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  4. [Form 4] Marex Group plc Insider Trading Activity

Marex Group (MRX) officer sells 16,668 shares in pre-set Rule 10b5-1 trades

Filing Impact
(Very High)
Filing Sentiment
(Negative)
Form Type
4

Rhea-AI Filing Summary

Marex Group plc officer Paolo Tonucci reported selling 16,668 Ordinary Shares of the company in open-market transactions. The sales occurred on May 11, 2026 at weighted average prices of $55.7185 and $56.315 per share under a pre-arranged Rule 10b5-1 plan entered into on October 22, 2025. After these trades, he continues to hold more than 1.3 million shares, which includes 286,871 shares underlying deferred bonus plan awards that give him a contingent right to receive one ordinary share for each award upon vesting.

Positive

  • None.

Negative

  • None.
Insider Tonucci Paolo
Role See Remarks
Sold 16,668 shs ($932K)
Type Security Shares Price Value
Sale Ordinary Shares 10,934 $55.7185 $609K
Sale Ordinary Shares 5,734 $56.315 $323K
Holdings After Transaction: Ordinary Shares — 1,352,423 shares (Direct, null)
Footnotes (1)
  1. The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 plan entered into by the Reporting Person on October 22, 2025. The price reported in Column 4 is a weighted average price. These shares were sold in transactions at prices ranging from $55.06 to $56.055 inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. The price reported in Column 4 is a weighted average price. These shares were sold in transactions at prices ranging from $56.065 to $56.74 inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. The number of ordinary shares reported herein includes 286,871 shares underlying deferred bonus plan awards previously granted to the Reporting Person. Each award represents a contingent right to receive one (1) ordinary share of the Issuer upon vesting and settlement of the applicable award.
Total shares sold 16,668 shares Net open-market sales on May 11, 2026
First sale size and price 5,734 shares at $56.315 Ordinary Shares, open-market sale on May 11, 2026
Second sale size and price 10,934 shares at $55.7185 Ordinary Shares, open-market sale on May 11, 2026
Post-transaction holdings (approximate) Over 1.3M shares Ordinary Shares held after May 11, 2026 sales
Deferred bonus plan awards 286,871 shares Shares underlying deferred bonus awards included in holdings
Trading plan adoption date October 22, 2025 Date Tonucci entered Rule 10b5-1 plan
Price range for first weighted average $55.06–$56.055 Range of prices for one sale group on May 11, 2026
Price range for second weighted average $56.065–$56.74 Range of prices for second sale group on May 11, 2026
Rule 10b5-1 plan regulatory
"The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 plan entered into by the Reporting Person"
A Rule 10b5-1 plan is a prearranged, written schedule that lets corporate insiders buy or sell company stock at set times or amounts, even if they later learn material nonpublic information. Think of it like setting an automatic thermostat for trades: it creates a clear record that trades were planned in advance, reducing the risk of insider-trading accusations and helping investors trust that insider transactions are routine rather than based on secret information.
weighted average price financial
"The price reported in Column 4 is a weighted average price"
Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.
deferred bonus plan awards financial
"includes 286,871 shares underlying deferred bonus plan awards previously granted to the Reporting Person"
Deferred bonus plan awards are payments promised to employees or executives that are earned now but paid out later, often only if certain performance goals are met or the employee remains with the company. For investors, they matter because they influence management’s incentives and company expenses over time—like a delayed paycheck that encourages someone to stay and meet targets—and can affect future cash needs, reported compensation costs, and potential share dilution.
Ordinary Shares financial
"The number of ordinary shares reported herein includes 286,871 shares underlying deferred bonus plan awards"
Ordinary shares are a type of ownership stake in a company, giving shareholders a right to participate in the company’s profits and decision-making through voting. They are similar to owning a piece of a business, and their value can rise or fall based on the company's performance. Investors buy ordinary shares to potentially earn dividends and benefit from the company's growth over time.
Form 4 Insider Transactions: What Each Field Means →
SEC Form 4
FORM 4UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
OMB APPROVAL
OMB Number:3235-0287
Estimated average burden
hours per response:0.5
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
X
Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.
1. Name and Address of Reporting Person*
Tonucci Paolo
(Last)(First)(Middle)
C/O MAREX GROUP PLC, 155 BISHOPSGATE
(Street)
LONDONUNITED KINGDOMEC2M 3TQ
(City)(State)(Zip)
UNITED KINGDOM
(Country)		2. Issuer Name and Ticker or Trading Symbol
Marex Group plc [ MRX ] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
Director10% Owner
XOfficer (give title below)Other (specify below)
See Remarks
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
05/11/2026		6. Individual or Joint/Group Filing (Check Applicable Line)
XForm filed by One Reporting Person
Form filed by More than One Reporting Person
4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year)2A. Deemed Execution Date, if any (Month/Day/Year)3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeVAmount(A) or (D)Price
Ordinary Shares05/11/2026S(1)10,934D$55.7185(2)1,352,423D
Ordinary Shares05/11/2026S(1)5,734D$56.315(3)1,346,689(4)D
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year)3A. Deemed Execution Date, if any (Month/Day/Year)4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year)7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Explanation of Responses:
1. The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 plan entered into by the Reporting Person on October 22, 2025.
2. The price reported in Column 4 is a weighted average price. These shares were sold in transactions at prices ranging from $55.06 to $56.055 inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
3. The price reported in Column 4 is a weighted average price. These shares were sold in transactions at prices ranging from $56.065 to $56.74 inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
4. The number of ordinary shares reported herein includes 286,871 shares underlying deferred bonus plan awards previously granted to the Reporting Person. Each award represents a contingent right to receive one (1) ordinary share of the Issuer upon vesting and settlement of the applicable award.
Remarks:
Chief Strategist and CEO, Capital Markets
/s/ Scott Linsley as Attorney-in-Fact, for Paolo Tonucci05/13/2026
** Signature of Reporting PersonDate
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

