, are generally calculated as a percentage of the notional dollar volume of bonds traded on the platforms and vary based on the type, size, yield and maturity of the bond traded, as well as individual client incentives. Bonds that are more actively traded or that have shorter maturities generally generate lower commissions, while bonds that are less actively traded or that have longer maturities generally command higher commissions. Under the Company’s disclosed trading transaction fee plans, variable transaction fees, distribution fees and unused monthly fee commitments are invoiced and recorded on a monthly basis.

For Open Trading trades that the Company executes between and among institutional investor and broker-dealer clients on a matched principal basis by serving as counterparty to both the buyer and the seller, the Company earns its commission through the difference in price between the two trades. The commission is collected upon settlement of the trade, which typically occurs within one to two trading days after the trade date. For the majority of the Company’s U.S. Treasury matched principal trades, commissions are invoiced and recorded on a monthly basis.

Following its acquisition of Pragma LLC and Pragma Financial Systems LLC (collectively, “Pragma”) in the fourth quarter of 2023, the Company also earns other commissions on equities and foreign exchange products for algorithmic trading services. These fees incorporate variable transaction fees, which are calculated as a percentage of the notional dollar volume traded and are billed on a monthly basis.

The following table presents commission revenue by fee type:

	Three Months Ended March 31,
	2025		2024
	(In thousands)
Commission revenue by fee type
Variable transaction fees
Disclosed trading	$	95,455	$	94,778
Open Trading – matched principal trading		43,052		48,180
U.S. government bonds - matched principal trading		4,529		3,712
Other		4,955		4,849
Total variable transaction fees		147,991		151,519
Distribution fees and unused minimum fees		33,352		33,354
Total commissions	$	181,343	$	184,873

12

MARKETAXESS HOLDINGS INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

(Unaudited)

Information services – Information services includes data licensed to the Company’s broker-dealer clients, institutional investor clients and data-only subscribers; professional and consulting services; technology software licenses; and maintenance and support services. The nature and timing of each performance obligation may vary as these contracts are either subscription-based services transferred over time, and may be net of volume-based discounts, or one-time services that are transferred at a point in time. Revenues for services transferred over time are recognized ratably over the contract period as the Company’s performance obligation is met, whereas revenues for services transferred at a point in time are recognized in the period the services are provided. Customers are generally billed monthly, quarterly, or annually; revenues billed in advance are deferred and recognized ratably over the contract period. The following table presents information services revenue by timing of recognition:

	Three Months Ended March 31,
	2025		2024
	(In thousands)
Information services revenue by timing    of recognition
Services transferred over time	$	12,699	$	11,874
Services transferred at a point in time		205		7
Total information services revenues	$	12,904	$	11,881

Post-trade services – Post-trade services revenue is generated from regulatory transaction reporting, trade publication and post-trade matching services. Customers are generally billed monthly in arrears, and revenue is recognized in the period transactions are processed. Revenues billed in advance are deferred and recognized ratably over the contract period. The Company also generates one-time implementation fees for onboarding clients, which are invoiced and recognized in the period the implementation is completed. The following table presents post-trade services revenue by timing of recognition:

	Three Months Ended March 31,
	2025		2024
	(In thousands)
Post-trade services revenue by timing    of recognition
Services transferred over time	$	11,049	$	10,540
Services transferred at a point in time		39		190
Total post-trade services revenues	$	11,088	$	10,730

Technology services – Technology services revenue primarily includes technology services revenue generated by Pragma and revenue from telecommunications line charges to broker-dealer clients. Customers may be billed monthly or quarterly in arrears or in advance, and revenue is recognized in the period transactions are processed. Revenues billed in advance are deferred and recognized ratably over the contract period.

The following table presents technology services revenue by timing of recognition:

	Three Months Ended March 31,
	2025		2024
	(In thousands)
Technology services revenue by timing    of recognition
Services transferred over time	$	3,062	$	2,830
Services transferred at a point in time		179		4
Total technology services revenues	$	3,241	$	2,834

13

MARKETAXESS HOLDINGS INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

(Unaudited)

Contract liabilities consist of deferred revenues that the Company records when cash payments are received or due in advance of services to be performed. Deferred revenues are included in accounts payable, accrued expenses and other liabilities on the Consolidated Statements of Financial Condition. The revenue recognized from contract liabilities and the remaining balance is shown below:

	December 31, 2024			Payments received in advance of services to be performed		Revenue recognized for services performed during the period			Foreign Currency Translation		March 31, 2025
		(In thousands)
Information services	$		3,302	$	3,043	$	(3,713	)	$	—	$	2,632
Post-trade services			1,286		6,877		(6,251	)		39		1,951
Technology services			415		1,933		(1,980	)		—		368
Total deferred revenue	$		5,003	$	11,853	$	(11,944	)	$	39	$	4,951

The majority of the Company’s information services and post-trade services contracts are short-term in nature with durations of one year or less. For contracts with original durations extending beyond one year, the aggregate amount of the transaction price allocated to remaining performance obligations was $46.0 million as of March 31, 2025. The Company expects to recognize revenue associated with the remaining performance obligations over the next 43 months.

Stock-Based Compensation

The Company measures and recognizes compensation expense for all share-based payment awards based on their estimated fair values measured as of the grant date. These costs are recognized as an expense in the Consolidated Statements of Operations over the requisite service period, which is typically the vesting period, with an offsetting increase to additional paid-in capital. Forfeitures are recognized as they occur.

Income Taxes

Income taxes are accounted for using the asset and liability method. Deferred income taxes reflect the net tax effects of temporary differences between the financial reporting and tax bases of assets and liabilities and are measured using the enacted tax rates and laws that will be in effect when such differences are expected to reverse. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date. A valuation allowance is recognized against deferred tax assets if it is more likely than not that such assets will not be realized in future years. Tax benefits for uncertain tax positions are recognized when it is more likely than not that the positions will be sustained upon examination based on their technical merits. The Company recognizes interest and penalties related to unrecognized tax benefits in the provision for income taxes in the Consolidated Statements of Operations. All tax effects related to share-based payments are recorded in the provision for income taxes in the periods during which the awards are exercised or vest.

Business Combinations, Goodwill and Intangible Assets

Business combinations are accounted for under the purchase method of accounting. The total cost of an acquisition is allocated to the underlying net assets based on their respective estimated fair values. The excess of the purchase price over the estimated fair values of the net assets acquired is recorded as goodwill. Determining the fair value of certain assets acquired and liabilities assumed requires judgment and often involves the use of significant estimates and assumptions, including assumptions with respect to future cash flows, discount rates, revenue growth rates, customer attrition rates, royalty rates, obsolescence and asset lives. Intangible assets are valued using various methodologies, including the relief-from-royalty method and multi-period excess earnings method.

The Company operates as a single reporting unit. Following an acquisition, goodwill no longer retains its identification with a particular acquisition, but instead becomes identifiable with the entire reporting unit. As a result, all of the fair value of the Company is available to support the value of goodwill. An impairment review of goodwill is performed on an annual basis, at year-end, or more frequently if circumstances change. Intangible assets with definite lives, including purchased technologies, customer relationships and other intangible assets, are amortized over their estimated useful lives which range from one to 15 years using either a straight-line or accelerated amortization method based on the pattern of economic benefit the Company expects to realize from such assets. Intangible assets are assessed for impairment when events or circumstances indicate the existence of a possible impairment.

14

MARKETAXESS HOLDINGS INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

(Unaudited)

Equity Investments and Consolidation

The Company evaluates equity investments for potential consolidation under the voting-interest or variable-interest models. The Company consolidates investees over which the Company determines it has control under the voting interest model, generally greater than 50% ownership, or for which the Company is the primary beneficiary under the variable-interest model. The Company uses the equity method of accounting when it exercises significant influence over the investee, but does not have operating control, generally between 20% and 50% ownership. Under the equity method of accounting, original investments are recorded at cost in prepaid expenses and other assets on the Consolidated Statements of Financial Condition and adjusted by the Company’s proportionate share of the investees’ undistributed earnings or losses. Equity investments are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of the investment may not be recoverable.

Earnings Per Share

Basic earnings per share is computed by dividing the net income attributable to common stock by the weighted-average number of shares of common stock outstanding during the period. For purposes of computing diluted earnings per share, the weighted-average shares outstanding of common stock reflects the dilutive effect that could occur if convertible securities or other contracts to issue common stock were converted into or exercised for common stock.

Use of Estimates

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 at 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.

Recent Accounting Pronouncements

In December 2023, the Financial Accounting Standards Board (the “FASB”) issued Accounting Standards Update (“ASU”) 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures. The ASU requires disaggregated information about a reporting entity’s effective tax rate reconciliation and income taxes paid. The ASU is effective for the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2025. The guidance may be applied on a prospective or retrospective basis and early adoption is permitted. Adoption of this ASU will result in additional disclosures, but will not have an impact on the Company’s consolidated statements of financial condition, operations and cash flows.

In November 2024, the FASB issued ASU 2024-03, Disaggregation of Income Statement Expenses. The ASU primarily will require enhanced disclosures about certain types of expenses. The amendments in ASU 2024-03 are effective for fiscal years beginning after December 15, 2026 and interim periods within fiscal years beginning after December 15, 2027, and may be applied either on a prospective or retrospective basis. The Company is currently evaluating the impact of the standard on its disclosures.

3. Regulatory Capital Requirements

Certain of the Company’s U.S. subsidiaries are registered as broker-dealers and are subject to the applicable rules and regulations of the SEC, the Financial Industry Regulatory Authority (“FINRA”) and the Commodity Futures Trading Commission (“CFTC”). These rules contain minimum net capital requirements, as defined in the applicable regulations. Certain of the Company’s foreign subsidiaries are regulated by the Financial Conduct Authority (“FCA”) in the United Kingdom (“U.K.”) or other foreign regulators and must maintain financial resources, as defined in the applicable regulations, in excess of the applicable financial resources requirement. As of March 31, 2025, each of the Company’s subsidiaries that are subject to these regulations had net capital or financial resources in excess of their minimum requirements. As of March 31, 2025, the Company’s subsidiaries maintained aggregate net capital and financial resources that were $552.1 million in excess of the required levels of $36.6 million.

One of the Company’s U.S. broker-dealer subsidiaries is required to segregate funds in a special reserve bank account for the benefit of customers pursuant to Rule 15c3-3 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”). As of March 31, 2025, this U.S. broker-dealer subsidiary had a balance of $47.5 million in its special reserve bank account. This U.S. broker-dealer subsidiary also maintained net capital that was $285.5 million in excess of the required level of $4.0 million.

Each of the Company’s U.S. and foreign regulated subsidiaries are subject to local regulations which generally limit, or require the prior notification to or approval from such regulated entity’s principal regulator before, the repayment of borrowings from the Company or affiliates, paying cash dividends, making loans to the Company or affiliates or otherwise entering into transactions that result in a significant reduction in regulatory net capital or financial resources.

15

MARKETAXESS HOLDINGS INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

(Unaudited)

4. Fair Value Measurements

The following table summarizes the valuation of the Company’s assets and liabilities measured at fair value as categorized based on the hierarchy described in Note 2:

	Level 1		Level 2		Level 3		Total
	(In thousands)
As of March 31, 2025
Assets
Money market funds	$	77,532	$	—	$	—	$	77,532
Securities available-for-sale
Corporate debt		—		55,677		—		55,677
Trading securities
U.S. Treasuries		—		100,167		—		100,167
Mutual funds held in rabbi trust		—		10,269		—		10,269
Foreign currency forward position		—		2,619		—		2,619
Total assets	$	77,532	$	168,732	$	—	$	246,264
As of December 31, 2024
Assets
Money market funds	$	55,473	$	—	$	—	$	55,473
Securities available-for-sale
Corporate debt		—		55,108		—		55,108
Trading securities
U.S. Treasuries		—		99,045		—		99,045
Mutual funds held in rabbi trust		—		11,107		—		11,107
Total assets	$	55,473	$	165,260	$	—	$	220,733
Liabilities
Foreign currency forward position		—		936		—		936
Total liabilities	$	—	$	936	$	—	$	936

Money market funds are included in cash and cash equivalents on the Consolidated Statements of Financial Condition. Securities available-for-sale and trading securities are included in investments, at fair value on the Consolidated Statements of Financial Condition. Securities classified within Level 2 were valued using a market approach utilizing prices and other relevant information generated by market transactions involving comparable assets. The foreign currency forward contracts are included in either other assets or accounts payable, accrued expenses and other liabilities on the Consolidated Statements of Financial Condition, and are classified within Level 2 as the valuation inputs are based on quoted market prices. The mutual funds held in a rabbi trust represent investments associated with the Company’s deferred cash incentive plan.

During each of the three months ended March 31, 2025 and 2024, there were no transfers of securities between Level 1, Level 2 and Level 3.

16

MARKETAXESS HOLDINGS INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

(Unaudited)

The table below presents the carrying value, fair value and fair value hierarchy category of the Company’s financial assets and liabilities that are not measured at fair value on the Consolidated Statements of Financial Condition. The carrying values of the Company’s financial assets and liabilities not measured at fair value categorized in the fair value hierarchy as Level 1 and Level 2 approximate fair value due to the short-term nature of the underlying assets and liabilities.

	Carrying Value		Fair Value		Level 1		Level 2		Level 3		Total
	(In thousands)
As of March 31, 2025
Financial assets not measured at fair value:
Cash	$	408,692	$	408,692	$	408,692	$	—	$	—	$	408,692
Cash segregated under federal regulations		47,514		47,514		47,514		—		—		47,514
Accounts receivable, net of allowance		109,171		109,171		—		109,171		—		109,171
Receivables from broker-dealers, clearing    organizations and customers		493,613		493,613		110,544		383,069		—		493,613
Total	$	1,058,990	$	1,058,990	$	566,750	$	492,240	$	—	$	1,058,990
Financial liabilities not measured at fair value:
Payables to broker-dealers, clearing    organizations and customers	$	318,866	$	318,866	$	—	$	318,866	$	—	$	318,866
As of December 31, 2024
Financial assets not measured at fair value:
Cash	$	489,005	$	489,005	$	489,005	$	—	$	—	$	489,005
Cash segregated under federal regulations		47,107		47,107		47,107		—		—		47,107
Accounts receivable, net of allowance		91,845		91,845		—		91,845		—		91,845
Receivables from broker-dealers, clearing    organizations and customers		357,728		357,728		107,652		250,076		—		357,728
Total	$	985,685	$	985,685	$	643,764	$	341,921	$	—	$	985,685
Financial liabilities not measured at fair value:
Payables to broker-dealers, clearing    organizations and customers	$	218,845	$	218,845	$	—	$	218,845	$	—	$	218,845

17

MARKETAXESS HOLDINGS INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

(Unaudited)

The Company enters into foreign currency forward contracts as an economic hedge against certain foreign currency transaction gains and losses in the Consolidated Statements of Operations. These forward contracts are for three-month periods and are used to limit exposure to foreign currency exchange rate fluctuations. The Company records the fair value of the asset in prepaid expenses and other assets or the fair value of the liability in accounts payable, accrued expenses and other liabilities in the Consolidated Statements of Financial Condition. The following table summarizes the Company’s foreign currency forward position:

Realized and unrealized gains and losses on foreign currency forward contracts are included in other, net in the Consolidated Statements of Operations. The following table summarizes the realized and unrealized gains and losses on foreign currency forward contracts:

	As of
	March 31, 2025		December 31, 2024
	(In thousands)
Notional value	$	61,958	$	64,454
Fair value of notional		64,577		63,518
Fair value of the asset/(liability)	$	2,619	$	(936	)

	Three Months Ended March 31,
	2025			2024
	(In thousands)
Unrealized gain/(loss)	$	3,556		$	(2,098	)
Realized gain/(loss)		(1,693	)		1,323
Total gain/(loss)	$	1,863		$	(775	)

The Company records cash collateral deposits with its counterparty bank in prepaid expenses and other assets on the Consolidated Statements of Financial Condition. As of March 31, 2025, the Company did not maintain a cash collateral deposit with its counterparty bank.

The following table summarizes the Company’s investments:

	Amortized cost			Gross unrealized gains		Gross unrealized losses			Fair value
		(In thousands)
As of March 31, 2025
Securities available-for-sale
Corporate debt	$		55,708	$	165	$	(196	)	$	55,677
Trading securities
U.S. Treasuries			100,468		131		(432	)		100,167
Mutual funds held in rabbi trust			9,867		488		(86	)		10,269
Total investments	$		166,043	$	784	$	(714	)	$	166,113
As of December 31, 2024
Securities available-for-sale
Corporate debt	$		55,447	$	88	$	(427	)	$	55,108
Trading securities
U.S. Treasuries			100,484		86		(1,525	)		99,045
Mutual funds held in rabbi trust			10,212		900		(5	)		11,107
Total investments	$		166,143	$	1,074	$	(1,957	)	$	165,260

Purchases of investments during the three months ended March 31, 2025 and 2024 were $5.5 million and $5.0 million, respectively. Proceeds from the sales and maturities of investments during the three months ended March 31, 2025 and 2024 were $5.3 million and $4.3 million, respectively.

18

MARKETAXESS HOLDINGS INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

(Unaudited)

The following table summarizes the Company’s unrealized and realized gains and losses on investments:

	Three Months Ended March 31,
	2025			2024
	(In thousands)
Unrealized gains/(losses)
Securities available-for-sale
Corporate debt	$	307		$	(73	)
Trading securities
U.S. Treasuries		1,066			(255	)
Mutual funds held in rabbi trust		(493	)		674
Total investments	$	880		$	346
Realized gains/(losses)
Securities available-for-sale
Corporate debt	$	—		$	2
Trading securities
Mutual funds held in rabbi trust		47			35
Total investments	$	47		$	37

Unrealized gains and losses on securities available-for-sale are included in accumulated other comprehensive loss on the Consolidated Statements of Financial Condition. Realized gains and losses on securities available-for-sale and realized and unrealized gains and losses on trading securities are included in other, net on the Consolidated Statements of Operations.

The following table summarizes the fair value of the Company’s corporate debt and U.S. Treasury investments based upon the contractual maturities:

	Less than one year		Due in 1 - 5 years		Total
	(In thousands)
As of March 31, 2025
Securities available-for-sale
Corporate debt	$	8,536	$	47,141	$	55,677
Trading securities
U.S. Treasuries		50,051		50,116		100,167
Total	$	58,587	$	97,257	$	155,844
As of December 31, 2024
Securities available-for-sale
Corporate debt	$	9,346	$	45,762	$	55,108
Trading securities
U.S. Treasuries		49,978		49,067		99,045
Total	$	59,324	$	94,829	$	154,153

19

MARKETAXESS HOLDINGS INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

(Unaudited)

The following table provides fair values and unrealized losses on the Company’s available-for-sale investments and the aging of securities’ continuous unrealized loss positions:

	Less than Twelve Months					Twelve Months or More					Total
	Fair value		Gross unrealized losses			Fair value		Gross unrealized losses			Fair value		Gross unrealized losses
	(In thousands)
As of March 31, 2025
Corporate debt	$	30,855	$	(196	)	$	230	$	—		$	31,085	$	(196	)
As of December 31, 2024
Corporate debt	$	38,041	$	(426	)	$	1,226	$	(1	)	$	39,267	$	(427	)

During each of the three months ended March 31, 2025 and 2024, the Company did not recognize any credit losses on its available-for-sale securities. The unrealized losses on securities are due to changes in interest rates and market liquidity.

5. Receivables from and Payables to Broker-dealers, Clearing Organizations and Customers

Receivables from and payables to broker-dealers, clearing organizations and customers consisted of the following:

	As of
	March 31, 2025		December 31, 2024
Receivables from broker-dealers, clearing organizations and customers:	(In thousands)
Securities failed-to-deliver – broker-dealers and clearing organizations	$	136,018	$	109,307
Securities failed-to-deliver – customers		242,028		136,424
Cash deposits with clearing organizations and broker-dealers		110,544		107,652
Other		5,023		4,345
Total	$	493,613	$	357,728
Payables to broker-dealers, clearing organizations and customers:
Securities failed-to-receive – broker-dealers and clearing organizations	$	214,810	$	158,694
Securities failed-to-receive – customers		93,716		51,916
Other		10,340		8,235
Total	$	318,866	$	218,845

20

MARKETAXESS HOLDINGS INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

(Unaudited)

6. Acquisitions and Equity Investments

RFQ Hub LLC Equity Investment

In May 2022, the Company invested $34.4 million to acquire a minority ownership stake in RFQ–hub Holdings LLC, an entity formed with a consortium of market participants to support the growth of RFQ-hub, a multi-asset request for quote platform. The Company possesses significant influence over RFQ–hub Holdings LLC and is accounting for its investment under the equity method of accounting. As of March 31, 2025, the Company’s investment is recorded at carrying value of $34.7 million within prepaid expenses and other assets on the Consolidated Statements of Financial Condition. The Company’s proportionate share of RFQ–hub Holdings LLC’s net earnings is recorded within equity in earnings of unconsolidated affiliate on the Consolidated Statements of Operations and was $0.3 million and $0.4 million for the three months ended March 31, 2025 and 2024, respectively.

Under a services agreement, the Company charges its equity method investee for certain reimbursable support costs incurred by the Company, including personnel compensation, and certain operational overhead costs. The amounts billed for the three months ended March 31, 2025 and 2024 were $0.6 million and $0.5 million, respectively, and are included within other, net on the Consolidated Statements of Operations. The receivable from the equity method investee was $0.6 million as of March 31, 2025 and is included within accounts receivable, net on the Consolidated Statements of Financial Condition.

On April 19, 2024, the Company entered into an agreement to acquire a controlling interest in RFQ–hub Holdings LLC for approximately $37.9 million of cash consideration. The acquisition is subject to various closing conditions, including the receipt of certain regulatory approvals. Upon the closing of the acquisition, the Company will hold approximately a 90.0% controlling stake in RFQ-hub Holdings LLC.

7. Goodwill and Intangible Assets

Goodwill and intangible assets with indefinite lives were $236.7 million as of each of March 31, 2025 and December 31, 2024. Intangible assets that are subject to amortization, including the related accumulated amortization, are comprised of the following:

	March 31, 2025							December 31, 2024
	Cost		Accumulated amortization			Net carrying amount		Cost		Accumulated amortization			Net carrying amount
	(In thousands)
Customer relationships	$	139,551	$	(68,612	)	$	70,939	$	138,089	$	(64,698	)	$	73,391
Technology and other intangibles		41,130		(17,639	)	$	23,491		41,130		(16,443	)	$	24,687
Total	$	180,681	$	(86,251	)	$	94,430	$	179,219	$	(81,141	)	$	98,078

Amortization expense associated with identifiable intangible assets was $4.4 million and $5.0 million for the three months ended March 31, 2025 and 2024, respectively. Annual estimated total amortization expense is $16.9 million, $15.2 million, $13.8 million, $12.3 million and $11.3 million for the years ended December 31, 2025 through 2029, respectively.

21

MARKETAXESS HOLDINGS INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

(Unaudited)

8. Income Taxes

The Company’s provision for income taxes includes U.S. federal, state and local, and foreign taxes. The provision for income taxes was $81.1 million and $24.1 million for the three months ended March 31, 2025 and 2024, respectively. The Company’s effective tax rate was 84.3% and 24.9% for the three months ended March 31, 2025 and 2024, respectively. The Company’s effective tax rate can vary from period to period depending on the geographic mix of our earnings, changes in tax legislation and tax rates, changes in unrecognized tax benefits and the amount and timing of excess tax benefits related to stock-based payments, among other factors.

During the first quarter of 2025, a New York state tax court issued a decision in a matter that impacted the Company’s assessment of its uncertain tax positions. The Company was not a party to that case, but its historical tax filing position was not supported by the court’s decision. This decision reversed a lower administrative court’s ruling that had been supportive of the Company’s filing position. The provision for income taxes for the three months ended March 31, 2025 includes provisions for unrecognized tax benefits of $54.9 million and $1.4 million related to the Company’s uncertain tax positions from prior periods and the current period, respectively. As of March 31, 2025, the Company’s liability for unrecognized tax benefits was $56.4 million.

The Company or one of its subsidiaries files U.S. federal, state and foreign income tax returns. The Company is currently under a New York State income tax examination for tax years 2015 through 2020 and a New York City income tax examination for the tax years 2016 through 2018. At this time, the Company cannot estimate when the examinations will conclude or the impact such examinations will have on the Company’s Consolidated Financial Statements, if any. Generally, other than the New York City and New York State audits, the Company is no longer subject to tax examinations by tax authorities for years prior to 2020.

9. Stock-Based Compensation Plans

Equity Incentive Plan

The Company maintains the MarketAxess Holdings Inc. 2020 Equity Incentive Plan (the “2020 Plan”), which provides for the grant of restricted stock, restricted stock units, performance shares, performance stock units (collectively, “Full Value Awards”), stock options and other stock-based awards as incentives to encourage employees, consultants and non-employee directors to participate in the long-term success of the Company. As of March 31, 2025, there were 2,421,057 shares available for grant under the 2020 Plan.

Total stock-based compensation expense was as follows:

	Three Months Ended March 31,
	2025		2024
	(In thousands)
Employees	$	6,822	$	6,893
Non-employee directors and consultants		874		405
Total stock-based compensation	$	7,696	$	7,298

The Company records stock-based compensation expense for employees in employee compensation and benefits and for non-employee directors and consultants in general and administrative expenses in the Consolidated Statements of Operations. Total stock-based compensation for employees includes $0.4 million and $0.2 million of capitalized software development costs for the three months ended March 31, 2025 and 2024, respectively.

During the three months ended March 31, 2025, the Company granted (i) 146,977 restricted stock units, (ii) 20,606 stock options and (iii) performance stock units with an expected pay-out at target of 35,549 shares of common stock. The fair values of the restricted stock units and performance stock units were based on a weighted-average fair value per unit at the grant date of $193.75 and $193.49, respectively. The weighted-average fair value for stock options of $67.20 per share was based on the Black-Scholes option pricing model.

As of March 31, 2025, the total unrecognized compensation cost related to all non-vested awards was $68.7 million. That cost is expected to be recognized over a weighted-average period of 2.3 years.

22

MARKETAXESS HOLDINGS INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

(Unaudited)

Employee Stock Purchase Plan

The Company maintains the MarketAxess Holdings Inc. 2022 Employee Stock Purchase Plan (the “ESPP”). During the three months ended March 31, 2025, the Company issued 5,698 shares of common stock under the ESPP. As of March 31, 2025, there were 102,357 shares available for purchase under the ESPP.

10. Earnings Per Share

The following table sets forth basic and diluted weighted average shares outstanding used to compute earnings per share:

		Three Months Ended March 31,
		2025		2024
	(In thousands, except per share amounts)
Basic weighted average shares outstanding			37,388		37,740
Dilutive effect of stock options and full value awards			68		50
Diluted weighted average shares outstanding			37,456		37,790
Basic earnings per share		$	0.40	$	1.92
Diluted earnings per share			0.40		1.92

Stock options and Full Value Awards totaling 312,466 shares and 571,145 shares for the three months ended March 31, 2025 and 2024, respectively, were excluded from the computation of diluted earnings per share because their effect would have been antidilutive. The computation of diluted shares can vary among periods due, in part, to the change in the average price of the Company’s common stock.

11. Credit Agreements and Short-term Financing

Credit Agreement

On August 9, 2023, the Company entered into a three-year revolving credit facility (the “Credit Agreement”) provided by a syndicate of lenders and JPMorgan Chase Bank, N.A., as administrative agent, which provides aggregate commitments totaling $750.0 million, including a revolving credit facility, a $5.0 million letter of credit sub-limit for standby letters of credit and a $380.0 million sub-limit for swingline loans. The Credit Agreement will mature on August 9, 2026, with the Company’s option to request up to two additional 364-day extensions at the discretion of each lender and subject to customary conditions. Subject to satisfaction of certain specified conditions, the Company is permitted to upsize the Credit Agreement by up to $375.0 million in total. As of March 31, 2025, the Company had $0.1 million in letters of credit outstanding and $749.9 million in available borrowing capacity under the Credit Agreement.

Borrowings under the Credit Agreement will bear interest at a rate per annum equal to an alternate base rate or the adjusted term Secured Overnight Financing Rate (“SOFR”) rate, plus an applicable margin that varies with the Company’s consolidated total leverage ratio. The Credit Agreement requires that the Company satisfy certain covenants, including a requirement not to exceed a maximum consolidated total leverage ratio. The Company incurred no interest expense under the Credit Agreement for each of the three months ended March 31, 2025 and 2024.

Uncommitted Collateralized Agreements

In connection with their self-clearing operations, certain of the Company’s U.S. and U.K. operating subsidiaries maintain agreements with a settlement bank to allow the subsidiaries to borrow in the aggregate of up to $500.0 million on an uncommitted basis, collateralized by eligible securities pledged by the subsidiaries to the settlement bank, subject to certain haircuts. Borrowings under these agreements will bear interest at a base rate per annum equal to the higher of the upper range of the Federal Funds Rate, 0.25% or one-month SOFR, plus 1.00%.

The Company incurred no interest expense on borrowings under such agreements during each of the three months ended March 31, 2025 and 2024. As of March 31, 2025, the Company had no borrowings outstanding and up to $500.0 million in available uncommitted borrowing capacity under such agreements.

23

MARKETAXESS HOLDINGS INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

(Unaudited)

Short-term Financing

Under arrangements with their settlement banks, certain of the Company’s U.S. and U.K. operating subsidiaries may receive overnight financing in the form of bank overdrafts. The Company incurred interest expense on such overnight financing of $0.2 million and $0.3 million during the three months ended March 31, 2025 and 2024, respectively. As of March 31, 2025, the Company had no overdrafts payable outstanding.

12. Leases

The Company has operating leases for corporate offices with initial lease terms ranging from one year to 15 years. Certain leases contain options to extend the initial term at the Company’s discretion. The Company accounts for the option to extend when it is reasonably certain of being exercised. The Company’s lease agreements do not contain any material residual value guarantees, restrictions or covenants. The Company also has operating and finance leases for equipment with initial lease terms ranging from one-year to 5 years.

The following table presents the components of operating lease expense for the three months ended March 31, 2025 and 2024:

		Three Months Ended March 31,
Lease cost:	Classification	2025		2024
		(In thousands)
Operating lease cost - office space	Occupancy	$	2,751	$	2,753
Operating lease cost - equipment	Technology and communications		98		98
Variable lease costs	Occupancy		785		587
Total operating lease cost		$	3,634	$	3,438

Finance lease expense was $0.1 million for each of the three months ended March 31, 2025 and 2024.

The Company determines whether an arrangement is, or includes, a lease at contract inception. Operating lease right-of-use assets and liabilities are recognized at commencement date and are initially measured based on the present value of lease payments over the defined lease term. As the Company’s leases do not provide an implicit rate, the Company used its incremental borrowing rate based on the information available at the adoption date in determining the present value of lease payments.

The weighted average remaining lease term and weighted average discount rate are as follows:

	As of
Lease Term and Discount Rate	March 31, 2025			December 31, 2024
Weighted average remaining lease term (in years) - operating leases		8.6			8.8
Weighted average discount rate - operating leases		6.1	%		6.1	%
Weighted average remaining lease term (in years) - finance leases		0.5			0.8
Weighted average discount rate - finance leases		7.2	%		7.2	%

The following table presents the maturity of lease liabilities as of March 31, 2025:

	Operating Leases		Finance Leases
	(In thousands)
Remainder of 2025	$	9,611		59
2026		12,233		—
2027		9,321		—
2028		8,692		—
2029		8,994		—
2030 and thereafter		42,199		—
Total lease payments		91,050		59
Less: imputed interest		20,247		1
Present value of lease liabilities	$	70,803	$	58

24

MARKETAXESS HOLDINGS INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

(Unaudited)

13. Commitments and Contingencies

Legal

In the normal course of business, the Company and its subsidiaries included in the consolidated financial statements may be involved in various lawsuits, proceedings and regulatory examinations. The Company assesses its liabilities and contingencies in connection with outstanding legal proceedings, if any, utilizing the latest information available. For matters where it is probable that the Company will incur a material loss and the amount can be reasonably estimated, the Company will establish an accrual for the loss. Once established, the accrual will be adjusted to reflect any relevant developments. When a loss contingency is not both probable and estimable, the Company does not establish an accrual.

Based on currently available information, the outcome of the Company’s outstanding matters is not expected to have a material adverse impact on the Company’s financial position. It is not presently possible to determine the ultimate exposure to these matters, and there is no assurance that the resolution of the outstanding matters will not significantly exceed any reserves accrued by the Company.

Other

The Company, through certain of its subsidiaries, executes securities transactions between its institutional investor and broker-dealer clients on a matched principal basis by serving as counterparty to both the buyer and the seller in trades. The Company’s operating subsidiaries settle such transactions pursuant to their self-clearing operations or through the use of third-party clearing brokers or settlement agents. Settlement typically occurs within one to two trading days after the trade date. Cash settlement of the transaction occurs upon receipt or delivery of the underlying instrument that was traded. Under both the self-clearing and the third-party clearing models, the Company may be exposed to credit risk in the event a counterparty does not fulfill its obligation to complete a transaction or if there is an error in executing a matched principal transaction. Pursuant to the terms of the securities clearing agreements, each third-party clearing broker has the right to charge the Company for any losses they suffer resulting from a counterparty’s failure on any of the Company’s trades. The Company did not record any liabilities or losses with regard to counterparty failures for the three months ended March 31, 2025 and 2024.

In the normal course of business, the Company enters into contracts that contain a variety of representations, warranties and indemnification provisions. The Company’s maximum exposure under these arrangements is unknown, as this would involve future claims that may be made against the Company that have not yet occurred. However, based on experience, the Company expects the risk of loss to be remote.

14. Share Repurchase Programs

In January 2022, the Board of Directors authorized a share repurchase program for up to $150.0 million (the “2022 Repurchase Program”). In August 2024, the Board of Directors authorized a share repurchase program for up to an additional $200.0 million (the “2024 Repurchase Program” and, together with the 2022 Repurchase Program, the “Repurchase Programs”). The Repurchase Programs do not have an expiration date. During the three months ended March 31, 2025, the Company repurchased 187,905 shares of common stock under the Repurchase Programs at a cost of $38.1 million. As of March 31, 2025, the 2022 Repurchase Plan has been exhausted and the Company had $187.0 million of remaining capacity under the 2024 Repurchase Program. Shares repurchased under the Repurchase Programs will be held in treasury for future use.

15. Segment and Geographic Information

The Company’s end-to-end trading solutions comprise one reportable segment. The Company’s end-to-end trading solutions segment includes the operation of electronic platforms for the trading of fixed-income and other securities and related data, analytics, compliance tools, post-trade services and technology services. The Company derives revenue primarily in North America and Europe and manages its business activities on a consolidated basis. The Company considers its operations to constitute a single business segment due to the highly integrated nature of these products and services within the trading lifecycle, the use of a single inter-connected suite of technology solutions underlying all services, the financial markets in which the Company competes and the Company’s worldwide business activities.

25

MARKETAXESS HOLDINGS INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

(Unaudited)

The accounting policies of the Company’s reportable segment are the same as those described in the summary of significant accounting policies. The Company’s chief operating decision maker (“CODM”) assesses performance of the Company overall and decides how to allocate resources based on net income that is reported on the consolidated statement of operations as net income. The measure of segment assets is reported on the consolidated statement of financial condition as total assets. The Company’s CODM is its Chief Executive Officer. The CODM uses net income to evaluate income generated from segment assets in deciding whether to reinvest profits into the Company’s end-to-end trading solutions or into other areas, such as for acquisitions or to pay dividends. Net income is used to monitor budget versus actual results. The significant segment expenses and net income reviewed by the CODM conform to the presentation of such items in the consolidated statements of operations.

