Sonn Law Group is investigating claims on behalf of investors who suffered losses while working with Matthew “Matt” Gimmelli of Morgan Stanley.
Who Is Matthew Gimmelli?
Matthew Alfenso Gimmelli (CRD# 2740441) is a Scottsdale, Arizona financial advisor registered as both a broker and investment advisor with Morgan Stanley Smith Barney LLC and Morgan Stanley Private Bank, N.A. He is a Managing Director, Chartered Financial Analyst®, and Senior Portfolio Management Director with the Viewpoint Wealth Management Group at Morgan Stanley’s office at 14850 North Scottsdale Road, Suite 600.
FINRA records reflect 29 years of securities industry experience, with a career beginning in 1996. He has been registered with Morgan Stanley entities since 2016, and his prior registrations include UBS Financial Services, Citigroup Global Markets, Vanguard Marketing Corporation, and Fortis Investors. He has passed the SIE, Series 6, Series 7, Series 31, Series 63, and Series 65 examinations.
The Pending Customer Complaint
Gimmelli’s FINRA BrokerCheck report discloses one investor complaint. Filed in March 2026, it alleges that, as a representative of Morgan Stanley, he violated Regulation Best Interest and misrepresented the fees and costs associated with the customer’s accounts. The complaint seeks $1.035 million in damages and remains pending – meaning the allegations have not been proven or adjudicated.
Why Fee and Cost Disclosures Matter
Rule 15l-1(a)(1) of the Securities Exchange Act of 1934 — Regulation Best Interest — requires advisors to recommend only investments and strategies that are in their clients’ best interests, without placing the firm’s or broker’s financial interests ahead of the customer’s. Reg BI’s Disclosure Obligation specifically requires full and fair disclosure of all material fees and costs applying to a customer’s transactions, holdings, and accounts.
When fees are understated, buried, or mischaracterized, investors lose the ability to judge whether a recommendation actually serves them. Brokerage firms like Morgan Stanley must reasonably supervise their registered representatives – and may be held liable for investor losses caused by supervisory failures. That duty is heightened for senior, high-producing advisors managing discretionary portfolios.
Recovering Investment Losses Through FINRA Arbitration
Most brokerage customer agreements require disputes to be resolved through FINRA arbitration rather than in court. Arbitration is typically faster and less expensive than litigation, and investors can recover compensatory damages, interest, costs, and in some cases attorneys’ fees. Claims are generally subject to FINRA’s six-year eligibility rule, and state statutes of limitations may be shorter, so acting promptly matters.
Contact Sonn Law Group Today
Sonn Law Group represents investors nationwide in FINRA arbitration claims against brokers and brokerage firms. If you invested with Matthew Gimmelli at Morgan Stanley and suffered losses, our attorneys will review your accounts and explain your options.
We work on a contingency fee basis – you owe nothing unless we recover for you.
Disclaimer: The allegations described above are pending and unproven. Nothing here constitutes a finding of wrongdoing by Matthew Gimmelli or Morgan Stanley. Investors should consult FINRA BrokerCheck directly. This post is informational and not legal advice.
