Kenneth Guernsey


Every board and management team can use a good consigliere. That’s where I try to add value.

+1 415 693 2091

Kenn Guernsey works with public and private companies, investment banks and venture capital investors, serving as a trusted advisor and legal team leader for companies and professionals in a wide range of industries. Kenn has served as counsel to numerous companies that have pioneered new industries or business models or led their industries, including Genentech, eBay, Yelp, Medivation, Jawbone, Zynga, Gilead Sciences, Wired, Hambrecht & Quist, Peet's Coffee & Tea, LeapFrog, Metricom, Quokka Sports, Raychem and Atari. He has practiced with Cooley since 1978 – except for a five-year period during which he served as general counsel and venture capital COO with Hambrecht & Quist (now JP Morgan) – and served as Cooley's chief executive from 1990 to 1996.

Download full bio


  • Satsuma Pharmaceuticals – $83 Million IPO  

  • NGM Biopharmaceuticals - $107 Million IPO 

  • Criteo $230 Million Follow-On 

  • Medivation Agrees to Sell to Pfizer for $14 Billion 

  • Jawbone Acquisition of Body Media 

  • View all


  • University of California, Los Angeles School of Law
    JD, 1978

  • University of California, Los Angeles
    MBA, Finance
    Beta Gamma Sigma, 1978

  • University of California, Los Angeles
    BS, Mathematics
    cum laude, 1974

Admissions & Credentials



  • The Bar Association of San Francisco


+1 415 693 2091 office
+1 415 693 2222 fax

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

Other Offices