For the three months ended March 31, 2025 and 2024, the U.K. was the only individual foreign country in which the Company had operations that accounted for 10.0% or more of total revenues or total long-lived assets. Revenues and long-lived assets are attributed to a geographic area based on the location of the client trading activity and receipt of services. Long-lived assets are defined as furniture, equipment, leasehold improvements and capitalized software. Revenues for the three months ended March 31, 2025 and 2024, and long-lived assets as of March 31, 2025 and December 31, 2024 were as follows:

	Three Months Ended March 31,
	2025		2024
	(In thousands)
Revenues
United States	$	142,660	$	145,275
United Kingdom		42,729		41,220
Other		23,187		23,823
Total	$	208,576	$	210,318

	As of
	March 31, 2025		December 31, 2024
	(In thousands)
Long-lived assets, as defined
United States	$	94,594	$	92,983
United Kingdom		11,736		12,683
Other		1,528		1,632
Total	$	107,858	$	107,298

16. Cash and Cash Equivalents and Restricted Cash

The following table provides a reconciliation of cash and cash equivalents together with restricted or segregated cash as reported within the Consolidated Statements of Financial Condition to the sum of the same such amounts shown in the Consolidated Statements of Cash Flows:

		As of
	Statement of Financial Condition Location	March 31, 2025		December 31, 2024
		(In thousands)
Cash and cash equivalents	Cash and cash equivalents	$	486,224	$	544,478
Cash segregated for regulatory    purposes	Cash segregated under federal    regulations		47,514		47,107
Restricted cash deposits with clearing    organizations and broker-dealers	Receivables from broker-dealers,    clearing organizations    and customers		110,544		107,652
Other cash deposits	Prepaid expenses and other assets		172		1,222
Total		$	644,454	$	700,459

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Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations

Forward-Looking Statements

This report contains certain “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995. Forward-looking statements may be identified by words such as “expects,” “intends,” “anticipates,” “plans,” “believes,” “seeks,” “estimates,” “will,” or words of similar meaning and include, but are not limited to, statements regarding the outlook for our future business and financial performance. Forward-looking statements are based on management’s current expectations and assumptions, which are subject to inherent uncertainties, risks and changes in circumstances that are difficult to predict. It is routine for our internal projections and expectations to change as the year or each quarter in the year progresses, and therefore it should be clearly understood that the internal projections and beliefs upon which we base our expectations may change prior to the end of each quarter or the year. Although these expectations may change, we undertake no obligation to revise or update any forward-looking statements contained in this report, except to the extent required by applicable law. Our Company’s policy is generally to provide our expectations only once per quarter, and not to update that information until the next quarter. Actual future events or results may differ, perhaps materially from those contained in the projections or forward-looking statements. Factors that could cause or contribute to such differences include those discussed below and elsewhere in this report, particularly in the section captioned Part II, Item 1A, “Risk Factors,” and in our Form 10-K for the year ended December 31, 2024, including in Part I, Item 1A, “Risk Factors” and Part II, Item 7 “Management’s Discussion and Analysis of Financial Condition and Results of Operations.”

Executive Overview

MarketAxess operates leading electronic trading platforms delivering greater trading efficiency, a diversified pool of liquidity and significant cost savings to our clients across the global fixed-income markets. Approximately 2,100 institutional investor and broker-dealer firms use our patented trading technology to efficiently trade U.S. high-grade bonds, U.S. high-yield bonds, emerging market debt, eurobonds, municipal bonds, U.S. government bonds and other fixed-income securities. We leverage our diverse set of trading protocols, automated and algorithmic trading solutions, intelligent data and index products and a range of post-trade services to provide an end-to-end trading solution to our robust network of platform participants. Our award-winning Open Trading marketplace is widely regarded as the preferred all-to-all trading solution in the global credit markets, creating a unique liquidity pool for a broad range of credit market participants.

We provide automated and algorithmic trading solutions that we believe, when combined with our integrated and actionable data offerings, help our clients make faster, better-informed decisions on when and how to trade on our platforms. In 2024, we continued our roll-out of X-Pro, our newest trading platform, to more seamlessly combine our trading protocols with our proprietary data and pre-trade analytics. Our AI-driven technology, such as CP+, our real-time pricing engine, is a critical data input and pricing source for multiple MarketAxess trading protocols and solutions, including Auto-X™ and portfolio trading. In 2024, we leveraged our recent acquisition of Pragma, a quantitative trading technology provider specializing in algorithmic and analytical trading services, to accelerate our development of AI driven execution algorithms across all of our key product areas. We believe that we will be able to enhance our capabilities and increase our efficiency by leveraging Pragma technology across our technology stack.

We also provide a number of integrated and actionable data offerings, including CP+ and Axess All, to assist clients with real-time pricing and trading decisions and transaction cost analysis. We offer a range of post-trade services, including straight-through processing, post-trade matching, trade publication, regulatory transaction reporting and market and reference data across fixed-income and other products.

We operate in a large and growing market that provides us with a significant opportunity for future growth, due, in part, to the relatively low levels of electronic trading in many of our largest current product areas. We offer Open Trading for most of our products in order to capitalize on this addressable market by increasing the number of potential trading counterparties and providing our clients with a menu of solutions at each step in the trading process. We believe that Open Trading drives meaningful price improvement for our clients and reduces risk in fixed-income markets by creating a global, diversified pool of liquidity whereby our institutional investor, dealer and alternative liquidity provider clients can all interact on an anonymous basis. Institutional investors can also send trading inquiries directly to their traditional broker-dealer counterparties on a disclosed basis, while simultaneously accessing additional counterparties through our anonymous Open Trading solutions.

We derive revenue from commissions for transactions executed on our platforms, information services, post-trade services and technology services. Our expenses consist of employee compensation and benefits, depreciation and amortization, technology and communication expenses, professional and consulting fees, occupancy, marketing and advertising, clearing costs and general and administrative expenses.

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Our objective is to create the leading global network for the trading of fixed-income securities for our broker-dealer and institutional investor clients to help them connect, be more efficient and achieve better trading outcomes. We seek to achieve this goal by offering our clients full end-to-end electronic trading solutions and workflow tools, powered by a broad array of proprietary data and analytical tools. The key elements of our strategy are discussed in Part I, Item 1. “Business – Our Strategy” of our Form 10-K for the year ended December 31, 2024.

Critical Factors Affecting Our Industry and Our Company

Economic, Political and Market Factors

The global fixed-income securities industry is risky and volatile and is directly affected by a number of economic, political and market factors that may impact trading volume. These factors could have a material adverse or positive effect on our business, financial condition and results of operations. These factors include, among others, fixed-income market conditions, the current interest rate environment, including the volatility of interest rates and investors’ forecasts of future interest rates, the duration of bonds traded, economic and political conditions in the United States, Europe and elsewhere, including recent and potential future changes in tariffs, international trade agreements or trade policies, and the consolidation or contraction of our broker-dealer and institutional investor clients.

In the first quarter of 2025, the market backdrop for the Company showed strong increases in estimated U.S. credit market volumes, with U.S. high-grade and U.S. high-yield market average daily volume up 8.4% and 14.1%, respectively, compared to the prior year. However, despite an increase in volatility during March, credit spreads and credit spread volatility remained at relatively low levels throughout much of the first quarter of 2025. With regard to the international products traded on our platforms, emerging markets estimated market volumes increased significantly compared to the prior year.

Because the majority of our assets are short-term in nature, they are not significantly affected by inflation. However, the rate of inflation impacts our expenses, such as employee compensation, technology and communications expenses, which may not be readily recoverable in the prices of our services. Interest rates have remained higher since 2023 due to a period of increased inflation. To the extent interest rates remain high or inflation has other adverse effects on the securities markets or the economy, our financial position and results of operations may be adversely affected.

We expect that current cash and investment balances, in combination with cash flows that are generated from operations and the ability to borrow under our Credit Agreement, will be sufficient to meet our liquidity needs and planned capital expenditure requirements for at least the next twelve months. We ended the quarter with $749.9 million in available borrowing capacity under the Credit Agreement and capital significantly in excess of our regulatory requirements.

Competitive Landscape

The global fixed-income securities industry generally, and the electronic financial services markets in which we engage, in particular, are highly competitive, and we expect competition to intensify in the future. Sources of competition for us will continue to include, among others, bond trading conducted directly between broker-dealers and their institutional investor clients over the telephone or electronically and other multi-dealer or all-to-all trading platforms. Competitors, including companies in which some of our broker-dealer clients have invested, have developed or acquired electronic trading platforms or have announced their intention to explore the development of electronic platforms or information networks that may compete with us.

We primarily compete on the basis of our client network, the liquidity provided by our dealer, and, to a lesser extent, institutional investor clients, the total transaction costs and fees associated with our services, the breadth of products, protocols and services offered, as well as the quality, reliability, security and ease of use of our platforms. We believe that our ability to grow volumes and revenues will largely depend on our performance with respect to these factors.

There has been increased demand for portfolio trading workflows over the last few years, which has resulted in heightened competition among trading platforms to enhance their portfolio trading offerings and expand them across different geographies and products. Clients have been using portfolio trading workflows in lieu of more established trading protocols designed to generate price competition on individual bonds. Our dealer clients have also increased their usage of matching sessions offered by competing platforms in recent periods. To the extent that our clients increase their use of portfolio trading and matching session protocols offered by other platforms, our market share in those products could decrease. Due to the large size of the trades and the concentration of activity at the end of the month, portfolio trading can drive significant swings in trading volumes and estimated market share.

Our competitive position is enhanced by the unique liquidity provided by our Open Trading functionalities and the integration of our broker-dealer and institutional investor clients with our electronic trading platforms and other systems. We have focused on the unique aspects of the fixed-income markets we serve in the development of our platforms, working closely with our clients to provide a system that is suited to their needs.

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Regulatory Environment

Our business is subject to extensive regulations in the United States and internationally, which may expose us to significant regulatory risk and cause additional legal costs to ensure compliance. The existing legal framework that governs the financial markets is periodically reviewed and amended, resulting in the enactment and enforcement of new laws and regulations that apply to our business. In January 2022, the SEC proposed rules that will expand Regulation ATS and Regulation SCI to alternative trading systems (ATS) that trade government securities and amend the SEC rule regarding the definition of an “exchange” to include Communication Protocol Systems, such as our request-for-quote protocols. Based on these proposed rules, we expect that we will have to operate additional trading protocols in compliance with Regulation ATS and we could become subject to Regulation SCI for certain parts of our business in the future. The SEC also recently adopted final rules regarding the central clearing of certain secondary market transactions involving U.S. Treasury securities, which are currently set to become effective for certain cash market transactions on December 31, 2026. Once effective, this central clearing mandate will impact certain of our participants who do not centrally clear such trades today, and some of our investor clients have expressed concerns about using platforms that will require the clearing of any resultant trades executed on such platforms. While we expect this change will increase our own platform efficiency, it is still unknown at this time the full impact of this change, and what effect it will have, whether positive or negative, on our industry, our clients or us. In addition, following the change in U.S. presidential administrations in January 2025, it is unknown to what extent new legislation will be passed into law or whether pending or new regulatory proposals will be adopted, abandoned or modified, or what effect such passage, adoption, abandonment or modification will have, whether positive or negative, on our industry, our clients or us.

We provide regulated services to our clients within the E.U. in reliance upon the authorizations our subsidiaries have received from the AFM in the Netherlands. Brexit has led to an ongoing divergence between the U.K. and E.U. financial regulations, which has made it more difficult and costly to comply with the extensive government regulation to which we are subject. The cost and complexity of operating across increasingly divergent regulatory regimes has increased and is likely to continue to increase in the future.

Compliance with new regulations may require us to dedicate additional financial and operational resources, which may adversely affect our profitability. For example, the E.U.’s Digital Operational Resilience Act (“DORA”), which focuses on the security of network and information systems of financial services entities, as well as third parties which provide certain information communication technology services (“ICTs”) to them, became applicable to portions of our business in January 2025. DORA has, among other things, introduced significant additional ICT-related governance, risk management, resilience testing and sub-contracting and notification requirements. However, we also believe new regulations may increase demand for our platforms and we believe we are well positioned to benefit from those regulatory changes that cause market participants to seek electronic trading platforms that meet the various regulatory requirements.

For further description of the regulations which govern our business, see Part I, Item 1. “Business—Government Regulation”

of our Form 10-K for the year ended December 31, 2024.

Technology Environment

We must continue to enhance and improve our electronic trading platforms. The markets in which we compete are characterized by increasingly complex protocols, systems, technology and infrastructure requirements that require us to devote substantial resources to modify and adapt our services. Our future success will depend on our ability to enhance our existing products and services, develop and/or license new products and technologies that address the increasingly sophisticated and varied needs of our existing and prospective broker-dealer and institutional investor clients and respond to technological advances and emerging industry and regulatory standards and practices, including cloud and AI technologies, on a cost-effective and timely basis. For example, in 2023, we introduced MarketAxess X-Pro, our newest trading platform, which provides traders with a flexible user experience, intuitive workflows and access to our proprietary data and pre-trade analytics. In addition, as the overall share of electronic trading grows in global credit products, we are experiencing continued demand for, and growth in, our automated and algorithmic trading solutions. We also support a large and growing base of dealer market making algorithms. We plan to continue to focus on technology infrastructure and automation initiatives to support more efficient trade execution by our clients.

We experience cybersecurity threats and incidents from time to time. However, as of the date of this report, MarketAxess has not experienced a cybersecurity threat or incident that has materially affected the Company in at least the past three years. Cybersecurity incidents could impact revenue and operating income and increase costs. We therefore continue to make investments in our cybersecurity infrastructure and training of employees, which may result in increased costs, to strengthen our cybersecurity measures.

See also Part I, Item 1A. – “Risk Factors, Technology, IT Systems and Cybersecurity Risks” and Part I, Item 1C – “Cybersecurity” of our Form 10-K for the year ended December 31, 2024.

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Trends in Our Business

The majority of our revenue is derived from commissions for transactions executed on our platforms between and among our institutional investor and broker-dealer clients. We believe that the following are the key variables that impact the notional value of such transactions on our platforms, the amount of commissions earned by us and our variable transaction fees per million:

• the number of participants on our platforms and their willingness to use our platforms instead of competitors’ platforms or other execution methods;

• the particular trading protocol that our participants use to trade bonds on our platforms;

• the frequency and competitiveness of the price responses by participants on our platforms;

• the number of markets that are available for our clients to trade on our platforms and the mix of products that participants trade on our platforms;

• the overall level of activity in these markets;

• the duration of the bonds trading on our platforms, which may be affected by inflation, among other macroeconomic factors; and

• the particular fee plan under which we earn commissions.

We believe that overall corporate bond market trading volume is affected by various factors including the absolute levels of interest rates, the direction of interest rate movements, the level of new issues of corporate bonds and the volatility of corporate bond spreads versus U.S. Treasury securities. Because a significant percentage of our revenue is tied directly to the volume of securities traded on our platforms, it is likely that a general decline in trading volumes, regardless of the cause of such decline, would reduce our revenues and have a significant negative impact on profitability.

As further described under “— Critical Factors Affecting our Industry and our Company — Economic, Political and Market Factors,” and “— Results of Operations — Three Months Ended March 31, 2025 Compared to Three Months Ended March 31, 2024,” our trading volumes increased and our average variable transaction fee per million decreased compared to the three months ended March 31, 2024.

Components of Our Results of Operations

Commission Revenue

Commissions are recognized on a trade date basis, are generally calculated as a percentage of the notional dollar volume of bonds traded on our platforms and vary based on the type, size, yield and maturity of the bond traded, as well as individual client incentives. Bonds that are more actively traded or that have shorter maturities are generally charged lower commissions, while bonds that are less actively traded or that have longer maturities generally command higher commissions.

For Open Trading trades that we execute between and among institutional investor and broker-dealer clients on a matched principal basis by serving as counterparty to both the buyer and the seller, we earn our commission through the difference in price between the two trades. For the majority of U.S. Treasury matched principal trades, commissions are invoiced and recorded on a monthly basis.

Credit Commissions. Credit includes U.S. high-grade corporate bonds, high-yield bonds, emerging markets bonds, eurobonds, municipal bonds and leveraged loans. Our U.S. high-grade corporate bond fee plans generally incorporate variable transaction fees and fixed distribution fees billed to our broker-dealer clients on a monthly basis. Certain broker-dealers participate in fee programs that do not contain monthly distribution fees and instead incorporate additional per transaction execution fees and minimum monthly fee commitments. Under these fee plans, we electronically add the transaction fee to the spread quoted by the broker-dealer client. The U.S. high-grade transaction fee is generally designated in basis points in yield and, as a result, is subject to fluctuation depending on the duration of the bond traded.

Commissions for high-yield bonds, emerging markets bonds, eurobonds, municipal bonds and leveraged loans generally vary based on the type of the instrument traded using standard fee schedules. Our high-yield fee plan structure is similar to our U.S. high-grade fee plans. Certain dealers participate in a high-yield fee plan that incorporates a variable transaction fee and a fixed distribution fee, while other dealers participate in a plan that does not contain monthly distribution fees and instead incorporates additional per transaction execution fees and minimum monthly fee commitments.

The average credit fees per million may vary in the future due to changes in yield, years-to-maturity and nominal size of high-grade bonds traded on our platforms and changes in product mix or trading protocols.

Credit distribution fees include any unused monthly fee commitments under our variable fee plans.

Rates Commissions. Rates includes U.S. Treasury, U.S. agency and European government bonds. Commissions for rates products generally vary based on the type of the instrument traded. U.S. Treasury fee plans are typically volume tiered and can vary based on the trading protocol. The average rates fee per million may vary in the future due to changes in product mix or trading protocols.

30

We anticipate that average fees per million may change in the future. Consequently, past trends in commissions are not necessarily indicative of future commissions.

Other Commissions. Other commissions include equities and foreign exchange commissions for Pragma’s algorithmic trading services. Commissions for equities and foreign exchange are volume-tiered and consist of variable transaction fees that are billed monthly.

Information Services

We generate revenue from data licensed to our broker-dealer clients, institutional investor clients and data-only subscribers; professional and consulting services; technology software licenses; and maintenance and support services. These revenues are either for subscription-based services transferred over time, and may be net of volume-based discounts, or one-time services. Revenues for services transferred over time are recognized ratably over the contract period while revenues for services transferred at a point in time are recognized in the period the services are provided. Customers are generally billed monthly, quarterly, or annually; revenues billed in advance are deferred and recognized ratably over the contract period.

Post-trade Services

We generate revenue from regulatory transaction reporting, trade publication and post-trade matching services. Customers are generally billed in the current month or monthly in arrears and revenue is recognized in the period that the transactions are processed. Revenues billed in advance are deferred and recognized ratably over the contract period. We also generate one-time implementation fees for onboarding clients, which are invoiced and recognized in the period the implementation is complete.

Technology Services

Technology services include technology services revenue generated by Pragma and revenue generated from telecommunications line charges to broker-dealer clients.

Expenses

In the normal course of business, we incur the following expenses:

Employee Compensation and Benefits. Employee compensation and benefits is our most significant expense and includes employee salaries, stock-based compensation costs, other incentive compensation, employee benefits and payroll taxes.

Depreciation and Amortization. We depreciate our computer hardware and related software, office hardware and furniture and fixtures and amortize our capitalized software development costs on a straight-line basis over three to five years. We amortize leasehold improvements on a straight-line basis over the lesser of the life of the improvement or the remaining term of the lease. Intangible assets with definite lives, including purchased technologies, customer relationships and other intangible assets, are amortized over their estimated useful lives, which range from one to 15 years, using either a straight-line or accelerated amortization method based on the pattern of economic benefit that we expect to realize from such assets. Intangible assets are assessed for impairment when events or circumstances indicate a possible impairment.

Technology and Communications. Technology and communications expense consists primarily of costs relating to software and licenses, maintenance on software and hardware, cloud hosting costs, data feeds provided by outside vendors, U.S. government bonds technology platform licensing fees, data center hosting costs and our internal network connections. The majority of our broker-dealer clients have dedicated high-speed communication lines to our network in order to provide fast data transfer. We charge our broker-dealer clients a monthly fee for these connections, which is recovered against the relevant expenses we incur.

Professional and Consulting Fees. Professional and consulting fees consist primarily of accounting fees, legal fees and fees paid to information technology and other consultants for services provided for the maintenance of our trading platforms, information and post-trade services products and other services.

Occupancy. Occupancy costs consist primarily of office and equipment rent, utilities and commercial rent tax.

Marketing and Advertising. Marketing and advertising expense consists primarily of branding and other advertising expenses we incur to promote our products and services. This expense also includes costs associated with attending or exhibiting at industry-sponsored seminars, conferences and conventions, and travel and entertainment expenses incurred by our sales force to promote our trading platforms, information services and post-trade services.

Clearing Costs. Clearing costs consist of fees that we are charged by third-party clearing brokers and depositories for the clearing and settlement of matched principal trades, regulatory reporting fees and variable transaction fees assessed by the provider of our third-party middle office system.

General and Administrative. General and administrative expense consists primarily of general travel and entertainment, board of directors’ expenses, regulatory fees, subscription costs, charitable contributions, provision for doubtful accounts, various state franchise and U.K. value-added taxes and other miscellaneous expenses.

31

Expenses may continue to grow in the future, notably in employee compensation and benefits as we increase headcount to support investment in new products, operational support and geographic expansion, depreciation and amortization due to increased investment in new products and enhancements to our trading platforms, and technology and communication costs. Expenses may also grow due to increased regulatory complexity, acquisitions or the continued effects of inflation.

Other Income (Expense)

Interest Income. Interest income consists of interest income earned on our cash and cash equivalents, restricted cash, deposits and investments.

Interest Expense. Interest expense consists of financing charges incurred on short-term borrowings.

Equity in Earnings of Unconsolidated Affiliate. Equity in earnings of unconsolidated affiliate represents the proportionate share of our equity method investee’s net income.

Other, Net. Other, net consists of realized and unrealized gains and losses on trading security investments and foreign currency forward contracts, foreign currency transaction gains or losses, investment advisory fees, credit facility administrative fees, gains or losses on revaluations of contingent consideration payable and other miscellaneous revenues and expenses.

Critical Accounting Estimates

This Management’s Discussion and Analysis of Financial Condition and Results of Operations discusses our Consolidated Financial Statements, which have been prepared in accordance with accounting principles generally accepted in the United States. The preparation of these financial statements requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the reported amounts of income and expenses during the reporting periods. We base our estimates and judgments on historical experience and on various other factors that we believe are reasonable under the circumstances. Actual results may differ from these estimates under varying assumptions or conditions. Critical accounting estimates for us include stock-based compensation.

Stock-based compensation

We maintain the 2020 Plan which provides for the grant of Full Value Awards, stock options and other stock-based awards to encourage employees, consultants and non-employee directors to participate in our long-term success. We make critical accounting estimates related to performance stock units granted under the 2020 Plan (the “PSUs”).

In 2023, 2024 and 2025, the PSUs were granted to the executive officers and certain senior managers. Each PSU is earned or forfeited based on our level of achievement of certain predetermined metrics, including pre-tax adjusted operating margin, U.S. credit market share and revenue growth excluding U.S. credit. The vested share payout ranges from zero to 200% of the PSU target. The number of PSUs that vest, if any, is determined by the level of achievement of the performance metrics during the three-year performance periods, as certified by the Compensation and Talent Committee following the conclusion of the performance period. In addition, participants must provide continued service through the vesting date, subject to death, disability and qualified retirement exceptions, as applicable. Compensation expense for the PSUs is measured using the fair value of our stock at the grant date and estimates of future performance and actual share payouts. Each period, we make estimates of the current expected share payouts and adjust the life-to-date compensation expense recognized since the grant date. As of March 31, 2025, a 10.0% change in the expected final share payouts would increase or decrease the life-to-date compensation expense by $1.7 million. The estimated final share payouts for the 2022 and 2023 awards as of March 31, 2025 decreased 7.2% compared to December 31, 2024. See Note 9 for a discussion of the Company’s stock-based compensation expense.

Uncertain tax positions

Our interpretations of tax laws around the world are subject to review and examination by the various taxing authorities in the jurisdictions where we operate, and disputes may occur regarding our view on a tax position. These disputes over interpretations with the various taxing authorities may be settled by audit, administrative appeals or adjudication in the court systems of the tax jurisdictions in which we operate.

In accounting for income taxes, we recognize tax positions in the financial statements only when it is more likely than not that the position will be sustained on examination by the relevant taxing authority or the court of last resort based on the technical merits of the position. We reassess our unrecognized tax benefits as necessary when new information becomes available, including changes in tax law and regulations, relevant tax court rulings and interactions with taxing authorities. Uncertain tax positions that meet the more-likely-than-not recognition threshold are measured to determine the amount of benefit to recognize. An uncertain tax position is measured based on the largest amount of benefit that we believe is more-likely-than-not to be realized upon settlement. It is possible that the reassessment of our unrecognized tax benefits may have a material impact on our effective income tax rate in the period in which the reassessment occurs. See Note 8 for a discussion of our provisions for unrecognized tax benefits related to current and prior periods.

32

Recent Accounting Pronouncements

See Note 2 for a discussion of any recent accounting pronouncements relevant to our Consolidated Financial Statements.

Segment Results

We provide end-to-end trading solutions, including the operation of electronic platforms for the trading of fixed-income and other securities and related data, analytics, compliance tools, post-trade services, automated trading services and technology services. We consider our operations to constitute a single business segment because of the highly integrated nature of these products and services within the trading lifecycle, the use of a single inter-connected suite of technology solutions underlying all services, the financial markets in which we compete and our worldwide business activities. See Note 15 to the Consolidated Financial Statements for certain geographic information about our business required by GAAP.

Results of Operations

Three Months Ended March 31, 2025 Compared to Three Months Ended March 31, 2024

The following table summarizes our financial results for the three months ended March 31, 2025 and 2024:

	Three Months Ended March 31,
	2025		2024		$ Change			% Change
	($ in thousands, except per share amounts)
Revenues	$	208,576	$	210,318	$	(1,742	)		(0.8	)	%
Expenses		120,194		117,818		2,376			2.0
Operating income		88,382		92,500		(4,118	)		(4.5	)
Other income (expense)		7,772		4,217		3,555			84.3
Income before income taxes		96,154		96,717		(563	)		(0.6	)
Provision for income taxes		81,089		24,102		56,987			236.4
Net income	$	15,065	$	72,615	$	(57,550	)		(79.3	)	%
Net income per common share – Diluted	$	0.40	$	1.92	$	(1.52	)		(79.0	)	%

Changes in average foreign currency exchange rates compared to the U.S. dollar had the effect of decreasing each of revenues and expenses by $0.3 million for the three months ended March 31, 2025 compared to the three months ended March 31, 2024.

Revenues

Our revenues for the three months ended March 31, 2025 and 2024, and the resulting dollar and percentage changes, were as follows:

	Three Months Ended March 31,
	2025					2024
	($ in thousands)
			% of Revenues					% of Revenues			$ Change			% Change
Commissions	$	181,343		86.9	%	$	184,873		87.9	%	$	(3,530	)		(1.9	)	%
Information services		12,904		6.2			11,881		5.6			1,023			8.6
Post-trade services		11,088		5.3			10,730		5.1			358			3.3
Technology services		3,241		1.6			2,834		1.4			407			14.4
Total revenues	$	208,576		100.0	%	$	210,318		100.0	%	$	(1,742	)		(0.8	)

33

Commissions. Our commission revenues for the three months ended March 31, 2025 and 2024, and the resulting dollar and percentage changes, were as follows:

	Three Months Ended March 31,
	2025		2024		$ Change			% Change
	($ in thousands)
Variable transaction fees
Credit	$	135,840	$	141,504	$	(5,664	)		(4.0	)	%
Rates		6,919	$	5,166		1,753			33.9
Other		5,232	$	4,849		383			7.9
Total variable transaction fees		147,991		151,519		(3,528	)		(2.3	)
Fixed distribution fees
Credit		33,265	$	33,288		(23	)		(0.1	)
Rates		87	$	66		21			31.8
Total fixed distribution fees		33,352		33,354		(2	)		(0.0	)
Total commissions	$	181,343	$	184,873	$	(3,530	)		(1.9	)	%

Credit variable transaction fees decreased by $5.7 million, driven by a 9.7% decrease in total credit average variable transaction fee per million offset by a 6.3% increase in trading volume. Rates variable transaction fees increased by $1.8 million, driven principally by a 52.9% increase in trading volumes, partially offset by a 12.3% decrease in average variable transaction fee per million. Other variable transaction fees include equities and foreign exchange commissions earned by Pragma.

Our trading volumes for the three months ended March 31, 2025 and 2024 were as follows:

	Three Months Ended March 31,
	2025		2024		$ Change		% Change
	($ in millions)
Trading volume data
Credit
High-grade	$	461,308	$	455,998	$	5,310		1.2	%
High-yield		89,997		85,379		4,618		5.4
Emerging markets		240,285		221,427		18,858		8.5
Eurobonds		147,917		128,849		19,068		14.8
Other credit		36,482		26,335		10,147		38.5
Total credit		975,989		917,988		58,001		6.3
Rates
U.S. government bonds		1,582,081		1,045,796		536,285		51.3
Agency and other government bonds		65,825		31,626		34,199		108.1
Total rates		1,647,906		1,077,422		570,484		52.9
Total trading volume	$	2,623,895	$	1,995,410	$	628,485		31.5	%
Number of U.S. Trading Days		61		61
Number of U.K. Trading Days		63		63

For volume reporting purposes, transactions in foreign currencies are converted to U.S. dollars at average monthly rates.

34

The 1.2% increase in our U.S. high-grade volume was principally due to an increase in estimated market volumes, partially offset by a decrease in our estimated market share. Estimated U.S. high-grade market volume as reported by TRACE increased by 8.4% to $2.6 trillion for the three months ended March 31, 2025 compared to the three months ended March 31, 2024. Our estimated market share of total U.S. high-grade corporate bond volume decreased to 18.0% for the three months ended March 31, 2025 from 19.3% for the three months ended March 31, 2024. U.S. high-yield volume increased by 5.4% primarily due to an increase in estimated market volumes partially offset by a decrease in our estimated market share. Our estimated market share of total U.S. high-yield corporate bond volume decreased to 11.9% for the three months ended March 31, 2025 from 12.9% for the three months ended March 31, 2024.

Emerging markets and Eurobond volumes increased by 8.5% and 14.8%, respectively. Other credit volumes increased 38.5%, mainly due to an increase in estimated municipal bond market volumes. Rates trading volume increased 52.9%, primarily due to an increase in estimated market volumes.

Our average variable transaction fee per million for the three months ended March 31, 2025 and 2024 was as follows:

	Three Months Ended March 31,
	2025		2024		$ Change			% Change
Average variable transaction fee per million
Credit	$	139.18	$	154.15	$	(14.97	)		(9.7	)	%
Rates		4.20		4.79		(0.59	)		(12.3	)

Credit average variable transaction fee per million decreased by 9.7% to 139.18 per million for the three months ended March 31, 2025, mainly due to product and protocol mix-shift reflecting lower levels of U.S. high-yield activity and increased portfolio trading, which was partially offset by an increase in the duration of U.S. high-grade bonds traded on our platforms.

Information Services. Information services revenue increased by $1.0 million for the three months ended March 31, 2025, mainly due to net new data contract revenue.

Post-Trade Services. Post-trade services revenue increased by $0.4 million for the three months ended March 31, 2025, principally due to net new contract revenue of $0.6 million, partially offset by the negative impact of foreign currency fluctuations of $0.2 million.

Technology Services. Technology services revenue increased by $0.4 million for the three months ended March 31, 2025 due to higher Pragma-related license and technology fees.

Expenses

The following table summarizes our expenses for the three months ended March 31, 2025 and 2024:

	Three Months Ended March 31,
	2025			2024		$ Change			% Change
		($ in thousands)
Expenses
Employee compensation and benefits	$		61,916	$	61,264	$	652			1.1		%
Depreciation and amortization			18,236		18,200		36			0.2
Technology and communications			18,048		17,051		997			5.8
Professional and consulting fees			6,410		6,395		15			0.2
Occupancy			3,622		3,425		197			5.8
Marketing and advertising			2,061		1,833		228			12.4
Clearing costs			4,185		4,911		(726	)		(14.8	)
General and administrative			5,716		4,739		977			20.6
Total expenses	$		120,194	$	117,818	$	2,376			2.0		%

35

Technology and communications expenses increased by $1.0 million primarily due to higher cloud hosting costs.

Clearing costs decreased by $0.7 million, primarily due to lower U.S. treasury platform clearing expenses.

General and administrative expenses increased by $1.0 million, primarily due to higher subscription costs.

Other Income (Expense)

Our other income (expense) for the three months ended March 31, 2025 and 2024, and the resulting dollar and percentage changes, were as follows:

	Three Months Ended March 31,
	2025				2024			$ Change			% Change
		($ in thousands)
Interest income	$		7,169		$	5,973		$	1,196				20.0		%
Interest expense			(213	)		(316	)		103				(32.6	)
Equity in earnings of unconsolidated affiliate			289			370			(81	)			(21.9	)
Other, net			527			(1,810	)		2,337			NM
Total other income (expense)	$		7,772		$	4,217		$	3,555				84.3		%
NM - not meaningful

Interest income increased by $1.2 million, driven by higher cash and investment balances.

Interest expense decreased by $0.1 million due to lower financing charges incurred under our short-term borrowing arrangements.

Other, net increased by $2.3 million primarily driven by unrealized gains of $1.1 million on our U.S. Treasury investments in the current period compared to unrealized losses of $0.3 million in the prior period and lower foreign currency transaction losses in the current period compared to the prior period of $0.9 million.

Provision for Income Taxes

The provision for income taxes and effective tax rate for the three months ended March 31, 2025 and 2024 were as follows:

	Three Months Ended March 31,
	2025				2024			$ Change		% Change
		($ in thousands)
Provision for income taxes	$		81,089		$	24,102		$	56,987		236.4	%
Effective tax rate			84.3	%		24.9	%

Our consolidated effective tax rate can vary from period to period depending on the geographic mix of our earnings, provisions for unrecognized tax benefits, changes in tax legislation and tax rates and the amount and timing of excess tax benefits or detriments related to share-based payments, among other factors. The provision for income taxes for the three months ended March 31, 2025 includes provisions for unrecognized tax benefits of $54.9 million and $1.4 million for uncertain tax positions related to prior periods and the current period, respectively.

36

Liquidity and Capital Resources

During the three months ended March 31, 2025, we have met our funding requirements through cash on hand, internally generated funds and short-term borrowings. Cash and cash equivalents and corporate bond and U.S. Treasury investments totaled $642.1 million as of March 31, 2025. Our investments generally consist of investment-grade corporate bonds and U.S. Treasury securities. We limit the amounts that can be invested in any single issuer and invest in short- to intermediate-term instruments whose fair values are less sensitive to interest rate changes.

In August 2023, we entered into the Credit Agreement, which provides aggregate commitments totaling $750.0 million, including a revolving credit facility, a $5.0 million letter of credit sub-limit for standby letters of credit and a $380.0 million sub-limit for swingline loans. The Credit Agreement will mature on August 9, 2026, with our option to request up to two additional 364-day extensions at the discretion of each lender and subject to customary conditions. As of March 31, 2025, we had $0.1 million in letters of credit outstanding and $749.9 million in available borrowing capacity under the Credit Agreement. Borrowings under the Credit Agreement will bear interest at a rate per annum equal to an alternate base rate or the adjusted term SOFR rate, plus an applicable margin that varies with our consolidated total leverage ratio. The Credit Agreement requires that we satisfy certain covenants, including a requirement to not exceed a maximum consolidated total leverage ratio. We were in compliance with all applicable covenants at March 31, 2025. See Note 11 to the Consolidated Financial Statements for a discussion of the Credit Agreement.

In connection with their self-clearing operations, certain of our operating subsidiaries maintain agreements with a settlement bank to allow the subsidiaries to borrow an aggregate of up to $500.0 million on an uncommitted basis, collateralized by eligible securities pledged by the subsidiaries to the settlement bank, subject to certain haircuts. Borrowings under these agreements will bear interest at a base rate per annum equal to the higher of the upper range of the Federal Funds Rate, 0.25% or one-month SOFR, plus 1.00%. As of March 31, 2025, the subsidiaries had no borrowings outstanding and up to $500.0 million in available uncommitted borrowing capacity under such agreements. See Note 11 to the Consolidated Financial Statements for a discussion of these agreements.

Under arrangements with their settlement banks, certain of our operating subsidiaries may receive overnight financing in the form of bank overdrafts. As of March 31, 2025, we had no overdrafts payable outstanding.

As a result of our self-clearing and settlement activities, we are required to finance certain transactions, maintain deposits with various clearing organizations and clearing broker-dealers and maintain a special reserve bank account for the benefit of customers pursuant to Rule 15c3-3 of the Exchange Act. As of March 31, 2025, the aggregate amount of the positions financed, restricted cash deposits and customer reserve balances associated with our self-clearing and settlement activities was $227.3 million. These requirements can fluctuate based on trading activity, market volatility or other factors which may impact our liquidity or require us to use our capital resources.

