Latest Period
Q4 2025
Security Snapshot
Marex Group plc - COMMON STOCK (MRX) Institutional Ownership
CUSIP: G5S37H101
13F Institutional Holders and Ownership History from Q2 2024 to Q1 2026
Institutions Reporting
190
Shares (Excl. Options)
51,131,278
Price
$38.36
Save this security page for your next review
Keep this CUSIP in your watchlists so you can revisit quarter changes from one place. If you create an account from here, we will bring you back after verification.
- Type / Class
- Equity / COMMON STOCK
- Symbol
- MRX on Nasdaq
- Shares outstanding
- 73,037,471
- Price per share
- $46.97
- All holders as of 31 Dec 2025
- Q4 2025
- Total 13F shares
- 51,131,278
- Total reported value
- $1,960,904,676
- % of total 13F portfolios
- 0%
- Share change
- -111,176
- Value change
- +$10,812,356
- Number of holders
- 190
Reported Shares, Excluding Options vs Price
Reported Value, Excluding Options
Total Investors
Quick Takeaways
- MRX - Marex Group plc - COMMON STOCK is tracked under CUSIP G5S37H101.
- 190 institutions reported positions in Q4 2025.
- 3 significant owners is listed from Schedule 13D/13G reporting.
What Changed
- Holder count moved from 190 to 68 between Q4 2025 and Q1 2026.
- Reported value moved from $1,960,904,676 to $362,958,771.
Why This Matters
- You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
- 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.
Source Evidence
Source: SEC Form 13F
Open SEC Evidence
Latest holder context comes from 190 institutions filings for Q4 2025.
Investment Quick Answers
What is CUSIP G5S37H101?
CUSIP G5S37H101 identifies MRX - Marex Group plc - COMMON STOCK in SEC 13F datasets.
Where can I see the latest institutional holders?
Review the Q4 2025 holders report and the ownership history table below.
Next ownership checks
Use the next link that matches the question you still need to answer about this security.
- Latest 13F filings when you want to inspect fresh institutional portfolio moves.
- Latest Schedule 13D/13G reports when you need large-owner changes outside the 13F cycle.
- All institutional ownership pages to compare this security with other holder-history pages.
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP G5S37H101:
Significant Owners of Marex Group plc - COMMON STOCK (MRX) based on Schedule 13D/G filings
| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| JRJ Investor 1 Limited Partnership | 10% | $282,614,171 | 7,160,826 | JRJ Investor 1 LP | 30 Jun 2025 | |||
| MASP Investor Limited Partnership | 7% | $198,304,539 | 5,024,604 | MASP Investor Limited Partnership | 30 Jun 2025 | |||
| FMR LLC | 5.1% | $174,959,070 | 3,724,911 | FMR LLC | 31 Mar 2026 |
As of 31 Dec 2025, 190 institutional investors reported holding 51,131,278 shares of Marex Group plc - COMMON STOCK (MRX). This represents 70% of the company’s total 73,037,471 outstanding shares.
Top 25 Institutional Shareholders
The largest institutional shareholders of Marex Group plc - COMMON STOCK (MRX) together control 49% of the company’s outstanding shares — a level of ownership often associated with strong institutional conviction and long‑term capital commitment.
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| BlackRock, Inc. | 5.4% | 3,966,534 | +6.8% | 0% | $152,156,245 |
| Capital International Investors | 4.8% | 3,488,093 | 0% | 0.02% | $133,803,247 |
| LOOMIS SAYLES & CO L P | 2.7% | 1,935,503 | +8.3% | 0.09% | $74,245,895 |
| Grandeur Peak Global Advisors, LLC | 2.4% | 1,779,743 | +1.5% | 9.2% | $68,270,941 |
| ALLIANCEBERNSTEIN L.P. | 2.4% | 1,750,252 | +12% | 0.02% | $67,139,667 |
| WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC | 2.4% | 1,738,927 | +372% | 0.19% | $66,705,240 |
| PRICE T ROWE ASSOCIATES INC /MD/ | 2.1% | 1,548,637 | +28% | 0.01% | $59,407,000 |
| JENNISON ASSOCIATES LLC | 2% | 1,475,255 | +1.5% | 0.03% | $56,590,782 |
| Balyasny Asset Management L.P. | 1.9% | 1,396,390 | +16% | 0.1% | $53,565,520 |
| Granahan Investment Management, LLC | 1.9% | 1,376,993 | +31% | 2.3% | $52,821,451 |
| FMR LLC | 1.8% | 1,334,798 | +76% | 0% | $51,202,850 |
| ADAGE CAPITAL PARTNERS GP, L.L.C. | 1.8% | 1,305,455 | -2% | 0.08% | $50,077,254 |
| Invesco Ltd. | 1.8% | 1,294,978 | +6.8% | 0.01% | $49,675,355 |
| ROYCE & ASSOCIATES LP | 1.7% | 1,260,709 | -11% | 0.49% | $48,360,797 |
| SAMLYN CAPITAL, LLC | 1.6% | 1,141,911 | +43% | 0.7% | $43,803,706 |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND | 1.5% | 1,114,349 | +3.7% | 0.07% | $42,746,428 |
| THORNBURG INVESTMENT MANAGEMENT INC | 1.5% | 1,102,143 | +5% | 0.53% | $42,278,206 |
| Ophir Asset Management Pty Ltd | 1.5% | 1,087,160 | 4.7% | $41,703,458 | |
| Artisan Partners Limited Partnership | 1.2% | 904,957 | +69% | 0.05% | $34,714,151 |
| TWO SIGMA INVESTMENTS, LP | 1.2% | 903,123 | -3.3% | 0.05% | $34,643,798 |
| AMERIPRISE FINANCIAL INC | 1.2% | 860,024 | -1.5% | 0.01% | $32,990,521 |
| STATE STREET CORP | 1.1% | 839,536 | +5.8% | 0% | $32,204,601 |
| Allspring Global Investments Holdings, LLC | 1.1% | 814,733 | -0.07% | 0.05% | $30,910,970 |
| Qube Research & Technologies Ltd | 1% | 763,460 | -27% | 0.04% | $29,286,326 |
| WELLINGTON MANAGEMENT GROUP LLP | 1% | 759,836 | +66% | 0.01% | $29,147,309 |
Institutional Holders of Marex Group plc - COMMON STOCK (MRX) across Reporting Periods
| Period | Reported Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q1 | 8,172,938 | $362,958,771 | +$12,272,725 | $44.58 | 68 |
| 2025 Q4 | 51,131,278 | $1,960,904,676 | +$10,812,356 | $38.36 | 190 |
| 2025 Q3 | 51,342,786 | $1,723,699,443 | -$9,291,389 | $33.62 | 190 |
| 2025 Q2 | 50,687,465 | $2,000,682,850 | +$917,690,273 | $39.47 | 194 |
| 2025 Q1 | 26,660,724 | $943,066,551 | +$9,297,530 | $35.32 | 121 |
| 2024 Q4 | 26,566,834 | $830,156,769 | +$297,974,409 | $31.17 | 106 |
| 2024 Q3 | 16,754,620 | $396,816,053 | +$54,343,471 | $23.62 | 71 |
| 2024 Q2 | 14,739,248 | $294,785,918 | +$294,785,921 | $20.00 | 59 |