Loading Image
Sean T. Prosser's Profile Image

Sean T. Prosser

11988 El Camino Real, Suite 350 San Diego, California 92130-2594
Firm: Perkins Coie LLP
 |  Website
Edit Your Profile
To edit your Lawyer Directory information, please login to your
Best Lawyers® Admin Account.
If you have any questions or need assistance, please contact us at info@bestlawyers.com or 803.648.0300.

Perkins Coie LLP

Years In Practice

Phone Number (858) 720-5773

Sean Prosser, a former SEC enforcement attorney, is a Securities Litigation and White Collar criminal defense lawyer, principally representing clients facing shareholder lawsuits and criminal and civil government investigations. He has extensive experience in U.S. Securities and Exchange Commission (SEC) and U.S. Department of Justice (DOJ) investigations and proceedings, shareholder class actions, derivative and corporate control lawsuits, as well as conducting and defending internal investigations.

Sean's experience includes representing public and private companies, chief executives, directors and officers, broker-dealers, hedge funds, committees, accounting firms and public officials. He has a significant securities litigation practice with particular depth in California and Delaware-based actions. Sean also manages internal investigations, inquiries and enforcement proceedings initiated by regulatory authorities, including:

  • U.S. Securities and Exchange Commission (SEC) 
  • Financial Industry Regulatory Authority (FINRA) 
  • NYSE, Nasdaq and other exchanges 
  • California Department of Corporations 
  • U.S. Department of Justice (DOJ) 
  • Internal Revenue Service (IRS) 
  • U.S. Department of the Treasury, including OFAC 
  • Public Company Accounting Oversight Board (PCAOB)

Sean has represented the following companies over the course of his career: American Pacific Corp.; AML Communications; Ascend Communications; Cogent; Comps.com; Crocs; Digital Lightwave; dj Orthopedics; Dura Pharmaceuticals; EEX Corp.; Gemstar-TV Guide International; Gevo; Goya Foods; InfoSonics; Investment Placement Group; Intrepid Potash; Kintera; Kratos Defense & Securities Solutions; Ligand Pharmaceuticals; Mentor Corp.; Netlist; NetSol Technologies; Newmont Mining; Mallinckrodt plc; OncoSec Medical; Pepperball Technologies; Russell Investments; Schlotzky’s; SoftBank Corp.; Steakhouse Partners; Uber; Unison Healthcare; Wireless Facilities; and others. Sean’s vast industry experience includes advising and working with clients in financial services, technology, software, medical devices, pharmaceuticals, biotechnology and consumer products.

Sean Prosser is recognized by Legal 500 (US) for his expertise in Merger Litigation, and by Best Lawyers in America (2010-2018) for his expertise in Securities Litigation, Mergers & Acquisitions Litigation, SEC Enforcement Litigation, and Corporate Compliance & Corporate Governance Law. He also was named Best Lawyers' 2018 "Lawyer of the Year" for Securities Litigation and Best Lawyers' 2016 "Lawyer of the Year" for Corporate Governance. Mr. Prosser also is listed in San Diego SuperLawyers 2010-2018.

Sean is a member of the Board of Editors for the Corporate Counselor and a member of the Association for Securities and Exchange Commission Alumni (ASECA). He is also a member of the California Bar Association and the San Diego Bar Association. He is admitted to practice in California, before the U.S. District Courts for the Central and Southern Districts of California, and before the U.S. Court of Appeals for the Ninth Circuit.

What legal services does this lawyer offer?
Lawyer of the Year recognition for Sean T. Prosser
Named "Lawyer of the Year" by Best Lawyers® for:
Litigation - Securities, San Diego (2018)
Corporate Governance Law, San Diego (2016)
  • Best Lawyers, "Attorney of the Year," Securities Litigation (2018)
  • Best Lawyers, "Attorney of the Year," Corporate Governance (2016)
Contact Details and Office Locations
11988 El Camino Real, Suite 350
San Diego, California 92130-2594
Client Reviews & Commendations
Loading Image
* Denotes Required Fields
{{ error.Text }}
Your message was sent successfully!
We've encountered an error while sending your message. Please try again later.
Loading Image
Write a Client Review
{{ error.Text }}
Your client review was submitted successfully!
We've encountered an error while submitting your client review. Please try again later.
*If you are having any difficulty accessing your account, please contact us at info@lawyerregister.com.
Premium Profiles
Expand Your Presence
Access Exclusive Tools
And Much More...
Learn More
*If you are having any difficulty accessing your account, please contact us at info@lawyerregister.com.