Sonya Erickson, Partner

Sonya F. Erickson is a partner in Cooley's Emerging Companies and Life Sciences practice groups and a member of the firm's Business department. She joined the firm in 2008 and is resident in the Seattle office.

Sonya has over 25 years of experience counseling emerging growth companies, established technology businesses and venture capital funds. Her clients range from early stage startups to larger public companies.

Sonya advises clients on a variety of legal and business issues. Her particular expertise is in private and public financing, strategic technology transactions and mergers and acquisitions. She represents companies and investors in private financings, strategic investments, spin-outs and public offerings.

Sonya is counsel to public and private companies in a broad range of industries, with a focus on the software, mobile, biotechnology and medical products and services industries. In the last 10 years alone, Sonya has worked on more than 300 venture capital transactions, closed public offerings of over $3 billion in equity and M&A transactions valued at more than $3 billion.

Prior to joining Cooley, Sonya was a shareholder at Heller Ehrman and a director and one of the founding members of the Seattle, WA office of Venture Law Group (VLG) before the merger with Heller Ehrman. Prior to that, Sonya was an associate at VLG in Menlo Park, Brobeck, Phleger & Harrison in Palo Alto and Jones Day in Los Angeles. 

Sonya is listed in The Best Lawyers in America in the category of Venture Capital Law from 2004 - 2015, is listed as a leading attorney in Chambers USA: America's Leading Lawyers for Business from 2013 - 2015, and listed in Washington Super Lawyers from 2014 to 2016.

Sonya earned her J.D. from the University of Washington School of Law after graduating with honors with a B.S. in Business and Economics from Pepperdine University. Sonya is admitted to practice in Washington State and is a member of the Washington State Bar Association.


  • University of Washington School of Law
    JD, 1990
  • Pepperdine University
    BS Business and Economics, 1987, With honors

Bar Admissions

  • California
  • Washington


  • Washington State Bar Association

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