Marex Group plc Ordinary Shares (MRX) ownership: Top institutional holder: BlackRock, Inc. ($195.68M). Insider activity: Net Seller (3 buys, 17 sells). SEC EDGAR first-party data.
| Holder | Shares | Market Value | Reported |
|---|---|---|---|
| BlackRock, Inc. | 4389325.00 | $195.68M | 2026-03-31 |
| Capital International Investors | 3488093.00 | $155.50M | 2026-03-31 |
| FMR LLC | 3481911.00 | $155.22M | 2026-03-31 |
| LOOMIS SAYLES & CO L P | 1918622.00 | $85.53M | 2026-03-31 |
| SAMLYN CAPITAL, LLC | 1688877.00 | $75.29M | 2026-03-31 |
| TWO SIGMA INVESTMENTS, LP | 1681560.00 | $74.96M | 2026-03-31 |
| JENNISON ASSOCIATES LLC | 1606691.00 | $71.63M | 2026-03-31 |
| WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC | 1566181.00 | $69.82M | 2026-03-31 |
| Insider | Transaction | Value | Date |
|---|---|---|---|
| Sell | null | 2026-06-15 | |
| Sell | null | 2026-06-15 | |
| Sell | null | 2026-06-15 | |
| Sell | null | 2026-06-12 | |
| Sell | null | 2026-06-12 | |
| Sell | null | 2026-06-09 | |
| Sell | null | 2026-06-09 | |
| Sell | null | 2026-06-09 |
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Institutional data from SEC Form 13F. Insider data from SEC Form 4. Congressional data from STOCK Act disclosures. Not personalized investment advice.