Rex Securities Law Investment Fraud Attorney Investigates LPL Financial LLC Broker Sean Mostero

Rex Securities Law Investment Fraud Attorney Investigates LPL Financial LLC Broker Sean Mostero

Rex Securities Law Investment Fraud Attorney Investigates LPL Financial LLC Broker Sean Mostero 150 150 Robert Rex, Esq.

Last Updated: February 2025, Torrance, CA

Here’s what you need to know about Torrance, CA, former stockbroker Sean F. Mostero:

  • Name: Mr. Sean Francis Mostero
  • CRD Number: 6447158
  • Current Status: Barred from acting as a broker by FINRA
  • Prior Employers:
    • LPL Financial LLC (May 2023 – March 2024)
    • Cetera Advisors LLC (September 2022 – May 2023)
    • First Allied Securities, Inc. (July 2017 – September 2022)
  • Function: Stockbroker / Financial Advisor
  • Primary Location: Torrance, CA
  • DBA: Alessandra Capital Management
  • Can Sean Mostero be sued in FINRA arbitration? Yes
  • Sanctioned by FINRA: Yes (Permanent Bar from Industry)
  • Discharged by a Prior Employer: Yes
  • Pending Customer Dispute Seeks Damages of: $350,000.00

If you’ve sustained damages from Mr. Mostero, discuss your case with experienced investment fraud lawyer Bob Rex at (877) 224-3199 for a free consultation.

Did You Lose Money With Sean Mostero As Your Stockbroker?

Several significant issues and disclosures involving Sean Mostero have been reported:

  1. Regulatory Action by FINRA
    • Date Initiated: April 16, 2024
    • Sanction: Permanent Bar from association with any FINRA member
    • Reason: Failure to respond to FINRA requests for information in a regulatory investigation. This resulted in an automatic bar from association in all capacities effective July 19, 2024.
  2. Customer Dispute (Pending)
    • Filing Date: April 22, 2024
    • Docket/Case Number: 24-00874
    • Allegations: Claimant alleges that ,while employed by Cetera , Mr. Mostero engaged in an inappropriate relationship, failed to protect the client from poor financial decisions, and breached his duties of care, trust, and fair dealing.
    • Alleged Damages: $350,000.00
    • Arbitration Forum: FINRA – Los Angeles, CA
  3. Investigation by FINRA
    • Notice Date: March 24, 2024
    • Status: Pending Cause Examination
    • Details: Investigation is related to a customer complaint regarding inappropriate account withdrawals.
  4. Employment Termination
    • Date: February 29, 2024
    • Employer: Alessandra Capital Management, LLC
    • Reason for Termination: Discharged for abandoning his job and failing to cooperate with the firm’s requests for information following a complaint regarding his professional conduct.

Investigations involving Theft and Misappropriation of Customer Funds

Allegations of Broker Misconduct Against Sean Mostero

Regulators and a customers of Sean Mostero have alleged the following misconduct in connection with his handling of their investments:

  • Inappropriate Personal Relationship and Breach of Duties: Allegations indicate that Mr. Mostero failed to protect the client from poor financial decisions, breaching his fiduciary duties.
  • Failure to Respond to Regulatory Inquiries: His failure to provide requested information to FINRA in connection with their investigation led to a permanent bar from the securities industry, violating FINRA Rule 8210, which requires brokers to comply with FINRA’s requests for information.

Recover Your Investment Losses Now With Rex Securities Law

Our Investigations of other Cetera brokers

Investigation of LPL Financial and LPL Brokers-Lawsuits, Arbitrations & Customer Disputes

If you have suffered investment losses in an account handled by Sean F. Mostero, contact us for a complimentary consultation with an experienced securities lawyer to learn how you may be able to recover damages through FINRA arbitration.

What is FINRA Arbitration?

With offices in Boca Raton, FL, and Austin, TX, stockbroker fraud attorney Bob Rex provides representation to investors nationwide who are seeking recovery of investment losses due to the negligence or fraud of stockbrokers, financial advisors, and broker-dealers.

If you have questions about how your account has been handled, call (877) 224-3199 to speak with an experienced securities attorney at no cost to you.

Most cases are handled on a contingent fee basis, meaning that you do not pay legal fees unless we are successful.

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