June 13, 2026

Joseph Monaco Faced Oppenheimer Co. Inc. Investor Complaint Re: Unauthorized Transactions

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Investors may have suffered financial harm by securities broker Joseph Anthony Monaco Jr. [CRD: 1398158, Melville, New York], given the public information found on Financial Industry Regulatory Authority (FINRA) BrokerCheck. Monaco worked for Oppenheimer Co. Inc. from June 7, 2023, to December 6, 2024, and previously worked for Stifel Nicolaus from June 25, 2014, to June 30, 2023. See below to discover more about disclosures involving Monaco and the allegations asserted by clients.

Monaco Disclosed Unauthorized Trading Allegations By Oppenheimer Co. Inc. Client

Specifically, a client of Oppenheimer Co. Inc. contested Joseph Monaco’s sales practices, according to a complaint dated April 28, 2026. Allegedly, Monaco engaged in unauthorized transactions during 2024, which the client claimed resulted in a tax liability exceeding $1,000,000. It appears that Monaco allegedly caused the client to experience damages tied to stocks. Therefore, the client sought compensation from Oppenheimer Co. Inc. or Monaco in the amount of $1,000,000 in this matter. The complaint was denied on May 6, 2026.

Joseph Monaco Disclosed Churning, Misrepresentation, And Unsuitable Recommendations Allegations By Morgan Stanley Dean Witter Inc. Client

Also, a client of Morgan Stanley Dean Witter Inc. contested Joseph Monaco’s sales practices by filing NASD Arbitration No. 05-00105. Allegedly, Monaco made misrepresentations, engaged in churning, and made unsuitable recommendations, and Morgan Stanley failed to supervise. It appears that Monaco allegedly caused the client to sustain damages linked to mutual funds and stocks. As a result, Morgan Stanley Dean Witter Inc. agreed to settle the matter on June 22, 2006, by compensating the client in the amount of $155,000.

Did You Invest Through Securities Broker / Financial Advisor Monaco?

Do you need guidance on any investment losses relating to Joseph Monaco? If so, reach out to Soreide Law Group at (888) 760-6552 or online and speak to a securities attorney regarding a possible recovery of your investment losses. Soreide Law Group has recovered losses for clients throughout the United States. Also, our securities lawyers handle cases on a contingency fee basis and advance all costs. Monaco and brokerage firms Monaco worked for deny allegations of sales practice violations.

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