Simon van den Born - 22 May 2026 Form 4 Insider Report for Marex Group plc (MRX)

Reporting relationship: President
Issuer ticker: MRX
Reported as of: 22 May 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 27 May 2026, 16:05:05 UTC
Prior SEC filing: 22 Apr 2026
Source filing: View source filing
Reporting owner signature: /s/ Scott Linsley as Attorney-in-Fact, for Simon van den Born

Key filing fact

Simon van den Born filed Form 4 for Marex Group plc (MRX) on 27 May 2026.

Key facts

This page summarizes Simon van den Born's Form 4 filing for Marex Group plc (MRX).
1 reported transaction and 0 derivative rows are listed below.
Accepted by SEC: 27 May 2026, 16:05.

Change

Previous filing in this sequence was filed on 22 Apr 2026.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0002057618 Primary reporting owner

Van Den Born Simon

Relationship: President
Address: C/O MAREX GROUP PLC, 155 BISHOPSGATE, LONDON, UNITED KINGDOM
Signature: /s/ Scott Linsley as Attorney-in-Fact, for Simon van den Born
Signature date: 27 May 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

MRX transaction

Ordinary Shares

Tax liability

Transaction value
Shares: -43,712
Change %: -2.9%
Price: $54.45^*
Shares after: 1,465,252
Date: 22 May 2026
Ownership: Direct
Footnotes: F1, F2, F3

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 3 footnotes

Footnote F1

Represents the number of ordinary shares withheld to satisfy the tax withholding obligation in connection with the vesting of certain previously reported shares underlying deferred bonus plan awards.

Footnote F2

The price reported represents the closing price of the Issuer's ordinary shares on the Nasdaq Stock Market LLC on May 21, 2026.

Footnote F3

The number of ordinary shares reported herein includes 272,659 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.