UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

Current Report

Pursuant to Section 13 or 15(d)

of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): August 6, 2025

MarketAxess Holdings Inc.

(Exact Name of Registrant as Specified in its Charter)

Delaware

001-34091

52-2230784

(State or other jurisdiction

of incorporation)

(Commission

File Number)

(IRS Employer

Identification No.)

55 Hudson Yards

New York, New York 10001

(Address of principal executive offices, including zip code)

(212) 813-6000

(Registrant’s telephone number, including area code)

Not applicable

(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐	Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐	Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐	Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐	Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

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

Title of each class

Trading
Symbol(s)

Name of each exchange

on which registered

Common Stock, par value $0.003 per share

MKTX

NASDAQ Global Select Market

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

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. ☐

Item 2.02

Results of Operations and Financial Condition

On August 6, 2025, MarketAxess Holdings Inc. (the “Company”) issued a press release announcing the Company’s financial results for its second quarter ended June 30, 2025. A copy of this press release is attached hereto as Exhibit 99.1 and is incorporated herein by reference.

The information included in this Current Report on Form 8-K (including Exhibit 99.1 hereto) that is furnished pursuant to this Item 2.02 shall not be deemed to be “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that Section or Sections 11 and 12(a)(2) of the Securities Act of 1933, as amended. In addition, the information included in this Current Report on Form 8-K (including Exhibit 99.1 hereto) that is furnished pursuant to this Item 2.02 shall not be incorporated by reference into any filing of the Registrant, whether made before or after the date hereof, regardless of any general incorporation language in such filing, unless expressly incorporated by specific reference into such filing.

Item 8.01

Other Events

On August 6, 2025, the Company also announced that its Board of Directors has declared a regular quarterly dividend to be paid to the holders of the outstanding shares of capital stock. A cash dividend of $0.76 per share of common stock outstanding will be paid on September 3, 2025 to stockholders of record as of the close of business on August 20, 2025.

Item 9.01

Financial Statements and Exhibits

(d) Exhibits:


99.1		Press Release issued by MarketAxess Holdings Inc. on August 6, 2025.

104		Cover Page Interactive File (the cover page tags are embedded within the Inline XBRL document).

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 hereunto duly authorized.

MARKETAXESS HOLDINGS INC.

Date: August 6, 2025

/s/ Ilene Fiszel Bieler

Ilene Fiszel Bieler

Chief Financial Officer

MARKETAXESS HOLDINGS INC 8-K