Allyson Slater regularly represents individuals and companies in complex civil litigation matters in both state and federal court, as well as in connection with enforcement matters brought by the Securities Exchange Commission and Department of Justice.

Ms. Slater regularly represents clients in a wide variety of civil litigation matters, including securities class actions, trademark disputes, civil antitrust matters and complex commercial litigation. In addition, Ms. Slater has extensive experience conducting high-stakes investigations for corporate clients. Ms. Slater's investigations experience includes internal investigations, as well as investigations under the securities laws, the Bank Secrecy Act and Anti-Money Laundering statutes, and the Foreign Corrupt Practices Act.

Ms. Slater also maintains an active pro bono practice. She successfully represented a California state prisoner who was serving a sentence of 50 years to life for a nonviolent offense in his successful petition for a shorter sentence under Proposition 36, which reformed California's Three Strikes Law. She also represented a victim and testifying witness in a criminal trial under the federal “sex tourism” statute (18 U.S.C. § 2423), which resulted in conviction of the defendant on all counts. 

Ms. Slater is a member of WilmerHale's Pro Bono and Public Service Committee.


  • Investigations

    • Conducted an investigation of whistleblower allegations concerning a company’s security and competitive intelligence practices on behalf of a special committee of a technology company
    • Represented a former BSA/AML officer in an investigation by the DOJ
    • Represented audit committee of board of directors of networking technology company in SEC and DOJ inquiries into business practices in Russia and allegations implicating anti-bribery, internal controls, and books and records provisions of the Foreign Corrupt Practices Act
  • Litigation

    • Defending major American brewery in trademark dispute brought by a California-based brewery
    • Successfully defended major movie exhibitor in federal and state actions where other exhibitors alleged unlawful clearance agreements and purported circuit dealing in violation of the Sherman Act and state laws
    • Represented pharmaceutical manufacturer in qui tam litigation concerning alleged fraudulent claims submitted to insurers 

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  • Education

    • JD, University of Southern California Law School, 2012

      Senior Note Editor, Southern California Law Review, Public Interest Law Foundation Grant Recipient
    • BA, History, Boston College, 2006

  • Admissions

    • Massachusetts

    • California