Marex Group PLC Securities Lawsuit Investigation

Shamis & Gentile P.A., one of the nation's premier class action law firms specializing in securities fraud cases, is investigating potential claims against Marex Group PLC (MRX).

If you sold short Marex Group securities between August 14, 2024 and August 5, 2025, you may be eligible to join this class action lawsuit and seek compensation for your losses.

About Marex Group

Marex Group is a U.K.-based diversified financial services platform founded in 2005. Marex provides liquidity, market access, and infrastructure services to clients in the energy, commodities, and financial markets.

Marex’s business is organized into several segments, including Clearing, Agency and Execution, Market Making, Hedging and Investment Solutions, and Corporate.

The Allegations

A class action complaint filed on October 9, 2025 alleges Marex and certain senior executives engaged in a multi-year practice that artificially inflated the company’s reported cash flow, revenues, assets, and profits, particularly within its Market Making segment.

According to the complaint, Marex allegedly used off-book intercompany transactions, recorded debt issuances as operating cash flow, and excluded significant off-balance-sheet liabilities tied to internal funds, which allegedly resulted in artificially inflated stock prices.

During the alleged class period (August 14, 2024, through August 5, 2025) Marex is accused of making materially false and misleading statements about its financial condition, liquidity, and growth prospects. The complaint asserts that the company failed to disclose structural accounting weaknesses, frequent financial restatements, and prior regulatory findings.

According to the complaint, these alleged materially false and/or misleading statements, and/or failures to disclose resulted in Marex securities trading at artificially inflated prices, causing financial harm to short sellers.

Important Dates

• Class period: August 14, 2024 to August 5, 2025
• Complaint filed: October 9, 2025
• Lead plaintiff deadline: December 8, 2025

Your Rights and Next Steps

If you sold short Marex Group (MRX) securities during the class period, you have important legal rights. You may be eligible to join the class action lawsuit and seek compensation for financial losses related to the alleged securities fraud.

Here are the steps you can take:

• Review your investment records to confirm short sales of Marex securities between August 14, 2024 and August 5, 2025.
• Evaluate your losses from short selling Marex securities at artificially inflated prices during the class period. Short sellers were harmed because the alleged fraud kept Marex's stock price artificially high, preventing them from profiting when the truth was eventually disclosed.
• Be aware of the deadline: the lead plaintiff motion must be filed by December 8, 2025. The lead plaintiff is the investor appointed by the court to represent the class and help direct the litigation.
• Participation is open to all eligible short sellers. Even if you do not seek to be a lead plaintiff, you may still recover a portion of your losses as a class member if the lawsuit is successful or results in a settlement.

Lawyers are available to help investors who sold short understand their rights, collect necessary documentation, and guide them through the process. If you are uncertain about your eligibility or have questions about your specific situation, you are encouraged to seek guidance as soon as possible.

You May Be Entitled to Compensation

If you engaged in short sales of Marex Group securities between August 14, 2024 and August 5, 2025, you may be entitled to compensation for your losses. The class action lawsuit seeks to recover damages for short sellers who were harmed by the alleged securities fraud.

To find out if you qualify and to take the next step, complete the below form. Lawyers are available to review your information and help you pursue your claim.