MRX: Marex Group plc insider trading, 5% holders and institutional ownership
From public SEC filings: open-market insider purchases and sales (Form 4, last 180 days), holders of 5% or more (Schedules 13D and 13G) and institutional ownership (Form 13F). Insider and 5% data delayed 48 hours.
Insider trading
0 open-market buys totaling - and 4 sales totaling $2.30M in the last 180 days.
Insider sales
| Trade date | Insider | Role | Value | 10b5-1 plan |
|---|---|---|---|---|
| 2026-10-12 | Van Den Born Simon | President | $1.01M | yes |
| 2026-10-12 | Van Den Born Simon | President | $92K | yes |
| 2026-10-12 | Tonucci Paolo | Officer | $1.12M | yes |
| 2026-10-12 | Tonucci Paolo | Officer | $84K | yes |
Activist and 5% holders
| Filed | What | Holder | Stake | Change | Filing |
|---|---|---|---|---|---|
| 2026-08-14 | New 13G stake | T. Rowe Price Associates, Inc. | 6.80% | SEC | |
| 2026-08-10 | Fell below 5% | JRJ Investor 1 LP | 0.00% | SEC | |
| 2026-08-10 | Fell below 5% | MASP Investor Limited Partnership | 0.00% | SEC | |
| 2026-08-06 | 13G amendment | FMR LLC | 7.50% | SEC |
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