Latest Period
Q1 2026
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
204
Shares (Excl. Options)
52,487,163
Price
$44.58
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- Security type / class
- Equity / COMMON STOCK
- Symbol
- MRX on Nasdaq
- Shares outstanding
- 73,037,471
- Reported price per share
- $55.90
- All holders as of 31 Mar 2026
- Q1 2026
- Total 13F shares
- 52,487,163
- Total reported value
- $2,327,269,973
- Portfolio coverage rank
- 0.01%
- Share change
- +1,497,497
- Value change
- +$77,143,698
- Number of holders
- 204
Security identity
Issuer context
Latest holder snapshot
Reported Shares, Excluding Options vs Price
Reported Value, Excluding Options
Total Investors
Key facts
- MRX - Marex Group plc - COMMON STOCK is tracked under CUSIP G5S37H101.
- 204 institutions reported positions in Q1 2026.
- 3 significant owners is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 191 to 204 between Q4 2025 and Q1 2026.
- Reported value moved from $1,960,905,328 to $2,327,269,973.
Research use
- 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.
Evidence
Source: SEC Form 13F
Open SEC Evidence
Latest holder context comes from 204 institutions filings for Q1 2026.
Security key
G5S37H101
Latest holder period
Q1 2026
13F holders
204
13D/G owners
3
CIK / CUSIP context first
Open Q1 2026 holders
MRX full holder history
Marex Group plc SEC filings
Marex Group plc company facts
Marex Group plc insider transactions
Broader feeds
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP G5S37H101:
13D/G owners
Significant owners
Large-stake holder rows connected to Schedule 13D/G evidence.
Rows
3
Security
MRX
| 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 Mar 2026, 204 institutional investors reported holding 52,487,163 shares of Marex Group plc - COMMON STOCK (MRX). This represents 72% of the company’s total 73,037,471 outstanding shares.
13F concentration
Top 25 institutional shareholders
Largest 13F positions for this security by reported shares and value.
Top holder share
53%
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| BlackRock, Inc. | 6% | 4,389,325 | +11% | 0% | $195,676,109 |
| Capital International Investors | 4.8% | 3,488,093 | 0% | 0.04% | $155,499,186 |
| FMR LLC | 4.8% | 3,481,911 | +161% | 0.01% | $155,223,593 |
| LOOMIS SAYLES & CO L P | 2.6% | 1,918,622 | -0.87% | 0.12% | $85,532,188 |
| PRICE T ROWE ASSOCIATES INC /MD/ | 2.6% | 1,906,029 | +23% | 0.01% | $84,971,000 |
| ALLIANCEBERNSTEIN L.P. | 2.4% | 1,730,125 | -1.1% | 0.02% | $66,367,595 |
| SAMLYN CAPITAL, LLC | 2.3% | 1,688,877 | +48% | 1.3% | $75,290,137 |
| TWO SIGMA INVESTMENTS, LP | 2.3% | 1,681,560 | +86% | 0.06% | $74,963,945 |
| JENNISON ASSOCIATES LLC | 2.2% | 1,606,691 | +8.9% | 0.05% | $71,626,284 |
| WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC | 2.1% | 1,566,181 | -9.9% | 0.23% | $69,820,349 |
| Invesco Ltd. | 1.9% | 1,372,768 | +6% | 0.01% | $61,197,998 |
| Grandeur Peak Global Advisors, LLC | 1.8% | 1,325,195 | -26% | 14% | $59,077,193 |
| VICTORY CAPITAL MANAGEMENT INC | 1.8% | 1,314,816 | +96% | 0.04% | $58,614,497 |
| ROYCE & ASSOCIATES LP | 1.7% | 1,252,790 | -0.63% | 0.55% | $55,849,378 |
| Ophir Asset Management Pty Ltd | 1.7% | 1,246,546 | +15% | 6.5% | $55,571,021 |
| Granahan Investment Management, LLC | 1.7% | 1,223,750 | -11% | 2.6% | $54,554,775 |
| Artisan Partners Limited Partnership | 1.7% | 1,216,883 | +34% | 0.09% | $54,248,644 |
| AMERIPRISE FINANCIAL INC | 1.3% | 954,242 | +11% | 0.01% | $42,540,108 |
| Allspring Global Investments Holdings, LLC | 1.2% | 908,596 | +12% | 0.07% | $39,115,058 |
| STATE STREET CORP | 1.2% | 873,461 | +4% | 0% | $38,938,891 |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND | 1% | 729,000 | -35% | 0.05% | $32,498,820 |
| GEODE CAPITAL MANAGEMENT, LLC | 0.99% | 726,494 | +2.4% | 0% | $32,387,101 |
| WELLINGTON MANAGEMENT GROUP LLP | 0.9% | 655,460 | -14% | 0.01% | $29,220,407 |
| Qube Research & Technologies Ltd | 0.81% | 592,606 | -22% | 0.04% | $26,418,375 |
| WESTWOOD HOLDINGS GROUP INC | 0.74% | 537,856 | -4.7% | 0.17% | $23,977,620 |
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
8
Latest
Q1 2026
Rows shown
1-8 of 8
| Period | Reported Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q1 | 52,487,163 | $2,327,269,973 | +$77,143,698 | $44.58 | 204 |
| 2025 Q4 | 51,131,295 | $1,960,905,328 | +$10,812,279 | $38.36 | 191 |
| 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 |