Marex Group plc Ordinary Shares (MRX)
Who owns Marex Group plc Ordinary Shares (MRX)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 70.7% of the shares are freely tradable; institutional investors hold 75.2%.
Ownership Structure
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| BlackRock Inc | 6.10 | 4,389,325 | +10.7 | 03/31/2026 |
| Capital Research & Mgmt Co - Division 3 | 4.85 | 3,488,093 | +0.0 | 03/31/2026 |
| FMR Inc | 4.84 | 3,481,911 | +160.9 | 03/31/2026 |
| Loomis, Sayles & Company LP | 2.67 | 1,918,622 | -0.9 | 03/31/2026 |
| T. Rowe Price Associates, Inc. | 2.65 | 1,906,029 | +23.1 | 03/31/2026 |
| AllianceBernstein L.P. | 2.41 | 1,730,125 | -1.1 | 03/31/2026 |
| Samlyn Capital, LLC | 2.35 | 1,688,877 | +47.9 | 03/31/2026 |
| Two Sigma Investments LLC | 2.34 | 1,681,560 | +86.2 | 03/31/2026 |
| Jennison Associates LLC | 2.23 | 1,606,691 | +8.9 | 03/31/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| American Funds SMALLCAP World A | 4.85 | 3,488,093 | +0.0 | 03/31/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 13. Jul 2026 | Tonucci Paolo | See Remarks | Sell | 232 | 65.73 | 15,249 |
| 13. Jul 2026 | Tonucci Paolo | See Remarks | Sell | 4,584 | 64.85 | 297,271 |
| 13. Jul 2026 | Tonucci Paolo | See Remarks | Sell | 11,850 | 64.22 | 761,058 |
| 13. Jul 2026 | Lowitt Ian T | Chief Executive Officer | Sell | 787 | 65.84 | 51,819 |
| 13. Jul 2026 | Lowitt Ian T | Chief Executive Officer | Sell | 8,957 | 64.90 | 581,325 |
| 13. Jul 2026 | Lowitt Ian T | Chief Executive Officer | Sell | 27,398 | 64.19 | 1,758,560 |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character.
View all insider transactions →Data as of: July 31, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.