Who Owns MAREX GROUP PLC (MRX)? -- Institutional Holders (2026-06-30)
258 institutions reported holding $3.44B of MAREX GROUP PLC (MRX) in SEC 13F filings for 2026-06-30. Largest institutional holders: FMR LLC ($327.2M), PRICE T ROWE ASSOCIATES INC /MD/ ($300.1M), BlackRock, Inc. ($280.0M), Capital International Investors ($199.0M), ALLIANCEBERNSTEIN L.P. ($115.9M). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|
| 1 | FMR LLC | $327.2M | 5.4M | Added |
| 2 | PRICE T ROWE ASSOCIATES INC /MD/ | $300.1M | 4.9M | Added |
| 3 | BlackRock, Inc. | $280.0M | 4.6M | Added |
| 4 | Capital International Investors | $199.0M | 3.3M | Trimmed |
| 5 | ALLIANCEBERNSTEIN L.P. | $115.9M | 2.6M | Added |
| 6 | WASATCH ADVISORS LP | $102.6M | 1.7M | Added |
| 7 | LOOMIS SAYLES & CO L P | $99.1M | 1.6M | Trimmed |
| 8 | SAMLYN CAPITAL, LLC | $90.4M | 1.5M | Trimmed |
| 9 | Invesco Ltd. | $85.6M | 1.4M | Added |
| 10 | Ophir Asset Management Pty Ltd | $84.8M | 1.4M | Added |
| 11 | TWO SIGMA INVESTMENTS, LP | $81.4M | 1.3M | Trimmed |
| 12 | VICTORY CAPITAL MANAGEMENT INC | $78.7M | 1.3M | Trimmed |
| 13 | Granahan Investment Management, LLC | $76.4M | 1.3M | Added |
| 14 | MORGAN STANLEY | $71.3M | 1.2M | Added |
| 15 | ROYCE & ASSOCIATES LP | $67.7M | 1.1M | Trimmed |
| 16 | STATE STREET CORP | $62.6M | 1.0M | Added |
| 17 | WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC | $61.5M | 1.0M | Trimmed |
| 18 | HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND | $61.5M | 1.0M | Added |
| 19 | AMERIPRISE FINANCIAL INC | $55.1M | 904,162 | Trimmed |
| 20 | GEODE CAPITAL MANAGEMENT, LLC | $52.9M | 897,253 | Added |
| 21 | WELLINGTON MANAGEMENT GROUP LLP | $47.2M | 775,023 | Added |
| 22 | WESTFIELD CAPITAL MANAGEMENT CO LP | $42.0M | 688,665 | New |
| 23 | VANGUARD GROUP INC | $37.8M | 620,187 | Added |
| 24 | JENNISON ASSOCIATES LLC | $36.8M | 604,393 | Trimmed |
| 25 | GOLDMAN SACHS GROUP INC | $33.6M | 551,753 | Added |
Source: SEC Form 13F filings · as of 2026-06-30