Cydney Posner

Special Counsel

+1 415 693 2132

Cydney S. Posner is special counsel in Cooley's public companies group. Her practice concentrates on corporate counseling in connection with SEC reporting and compliance, corporate governance and general corporate matters. She has also represented both issuers and underwriters in numerous public offerings primarily for emerging growth companies, including companies in the internet and high technology, life sciences and consumer retail sectors. In addition, she has represented companies in mergers, tender offers and other change-of-control transactions, going-private transactions and private placements.

Download full bio


  • Medivation Agrees to Sell to Pfizer for $14 Billion 

  • DreamWorks Animation in Acquisition of AwesomenessTV 

Practices & Industries


  • University of California, Hastings College of the Law
    JD, cum laude

  • University of California, Berkeley
    BA, Phi Beta Kappa, with great distinction

Admissions & Credentials



  • The Bar Association of San Francisco

  • State Bar of California


+1 415 693 2132 office
+1 415 693 2222 fax

101 California Street
5th Floor
San Francisco, CA 94111-5800