Source: View Original Filing on SEC EDGAR

FAQ

What insider transactions did Marex Group (MRX) report for Paolo Tonucci?

Marex Group reported that officer Paolo Tonucci sold a total of 16,668 Ordinary Shares on May 11, 2026. The sales were open-market transactions executed under a pre-arranged Rule 10b5-1 trading plan and disclosed on a Form 4 filing.

At what prices did Paolo Tonucci sell Marex Group (MRX) shares?

The reported sales used weighted average prices of $55.7185 and $56.315 per share. Footnotes state that individual trades occurred within price ranges of $55.06–$56.055 and $56.065–$56.74, with full breakdowns available from the company or regulator on request.

How many Marex Group (MRX) shares did Paolo Tonucci retain after the Form 4 sales?

Following the disclosed transactions, Tonucci holds more than 1.3 million Ordinary Shares of Marex Group. This reported total includes 286,871 shares underlying deferred bonus plan awards that entitle him to one ordinary share per award upon vesting and settlement.

Were the Marex Group (MRX) insider sales made under a Rule 10b5-1 plan?

Yes. A footnote explains the May 11, 2026 sale was executed under a Rule 10b5-1 plan that Tonucci entered into on October 22, 2025. Such pre-arranged plans automate trading and can reduce the significance of trade timing as a market signal.

What is the size of Paolo Tonucci’s deferred bonus awards in Marex Group (MRX)?

The filing states that Tonucci’s reported holdings include 286,871 Ordinary Shares underlying deferred bonus plan awards. Each award represents a contingent right to receive one Marex ordinary share when the related award vests and is settled, adding to his potential future share ownership.

How many Marex Group (MRX) insider sale transactions were reported on this Form 4?

The Form 4 shows two non-derivative sale transactions in Marex Group Ordinary Shares on May 11, 2026. Together, they total 16,668 shares sold, all classified as open-market sales according to the transaction code and description in the filing data.