Cash Flows for the Three Months Ended March 31, 2025 Compared to the Three Months Ended March 31, 2024

Our cash flows were as follows:

	Three Months Ended March 31,
	2025			2024			$ Change			% Change
	($ in thousands)
Net cash provided by/(used in) operating activities	$	29,629		$	(4,949	)	$	34,578		NM
Net cash (used in) investing activities		(17,148	)		(15,830	)		(1,318	)		8.3		%
Net cash (used in) financing activities		(77,066	)		(52,543	)		(24,523	)		46.7
Effect of exchange rate changes on cash and    cash equivalents		8,580			(3,186	)		11,766		NM
Net decrease for the period	$	(56,005	)	$	(76,508	)	$	20,503			(26.8	)	%
NM - not meaningful

37

Cash flows from operating activities consist primarily of net income adjusted for non-cash items that primarily include depreciation and amortization, stock-based compensation expense, deferred tax expense and changes in receivables and payables on the consolidated statement of financial condition. The $34.6 million increase in net cash provided by operating activities was primarily due to favorable changes in income and other tax liabilities and net receivables from broker-dealers, clearing organizations and customers associated with our clearing activities, offset by lower net income and an unfavorable change in accounts receivable.

The $1.3 million increase in net cash used in investing activities was primarily due to higher capital expenditures.

The $24.5 million increase in net cash used in financing activities was principally due to higher repurchases of common stock and lower exercises of stock options, offset by lower withholding tax payments on the vesting of Full Value Awards.

The $11.8 million change in the effect of exchange rate changes on cash and cash equivalents was driven by changes in the cumulative translation adjustment.

Past trends of cash flows are not necessarily indicative of future cash flow levels. A decrease in cash flows may have a material adverse effect on our liquidity, business and financial condition.

Other Factors Influencing Liquidity and Capital Resources

We believe that our current resources are adequate to meet our liquidity needs and requirements, including commitments for capital expenditures, in the short-term (during the next 12 months). However, our future liquidity and capital requirements will depend on a number of factors, including liquidity requirements associated with our self-clearing operations and expenses associated with product development and expansion and new business opportunities that are intended to further diversify our revenue streams. We may also acquire or invest in technologies, business ventures or products that are complementary to our business. In the event we require any additional financing, it will take the form of equity or debt financing. Any additional equity offerings may result in dilution to our stockholders. Any debt financings, if available at all, may involve restrictive covenants with respect to dividends, issuances of additional capital and other financial and operational matters related to our business. In addition, in the long-term (beyond 12 months), we believe our liquidity needs and requirements will be affected by the factors discussed above.

Certain of our U.S. subsidiaries are registered as broker-dealers and are subject to the applicable rules and regulations of the SEC, FINRA and the CFTC. These rules contain minimum net capital requirements, as defined in the applicable regulations. Certain of our foreign subsidiaries are regulated by the FCA in the U.K. or other foreign regulators and must maintain financial resources, as defined in the applicable regulations, in excess of the applicable financial resources requirement. As of March 31, 2025, each of our subsidiaries that are subject to these regulations had net capital or financial resources in excess of their minimum requirements. As of March 31, 2025, our subsidiaries maintained aggregate net capital and financial resources that were $552.1 million in excess of the required levels of $36.6 million.

Each of our U.S. and foreign regulated subsidiaries are subject to local regulations which generally limit, or require the prior notification to or approval from such regulated entity’s principal regulator before, the repayment of borrowings from our affiliates, paying cash dividends, making loans to our affiliates or otherwise entering into transactions that result in a significant reduction in regulatory net capital or financial resources.

We execute securities transactions between our institutional investor and broker-dealer clients on a matched principal basis by serving as counterparty to both the buyer and the seller in trades. Our operating subsidiaries settle such transactions using their self-clearing operations or through the use of third-party clearing brokers or settlement agents. Settlement typically occurs within one to two trading days after the trade date. Cash settlement of the transaction occurs upon receipt or delivery of the underlying instrument that was traded. Under both the self-clearing and the third-party clearing models, we may be exposed to credit risk in the event a counterparty does not fulfill its obligation to complete a transaction or if there is an error in executing a matched principal transaction. Pursuant to the terms of the securities clearing agreements, each third-party clearing broker has the right to charge us for any losses they suffer resulting from a counterparty’s failure on any of our trades. We did not record any liabilities or losses with regard to counterparty failures for the three months ended March 31, 2025 and 2024. Substantially all of our open securities failed-to-deliver and securities failed-to-receive transactions as of March 31, 2025 have subsequently settled at the contractual amounts.

In the normal course of business, we enter into contracts that contain a variety of representations, warranties and indemnification provisions. Our maximum exposure from any claims under these arrangements is unknown, as this would involve claims that have not yet occurred.

We have leases for corporate offices and equipment with initial lease terms ranging from one year to 15 years. We have total future contractual rent payments on these leases of $91.1 million, with $12.8 million due within the next 12 months and $78.3 million due beyond 12 months.

We enter into foreign currency forward contracts to economically hedge our exposure to variability in certain foreign currency transaction gains and losses. As of March 31, 2025, the notional value of our foreign currency forward contract outstanding was $62.0 million and the fair value of the asset was $2.6 million.

38

In January 2022, our Board of Directors authorized the 2022 Repurchase Program for up to $150.0 million. In August 2024, our Board of Directors authorized the 2024 Repurchase Program for up to an additional $200.0 million. As of March 31, 2025, the 2022 Repurchase Program has been exhausted and we had $187.0 million of remaining capacity under the 2024 Repurchase Program. As of April 30, 2025, we had $173.4 million of remaining capacity under the 2024 Repurchase Program. Shares repurchased under the Repurchase Programs will be held in treasury for future use.

In April 2025, our Board of Directors approved a quarterly cash dividend of $0.76 per share payable on June 4, 2025 to stockholders of record as of the close of business on May 21, 2025. Any future declaration and payment of dividends will be at the sole discretion of our Board of Directors.

On April 19, 2024, we entered into an agreement to acquire a controlling interest in RFQ–hub Holdings LLC for approximately $37.9 million of cash consideration. The acquisition is subject to various closing conditions, including the receipt of certain regulatory approvals. Upon the closing of the acquisition, we will hold approximately a 90.0% controlling stake in RFQ-hub Holdings LLC.

Non-GAAP Financial Measures

In addition to reporting financial results in accordance with GAAP, we use certain non-GAAP financial measures: earnings before interest, taxes, depreciation and amortization (“EBITDA”), EBITDA margin and free cash flow. From time to time, we present selected GAAP-basis financial results, excluding notable items. Notable items are revenues, expenses, other income (expense) and tax related items that are non-recurring and outside of the Company’s normal course of business or other notables, such as acquisition and restructuring charges or gains/losses on sales (collectively, “notable items”). We define EBITDA margin as EBITDA divided by revenues. We define free cash flow as net cash provided by/(used in) operating activities excluding the net change in trading investments and net change in securities failed-to-deliver and securities failed-to-receive from broker-dealers, clearing organizations and customers, less expenditures for furniture, equipment and leasehold improvements and capitalized software development costs. Non-GAAP financial measures should be considered in addition to, not as a substitute for or superior to, financial measures determined in conformity with GAAP. We believe that these non-GAAP financial measures, when taken into consideration with the corresponding GAAP financial measures, provide additional information regarding our operating results because they assist both investors and management in analyzing and evaluating the performance of our business.

The table set forth below presents a reconciliation our net income to net income, excluding notable items, diluted EPS to diluted EPS, excluding notable items, and the effective tax rate to effective tax rate, excluding notable items for the three months ended March 31, 2025 and 2024:

		Three Months Ended March 31,
		2025				2024
		($ in thousands)
Net income, GAAP-basis	$		15,065		$		72,615
Exclude: Notable items
Reserve for uncertain tax positions related to prior periods			54,939				—
Net income, excluding notable items	$		70,004		$		72,615
Diluted EPS, GAAP-basis	$		0.40		$		1.92
Notable items as reconciled above			1.47				—
Diluted EPS, excluding notable items	$		1.87		$		1.92
Effective tax rate, GAAP-basis			84.3	%			24.9	%
Notable items as reconciled above			(57.1	)			—
Effective tax rate, excluding notable items			27.2	%			24.9	%

39

The table set forth below presents a reconciliation of our net income to EBITDA and net income margin to EBITDA margin, as defined above, for the three months ended March 31, 2025 and 2024:

	Three Months Ended March 31,
	2025			2024
	($ in thousands)
Net income	$	15,065		$	72,615
Interest income		(7,169	)		(5,973	)
Interest expense		213			316
Provision for income taxes		81,089			24,102
Depreciation and amortization		18,236			18,200
EBITDA	$	107,434		$	109,260
Net income margin		7.2	%		34.5	%
Interest income		(3.4	)		(2.8	)
Interest expense		0.1			0.2
Provision for income taxes		38.9			11.4
Depreciation and amortization		8.7			8.6
EBITDA margin		51.5	%		51.9	%

The table set forth below presents a reconciliation of our net cash provided by operating activities to free cash flow, as defined above, for the three months ended March 31, 2025 and 2024:

	Three Months Ended March 31,
	2025			2024
	($ in thousands)
Net cash provided by/(used in) operating activities	$	29,629		$	(4,949	)
Exclude: Net change in trading investments		—			(255	)
Exclude: Net change in fail-to-deliver/receive from broker-dealers, clearing organizations and customers		34,399			51,288
Less: Purchases of furniture, equipment and leasehold improvements		(1,930	)		(1,197	)
Less: Capitalization of software development costs		(15,031	)		(13,963	)
Free Cash Flow	$	47,067		$	30,924

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Item 3. Quantitative and Qualitative Disclosures About Market Risk

Market risk is the risk of the loss resulting from adverse changes in market rates and prices, such as interest rates and foreign currency exchange rates.

Market Risk

The global financial services business is, by its nature, risky and volatile and is directly affected by many national and international factors that are beyond our control. Any one of these factors may cause a substantial decline in the U.S. and global financial services markets, resulting in reduced trading volume and revenues. These events could have a material adverse effect on our business, financial condition and results of operations.

As of March 31, 2025, we had $100.2 million of investments in U.S. Treasuries that were classified as trading securities and $55.7 million of investments in corporate bonds that were classified as available-for-sale. Adverse movements, such as a decrease in the value of these securities or a downturn or disruption in the markets for these securities, could result in a substantial loss. A 10.0% decrease in the market value of our U.S Treasuries or available-for-sale investments would result in losses of approximately $10.0 million and $5.6 million, respectively. In addition, principal gains and losses resulting from these securities could on occasion have a disproportionate effect, positive or negative, on our financial condition and results of operations for any particular reporting period.

Interest Rate Risk

Interest rate risk represents our exposure to interest rate changes with respect to our cash and cash equivalents, restricted cash and cash deposits. As of March 31, 2025, our cash and cash equivalents, restricted cash and cash deposits amounted to $644.5 million. A hypothetical 100 basis point change in interest rates would increase or decrease our annual interest income by approximately $6.4 million, assuming no change in the amount or composition of our cash and cash equivalents, restricted cash and cash deposits.

As of March 31, 2025, a hypothetical 100 basis point increase or decrease in interest rates would decrease or increase the fair value of the available-for-sale investment portfolio by approximately $1.0 million, assuming no change in the amount or composition of the investments. The hypothetical unrealized gain or loss of $1.0 million would be recognized in accumulated other comprehensive loss on the Consolidated Statements of Financial Condition.

A similar hypothetical 100 basis point increase or decrease in interest rates would decrease or increase the fair value of the trading securities portfolio by approximately $2.1 million. The hypothetical unrealized gain or loss of $2.1 million would be recognized in other, net in the Consolidated Statements of Operations.

We do not maintain an inventory of bonds that are traded on our platform.

Foreign Currency Exchange Rate Risk

We conduct operations in several different countries outside of the U.S., most notably the U.K., and substantial portions of our revenues, expenses, assets and liabilities are generated and denominated in non-U.S. dollar currencies. Since our consolidated financial statements are presented in U.S. dollars, we must translate revenues, income and expenses, as well as assets and liabilities, into U.S. dollars at exchange rates in effect during or at the end of each reporting period. Accordingly, increases or decreases in the value of the U.S. dollar against the other currencies will affect our net operating revenues, operating expenses, operating income and the value of balance sheet items denominated in foreign currencies.

During the twelve months ended March 31, 2025, approximately 16.1% of our revenues and 25.8% of our expenses were denominated in currencies other than the U.S. dollar, most notably the British Pound Sterling. Based on actual results over the past year, a hypothetical 10.0% increase or decrease in the U.S. dollar against all other currencies would have increased or decreased revenue by approximately $13.1 million and operating expenses by approximately $12.3 million.

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Credit Risk

Through certain of our subsidiaries, we execute securities transactions between our institutional investor and broker-dealer clients on a matched principal basis by serving as counterparty to both the buyer and the seller in trades. Our operating subsidiaries settle such transactions using their self-clearing operations or through the use of third-party clearing brokers or settlement agents. Settlement typically occurs within one to two trading days after the trade date. Cash settlement of the transaction occurs upon receipt or delivery of the underlying instrument that was traded.

We are exposed to credit and performance risks in our role as matched principal trading counterparty to our clients executing bond trades on our platform, including the risk that counterparties that owe us money or securities will not perform their obligations. These parties may default on their obligations to us due to bankruptcy, lack of liquidity, operational failure or other reasons. Adverse movements in the prices of securities that are the subject of these transactions can increase our risk. In connection with Open Trading or other anonymous protocols, we expect that the number of transactions in which we act as a matched principal will increase.

We have policies, procedures and automated controls in place to identify and manage our credit risk. There can be no assurance that these policies, procedures and automated controls will effectively mitigate our credit risk exposure. Some of our risk management procedures are reliant upon the evaluation of information regarding the fixed-income markets, our clients or other relevant matters that are publicly available or otherwise acquired from third-party sources. Such information may not be accurate, complete, up-to-date or properly assessed and interpreted by us. If our risk management procedures fail, our business, financial condition and results of operations may be adversely affected. Furthermore, our insurance policies are unlikely to provide coverage for such risks.

Cash and cash equivalents include cash and money market instruments that are primarily maintained at three major global banks. Given this concentration, we are exposed to certain credit risk in relation to our deposits at these banks.

Derivative Risk

Our limited derivative risk stems from our activities in the foreign currency forward contract market. We use this market to economically hedge our foreign exchange gains and losses on the Consolidated Statements of Operations that arise from our U.S. dollar versus British Pound Sterling exposure from the activities of our U.K. subsidiaries. As of March 31, 2025, the notional amount of our foreign currency forward contract was $62.0 million. We do not hold derivative instruments for purposes other than economically hedging foreign currency risk.

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Item 4. Controls and Procedures

(a) Evaluation of Disclosure Controls and Procedures. Our management, including the Chief Executive Officer and the Chief Financial Officer, evaluated the effectiveness of our “disclosure controls and procedures,” as that term is defined in Rule 13a-15(e) and Rule 15d-15(e) promulgated under the Exchange Act, as of March 31, 2025. Based on that evaluation, the Chief Executive Officer and the Chief Financial Officer concluded that the disclosure controls and procedures are effective to ensure that information required to be disclosed by MarketAxess in the reports that we file or submit under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and forms, and to ensure that information is accumulated and communicated to our management, including the Chief Executive Officer and the Chief Financial Officer, as appropriate to allow timely decisions regarding required disclosure.

(b) Changes in Internal Control over Financial Reporting. There were no changes in our internal control over financial reporting (as defined in Rule 13a-15(f) and Rule 15d-15(f) under the Exchange Act) during the quarter ended March 31, 2025 identified in connection with the evaluation thereof by our management, including the Chief Executive Officer and the Chief Financial Officer, that 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

In the normal course of business, we and our subsidiaries included in the consolidated financial statements may be involved in various lawsuits, proceedings and regulatory examinations. We assess liabilities and contingencies in connection with outstanding legal proceedings, if any, utilizing the latest information available. Based on currently available information, the outcome of our outstanding matters is not expected to have a material adverse impact on our financial position. It is not presently possible to determine our ultimate exposure to these matters and there is no assurance that the resolution of the outstanding matters will not significantly exceed any reserves accrued by us. See Note 13 to the Consolidated Financial Statements for a discussion of our commitments and contingencies.

Item 1A. Risk Factors

There have been no material changes in our risk factors from those disclosed in our most recent Form 10-K for the year ended December 31, 2024. For a discussion of the risk factors affecting the Company, see “Risk Factors” in Part I, Item 1A of our 2024 Form 10-K.

Item 2. Unregistered Sales of Equity Securities and Use of Proceeds

Recent Sales of Unregistered Securities

None.

Issuer Purchases of Equity Securities

During the quarter ended March 31, 2025, we repurchased the following shares of common stock:

Period	Total Number of Shares Purchased		Average Price Paid per Share		Total Number of Shares Purchased as Part of Publicly Announced Plans or Programs		Approximate Dollar Value of Shares That May Yet Be Purchased Under the Plans or Programs
							(In thousands)
January 1, 2025 - January 31, 2025		45,548	$	218.88		22,739	$	220,016
February 1, 2025 - February 28, 2025		104,840		193.21		82,936		204,008
March 1, 2025 - March 31, 2025		83,905		207.10		82,230		186,955
Total		234,293	$	203.17		187,905

During the three months ended March 31, 2025, we repurchased 234,293 shares of common stock. The repurchases included 187,905 shares repurchased in connection with our Repurchase Programs and 46,388 shares surrendered by employees to satisfy the withholding tax obligations upon the vesting of Full Value Awards and upon the exercise of stock options.

In January 2022, our Board of Directors authorized the 2022 Repurchase Program for up to $150.0 million. In August 2024, our Board of Directors authorized the 2024 Repurchase Program for up to an additional $200.0 million. The Repurchase Programs do not have an expiration date. As of March 31, 2025, the 2022 Repurchase Program has been exhausted and we had $187.0 million of remaining capacity under the 2024 Repurchase Program. Shares repurchased under the Repurchase Programs will be held in treasury for future use.

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Item 3. Defaults upon Senior Securities

None.

Item 4. Mine Safety Disclosures

Not applicable.

Item 5. Other Information

(c) Trading Plans

In the first quarter of 2025, no director or officer (as defined in Exchange Act Rule 16a-1(f)) of the Company adopted or terminated a Rule 10b5-1 trading arrangement or non-Rule 10b5-1 trading arrangement for the purchase or sale of securities of the Company, within the meaning of Item 408 of Regulation S-K.

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Item 6. Exhibits

Exhibit Index:

Number	Description
10.1*	Consulting Services Agreement, dated as of February 25, 2025, by and between Richard M. McVey and MarketAxess Holdings Inc.#
10.2*	Form of 2025 Restricted Stock Unit Agreement (Non-Deferred) for U.S.-based executive officers pursuant to the MarketAxess Holdings Inc. 2020 Equity Incentive Plan
10.3*	Form of 2025 Restricted Stock Unit Agreement (Non-Deferred) for Richard M. McVey pursuant to the MarketAxess Holdings Inc. 2020 Equity Incentive Plan
10.4*	Form of 2025 Performance Stock Unit Agreement for U.S.-based executive officers pursuant to the MarketAxess Holdings Inc. 2020 Equity Incentive Plan†
10.5*	Form of 2025 Incentive Stock Option Agreement for U.S.-based executive officers pursuant to the MarketAxess Holdings Inc. 2020 Equity Incentive Plan
10.6*	Form of 2025 Restricted Stock Unit Agreement for U.K.-based executive officers pursuant to the MarketAxess Holdings Inc. 2020 Equity Incentive Plan
10.7*	Form of 2025 Performance Stock Unit Agreement for U.K.-based executive officers pursuant to the MarketAxess Holdings Inc. 2020 Equity Incentive Plan†
31.1*	Certification by Chief Executive Officer pursuant to Exchange Act Rule 13a-14(a), as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
31.2*	Certification by Chief Financial Officer pursuant to Exchange Act Rule 13a-14(a), as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
32.1*	Certification by Chief Executive Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
32.2*	Certification by Chief Financial Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
101.INS*	Inline XBRL Instance Document - the instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL Document
101.SCH*	Inline XBRL Taxonomy Extension Schema Document
104	The cover page from the Company’s Quarterly report on Form 10-Q for the quarter ended March 31, 2025 has been formatted in Inline XBRL and is included in Exhibits 101.

*	Filed herewith.
#	Certain confidential information, identified by bracketed asterisks “[*****]” has been omitted from this exhibit pursuant to Item 601(b)(10) of Regulation S-K because it is both (i) not material and (ii) is the type that the registrant treats as private or confidential.
†	Certain schedules and other similar attachments to this exhibit have been omitted from this filing pursuant to Item 601(a)(5) of Regulation S-K. The registrant will provide a copy of such omitted documents to the Securities and Exchange Commission upon request.

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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.

	MARKETAXESS HOLDINGS INC.
Date: May 7, 2025	By:	/s/ CHRISTOPHER R. CONCANNON
		Christopher R. Concannon
		Chief Executive Officer
		(principal executive officer)

Date: May 7, 2025	By:	/s/ ILENE FISZEL BIELER
		Ilene Fiszel Bieler
		Chief Financial Officer
		(principal financial officer)

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EX-10.1

Exhibit 10.1

CERTAIN CONFIDENTIAL INFORMATION, IDENTIFIED BY BRACKETED ASTERISKS “[*****]”, HAS BEEN OMITTED FROM THIS EXHIBIT BECAUSE IT IS BOTH (I) NOT MATERIAL AND (II) IS THE TYPE THAT THE REGISTRANT TREATS AS PRIVATE OR CONFIDENTIAL.

CONSULTING SERVICES AGREEMENT

This agreement (hereinafter referred to as the “Agreement”), dated February 25, 2025, is for Consulting Services (the “Consulting Services”), described in the attached Exhibit A, which is part of this Agreement, to be provided by Richard M. McVey (the “Consultant”), located at [*****] to MarketAxess Holdings Inc., located at 55 Hudson Yards, New York, NY 10001, as well as its subsidiaries, affiliates, and parents (collectively, “MarketAxess” or the “Company”). Consultant previously served as an employee of the Company pursuant to a letter agreement between Consultant and MarketAxess dated January 6, 2023 (the “Employment Letter Agreement”), with December 31, 2024 (the “Separation Date”) serving as his last day of service as an employee.

1.Term. The term of this Agreement will begin on January 1, 2025 and will continue in effect until February 28, 2027 (the “Term”), unless terminated in advance as follows: (i) at any time upon the mutual written consent of the parties hereto; (ii) by MarketAxess, for Cause (as defined below), immediately upon written notice to Consultant; (iii) by MarketAxess, for any other reason, upon five (5) days’ written notice to Consultant; or (iv) by Consultant for any reason, upon five (5) days’ written notice to MarketAxess. The Term may be extended upon mutual agreement of the parties in writing. If MarketAxess terminates the Agreement pursuant to (iii) above, notwithstanding anything to the contrary in the Employment Letter Agreement or any equity award agreement, any outstanding equity or equity-based incentive awards held by Consultant under any Company equity incentive plans that are not vested as of the termination date of this Agreement shall vest as follows: (A) any such award subject solely to time- or service-based vesting shall continue to become vested, exercisable and payable on the same schedule as if Consultant had remained actively providing service to the Company, and (B) any such award subject to performance-based vesting shall continue to become vested, exercisable and payable on the same schedule as if the Consultant had remained actively providing service to the Company based on actual performance. Consultant’s outstanding equity awards shall otherwise be subject to the same terms and conditions that apply under the applicable equity plan and award agreements. “Cause” shall mean (A) Consultant’s willful misconduct or gross negligence in the performance of Consultant’s duties under this Agreement that is not cured by Consultant within thirty (30) days after Consultant’s receipt of written notice given to Consultant by the Company, (B) Consultant’s conviction of, or plea of guilty or nolo contendere to, a crime relating to the Company or any affiliate or any felony, or (C) a material breach by Consultant of this Agreement, any other material written agreement entered into between Consultant and the Company or any material written policy of the Company signed by Consultant, including without limitation the Code of Conduct, as well as policies related to workplace conduct and sexual harassment, in each case that is not cured by Consultant within thirty (30) days after Consultant’s receipt of written notice given to Consultant by the Company.

2.Consulting Services. During the Term, the Consultant agrees to perform the Consulting Services, based on his specialized knowledge and expertise, as an independent contractor. The

Company shall have no right to, and shall not, control the manner or prescribe the method the Consultant uses to complete the Consulting Services. The Consultant shall be solely responsible for determining the most effective and efficient manner to perform such services, provided that the Consultant agrees to perform the Consulting Services in a competent and professional manner with promptness and diligence in accordance with (i) all applicable United States federal, state, and local laws, rules, and regulations, and (ii) industry standard. The Consultant agrees to provide the Consulting Services as requested by the Company with respect to various matters falling within the Consultant’s expertise, as described in Exhibit A of this Agreement. As requested by the Chairperson of the Company’s Board of Directors, Consultant agrees to be reasonably available for virtual meetings with such Chairperson to provide the Consulting Services. Such meetings may be in-person if both Consultant and Chairperson agree.

3.Consulting Fees. Unless otherwise negotiated and agreed upon by the parties in writing, as payment for the provision of the Consulting Services, during the Term of this Agreement, the Company will pay to the Consultant an annual fee of $50,000.00, to be paid on a quarterly basis in arrears.

4.Consultant’s Equipment and Personnel. The Consultant shall be responsible for providing, solely at the Consultant’s expense, all equipment and supplies needed to perform the Consulting Services, including a computer, computer accessories and general office supplies. The Consultant shall be solely responsible for all costs and expenses of doing business, including all wages and other compensation for any employees, agents, or subcontractors the Consultant engages or hires, and all taxes and other business expenses that may be incurred in connection with the Consultant’s performance of services under this Agreement.

5.Independent Contractor Relationship; Non-Exclusive Arrangement. Nothing under this Agreement shall be construed as creating any partnership, joint venture or agency between the Company and the Consultant. The Consultant shall act solely as an independent contractor and, as such, is not authorized to bind the Company to third parties. The parties recognize that both the Consultant and the Company are, or may be, engaged in similar agreements with others. Nothing in this Agreement shall prevent or preclude the Consultant from performing services for any other company, customer, or client, subject to Section 8 of this Agreement and any continuing obligations to the Company that Consultant may have pursuant to any other written agreement with the Company.

6.Taxes. The Company shall report all payments made to the Consultant on a calendar year basis using an appropriate IRS Form 1099, if the volume of payments to the Consultant qualify. The Consultant agrees to report all such payments to the appropriate federal, state, and local taxing authorities. Neither federal, state, nor local taxes of any kind shall be withheld or paid by the Company on behalf of the Consultant in connection with payments made by the Company under Section 3 hereof. The Consultant shall be responsible for determining the amounts of and making all applicable tax payments. The Consultant shall indemnify, defend and hold the Company, its officers, directors, agents, employees, contractors and shareholders harmless from and against any and all claims, liabilities, losses, damages, costs and expenses (including, without limitation, attorneys’ fees and expenses) arising out of or relating to the foregoing responsibility of the Consultant.

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7.No Benefits. The Consultant is not an employee of the Company and, except as permitted by COBRA, is not entitled to participate in any of the Company’s employee benefit plans, including, but not limited to, any retirement, pension, profit sharing, group insurance, health insurance or similar plans that have been or may be instituted by MarketAxess for the benefit of its employees.

8.Confidential Information and Acceptable Use.

(a) During the course of Consultant’s engagement hereunder, the Consultant may receive confidential information of and/or be in the possession of confidential information that is marked as confidential or that Consultant should reasonably understand to be confidential or proprietary from the Company, its parent, subsidiaries, and/or any affiliated companies (collectively, “Affiliates”), including, but not limited to, customer lists, client information, services provided to such clients, trade secrets, images, slogans, logos, designs, sketches, mock-ups, samples, concepts, ideas, inventions, original works of authorship, discoveries, techniques, copyrights, patents, trademarks, computer software and any and all information and know-how now or in the future, whether or not such confidential information relates to any Work Product (as defined below), including without limitation, the underlying concept and production methodology of such Work Product (hereinafter, “Confidential Information”). Consultant acknowledges and agrees that it has no claim, right, title, property or other interest of any kind in the Confidential Information. The Consultant shall hold and maintain the Confidential Information in strictest confidence and in trust for the Company's and its Affiliates’ sole and exclusive benefit. The Consultant agrees to keep all Confidential Information in a secure place and further agrees not to publish, communicate, divulge, use or disclose, directly or indirectly, for its own benefit or for the benefit of another, or for any purpose other than in furtherance of the Consultant’s contractual obligations hereunder, either during or after its engagement as a consultant hereunder, any Confidential Information. Consultant shall not discuss or disclose any Confidential Information with or to any person whatsoever, or permit any person whatsoever to examine and/or make copies of any Work Product, except as required to perform the Consulting Services or as requested by law. Upon termination of this Agreement or upon the earlier request of the Company, the Consultant shall deliver all written and/or recorded material, including without limitation, paper, film, cards, tapes, discs and the storage facilities, in Consultant's possession, custody or control which contain any Work Product and/or Confidential Information, and all copies thereof, to the Company.

(b) If the Consultant is requested or required by any court, agency or other governmental authority to disclose any Confidential Information, it shall promptly notify the Company so as to permit the Company to seek a protective order or take other appropriate action. If, in the absence of a protective order, the Consultant is compelled as a matter of law to disclose any Confidential Information, the Consultant shall disclose to the party compelling disclosure only such part of the Confidential Information as is required by law to be disclosed. The Consultant shall exercise its best efforts to obtain assurances that confidential treatment shall be accorded Confidential Information disclosed under such circumstances. Nothing in this Agreement shall prohibit Consultant from making reports of possible violations of law or regulation to a governmental agency or other entity, including, but not limited to the Securities and Exchange Commission, the Financial Industry Regulatory Authority, the Commodity

3

Futures Trading Commission, the Consumer Financial Protection Bureau, the Occupational Safety and Health Administration, the Department of Justice, the U.S. Congress, any agency Inspector General, the U.S. Equal Employment Opportunity Commission, the National Labor Relations Board, the New York State Division on Human Rights, the New York City Commission on Human Rights, or any other state or local commission on human rights or agency enforcing anti-discrimination laws, or require notification or prior approval by the Company of the same.

(c) Pursuant to the Defend Trade Secrets Act of 2016, an individual may not be held criminally or civilly liable under any federal or state trade secret law for the disclosure of a trade secret that: (A) is made (i) in confidence to a federal, state, or local government official, either directly or indirectly, or to an attorney; and (ii) solely for the purpose of reporting or investigating a suspected violation of law; or (B) is made in a complaint or other document that is filed under seal in a lawsuit or other proceeding. Further, an individual who files a lawsuit for retaliation for reporting a suspected violation of law may disclose the Company's trade secrets to the attorney and use the trade secret information in the court proceeding if the individual: (A) files any document containing the trade secret under seal; and (B) does not disclose the trade secret, except pursuant to court order.

(d) The Consultant acknowledges that the Confidential Information is particularly sensitive and of substantial importance to the Company; accordingly, the Consultant agrees that the provisions of this Section 8 shall survive any termination of this Agreement and shall be enforceable against the Consultant in perpetuity.

(e) The Consultant acknowledges it will have access to Confidential Information. If the Company so elects, it shall be entitled, in addition to all other remedies available, to enjoin the violation by Consultant of any provision hereof.

9.Intellectual Property.

(a) The parties hereby agree that the Company shall own all right, title and interest throughout the world in and to any and all inventions, original works of authorship, developments, concepts, know-how, improvements, and trade secrets, whether or not patentable or registrable under copyright or similar laws, that Consultant may solely or jointly conceive or develop or reduce to practice, or cause to be conceived or developed or reduced to practice during Consultant’s engagement hereunder, (collectively referred to as “Work Product”). The term “Work Product” does not include any invention that Consultant developed entirely on Consultant’s own time without using the Company’s equipment supplies, facilities, or trade secret information, except for those inventions that either: (1) relate at the time of conception or development (a) to the Company’s business, or (b) to the Company’s actual or demonstrably anticipated research or development; or (2) result from any work performed by Consultant for the Company.

(b) Consultant hereby assigns to MarketAxess all right, title, and interest in and to any and all Work Product, and agrees to assist the Company, at MarketAxess’ expense, to further evidence, record, and perfect such assignments, and to perfect, obtain, maintain, enforce, and defend any rights specified to be so owned or assigned. In addition to, and not in contravention

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of any of, the foregoing, Consultant acknowledges that all original works of authorship that are made by Consultant (solely or jointly with others) within the scope of this engagement and that are protectable by copyright are “works made for hire,” as that term is defined in the United States Copyright Act (17 U.S.C. § 101).

10.No-Conflicts. The Consultant represents and warrants to the Company that it is not subject to any contractual or other restriction or obligation which is inconsistent with any representation, obligation or assignment of Consultant, any rights of the Company under this Agreement or Consultant’s acceptance of engagement with or performance of the Consulting Services. This provision shall not be construed as preventing the Consultant from engaging in any other business activities, including competing business activities, so long as they do not violate this provision.

11.Waiver. Without waiving the Consultant’s right to seek direct damages in connection with any dispute under this Agreement, the Consultant waives any claim, right or entitlement to punitive damages, indirect damages or consequential damages in connection with any dispute under this Agreement.

12.Notices. All notices and other communications hereunder shall be in writing and shall be sent by e-mail to the e-mail address set forth below:

If to the Company:If to the Consultant:

MarketAxess Holdings Inc. Richard M. McVey

55 Hudson Yards 15th Floor [*****]

New York, NY 10001 [*****]

Email: LegalNY@marketaxess.comEmail: [*****]

Each party hereto may designate in writing a new e-mail address to which any notice or other communication may thereafter be so given, served or sent. Each notice or other communication sent by e-mail shall be deemed given, served, sent or received for all purposes on the date of transmission, provided no “bounceback” or similar notice of non-delivery is received.

13.Assignment. This Agreement may not be assigned, transferred or subcontracted, in whole or in part, by the Consultant. However, nothing in this provision shall limit or restrict the Consultant from engaging or hiring others to assist the Consultant in performing the Consulting Services contemplated by this Agreement. The Company may assign this Agreement to any successors or assigns, and Consultant shall be bound to any successor or assign of the Company.

14.Governing Law. This Agreement shall be governed by and construed in accordance with the laws of the State of New York without regard to conflicts of law principles.

15.Forum Selection.Consultant irrevocably and unconditionally (i) agrees that any suit, action or other legal proceeding arising out of this Agreement shall be brought in a United States District Court in the Southern District of New York, or if such court does not have jurisdiction or will

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not accept jurisdiction, in any court of general jurisdiction in New York, (ii) consents to the non-exclusive jurisdiction of any such court in any such suit, action or proceeding, and (iii) waives any objection which Consultant may have to the laying of venue of any such suit, action or proceeding in any such court.

16.Service. The Consultant and the Company agree that service of process in any action or proceeding brought: (a) by the Company or any Affiliate against the Consultant may be made upon the Consultant by mailing a copy of the same to him/her at the address set forth herein; and (b) by the Consultant against the Company may be made by mailing a copy of the same to it at the address set forth herein.

17.The parties agree that the Separation Date will be treated as a “separation from service” for purposes of Section 409A of the Internal Revenue Code. In no event shall the Consulting Services exceed a number of hours per month that would result in Consultant providing greater than twenty percent (20%) of the average number of hours Consultant was providing bona fide services to the Company in the 36-month period prior to the Separation Date (the “Period”). For the avoidance of doubt, it is assumed that Consultant provided approximately 32 hours of service to the Company per week during the Period.

18.Entire Agreement; Modification; Waiver. This Agreement sets forth the entire understanding and agreement of the parties hereto relating to the retention of the Consultant by the Company, and all other previous or contemporaneous understandings or agreements relating to the retention of the Consultant by the Company, whether written or oral, are hereby superseded. None of the terms or provisions hereof shall be modified or waived, and this Agreement may not be amended or terminated, except by a written instrument signed by the party against which modification, waiver, amendment or termination is to be enforced. No waiver of any one provision shall be construed as a waiver of any other provision and the fact that an obligation is waived for a period of time shall not be considered to be a continuous waiver.

19.Headings. Headings appearing in this Agreement are for convenience only and do not in any way limit, amplify, modify, or otherwise affect the terms and provisions of this Agreement.

