SECURITIESFORM AND EXCHANGE COMMISSION8-K

☐Item Soliciting2.02 materialResults pursuantof toOperations Ruleand 14a-12Financial under the Exchange Act (17 CFR 240Condition.14a-12)

SecuritiesItem registered8.01 pursuantOther to Section 12(b) of the Act:Events.

IndicateItem by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§2309.40501 ofFinancial thisStatements chapter)and or Rule 12b-2 of the Securities Exchange Act of 1934 (§240Exhibits.12b-2 of this chapter).

UNITED ~~STATES~~STATESSECURITIES AND EXCHANGE COMMISSIONWASHINGTON, D.C. 20549

~~Washington,~~CURRENT ~~D.C. 20549~~REPORT

~~FORM~~Pursuant ~~8-K~~to Section 13 or 15(d) of the Securities Exchange Act of 1934

~~Current~~Date of Report (Date of earliest event reported): November 07, 2025

~~Pursuant~~MARKETAXESS toHOLDINGS ~~Section 13 or 15(d)~~INC.

(Exact name of ~~the~~Registrant ~~Securities~~as ~~Exchange~~Specified ~~Act~~in ofIts ~~1934~~Charter)

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


Delaware	001-34091	52-2230784
(State or Other Jurisdiction of Incorporation)	(Commission File Number)	(IRS Employer Identification No.)

55 Hudson Yards 15th Floor
New York, New York		10001
(Address of Principal Executive Offices)		(Zip Code)

Registrant’s ~~MarketAxess~~Telephone ~~Holdings~~Number, ~~Inc.~~Including Area Code: (212) 813-6000

(~~Exact~~Former Name ofor ~~Registrant~~Former asAddress, ~~Specified~~if inChanged ~~its~~Since ~~Charter~~Last Report)

Delaware		001-34091		52-2230784
(State or other jurisdiction of incorporation)		(Commission File Number)		(IRS Employer Identification No.)

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:

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

~~New~~☐Soliciting ~~York,~~material ~~New~~pursuant ~~York~~to ~~10001~~Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐Pre-commencement communications pursuant to Rule 14d-2(~~Address~~b) ofunder ~~principal~~the ~~executive~~Exchange ~~offices,~~Act ~~including~~(17 ~~zip~~CFR ~~code~~240.14d-2(b))

☐Pre-commencement communications pursuant to Rule 13e-4(~~212~~c) ~~813~~under the Exchange Act (17 CFR 240.13e-~~6000~~4(c))

~~(Registrant’s~~Securities ~~telephone~~registered ~~number,~~pursuant ~~including~~to ~~area~~Section ~~code~~12(b) of the Act:

Not applicable


Title of each class	Trading Symbol(s)	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 is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (~~Former~~§ 230.405 ~~name~~of this chapter) or ~~former~~Rule ~~address,~~12b-2 ifof ~~changed~~the ~~since~~Securities ~~last~~Exchange ~~report~~Act of 1934 (§ 240.12b-2 of this chapter).

~~Check~~Emerging ~~the~~growth ~~appropriate~~company ~~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:~~☐

☐If ~~Written~~an ~~communications~~emerging ~~pursuant~~growth tocompany, ~~Rule~~indicate ~~425~~by ~~under~~check mark if the ~~Securities~~registrant ~~Act~~has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(17a) ~~CFR~~of ~~230~~the Exchange Act.~~425)~~ ☐

☐On ~~Pre-commencement~~November ~~communications~~7, ~~pursuant~~2025, toMarketAxess ~~Rule~~Holdings ~~14d-2~~Inc. (bthe “Company”) ~~under~~issued a press release announcing the ~~Exchange~~Company’s ~~Act~~financial ~~(17~~results ~~CFR~~for ~~240~~its third quarter ended September 30, 2025.~~14d-2(b))~~ A copy of this press release is attached hereto as Exhibit 99.1 and is incorporated herein by reference.

☐The ~~Pre-commencement~~information ~~communications~~included ~~pursuant~~in tothis ~~Rule~~Current ~~13e~~Report on Form 8-4K (cincluding Exhibit 99.1 hereto) ~~under~~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(17a)(2) ~~CFR~~of ~~240~~the Securities Act of 1933, as amended.~~13e~~ In addition, the information included in this Current Report on Form 8-4K (cincluding 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.

Title of each class		TradingSymbol(s)		Name of each exchange on which registered
Common Stock, par value $0.003 per share		MKTX		NASDAQ Global Select Market

On November 7, 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 December 3, 2025 to stockholders of record as of the close of business on November 19, 2025.

MARKETAXESS HOLDINGS INC.

Date: August 6, 2025

/s/ Ilene Fiszel Bieler

Ilene Fiszel Bieler

Chief Financial Officer

~~Emerging~~(d) ~~growth company ☐~~Exhibits:

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. ☐


	99.1			Press Release issued by MarketAxess Holdings Inc. on November 7, 2025.

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

~~Item 2.02 Results of Operations and Financial Condition~~SIGNATURES

OnPursuant ~~August 6,~~to ~~2025, MarketAxess Holdings Inc. (~~the ~~“Company”)~~requirements ~~issued~~of ~~a press release announcing~~ the ~~Company’s~~Securities ~~financial~~Exchange ~~results~~Act ~~for~~of ~~its second quarter ended June 30~~1934, ~~2025.~~the Aregistrant ~~copy~~has ofduly caused this ~~press~~report ~~release~~to isbe ~~attached~~signed ~~hereto~~on asits ~~Exhibit~~behalf ~~99.1~~by ~~and~~the isundersigned ~~incorporated~~hereunto ~~herein~~duly ~~by reference~~authorized.

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.


			MARKETAXESS HOLDINGS INC.

Date:	November 7, 2025	By:	/s/ Ilene Fiszel Bieler
			Name: Ilene Fiszel Bieler Title: Chief Financial Officer

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.

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