MKTX MarketAxess Holdings Inc.
MarketAxess Holdings Inc. (MKTX) Institutional Ownership
What the institutions did with MKTX last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended June 30, 2026.
Every manager below opens. Subscribers can see any firm's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.
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Each block is one manager, sized by shares held and colored by how much they moved the position last quarter. Green added, red cut, grey stood pat.
Largest holders
| Manager | Shares | % of reported |
|---|---|---|
| BlackRock, Inc. | 4.0M | 10.2% |
| PRIMECAP MANAGEMENT CO/CA/ | 3.5M | 9.0% |
| North Reef Capital Management LP | 3.4M | 8.7% |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 2.1M | 5.4% |
| AQR CAPITAL MANAGEMENT LLC | 2.0M | 5.1% |
| VANGUARD CAPITAL MANAGEMENT LLC | 1.5M | 3.9% |
| FMR LLC | 1.4M | 3.6% |
| STATE STREET CORP | 1.3M | 3.3% |
| NEUBERGER BERMAN GROUP LLC | 1.2M | 3.1% |
| GOLDMAN SACHS GROUP INC | 1.0M | 2.6% |
| BANK OF MONTREAL /CAN/ | 1.0M | 2.6% |
| GEODE CAPITAL MANAGEMENT, LLC | 994.8K | 2.5% |
| VAN ECK ASSOCIATES CORP | 924.6K | 2.4% |
| DIMENSIONAL FUND ADVISORS LP | 597.9K | 1.5% |
| NORGES BANK | 572.4K | 1.5% |
| TWO SIGMA INVESTMENTS, LP | 543.9K | 1.4% |
| GUARDCAP ASSET MANAGEMENT Ltd | 536.3K | 1.4% |
| Azora Capital LP | 513.1K | 1.3% |
| Davis Asset Management, L.P. | 500.0K | 1.3% |
| CITADEL ADVISORS LLC | 481.7K | 1.2% |
| JPMORGAN CHASE & CO | 438.0K | 1.1% |
| MORGAN STANLEY | 422.9K | 1.1% |
| LOS ANGELES CAPITAL MANAGEMENT LLC | 392.1K | 1.0% |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 330.8K | 0.8% |
| BANK OF AMERICA CORP /DE/ | 303.5K | 0.8% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| North Reef Capital Management LP | Increased | 1.9M | 3.4M | +1.5M |
| MILLENNIUM MANAGEMENT LLC | Reduced | 1.1M | 109.6K | -977.6K |
| AQR CAPITAL MANAGEMENT LLC | Reduced | 2.7M | 2.0M | -696.5K |
| GOLDMAN SACHS GROUP INC | Increased | 509.0K | 1.0M | +522.3K |
| Azora Capital LP | New | 0 | 513.1K | +513.1K |
| Findlay Park Partners LLP | Sold Out | 480.6K | 0 | -480.6K |
| CITADEL ADVISORS LLC | Increased | 82.2K | 481.7K | +399.5K |
| Davis Asset Management, L.P. | Increased | 108.8K | 500.0K | +391.2K |
| LOS ANGELES CAPITAL MANAGEMENT LLC | Increased | 9.6K | 392.1K | +382.5K |
| VAN ECK ASSOCIATES CORP | Reduced | 1.2M | 924.6K | -314.7K |
| BNP PARIBAS FINANCIAL MARKETS | Reduced | 319.3K | 35.3K | -284.0K |
| NEUBERGER BERMAN GROUP LLC | Increased | 966.0K | 1.2M | +263.9K |
| Point72 Asset Management, L.P. | Reduced | 252.8K | 8.1K | -244.7K |
| Driehaus Capital Management LLC | Sold Out | 239.3K | 0 | -239.3K |
| Walleye Capital LLC | Reduced | 332.7K | 94.0K | -238.7K |
| Amundi | Reduced | 258.7K | 29.4K | -229.3K |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | Reduced | 295.5K | 122.0K | -173.5K |