20.Savings Clause. If any provision of this Agreement shall be determined to be invalid, illegal, or unenforceable, either in whole or in part this Agreement shall be deemed amended to delete or modify, as necessary, the offending provisions and to alter the balance of this Agreement in order to render the same valid, legal and enforceable to the fullest extent permissible.

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The parties enter into and execute this Agreement on the dates set forth below.

ACCEPTED AND AGREED TO:

By: /s/ Richard M. McVey____________	2/25/2025
Richard M. McVey	Date

MarketAxess Holdings Inc.

By: /s/ Christopher R. Concannon	2/25/2025
Name: Christopher R. Concannon	Date
Title: Chief Executive Officer

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EXHIBIT A

The Consulting Services shall include:

Advisory services regarding fixed-income market structure, corporate strategy and global regulatory framework applicable to the Company’s services.

EX-10.2

Exhibit 10.2

Form of 2025 Restricted Stock Unit Agreement (Non-Deferred)

for U.S. based Executive Officers

RESTRICTED STOCK UNIT AGREEMENT
PURSUANT TO THE
MARKETAXESS HOLDINGS INC. 2020 EQUITY
INCENTIVE PLAN

THIS RESTRICTED STOCK UNIT AGREEMENT (this “Agreement”), is made as of [Award Date] (the “Grant Date”) by and between MarketAxess Holdings Inc. (the “Company”) and [xxx] (the “Participant”).

WHEREAS, the Board of Directors of the Company (the “Board”) adopted The MarketAxess Holdings Inc. 2020 Equity Incentive Plan (as may be amended and/or restated from time to time) (the “Plan”) which is administered by a Committee appointed by the Company’s Board of Directors (the “Committee”);

WHEREAS, pursuant to Section 3.2 of the Plan, the Committee has adopted guidelines (the “Guidelines”) for the grant of restricted stock units (“RSUs”) under the Plan; and

WHEREAS, the Company, through the Committee, wishes to grant to the Participant RSUs as set forth below.

NOW, THEREFORE, the Company and the Participant agree as follows:

1.Grant of RSUs. Subject to the terms and conditions of the Plan, the Guidelines and this Agreement, on the Grant Date the Company awarded to the Participant [xxx] RSUs. The RSUs hereunder are not Deferrable RSUs and are not eligible for deferral under Section 4 of the Guidelines.

2.Vesting. Unless otherwise set forth in an agreement between the Participant and the Company, the RSUs shall become vested pursuant to the terms of this Agreement and the Plan on the dates set forth below (which constitute the “Original Vesting Schedule”) if the Participant has been continuously providing service to the Company until such date.

[xxx] on [vest date 1]
[xxx] on [vest date 2]
[xxx] on [vest date 3]

There shall be no proportionate or partial vesting in the periods prior to the applicable vesting dates and all vesting shall occur only on the appropriate vesting date.

If a Qualified Retirement occurs, any remaining unvested RSUs granted hereunder shall be settled in Common Stock within 30 days following the date such unvested RSUs would have otherwise vested in accordance with the Original Vesting Schedule, regardless of whether the Participant continues to provide services to the Company; provided that if,

prior to the last vesting date set forth in the Original Vesting Schedule, the Participant undertakes any business activity or employment in the financial services or fintech industries without the prior written consent of the Company or breaches any of the terms and conditions of the Restrictive Covenants, any RSUs which have not yet been settled will be forfeited immediately for no consideration.

A “Qualified Retirement” shall occur upon the first date on which all the following criteria have been satisfied: (i) the Participant is at least fifty-eight (58) years old, (ii) the Participant has at least ten (10) continuous years of service with the Company, (iii) the Participant has given to the Company twelve (12) months’ advance notice of the Participant’s intent to cease providing services to the Company and comply with the Restrictive Covenants, and (iv) such twelve (12) month period has elapsed; provided, that the Participant has not voluntarily stopped providing service to the Company through such twelve (12) month period.

“Restrictive Covenants” shall mean any written post-termination of employment covenants between the Participant and the Company or any of its affiliates prohibiting or restricting competition, the solicitation of clients or employees or the sharing of confidential information, including any such covenants set forth in a Proprietary Information and Non-Competition Agreement; provided, however; for purposes of this Agreement, the term of such Restrictive Covenants shall be deemed to extend to the last vesting date set forth in the Original Vesting Schedule.

3.Forfeiture.Notwithstanding anything else set forth herein, this grant of RSU’s, and any of Participant’s rights and benefits with respect to this Agreement (including all unvested RSUs and vested but unpaid RSUs), shall be immediately forfeited upon the Company’s determination that Participant: (i) has violated any laws, regulations or material Company policies, (ii) breached any written agreement with the Company, including any Restrictive Covenants that may apply to the Participant t or (iii) engaged in any other conduct that is detrimental to the business or reputation of the Company.

4.Securities Representations. The grant of the RSUs and any issuance of shares of Common Stock pursuant to this Agreement are being made by the Company in reliance upon the following express representations and warranties of the Participant.

The Participant acknowledges, represents and warrants that:

(a)he or she has been advised that he or she may be an “affiliate” within the meaning of Rule 144 under the Securities Act and in this connection the Company is relying in part on his or her representations set forth in this section;

(b)if he or she is deemed an affiliate within the meaning of Rule 144 of the Securities Act, the Common Stock must be held indefinitely unless an exemption from any applicable resale restrictions is available or the Company files an additional registration statement (or a “re-offer prospectus”) with regard to such Common Stock and the Company is under no obligation to register the Common Stock (or to file a “re-offer prospectus”);

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(c)if he or she is deemed an affiliate within the meaning of Rule 144 of the Securities Act, he or she understands that the exemption from registration under Rule 144 will not be available unless (i) a public trading market then exists for the Common Stock, (ii) adequate information concerning the Company is then available to the public, and (iii) other terms and conditions of Rule 144 or any exemption therefrom are complied with; and that any sale of the Common Stock may be made only in limited amounts in accordance with such terms and conditions.

5.Not an Employment or Service Agreement. Neither the execution of this Agreement nor the grant of RSUs hereunder constitute an agreement by the Company to employ or retain or to continue to employ or retain the Participant during the entire, or any portion of, the term of this Agreement.

6.Miscellaneous.

(a)This Agreement shall inure to the benefit of and be binding upon the parties hereto and their respective heirs, personal legal representatives, successors, trustees, administrators, distributees, devisees and legatees. The Company may assign to, and require, any successor (whether direct or indirect, by purchase, merger, consolidation or otherwise) to all or substantially all of the business and/or assets of the Company or any affiliate by which the Participant is employed to expressly assume and agree in writing to perform this Agreement. Notwithstanding the foregoing, the Participant may not assign this Agreement.

(b)This award of RSUs shall not affect in any way the right or power of the Board or stockholders of the Company to make or authorize an adjustment, recapitalization or other change in the capital structure or the business of the Company, any merger or consolidation of the Company or subsidiaries, any issue of bonds, debentures, preferred or prior preference stock ahead of or affecting the Common Stock, the dissolution or liquidation of the Company, any sale or transfer of all or part of its assets or business or any other corporate act or proceeding.

(c)The Participant agrees that the award of the RSUs hereunder is special incentive compensation and that it, any dividends paid thereon (even if treated as compensation for tax purposes) will not be taken into account as “salary” or “compensation” or “bonus” in determining the amount of any payment under any pension, retirement or profit-sharing plan of the Company or any life insurance, disability or other benefit plan of the Company.

(d)No modification or waiver of any of the provisions of this Agreement shall be effective unless in writing and signed by the party against whom it is sought to be enforced.

(e)This Agreement may be executed in one or more counterparts, all of which taken together shall constitute one contract.

(f)The failure of any party hereto at any time to require performance by another party of any provision of this Agreement shall not affect the right of such party to require

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performance of that provision, and any waiver by any party of any breach of any provision of this Agreement shall not be construed as a waiver of any continuing or succeeding breach of such provision, a waiver of the provision itself, or a waiver of any right under this Agreement.

(g)The headings of the sections of this Agreement have been inserted for convenience of reference only and shall in no way restrict or modify any of the terms or provisions hereof.

(h)All notices, consents, requests, approvals, instructions and other communications provided for herein shall be in writing and validly given or made when delivered, or on the second succeeding business day after being mailed by registered or certified mail, whichever is earlier, to the persons entitled or required to receive the same, at the addresses set forth at the heading of this Agreement or to such other address as either party may designate by like notice. Notices to the Company shall be addressed to the Compensation Committee of the Board with a copy to General Counsel, MarketAxess Holdings Inc., 55 Hudson Yards, 15th Floor, New York, NY 10001.

(i)This Agreement shall be construed, interpreted and governed and the legal relationships of the parties determined in accordance with the internal laws of the State of Delaware without reference to rules relating to conflicts of law.

7.Provisions of Plan and Guidelines Control. This Agreement is subject to all the terms, conditions and provisions of the Plan and the Guidelines, including, without limitation, the amendment provisions thereof, and to such rules, regulations and interpretations relating to the Plan and the Guidelines as may be adopted by the Committee and as may be in effect from time to time. The Plan and the Guidelines are incorporated herein by reference. A copy of the Plan and the Guidelines have been delivered to the Participant. If and to the extent that this Agreement conflicts or is inconsistent with the terms, conditions and provisions of the Plan and the Guidelines, the Plan and the Guidelines shall control, and this Agreement shall be deemed to be modified accordingly. Unless otherwise indicated, any capitalized term used but not defined herein shall have the meaning ascribed to such term in the Plan or the Guidelines. This Agreement contains the entire understanding of the parties with respect to the subject matter hereof (other than any other documents expressly contemplated herein or in the Plan or the Guidelines) and supersedes any prior agreements between the Company and the Participant.

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IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be duly executed as of the day and year first above written.

MARKETAXESS HOLDINGS INC.

[Name]

[Title]

PARTICIPANT

[Name]

5

EX-10.3

Exhibit 10.3

Form of 2025 Restricted Stock Unit Agreement

(Non-Deferred) for Mr. McVey

RESTRICTED STOCK UNIT AGREEMENT
PURSUANT TO THE
MARKETAXESS HOLDINGS INC. 2020 EQUITY
INCENTIVE PLAN

THIS RESTRICTED STOCK UNIT AGREEMENT (this “Agreement”), is made as of [Award Date] (the “Grant Date”) by and between MarketAxess Holdings Inc. (the “Company”) and [xxx] (the “Participant”).

WHEREAS, the Board of Directors of the Company (the “Board”) adopted The MarketAxess Holdings Inc. 2020 Equity Incentive Plan (as may be amended and/or restated from time to time) (the “Plan”) which is administered by a Committee appointed by the Company’s Board of Directors (the “Committee”);

WHEREAS, pursuant to Section 3.2 of the Plan, the Committee has adopted guidelines (the “Guidelines”) for the grant of restricted stock units (“RSUs”) under the Plan; and

WHEREAS, the Company, through the Committee, wishes to grant to the Participant RSUs as set forth below.

NOW, THEREFORE, the Company and the Participant agree as follows:

1.Grant of RSUs. Subject to the terms and conditions of the Plan, the Guidelines and this Agreement, on the Grant Date the Company awarded to the Participant [xxx] RSUs. The RSUs hereunder are not Deferrable RSUs and are not eligible for deferral under Section 4 of the Guidelines.

2.Vesting. Unless otherwise set forth in an agreement between the Participant and the Company, the RSUs shall become vested pursuant to the terms of this Agreement and the Plan on the dates set forth below (which constitute the “Original Vesting Schedule”) if the Participant has been continuously providing service to the Company until such date.

[xxx] on [vest date 1]
[xxx] on [vest date 2]
[xxx] on [vest date 3]

There shall be no proportionate or partial vesting in the periods prior to the applicable vesting dates and all vesting shall occur only on the appropriate vesting date.

3.Forfeiture.Notwithstanding anything else set forth herein, this grant of RSU’s, and any of Participant’s rights and benefits with respect to this Agreement (including all unvested RSUs and vested but unpaid RSUs), shall be immediately forfeited upon the Company’s determination that Participant: (i) has violated any laws, regulations or material Company

policies, (ii) breached any written agreement with the Company, including any Restrictive Covenants that may apply to the Participant or (iii) engaged in any other conduct that is detrimental to the business or reputation of the Company.

“Restrictive Covenants” shall mean any written post-termination of employment covenants between the Participant and the Company or any of its Affiliates prohibiting or restricting competition, the solicitation of clients or employees or the sharing of confidential information, including any such covenants set forth in a Proprietary Information and Non-Competition Agreement.

4.Securities Representations. The grant of the RSUs and any issuance of shares of Common Stock pursuant to this Agreement are being made by the Company in reliance upon the following express representations and warranties of the Participant.

The Participant acknowledges, represents and warrants that:

(a)he or she has been advised that he or she may be an “affiliate” within the meaning of Rule 144 under the Securities Act and in this connection the Company is relying in part on his or her representations set forth in this section;

(b)if he or she is deemed an affiliate within the meaning of Rule 144 of the Securities Act, the Common Stock must be held indefinitely unless an exemption from any applicable resale restrictions is available or the Company files an additional registration statement (or a “re-offer prospectus”) with regard to such Common Stock and the Company is under no obligation to register the Common Stock (or to file a “re-offer prospectus”);

(c)if he or she is deemed an affiliate within the meaning of Rule 144 of the Securities Act, he or she understands that the exemption from registration under Rule 144 will not be available unless (i) a public trading market then exists for the Common Stock, (ii) adequate information concerning the Company is then available to the public, and (iii) other terms and conditions of Rule 144 or any exemption therefrom are complied with; and that any sale of the Common Stock may be made only in limited amounts in accordance with such terms and conditions.

5.Not an Employment or Service Agreement. Neither the execution of this Agreement nor the grant of RSUs hereunder constitute an agreement by the Company to employ or retain or to continue to employ or retain the Participant during the entire, or any portion of, the term of this Agreement.

6.Miscellaneous.

(a)This Agreement shall inure to the benefit of and be binding upon the parties hereto and their respective heirs, personal legal representatives, successors, trustees, administrators, distributees, devisees and legatees. The Company may assign to, and require, any successor (whether direct or indirect, by purchase, merger, consolidation or otherwise) to all or substantially all of the business and/or assets of the Company or any affiliate by which the Participant is employed to expressly

2

assume and agree in writing to perform this Agreement. Notwithstanding the foregoing, the Participant may not assign this Agreement.

(b)This award of RSUs shall not affect in any way the right or power of the Board or stockholders of the Company to make or authorize an adjustment, recapitalization or other change in the capital structure or the business of the Company, any merger or consolidation of the Company or subsidiaries, any issue of bonds, debentures, preferred or prior preference stock ahead of or affecting the Common Stock, the dissolution or liquidation of the Company, any sale or transfer of all or part of its assets or business or any other corporate act or proceeding.

(c)The Participant agrees that the award of the RSUs hereunder is special incentive compensation and that it, any dividends paid thereon (even if treated as compensation for tax purposes) will not be taken into account as “salary” or “compensation” or “bonus” in determining the amount of any payment under any pension, retirement or profit-sharing plan of the Company or any life insurance, disability or other benefit plan of the Company.

(d)No modification or waiver of any of the provisions of this Agreement shall be effective unless in writing and signed by the party against whom it is sought to be enforced.

(e)This Agreement may be executed in one or more counterparts, all of which taken together shall constitute one contract.

(f)The failure of any party hereto at any time to require performance by another party of any provision of this Agreement shall not affect the right of such party to require performance of that provision, and any waiver by any party of any breach of any provision of this Agreement shall not be construed as a waiver of any continuing or succeeding breach of such provision, a waiver of the provision itself, or a waiver of any right under this Agreement.

(g)The headings of the sections of this Agreement have been inserted for convenience of reference only and shall in no way restrict or modify any of the terms or provisions hereof.

(h)All notices, consents, requests, approvals, instructions and other communications provided for herein shall be in writing and validly given or made when delivered, or on the second succeeding business day after being mailed by registered or certified mail, whichever is earlier, to the persons entitled or required to receive the same, at the addresses set forth at the heading of this Agreement or to such other address as either party may designate by like notice. Notices to the Company shall be addressed to the Compensation Committee of the Board with a copy to General Counsel, MarketAxess Holdings Inc., 55 Hudson Yards, 15th Floor, New York, NY 10001.

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(i)This Agreement shall be construed, interpreted and governed and the legal relationships of the parties determined in accordance with the internal laws of the State of Delaware without reference to rules relating to conflicts of law.

7.Provisions of Plan and Guidelines Control. This Agreement is subject to all the terms, conditions and provisions of the Plan and the Guidelines, including, without limitation, the amendment provisions thereof, and to such rules, regulations and interpretations relating to the Plan and the Guidelines as may be adopted by the Committee and as may be in effect from time to time. The Plan and the Guidelines are incorporated herein by reference. A copy of the Plan and the Guidelines have been delivered to the Participant. If and to the extent that this Agreement conflicts or is inconsistent with the terms, conditions and provisions of the Plan and the Guidelines, the Plan and the Guidelines shall control, and this Agreement shall be deemed to be modified accordingly. Unless otherwise indicated, any capitalized term used but not defined herein shall have the meaning ascribed to such term in the Plan or the Guidelines. This Agreement contains the entire understanding of the parties with respect to the subject matter hereof (other than any other documents expressly contemplated herein or in the Plan or the Guidelines) and supersedes any prior agreements between the Company and the Participant.

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IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be duly executed as of the day and year first above written.

MARKETAXESS HOLDINGS INC.

[Name]

[Title]

PARTICIPANT

[Name]

5

EX-10.4

Exhibit 10.4

Form of 2025 Performance Stock Unit Agreement

for U.S. Based Executive Officers

PERFORMANCE STOCK UNIT AGREEMENT
PURSUANT TO THE
MARKETAXESS HOLDINGS INC. 2020 EQUITY
INCENTIVE PLAN

THIS PERFORMANCE STOCK UNIT AGREEMENT (this “Agreement”), is made as of [Award Date] (the “Grant Date”) by and between MarketAxess Holdings Inc. (the “Company”) and [Participant] (the “Participant”).

WHEREAS, the Board of Directors of the Company (the “Board”) adopted The MarketAxess Holdings Inc. 2020 Equity Incentive Plan (as may be amended and/or restated from time to time) (the “Plan”) which is administered by a Committee appointed by the Company’s Board of Directors (the “Committee”);

WHEREAS, pursuant to Section 3.2 of the Plan, the Committee has adopted guidelines (the “Guidelines”) for the grant of restricted stock units under the Plan; and

WHEREAS, the Company, through the Committee, wishes to grant to the Participant performance vesting restricted stock units (“PSUs”) that are eligible to vest upon the achievement of the performance metric(s) set forth on Appendix A attached hereto and subject to the Participant’s continuing service with the Company or an Affiliate through the date set forth herein.

NOW, THEREFORE, the Company and the Participant agree as follows:

1.Grant of Performance Stock Unit. Subject to the terms and conditions of the Plan, the Guidelines and this Agreement, on the Grant Date the Company awarded to the Participant [XXX] PSUs. The PSUs are not eligible for deferral under Section 4 of the Guidelines.

2.Vesting. (a) Unless otherwise set forth in an agreement between the Participant and the Company, the number of PSUs that vest, if any, shall be determined by the level of attainment of the performance metric during the performance period in accordance with Appendix A attached hereto, subject to the Participant continuously providing services to the Company or its Affiliates through February 15, 2028. The Committee shall certify the level of achievement of the performance metric no later than thirty (30) days following the Committee’s receipt of audited financial statements for the last year of the applicable performance period.

(b)Unless otherwise set forth in an individual employment or severance agreement between the Participant and the Company, the Plan or the Guidelines, or in connection with a “Qualified Retirement,” as defined below, if the Participant incurs a termination of service for any reason at any time prior to February 15, 2028, the Participant shall forfeit any unvested PSUs as of the date of termination of service.

If a Qualified Retirement occurs, PSUs granted hereunder shall remain eligible to vest in accordance with this Section 2, regardless of whether the Participant continues to provide services to the Company or its Affiliates; provided that if, prior to the date such PSUs vest, the Participant (i) undertakes any business activity or employment in the financial services

or fintech industries or undertakes any activity that could create reputational risk or a conflict of interest with the Company (in each case, as determined by the Company in its sole discretion) without the prior written consent of the Company or (ii) breaches any of the terms and conditions of the Restrictive Covenants, all unvested PSUs will be forfeited immediately for no consideration.

A “Qualified Retirement” shall occur upon the first date on which all the following criteria have been satisfied: (i) the Participant is at least fifty-eight (58) years old, (ii) the Participant has at least ten (10) continuous years of service with the Company, (iii) the Participant has given to the Company twelve (12) months’ advance notice of the Participant’s intent to cease providing services to the Company and comply with the Restrictive Covenants, and (iv) such twelve (12) month period has elapsed; provided, that the Participant has not voluntarily stopped providing service to the Company through such twelve (12) month period.

“Restrictive Covenants” shall mean any written post-termination of employment covenants between the Participant and the Company or any of its Affiliates prohibiting or restricting competition, the solicitation of clients or employees or the sharing of confidential information, including any such covenants set forth in a Proprietary Information and Non-Competition Agreement; provided, however; for purposes of this Agreement, the term of such Restrictive Covenants shall (to the extent permitted by law) be deemed to extend to the last vesting date set forth in the Original Vesting Schedule.

(c)Upon a Change in Control, the Committee may determine the treatment of the PSUs in accordance with Section 12.1 of the Plan, provided that if the Committee determines that the performance metric(s) set forth on Appendix A would likely have been achieved below the threshold performance level, then the Committee may determine that the PSU will be canceled in its entirety immediately prior to the Change in Control.

3.Forfeiture.Notwithstanding anything else set forth herein, this grant of PSUs, and any of Participant’s rights and benefits with respect to this Agreement (including all unvested PSUs and vested but unpaid PSUs), shall be immediately forfeited upon the Company’s determination that Participant: (i) has violated any laws, regulations or material Company policies, (ii) breached any written agreement with the Company, including any Restrictive Covenants that may apply to the Participant or (iii) engaged in any other conduct that is detrimental to the business or reputation of the Company.

4.Securities Representations. The grant of the PSUs and any issuance of shares of Common Stock pursuant to this Agreement are being made by the Company in reliance upon the following express representations and warranties of the Participant.

The Participant acknowledges, represents and warrants that:

(a)he or she has been advised that he or she may be an “affiliate” within the meaning of Rule 144 under the Securities Act and in this connection the Company is relying in part on his or her representations set forth in this section;

(b)if he or she is deemed an affiliate within the meaning of Rule 144 of the Securities Act, the Common Stock must be held indefinitely unless an exemption from any applicable resale restrictions is available or the Company files an additional registration statement (or a “re-offer prospectus”) with regard to such Common Stock and the Company is under no obligation to register the Common Stock (or to file a “re-offer prospectus”);

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(c)if he or she is deemed an affiliate within the meaning of Rule 144 of the Securities Act, he or she understands that the exemption from registration under Rule 144 will not be available unless (i) a public trading market then exists for the Common Stock, (ii) adequate information concerning the Company is then available to the public, and (iii) other terms and conditions of Rule 144 or any exemption therefrom are complied with; and that any sale of the Common Stock may be made only in limited amounts in accordance with such terms and conditions.

5.Not an Employment or Service Agreement. Neither the execution of this Agreement nor the grant of PSUs hereunder constitute an agreement by the Company to employ or retain or to continue to employ or retain the Participant during the entire, or any portion of, the term of this Agreement.

6.Miscellaneous.

(a)This Agreement shall inure to the benefit of and be binding upon the parties hereto and their respective heirs, personal legal representatives, successors, trustees, administrators, distributees, devisees and legatees. The Company may assign to, and require, any successor (whether direct or indirect, by purchase, merger, consolidation or otherwise) to all or substantially all of the business and/or assets of the Company or any Affiliate by which the Participant is employed to expressly assume and agree in writing to perform this Agreement. Notwithstanding the foregoing, the Participant may not assign this Agreement.

(b)This award of PSUs shall not affect in any way the right or power of the Board or stockholders of the Company to make or authorize an adjustment, recapitalization or other change in the capital structure or the business of the Company, any merger or consolidation of the Company or subsidiaries, any issue of bonds, debentures, preferred or prior preference stock ahead of or affecting the Common Stock, the dissolution or liquidation of the Company, any sale or transfer of all or part of its assets or business or any other corporate act or proceeding.

(c)The Participant agrees that the award of the PSUs hereunder is special incentive compensation and that it, any dividends paid thereon (even if treated as compensation for tax purposes) will not be taken into account as “salary” or “compensation” or “bonus” in determining the amount of any payment under any pension, retirement or profit-sharing plan of the Company or any life insurance, disability or other benefit plan of the Company.

(d)No modification or waiver of any of the provisions of this Agreement shall be effective unless in writing and signed by the party against whom it is sought to be enforced.

(e)This Agreement may be executed in one or more counterparts, all of which taken together shall constitute one contract.

(f)The failure of any party hereto at any time to require performance by another party of any provision of this Agreement shall not affect the right of such party to require performance of that provision, and any waiver by any party of any breach of any provision of this Agreement shall not be construed as a waiver of any continuing or succeeding breach of such provision, a waiver of the provision itself, or a waiver of any right under this Agreement.

(g)The headings of the sections of this Agreement have been inserted for convenience of reference only and shall in no way restrict or modify any of the terms or provisions hereof.

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(h)All notices, consents, requests, approvals, instructions and other communications provided for herein shall be in writing and validly given or made when delivered, or on the second succeeding business day after being mailed by registered or certified mail, whichever is earlier, to the persons entitled or required to receive the same, at the addresses set forth at the heading of this Agreement or to such other address as either party may designate by like notice. Notices to the Company shall be addressed to the Compensation Committee of the Board with a copy to General Counsel, MarketAxess Holdings Inc., 55 Hudson Yards, 15th Floor, New York, NY 10001.

(i)This Agreement shall be construed, interpreted and governed and the legal relationships of the parties determined in accordance with the internal laws of the State of Delaware without reference to rules relating to conflicts of law.

7.Provisions of Plan and Guidelines Control. This Agreement is subject to all the terms, conditions and provisions of the Plan and the Guidelines, including, without limitation, the amendment provisions thereof, and to such rules, regulations and interpretations relating to the Plan and the Guidelines as may be adopted by the Committee and as may be in effect from time to time. The Plan and the Guidelines are incorporated herein by reference. A copy of the Plan and the Guidelines have been delivered to the Participant. If and to the extent that this Agreement conflicts or is inconsistent with the terms, conditions and provisions of the Plan and the Guidelines, the Plan and the Guidelines shall control, and this Agreement shall be deemed to be modified accordingly. Unless otherwise indicated, any capitalized term used but not defined herein shall have the meaning ascribed to such term in the Plan or the Guidelines. This Agreement contains the entire understanding of the parties with respect to the subject matter hereof (other than any other documents expressly contemplated herein or in the Plan or the Guidelines) and supersedes any prior agreements between the Company and the Participant.

IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be duly executed as of the day and year first above written.

MARKETAXESS HOLDINGS INC.

[Name]

[Title]

PARTICIPANT

[Participant]

4

EX-10.5

Exhibit 10.5

Form of Incentive Stock Option Agreement

for U.S. Based Executive Officers

INCENTIVE STOCK OPTION AGREEMENT

STOCK OPTION AGREEMENT
PURSUANT TO THE
MARKETAXESS HOLDINGS INC.

2020 EQUITY
INCENTIVE PLAN

AGREEMENT (“Agreement”), dated as of [Award Date] by and between MarketAxess Holdings Inc. (the “Company”) and [Participant] (the “Participant”).

Preliminary Statement

The Board of Directors of the Company (the “Board”) or a committee appointed by the Board (the “Committee”) to administer the MarketAxess Holdings Inc. 2020 Equity Incentive Plan (as may be amended and/or restated from time to time) (the “Plan”), has authorized this grant of an incentive stock option (the “Option”) on [Award Date] (the “Grant Date”) to purchase the number of shares of Common Stock set forth below to the Participant, as an Eligible Person of the Company or an Affiliate (collectively, the Company and all Subsidiaries and parents of the Company shall be referred to as the “Employer”). Unless otherwise indicated, any capitalized term used but not defined herein shall have the meaning ascribed to such term in the Plan. A copy of the Plan has been delivered to the Participant. By signing and returning this Agreement, the Participant acknowledges having received and read a copy of the Plan and agrees to comply with it, this Agreement and all applicable laws and regulations.

Accordingly, the parties hereto agree as follows:

1. Tax Matters. The Option granted hereby is intended to qualify as an “incentive stock option” under Section 422 of the Internal Revenue Code of 1986, as amended (the “Code”). Notwithstanding the foregoing, the Option will not qualify as an “incentive stock option,” among other events, (i) if the Participant disposes of the Common Stock acquired pursuant to the Option at any time during the two (2) year period following the date of this Agreement or the one (1) year period following the date on which the Option is exercised; (ii) except in the event of the Participant’s death or disability, as defined in Section 22(e)(3) of the Code, if the Participant is not employed by the Company, any Subsidiary or any parent at all times during the period beginning on the date of this Agreement and ending on the day three (3) months before the date of exercise of the Option; or (iii) to the extent the aggregate fair market value (determined as of the time the Option is granted) of the Common Stock subject to “incentive stock options” which become exercisable for the first time in any calendar year exceeds $100,000. To the extent that the Option does not qualify as an “incentive stock option,” it shall not effect the validity of the Option and shall constitute a separate non-qualified stock option.

2. Grant of Option. Subject in all respects to the Plan and the terms and conditions set forth herein and therein, the Participant is hereby granted an Option to purchase from the Company [Shares Awarded] shares of Common Stock, at a price per share of [Award Price] (the “Exercise Price”).

3. Exercise. Unless otherwise set forth in an agreement between the Participant and the Employer, (a) except as set forth in subsections (b) through (f) below, the Option shall vest and become exercisable as follows, provided that the Participant has not incurred a termination of employment or Service prior to the vesting date:

[X] on [Vest Date 1]

[X] on [Vest Date 2]

[X] on [Vest Date 3]

To the extent that the Option has become vested and exercisable with respect to a number of shares of Common Stock as provided above, the Option may thereafter be exercised by the Participant, in whole or in part, at any time or from time to time and prior to the expiration of the Option as provided herein and in accordance with Section 6.5 of the Plan, including, without limitation, by the filing of any written form of exercise notice as may be required by the Committee and payment in full of the Exercise Price multiplied by the number of shares of Common Stock underlying the portion of the Option exercised and applicable withholding tax and in accordance with Section 6.5(ii)(A)-(D) of the Plan. Upon expiration of the Option, the Option shall be canceled and no longer exercisable.

There shall be no proportionate or partial vesting in the periods prior to each vesting date and all vesting shall occur only on the appropriate vesting date.

(b)The Committee may, in its sole discretion, provide for accelerated vesting of the Option at any time.

(c)If a Participant incurs a termination of employment for any reason except as set forth in subsections (d) through (f), the Option shall be forfeited for no consideration. Notwithstanding anything else set forth herein, this Option grant, and any of Participant’s rights and benefits with respect to this Agreement (including any unvested portion of the Option and the vested but unexercised portion of the Option), shall be immediately forfeited upon the Company’s determination that Participant: (i) has violated any laws, regulations or material Company policies, (ii) breached any written agreement with the Company, including any Restrictive Covenants that may apply to the Participant or (iii) engaged in any other conduct that is detrimental to the business or reputation of the Company.

(d) Upon the death or Disability of the Participant, any unvested portion of the Option at the time of such termination shall become

2

fully vested and exercisable in accordance with Section 5(a) below.

(e) If a Qualified Retirement occurs, any unvested portion of the Option at the time of such termination shall become fully vested on the date such unvested Option would have otherwise vested in accordance with the original vesting schedule, regardless of whether the Participant continues to provide services to the Company; provided that if, prior to the last vesting date set forth in the original vesting schedule, the Participant undertakes any business activity or employment in the financial services or fintech industries without the prior written consent of the Company or breaches any of the terms and conditions of the Restrictive Covenants, any Option which has not yet been settled will be forfeited immediately for no consideration.

A “Qualified Retirement” shall occur upon the first date on which all the following criteria have been satisfied: (i) the Participant is at least fifty-eight (58) years old, (ii) the Participant has at least ten (10) continuous years of service with the Company, (iii) the Participant has given to the Company twelve (12) months’ advance notice of the Participant’s intent to cease providing services to the Company and comply with the Restrictive Covenants, and (iv) such twelve (12) month period has elapsed; provided, that the Participant has not voluntarily stopped providing service to the Company through such twelve (12) month period.

“Restrictive Covenants” shall mean any written post-termination of employment covenants between the Participant and the Company or any of its Affiliates prohibiting or restricting competition, the solicitation of clients or employees or the sharing of confidential information, including any such covenants set forth in a Proprietary Information and Non-Competition Agreement; provided, however; for purposes of this Agreement, the term of such Restrictive Covenants shall (to the extent permitted by law) be deemed to extend to the last vesting date set forth in the original vesting schedule.

(f) In the event of a Change in Control, the Option shall be treated in accordance with Section 11 of the Plan (including without limitation, the vesting provisions set forth in Section 11.3); provided that, immediately prior to the Change in Control, the Committee may determine that the Option will not be continued, assumed or have new rights substituted therefore in accordance with Section 11.1 of the Plan, and immediately prior to the Change in Control, the Option shall become fully vested and exercisable.

4. Option Term. The term of each Option shall be six (6) years after the Grant Date, subject to earlier termination in the event of the Participant’s termination as specified in Section 5 below.

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5. Termination.

Subject to the terms of the Plan and this Agreement, the Option, to the extent vested at the time of the Participant’s termination, shall remain exercisable as follows:

(a)In the event of the Participant's termination by reason of death or Disability, the vested portion of the Option shall remain exercisable until the earlier of (i) one (1) year from the date of such termination or (ii) the expiration of the stated term of the Option pursuant to Section 4 hereof.

(b)In the event of a Qualifying Retirement, the vested portion of the Option shall remain exercisable until the expiration of the stated term of the Option pursuant to Section 4 hereof.

(c) In the event of the Participant's involuntary termination without Cause, the vested portion of the Option shall remain exercisable until the earlier of (i) three (3) months from the date of such termination or (ii) the expiration of the stated term of the Option pursuant to Section 4 hereof.

(d) In the event of the Participant's voluntary termination (other than a voluntary termination described in Section 5(e) below), the vested portion of the Option shall remain exercisable until the earlier of (i) thirty (30) days from the date of such termination or (ii) the expiration of the stated term of the Option pursuant to Section 4 hereof.

(e) In the event of the Participant's termination for Cause or in the event of the Participant's voluntary termination within ninety (90) days after an event that would be grounds for a termination for Cause, the Participant's entire Option (whether or not vested) shall terminate and expire upon such termination.

Unless otherwise set forth in an agreement between the Participant and the Employer, any portion of the Option that is not vested as of the date of the Participant’s termination for any reason shall terminate and expire as of the date of such termination.

6. Restriction on Transfer of Option. No part of the Option shall be transferred other than by will or by the laws of descent and distribution and during the lifetime of the Participant, may be exercised only by the Participant or the Participant’s guardian or legal representative. In addition, the Option shall not be assigned, negotiated, pledged or hypothecated in any way (except as provided by law or herein), and the Option shall not be subject to execution, attachment or similar process. Upon any attempt to Transfer the Option or in the event of any levy upon the Option by reason of any execution, attachment or similar process contrary to the provisions

4

hereof, such transfer shall be void and of no effect and the Company shall have the right to disregard the same on its books and records and to issue “stop transfer” instructions to its transfer agent.

7. Rights as a Stockholder. The Participant shall have no rights as a stockholder with respect to any shares covered by the Option unless and until the Participant has become the holder of record of the shares, and no adjustments shall be made for dividends in cash or other property, distributions or other rights in respect of any such shares, except as otherwise specifically provided for in the Plan.

8. Provisions of Plan Control. This Agreement is subject to all the terms, conditions and provisions of the Plan, including, without limitation, the amendment provisions thereof, and to such rules, regulations and interpretations relating to the Plan as may be adopted by the Committee and as may be in effect from time to time. The Plan is incorporated herein by reference. If and to the extent that this Agreement conflicts or is inconsistent with the terms, conditions and provisions of the Plan, the Plan shall control, and this Agreement shall be deemed to be modified accordingly. This Agreement contains the entire understanding of the parties with respect to the subject matter hereof (other than any exercise notice or other documents expressly contemplated herein or in the Plan) and supersedes any prior agreements between the Company and the Participant with respect to the subject matter hereof.

