Marketaxess Holdings MKTX Institutional Ownership

NASDAQ MKTX

$163.92 -0.04 (-0.02%)

At close: Sep 30, 2026 · 4:00 PM EDT

Institutions by Trading Activity

395 Institutions

Increased 189 47.8%

Unchanged 42 10.6%

Reduced 164 41.5%

Ownership Statistics

13F · as of 30 Jun, 2026

Institutional Ownership

111.78%

▲+3.72 pp QoQ

Shares Held by Institutions

39.35Mn

of 35.20Mn outstanding

▲+7.51% QoQ

Shares Outstanding

35.20Mn

-4.15Mn held outside 13F filers

Institutional Investors

395

filed 13F for Jun 2026

▼-52 vs prior quarter

Net Shares Added (QoQ)

+2.75Mn

accumulated since last quarter

Value of Holdings

$6.45Bn

reported market value

Shares Owned by Institutions

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Institutions

Accumulated Distributed

Latest quarter —

Net over range —

Accumulating quarters —

Ownership Summary

Quarter ending 30 Jun, 2026

Marketaxess Holdings Inc (NASDAQ:MKTX) has 395 institutional investors that have filed 13F reports for the period ending June 2026.

Collectively, these holders controlled 111.8% of Marketaxess Holdings's outstanding shares in June 2026, up from 108.1% in March 2026.
They increased total shares held in Marketaxess Holdings by 7.51% from last quarter, and the number of investors in MKTX decreased 25.05% annually.
Of these 395 holders, 189 added to their stakes in Marketaxess Holdings, 164 trimmed positions, and 42 made no changes.
Altogether, these fund groups held 39.35Mn shares in MKTX by June 2026, up by 2.75Mn shares quarter on quarter, and up 3.28Mn shares year over year.
BlackRock, Inc. leads ownership in MKTX with 4.0Mn shares as of June 30, 2026, equal to 11.36% of outstanding shares.
Top purchasers of MKTX stock for the quarter ending June 2026 included North Reef Capital Management LP (1.52Mn), NORGES BANK (572.42K), Goldman Sachs Group Inc (522.27K), Azora Capital LP (513.08K), CITADEL ADVISORS LLC (399.53K).
Leading sellers of Marketaxess Holdings shares for the quarter ending June 2026 were MILLENNIUM MANAGEMENT LLC (977.6K), AQR CAPITAL MANAGEMENT LLC (696.46K), VAN ECK ASSOCIATES CORP (314.67K), BNP PARIBAS FINANCIAL MARKETS (284.01K), Point72 Asset Management, L.P. (244.72K).
Per Business Quant data, the top 10 holders of Marketaxess Holdings for the quarter ending June 2026 are BlackRock, Inc. (4.0Mn), PRIMECAP MANAGEMENT CO/CA/ (3.5Mn), North Reef Capital Management LP (3.4Mn), VANGUARD PORTFOLIO MANAGEMENT LLC (2.1Mn), AQR CAPITAL MANAGEMENT LLC (1.99Mn), VANGUARD CAPITAL MANAGEMENT LLC (1.55Mn), FMR LLC (1.4Mn), State Street Corp (1.28Mn), Neuberger Berman Group LLC (1.23Mn), Goldman Sachs Group Inc (1.03Mn).

Form 13F Holdings

394 Institutional Holders

Report period 30 Jun, 2026

Total shares held 39.35Mn

Of outstanding 111.78%

#	Institution	CIK	Shares Held	% of Outstanding	Change (QoQ)	Change (%)	Value (USD)
1	BlackRock, Inc.	0002012383	3,999,836	11.36%	▼75,318	-1.85%	$453.94Mn
2	PRIMECAP MANAGEMENT CO/CA/	0000763212	3,504,905	9.96%	▲157,780	+4.71%	$397.77Mn
3	North Reef Capital Management LP	0001867831	3,395,000	9.64%	▲1,520,000	+81.07%	$385.30Mn
4	VANGUARD PORTFOLIO MANAGEMENT LLC	0002100121	2,100,273	5.97%	▼63,398	-2.93%	$238.36Mn
5	AQR CAPITAL MANAGEMENT LLC	0001167557	1,987,288	5.65%	▼696,457	-25.95%	$222.76Mn
6	VANGUARD CAPITAL MANAGEMENT LLC	0002100119	1,546,670	4.39%	▼62,589	-3.89%	$175.53Mn
7	FMR LLC	0000315066	1,404,998	3.99%	▼114,423	-7.53%	$159.45Mn
8	State Street Corp	0000093751	1,281,769	3.64%	▲912	+0.07%	$145.43Mn
9	Neuberger Berman Group LLC	0001465109	1,229,929	3.49%	▲263,900	+27.32%	$139.58Mn
10	Goldman Sachs Group Inc	0000886982	1,031,309	2.93%	▲522,266	+102.60%	$117.04Mn
11	Bank Of Montreal /Can/	0000927971	1,017,024	2.89%	▼3,535	-0.35%	$115.42Mn
12	GEODE CAPITAL MANAGEMENT, LLC	0001214717	994,772	2.83%	▲131,785	+15.27%	$112.92Mn
13	VAN ECK ASSOCIATES CORP	0000869178	924,617	2.63%	▼314,668	-25.39%	$104.93Mn
14	DIMENSIONAL FUND ADVISORS LP	0000354204	597,894	1.70%	▲16,410	+2.82%	$67.85Mn
15	NORGES BANK	0001374170	572,422	1.63%	▲572,422	0.00%	$64.96Mn
16	TWO SIGMA INVESTMENTS, LP	0001179392	543,890	1.55%	▲19,866	+3.79%	$61.73Mn
17	GUARDCAP ASSET MANAGEMENT Ltd	0001732008	536,324	1.52%	▼107,046	-16.64%	$62.16Mn
18	Azora Capital LP	0001700272	513,081	1.46%	▲513,081	0.00%	$58.23Mn
19	Davis Asset Management, L.P.	0001945894	500,000	1.42%	▲391,154	+359.36%	$56.75Mn
20	CITADEL ADVISORS LLC	0001423053	481,689	1.37%	▲399,530	+486.29%	$54.67Mn

Showing 1 to 20 of 394 holders