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Sean T. Prosser

Perkins Coie LLP
Bet-the-Company Litigation Class Action Defense High Stakes Litigation Mergers & Acquisitions Securities Litigation White-Collar Criminal Defense

Sean T. Prosser

Perkins Coie LLP
Bet-the-Company Litigation Class Action Defense High Stakes Litigation Mergers & Acquisitions Securities Litigation White-Collar Criminal Defense
858-720-5773
sprosser@perkinscoie.com
www.perkinscoie.com
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Bio

Sean Prosser, a former SEC enforcement attorney, leads Perkins Coie’s White Collar, Government Investigations and Securities Litigation practices in Southern California. With offices in San Diego and Los Angeles, Sean defends clients facing SEC investigations, DOJ investigations and grand jury proceedings, and other civil and criminal government and regulator investigations and enforcement proceedings. His clients include 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.

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 and merger litigation practices. 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.; Comps.com; 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 America, Super Lawyers and The Legal 500.  He was named Best Lawyers' "Attorney of the Year" for Securities Litigation (2018). 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.

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