9. Notices. Any notice or communication given hereunder shall be in writing and shall be deemed to have been duly given: (i) when delivered in person; (ii) two (2) days after being sent by United States mail; or (iii) on the first business day following the date of deposit if delivered by a nationally recognized overnight delivery service, to the appropriate party at the address set forth below (or such other address as the party shall from time to time specify):

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If to the Company, to:

MarketAxess Holdings Inc.

55 Hudson Yards, 15th Floor

New York, NY 10001

Attention: Compensation Committee

If to the Participant, to the address on file with the Company.

10. No Obligation to Continue Employment. This Agreement is not an agreement of employment. This Agreement does not guarantee that the Employer will employ or retain the Participant for any specific time period, nor does it modify in any respect the Employer’s right to terminate or modify the Participant’s employment or compensation.

6

IN WITNESS WHEREOF, the parties have executed this Agreement on the date and year first above written.

MARKETAXESS HOLDINGS INC.

By:

[Name]

[Title]

[Participant]

7

EX-10.6

Exhibit 10.6

Form of 2025 Restricted Stock Unit Agreement

for U.K.-based Executive Officers

RESTRICTED STOCK UNIT AGREEMENT PURSUANT TO APPENDIX 1 OF THE

MARKETAXESS HOLDINGS INC. 2020 EQUITY INCENTIVE PLAN

THIS AGREEMENT, effective as of Award Date, is by and between

MarketAxess Holdings Inc., a Delaware corporation with its principal office at 55 Hudson Yards, 15th Floor, New York, NY 10001 (the “Company”), and [xxx] (the “Participant”).

WHEREAS, the Board of Directors of the Company (the “Board”) adopted, and the stockholders of the Company approved, the MarketAxess Holdings Inc. 2020 Equity Incentive Plan, including Appendix 1 thereto (as may be amended and/or restated from time to time) (the “Plan”), which is administered by a Committee appointed by the Company’s Board of Directors;

WHEREAS, pursuant to Section 3.2 of the Plan, the Committee has adopted guidelines (the “Guidelines”) for the grant of restricted stock units (“RSUs”) under the Plan;

WHEREAS, Appendix 1 of the Plan modifies the Plan in relation to Eligible Persons and Participants who are employed, resident for tax purposes or otherwise subject to tax on employment income in the United Kingdom and references in this Agreement to the Plan shall be deemed to be to the Plan as so modified; and

WHEREAS, the Company, through the Committee, wishes to grant to the Participant RSUs as set forth below.

NOW, THEREFORE, the Company and the Participant agree as follows:

1. Grant of RSUs. Subject to the terms, conditions and restrictions of the Plan and the Guidelines, the Company awards to the Participant [xxx] RSUs. The RSUs hereunder are not Deferrable RSUs and are not eligible for deferral under Section 4 of the Guidelines.

2. Vesting. Unless otherwise set forth in an agreement between the Participant and the Company, the RSUs shall become vested pursuant to the terms of this Agreement and the Plan on the dates set forth below (which constitute the “Original Vesting Schedule”) if the Participant has been continuously providing service to the Company until such date:

[xxx] on Vest Date 1

[xxx] on Vest Date 2

[xxx] on Vest Date 3

There shall be no proportionate or partial vesting in the periods prior to the applicable vesting dates and all vesting shall occur only on the appropriate vesting date.

3. Forfeiture.Notwithstanding anything else set forth herein, this grant of RSUs, and any of Participant’s rights and benefits with respect to this Agreement (including all unvested RSUs and vested but unpaid RSUs), shall be immediately forfeited upon the Company’s determination that Participant: (i) has violated any laws, regulations or material Company policies, (ii) breached any written

agreement with the Company, including any Restrictive Covenants that may apply to the Participant or (iii) engaged in any other conduct that is detrimental to the business or reputation of the Company.

“Restrictive Covenants” shall mean any written post-termination of employment covenants between the Participant and the Company or any of its Affiliates prohibiting or restricting competition, the solicitation of clients or employees or the sharing of confidential information, including any such covenants set forth in a Proprietary Information and Non-Competition Agreement;

4. Taxes.

(a) Tax Liability. The Participant acknowledges, subject to the last sentence of this paragraph, that (i) no later than the date on which any RSU shall have become vested and (in any event) within seven days of any Taxable Event, the Participant shall, to the extent permitted by law and to the extent the same are not otherwise discharged through the operation of PAYE, pay to the Company, or make arrangements satisfactory to the Company regarding payment of, and the Participant hereby indemnifies the Company and its Affiliates against, any Federal, national, state or local taxes, levies, charges and contributions of any kind required by law to be withheld, or for which the Company, its Affiliates or the Participant’s employer are otherwise required to pay or account, with respect to any RSU and/or any related dividend equivalent right payment (including, for the avoidance of doubt, any Tax Liability); (ii) the Company and the Participant’s employer shall, to the extent permitted by law, have the right to deduct from any payment of any kind otherwise due to the Participant any Federal, national, state or local taxes and contributions of any kind required by law to be withheld or accounted for (including, for the avoidance of doubt, any Tax Liability) with respect to any RSU and/or any related shares of Common Stock or dividend equivalent right payment, and the Company may, but shall not be required to, sell a number of shares of Common Stock sufficient to cover any applicable withholding taxes or Tax Liability; and (iii) in the event that the Participant does not satisfy (i) above on a timely basis, and either the withholding taxes or the Tax Liability is not otherwise discharged through the operation of PAYE, the Company or the Participant’s employer may, but shall not be required to, pay such required withholding taxes or Tax Liability and treat such amount as a demand loan to the Participant at the maximum rate permitted by law, with such loan, at the Company’s sole discretion and provided the Company or the Participant’s employer (as the case may be) so notifies the Participant within thirty (30) days of the making of the loan, secured by the relevant Common Stock and any failure by the Participant to pay the loan upon demand shall entitle the Company or the Participant’s employer (as the case may be) to all of the rights at law of a creditor secured by the relevant Common Stock. The Participant’s obligations under this Section 4 shall not be affected by any failure of the Company or the Participant’s employer to deduct the relevant taxes and/or contributions (including, for the avoidance of doubt, any Tax Liability) through the operation of PAYE. The Company may hold as security any certificates representing any relevant Common Stock and, upon demand of the Company, the Participant shall deliver to the Company any certificates in his or her possession representing Common Stock together with a stock power duly endorsed in blank.

(b) UK Tax Elections.By executing this Agreement, the Participant acknowledges and agrees that:

1.the Company or the Participant’s employer (as appropriate) may, to the extent permitted by law, recover from the Participant the whole or any part of any secondary class 1 (employer’s) National Insurance contributions

and/or employer health and social care levy arising from or in connection with the RSU or the relevant shares of Common Stock and may, to the extent permitted by law, require the Participant to elect (using a form approved by HM Revenue & Customs) that the whole or any part of any secondary class 1 (employer’s) National Insurance contributions and/or employer health and social care levy shall be transferred to the Participant; and

2.the Participant further agrees that, if so required by the Company, any of its Affiliates or the Participant’s employer, the Participant will enter into a joint election under section 431(1) of the United Kingdom Income Tax (Earnings and Pensions) Act 2003, in respect of any shares of Common Stock to be issued or transferred in connection with this RSU, within 14 days of the acquisition by the Participant of those shares of Common Stock (or such shorter of longer period as HM Revenue & Customs may direct).

5. Securities Representations. The grant of the RSUs and any issuance of shares of Common Stock pursuant to this Agreement are being made by the Company in reliance upon the following express representations and warranties of the Participant.

The Participant acknowledges, represents and warrants that:

(a)he or she has been advised that he or she may be an “affiliate” within the meaning of Rule 144 under the Securities Act and in this connection the Company is relying in part on his or her representations set forth in this section;

(b)if he or she is deemed an affiliate within the meaning of Rule 144 of the Securities Act, the Common Stock must be held indefinitely unless an exemption from any applicable resale restrictions is available or the Company files an additional registration statement (or a “re-offer prospectus”) with regard to such Common Stock and the Company is under no obligation to register the Common Stock (or to file a “re-offer prospectus”);

(c)if he or she is deemed an affiliate within the meaning of Rule 144 of the Securities Act, he or she understands that the exemption from registration under Rule 144 will not be available unless (i) a public trading market then exists for the Common Stock, (ii) adequate information concerning the Company is then available to the public, and (iii) other terms and conditions of Rule 144 or any exemption therefrom are complied with; and that any sale of the Common Stock may be made only in limited amounts in accordance with such terms and conditions.

6. Not an Employment or Service Agreement. Neither the execution of this Agreement nor the grant of RSUs hereunder constitute an agreement by the Company to employ or retain or to continue to employ or retain the Participant during the entire, or any portion of, the term of this Agreement. Nothing in this Agreement or the Plan interferes in any way with the right of the Company or any Affiliate by which the Participant is employed to terminate the Participant’s Service or other service relationship for any reason or no reason at any time. The rights and obligations of the Participant under the terms of their employment or office with any Affiliate by which the Participant is employed shall not be affected by this Agreement, the RSUs or their participation in the Plan or any right which they may have to participate in it. The Participant waives any and all rights to compensation or damages in consequence of the termination of their employment or office for any reason whatsoever (whether or not such termination is wrongful or unfair and however such termination is caused) insofar

as those rights arise or may arise from the Participant ceasing to have rights under this Agreement or the Plan as a result of such termination.

7. Miscellaneous.

(a) This Agreement shall inure to the benefit of and be binding upon the parties hereto and their respective heirs, personal legal representatives, successors, trustees, administrators, distributees, devisees and legatees. The Company may assign to, and require, any successor (whether direct or indirect, by purchase, merger, consolidation or otherwise) to all or substantially all of the business and/or assets of the Company or any Affiliate by which the Participant is employed to expressly assume and agree in writing to perform this Agreement. Notwithstanding the foregoing, the Participant may not assign this Agreement.

(b) This award of RSUs shall not affect in any way the right or power of the Board or stockholders of the Company to make or authorize an adjustment, recapitalization or other change in the capital structure or the business of the Company, any merger or consolidation of the Company or subsidiaries, any issue of bonds, debentures, preferred or prior preference stock ahead of or affecting the Common Stock, the dissolution or liquidation of the Company, any sale or transfer of all or part of its assets or business or any other corporate act or proceeding.

(c) The Participant agrees that the award of the RSUs hereunder is special incentive compensation and that it, any dividends paid thereon (even if treated as compensation for tax purposes) will not be taken into account as “salary” or “compensation” or “bonus” (or otherwise) in determining the amount of any payment under any pension, retirement or profit-sharing plan of the Company or the Participant’s employer or any life insurance, disability or other benefit plan of the Company or the Participant’s employer.

(d) No modification or waiver of any of the provisions of this Agreement shall be effective unless in writing and signed by the party against whom it is sought to be enforced.

(e) This Agreement may be executed in one or more counterparts, all of which taken together shall constitute one contract.

(f) The failure of any party hereto at any time to require performance by another party of any provision of this Agreement shall not affect the right of such party to require performance of that provision, and any waiver by any party of any breach of any provision of this Agreement shall not be construed as a waiver of any continuing or succeeding breach of such provision, a waiver of the provision itself, or a waiver of any right under this Agreement.

(g) The headings of the sections of this Agreement have been inserted for convenience of reference only and shall in no way restrict or modify any of the terms or provisions hereof.

(h) All notices, consents, requests, approvals, instructions and other communications provided for herein shall be in writing and validly given or made when delivered, or on the second succeeding business day after being mailed by registered or certified mail, whichever is earlier, to the persons entitled or required to receive the same, at the addresses set forth at the heading of this Agreement or to such other address as either party may designate by like notice. Notices to the Company

shall be addressed to the Compensation Committee of the Board with a copy to General Counsel, MarketAxess Holdings Inc., 55 Hudson Yards, 15th Floor, New York, NY 10001.

(i) This Agreement shall be construed, interpreted and governed and the legal relationships of the parties determined in accordance with the internal laws of the State of Delaware without reference to rules relating to conflicts of law.

(j) The Committee may use such currency exchange rate as it may reasonably determine for any purpose in connection with the RSU.

(k) Capitalized terms used but not otherwise defined in this Agreement shall have the meanings given to those terms in the Plan (including, where applicable, Appendix 1 of the Plan).

8. Provisions of Plan Control. This Agreement is subject to all the terms, conditions and provisions of the Plan and the Guidelines, including, without limitation, the amendment provisions thereof, and to such rules, regulations and interpretations relating to the Plan and the Guidelines as may be adopted by the Committee and as may be in effect from time to time. The Plan and the Guidelines are incorporated herein by reference. A copy of the Plan and the Guidelines have been delivered to the Participant. If and to the extent that this Agreement conflicts or is inconsistent with the terms, conditions and provisions of the Plan and the Guidelines, the Plan and the Guidelines shall control, and this Agreement shall be deemed to be modified accordingly. Unless otherwise indicated, any capitalized term used but not defined herein shall have the meaning ascribed to such term in the Plan or the Guidelines. This Agreement contains the entire understanding of the parties with respect to the subject matter hereof (other than any other documents expressly contemplated herein or in the Plan or the Guidelines) and supersedes any prior agreements between the Company and the Participant.

9. Renumeration Policies. Notwithstanding anything herein to the contrary, this Agreement and the any awards granted under this Agreement, are subject to any renumeration, malus and/or clawback policy that is adopted by any affiliate of the Company in accordance with applicable local laws and this Agreement.

IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be duly executed as of the day and year first above written.

MARKETAXESS HOLDINGS INC.

[Name]

[Title]

Participant:

[Name]

6

EX-10.7

Exhibit 10.7

Form of 2025 Performance Stock Unit Agreement

for U.K. Based Executive Officers

PERFORMANCE STOCK UNIT AGREEMENT PURSUANT TO APPENDIX 1 OF THE

MARKETAXESS HOLDINGS INC. 2020 EQUITY INCENTIVE PLAN

THIS AGREEMENT, effective as of Award Date, is by and between

MarketAxess Holdings Inc., a Delaware corporation with its principal office at 55 Hudson Yards, 15th Floor, New York, NY 10001 (the “Company”), and [xxx] (the “Participant”).

WHEREAS, the Board of Directors of the Company (the “Board”) adopted, and the stockholders of the Company approved, the MarketAxess Holdings Inc. 2020 Equity Incentive Plan, including Appendix 1 thereto (as may be amended and/or restated from time to time) (the “Plan”), which is administered by a Committee appointed by the Company’s Board of Directors;

WHEREAS, pursuant to Section 3.2 of the Plan, the Committee has adopted guidelines (the “Guidelines”) for the grant of restricted stock units under the Plan;

WHEREAS, Appendix 1 of the Plan modifies the Plan in relation to Eligible Persons and Participants who are employed, resident for tax purposes or otherwise subject to tax on employment income in the United Kingdom and references in this Agreement to the Plan shall be deemed to be to the Plan as so modified; and

WHEREAS, the Company, through the Committee, wishes to grant to the Participant performance vesting restricted stock units (“PSUs”) that are eligible to vest upon the achievement of the performance metric(s) set forth on Appendix A attached hereto and subject to the Participant’s continuing service with the Company or an Affiliate through the date set forth herein.

NOW, THEREFORE, the Company and the Participant agree as follows:

1. Grant of Performance Stock Units. Subject to the terms, conditions and restrictions of the Plan and the Guidelines, the Company awards to the Participant [xxx] PSUs. The PSUs are not eligible for deferral under Section 4 of the Guidelines.

2. Vesting. (a) Unless otherwise set forth in an agreement between the Participant and the Company, the number of PSUs that vest, if any, shall be determined by the Committee by reference to the level of attainment of the performance metric during the performance period in accordance with Appendix A attached hereto, subject to the Participant continuously providing service to the Company or its Affiliates through February 15, 2028. The Committee shall certify the level of achievement of the performance metric no later than thirty (30) days following the Committee’s receipt of audited financial statements for the last year of the applicable performance period.

Upon a Change in Control, the Committee may determine the treatment of the PSUs in accordance with Section 12.1 of the Plan, provided that if the Committee determines that the performance metric(s) set forth on Appendix A would likely have been achieved below the threshold performance level, then the Committee may determine that the PSU will be canceled in its entirety immediately prior to the Change in Control.

3. Forfeiture.Notwithstanding anything else set forth herein, this grant of PSUs, and any of Participant’s rights and benefits with respect to this Agreement (including all unvested PSUs and vested but unpaid PSUs), shall be immediately forfeited upon the Company’s determination that Participant: (i) has violated any laws, regulations or material Company policies, (ii) breached any written agreement with the Company, including any Restrictive Covenants that may apply to the Participant or (iii) engaged in any other conduct that is detrimental to the business or reputation of the Company.

“Restrictive Covenants” shall mean any written post-termination of employment covenants between the Participant and the Company or any of its Affiliates prohibiting or restricting competition, the solicitation of clients or employees or the sharing of confidential information, including any such covenants set forth in a Proprietary Information and Non-Competition Agreement;

4. Taxes.

(a) Tax Liability. The Participant acknowledges, subject to the last sentence of this paragraph, that (i) no later than the date on which any PSU shall have become vested and (in any event) within seven days of any Taxable Event, the Participant shall, to the extent permitted by law and to the extent the same are not otherwise discharged through the operation of PAYE, pay to the Company, or make arrangements satisfactory to the Company regarding payment of, and the Participant hereby indemnifies the Company and its Affiliates against, any Federal, national, state or local taxes, levies, charges and contributions of any kind required by law to be withheld, or for which the Company, its Affiliates or the Participant’s employer are otherwise required to pay or account, with respect to any PSU and/or any related dividend equivalent right payment (including, for the avoidance of doubt, any Tax Liability); (ii) the Company and the Participant’s employer shall, to the extent permitted by law, have the right to deduct from any payment of any kind otherwise due to the Participant any Federal, national, state or local taxes and contributions of any kind required by law to be withheld or accounted for (including, for the avoidance of doubt, any Tax Liability) with respect to any PSU and/or any related shares of Common Stock or dividend equivalent right payment, and the Company may, but shall not be required to, sell a number of shares of Common Stock sufficient to cover any applicable withholding taxes or Tax Liability; and (iii) in the event that the Participant does not satisfy (i) above on a timely basis, and either the withholding taxes or the Tax Liability is not otherwise discharged through the operation of PAYE, the Company or the Participant’s employer may, but shall not be required to, pay such required withholding taxes or Tax Liability and treat such amount as a demand loan to the Participant at the maximum rate permitted by law, with such loan, at the Company’s sole discretion and provided the Company or the Participant’s employer (as the case may be) so notifies the Participant within thirty (30) days of the making of the loan, secured by the relevant Common Stock and any failure by the Participant to pay the loan upon demand shall entitle the Company or the Participant’s employer (as the case may be) to all of the rights at law of a creditor secured by the relevant Common Stock. The Participant’s obligations under this Section 4 shall not be affected by any failure of the Company or the Participant’s employer to deduct the relevant taxes and/or contributions (including, for the avoidance of doubt, any Tax Liability) through the operation of PAYE. The Company may hold as security any certificates representing any relevant Common Stock and, upon demand of the Company, the Participant shall deliver to the Company any certificates in his or her possession representing Common Stock together with a stock power duly endorsed in blank.

(b) UK Tax Elections.By executing this Agreement, the Participant acknowledges and agrees that:

1.the Company or the Participant’s employer (as appropriate) may, to the extent permitted by law, recover from the Participant the whole or any part of any secondary class 1 (employer’s) National Insurance contributions and/or employer health and social care levy arising from or in connection with the PSU or the relevant shares of Common Stock and may, to the extent permitted by law, require the Participant to elect (using a form approved by HM Revenue & Customs) that the whole or any part of any secondary class 1 (employer’s) National Insurance contributions and/or employer health and social care levy shall be transferred to the Participant; and

2.the Participant further agrees that, if so required by the Company, any of its Affiliates or the Participant’s employer, the Participant will enter into a joint election under section 431(1) of the United Kingdom Income Tax (Earnings and Pensions) Act 2003, in respect of any shares of Common Stock to be issued or transferred in connection with this PSU, within 14 days of the acquisition by the Participant of those shares of Common Stock (or such shorter of longer period as HM Revenue & Customs may direct).

5. Securities Representations. The grant of the PSUs and any issuance of shares of Common Stock pursuant to this Agreement are being made by the Company in reliance upon the following express representations and warranties of the Participant.

The Participant acknowledges, represents and warrants that:

(a)he or she has been advised that he or she may be an “affiliate” within the meaning of Rule 144 under the Securities Act and in this connection the Company is relying in part on his or her representations set forth in this section;

(b)if he or she is deemed an affiliate within the meaning of Rule 144 of the Securities Act, the Common Stock must be held indefinitely unless an exemption from any applicable resale restrictions is available or the Company files an additional registration statement (or a “re-offer prospectus”) with regard to such Common Stock and the Company is under no obligation to register the Common Stock (or to file a “re-offer prospectus”);

(c)if he or she is deemed an affiliate within the meaning of Rule 144 of the Securities Act, he or she understands that the exemption from registration under Rule 144 will not be available unless (i) a public trading market then exists for the Common Stock, (ii) adequate information concerning the Company is then available to the public, and (iii) other terms and conditions of Rule 144 or any exemption therefrom are complied with; and that any sale of the Common Stock may be made only in limited amounts in accordance with such terms and conditions.

6. Not an Employment or Service Agreement. Neither the execution of this Agreement nor the grant of PSUs hereunder constitute an agreement by the Company to employ or retain or to continue to employ or retain the Participant during the entire, or any portion of, the term

of this Agreement. Nothing in this Agreement or the Plan interferes in any way with the right of the Company or any Affiliate by which the Participant is employed to terminate the Participant’s Service or other service relationship for any reason or no reason at any time. The rights and obligations of the Participant under the terms of their employment or office with any Affiliate by which the Participant is employed shall not be affected by this Agreement, the PSUs or their participation in the Plan or any right which they may have to participate in it. The Participant waives any and all rights to compensation or damages in consequence of the termination of their employment or office for any reason whatsoever (whether or not such termination is wrongful or unfair and however such termination is caused) insofar as those rights arise or may arise from the Participant ceasing to have rights under this Agreement or the Plan as a result of such termination

7. Miscellaneous.

(a) This Agreement shall inure to the benefit of and be binding upon the parties hereto and their respective heirs, personal legal representatives, successors, trustees, administrators, distributees, devisees and legatees. The Company may assign to, and require, any successor (whether direct or indirect, by purchase, merger, consolidation or otherwise) to all or substantially all of the business and/or assets of the Company or any Affiliate by which the Participant is employed to expressly assume and agree in writing to perform this Agreement. Notwithstanding the foregoing, the Participant may not assign this Agreement.

(b) This award of PSUs shall not affect in any way the right or power of the Board or stockholders of the Company to make or authorize an adjustment, recapitalization or other change in the capital structure or the business of the Company, any merger or consolidation of the Company or subsidiaries, any issue of bonds, debentures, preferred or prior preference stock ahead of or affecting the Common Stock, the dissolution or liquidation of the Company, any sale or transfer of all or part of its assets or business or any other corporate act or proceeding.

(c) The Participant agrees that the award of the PSUs hereunder is special incentive compensation and that it, any dividends paid thereon (even if treated as compensation for tax purposes) will not be taken into account as “salary” or “compensation” or “bonus” (or otherwise) in determining the amount of any payment under any pension, retirement or profit-sharing plan of the Company or the Participant’s employer or any life insurance, disability or other benefit plan of the Company or the Participant’s employer.

(d) No modification or waiver of any of the provisions of this Agreement shall be effective unless in writing and signed by the party against whom it is sought to be enforced.

(e) This Agreement may be executed in one or more counterparts, all of which taken together shall constitute one contract.

(f) The failure of any party hereto at any time to require performance by another party of any provision of this Agreement shall not affect the right of such party to require performance of that provision, and any waiver by any party of any breach of any provision of this Agreement shall not be construed as a waiver of any continuing or succeeding breach of such provision, a waiver of the provision itself, or a waiver of any right under this Agreement.

(g) The headings of the sections of this Agreement have been inserted for convenience of reference only and shall in no way restrict or modify any of the terms or provisions hereof.

(h) All notices, consents, requests, approvals, instructions and other communications provided for herein shall be in writing and validly given or made when delivered, or on the second succeeding business day after being mailed by registered or certified mail, whichever is earlier, to the persons entitled or required to receive the same, at the addresses set forth at the heading of this Agreement or to such other address as either party may designate by like notice. Notices to the Company shall be addressed to the Compensation Committee of the Board with a copy to General Counsel, MarketAxess Holdings Inc., 55 Hudson Yards, 15th Floor, New York, NY 10001.

(i) This Agreement shall be construed, interpreted and governed and the legal relationships of the parties determined in accordance with the internal laws of the State of Delaware without reference to rules relating to conflicts of law.

(j) The Committee may use such currency exchange rate as it may reasonably determine for any purpose in connection with the PSU.

(k) Capitalized terms used but not otherwise defined in this Agreement shall have the meanings given to those terms in the Plan (including, where applicable, Appendix 1 of the Plan).

8. Provisions of Plan Control. This Agreement is subject to all the terms, conditions and provisions of the Plan and the Guidelines, including, without limitation, the amendment provisions thereof, and to such rules, regulations and interpretations relating to the Plan and the Guidelines as may be adopted by the Committee and as may be in effect from time to time. The Plan and the Guidelines are incorporated herein by reference. A copy of the Plan and the Guidelines have been delivered to the Participant. If and to the extent that this Agreement conflicts or is inconsistent with the terms, conditions and provisions of the Plan and the Guidelines, the Plan and the Guidelines shall control, and this Agreement shall be deemed to be modified accordingly. Unless otherwise indicated, any capitalized term used but not defined herein shall have the meaning ascribed to such term in the Plan or the Guidelines. This Agreement contains the entire understanding of the parties with respect to the subject matter hereof (other than any other documents expressly contemplated herein or in the Plan or the Guidelines) and supersedes any prior agreements between the Company and the Participant.

9. Renumeration Policies. Notwithstanding anything herein to the contrary, this Agreement and the any awards granted under this Agreement, are subject to any renumeration, malus and/or clawback policy that is adopted by any affiliate of the Company in accordance with applicable local laws and this Agreement.

IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be duly executed as of the day and year first above written.

MARKETAXESS HOLDINGS INC.

[Name]

[Title]

Participant:

[Name]

6

EX-31.1

Exhibit 31.1

CERTIFICATIONS

I, Christopher R. Concannon, certify that:

1. I have reviewed this quarterly report on Form 10-Q of MarketAxess Holdings Inc.;

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)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer 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.

/s/ CHRISTOPHER R. CONCANNON

Christopher R. Concannon

Chief Executive Officer

(principal executive officer)

Dated: May 7, 2025

EX-31.2

Exhibit 31.2

CERTIFICATIONS

I, Ilene Fiszel Bieler, certify that:

1. I have reviewed this quarterly report on Form 10-Q of MarketAxess Holdings Inc.;

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)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer 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.

/s/ ILENE FISZEL BIELER

Ilene Fiszel Bieler

Chief Financial Officer

(principal financial officer)

Dated: May 7, 2025

EX-32.1

Exhibit 32.1

Certification Under Section 906 of the Sarbanes-Oxley Act of 2002

(United States Code, Title 18, Chapter 63, Section 1350)

Accompanying Quarterly Report on Form 10-Q of

MarketAxess Holdings Inc. for the Quarter Ended March 31, 2025

In connection with the Quarterly Report on Form 10-Q of MarketAxess Holdings Inc. (the “Company”) for the quarter ended March 31, 2025, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Christopher R. Concannon, Chief Executive Officer of the Company, hereby certify, pursuant to 18 U.S.C. Section 1350, that:

(1) The Report fully complies with the requirements of Section 13(a) or 15(d), as applicable, 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.

/s/ CHRISTOPHER R. CONCANNON

Christopher R. Concannon

Chief Executive Officer

May 7, 2025

This certification shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, or otherwise subject to the liability of that section, nor shall it be deemed to be incorporated by reference into any filing under the Securities Act of 1933 or the Securities Exchange Act of 1934, except to the extent the Company specifically incorporates it by reference.

EX-32.2

Exhibit 32.2

Certification Under Section 906 of the Sarbanes-Oxley Act of 2002

(United States Code, Title 18, Chapter 63, Section 1350)

Accompanying Quarterly Report on Form 10-Q of

MarketAxess Holdings Inc. for the Quarter Ended March 31, 2025

In connection with the Quarterly Report on Form 10-Q of MarketAxess Holdings Inc. (the “Company”) for the quarter ended March 31, 2025, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Ilene Fiszel Bieler, Chief Financial Officer of the Company, hereby certify, pursuant to 18 U.S.C. Section 1350, that:

(1) The Report fully complies with the requirements of Section 13(a) or 15(d), as applicable, 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.

/s/ ILENE FISZEL BIELER

Ilene Fiszel Bieler

Chief Financial Officer

May 7, 2025

This certification shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, or otherwise subject to the liability of that section, nor shall it be deemed to be incorporated by reference into any filing under the Securities Act of 1933 or the Securities Exchange Act of 1934, except to the extent the Company specifically incorporates it by reference.

XML

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2025	May 05, 2025
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2025
Document Fiscal Year Focus	2025
Document Fiscal Period Focus	Q1
Trading Symbol	MKTX
Entity Registrant Name	MARKETAXESS HOLDINGS INC.
Entity Central Index Key	0001278021
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Shell Company	false
Title of 12(b) Security	Common Stock, $0.003 par value
Security Exchange Name	NASDAQ
Entity File Number	001-34091
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	52-2230784
Entity Address, Address Line One	55 Hudson Yards
Entity Address, Address Line Two	15th Floor
Entity Address, City or Town	New York
Entity Address, State or Province	NY
Entity Address, Postal Zip Code	10001
Document Quarterly Report	true
Document Transition Report	false
City Area Code	212
Local Phone Number	813-6000
Entity Common Stock, Shares Outstanding		37,501,661

XML

Consolidated Statements of Financial Condition (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
ASSETS
Cash and cash equivalents	$ 486,224	$ 544,478
Cash segregated under federal regulations	47,514	47,107
Investments, at fair value	166,113	165,260
Accounts receivable, net of allowance of $658 and $982 as of March 31, 2025 and December 31, 2024, respectively	109,171	91,845
Receivables from broker-dealers, clearing organizations and customers	493,613	357,728
Goodwill	236,706	236,706
Intangible assets, net of accumulated amortization	94,430	98,078
Furniture, equipment, leasehold improvements and capitalized software, net of accumulated depreciation and amortization	107,858	107,298
Operating lease right-of-use assets	56,624	58,132
Prepaid expenses and other assets	79,843	82,584
Total assets	1,878,096	1,789,216
Liabilities
Accrued employee compensation	30,912	68,054
Payables to broker-dealers, clearing organizations and customers	318,866	218,845
Income and other tax liabilities	80,987	3,683
Accounts payable, accrued expenses and other liabilities	29,215	37,320
Operating lease liabilities	70,803	72,654
Total liabilities	530,783	400,556
Commitments and Contingencies (Note 13)
Stockholders' equity
Preferred stock	0	0
Common stock	123	123
Additional paid-in capital	348,708	350,701
Treasury stock - Common stock voting, at cost, 3,556,254 shares and 3,374,047 shares as of March 31, 2025 and December 31, 2024, respectively	(370,342)	(333,369)
Retained earnings	1,392,279	1,405,904
Accumulated other comprehensive loss	(23,455)	(34,699)
Total stockholders' equity	1,347,313	1,388,660
Total liabilities and stockholders' equity	1,878,096	1,789,216
Series A Preferred Stock [Member]
Stockholders' equity
Preferred stock	$ 0	$ 0

XML

Consolidated Statements of Financial Condition (Parenthetical) (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Allowance for accounts receivable	$ 658	$ 982
Preferred stock, par value	$ 0.001	$ 0.001
Preferred stock, shares authorized	4,855,000	4,855,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.003	$ 0.003
Common stock, shares authorized	110,000,000	110,000,000
Common stock, shares issued	41,127,475	41,020,421
Common stock, shares outstanding	37,571,221	37,646,374
Treasury Stock, Common, Shares	3,556,254	3,374,047
Series A Preferred Stock [Member]
Preferred stock, par value	$ 0.001	$ 0.001
Preferred stock, shares authorized	110,000	110,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common Stock Non-Voting [Member]
Common stock, par value	$ 0.003	$ 0.003
Common stock, shares authorized	10,000,000	10,000,000
Common stock, shares issued	0	0
Common stock, shares outstanding	0	0

XML

Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Revenues
Revenues	$ 208,576	$ 210,318
Expenses
Employee compensation and benefits	61,916	61,264
Depreciation and amortization	18,236	18,200
Technology and communications	18,048	17,051
Professional and consulting fees	6,410	6,395
Occupancy	3,622	3,425
Marketing and advertising	2,061	1,833
Clearing costs	4,185	4,911
General and administrative	5,716	4,739
Total expenses	120,194	117,818
Operating income	88,382	92,500
Other income (expense)
Interest income	7,169	5,973
Interest expense	(213)	(316)
Equity in earnings of unconsolidated affiliate	289	370
Other, net	527	(1,810)
Total other income (expense)	7,772	4,217
Income before income taxes	96,154	96,717
Provision for income taxes	81,089	24,102
Net income	$ 15,065	$ 72,615
Net income per common share
Basic	$ 0.4	$ 1.92
Diluted	0.4	1.92
Cash dividends declared per common share	$ 0.76	$ 0.74
Weighted average shares outstanding
Basic	37,388	37,740
Diluted	37,456	37,790
Commissions [Member]
Revenues
Revenues	$ 181,343	$ 184,873
Information Services [Member]
Revenues
Revenues	12,904	11,881
Post-trade Services [Member]
Revenues
Revenues	11,088	10,730
Technology Services [Member]
Revenues
Revenues	$ 3,241	$ 2,834

XML

Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Statement of Comprehensive Income [Abstract]
Net Income (Loss)	$ 15,065	$ 72,615
Cumulative translation adjustment	11,010	(4,241)
Net unrealized gain/(loss) on securities available-for- sale, net of tax of $(73) and 33, respectively	234	(40)
Comprehensive income	$ 26,309	$ 68,334

XML

Consolidated Statements of Comprehensive Income (Parenthetical) (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Statement of Comprehensive Income [Abstract]
Securities available-for-sale, tax expense (benefit)	$ (73)	$ 33

XML

Consolidated Statements of Changes in Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock Voting [Member]	Additional Paid-In Capital [Member]	Treasury Stock - Common Stock Voting [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Loss [Member]
Beginning Balance at Dec. 31, 2023	$ 1,292,963	$ 123	$ 333,292	$ (260,298)	$ 1,244,216	$ (24,370)
Net Income (Loss)	72,615				72,615
Cumulative translation adjustment	(4,241)					(4,241)
Unrealized net gain (loss) on securities available-for-sale, net of tax	(40)					(40)
Stock-based compensation	7,298		7,298
Exercise of stock options	1,977		1,977
Withholding tax payments on Full Value Awards vesting and stock option exercises	(14,893)		(14,893)
Reissuance of treasury stock	704		(155)	1,440	(581)
Repurchases of common stock	(10,147)			(10,147)
Cash dividend on common stock	(28,003)				(28,003)
Ending Balance at Mar. 31, 2024	1,318,233	123	327,519	(269,005)	1,288,247	(28,651)
Beginning Balance at Dec. 31, 2024	1,388,660	123	350,701	(333,369)	1,405,904	(34,699)
Net Income (Loss)	15,065				15,065
Cumulative translation adjustment	11,010					11,010
Unrealized net gain (loss) on securities available-for-sale, net of tax	234					234
Stock-based compensation	7,696		7,696
Withholding tax payments on Full Value Awards vesting and stock option exercises	(9,525)		(9,525)
Reissuance of treasury stock	940		(164)	1,104
Repurchases of common stock	(38,077)			(38,077)
Cash dividend on common stock	(28,690)				(28,690)
Ending Balance at Mar. 31, 2025	$ 1,347,313	$ 123	$ 348,708	$ (370,342)	$ 1,392,279	$ (23,455)

XML

Consolidated Statements of Changes in Stockholders' Equity (Parenthetical) (Unaudited) - $ / shares	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Statement of Stockholders' Equity [Abstract]
Cash dividends declared per common share	$ 0.76	$ 0.74

XML

Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Cash flows from operating activities
Net Income (Loss)	$ 15,065	$ 72,615
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	18,236	18,200
Amortization of operating lease right-of-use assets	1,763	1,599
Stock-based compensation expense	7,333	7,103
Deferred taxes	(124)	(1,338)
Foreign currency transaction losses	1,691	187
Other	(4,809)	1,730
Changes in operating assets and liabilities:
(Increase) in accounts receivable	(16,414)	(10,491)
(Increase)/decrease in receivables from broker-dealers, clearing organizations and customers	(129,508)	21,735
Decrease/(increase) in prepaid expenses and other assets	5,570	(1,323)
(Decrease) in accrued employee compensation	(34,310)	(29,017)
Increase/(decrease) in payables to broker-dealers, clearing organizations and customers	96,275	(71,135)
Increase/(decrease) in income and other tax liabilities	77,295	(4,001)
(Decrease) in accounts payable, accrued expenses and other liabilities	(7,146)	(8,385)
(Decrease) in operating lease liabilities	(2,125)	(2,154)
Net cash provided by/(used in) operating activities	29,629	(4,949)
Cash flows from investing activities
Proceeds from maturities and sales	5,271	4,302
Purchases	(5,458)	(4,972)
Purchases of furniture, equipment and leasehold improvements	(1,930)	(1,197)
Capitalization of software development costs	(15,031)	(13,963)
Net cash (used in) investing activities	(17,148)	(15,830)
Cash flows from financing activities
Cash dividends on common stock	(29,464)	(29,480)
Exercise of stock options	0	1,977
Withholding tax payments on Full Value Awards vesting and stock option exercises	(9,525)	(14,893)
Repurchases of common stock	(38,077)	(10,147)
Net cash (used in) financing activities	(77,066)	(52,543)
Effect of exchange rate changes on cash and cash equivalents	8,580	(3,186)
Cash and cash equivalents including restricted cash
Net decrease for the period	(56,005)	(76,508)
Beginning of period	700,459	611,672
End of period	644,454	535,164
Supplemental cash flow information
Cash paid/(refunded) for income taxes	(1,874)	37,187
Cash paid for interest	198	431
Non-cash investing and financing activity
Operating lease right-of-use assets obtained in exchange for operating lease liabilities	92	630
Furniture, equipment, software and leasehold improvement additions included in accounts payable	501	4,825
Stock-based and accrued incentive compensation relating to capitalized software development costs	1,754	921
Exercise of stock options - cashless	0	1,735
Trading Investments [Member]
Changes in operating assets and liabilities:
Decrease/(increase) in trading investments	0	255
Mutual Funds Held In Rabbi Trust [Member]
Changes in operating assets and liabilities:
Decrease/(increase) in trading investments	$ 837	$ (529)

XML

Pay vs Performance Disclosure - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Pay vs Performance Disclosure
Net Income (Loss)	$ 15,065	$ 72,615

XML

Insider Trading Arrangements	3 Months Ended
	Mar. 31, 2025
Trading Arrangements, by Individual
Rule 10b5-1 Arrangement Adopted	false
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false

XML

Organization and Principal Business Activity

3 Months Ended

Mar. 31, 2025

Accounting Policies [Abstract]

Organization and Principal Business Activity

1. Organization and Principal Business Activity

MarketAxess Holdings Inc. (the “Company” or “MarketAxess”) was incorporated in the State of Delaware on April 11, 2000. Through its subsidiaries, MarketAxess operates leading electronic trading platforms delivering expanded liquidity opportunities, improved execution quality and significant cost savings across global fixed-income markets. Approximately 2,100 institutional investor and broker-dealer firms use MarketAxess’ patented trading technology to access global liquidity on its platforms in U.S. high-grade bonds, U.S. high-yield bonds, emerging market debt, eurobonds, municipal bonds, U.S. government bonds and other fixed-income securities. MarketAxess offers a diverse set of trading protocols, automated and algorithmic trading solutions, intelligent data products and a range of post-trade and technology services to provide an end-to-end trading solution to its network of platform participants. Through its Open Trading® protocols, MarketAxess executes bond trades between and among institutional investor and broker-dealer clients in the leading all-to-all anonymous trading environment for corporate bonds.

