Marketaxess Holdings Inc (MKTX) Institutional Ownership

Institutions by Trading Activity

37,109,000Shares Outstanding

36,595,278Shares held by institutions

$6,014,616,916Value of institutional holdings

98.62%Institutional ownership %

-7.57%Shares Changed QoQ

468No. of institutional investors

Marketaxess Holdings Inc (NASDAQ:MKTX) showed up in the 13F filings of 467 institutional investors as of December 2025.

These investors held 98.1% of outstanding shares in December 2025, down from 111.1% in September 2025.
They decreased total shares held in MKTX by -7.61% quarter over quarter, and investors in Marketaxess Holdings decreased 8.25% from a year ago.
Of these 467 funds, 256 grew their exposure to Marketaxess Holdings, 169 cut back, and 42 maintained positions.
Altogether, these fund groups held 36.42Mn shares in MKTX by December 2025, down by 3.0Mn shares quarter on quarter, and down 2.44Mn shares year over year.
As of December 31, 2025, Bangor Savings Bank held the largest stake in Marketaxess Holdings with 32 shares, accounting for 0.0% of total shares outstanding.
Leading sellers of Marketaxess Holdings shares for the quarter ending December 2025 were Bangor Savings Bank (107).
Business Quant data shows the 2 biggest positions in Marketaxess Holdings as of December 2025 are held by Bangor Savings Bank (32), Investors Research Corp (22).

36,595,278 Total Shares Held

Rows:

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	-350,486	-39.12%	$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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