Shawn Marcel Martin (CRD#4959418) and CITIGROUP GLOBAL MARKETS INC.

We can help you recover investment losses

If you were a client of this investment advisor, the securities lawyers at Halling & Cayo, S.C. would like to hear from you. We are analyzing potential claims related to the suitability of investments recommended by this broker.

Any previous customer complaints are made publicly available by FINRA. Reviewing these reports can help investors understand the regulatory history of their financial professionals.

Claim(s) Made Against Shawn Marcel Martin:

Claim Date: 4/21/2026

“Claimant alleges violations of Regulation BI, unsuitability, common law fraud and/or negligence, violation of FINRA’s Rules, and failure to supervise.”

This claim, as of this posting, is currently Pending with a claim amount of $126,000.00 .

See more information on FINRA’s BrokerCheck site for Shawn Marcel Martin.

Did you have problems in an account managed by Shawn Marcel Martin?

The Securities Lawyers at Halling & Cayo S.C. bring claims on behalf of individual(s) and/or groups of investors for recovery of their funds. Most customers will have signed a FINRA arbitration agreement to resolve disputes, including claims for reimbursement of investment losses. As the SEC reminds investors, it can be important to find an attorney that “specializes in resolving securities complaints.” (See our video, What are the steps of a FINRA Arbitration.) If you were a customer of Shawn Marcel Martin and CITIGROUP GLOBAL MARKETS INC. and suffered investment losses, please contact the Securities Lawyers. We only get paid if we recover your money. Your claim may be subject to a time limit or statute of limitations, so contact an attorney right away.
Learn about potential claims for investment recovery, Types of Broker Misconduct and Fraud , or about the FINRA arbitration process, Guide to the FINRA Arbitration Process .

If you were a customer of Shawn Marcel Martin and CITIGROUP GLOBAL MARKETS INC. from New York, NY and had a similar issue or experience as those described in the above public postings, we are interested in discussing a potential claim with you. Brokerage firms have a responsibility to supervise all representatives who are registered through their firm. (See our video, Warning signs of a bad financial advisor). Brokerage firms also must take steps to ensure that their financial advisors follow all securities rules and regulations, as well as internal firm policies. The brokerage firm is not only legally responsible for the acts of its agents, like Shawn Marcel Martin, the broker dealer may also be liable for investment losses sustained by customers for a failure to supervise. The Securities Lawyers at Halling & Cayo, S.C. have recovered millions of dollars for investors across the country.

Contact The Securities Lawyers

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Sean M. Sweeney is a shareholder at Halling and Cayo, a full service law firm in Milwaukee, WI and the head of its Securities Litigation team.

He represents individual and institutional investors in FINRA arbitration and court nationwide. He recovers investment losses from fraud or breach of duty from their broker-dealer.

Contact him at (414) 755-5020 or via e-mail at SMS@hallingcayo.com to see if he can help recover your funds.

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