XML

Significant Accounting Policies

3 Months Ended

Mar. 31, 2025

Accounting Policies [Abstract]

Significant Accounting Policies

2. Significant Accounting Policies

Basis of Presentation

The consolidated financial statements include the accounts of the Company and its subsidiaries. All intercompany transactions and balances have been eliminated. These consolidated financial statements are unaudited and should be read in conjunction with the audited consolidated financial statements included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2024. The consolidated financial information as of December 31, 2024 has been derived from audited financial statements not included herein. These unaudited consolidated financial statements are prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) and the rules and regulations of the U.S. Securities and Exchange Commission (“SEC”) with respect to Form 10-Q and reflect all adjustments that, in the opinion of management, are normal and recurring, and that are necessary for a fair statement of the results for the interim periods presented. In accordance with such rules and regulations, certain disclosures that are normally included in annual financial statements have been omitted. Interim period operating results may not be indicative of the operating results for a full year.

Cash and Cash Equivalents

The Company defines cash equivalents as short-term interest-bearing investments with maturities at the time of purchase of three months or less.

Investments

The Company determines the appropriate classification of securities at the time of purchase which are recorded in the Consolidated Statements of Financial Condition on the trade date. Securities are classified as available-for-sale or trading. Available-for-sale investments are carried at fair value with unrealized gains or losses reported in accumulated other comprehensive loss in the Consolidated Statements of Financial Condition and realized gains or losses reported in other, net in the Consolidated Statements of Operations. Trading investments include U.S. Treasuries and are carried at fair value, with realized and unrealized gains or losses included in other, net in the Consolidated Statements of Operations.

The Company assesses whether an impairment loss on its available-for-sale debt securities has occurred due to declines in fair value or other market conditions. When the amortized cost basis of an available-for-sale debt security exceeds its fair value, the security is deemed to be impaired. The portion of an impairment related to credit losses is determined by comparing the present value of cash flows expected to be collected from the security with the amortized cost basis of the security and is recorded as a charge in the Consolidated Statements of Operations. The remainder of an impairment is recognized in accumulated other comprehensive loss if the Company does not intend to sell the security and it is more likely than not that the Company will not be required to sell the security prior to recovery.

Fair Value Financial Instruments

Fair value is defined as “the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date.” A three-tiered hierarchy for determining fair value has been established that prioritizes inputs to valuation techniques used in fair value calculations. The three levels of inputs are defined as Level 1 (unadjusted quoted prices for identical assets or liabilities in active markets), Level 2 (inputs that are observable in the marketplace other than those inputs classified in Level 1) and Level 3 (inputs that are unobservable in the marketplace). The Company’s financial assets and liabilities measured at fair value on a recurring basis consist of its money market funds, trading securities, available-for-sale securities and foreign currency forward contracts. All other financial instruments are short-term in nature and the carrying amounts reported on the Consolidated Statements of Financial Condition approximate fair value.

Receivables from and Payables to Broker-dealers, Clearing Organizations and Customers

Receivables from broker-dealers, clearing organizations and customers include amounts receivable for securities not delivered by the Company to the purchaser by the settlement date (“securities failed-to-deliver”) and cash deposits held at clearing organizations and clearing brokers to facilitate the settlement and clearance of matched principal transactions. Payables to broker-dealers, clearing organizations and customers include amounts payable for securities not received by the Company from a seller by the settlement date (“securities failed-to-receive”). Securities failed-to-deliver and securities failed-to-receive for transactions executed on a matched principal basis where the Company serves as a counterparty to both the buyer and the seller are recorded on a settlement date basis. The Company presents its securities failed-to-deliver and securities failed-to-receive balances on a net-by-counterparty basis within receivables from and payables to broker-dealers, clearing organizations and customers. The difference between the Company’s trade-date receivables and payables for unsettled matched principal transactions reflects commissions earned and is recorded within accounts receivable, net on a trade date basis.

Allowance for Credit Losses

All accounts receivable have contractual maturities of less than one year and are derived from trading-related fees and commissions and revenues from products and services. The Company continually monitors collections and payments from its customers and maintains an allowance for doubtful accounts. The allowance for credit losses is based on the estimated expected credit losses in accounts receivable, as determined from a review of aging schedules, past due balances, historical collection experience and other specific collection issues that have been identified. Account balances are grouped for evaluation based on various risk characteristics, including billing type, legal entity, and geographic region. Additions to the allowance for credit losses are charged to bad debt expense, which is included in general and administrative expense in the Company’s Consolidated Statements of Operations. Balances that are determined to be uncollectable are written off against the allowance for credit losses.

The allowance for credit losses was $0.7 million and $1.0 million as of March 31, 2025 and December 31, 2024, respectively. The provision for bad debts was $0.2 million and $0.1 million for the three months ended March 31, 2025 and 2024, respectively. Write-offs and other charges against the allowance for credit losses were $0.3 million for the three months ended March 31, 2025 and immaterial for the three months ended March 31, 2024.

Depreciation and Amortization

Fixed assets are carried at cost less accumulated depreciation. The Company uses the straight-line method of depreciation over three to seven years. The Company amortizes leasehold improvements on a straight-line basis over the lesser of the life of the improvement or the remaining term of the lease.

Software Development Costs

The Company capitalizes certain costs associated with the development of internal use software, including, among other items, employee compensation and related benefits and third-party consulting costs at the point at which the conceptual formulation, design and testing of possible software project alternatives have been completed. Once the product is ready for its intended use, such costs are amortized on a straight-line basis over three to five years. The Company reviews the amounts capitalized for impairment whenever events or changes in circumstances indicate that the carrying amounts of the assets may not be recoverable.

Foreign Currency Translation and Forward Contracts

Assets and liabilities denominated in foreign currencies are translated using exchange rates at the end of the period; revenues and expenses are translated at average monthly rates. Gains and losses on foreign currency translation are a component of accumulated other comprehensive loss in the Consolidated Statements of Financial Condition. Transaction gains and losses are recorded in other, net in the Consolidated Statements of Operations.

The Company enters into foreign currency forward contracts to economically hedge its foreign currency transaction gains and losses. Realized and unrealized gains and losses on these forward contracts are included in other, net in the Consolidated Statements of Operations. The Company records the fair value of the forward contract asset in prepaid expenses and other assets or the fair value of the forward contract liability in accounts payable, accrued expenses and other liabilities in the Consolidated Statements of Financial Condition.

Revenue Recognition

The Company’s classification of revenues in the Consolidated Statements of Operations represents revenues from contracts with customers disaggregated by type of revenue. The Company has four revenue streams as described below.

Commission Revenue – The Company charges its broker-dealer clients variable transaction fees for trades executed on its platforms and, under certain plans, distribution fees or monthly minimum fees to use the platforms for a particular product area. Variable transaction fees are recognized on a trade date basis, are generally calculated as a percentage of the notional dollar volume of bonds traded on the platforms and vary based on the type, size, yield and maturity of the bond traded, as well as individual client incentives. Bonds that are more actively traded or that have shorter maturities generally generate lower commissions, while bonds that are less actively traded or that have longer maturities generally command higher commissions. Under the Company’s disclosed trading transaction fee plans, variable transaction fees, distribution fees and unused monthly fee commitments are invoiced and recorded on a monthly basis.

For Open Trading trades that the Company executes between and among institutional investor and broker-dealer clients on a matched principal basis by serving as counterparty to both the buyer and the seller, the Company earns its commission through the difference in price between the two trades. The commission is collected upon settlement of the trade, which typically occurs within one to two trading days after the trade date. For the majority of the Company’s U.S. Treasury matched principal trades, commissions are invoiced and recorded on a monthly basis.

Following its acquisition of Pragma LLC and Pragma Financial Systems LLC (collectively, “Pragma”) in the fourth quarter of 2023, the Company also earns other commissions on equities and foreign exchange products for algorithmic trading services. These fees incorporate variable transaction fees, which are calculated as a percentage of the notional dollar volume traded and are billed on a monthly basis.

The following table presents commission revenue by fee type:

	Three Months Ended March 31,
	2025		2024
	(In thousands)
Commission revenue by fee type
Variable transaction fees
Disclosed trading	$	95,455	$	94,778
Open Trading – matched principal trading		43,052		48,180
U.S. government bonds - matched principal trading		4,529		3,712
Other		4,955		4,849
Total variable transaction fees		147,991		151,519
Distribution fees and unused minimum fees		33,352		33,354
Total commissions	$	181,343	$	184,873

Information services – Information services includes data licensed to the Company’s broker-dealer clients, institutional investor clients and data-only subscribers; professional and consulting services; technology software licenses; and maintenance and support services. The nature and timing of each performance obligation may vary as these contracts are either subscription-based services transferred over time, and may be net of volume-based discounts, or one-time services that are transferred at a point in time. Revenues for services transferred over time are recognized ratably over the contract period as the Company’s performance obligation is met, whereas revenues for services transferred at a point in time are recognized in the period the services are provided. Customers are generally billed monthly, quarterly, or annually; revenues billed in advance are deferred and recognized ratably over the contract period. The following table presents information services revenue by timing of recognition:

	Three Months Ended March 31,
	2025		2024
	(In thousands)
Information services revenue by timing    of recognition
Services transferred over time	$	12,699	$	11,874
Services transferred at a point in time		205		7
Total information services revenues	$	12,904	$	11,881

Post-trade services – Post-trade services revenue is generated from regulatory transaction reporting, trade publication and post-trade matching services. Customers are generally billed monthly in arrears, and revenue is recognized in the period transactions are processed. Revenues billed in advance are deferred and recognized ratably over the contract period. The Company also generates one-time implementation fees for onboarding clients, which are invoiced and recognized in the period the implementation is completed. The following table presents post-trade services revenue by timing of recognition:

	Three Months Ended March 31,
	2025		2024
	(In thousands)
Post-trade services revenue by timing    of recognition
Services transferred over time	$	11,049	$	10,540
Services transferred at a point in time		39		190
Total post-trade services revenues	$	11,088	$	10,730

Technology services – Technology services revenue primarily includes technology services revenue generated by Pragma and revenue from telecommunications line charges to broker-dealer clients. Customers may be billed monthly or quarterly in arrears or in advance, and revenue is recognized in the period transactions are processed. Revenues billed in advance are deferred and recognized ratably over the contract period.

The following table presents technology services revenue by timing of recognition:

	Three Months Ended March 31,
	2025		2024
	(In thousands)
Technology services revenue by timing    of recognition
Services transferred over time	$	3,062	$	2,830
Services transferred at a point in time		179		4
Total technology services revenues	$	3,241	$	2,834

Contract liabilities consist of deferred revenues that the Company records when cash payments are received or due in advance of services to be performed. Deferred revenues are included in accounts payable, accrued expenses and other liabilities on the Consolidated Statements of Financial Condition. The revenue recognized from contract liabilities and the remaining balance is shown below:

	December 31, 2024			Payments received in advance of services to be performed		Revenue recognized for services performed during the period			Foreign Currency Translation		March 31, 2025
		(In thousands)
Information services	$		3,302	$	3,043	$	(3,713	)	$	—	$	2,632
Post-trade services			1,286		6,877		(6,251	)		39		1,951
Technology services			415		1,933		(1,980	)		—		368
Total deferred revenue	$		5,003	$	11,853	$	(11,944	)	$	39	$	4,951

The majority of the Company’s information services and post-trade services contracts are short-term in nature with durations of one year or less. For contracts with original durations extending beyond one year, the aggregate amount of the transaction price allocated to remaining performance obligations was $46.0 million as of March 31, 2025. The Company expects to recognize revenue associated with the remaining performance obligations over the next 43 months.

Stock-Based Compensation

The Company measures and recognizes compensation expense for all share-based payment awards based on their estimated fair values measured as of the grant date. These costs are recognized as an expense in the Consolidated Statements of Operations over the requisite service period, which is typically the vesting period, with an offsetting increase to additional paid-in capital. Forfeitures are recognized as they occur.

Income Taxes

Income taxes are accounted for using the asset and liability method. Deferred income taxes reflect the net tax effects of temporary differences between the financial reporting and tax bases of assets and liabilities and are measured using the enacted tax rates and laws that will be in effect when such differences are expected to reverse. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date. A valuation allowance is recognized against deferred tax assets if it is more likely than not that such assets will not be realized in future years. Tax benefits for uncertain tax positions are recognized when it is more likely than not that the positions will be sustained upon examination based on their technical merits. The Company recognizes interest and penalties related to unrecognized tax benefits in the provision for income taxes in the Consolidated Statements of Operations. All tax effects related to share-based payments are recorded in the provision for income taxes in the periods during which the awards are exercised or vest.

Business Combinations, Goodwill and Intangible Assets

Business combinations are accounted for under the purchase method of accounting. The total cost of an acquisition is allocated to the underlying net assets based on their respective estimated fair values. The excess of the purchase price over the estimated fair values of the net assets acquired is recorded as goodwill. Determining the fair value of certain assets acquired and liabilities assumed requires judgment and often involves the use of significant estimates and assumptions, including assumptions with respect to future cash flows, discount rates, revenue growth rates, customer attrition rates, royalty rates, obsolescence and asset lives. Intangible assets are valued using various methodologies, including the relief-from-royalty method and multi-period excess earnings method.

The Company operates as a single reporting unit. Following an acquisition, goodwill no longer retains its identification with a particular acquisition, but instead becomes identifiable with the entire reporting unit. As a result, all of the fair value of the Company is available to support the value of goodwill. An impairment review of goodwill is performed on an annual basis, at year-end, or more frequently if circumstances change. Intangible assets with definite lives, including purchased technologies, customer relationships and other intangible assets, are amortized over their estimated useful lives which range from one to 15 years using either a straight-line or accelerated amortization method based on the pattern of economic benefit the Company expects to realize from such assets. Intangible assets are assessed for impairment when events or circumstances indicate the existence of a possible impairment.

Equity Investments and Consolidation

The Company evaluates equity investments for potential consolidation under the voting-interest or variable-interest models. The Company consolidates investees over which the Company determines it has control under the voting interest model, generally greater than 50% ownership, or for which the Company is the primary beneficiary under the variable-interest model. The Company uses the equity method of accounting when it exercises significant influence over the investee, but does not have operating control, generally between 20% and 50% ownership. Under the equity method of accounting, original investments are recorded at cost in prepaid expenses and other assets on the Consolidated Statements of Financial Condition and adjusted by the Company’s proportionate share of the investees’ undistributed earnings or losses. Equity investments are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of the investment may not be recoverable.

Earnings Per Share

Basic earnings per share is computed by dividing the net income attributable to common stock by the weighted-average number of shares of common stock outstanding during the period. For purposes of computing diluted earnings per share, the weighted-average shares outstanding of common stock reflects the dilutive effect that could occur if convertible securities or other contracts to issue common stock were converted into or exercised for common stock.

Use of Estimates

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 at 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.

Recent Accounting Pronouncements

In December 2023, the Financial Accounting Standards Board (the “FASB”) issued Accounting Standards Update (“ASU”) 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures. The ASU requires disaggregated information about a reporting entity’s effective tax rate reconciliation and income taxes paid. The ASU is effective for the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2025. The guidance may be applied on a prospective or retrospective basis and early adoption is permitted. Adoption of this ASU will result in additional disclosures, but will not have an impact on the Company’s consolidated statements of financial condition, operations and cash flows.

In November 2024, the FASB issued ASU 2024-03, Disaggregation of Income Statement Expenses. The ASU primarily will require enhanced disclosures about certain types of expenses. The amendments in ASU 2024-03 are effective for fiscal years beginning after December 15, 2026 and interim periods within fiscal years beginning after December 15, 2027, and may be applied either on a prospective or retrospective basis. The Company is currently evaluating the impact of the standard on its disclosures.

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Regulatory Capital Requirements

3 Months Ended

Mar. 31, 2025

Broker-Dealer [Abstract]

Regulatory Capital Requirements

3. Regulatory Capital Requirements

Certain of the Company’s U.S. subsidiaries are registered as broker-dealers and are subject to the applicable rules and regulations of the SEC, the Financial Industry Regulatory Authority (“FINRA”) and the Commodity Futures Trading Commission (“CFTC”). These rules contain minimum net capital requirements, as defined in the applicable regulations. Certain of the Company’s foreign subsidiaries are regulated by the Financial Conduct Authority (“FCA”) in the United Kingdom (“U.K.”) or other foreign regulators and must maintain financial resources, as defined in the applicable regulations, in excess of the applicable financial resources requirement. As of March 31, 2025, each of the Company’s subsidiaries that are subject to these regulations had net capital or financial resources in excess of their minimum requirements. As of March 31, 2025, the Company’s subsidiaries maintained aggregate net capital and financial resources that were $552.1 million in excess of the required levels of $36.6 million.

One of the Company’s U.S. broker-dealer subsidiaries is required to segregate funds in a special reserve bank account for the benefit of customers pursuant to Rule 15c3-3 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”). As of March 31, 2025, this U.S. broker-dealer subsidiary had a balance of $47.5 million in its special reserve bank account. This U.S. broker-dealer subsidiary also maintained net capital that was $285.5 million in excess of the required level of $4.0 million.

Each of the Company’s U.S. and foreign regulated subsidiaries are subject to local regulations which generally limit, or require the prior notification to or approval from such regulated entity’s principal regulator before, the repayment of borrowings from the Company or affiliates, paying cash dividends, making loans to the Company or affiliates or otherwise entering into transactions that result in a significant reduction in regulatory net capital or financial resources.

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Fair Value Measurements

3 Months Ended

Mar. 31, 2025

Fair Value Disclosures [Abstract]

Fair Value Measurements

4. Fair Value Measurements

The following table summarizes the valuation of the Company’s assets and liabilities measured at fair value as categorized based on the hierarchy described in Note 2:

	Level 1		Level 2		Level 3		Total
	(In thousands)
As of March 31, 2025
Assets
Money market funds	$	77,532	$	—	$	—	$	77,532
Securities available-for-sale
Corporate debt		—		55,677		—		55,677
Trading securities
U.S. Treasuries		—		100,167		—		100,167
Mutual funds held in rabbi trust		—		10,269		—		10,269
Foreign currency forward position		—		2,619		—		2,619
Total assets	$	77,532	$	168,732	$	—	$	246,264
As of December 31, 2024
Assets
Money market funds	$	55,473	$	—	$	—	$	55,473
Securities available-for-sale
Corporate debt		—		55,108		—		55,108
Trading securities
U.S. Treasuries		—		99,045		—		99,045
Mutual funds held in rabbi trust		—		11,107		—		11,107
Total assets	$	55,473	$	165,260	$	—	$	220,733
Liabilities
Foreign currency forward position		—		936		—		936
Total liabilities	$	—	$	936	$	—	$	936

Money market funds are included in cash and cash equivalents on the Consolidated Statements of Financial Condition. Securities available-for-sale and trading securities are included in investments, at fair value on the Consolidated Statements of Financial Condition. Securities classified within Level 2 were valued using a market approach utilizing prices and other relevant information generated by market transactions involving comparable assets. The foreign currency forward contracts are included in either other assets or accounts payable, accrued expenses and other liabilities on the Consolidated Statements of Financial Condition, and are classified within Level 2 as the valuation inputs are based on quoted market prices. The mutual funds held in a rabbi trust represent investments associated with the Company’s deferred cash incentive plan.

During each of the three months ended March 31, 2025 and 2024, there were no transfers of securities between Level 1, Level 2 and Level 3.

The table below presents the carrying value, fair value and fair value hierarchy category of the Company’s financial assets and liabilities that are not measured at fair value on the Consolidated Statements of Financial Condition. The carrying values of the Company’s financial assets and liabilities not measured at fair value categorized in the fair value hierarchy as Level 1 and Level 2 approximate fair value due to the short-term nature of the underlying assets and liabilities.

	Carrying Value		Fair Value		Level 1		Level 2		Level 3		Total
	(In thousands)
As of March 31, 2025
Financial assets not measured at fair value:
Cash	$	408,692	$	408,692	$	408,692	$	—	$	—	$	408,692
Cash segregated under federal regulations		47,514		47,514		47,514		—		—		47,514
Accounts receivable, net of allowance		109,171		109,171		—		109,171		—		109,171
Receivables from broker-dealers, clearing    organizations and customers		493,613		493,613		110,544		383,069		—		493,613
Total	$	1,058,990	$	1,058,990	$	566,750	$	492,240	$	—	$	1,058,990
Financial liabilities not measured at fair value:
Payables to broker-dealers, clearing    organizations and customers	$	318,866	$	318,866	$	—	$	318,866	$	—	$	318,866
As of December 31, 2024
Financial assets not measured at fair value:
Cash	$	489,005	$	489,005	$	489,005	$	—	$	—	$	489,005
Cash segregated under federal regulations		47,107		47,107		47,107		—		—		47,107
Accounts receivable, net of allowance		91,845		91,845		—		91,845		—		91,845
Receivables from broker-dealers, clearing    organizations and customers		357,728		357,728		107,652		250,076		—		357,728
Total	$	985,685	$	985,685	$	643,764	$	341,921	$	—	$	985,685
Financial liabilities not measured at fair value:
Payables to broker-dealers, clearing    organizations and customers	$	218,845	$	218,845	$	—	$	218,845	$	—	$	218,845

The Company enters into foreign currency forward contracts as an economic hedge against certain foreign currency transaction gains and losses in the Consolidated Statements of Operations. These forward contracts are for three-month periods and are used to limit exposure to foreign currency exchange rate fluctuations. The Company records the fair value of the asset in prepaid expenses and other assets or the fair value of the liability in accounts payable, accrued expenses and other liabilities in the Consolidated Statements of Financial Condition. The following table summarizes the Company’s foreign currency forward position:

Realized and unrealized gains and losses on foreign currency forward contracts are included in other, net in the Consolidated Statements of Operations. The following table summarizes the realized and unrealized gains and losses on foreign currency forward contracts:

	As of
	March 31, 2025		December 31, 2024
	(In thousands)
Notional value	$	61,958	$	64,454
Fair value of notional		64,577		63,518
Fair value of the asset/(liability)	$	2,619	$	(936	)

	Three Months Ended March 31,
	2025			2024
	(In thousands)
Unrealized gain/(loss)	$	3,556		$	(2,098	)
Realized gain/(loss)		(1,693	)		1,323
Total gain/(loss)	$	1,863		$	(775	)

The Company records cash collateral deposits with its counterparty bank in prepaid expenses and other assets on the Consolidated Statements of Financial Condition. As of March 31, 2025, the Company did not maintain a cash collateral deposit with its counterparty bank.

The following table summarizes the Company’s investments:

	Amortized cost			Gross unrealized gains		Gross unrealized losses			Fair value
		(In thousands)
As of March 31, 2025
Securities available-for-sale
Corporate debt	$		55,708	$	165	$	(196	)	$	55,677
Trading securities
U.S. Treasuries			100,468		131		(432	)		100,167
Mutual funds held in rabbi trust			9,867		488		(86	)		10,269
Total investments	$		166,043	$	784	$	(714	)	$	166,113
As of December 31, 2024
Securities available-for-sale
Corporate debt	$		55,447	$	88	$	(427	)	$	55,108
Trading securities
U.S. Treasuries			100,484		86		(1,525	)		99,045
Mutual funds held in rabbi trust			10,212		900		(5	)		11,107
Total investments	$		166,143	$	1,074	$	(1,957	)	$	165,260

Purchases of investments during the three months ended March 31, 2025 and 2024 were $5.5 million and $5.0 million, respectively. Proceeds from the sales and maturities of investments during the three months ended March 31, 2025 and 2024 were $5.3 million and $4.3 million, respectively.

The following table summarizes the Company’s unrealized and realized gains and losses on investments:

	Three Months Ended March 31,
	2025			2024
	(In thousands)
Unrealized gains/(losses)
Securities available-for-sale
Corporate debt	$	307		$	(73	)
Trading securities
U.S. Treasuries		1,066			(255	)
Mutual funds held in rabbi trust		(493	)		674
Total investments	$	880		$	346
Realized gains/(losses)
Securities available-for-sale
Corporate debt	$	—		$	2
Trading securities
Mutual funds held in rabbi trust		47			35
Total investments	$	47		$	37

Unrealized gains and losses on securities available-for-sale are included in accumulated other comprehensive loss on the Consolidated Statements of Financial Condition. Realized gains and losses on securities available-for-sale and realized and unrealized gains and losses on trading securities are included in other, net on the Consolidated Statements of Operations.

The following table summarizes the fair value of the Company’s corporate debt and U.S. Treasury investments based upon the contractual maturities:

	Less than one year		Due in 1 - 5 years		Total
	(In thousands)
As of March 31, 2025
Securities available-for-sale
Corporate debt	$	8,536	$	47,141	$	55,677
Trading securities
U.S. Treasuries		50,051		50,116		100,167
Total	$	58,587	$	97,257	$	155,844
As of December 31, 2024
Securities available-for-sale
Corporate debt	$	9,346	$	45,762	$	55,108
Trading securities
U.S. Treasuries		49,978		49,067		99,045
Total	$	59,324	$	94,829	$	154,153

The following table provides fair values and unrealized losses on the Company’s available-for-sale investments and the aging of securities’ continuous unrealized loss positions:

	Less than Twelve Months					Twelve Months or More					Total
	Fair value		Gross unrealized losses			Fair value		Gross unrealized losses			Fair value		Gross unrealized losses
	(In thousands)
As of March 31, 2025
Corporate debt	$	30,855	$	(196	)	$	230	$	—		$	31,085	$	(196	)
As of December 31, 2024
Corporate debt	$	38,041	$	(426	)	$	1,226	$	(1	)	$	39,267	$	(427	)

During each of the three months ended March 31, 2025 and 2024, the Company did not recognize any credit losses on its available-for-sale securities. The unrealized losses on securities are due to changes in interest rates and market liquidity.

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Receivables from and Payables to Broker-dealers, Clearing organizations and Customers

3 Months Ended

Mar. 31, 2025

Due to and from Broker-Dealers and Clearing Organizations [Abstract]

Receivables from and Payables to Broker-dealers, Clearing Organizations and Customers

5. Receivables from and Payables to Broker-dealers, Clearing Organizations and Customers

Receivables from and payables to broker-dealers, clearing organizations and customers consisted of the following:

	As of
	March 31, 2025		December 31, 2024
Receivables from broker-dealers, clearing organizations and customers:	(In thousands)
Securities failed-to-deliver – broker-dealers and clearing organizations	$	136,018	$	109,307
Securities failed-to-deliver – customers		242,028		136,424
Cash deposits with clearing organizations and broker-dealers		110,544		107,652
Other		5,023		4,345
Total	$	493,613	$	357,728
Payables to broker-dealers, clearing organizations and customers:
Securities failed-to-receive – broker-dealers and clearing organizations	$	214,810	$	158,694
Securities failed-to-receive – customers		93,716		51,916
Other		10,340		8,235
Total	$	318,866	$	218,845

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Acquisitions and Equity Investments

3 Months Ended

Mar. 31, 2025

Business Combinations [Abstract]

Acquisitions and Equity Investments

6. Acquisitions and Equity Investments

RFQ Hub LLC Equity Investment

In May 2022, the Company invested $34.4 million to acquire a minority ownership stake in RFQ–hub Holdings LLC, an entity formed with a consortium of market participants to support the growth of RFQ-hub, a multi-asset request for quote platform. The Company possesses significant influence over RFQ–hub Holdings LLC and is accounting for its investment under the equity method of accounting. As of March 31, 2025, the Company’s investment is recorded at carrying value of $34.7 million within prepaid expenses and other assets on the Consolidated Statements of Financial Condition. The Company’s proportionate share of RFQ–hub Holdings LLC’s net earnings is recorded within equity in earnings of unconsolidated affiliate on the Consolidated Statements of Operations and was $0.3 million and $0.4 million for the three months ended March 31, 2025 and 2024, respectively.

Under a services agreement, the Company charges its equity method investee for certain reimbursable support costs incurred by the Company, including personnel compensation, and certain operational overhead costs. The amounts billed for the three months ended March 31, 2025 and 2024 were $0.6 million and $0.5 million, respectively, and are included within other, net on the Consolidated Statements of Operations. The receivable from the equity method investee was $0.6 million as of March 31, 2025 and is included within accounts receivable, net on the Consolidated Statements of Financial Condition.

On April 19, 2024, the Company entered into an agreement to acquire a controlling interest in RFQ–hub Holdings LLC for approximately $37.9 million of cash consideration. The acquisition is subject to various closing conditions, including the receipt of certain regulatory approvals. Upon the closing of the acquisition, the Company will hold approximately a 90.0% controlling stake in RFQ-hub Holdings LLC.

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Goodwill and Intangible Assets

3 Months Ended

Mar. 31, 2025

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Intangible Assets

7. Goodwill and Intangible Assets

Goodwill and intangible assets with indefinite lives were $236.7 million as of each of March 31, 2025 and December 31, 2024. Intangible assets that are subject to amortization, including the related accumulated amortization, are comprised of the following:

	March 31, 2025							December 31, 2024
	Cost		Accumulated amortization			Net carrying amount		Cost		Accumulated amortization			Net carrying amount
	(In thousands)
Customer relationships	$	139,551	$	(68,612	)	$	70,939	$	138,089	$	(64,698	)	$	73,391
Technology and other intangibles		41,130		(17,639	)	$	23,491		41,130		(16,443	)	$	24,687
Total	$	180,681	$	(86,251	)	$	94,430	$	179,219	$	(81,141	)	$	98,078

Amortization expense associated with identifiable intangible assets was $4.4 million and $5.0 million for the three months ended March 31, 2025 and 2024, respectively. Annual estimated total amortization expense is $16.9 million, $15.2 million, $13.8 million, $12.3 million and $11.3 million for the years ended December 31, 2025 through 2029, respectively.

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Income Taxes

3 Months Ended

Mar. 31, 2025

Income Tax Disclosure [Abstract]

Income Taxes

8. Income Taxes

The Company’s provision for income taxes includes U.S. federal, state and local, and foreign taxes. The provision for income taxes was $81.1 million and $24.1 million for the three months ended March 31, 2025 and 2024, respectively. The Company’s effective tax rate was 84.3% and 24.9% for the three months ended March 31, 2025 and 2024, respectively. The Company’s effective tax rate can vary from period to period depending on the geographic mix of our earnings, changes in tax legislation and tax rates, changes in unrecognized tax benefits and the amount and timing of excess tax benefits related to stock-based payments, among other factors.

During the first quarter of 2025, a New York state tax court issued a decision in a matter that impacted the Company’s assessment of its uncertain tax positions. The Company was not a party to that case, but its historical tax filing position was not supported by the court’s decision. This decision reversed a lower administrative court’s ruling that had been supportive of the Company’s filing position. The provision for income taxes for the three months ended March 31, 2025 includes provisions for unrecognized tax benefits of $54.9 million and $1.4 million related to the Company’s uncertain tax positions from prior periods and the current period, respectively. As of March 31, 2025, the Company’s liability for unrecognized tax benefits was $56.4 million.

The Company or one of its subsidiaries files U.S. federal, state and foreign income tax returns. The Company is currently under a New York State income tax examination for tax years 2015 through 2020 and a New York City income tax examination for the tax years 2016 through 2018. At this time, the Company cannot estimate when the examinations will conclude or the impact such examinations will have on the Company’s Consolidated Financial Statements, if any. Generally, other than the New York City and New York State audits, the Company is no longer subject to tax examinations by tax authorities for years prior to 2020.

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Stock-Based Compensation Plans

3 Months Ended

Mar. 31, 2025

Share-Based Payment Arrangement [Abstract]

Stock-Based Compensation Plans

9. Stock-Based Compensation Plans

Equity Incentive Plan

The Company maintains the MarketAxess Holdings Inc. 2020 Equity Incentive Plan (the “2020 Plan”), which provides for the grant of restricted stock, restricted stock units, performance shares, performance stock units (collectively, “Full Value Awards”), stock options and other stock-based awards as incentives to encourage employees, consultants and non-employee directors to participate in the long-term success of the Company. As of March 31, 2025, there were 2,421,057 shares available for grant under the 2020 Plan.

Total stock-based compensation expense was as follows:

	Three Months Ended March 31,
	2025		2024
	(In thousands)
Employees	$	6,822	$	6,893
Non-employee directors and consultants		874		405
Total stock-based compensation	$	7,696	$	7,298

The Company records stock-based compensation expense for employees in employee compensation and benefits and for non-employee directors and consultants in general and administrative expenses in the Consolidated Statements of Operations. Total stock-based compensation for employees includes $0.4 million and $0.2 million of capitalized software development costs for the three months ended March 31, 2025 and 2024, respectively.

