David J. Wiener

David J. Wiener
Partner

425 Market Street

San Francisco, CA 94105-2482

dwiener@mofo.com

(415) 268-6441

BAR ADMISSIONS

California

EDUCATION

University of California, Santa Barbara, B.A.

University of California, Davis, School of Law, J.D.

David is a partner in Morrison Foerster's San Francisco office and a member of the firm’s Securities Litigation group. His practice focuses on the representation of public companies and their officers and directors in securities fraud class actions, shareholder derivative lawsuits, and other high-stakes litigation. He also regularly advises boards and management on shareholder demands, disclosure issues, and governance matters. David has represented clients across a range of industries including technology, social media, manufacturing, financial services, and healthcare, and has litigated at the civil trial and appellate court levels in federal and state courts throughout California and the Delaware Court of Chancery.

David’s experience includes defending claims arising under:

  • The Securities Act of 1933
  • The Securities Exchange Act of 1934

  • The Private Securities Litigation Reform Act

  • The Securities Litigation Uniform Standards Act

  • The California Corporations Code

  • The Delaware General Corporation Law

David received his J.D. from the UC Davis School of Law, where he was elected to the Order of the Coif and was an articles editor of the UC Davis Law Review. He received the UC Davis Law School Medal for the highest academic achievement in his graduating class, as well as seven Witkin awards for the highest academic achievement in specific subjects. David received his B.A. in political science with honors from UC Santa Barbara.

Rankings

Named to “40 & Under – West” List in Dispute Resolution

Benchmark Litigation USA 2025