Who Owns Marketaxess Holdings In (MKTX)? -- Institutional Holders (2026-06-30)
495 institutions reported holding $4.74B of Marketaxess Holdings In (MKTX) in SEC 13F filings for 2026-06-30. Largest institutional holders: BlackRock, Inc. ($453.9M), VANGUARD GROUP INC ($445.7M), PRIMECAP MANAGEMENT CO/CA/ ($397.8M), North Reef Capital Management LP ($385.3M), AQR CAPITAL MANAGEMENT LLC ($222.8M). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|
| 1 | BlackRock, Inc. | $453.9M | 4.0M | Trimmed |
| 2 | VANGUARD GROUP INC | $445.7M | 3.9M | Trimmed |
| 3 | PRIMECAP MANAGEMENT CO/CA/ | $397.8M | 3.5M | Added |
| 4 | North Reef Capital Management LP | $385.3M | 3.4M | Added |
| 5 | AQR CAPITAL MANAGEMENT LLC | $222.8M | 2.0M | Trimmed |
| 6 | FMR LLC | $159.5M | 1.4M | Trimmed |
| 7 | STATE STREET CORP | $145.4M | 1.3M | Added |
| 8 | NEUBERGER BERMAN GROUP LLC | $139.6M | 1.2M | Added |
| 9 | MILLENNIUM MANAGEMENT LLC | $131.2M | 1.2M | Trimmed |
| 10 | CITIGROUP INC | $120.8M | 1.1M | Added |
| 11 | GOLDMAN SACHS GROUP INC | $117.0M | 1.0M | Added |
| 12 | BANK OF MONTREAL /CAN/ | $115.4M | 1.0M | Trimmed |
| 13 | GEODE CAPITAL MANAGEMENT, LLC | $112.9M | 994,772 | Added |
| 14 | VAN ECK ASSOCIATES CORP | $104.9M | 924,617 | Trimmed |
| 15 | DIMENSIONAL FUND ADVISORS LP | $67.8M | 597,894 | Added |
| 16 | NORGES BANK | $65.0M | 572,422 | Added |
| 17 | CITADEL ADVISORS LLC | $62.2M | 548,489 | Added |
| 18 | GUARDCAP ASSET MANAGEMENT Ltd | $62.2M | 536,324 | Trimmed |
| 19 | TWO SIGMA INVESTMENTS, LP | $61.7M | 543,890 | Added |
| 20 | Azora Capital LP | $58.2M | 513,081 | New |
| 21 | Davis Asset Management, L.P. | $56.7M | 500,000 | Added |
| 22 | JPMORGAN CHASE & CO | $48.3M | 438,001 | Added |
| 23 | MORGAN STANLEY | $48.0M | 422,864 | Trimmed |
| 24 | LOS ANGELES CAPITAL MANAGEMENT LLC | $44.5M | 392,065 | Added |
| 25 | Sixth Street Partners Management Company, L.P. | $37.5M | 330,815 | New |
Source: SEC Form 13F filings · as of 2026-06-30