As of November 6, 2026, 2 holders' latest Schedule 13D or 13G filings report owning 5% or more of Marex Group Plc. The largest reported stake is Fmr LLC's, at 7.5%. 8 filings are on record since July 24, 2025 (Schedule 13G/A, August 6, 2026).
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Key facts
- · Reporting person: T. Rowe Price Associates, Inc. · Sole voting: 4,922,536 · Shared voting: 0 · Sole dispositive: 4,922,536 · Shared dispositive: 0 · SCHEDULE 13G, 2026-08-14
- · Reporting person: MASP Investor Limited Partnership · Sole voting: 0 · Shared voting: 0 · Sole dispositive: 0 · Shared dispositive: 0 · SCHEDULE 13G/A, 2026-08-10
- · Reporting person: JRJ Investor 1 LP · Sole voting: 0 · Shared voting: 0 · Sole dispositive: 0 · Shared dispositive: 0 · SCHEDULE 13G/A, 2026-08-10
- · Reporting person: Fmr LLC · Sole voting: 5,367,964 · Shared voting: 0 · Sole dispositive: 5,368,485 · Shared dispositive: 0 · SCHEDULE 13G/A, 2026-08-06
- · Holder: Fmr LLC · Percent: 5.1% · SCHEDULE 13G
Marex Group Plc has 8 Schedule 13D or 13G filings on record since 2025-07-24. 2 holders' latest filing reports 5% or more of common stock. Each figure below is the holder's own, as filed, with the filing linked.
Holders
| Holder | Percent | Shares | Latest | Event date |
|---|---|---|---|---|
| Fmr LLC | 7.5% | 5,368,485 | SCHEDULE 13G/A, 2026-08-06 | 2026-06-30 |
| T. Rowe Price Associates, Inc. | 6.8% | 4,922,536 | SCHEDULE 13G, 2026-08-14 | 2026-06-30 |
| MASP Investor Limited Partnership | 0% | 0 | SCHEDULE 13G/A, 2026-08-10 | 2026-06-30 |
| JRJ Investor 1 LP | 0% | 0 | SCHEDULE 13G/A, 2026-08-10 | 2026-06-30 |
| Ocean Ring Jersey Co Limited | 0% | 0 | SCHEDULE 13G/A, 2025-07-28 | 2025-06-30 |
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More on Marex Group Plc and the records around it.
Marex Group Plc elsewhere on the record
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)
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Voting and dispositive power, as filed
| Reporting person | Sole voting | Shared voting | Sole dispositive | Shared dispositive | Filing |
|---|---|---|---|---|---|
| Fmr LLC | 5,367,964 | 0 | 5,368,485 | 0 | SCHEDULE 13G/A, 2026-08-06 |
| Abigail P. Johnson | 0 | 0 | 5,368,485 | 0 | SCHEDULE 13G/A, 2026-08-06 |
| T. Rowe Price Associates, Inc. | 4,922,536 | 0 | 4,922,536 | 0 | SCHEDULE 13G, 2026-08-14 |
| MASP Investor Limited Partnership | 0 | 0 | 0 | 0 | SCHEDULE 13G/A, 2026-08-10 |
| Forty Two Point Two Acquisition Limited | 0 | 0 | 0 | 0 | SCHEDULE 13G/A, 2026-08-10 |
| BXR Group Holdings Limited | 0 | 0 | 0 | 0 | SCHEDULE 13G/A, 2026-08-10 |
| JRJ Investor 1 LP | 0 | 0 | 0 | 0 | SCHEDULE 13G/A, 2026-08-10 |
| Amphitryon Limited (in liquidation) | 0 | 0 | 0 | 0 | SCHEDULE 13G/A, 2026-08-10 |
| JRJ Group Limited | 0 | 0 | 0 | 0 | SCHEDULE 13G/A, 2026-08-10 |
| Sir Jeremy Isaacs | 0 | 0 | 0 | 0 | SCHEDULE 13G/A, 2026-08-10 |
| Mr. Roger Nagioff | 0 | 0 | 0 | 0 | SCHEDULE 13G/A, 2026-08-10 |
The latest filing identifies Marex Group Plc by CUSIP G5S37H101 and gives its principal executive office as 155 BISHOPSGATE, LONDON (SCHEDULE 13G, 2026-08-14).
Timeline
| Filed | Holder | Percent | Filing |
|---|---|---|---|
| 2025-07-24 | MASP Investor Limited Partnership | 7.01% | SCHEDULE 13G/A |
| 2025-07-24 | JRJ Investor 1 LP | 9.99% | SCHEDULE 13G/A |
| 2025-07-28 | Ocean Ring Jersey Co Limited | 0% | SCHEDULE 13G/A |
| 2026-05-06 | Fmr LLC | 5.1% | SCHEDULE 13G |
| 2026-08-06 | Fmr LLC | 7.5% | SCHEDULE 13G/A |
| 2026-08-10 | MASP Investor Limited Partnership | 0% | SCHEDULE 13G/A |
| 2026-08-10 | JRJ Investor 1 LP | 0% | SCHEDULE 13G/A |
| 2026-08-14 | T. Rowe Price Associates, Inc. | 6.8% | SCHEDULE 13G |
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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Where this comes from
Anyone who comes to own more than 5% of a class of a listed company's voting shares has to tell the SEC. A holder who may seek to change or influence the company files Schedule 13D, and has to say in Item 4, "Purpose of Transaction", what it intends to do. A holder with no such intent, such as many index and passive funds, may file the shorter Schedule 13G. Both are amended when the stake changes, including when it falls below 5%.
Every row here is one of those filings, linked to the filing itself. Percentages and share counts are exactly as the holder filed them, for the holder the filing names; an amendment showing a lower figure is shown as filed. Item 4 text is quoted word for word. Where a 13D's Item 4 contains a sentence stating a definite intent to influence the company, that sentence is marked and quoted; the page does not describe the holder or its motives beyond the words it filed. Nothing here is investment advice.