Marketaxess Holdings Inc (MKTX) Institutional Ownership

Institutions by Trading Activity

Ownership Statistics

37,961,692Shares Outstanding

444,170Shares held by institutions

$78,951,218Value of institutional holdings

96.24%Institutional ownership %

3.77%Shares Changed QoQ

173No. of institutional investors

Shares Owned by Institutions

Shares Purchased/Sold by Institutions

Ownership Summary

Marketaxess Holdings Inc (NASDAQ:MKTX) currently has 451 active institutional owners and shareholders as of today (December 2025), that have filed 13F forms with the Securities Exchange Commission (SEC).

Institutional ownership in Marketaxess Holdings edged down to 97.1% in December 2025, compared to 110.5% in September 2025.
Institutional share ownership changed by -2.69% QoQ, while the number of institutional owners saw a decrease of 11.22% YoY.
The latest 13F cycle for Marketaxess Holdings reveals that of 451 total investors, 246 funds grew their exposure, whereas 163 reduced theirs and 42 made no changes.
This class of investors decreased its holdings in Marketaxess Holdings to 35.99Mn shares for the 13F-cycle ending December 2025, down by 995.56K shares quarter on quarter, and down 1.46Mn shares year over year.
As of December 31, 2025, VANGUARD GROUP INC held Marketaxess Holdings's largest shareholding position with over 3.84Mn shares, representing 10.36% of total outstanding shares.
Among the most significant buyers of Marketaxess Holdings during December 2025 were BlackRock, Inc. (1.90Mn), AQR CAPITAL MANAGEMENT LLC (1.61Mn), PRIMECAP MANAGEMENT CO/CA/ (944.83K), BANK OF MONTREAL /CAN/ (932.69K), North Reef Capital Management LP (697.97K).
Leading sellers of Marketaxess Holdings stock in December 2025 included Lombard Odier Asset Management (Europe) Ltd (4.59Mn), T. Rowe Price Investment Management, Inc. (1.27Mn), MILLENNIUM MANAGEMENT LLC (976.69K), VAN ECK ASSOCIATES CORP (733.67K), GUARDCAP ASSET MANAGEMENT Ltd (207.69K).
The top 10 institutional holders of Marketaxess Holdings for the quarter ending December 2025 included VANGUARD GROUP INC (3.84Mn), BlackRock, Inc. (3.75Mn), PRIMECAP MANAGEMENT CO/CA/ (3.18Mn), AQR CAPITAL MANAGEMENT LLC (2.56Mn), FMR LLC (2.00Mn), North Reef Capital Management LP (1.61Mn), STATE STREET CORP (1.25Mn), VAN ECK ASSOCIATES CORP (1.21Mn), GUARDCAP ASSET MANAGEMENT Ltd (1.15Mn), BANK OF MONTREAL /CAN/ (951.02K).

451 Institutional Holders

444,170 Total Shares Held

Rows:

Download Data

Owner Name	Date	Shares Held	Change (QoQ)	Change (%)	Value (USD)
VANGUARD GROUP INC	31 Dec, 2025	3,839,889	-14,423	-0.37%	$695,979,882.00
BlackRock, Inc.	31 Dec, 2025	3,746,472	1,896,063	102.47%	$679,048,052.00
PRIMECAP MANAGEMENT CO/CA/	31 Dec, 2025	3,175,425	944,830	42.36%	$575,545,786.00
AQR CAPITAL MANAGEMENT LLC	31 Dec, 2025	2,558,097	1,607,009	168.97%	$463,655,158.00
FMR LLC	31 Dec, 2025	2,004,625	-139,296	-6.50%	$363,338,135.00
North Reef Capital Management LP	31 Dec, 2025	1,609,330	697,972	76.59%	$291,691,062.00
STATE STREET CORP	31 Dec, 2025	1,248,314	-72,343	-5.48%	$226,256,913.00
VAN ECK ASSOCIATES CORP	31 Dec, 2025	1,214,967	-733,666	-37.65%	$220,212.00
GUARDCAP ASSET MANAGEMENT Ltd	31 Dec, 2025	1,153,578	-207,686	-15.26%	$208,976,430.00
BANK OF MONTREAL /CAN/	31 Dec, 2025	951,024	932,687	5,086.37%	$172,373,029.00
GEODE CAPITAL MANAGEMENT, LLC	31 Dec, 2025	833,067	2,071	0.25%	$151,018,471.00
CITADEL ADVISORS LLC	31 Dec, 2025	625,208	315,122	101.62%	$113,318,950.00
Neuberger Berman Group LLC	31 Dec, 2025	549,639	547,573	26,504.02%	$99,622,069.00
JPMORGAN CHASE & CO	31 Dec, 2025	545,364	97,439	21.75%	$98,847,267.00
Findlay Park Partners LLP	31 Dec, 2025	536,400	-108,300	-16.80%	$97,222,500.00
TWO SIGMA INVESTMENTS, LP	31 Dec, 2025	533,527	169,143	46.42%	$96,701,769.00
DIMENSIONAL FUND ADVISORS LP	31 Dec, 2025	526,981	5,852	1.12%	$95,517,982.00
NORGES BANK	31 Dec, 2025	503,855	503,855	0.00%	$91,323,719.00
MORGAN STANLEY	31 Dec, 2025	424,877	-124,146	-22.61%	$77,009,309.00
BNP PARIBAS FINANCIAL MARKETS	31 Dec, 2025	375,735	-110,371	-22.71%	$68,101,969.00

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