Drew Williamson


+1 415 693 2199

Andrew (Drew) Williamson is a partner in the capital markets practice group, vice chair of Cooley's business department, member of the firm's management committee and resident in the San Francisco office. Drew's practice centers on public and private securities offerings, mergers and acquisitions and general corporate representation of public and private companies. He has represented public and private companies, investment banks, private equity and venture capital firms in the software, internet, life sciences, semiconductor, cleantech, telecommunications, manufacturing, retail and distribution industries.

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  • Livongo Health - $409 Million IPO 

  • Health Catalyst - $209 Million IPO 

  • Uber Technologies $8.1 Billion IPO 

  • Principia Biopharma – $122 Million IPO 

  • Gritstone Oncology – $100 Million IPO 

  • View all


  • Georgetown University Law Center
    JD, cum laude, 1997

  • Harvard University
    AB, Chemistry
    cum laude, 1994

Admissions & Credentials


Rankings & Accolades

    Daily Journal: 2020 California Lawyer Attorneys of the Year 

    Chambers USA: Capital Markets: Debt & Equity (California) and (Western United States – Nationwide)


+1 415 693 2199 office
+1 415 693 2222 fax

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