MRX at a glance
Marex Group plc (MRX, SEC CIK 1997464) filed Form 4 insider filings as recently as September 16, 2026. SignalX summarizes each filing with AI and tracks the company's insider trades and institutional holders.
- As of June 30, 2026, 29 institutional investment managers tracked by SignalX reported holding Marex Group plc (MRX) shares worth $1.5 billion in 13F-HR filings.
- The most recent insider open-market sale reported on Form 4 was by Tonucci Paolo on September 14, 2026 of 13,714 shares at $70.77 per share.
- In the last 90 days, MRX insiders reported 0 open-market purchases ($0) and 15 open-market sales ($7.0M) on Form 4, a net sale of $7.0M.
Source: SEC EDGAR (XBRL financial data, 13F-HR and Form 4 filings).
- Insiders · 90 days
- 0 buys · 15 sells
- Net −$7.0M
- 13F holders
- 29 funds
- $1.5B · +1 vs prior quarter
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Recent Insider Transactions (Form 4)
Latest reported trades by officers, directors and 10% owners
| Insider | Type | Date | Shares | Price |
|---|---|---|---|---|
| Tonucci Paolo | Sell | Sep 14, 2026 | 13,714 | $70.77 |
| Van Den Born Simon | Sell | Sep 14, 2026 | 2,655 | $71.36 |
| Van Den Born Simon | Sell | Sep 14, 2026 | 12,616 | $70.77 |
| Tonucci Paolo | Sell | Sep 14, 2026 | 2,952 | $71.35 |
| Van Den Born Simon | F | Sep 7, 2026 | 13,215 | $78.27 |
| Jethwa Nilesh | F | Sep 7, 2026 | 31,567 | $78.27 |
| Tonucci Paolo | F | Sep 7, 2026 | 18,293 | $78.27 |
| Lowitt Ian T | F | Sep 7, 2026 | 36,587 | $78.27 |
13F Fund Holdings: Quarterly Trend
Latest: Q2 2026Aggregate MRX share value held by 13F filers tracked by SignalX, by quarter.
Quarterly totals table
| Quarter | Funds | Total value |
|---|---|---|
| Q2 2026 | 29 | $1.50B |
| Q1 2026 | 28 | $843.4M |
| Q4 2025 | 29 | $563.5M |
| Q3 2025 | 27 | $560.2M |
| Q2 2025 | 27 | $576.8M |
| Q1 2025 | 13 | $150.4M |
| Q4 2024 | 9 | $60.0M |
| Q3 2024 | 7 | $41.8M |
- T. Rowe Price Group+3.02M (+158%)
- FMR LLC (Fidelity)+1.89M (+54%)
- Morgan Stanley+692.4K (+145%)
- Franklin Resources+479.7K (+821%)
- Vanguard Portfolio Management LLC+206.7K (+57%)
- WESTWOOD HOLDINGS GROUP INC−532.2K (-99%)
- Two Sigma Investments−346.1K (-21%)
- JPMorgan Chase & Co−216.8K (-47%)
- BNY Mellon−117.3K (-24%)
- Bank of America Corp−93.7K (-24%)
- Truist Financial+5.8K
- Hilltop Holdings Inc.+3.8K
- Citadel Advisors LLC−173.5K
Source: 13F-HR filings on SEC EDGAR (aggregated from 169 fund-quarter rows). Reflects only 13F filers tracked by SignalX, not the full institutional ownership universe. How 13F filings work
Latest 2026 SEC Filings: 10-K, 10-Q, 8-K & Form 4
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MRX SEC filings: frequently asked questions
Are MRX insiders buying or selling?
In the last 90 days, Marex Group plc (MRX) officers, directors and 10% owners reported no open-market purchases and 15 open-market sales worth $7.0 million by 4 insiders on Form 4. Many insider sales are pre-planned or for taxes, so purchases usually carry more information.
Which institutions hold MRX stock?
As of June 30, 2026, the largest Marex Group plc (MRX) holders among the 13F filers tracked by SignalX were FMR LLC (Fidelity) ($327.2 million), T. Rowe Price Group ($300.1 million), BlackRock ($280.0 million), Invesco Ltd ($85.6 million), Two Sigma Investments ($81.4 million). 13F-HR reports are filed up to 45 days after each quarter ends.
What are the latest MRX SEC filings?
Marex Group plc (MRX) filed a Form 4 insider filing on September 16, 2026.
What is MRX's SEC CIK number?
Marex Group plc (MRX)'s SEC Central Index Key (CIK) is 1997464. EDGAR lists every MRX filing under that number.
Ask anything about MRX
The research agent reads MRX's filings, financials, insider trades and 13F holders, then answers with sources.