During the three months ended March 31, 2025, the Company granted (i) 146,977 restricted stock units, (ii) 20,606 stock options and (iii) performance stock units with an expected pay-out at target of 35,549 shares of common stock. The fair values of the restricted stock units and performance stock units were based on a weighted-average fair value per unit at the grant date of $193.75 and $193.49, respectively. The weighted-average fair value for stock options of $67.20 per share was based on the Black-Scholes option pricing model.

As of March 31, 2025, the total unrecognized compensation cost related to all non-vested awards was $68.7 million. That cost is expected to be recognized over a weighted-average period of 2.3 years.

Employee Stock Purchase Plan

The Company maintains the MarketAxess Holdings Inc. 2022 Employee Stock Purchase Plan (the “ESPP”). During the three months ended March 31, 2025, the Company issued 5,698 shares of common stock under the ESPP. As of March 31, 2025, there were 102,357 shares available for purchase under the ESPP.

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Earnings Per Share

3 Months Ended

Mar. 31, 2025

Earnings Per Share [Abstract]

Earnings Per Share

10. Earnings Per Share

The following table sets forth basic and diluted weighted average shares outstanding used to compute earnings per share:

		Three Months Ended March 31,
		2025		2024
	(In thousands, except per share amounts)
Basic weighted average shares outstanding			37,388		37,740
Dilutive effect of stock options and full value awards			68		50
Diluted weighted average shares outstanding			37,456		37,790
Basic earnings per share		$	0.40	$	1.92
Diluted earnings per share			0.40		1.92

Stock options and Full Value Awards totaling 312,466 shares and 571,145 shares for the three months ended March 31, 2025 and 2024, respectively, were excluded from the computation of diluted earnings per share because their effect would have been antidilutive. The computation of diluted shares can vary among periods due, in part, to the change in the average price of the Company’s common stock.

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Credit Agreements and Short-term Financing

3 Months Ended

Mar. 31, 2025

Debt Disclosure [Abstract]

Credit Agreements and Short-term Financing

11. Credit Agreements and Short-term Financing

Credit Agreement

On August 9, 2023, the Company entered into a three-year revolving credit facility (the “Credit Agreement”) provided by a syndicate of lenders and JPMorgan Chase Bank, N.A., as administrative agent, which provides aggregate commitments totaling $750.0 million, including a revolving credit facility, a $5.0 million letter of credit sub-limit for standby letters of credit and a $380.0 million sub-limit for swingline loans. The Credit Agreement will mature on August 9, 2026, with the Company’s option to request up to two additional 364-day extensions at the discretion of each lender and subject to customary conditions. Subject to satisfaction of certain specified conditions, the Company is permitted to upsize the Credit Agreement by up to $375.0 million in total. As of March 31, 2025, the Company had $0.1 million in letters of credit outstanding and $749.9 million in available borrowing capacity under the Credit Agreement.

Borrowings under the Credit Agreement will bear interest at a rate per annum equal to an alternate base rate or the adjusted term Secured Overnight Financing Rate (“SOFR”) rate, plus an applicable margin that varies with the Company’s consolidated total leverage ratio. The Credit Agreement requires that the Company satisfy certain covenants, including a requirement not to exceed a maximum consolidated total leverage ratio. The Company incurred no interest expense under the Credit Agreement for each of the three months ended March 31, 2025 and 2024.

Uncommitted Collateralized Agreements

In connection with their self-clearing operations, certain of the Company’s U.S. and U.K. operating subsidiaries maintain agreements with a settlement bank to allow the subsidiaries to borrow in the aggregate of up to $500.0 million on an uncommitted basis, collateralized by eligible securities pledged by the subsidiaries to the settlement bank, subject to certain haircuts. Borrowings under these agreements will bear interest at a base rate per annum equal to the higher of the upper range of the Federal Funds Rate, 0.25% or one-month SOFR, plus 1.00%.

The Company incurred no interest expense on borrowings under such agreements during each of the three months ended March 31, 2025 and 2024. As of March 31, 2025, the Company had no borrowings outstanding and up to $500.0 million in available uncommitted borrowing capacity under such agreements.

Short-term Financing

Under arrangements with their settlement banks, certain of the Company’s U.S. and U.K. operating subsidiaries may receive overnight financing in the form of bank overdrafts. The Company incurred interest expense on such overnight financing of $0.2 million and $0.3 million during the three months ended March 31, 2025 and 2024, respectively. As of March 31, 2025, the Company had no overdrafts payable outstanding.

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Leases

3 Months Ended

Mar. 31, 2025

Leases [Abstract]

Leases

12. Leases

The Company has operating leases for corporate offices with initial lease terms ranging from one year to 15 years. Certain leases contain options to extend the initial term at the Company’s discretion. The Company accounts for the option to extend when it is reasonably certain of being exercised. The Company’s lease agreements do not contain any material residual value guarantees, restrictions or covenants. The Company also has operating and finance leases for equipment with initial lease terms ranging from one-year to 5 years.

The following table presents the components of operating lease expense for the three months ended March 31, 2025 and 2024:

		Three Months Ended March 31,
Lease cost:	Classification	2025		2024
		(In thousands)
Operating lease cost - office space	Occupancy	$	2,751	$	2,753
Operating lease cost - equipment	Technology and communications		98		98
Variable lease costs	Occupancy		785		587
Total operating lease cost		$	3,634	$	3,438

Finance lease expense was $0.1 million for each of the three months ended March 31, 2025 and 2024.

The Company determines whether an arrangement is, or includes, a lease at contract inception. Operating lease right-of-use assets and liabilities are recognized at commencement date and are initially measured based on the present value of lease payments over the defined lease term. As the Company’s leases do not provide an implicit rate, the Company used its incremental borrowing rate based on the information available at the adoption date in determining the present value of lease payments.

The weighted average remaining lease term and weighted average discount rate are as follows:

	As of
Lease Term and Discount Rate	March 31, 2025			December 31, 2024
Weighted average remaining lease term (in years) - operating leases		8.6			8.8
Weighted average discount rate - operating leases		6.1	%		6.1	%
Weighted average remaining lease term (in years) - finance leases		0.5			0.8
Weighted average discount rate - finance leases		7.2	%		7.2	%

The following table presents the maturity of lease liabilities as of March 31, 2025:

	Operating Leases		Finance Leases
	(In thousands)
Remainder of 2025	$	9,611		59
2026		12,233		—
2027		9,321		—
2028		8,692		—
2029		8,994		—
2030 and thereafter		42,199		—
Total lease payments		91,050		59
Less: imputed interest		20,247		1
Present value of lease liabilities	$	70,803	$	58

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Commitments and Contingencies

3 Months Ended

Mar. 31, 2025

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

13. Commitments and Contingencies

Legal

In the normal course of business, the Company and its subsidiaries included in the consolidated financial statements may be involved in various lawsuits, proceedings and regulatory examinations. The Company assesses its liabilities and contingencies in connection with outstanding legal proceedings, if any, utilizing the latest information available. For matters where it is probable that the Company will incur a material loss and the amount can be reasonably estimated, the Company will establish an accrual for the loss. Once established, the accrual will be adjusted to reflect any relevant developments. When a loss contingency is not both probable and estimable, the Company does not establish an accrual.

Based on currently available information, the outcome of the Company’s outstanding matters is not expected to have a material adverse impact on the Company’s financial position. It is not presently possible to determine the ultimate exposure to these matters, and there is no assurance that the resolution of the outstanding matters will not significantly exceed any reserves accrued by the Company.

Other

The Company, through certain of its subsidiaries, executes securities transactions between its institutional investor and broker-dealer clients on a matched principal basis by serving as counterparty to both the buyer and the seller in trades. The Company’s operating subsidiaries settle such transactions pursuant to their self-clearing operations or through the use of third-party clearing brokers or settlement agents. Settlement typically occurs within one to two trading days after the trade date. Cash settlement of the transaction occurs upon receipt or delivery of the underlying instrument that was traded. Under both the self-clearing and the third-party clearing models, the Company may be exposed to credit risk in the event a counterparty does not fulfill its obligation to complete a transaction or if there is an error in executing a matched principal transaction. Pursuant to the terms of the securities clearing agreements, each third-party clearing broker has the right to charge the Company for any losses they suffer resulting from a counterparty’s failure on any of the Company’s trades. The Company did not record any liabilities or losses with regard to counterparty failures for the three months ended March 31, 2025 and 2024.

In the normal course of business, the Company enters into contracts that contain a variety of representations, warranties and indemnification provisions. The Company’s maximum exposure under these arrangements is unknown, as this would involve future claims that may be made against the Company that have not yet occurred. However, based on experience, the Company expects the risk of loss to be remote.

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Share Repurchase Programs

3 Months Ended

Mar. 31, 2025

Equity [Abstract]

Share Repurchase Programs

14. Share Repurchase Programs

In January 2022, the Board of Directors authorized a share repurchase program for up to $150.0 million (the “2022 Repurchase Program”). In August 2024, the Board of Directors authorized a share repurchase program for up to an additional $200.0 million (the “2024 Repurchase Program” and, together with the 2022 Repurchase Program, the “Repurchase Programs”). The Repurchase Programs do not have an expiration date. During the three months ended March 31, 2025, the Company repurchased 187,905 shares of common stock under the Repurchase Programs at a cost of $38.1 million. As of March 31, 2025, the 2022 Repurchase Plan has been exhausted and the Company had $187.0 million of remaining capacity under the 2024 Repurchase Program. Shares repurchased under the Repurchase Programs will be held in treasury for future use.

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Segment and Geographic Information

3 Months Ended

Mar. 31, 2025

Segment Reporting [Abstract]

Segment and Geographic Information

15. Segment and Geographic Information

The Company’s end-to-end trading solutions comprise one reportable segment. The Company’s end-to-end trading solutions segment includes the operation of electronic platforms for the trading of fixed-income and other securities and related data, analytics, compliance tools, post-trade services and technology services. The Company derives revenue primarily in North America and Europe and manages its business activities on a consolidated basis. The Company considers its operations to constitute a single business segment due to the highly integrated nature of these products and services within the trading lifecycle, the use of a single inter-connected suite of technology solutions underlying all services, the financial markets in which the Company competes and the Company’s worldwide business activities.

The accounting policies of the Company’s reportable segment are the same as those described in the summary of significant accounting policies. The Company’s chief operating decision maker (“CODM”) assesses performance of the Company overall and decides how to allocate resources based on net income that is reported on the consolidated statement of operations as net income. The measure of segment assets is reported on the consolidated statement of financial condition as total assets. The Company’s CODM is its Chief Executive Officer. The CODM uses net income to evaluate income generated from segment assets in deciding whether to reinvest profits into the Company’s end-to-end trading solutions or into other areas, such as for acquisitions or to pay dividends. Net income is used to monitor budget versus actual results. The significant segment expenses and net income reviewed by the CODM conform to the presentation of such items in the consolidated statements of operations.

For the three months ended March 31, 2025 and 2024, the U.K. was the only individual foreign country in which the Company had operations that accounted for 10.0% or more of total revenues or total long-lived assets. Revenues and long-lived assets are attributed to a geographic area based on the location of the client trading activity and receipt of services. Long-lived assets are defined as furniture, equipment, leasehold improvements and capitalized software. Revenues for the three months ended March 31, 2025 and 2024, and long-lived assets as of March 31, 2025 and December 31, 2024 were as follows:

	Three Months Ended March 31,
	2025		2024
	(In thousands)
Revenues
United States	$	142,660	$	145,275
United Kingdom		42,729		41,220
Other		23,187		23,823
Total	$	208,576	$	210,318

	As of
	March 31, 2025		December 31, 2024
	(In thousands)
Long-lived assets, as defined
United States	$	94,594	$	92,983
United Kingdom		11,736		12,683
Other		1,528		1,632
Total	$	107,858	$	107,298

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Cash and Cash Equivalents and Restricted Cash

3 Months Ended

Mar. 31, 2025

Cash and Cash Equivalents [Abstract]

Cash and Cash Equivalents and Restricted Cash

16. Cash and Cash Equivalents and Restricted Cash

The following table provides a reconciliation of cash and cash equivalents together with restricted or segregated cash as reported within the Consolidated Statements of Financial Condition to the sum of the same such amounts shown in the Consolidated Statements of Cash Flows:

		As of
	Statement of Financial Condition Location	March 31, 2025		December 31, 2024
		(In thousands)
Cash and cash equivalents	Cash and cash equivalents	$	486,224	$	544,478
Cash segregated for regulatory    purposes	Cash segregated under federal    regulations		47,514		47,107
Restricted cash deposits with clearing    organizations and broker-dealers	Receivables from broker-dealers,    clearing organizations    and customers		110,544		107,652
Other cash deposits	Prepaid expenses and other assets		172		1,222
Total		$	644,454	$	700,459

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Significant Accounting Policies (Policies)

3 Months Ended

Mar. 31, 2025

Accounting Policies [Abstract]

Basis of Presentation

Basis of Presentation

The consolidated financial statements include the accounts of the Company and its subsidiaries. All intercompany transactions and balances have been eliminated. These consolidated financial statements are unaudited and should be read in conjunction with the audited consolidated financial statements included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2024. The consolidated financial information as of December 31, 2024 has been derived from audited financial statements not included herein. These unaudited consolidated financial statements are prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) and the rules and regulations of the U.S. Securities and Exchange Commission (“SEC”) with respect to Form 10-Q and reflect all adjustments that, in the opinion of management, are normal and recurring, and that are necessary for a fair statement of the results for the interim periods presented. In accordance with such rules and regulations, certain disclosures that are normally included in annual financial statements have been omitted. Interim period operating results may not be indicative of the operating results for a full year.

Cash and Cash Equivalents

Cash and Cash Equivalents

The Company defines cash equivalents as short-term interest-bearing investments with maturities at the time of purchase of three months or less.

Investments

Investments

The Company determines the appropriate classification of securities at the time of purchase which are recorded in the Consolidated Statements of Financial Condition on the trade date. Securities are classified as available-for-sale or trading. Available-for-sale investments are carried at fair value with unrealized gains or losses reported in accumulated other comprehensive loss in the Consolidated Statements of Financial Condition and realized gains or losses reported in other, net in the Consolidated Statements of Operations. Trading investments include U.S. Treasuries and are carried at fair value, with realized and unrealized gains or losses included in other, net in the Consolidated Statements of Operations.

The Company assesses whether an impairment loss on its available-for-sale debt securities has occurred due to declines in fair value or other market conditions. When the amortized cost basis of an available-for-sale debt security exceeds its fair value, the security is deemed to be impaired. The portion of an impairment related to credit losses is determined by comparing the present value of cash flows expected to be collected from the security with the amortized cost basis of the security and is recorded as a charge in the Consolidated Statements of Operations. The remainder of an impairment is recognized in accumulated other comprehensive loss if the Company does not intend to sell the security and it is more likely than not that the Company will not be required to sell the security prior to recovery.

Fair Value Financial Instruments

Fair Value Financial Instruments

Fair value is defined as “the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date.” A three-tiered hierarchy for determining fair value has been established that prioritizes inputs to valuation techniques used in fair value calculations. The three levels of inputs are defined as Level 1 (unadjusted quoted prices for identical assets or liabilities in active markets), Level 2 (inputs that are observable in the marketplace other than those inputs classified in Level 1) and Level 3 (inputs that are unobservable in the marketplace). The Company’s financial assets and liabilities measured at fair value on a recurring basis consist of its money market funds, trading securities, available-for-sale securities and foreign currency forward contracts. All other financial instruments are short-term in nature and the carrying amounts reported on the Consolidated Statements of Financial Condition approximate fair value.

Receivables from and Payables to Broker - dealers, Clearing Organizations and Customers

Receivables from and Payables to Broker-dealers, Clearing Organizations and Customers

Receivables from broker-dealers, clearing organizations and customers include amounts receivable for securities not delivered by the Company to the purchaser by the settlement date (“securities failed-to-deliver”) and cash deposits held at clearing organizations and clearing brokers to facilitate the settlement and clearance of matched principal transactions. Payables to broker-dealers, clearing organizations and customers include amounts payable for securities not received by the Company from a seller by the settlement date (“securities failed-to-receive”). Securities failed-to-deliver and securities failed-to-receive for transactions executed on a matched principal basis where the Company serves as a counterparty to both the buyer and the seller are recorded on a settlement date basis. The Company presents its securities failed-to-deliver and securities failed-to-receive balances on a net-by-counterparty basis within receivables from and payables to broker-dealers, clearing organizations and customers. The difference between the Company’s trade-date receivables and payables for unsettled matched principal transactions reflects commissions earned and is recorded within accounts receivable, net on a trade date basis.

Allowance for Credit Losses

Allowance for Credit Losses

All accounts receivable have contractual maturities of less than one year and are derived from trading-related fees and commissions and revenues from products and services. The Company continually monitors collections and payments from its customers and maintains an allowance for doubtful accounts. The allowance for credit losses is based on the estimated expected credit losses in accounts receivable, as determined from a review of aging schedules, past due balances, historical collection experience and other specific collection issues that have been identified. Account balances are grouped for evaluation based on various risk characteristics, including billing type, legal entity, and geographic region. Additions to the allowance for credit losses are charged to bad debt expense, which is included in general and administrative expense in the Company’s Consolidated Statements of Operations. Balances that are determined to be uncollectable are written off against the allowance for credit losses.

The allowance for credit losses was $0.7 million and $1.0 million as of March 31, 2025 and December 31, 2024, respectively. The provision for bad debts was $0.2 million and $0.1 million for the three months ended March 31, 2025 and 2024, respectively. Write-offs and other charges against the allowance for credit losses were $0.3 million for the three months ended March 31, 2025 and immaterial for the three months ended March 31, 2024.

Depreciation and Amortization

Depreciation and Amortization

Fixed assets are carried at cost less accumulated depreciation. The Company uses the straight-line method of depreciation over three to seven years. The Company amortizes leasehold improvements on a straight-line basis over the lesser of the life of the improvement or the remaining term of the lease.

Software Development Costs

Software Development Costs

The Company capitalizes certain costs associated with the development of internal use software, including, among other items, employee compensation and related benefits and third-party consulting costs at the point at which the conceptual formulation, design and testing of possible software project alternatives have been completed. Once the product is ready for its intended use, such costs are amortized on a straight-line basis over three to five years. The Company reviews the amounts capitalized for impairment whenever events or changes in circumstances indicate that the carrying amounts of the assets may not be recoverable.

Foreign Currency Translation and Forward Contracts

Foreign Currency Translation and Forward Contracts

Assets and liabilities denominated in foreign currencies are translated using exchange rates at the end of the period; revenues and expenses are translated at average monthly rates. Gains and losses on foreign currency translation are a component of accumulated other comprehensive loss in the Consolidated Statements of Financial Condition. Transaction gains and losses are recorded in other, net in the Consolidated Statements of Operations.

The Company enters into foreign currency forward contracts to economically hedge its foreign currency transaction gains and losses. Realized and unrealized gains and losses on these forward contracts are included in other, net in the Consolidated Statements of Operations. The Company records the fair value of the forward contract asset in prepaid expenses and other assets or the fair value of the forward contract liability in accounts payable, accrued expenses and other liabilities in the Consolidated Statements of Financial Condition.

Revenue Recognition

Revenue Recognition

The Company’s classification of revenues in the Consolidated Statements of Operations represents revenues from contracts with customers disaggregated by type of revenue. The Company has four revenue streams as described below.

Commission Revenue – The Company charges its broker-dealer clients variable transaction fees for trades executed on its platforms and, under certain plans, distribution fees or monthly minimum fees to use the platforms for a particular product area. Variable transaction fees are recognized on a trade date basis, are generally calculated as a percentage of the notional dollar volume of bonds traded on the platforms and vary based on the type, size, yield and maturity of the bond traded, as well as individual client incentives. Bonds that are more actively traded or that have shorter maturities generally generate lower commissions, while bonds that are less actively traded or that have longer maturities generally command higher commissions. Under the Company’s disclosed trading transaction fee plans, variable transaction fees, distribution fees and unused monthly fee commitments are invoiced and recorded on a monthly basis.

For Open Trading trades that the Company executes between and among institutional investor and broker-dealer clients on a matched principal basis by serving as counterparty to both the buyer and the seller, the Company earns its commission through the difference in price between the two trades. The commission is collected upon settlement of the trade, which typically occurs within one to two trading days after the trade date. For the majority of the Company’s U.S. Treasury matched principal trades, commissions are invoiced and recorded on a monthly basis.

Following its acquisition of Pragma LLC and Pragma Financial Systems LLC (collectively, “Pragma”) in the fourth quarter of 2023, the Company also earns other commissions on equities and foreign exchange products for algorithmic trading services. These fees incorporate variable transaction fees, which are calculated as a percentage of the notional dollar volume traded and are billed on a monthly basis.

The following table presents commission revenue by fee type:

	Three Months Ended March 31,
	2025		2024
	(In thousands)
Commission revenue by fee type
Variable transaction fees
Disclosed trading	$	95,455	$	94,778
Open Trading – matched principal trading		43,052		48,180
U.S. government bonds - matched principal trading		4,529		3,712
Other		4,955		4,849
Total variable transaction fees		147,991		151,519
Distribution fees and unused minimum fees		33,352		33,354
Total commissions	$	181,343	$	184,873

Information services – Information services includes data licensed to the Company’s broker-dealer clients, institutional investor clients and data-only subscribers; professional and consulting services; technology software licenses; and maintenance and support services. The nature and timing of each performance obligation may vary as these contracts are either subscription-based services transferred over time, and may be net of volume-based discounts, or one-time services that are transferred at a point in time. Revenues for services transferred over time are recognized ratably over the contract period as the Company’s performance obligation is met, whereas revenues for services transferred at a point in time are recognized in the period the services are provided. Customers are generally billed monthly, quarterly, or annually; revenues billed in advance are deferred and recognized ratably over the contract period. The following table presents information services revenue by timing of recognition:

	Three Months Ended March 31,
	2025		2024
	(In thousands)
Information services revenue by timing    of recognition
Services transferred over time	$	12,699	$	11,874
Services transferred at a point in time		205		7
Total information services revenues	$	12,904	$	11,881

Post-trade services – Post-trade services revenue is generated from regulatory transaction reporting, trade publication and post-trade matching services. Customers are generally billed monthly in arrears, and revenue is recognized in the period transactions are processed. Revenues billed in advance are deferred and recognized ratably over the contract period. The Company also generates one-time implementation fees for onboarding clients, which are invoiced and recognized in the period the implementation is completed. The following table presents post-trade services revenue by timing of recognition:

	Three Months Ended March 31,
	2025		2024
	(In thousands)
Post-trade services revenue by timing    of recognition
Services transferred over time	$	11,049	$	10,540
Services transferred at a point in time		39		190
Total post-trade services revenues	$	11,088	$	10,730

Technology services – Technology services revenue primarily includes technology services revenue generated by Pragma and revenue from telecommunications line charges to broker-dealer clients. Customers may be billed monthly or quarterly in arrears or in advance, and revenue is recognized in the period transactions are processed. Revenues billed in advance are deferred and recognized ratably over the contract period.

The following table presents technology services revenue by timing of recognition:

	Three Months Ended March 31,
	2025		2024
	(In thousands)
Technology services revenue by timing    of recognition
Services transferred over time	$	3,062	$	2,830
Services transferred at a point in time		179		4
Total technology services revenues	$	3,241	$	2,834

Contract liabilities consist of deferred revenues that the Company records when cash payments are received or due in advance of services to be performed. Deferred revenues are included in accounts payable, accrued expenses and other liabilities on the Consolidated Statements of Financial Condition. The revenue recognized from contract liabilities and the remaining balance is shown below:

	December 31, 2024			Payments received in advance of services to be performed		Revenue recognized for services performed during the period			Foreign Currency Translation		March 31, 2025
		(In thousands)
Information services	$		3,302	$	3,043	$	(3,713	)	$	—	$	2,632
Post-trade services			1,286		6,877		(6,251	)		39		1,951
Technology services			415		1,933		(1,980	)		—		368
Total deferred revenue	$		5,003	$	11,853	$	(11,944	)	$	39	$	4,951

The majority of the Company’s information services and post-trade services contracts are short-term in nature with durations of one year or less. For contracts with original durations extending beyond one year, the aggregate amount of the transaction price allocated to remaining performance obligations was $46.0 million as of March 31, 2025. The Company expects to recognize revenue associated with the remaining performance obligations over the next 43 months.

Stock-Based Compensation

Stock-Based Compensation

The Company measures and recognizes compensation expense for all share-based payment awards based on their estimated fair values measured as of the grant date. These costs are recognized as an expense in the Consolidated Statements of Operations over the requisite service period, which is typically the vesting period, with an offsetting increase to additional paid-in capital. Forfeitures are recognized as they occur.

Income Taxes

Income Taxes

Income taxes are accounted for using the asset and liability method. Deferred income taxes reflect the net tax effects of temporary differences between the financial reporting and tax bases of assets and liabilities and are measured using the enacted tax rates and laws that will be in effect when such differences are expected to reverse. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date. A valuation allowance is recognized against deferred tax assets if it is more likely than not that such assets will not be realized in future years. Tax benefits for uncertain tax positions are recognized when it is more likely than not that the positions will be sustained upon examination based on their technical merits. The Company recognizes interest and penalties related to unrecognized tax benefits in the provision for income taxes in the Consolidated Statements of Operations. All tax effects related to share-based payments are recorded in the provision for income taxes in the periods during which the awards are exercised or vest.

Business Combinations, Goodwill and Intangible Assets

Business Combinations, Goodwill and Intangible Assets

Business combinations are accounted for under the purchase method of accounting. The total cost of an acquisition is allocated to the underlying net assets based on their respective estimated fair values. The excess of the purchase price over the estimated fair values of the net assets acquired is recorded as goodwill. Determining the fair value of certain assets acquired and liabilities assumed requires judgment and often involves the use of significant estimates and assumptions, including assumptions with respect to future cash flows, discount rates, revenue growth rates, customer attrition rates, royalty rates, obsolescence and asset lives. Intangible assets are valued using various methodologies, including the relief-from-royalty method and multi-period excess earnings method.

The Company operates as a single reporting unit. Following an acquisition, goodwill no longer retains its identification with a particular acquisition, but instead becomes identifiable with the entire reporting unit. As a result, all of the fair value of the Company is available to support the value of goodwill. An impairment review of goodwill is performed on an annual basis, at year-end, or more frequently if circumstances change. Intangible assets with definite lives, including purchased technologies, customer relationships and other intangible assets, are amortized over their estimated useful lives which range from one to 15 years using either a straight-line or accelerated amortization method based on the pattern of economic benefit the Company expects to realize from such assets. Intangible assets are assessed for impairment when events or circumstances indicate the existence of a possible impairment.

Equity Investments and Consolidation

Equity Investments and Consolidation

The Company evaluates equity investments for potential consolidation under the voting-interest or variable-interest models. The Company consolidates investees over which the Company determines it has control under the voting interest model, generally greater than 50% ownership, or for which the Company is the primary beneficiary under the variable-interest model. The Company uses the equity method of accounting when it exercises significant influence over the investee, but does not have operating control, generally between 20% and 50% ownership. Under the equity method of accounting, original investments are recorded at cost in prepaid expenses and other assets on the Consolidated Statements of Financial Condition and adjusted by the Company’s proportionate share of the investees’ undistributed earnings or losses. Equity investments are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of the investment may not be recoverable.

Earnings Per Share

Earnings Per Share

Basic earnings per share is computed by dividing the net income attributable to common stock by the weighted-average number of shares of common stock outstanding during the period. For purposes of computing diluted earnings per share, the weighted-average shares outstanding of common stock reflects the dilutive effect that could occur if convertible securities or other contracts to issue common stock were converted into or exercised for common stock.

Use of Estimates

Use of Estimates

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 at 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.

Recent Accounting Pronouncements

Recent Accounting Pronouncements

In December 2023, the Financial Accounting Standards Board (the “FASB”) issued Accounting Standards Update (“ASU”) 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures. The ASU requires disaggregated information about a reporting entity’s effective tax rate reconciliation and income taxes paid. The ASU is effective for the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2025. The guidance may be applied on a prospective or retrospective basis and early adoption is permitted. Adoption of this ASU will result in additional disclosures, but will not have an impact on the Company’s consolidated statements of financial condition, operations and cash flows.

In November 2024, the FASB issued ASU 2024-03, Disaggregation of Income Statement Expenses. The ASU primarily will require enhanced disclosures about certain types of expenses. The amendments in ASU 2024-03 are effective for fiscal years beginning after December 15, 2026 and interim periods within fiscal years beginning after December 15, 2027, and may be applied either on a prospective or retrospective basis. The Company is currently evaluating the impact of the standard on its disclosures.

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Significant Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2025

Accounting Policies [Abstract]

Summary of Commission Revenue by Fee Type

The following table presents commission revenue by fee type:

	Three Months Ended March 31,
	2025		2024
	(In thousands)
Commission revenue by fee type
Variable transaction fees
Disclosed trading	$	95,455	$	94,778
Open Trading – matched principal trading		43,052		48,180
U.S. government bonds - matched principal trading		4,529		3,712
Other		4,955		4,849
Total variable transaction fees		147,991		151,519
Distribution fees and unused minimum fees		33,352		33,354
Total commissions	$	181,343	$	184,873

Summary of Information Services Revenue by Timing of Recognition

The following table presents information services revenue by timing of recognition:

	Three Months Ended March 31,
	2025		2024
	(In thousands)
Information services revenue by timing    of recognition
Services transferred over time	$	12,699	$	11,874
Services transferred at a point in time		205		7
Total information services revenues	$	12,904	$	11,881

Summary of Post-Trade Services Revenue by Timing of Recognition

The following table presents post-trade services revenue by timing of recognition:

	Three Months Ended March 31,
	2025		2024
	(In thousands)
Post-trade services revenue by timing    of recognition
Services transferred over time	$	11,049	$	10,540
Services transferred at a point in time		39		190
Total post-trade services revenues	$	11,088	$	10,730

Summary of Technology Services Revenue by Timing of Recognition

The following table presents technology services revenue by timing of recognition:

	Three Months Ended March 31,
	2025		2024
	(In thousands)
Technology services revenue by timing    of recognition
Services transferred over time	$	3,062	$	2,830
Services transferred at a point in time		179		4
Total technology services revenues	$	3,241	$	2,834

Summary of Revenue Recognized from Contract Liabilities and Remaining Balance

The revenue recognized from contract liabilities and the remaining balance is shown below:

	December 31, 2024			Payments received in advance of services to be performed		Revenue recognized for services performed during the period			Foreign Currency Translation		March 31, 2025
		(In thousands)
Information services	$		3,302	$	3,043	$	(3,713	)	$	—	$	2,632
Post-trade services			1,286		6,877		(6,251	)		39		1,951
Technology services			415		1,933		(1,980	)		—		368
Total deferred revenue	$		5,003	$	11,853	$	(11,944	)	$	39	$	4,951

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Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2025

Fair Value Disclosures [Abstract]

Valuation of Company's Assets and Liabilities Measured at Fair Value

The following table summarizes the valuation of the Company’s assets and liabilities measured at fair value as categorized based on the hierarchy described in Note 2:

	Level 1		Level 2		Level 3		Total
	(In thousands)
As of March 31, 2025
Assets
Money market funds	$	77,532	$	—	$	—	$	77,532
Securities available-for-sale
Corporate debt		—		55,677		—		55,677
Trading securities
U.S. Treasuries		—		100,167		—		100,167
Mutual funds held in rabbi trust		—		10,269		—		10,269
Foreign currency forward position		—		2,619		—		2,619
Total assets	$	77,532	$	168,732	$	—	$	246,264
As of December 31, 2024
Assets
Money market funds	$	55,473	$	—	$	—	$	55,473
Securities available-for-sale
Corporate debt		—		55,108		—		55,108
Trading securities
U.S. Treasuries		—		99,045		—		99,045
Mutual funds held in rabbi trust		—		11,107		—		11,107
Total assets	$	55,473	$	165,260	$	—	$	220,733
Liabilities
Foreign currency forward position		—		936		—		936
Total liabilities	$	—	$	936	$	—	$	936

Carrying Value of Financial Asset and Liability Not Measured at Fair Value

The table below presents the carrying value, fair value and fair value hierarchy category of the Company’s financial assets and liabilities that are not measured at fair value on the Consolidated Statements of Financial Condition. The carrying values of the Company’s financial assets and liabilities not measured at fair value categorized in the fair value hierarchy as Level 1 and Level 2 approximate fair value due to the short-term nature of the underlying assets and liabilities.

