MRX Marex Group Ltd: institutional ownership and insider trading
206 funds reported holding $3.35B of Marex Group Ltd in their latest 13F filings; in Q2 2026 funds net bought $259M, with 51 new positions and 37 funds selling out; over the last 12 months insiders bought $0 and sold $17.2M on the open market.
Famous investors holding MRX
- Two Sigma (Two Sigma Investments): $81.4M, 0.1% of the portfolio
- Renaissance Technologies (Renaissance Technologies): $11.0M, 0.0% of the portfolio
- Ken Griffin (Citadel Advisors): $3.21M, 0.0% of the portfolio
Largest institutional holders of MRX
- FMR LLC — $327M
- PRICE T ROWE ASSOCIATES INC /MD/ — $300M
- BlackRock, Inc. (BLK) — $280M
- Capital International Investors — $199M
- ALLIANCEBERNSTEIN L.P. — $116M
- LOOMIS SAYLES & CO L P — $99.1M
- SAMLYN CAPITAL, LLC — $90.4M
- Invesco Ltd. (IVZ) — $85.6M
- Ophir Asset Management Pty Ltd — $84.8M
- TWO SIGMA INVESTMENTS, LP — $81.4M
Recent MRX insider trades
- Oct 12, 2026: Tonucci Paolo sold 16,666 shares ($1.20M)
- Oct 12, 2026: Van Den Born Simon sold 15,272 shares ($1.10M)
- Sep 14, 2026: Van Den Born Simon sold 15,271 shares ($1.08M)
- Sep 14, 2026: Tonucci Paolo sold 16,666 shares ($1.18M)
5%+ owners
- FMR LLC: 7.5% (Schedule 13G/A, filed Aug 6, 2026)
- T. Rowe Price Associates, Inc.: 6.8% (Schedule 13G, filed Aug 14, 2026)