September 4, 2025

Sean Mostero Barred, Linked To Cetera Advisors Client’s Breach Of Fiduciary Duty Claim

man with a smartphone looking at a digital line graph

Investors might have sustained losses through securities broker Sean Francis Mostero [CRD: 6447158, Torrance, California], according to public information found on FINRA BrokerCheck. Evidently, Mostero worked for First Allied Securities Inc. from July 7, 2017, to September 8, 2022, Cetera Advisors LLC from September 8, 2022, to May 3, 2023, and LPL Financial LLC from May 2, 2023, to March 26, 2024. Keep reading to learn more about the disclosures involving this securities broker.

Cetera Advisors Investor Accused Mostero Of Breach Of Fiduciary Duty

Specifically, a Cetera Advisors LLC client filed FINRA Arbitration No. 24-00874 about Sean Mostero. the client claimed that Mostero breached his fiduciary duty. Because of this, the client allegedly sustained $350,000 in damages. For this reason, on April 22, 2024, this matter was filed as pending arbitration before FINRA in Los Angeles, California.

Sean Mostero Barred By FINRA For Failure To Provide Information

Evidently, FINRA issued Case: 2024081064401 on May 10, 2024, sanctioning Sean Mostero. Allegedly, Mostero failed to provide information to FINRA. Consequently, Mostero was suspended and later barred permanently from association with any FINRA member in all capacities. The suspension began on May 10, 2024, and converted to a permanent bar on July 19, 2024, after Mostero did not request termination of his suspension.

FINRA Investigated LPL Financial LLC Stockbroker For Possibly Mishandling Withdrawals

Sean Mostero was the subject of an investigation initiated by FINRA on March 24, 2024, into allegations that Mostero mishandled withdrawals when Mostero was associated with LPL Financial LLC. The investigation is still ongoing.

Sean Mostero Discharged For Noncooperation And Absence

Particularly, a lessandra Capital Management LLC disaffiliated with Mostero on February 29, 2024. Allegedly, Mostero did not cooperate with the firm’s requests for information and stopped coming to the office.

Have You Made Investments Through Securities Broker Sean Mostero?

Do you need clarification on any investment losses relating to Sean Mostero? You should reach out to Soreide Law Group at (888) 760-6552 or online and consult with a securities lawyer regarding a possible recovery. For more than a decade, Soreide Law Group has recovered losses for investors throughout the US. Also, the firm takes cases on a contingency fee arrangement and advances all costs. Mostero and brokerage firms Mostero worked for deny accusations referenced within these public disclosures.

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