	Carrying Value		Fair Value		Level 1		Level 2		Level 3		Total
	(In thousands)
As of March 31, 2025
Financial assets not measured at fair value:
Cash	$	408,692	$	408,692	$	408,692	$	—	$	—	$	408,692
Cash segregated under federal regulations		47,514		47,514		47,514		—		—		47,514
Accounts receivable, net of allowance		109,171		109,171		—		109,171		—		109,171
Receivables from broker-dealers, clearing    organizations and customers		493,613		493,613		110,544		383,069		—		493,613
Total	$	1,058,990	$	1,058,990	$	566,750	$	492,240	$	—	$	1,058,990
Financial liabilities not measured at fair value:
Payables to broker-dealers, clearing    organizations and customers	$	318,866	$	318,866	$	—	$	318,866	$	—	$	318,866
As of December 31, 2024
Financial assets not measured at fair value:
Cash	$	489,005	$	489,005	$	489,005	$	—	$	—	$	489,005
Cash segregated under federal regulations		47,107		47,107		47,107		—		—		47,107
Accounts receivable, net of allowance		91,845		91,845		—		91,845		—		91,845
Receivables from broker-dealers, clearing    organizations and customers		357,728		357,728		107,652		250,076		—		357,728
Total	$	985,685	$	985,685	$	643,764	$	341,921	$	—	$	985,685
Financial liabilities not measured at fair value:
Payables to broker-dealers, clearing    organizations and customers	$	218,845	$	218,845	$	—	$	218,845	$	—	$	218,845

Summary of Foreign Currency Forward Contracts

The following table summarizes the Company’s foreign currency forward position:

	As of
	March 31, 2025		December 31, 2024
	(In thousands)
Notional value	$	61,958	$	64,454
Fair value of notional		64,577		63,518
Fair value of the asset/(liability)	$	2,619	$	(936	)

Summary of Realized and Unrealized Gains and Losses on Foreign Currency Forward Contracts

The following table summarizes the realized and unrealized gains and losses on foreign currency forward contracts:

	Three Months Ended March 31,
	2025			2024
	(In thousands)
Unrealized gain/(loss)	$	3,556		$	(2,098	)
Realized gain/(loss)		(1,693	)		1,323
Total gain/(loss)	$	1,863		$	(775	)

Summary of Company's Investments

The following table summarizes the Company’s investments:

	Amortized cost			Gross unrealized gains		Gross unrealized losses			Fair value
		(In thousands)
As of March 31, 2025
Securities available-for-sale
Corporate debt	$		55,708	$	165	$	(196	)	$	55,677
Trading securities
U.S. Treasuries			100,468		131		(432	)		100,167
Mutual funds held in rabbi trust			9,867		488		(86	)		10,269
Total investments	$		166,043	$	784	$	(714	)	$	166,113
As of December 31, 2024
Securities available-for-sale
Corporate debt	$		55,447	$	88	$	(427	)	$	55,108
Trading securities
U.S. Treasuries			100,484		86		(1,525	)		99,045
Mutual funds held in rabbi trust			10,212		900		(5	)		11,107
Total investments	$		166,143	$	1,074	$	(1,957	)	$	165,260

Summary of Companies Unrealized and Realized Gains and Losses on Investments

The following table summarizes the Company’s unrealized and realized gains and losses on investments:

	Three Months Ended March 31,
	2025			2024
	(In thousands)
Unrealized gains/(losses)
Securities available-for-sale
Corporate debt	$	307		$	(73	)
Trading securities
U.S. Treasuries		1,066			(255	)
Mutual funds held in rabbi trust		(493	)		674
Total investments	$	880		$	346
Realized gains/(losses)
Securities available-for-sale
Corporate debt	$	—		$	2
Trading securities
Mutual funds held in rabbi trust		47			35
Total investments	$	47		$	37

Summary of Fair Value of Investments Based upon Contractual Maturities

The following table summarizes the fair value of the Company’s corporate debt and U.S. Treasury investments based upon the contractual maturities:

	Less than one year		Due in 1 - 5 years		Total
	(In thousands)
As of March 31, 2025
Securities available-for-sale
Corporate debt	$	8,536	$	47,141	$	55,677
Trading securities
U.S. Treasuries		50,051		50,116		100,167
Total	$	58,587	$	97,257	$	155,844
As of December 31, 2024
Securities available-for-sale
Corporate debt	$	9,346	$	45,762	$	55,108
Trading securities
U.S. Treasuries		49,978		49,067		99,045
Total	$	59,324	$	94,829	$	154,153

Summary of Fair Values and Unrealized Losses on Investments

The following table provides fair values and unrealized losses on the Company’s available-for-sale investments and the aging of securities’ continuous unrealized loss positions:

	Less than Twelve Months					Twelve Months or More					Total
	Fair value		Gross unrealized losses			Fair value		Gross unrealized losses			Fair value		Gross unrealized losses
	(In thousands)
As of March 31, 2025
Corporate debt	$	30,855	$	(196	)	$	230	$	—		$	31,085	$	(196	)
As of December 31, 2024
Corporate debt	$	38,041	$	(426	)	$	1,226	$	(1	)	$	39,267	$	(427	)

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Receivables from and Payables to Broker-dealers, Clearing Organizations and Customers (Tables)

3 Months Ended

Mar. 31, 2025

Due to and from Broker-Dealers and Clearing Organizations [Abstract]

Schedule of Receivables from and Payables to Broker-dealers, Clearing Organizations and Customers

Receivables from and payables to broker-dealers, clearing organizations and customers consisted of the following:

	As of
	March 31, 2025		December 31, 2024
Receivables from broker-dealers, clearing organizations and customers:	(In thousands)
Securities failed-to-deliver – broker-dealers and clearing organizations	$	136,018	$	109,307
Securities failed-to-deliver – customers		242,028		136,424
Cash deposits with clearing organizations and broker-dealers		110,544		107,652
Other		5,023		4,345
Total	$	493,613	$	357,728
Payables to broker-dealers, clearing organizations and customers:
Securities failed-to-receive – broker-dealers and clearing organizations	$	214,810	$	158,694
Securities failed-to-receive – customers		93,716		51,916
Other		10,340		8,235
Total	$	318,866	$	218,845

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Goodwill and Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2025

Goodwill and Intangible Assets Disclosure [Abstract]

Summary of Company's Intangible Assets

Intangible assets that are subject to amortization, including the related accumulated amortization, are comprised of the following:

	March 31, 2025							December 31, 2024
	Cost		Accumulated amortization			Net carrying amount		Cost		Accumulated amortization			Net carrying amount
	(In thousands)
Customer relationships	$	139,551	$	(68,612	)	$	70,939	$	138,089	$	(64,698	)	$	73,391
Technology and other intangibles		41,130		(17,639	)	$	23,491		41,130		(16,443	)	$	24,687
Total	$	180,681	$	(86,251	)	$	94,430	$	179,219	$	(81,141	)	$	98,078

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Stock-Based Compensation Plans (Tables)

3 Months Ended

Mar. 31, 2025

Share-Based Payment Arrangement [Abstract]

Stock-Based Compensation Expense

Total stock-based compensation expense was as follows:

	Three Months Ended March 31,
	2025		2024
	(In thousands)
Employees	$	6,822	$	6,893
Non-employee directors and consultants		874		405
Total stock-based compensation	$	7,696	$	7,298

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Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 2025

Earnings Per Share [Abstract]

Basic and Diluted Weighted Average Shares Outstanding Used to Compute Earnings Per Share

The following table sets forth basic and diluted weighted average shares outstanding used to compute earnings per share:

		Three Months Ended March 31,
		2025		2024
	(In thousands, except per share amounts)
Basic weighted average shares outstanding			37,388		37,740
Dilutive effect of stock options and full value awards			68		50
Diluted weighted average shares outstanding			37,456		37,790
Basic earnings per share		$	0.40	$	1.92
Diluted earnings per share			0.40		1.92

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Leases (Tables)

3 Months Ended

Mar. 31, 2025

Leases [Abstract]

Schedule of Components of Operating Lease Expense

The following table presents the components of operating lease expense for the three months ended March 31, 2025 and 2024:

		Three Months Ended March 31,
Lease cost:	Classification	2025		2024
		(In thousands)
Operating lease cost - office space	Occupancy	$	2,751	$	2,753
Operating lease cost - equipment	Technology and communications		98		98
Variable lease costs	Occupancy		785		587
Total operating lease cost		$	3,634	$	3,438

Summary of Weighted Average Remaining Lease Term and Discount Rate

The weighted average remaining lease term and weighted average discount rate are as follows:

	As of
Lease Term and Discount Rate	March 31, 2025			December 31, 2024
Weighted average remaining lease term (in years) - operating leases		8.6			8.8
Weighted average discount rate - operating leases		6.1	%		6.1	%
Weighted average remaining lease term (in years) - finance leases		0.5			0.8
Weighted average discount rate - finance leases		7.2	%		7.2	%

Schedule of Maturity of Lease Liabilities

The following table presents the maturity of lease liabilities as of March 31, 2025:

	Operating Leases		Finance Leases
	(In thousands)
Remainder of 2025	$	9,611		59
2026		12,233		—
2027		9,321		—
2028		8,692		—
2029		8,994		—
2030 and thereafter		42,199		—
Total lease payments		91,050		59
Less: imputed interest		20,247		1
Present value of lease liabilities	$	70,803	$	58

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Segment and Geographic Information (Tables)

3 Months Ended

Mar. 31, 2025

Segment Reporting [Abstract]

Summary of Revenue and Long-lived Assets

Revenues for the three months ended March 31, 2025 and 2024, and long-lived assets as of March 31, 2025 and December 31, 2024 were as follows:

	Three Months Ended March 31,
	2025		2024
	(In thousands)
Revenues
United States	$	142,660	$	145,275
United Kingdom		42,729		41,220
Other		23,187		23,823
Total	$	208,576	$	210,318

	As of
	March 31, 2025		December 31, 2024
	(In thousands)
Long-lived assets, as defined
United States	$	94,594	$	92,983
United Kingdom		11,736		12,683
Other		1,528		1,632
Total	$	107,858	$	107,298

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Cash and Cash Equivalents and Restricted Cash (Tables)

3 Months Ended

Mar. 31, 2025

Cash and Cash Equivalents [Abstract]

Summary of Reconciliation of Cash and Cash Equivalents with Restricted or Segregated Cash

The following table provides a reconciliation of cash and cash equivalents together with restricted or segregated cash as reported within the Consolidated Statements of Financial Condition to the sum of the same such amounts shown in the Consolidated Statements of Cash Flows:

		As of
	Statement of Financial Condition Location	March 31, 2025		December 31, 2024
		(In thousands)
Cash and cash equivalents	Cash and cash equivalents	$	486,224	$	544,478
Cash segregated for regulatory    purposes	Cash segregated under federal    regulations		47,514		47,107
Restricted cash deposits with clearing    organizations and broker-dealers	Receivables from broker-dealers,    clearing organizations    and customers		110,544		107,652
Other cash deposits	Prepaid expenses and other assets		172		1,222
Total		$	644,454	$	700,459

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Organization and Principal Business Activity - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2025 Institutional_Investor_and_BrokerDealer_Firm
Accounting Policies [Line Items]
Date of incorporation	Apr. 11, 2000
Minimum [Member]
Accounting Policies [Line Items]
Number of institutional investor and broker-dealer firms	2,100

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Significant Accounting Policies - Additional Information (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2025 USD ($) Revenue	Mar. 31, 2024 USD ($)	Dec. 31, 2024 USD ($)
Significant Accounting Policies [Line Items]
Allowance for credit losses	$ 658		$ 982
Provision for bad debts	200	$ 100
Write-offs and other charges against the allowance for credit losses	$ 300	$ 300
Number of revenue streams | Revenue	4
Maximum [Member]
Significant Accounting Policies [Line Items]
Contractual maturities accounts receivable	1 year
Estimated useful life of fixed assets	7 years
Maximum [Member] | Business Combinations [Member]
Significant Accounting Policies [Line Items]
Estimated life of intangible assets	15 years
Maximum [Member] | Internally Developed Software [Member]
Significant Accounting Policies [Line Items]
Estimated life of intangible assets	5 years
Minimum [Member]
Significant Accounting Policies [Line Items]
Estimated useful life of fixed assets	3 years
Minimum [Member] | Business Combinations [Member]
Significant Accounting Policies [Line Items]
Estimated life of intangible assets	1 year
Minimum [Member] | Internally Developed Software [Member]
Significant Accounting Policies [Line Items]
Estimated life of intangible assets	3 years

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Significant Accounting Policies - Summary of Commission Revenue by Fee Type (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Commission revenue by fee type
Revenues	$ 208,576	$ 210,318
Commissions [Member]
Commission revenue by fee type
Disclosed trading	95,455	94,778
Open Trading - matched principal trading	43,052	48,180
Other Variable Transaction	4,955	4,849
Total variable transaction fees	147,991	151,519
Distribution fees and unused minimum fees	33,352	33,354
Revenues	181,343	184,873
Commissions [Member] | US Government Bonds [Member]
Commission revenue by fee type
Open Trading - matched principal trading	$ 4,529	$ 3,712

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Significant Accounting Policies - Summary of Information Services Revenue by Timing of Recognition (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Significant Accounting Policies [Line Items]
Revenues	$ 208,576	$ 210,318
Information Services [Member]
Significant Accounting Policies [Line Items]
Revenues	12,904	11,881
Information Services [Member] | Transferred over Time [Member]
Significant Accounting Policies [Line Items]
Revenues	12,699	11,874
Information Services [Member] | Transferred at a Point in Time [Member]
Significant Accounting Policies [Line Items]
Revenues	$ 205	$ 7

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Significant Accounting Policies - Summary of Post-Trade Services Revenue by Timing of Recognition (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Significant Accounting Policies [Line Items]
Revenues	$ 208,576	$ 210,318
Post-trade Services [Member]
Significant Accounting Policies [Line Items]
Revenues	11,088	10,730
Post-trade Services [Member] | Transferred over Time [Member]
Significant Accounting Policies [Line Items]
Revenues	11,049	10,540
Post-trade Services [Member] | Transferred at a Point in Time [Member]
Significant Accounting Policies [Line Items]
Revenues	$ 39	$ 190

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Significant Accounting Policies - Summary of Technology Services Revenue by Timing of Recognition (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Significant Accounting Policies [Line Items]
Revenues	$ 208,576	$ 210,318
Technology Services [Member]
Significant Accounting Policies [Line Items]
Revenues	3,241	2,834
Technology Services [Member] | Transferred over Time [Member]
Significant Accounting Policies [Line Items]
Revenues	3,062	2,830
Technology Services [Member] | Transferred at Point in Time [Member]
Significant Accounting Policies [Line Items]
Revenues	$ 179	$ 4

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Significant Accounting Policies - Summary of Revenue Recognized from Contract Liabilities and Remaining Balance (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2025 USD ($)
Significant Accounting Policies [Line Items]
Deferred revenues, beginning balance	$ 5,003
Payments received in advance of services to be performed	11,853
Revenue recognized for services performed during the period	(11,944)
Foreign Currency Translation	39
Deferred revenues, ending balance	4,951
Information Services [Member]
Significant Accounting Policies [Line Items]
Deferred revenues, beginning balance	3,302
Payments received in advance of services to be performed	3,043
Revenue recognized for services performed during the period	(3,713)
Deferred revenues, ending balance	2,632
Post-trade Services [Member]
Significant Accounting Policies [Line Items]
Deferred revenues, beginning balance	1,286
Payments received in advance of services to be performed	6,877
Revenue recognized for services performed during the period	(6,251)
Foreign Currency Translation	39
Deferred revenues, ending balance	1,951
Technology Services [Member]
Significant Accounting Policies [Line Items]
Deferred revenues, beginning balance	415
Payments received in advance of services to be performed	1,933
Revenue recognized for services performed during the period	(1,980)
Deferred revenues, ending balance	$ 368

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Significant Accounting Policies - Additional Information (Detail 1) - Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2025-04-01 $ in Millions	Mar. 31, 2025 USD ($)
Significant Accounting Policies [Line Items]
Aggregate amount of transaction price allocated to remaining performance obligations	$ 46.0
Expected time to recognize revenue for remaining performance obligation	43 months

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Regulatory Capital Requirements - Additional Information (Detail) $ in Millions	Mar. 31, 2025 USD ($)
U.S. Subsidiaries
Brokers And Dealers [Line Items]
Aggregate net capital and financial resources in excess of required level	$ 552.1
Aggregate net capital and financial resources, minimum capital requirement	36.6
U.S. Broker-Dealer Subsidiaries
Brokers And Dealers [Line Items]
Aggregate net capital and financial resources in excess of required level	4.0
Aggregate net capital and financial resources, minimum capital requirement	285.5
Securities reserve deposit	$ 47.5

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Fair Value Measurements - Valuation of Company's Assets and Liabilities Measured at Fair Value (Detail) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Assets
Money market funds	$ 77,532	$ 55,473
Assets Fair Value Total	246,264	220,733
Liabilities
Total liabilities		936
Foreign Currency Forward Position [Member]
Assets
Foreign currency forward position	2,619
Liabilities
Foreign currency forward position		936
Mutual Funds Held In Rabbi Trust [Member]
Assets
Mutual funds held in rabbi trust	10,269	11,107
U.S. Treasuries [Member]
Assets
Trading securities	100,167	99,045
Corporate Debt [Member]
Assets
Securities available-for-sale	55,677	55,108
Level 1 [Member]
Assets
Money market funds	77,532	55,473
Assets Fair Value Total	77,532	55,473
Level 2 [Member]
Assets
Assets Fair Value Total	168,732	165,260
Liabilities
Total liabilities		936
Level 2 [Member] | Foreign Currency Forward Position [Member]
Assets
Foreign currency forward position	2,619
Liabilities
Foreign currency forward position		936
Level 2 [Member] | Mutual Funds Held In Rabbi Trust [Member]
Assets
Mutual funds held in rabbi trust	10,269	11,107
Level 2 [Member] | U.S. Treasuries [Member]
Assets
Trading securities	100,167	99,045
Level 2 [Member] | Corporate Debt [Member]
Assets
Securities available-for-sale	$ 55,677	$ 55,108

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Fair Value Measurements - Additional Information (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Purchases of investments	$ 5,500,000	$ 5,000,000
Proceeds from the sales and maturities of securities available-for-sale	5,300,000	4,300,000
Transfers between Level 1, Level 2 and Level 3 securities	0	0
Credit losses on available-for-sale securities	$ 0	$ 0

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Fair Value Measurements - Carrying Value of Financial Asset and Liability Not Measured at Fair Value (Detail) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Financial assets not measured at fair value:
Financial assets not measured at fair value	$ 246,264	$ 220,733
Level 1 [Member]
Financial assets not measured at fair value:
Financial assets not measured at fair value	77,532	55,473
Level 2 [Member]
Financial assets not measured at fair value:
Financial assets not measured at fair value	168,732	165,260
Financial Assets and Liabilities not Measured [Member]
Financial assets not measured at fair value:
Financial assets not measured at fair value	1,058,990	985,685
Financial Assets and Liabilities not Measured [Member] | Payables to Broker-Dealers, Clearing Organizations and Customers [Member]
Financial liabilities not measured at fair value:
Financial liabilities not measured at fair value	318,866	218,845
Financial Assets and Liabilities not Measured [Member] | Cash [Member]
Financial assets not measured at fair value:
Financial assets not measured at fair value	408,692	489,005
Financial Assets and Liabilities not Measured [Member] | Cash Segregated under Federal Regulations [Member]
Financial assets not measured at fair value:
Financial assets not measured at fair value	47,514	47,107
Financial Assets and Liabilities not Measured [Member] | Accounts Receivable, Net of Allowance [Member]
Financial assets not measured at fair value:
Financial assets not measured at fair value	109,171	91,845
Financial Assets and Liabilities not Measured [Member] | Receivables from Broker-Dealers, Clearing Organizations and Customers [Member]
Financial assets not measured at fair value:
Financial assets not measured at fair value	493,613	357,728
Financial Assets and Liabilities not Measured [Member] | Level 1 [Member]
Financial assets not measured at fair value:
Financial assets not measured at fair value	566,750	643,764
Financial Assets and Liabilities not Measured [Member] | Level 1 [Member] | Cash [Member]
Financial assets not measured at fair value:
Financial assets not measured at fair value	408,692	489,005
Financial Assets and Liabilities not Measured [Member] | Level 1 [Member] | Cash Segregated under Federal Regulations [Member]
Financial assets not measured at fair value:
Financial assets not measured at fair value	47,514	47,107
Financial Assets and Liabilities not Measured [Member] | Level 1 [Member] | Receivables from Broker-Dealers, Clearing Organizations and Customers [Member]
Financial assets not measured at fair value:
Financial assets not measured at fair value	110,544	107,652
Financial Assets and Liabilities not Measured [Member] | Level 2 [Member]
Financial assets not measured at fair value:
Financial assets not measured at fair value	492,240	341,921
Financial Assets and Liabilities not Measured [Member] | Level 2 [Member] | Payables to Broker-Dealers, Clearing Organizations and Customers [Member]
Financial liabilities not measured at fair value:
Financial liabilities not measured at fair value	318,866	218,845
Financial Assets and Liabilities not Measured [Member] | Level 2 [Member] | Accounts Receivable, Net of Allowance [Member]
Financial assets not measured at fair value:
Financial assets not measured at fair value	109,171	91,845
Financial Assets and Liabilities not Measured [Member] | Level 2 [Member] | Receivables from Broker-Dealers, Clearing Organizations and Customers [Member]
Financial assets not measured at fair value:
Financial assets not measured at fair value	383,069	250,076
Financial Assets and Liabilities not Measured [Member] | Carrying Value [Member]
Financial assets not measured at fair value:
Financial assets not measured at fair value	1,058,990	985,685
Financial Assets and Liabilities not Measured [Member] | Carrying Value [Member] | Payables to Broker-Dealers, Clearing Organizations and Customers [Member]
Financial liabilities not measured at fair value:
Financial liabilities not measured at fair value	318,866	218,845
Financial Assets and Liabilities not Measured [Member] | Carrying Value [Member] | Cash [Member]
Financial assets not measured at fair value:
Financial assets not measured at fair value	408,692	489,005
Financial Assets and Liabilities not Measured [Member] | Carrying Value [Member] | Cash Segregated under Federal Regulations [Member]
Financial assets not measured at fair value:
Financial assets not measured at fair value	47,514	47,107
Financial Assets and Liabilities not Measured [Member] | Carrying Value [Member] | Accounts Receivable, Net of Allowance [Member]
Financial assets not measured at fair value:
Financial assets not measured at fair value	109,171	91,845
Financial Assets and Liabilities not Measured [Member] | Carrying Value [Member] | Receivables from Broker-Dealers, Clearing Organizations and Customers [Member]
Financial assets not measured at fair value:
Financial assets not measured at fair value	493,613	357,728
Financial Assets and Liabilities not Measured [Member] | Fair Value [Member]
Financial assets not measured at fair value:
Financial assets not measured at fair value	1,058,990	985,685
Financial Assets and Liabilities not Measured [Member] | Fair Value [Member] | Payables to Broker-Dealers, Clearing Organizations and Customers [Member]
Financial liabilities not measured at fair value:
Financial liabilities not measured at fair value	318,866	218,845
Financial Assets and Liabilities not Measured [Member] | Fair Value [Member] | Cash [Member]
Financial assets not measured at fair value:
Financial assets not measured at fair value	408,692	489,005
Financial Assets and Liabilities not Measured [Member] | Fair Value [Member] | Cash Segregated under Federal Regulations [Member]
Financial assets not measured at fair value:
Financial assets not measured at fair value	47,514	47,107
Financial Assets and Liabilities not Measured [Member] | Fair Value [Member] | Accounts Receivable, Net of Allowance [Member]
Financial assets not measured at fair value:
Financial assets not measured at fair value	109,171	91,845
Financial Assets and Liabilities not Measured [Member] | Fair Value [Member] | Receivables from Broker-Dealers, Clearing Organizations and Customers [Member]
Financial assets not measured at fair value:
Financial assets not measured at fair value	$ 493,613	$ 357,728

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Fair Value Measurements - Summary of Foreign Currency Forward Contracts (Detail) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Fair Value Disclosures [Abstract]
Notional value	$ 61,958	$ 64,454
Fair value of notional	64,577	63,518
Fair value of the asset/(liability)	$ 2,619	$ (936)

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Fair Value Measurements - Summary of Realized and Unrealized Gains and Losses on Foreign Currency Forward Contracts (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Gain (Loss) on Securities [Line Items]
Unrealized gain/(loss)	$ 880	$ 346
Realized gain/(loss)	47	37
Forward Contracts [Member]
Gain (Loss) on Securities [Line Items]
Unrealized gain/(loss)	3,556	(2,098)
Realized gain/(loss)	(1,693)	1,323
Total gain/(loss)	$ 1,863	$ (775)

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Fair Value Measurements - Summary of Company's Investments (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2025	Dec. 31, 2024
Schedule Of Available For Sale Securities [Line Items]
Investments, Amortized cost	$ 166,043	$ 166,143
Investments, Gross unrealized gains	784	1,074
Investments, Gross unrealized losses	(714)	(1,957)
Investments, Fair value	166,113	165,260
Corporate Debt [Member]
Schedule Of Available For Sale Securities [Line Items]
Securities available-for-sale, Amortized Cost	55,708	55,447
Securities available-for-sale, Gross unrealized gains	165	88
Securities available-for-sale, Gross unrealized losses	(196)	(427)
Securities available-for-sale, Fair value	55,677	55,108
U.S. Treasuries [Member]
Schedule Of Available For Sale Securities [Line Items]
Trading securities, Amortized cost	100,468	100,484
Trading securities, Gross unrealized gains	131	86
Trading securities, Gross unrealized losses	(432)	(1,525)
Trading securities, Fair value	100,167	99,045
Mutual Funds Held In Rabbi Trust [Member]
Schedule Of Available For Sale Securities [Line Items]
Trading securities, Amortized cost	9,867	10,212
Trading securities, Gross unrealized gains	488	900
Trading securities, Gross unrealized losses	(86)	(5)
Trading securities, Fair value	$ 10,269	$ 11,107

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Fair Value Measurements - Summary of Companies Unrealized and Realized Gains and Losses on Investments (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Gain (Loss) on Securities [Line Items]
Unrealized gains/(losses)	$ 880	$ 346
Realized gains/(losses)	47	37
Corporate Debt [Member]
Gain (Loss) on Securities [Line Items]
Unrealized gains/(losses)	307	(73)
Realized gains/(losses)	0	2
U.S. Treasuries [Member]
Gain (Loss) on Securities [Line Items]
Unrealized gains/(losses)	1,066	(255)
Mutual Funds Held In Rabbi Trust [Member]
Gain (Loss) on Securities [Line Items]
Unrealized gains/(losses)	(493)	674
Realized gains/(losses)	$ 47	$ 35

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Fair Value Measurements - Summary of Fair Value of Investments Based upon Contractual Maturities (Detail) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Debt Securities, Available-for-Sale [Line Items]
Less than one year	$ 58,587	$ 59,324
Due in 1 - 5 years	97,257	94,829
Total	155,844	154,153
U.S. Treasuries [Member]
Debt Securities, Available-for-Sale [Line Items]
Less than one year	50,051	49,978
Due in 1 - 5 years	50,116	49,067
Total	100,167	99,045
Corporate Debt [Member]
Debt Securities, Available-for-Sale [Line Items]
Less than one year	8,536	9,346
Due in 1 - 5 years	47,141	45,762
Total	$ 55,677	$ 55,108

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Fair Value Measurements - Summary of Fair Values and Unrealized Losses on Investments (Detail) - Corporate Debt [Member] - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items]
Less than Twelve Months, Estimated Fair value	$ 30,855	$ 38,041
Less than Twelve Months, Gross unrealized losses	(196)	(426)
Twelve Months or More, Estimated Fair value	230	1,226
Twelve Months or More, Gross unrealized losses	0	(1)
Estimated Fair value, Total	31,085	39,267
Gross unrealized losses, Total	$ (196)	$ (427)

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Receivables from and Payables to Broker-dealers, Clearing Organizations and Customers - Schedule of Receivables from and Payables to Broker-dealers, Clearing Organizations and Customers (Detail) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Receivables from broker-dealers, clearing organizations and customers:
Securities failed-to-deliver - broker-dealers and clearing organizations	$ 136,018	$ 109,307
Securities failed-to-deliver - customers	242,028	136,424
Cash deposits with clearing organizations and broker-dealers	110,544	107,652
Other	5,023	4,345
Total	493,613	357,728
Payables to broker-dealers, clearing organizations and customers:
Securities failed-to-receive - broker-dealers and clearing organizations	214,810	158,694
Securities failed-to-receive - customers	93,716	51,916
Other	10,340	8,235
Total	$ 318,866	$ 218,845

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Acquisitions and Equity Investments - Additional Information (Detail) - RFQ Hub Holdings LLC [Member] - USD ($) $ in Millions		3 Months Ended
	Apr. 19, 2024	Mar. 31, 2025	Mar. 31, 2024	May 01, 2022
Business Acquisition [Line Items]
Cash consideration	$ 37.9
Recorded investments				$ 34.4
Proportionate share in net earnings		$ 0.3	$ 0.4
Receivable from the equity method investee		0.6
Reimbursable support costs for equity method investee		0.6	$ 0.5
Other Investees [Member]
Business Acquisition [Line Items]
Equity Method Investment, Ownership Percentage	90.00%
Prepaid Expenses and Other Assets [Member]
Business Acquisition [Line Items]
Recorded investments		$ 34.7

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Goodwill and Intangible Assets - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024
Goodwill [Line Items]
Amortization expense associated with identifiable intangible assets	$ 4.4	$ 5.0
Estimated total amortization expense 2025	16.9
Estimated total amortization expense 2026	15.2
Estimated total amortization expense 2027	13.8
Estimated total amortization expense 2028	12.3
Estimated total amortization expense 2029	11.3
Indefinite-lived Intangible Assets [Member]
Goodwill [Line Items]
Goodwill and intangible assets with indefinite lives	$ 236.7		$ 236.7

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Goodwill and Intangible Assets - Summary of Company's Intangible Assets (Detail) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Finite Lived Intangible Assets [Line Items]
Cost	$ 180,681	$ 179,219
Accumulated amortization	(86,251)	(81,141)
Net carrying amount	94,430	98,078
Customer Relationships [Member]
Finite Lived Intangible Assets [Line Items]
Cost	139,551	138,089
Accumulated amortization	(68,612)	(64,698)
Net carrying amount	70,939	73,391
Technology and Other Intangibles [Member]
Finite Lived Intangible Assets [Line Items]
Cost	41,130	41,130
Accumulated amortization	(17,639)	(16,443)
Net carrying amount	$ 23,491	$ 24,687

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Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Schedule Of Pre Tax Income [Line Items]
Provision for income taxes	$ 81,089	$ 24,102
Effective income tax rate	84.30%	24.90%
Provisions for unrecognized tax benefits from prior period	$ 54,900
Provisions for unrecognized tax benefits from current period	1,400
Liability for unrecognized tax benefits from current period	$ 56,400
New York State [Member]
Schedule Of Pre Tax Income [Line Items]
Income tax year under examination	2015 2016 2017 2018 2019 2020
New York City [Member]
Schedule Of Pre Tax Income [Line Items]
Income tax year under examination	2016 2017 2018

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Stock-Based Compensation Plans - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares available for grant under the stock incentive plan	2,421,057
Unrecognized compensation costs related to non-vested	$ 68.7
Weighted-average period over which cost is expected to be recognized	2 years 3 months 18 days
Common stock, shares issued	41,127,475		41,020,421
Restricted Stock [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of non-option equity instruments granted during the period	146,977
Employees Stock Purchase Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares available for grant under the stock incentive plan	102,357
Common stock, shares issued	5,698
Employees [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based payment arrangement, amount capitalized	$ 0.4	$ 0.2
Employees [Member] | Restricted Stock [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Weighted-average grant date fair value per share	$ 193.75
Employees [Member] | Performance Based Share [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of non-option equity instruments granted during the period	20,606
Number of stock option equity instruments granted during the period	35,549
Weighted-average fair value each option granted	$ 67.2
Weighted-average grant date fair value per share	$ 193.49

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Stock-Based Compensation Plans - Stock-Based Compensation Expense (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total stock-based compensation	$ 7,696	$ 7,298
Employees [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total stock-based compensation	6,822	6,893
Non-Employee Directors and Consultants [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total stock-based compensation	$ 874	$ 405

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Earnings Per Share - Basic and Diluted Weighted Average Shares Outstanding Used to Compute Earnings Per Share (Detail) - $ / shares shares in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Earnings Per Share [Abstract]
Basic weighted average shares outstanding	37,388	37,740
Dilutive effect of stock options and full value awards	68	50
Diluted weighted average shares outstanding	37,456	37,790
Basic earnings per share	$ 0.4	$ 1.92
Diluted earnings per share	$ 0.4	$ 1.92

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Earnings Per Share - Additional Information (Detail) - shares	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Stock Options and Full Value Awards [Member]
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Stock options and full value awards excluded from the computation of diluted earnings per share	312,466	571,145

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Credit Agreements and Short-term Financing - Additional Information (Detail) - USD ($)		3 Months Ended
	Aug. 09, 2023	Mar. 31, 2025	Mar. 31, 2024
Line Of Credit Facility [Line Items]
Interest expense on short-term debt		$ 200,000	$ 300,000
Outstanding overdrafts payable		0
Collateralized Agreements [Member]
Line Of Credit Facility [Line Items]
Interest expense on borrowings		0	0
Maximum available borrowings to subsidiary under agreement		$ 500,000,000
Interest rate, stated percentage		1.00%
Outstanding borrowings under agreement		$ 0
Unused borrowing capacity, amount under agreement		$ 500,000,000
Collateralized Borrowing Agreement [Member]
Line Of Credit Facility [Line Items]
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration]		us-gaap:BaseRateMember
2021 Credit Agreement [Member]
Line Of Credit Facility [Line Items]
Interest expense on borrowings		$ 0	$ 0
Credit Agreement [Member]
Line Of Credit Facility [Line Items]
Period of credit agreement	3 years
Sub-limit for swingline loans	$ 380,000,000
Line of Credit Facility, Description		On August 9, 2023, the Company entered into a three-year revolving credit facility (the “Credit Agreement”) provided by a syndicate of lenders and JPMorgan Chase Bank, N.A., as administrative agent
Revolving Credit Facility [Member] | Credit Agreement [Member]
Line Of Credit Facility [Line Items]
Revolving loans and letters of credit	$ 750,000,000
Expiration period of credit agreement	Aug. 09, 2026
Period of credit agreement		364 days
Letter of credit outstanding		$ 100,000
Amount available under credit agreement		749,900,000
Additional borrowings under credit agreement		$ 375,000,000
Standby Letters of Credit [Member] | Credit Agreement [Member]
Line Of Credit Facility [Line Items]
Sub-limit for letter of credit	$ 5,000,000

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Leases - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Lessee Lease Description [Line Items]
Operating lease, option to extend	Certain leases contain options to extend the initial term at the Company’s discretion
Operating lease, existence of option to extend [true false]	true
Finance lease expense	$ 0.1	$ 0.1
Minimum [Member]
Lessee Lease Description [Line Items]
Term of lease contract	1 year
Operating and finance leases for equipment	1 year
Maximum [Member]
Lessee Lease Description [Line Items]
Term of lease contract	15 years
Operating and finance leases for equipment	5 years

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Leases - Schedule of Components of Operating Lease Expense (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Lease Cost [Line Items]
Total operating lease cost	$ 3,634	$ 3,438
Occupancy [Member]
Lease Cost [Line Items]
Operating lease cost - office space	2,751	2,753
Variable lease costs	785	587
Technology and Communications [Member]
Lease Cost [Line Items]
Operating lease cost - equipment	$ 98	$ 98

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Leases - Summary of Weighted Average Remaining Lease Term and Discount Rate (Details)	Mar. 31, 2025	Dec. 31, 2024
Leases [Abstract]
Weighted average remaining lease term (in years) - operating leases	8 years 7 months 6 days	8 years 9 months 18 days
Weighted average discount rate - operating leases	6.10%	6.10%
Weighted average remaining lease term (in years) - finance leases	6 months	9 months 18 days
Weighted average discount rate - finance leases	7.20%	7.20%

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Leases - Schedule of Maturity of Lease Liabilities (Detail) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Leases [Abstract]
Remainder of 2025	$ 9,611
2026	12,233
2027	9,321
2028	8,692
2029	8,994
2030 and thereafter	42,199
Total lease payments	91,050
Less: imputed interest	20,247
Present value of lease liabilities	70,803	$ 72,654
Remainder of 2025	59
2026	0
2027	0
2028	0
2029	0
2030 and thereafter	0
Total lease payments	59
Less: imputed interest	1
Present value of lease liabilities	$ 58
Finance Lease, Liability, Statement of Financial Position [Extensible Enumeration]	Liabilities

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Commitments and Contingencies - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2025
Commitments and Contingencies Disclosure [Abstract]
Settlement days of bond transaction	within one to two trading days

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Share Repurchase Programs - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Aug. 31, 2024	Jan. 31, 2022
2022 Repurchase Program [Member]
Equity Class Of Treasury Stock [Line Items]
Shares repurchase program authorized, value			$ 150.0
2024 Repurchase Program [Member]
Equity Class Of Treasury Stock [Line Items]
Share Repurchase program, remaining capacity	$ 187.0
2024 Repurchase Program and 2022 Repurchase Program [Member]
Equity Class Of Treasury Stock [Line Items]
Shares repurchase program authorized additional, value		$ 200.0
Shares repurchase program, value	$ 38.1
Shares repurchase program, shares	187,905

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Segment and Geographic Information - Additional Information (Detail) - Segment	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Revenues From External Customers And Long Lived Assets [Line Items]
Number of reportable segments	1
Segment Reporting, CODM, Profit (Loss) Measure, How Used, Description	The Company’s CODM is its Chief Executive Officer. The CODM uses net income to evaluate income generated from segment assets in deciding whether to reinvest profits into the Company’s end-to-end trading solutions or into other areas, such as for acquisitions or to pay dividends. Net income is used to monitor budget versus actual results. The significant segment expenses and net income reviewed by the CODM conform to the presentation of such items in the consolidated statements of operations.
Segment Reporting, CODM, Individual Title and Position or Group Name [Extensible Enumeration]	Chief Executive Officer [Member]
Geographic Concentration Risk [Member] | Total Revenue and Long-lived Assets [Member] | United Kingdom [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Concentration Risk, Percentage	10.00%	10.00%

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Segment and Geographic Information - Summary of Revenue and Long-lived Assets (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024
Segment Reporting Information [Line Items]
Revenues	$ 208,576	$ 210,318
Long-lived assets	107,858		$ 107,298
United States [Member]
Segment Reporting Information [Line Items]
Revenues	142,660	145,275
Long-lived assets	94,594		92,983
United Kingdom [Member]
Segment Reporting Information [Line Items]
Revenues	42,729	41,220
Long-lived assets	11,736		12,683
Other [Member]
Segment Reporting Information [Line Items]
Revenues	23,187	$ 23,823
Long-lived assets	$ 1,528		$ 1,632

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Cash and Cash Equivalents and Restricted Cash - Summary of Reconciliation of Cash and Cash Equivalents with Restricted or Segregated Cash (Detail) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Cash And Cash Equivalents [Line Items]
Cash and cash equivalents	$ 486,224	$ 544,478
Cash segregated for regulatory purposes	47,514	47,107
Total	644,454	700,459
Cash and Cash Equivalents [Member]
Cash And Cash Equivalents [Line Items]
Cash and cash equivalents	486,224	544,478
Cash Segregated under Federal Regulations [Member]
Cash And Cash Equivalents [Line Items]
Cash segregated for regulatory purposes	47,514	47,107
Receivables from Broker-Dealers, Clearing Organizations and Customers [Member]
Cash And Cash Equivalents [Line Items]
Restricted cash deposits with clearing organizations and broker-dealers	110,544	107,652
Prepaid Expenses and Other Assets [Member]
Cash And Cash Equivalents [Line Items]
Other cash deposits	$ 172	$ 1,222