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Sean Thomas Prosser

Sean Thomas Prosser

Practice areas:

Securities & Investment Fraud, White Collar Crime

Client reviews

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Practice Areas

Licensed since 1993

  1. Securities & Investment Fraud: 60%
    23 years, 100 cases
  2. White Collar Crime: 40%
    23 years, 40 cases

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Contact Info

Perkins Coie LLP

11988 El Camino Real
Suite 200
San Diego, CA, 92130-2594




Professional Misconduct

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

Avvo Contributions

Legal Answers


Award NameGrantorDate Granted
San Diego Super Lawyers - Securities LitigationSuper Lawyers2014
Recommended Lawyer - Merger LitigationLegal 5002014
San Diego Super Lawyer - Securities LitigationSuper Lawyers2013
Recommended Lawyer - Merger LitigationLegal 5002013
Recommended Lawyer-Merger LitigationLegal 5002012
Best Lawyer, Corporate Governance & Compliance LawBest Lawyers in America2011
Best Lawyer, SEC Enforcement LitigationBest Lawyers in America2011
Best Lawyer, Commercial, Securities and M&A LitigationBest Lawyers in America2011
San Diego Super Lawyer (Securities Litigation)Super Lawyers2011
San Diego Super Lawyers (Securities Litigation)Super Lawyers2010
Best Lawyers in America-Comm. Lit and Corp. Gov & ComplBest Lawyers in America2010

Work Experience

TitleCompany NameDuration
PartnerPerkins Coie LLP2014 - Present
PartnerMorrison & Foerster2005 - 2014


Association NamePosition NameDuration
Association of SEC AlumniMember1994 - Present

Legal Cases

Case NameOutcome
In re Mentor Corp. Shareholder LitigationWon summary judgment
In re Netlist, Inc. Securities LitigationSettled following winning motion to dismiss
In re Cogent, Inc. Shareholder LitigationDefeated injunction motion; case pending

See all Legal Cases 


Publication NameTitleDate
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 AuthorFiduciary Duties of Corporate Directors and Officers2011
California Lawyer MagazineSecurities Litigation Roundtable2009
California Lawyer MagazineSecurities Litigation Roundtable2008


School NameMajorDegreeGraduated
New York Law SchoolN/AlawN/A
Univ of PennsylvaniaN/AundergraduateN/A

Speaking Engagements

Conference NameTitleDate
AICPA National Audit Committee ForumCrisis Management for Audit Committees2010
Association of Corporate Counsel-America“The ‘New’ SEC — What Does It Mean to You?”2009
CLE International Subprime Lending Litigation Conference.Developments in Securities Litigation2008
Advanced Securities Law Workshop 2007Federal Securities Law Developments2007
21st Annual National SEC Reporting ConferenceNew Trends in SEC Investigations and Class Action Litigation2005