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Sean Thomas Prosser

Securities and investment fraud Attorney at San Diego, CA

Not yet reviewed
  • Licensed for 31 years
    State CA
    Acquired 1993
    Status
    Active No misconduct found

We have not found any instances of professional misconduct for this lawyer.

About Sean

Learn Sean’s areas of practice.

3
Practice areas
  1. Securities and investment fraud
    50%
    Defend companies and their officers, directors, and employees in civil SEC and criminal DOJ investigations and prosecutions related to alleged violations of federal and state securities laws

    32 years, 100 cases

  2. Federal crime
    25%

    32 years, 40 cases

  3. White collar crime
    25%
    Defend companies and their officers, directors, and employees in civil SEC and criminal DOJ investigations and prosecutions related to alleged violations of federal and state securities laws

    32 years, 40 cases

Sean Prosser is a highly experienced litigator with significant experience defending clients facing shareholder litigation, SEC, FINRA, and DOJ investigations and enforcement actions, and other civil and criminal government and regulator investigations and enforcement proceedings. His clients have included public and private companies, officers and directors, board committees, broker-dealers, banks, investment advisors, hedge funds, certified public accountants, individual stock traders, and public officials.

A former SEC enforcement attorney, Sean has defended many clients in securities investigations and white-collar actions initiated by regulatory authorities across the country and with a focus on California.

With a particular practice depth defending clients in securities investigations and white collar actions initiated by regulatory authorities in Los Angeles, San Diego and throughout California, Sean regularly represents clients before the following agencies and regulators:

  • U.S. Securities and Exchange Commission (SEC) 
  • U.S. Department of Justice (DOJ)
  • Financial Industry Regulatory Authority (FINRA) 
  • NYSE, NASDAQ and other stock exchanges 
  • California Department of Corporations 
  • U.S. Department of the Treasury, including Financial Crimes Enforcement Network (FinCEN) and Office of Foreign Assets Control (OFAC)   
  • Public Company Accounting Oversight Board (PCAOB) 
  • Internal Revenue Service (IRS) 

Sean also has a significant securities litigation practice. He defends public companies and their executives facing shareholder lawsuits in state and federal courts across the country, including the Delaware Court of Chancery.

During the course of his career, Sean has represented such companies as:   American Pacific Corporation; AML Communications; Ascend Communications; Cogent, Inc.; ; Digital Lightwave; dj Orthopedics; Dura Pharmaceuticals; EEX Corp.; Gemstar-TV Guide International; Goya Foods; Kintera; Kratos Defense & Security Solutions; Ligand Pharmaceuticals; Mentor Corp.; Netlist; NETSOL Technologies; Mallinckrodt Pharmaceuticals; PepperBall Technologies; Schlotzsky’s; SoftBank Corp.; Steakhouse Partners; Unison Healthcare; Wireless Facilities; and others.

Sean is recognized by Best Lawyers in AmericaSuper Lawyers and The Legal 500. He also sits on the Board of Editors of The Corporate Counselor. Sean has written and spoken extensively about SEC enforcement and securities matters, with a focus on insider trading, anti-money laundering, derivative claims and mergers, and fiduciary duty issues.

Location

Mintz Levin Cohn Ferris Glovsky & Popeo, PC
3580 Carmel Mountain Road
Suite 300
San Diego, CA, 92130

Investment Fraud lawyers nearby

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Contact for Details

Resume

AVVO RATING 9.3 (Superb)

Work Experience

  • Member
  • Mintz Levin Cohn Ferris Glovsky & Popeo, PC
  • 2019 - Present
  • Partner
  • Perkins Coie LLP
  • 2014 - 2019
  • Partner
  • Morrison & Foerster
  • 2005 - 2014
  • Enforcement Attorney
  • U.S. Securities & Exchange Commission
  • 1992 - 1994
View all work experience

Education

  • New York Law School
  • JD - Juris Doctor
  • 1992
  • Univ of Pennsylvania
  • BA - Bachelor of Arts
  • 1986

Sample of Legal Cases

  • In re Mentor Corp. Shareholder Litigation
  • Won summary judgment
  • In re Cogent, Inc. Shareholder Litigation
  • Defeated injunction motion; case pending
  • In re Netlist, Inc. Securities Litigation
  • Settled following winning motion to dismiss

Associations

  • Association of SEC Alumni
  • Member
  • 1994 - Present

Languages Spoken

  • English

Honors and Awards

  • San Diego Super Lawyer
  • Super Lawyers Magazine
  • 2019
  • Attorney of the Year - Corporate Governance
  • Best Lawyers in America
  • 2016
  • Recommended Lawyer - Merger Litigation
  • Legal 500
  • 2014
  • San Diego Super Lawyers - Securities Litigation
  • Super Lawyers
  • 2014
  • Recommended Lawyer - Merger Litigation
  • Legal 500
  • 2013
  • San Diego Super Lawyer - Securities Litigation
  • Super Lawyers
  • 2013
  • Recommended Lawyer-Merger Litigation
  • Legal 500
  • 2012
  • San Diego Super Lawyer (Securities Litigation)
  • Super Lawyers
  • 2011
  • Best Lawyer, Commercial, Securities and M&A Litigation
  • Best Lawyers in America
  • 2011
  • Best Lawyer, SEC Enforcement Litigation
  • Best Lawyers in America
  • 2011
  • Best Lawyer, Corporate Governance & Compliance Law
  • Best Lawyers in America
  • 2011
  • Best Lawyers in America-Comm. Lit and Corp. Gov & Compl
  • Best Lawyers in America
  • 2010
  • San Diego Super Lawyers (Securities Litigation)
  • Super Lawyers
  • 2010
View all awards

Publications

  • Inside the Minds: Recent Developments in Securities Laws (Aspatore Books)
  • "Rebuilt for Speed: Defending SEC Investigations in the Post-Financial Crisis Era"
  • 2012
  • RR Donnelley-Contributing Author
  • Fiduciary Duties of Corporate Directors and Officers
  • 2011
View all publications

Speaking Engagements

  • Association of Corporate Counsel-America
  • “The ‘New’ SEC — What Does It Mean to You?”
  • 2009
  • CLE International Subprime Lending Litigation Conference.
  • Developments in Securities Litigation
  • 2008
  • Advanced Securities Law Workshop 2007
  • Federal Securities Law Developments
  • 2007
  • 21st Annual National SEC Reporting Conference
  • New Trends in SEC Investigations and Class Action Litigation
  • 2005
View all speaking engagements

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San Diego Securities and investment fraud Lawyer Sean Thomas Prosser
Sean Thomas Prosser
Securities and investment fraud Attorney
San Diego, CA
Licensed for 31 years