As of November 10, 2026, Marex Group plc is a publicly traded company (Nasdaq: MRX); its largest reported holder is Fidelity (FMR), with 7.5% on Schedule 13G/A of August 6, 2026, then T. Rowe Price (6.8%). The largest insider holding is Ian T. Lowitt, the chief executive and a director, with 2,835,472 shares (3.9% of shares outstanding), per Form 4 of September 9, 2026 (Schedule 13G/A, August 6, 2026).
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Is Marex Group plc a real, registered company?
- Marex Group plc files with the SEC under CIK 1997464 (its SEC filings).
- Its shares are listed under the ticker MRX on Nasdaq (SEC company record).
- Incorporated in D0, as its SEC filings state.
- Court and bankruptcy records: see Before you sign or pay below.
Before you sign or pay
- Court and bankruptcy: No federal court case or bankruptcy filing found under MAREX GROUP PLC in our court records and SEC 8-K records (as of 2026-11-10).
- Ownership: 5%+ holders are reported on Schedule 13D or 13G; the latest names T. Rowe Price (filed 2026-08-14).
Who are Marex Group plc's owners and officers?
Marex Group plc: industry Security & Commodity Brokers, Dealers, Exchanges & Services (Schedule 13G, 2026-08-14).
| Report | Holder | Share |
|---|---|---|
| Schedule 13G, 2026-08-14 | T. Rowe Price Associates, Inc. | 6.8% |
| Schedule 13G/A, 2026-08-10 | Jrj Investor 1 LP | 0% |
| Schedule 13G/A, 2026-08-10 | Masp Investor Limited Partnership | 0% |
| Schedule 13G/A, 2026-08-06 | Fmr LLC | 7.5% |
| Schedule 13G, 2026-05-06 | Fmr LLC | 5.1% |
| Schedule 13G/A, 2025-07-28 | Ocean Ring Jersey Co Limited | 0% |
| Schedule 13G/A, 2025-07-24 | Jrj Investor 1 LP | 9.99% |
| Schedule 13G/A, 2025-07-24 | Masp Investor Limited Partnership | 7.01% |
Questions about who owns Marex Group plc
Who owns Marex Group plc?
On this page, 2 holders' latest ownership filings report 5% or more of Marex Group plc: Fmr LLC (7.5%, Schedule 13G/A, filed 2026-08-06) and T. Rowe Price Associates, Inc. (6.8%, Schedule 13G, filed 2026-08-14).
Who are the largest shareholders of Marex Group plc?
By the share each holder's latest filing reports, the largest holders of Marex Group plc on this page are Fmr LLC (7.5%) and T. Rowe Price Associates, Inc. (6.8%).
When did Fmr LLC buy into Marex Group plc?
The filings give report dates, not purchase dates. The earliest filing from Fmr LLC on this page is the Schedule 13G, filed 2026-05-06, reporting 5.1%; its latest, Schedule 13G/A filed 2026-08-06, reports 7.5%.
Is this an audit or a full list?
Neither. The ownership list on this page covers only Schedule 13D and 13G filings, which holders make once they own 5% or more of a class of shares (an amendment can report a stake that has since fallen below 5%); 8 such filings are shown here. It is not an audit and not a full cap table: holders who never reached 5% are not listed, and a stake can change after its latest filing.
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Which insiders own Marex Group plc shares?
Directors, officers and holders of 10% or more report their shares on Forms 3, 4 and 5. Each line is the latest such report, largest holding first.
- , the chief executive and a director: 2,835,472 shares (3.9% of shares outstanding) (Form 4, 2026-09-09).
- , the president: 1,432,620 shares (2.0% of shares outstanding) (Form 4, 2026-11-09).
- Paolo Tonucci: 1,252,905 shares (1.7% of shares outstanding) (Form 4, 2026-10-14).
- , the chief executive and marex solutions: 282,950 shares (0.39% of shares outstanding) (Form 4, 2026-09-09).
- , the group head of clearing: 207,019 shares (0.28% of shares outstanding) (Form 4, 2026-06-03).
Shares outstanding: 72,937,470 as of 2025-12-31, from the company's latest SEC cover page.
How much has Marex Group plc raised?
Latest IPO step: Marex Group plc filed its final IPO prospectus (424B4, 2025-04-17).
IPO filings: 424B4, 2025-04-17, F-1, 2025-04-14, 424B4, 2024-10-31, 424B4, 2024-10-24, F-1/A, 2024-10-22.
Keep reading
More on Marex Group plc and the records around it.
Marex Group plc elsewhere on the record
- 5%+ stake filings Aug 2026
Companies that share a holder
- T. Rowe Price Associates, Inc. also filed stake reports on 191 other companies: PACIFIC BIOSCIENCES OF CALIF (Nov 2026), APARTMENT INVT & MGMT CO -A (Oct 2026), BETA BIONICS INC (Oct 2026)
- FMR LLC also filed stake reports on 761 other companies: ASPEN NEUROSCIENCE INC (Nov 2026), AVALO THERAPEUTICS INC (Nov 2026), BRAZE INC (Nov 2026)
Related pages
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https://mentionfox.com/who-owns/marex