| Freestone Grove Partners LP | New | 0 | 172.8K | +172.8K |
| PRIMECAP MANAGEMENT CO/CA/ | Increased | 3.3M | 3.5M | +157.8K |
| IEQ CAPITAL, LLC | Reduced | 173.9K | 16.1K | -157.7K |
| TUDOR INVESTMENT CORP ET AL | New | 0 | 137.8K | +137.8K |
| GEODE CAPITAL MANAGEMENT, LLC | Increased | 863.0K | 994.8K | +131.8K |
| M&G PLC | New | 0 | 121.3K | +121.3K |
| FMR LLC | Reduced | 1.5M | 1.4M | -114.4K |
| CIBC Bancorp USA Inc. | Increased | 3.3K | 115.0K | +111.7K |
| GUARDCAP ASSET MANAGEMENT Ltd | Reduced | 643.4K | 536.3K | -107.0K |
| Polar Asset Management Partners Inc. | Sold Out | 104.2K | 0 | -104.2K |
| First Eagle Investment Management, LLC | Increased | 22 | 99.2K | +99.1K |
| ALGERT GLOBAL LLC | Increased | 19.4K | 112.4K | +93.0K |
| BANK OF NOVA SCOTIA | Increased | 24.6K | 115.4K | +90.8K |
| Invenomic Capital Management LP | New | 0 | 90.4K | +90.4K |
| Goodman Financial Corp | Sold Out | 83.2K | 0 | -83.2K |
| BlackRock, Inc. | Reduced | 4.1M | 4.0M | -75.3K |
| CIBC WORLD MARKET INC. | Increased | 4.0K | 78.3K | +74.3K |
| Assenagon Asset Management S.A. | Reduced | 104.8K | 30.7K | -74.1K |
| Champlain Investment Partners, LLC | Reduced | 210.1K | 136.1K | -74.0K |
| HRT FINANCIAL LP | Increased | 137.0K | 205.9K | +68.9K |
| MORGAN STANLEY | Reduced | 490.5K | 422.9K | -67.7K |
| Jump Financial, LLC | Increased | 12.6K | 78.6K | +66.0K |
| JANE STREET GROUP, LLC | Increased | 12.7K | 77.4K | +64.6K |
| VANGUARD PORTFOLIO MANAGEMENT LLC | Reduced | 2.2M | 2.1M | -63.4K |
| VANGUARD CAPITAL MANAGEMENT LLC | Reduced | 1.6M | 1.5M | -62.6K |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND | Reduced | 145.6K | 92.1K | -53.5K |
| Y-Intercept (Hong Kong) Ltd | Increased | 3.1K | 54.8K | +51.7K |
| Brevan Howard Capital Management LP | New | 0 | 51.1K | +51.1K |
| Alpha Omega Wealth Management LLC | Increased | 10.9K | 61.5K | +50.6K |
| ICICI Prudential Asset Management Co Ltd | Sold Out | 49.3K | 0 | -49.3K |
| Gotham Asset Management, LLC | Reduced | 60.2K | 11.8K | -48.5K |
| RDST Capital LLC | Reduced | 295.3K | 247.1K | -48.2K |
| HEARTLAND ADVISORS INC | Increased | 58.3K | 104.9K | +46.6K |
| D. E. Shaw & Co., Inc. | Increased | 3.3K | 48.0K | +44.7K |
| CITIGROUP INC | Increased | 21.4K | 64.8K | +43.4K |
| BANK OF AMERICA CORP /DE/ | Increased | 263.9K | 303.5K | +39.7K |
| Cerity Partners LLC | Reduced | 84.0K | 44.4K | -39.6K |
| FIDEURAM - INTESA SANPAOLO PRIVATE BANKING S.P.A. | Sold Out | 39.4K | 0 | -39.4K |
| MARSHALL WACE, LLP | New | 0 | 39.1K | +39.1K |
| Schonfeld Strategic Advisors LLC | Reduced | 42.6K | 4.9K | -37.7K |
| FJ Capital Management LLC | New | 0 | 37.2K | +37.2K |
| Public Sector Pension Investment Board | Reduced | 192.2K | 157.3K | -34.9K |
| Mariner, LLC | Reduced | 79.1K | 44.8K | -34.4K |
13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.