Barbara Borden


I am passionate about helping clients execute on their strategic objectives and love negotiating deals.

+1 858 550 6064

Barbara Borden is co-chair of Cooley's M&A practice. She focuses on M&A, cross-border transactions, joint ventures and other complex transactions, and public securities law. Barbara represents strategic and financial buyers and sellers in public and private acquisitions and also has significant experience in counseling boards of directors in connection with M&A and related governance and anti-takeover matters.

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  • Synthorx to Sell to Sanofi for $2.5 Billion 

  • Avedro Sells to Glaukos 

  • Arlo to Partner with Verisure 

  • Jazz Pharmaceuticals Acquisition of Redx Pharma's pan-RAF Inhibitor Program Valued up to $206 Million 

  • SendGrid Sells to Twilio for $2 Billion 

  • View all


  • Arizona State University School of Law
    JD, magna cum laude, Order of the Coif, 1984

  • University of Virginia
    BA, Government
    with high distinction, 1981

Admissions & Credentials



  • American Bar Association

  • San Diego County Bar Association

Rankings & Accolades

    Best Lawyers in America: Lawyer of the Year (2018)

    Daily Journal: Top Women Lawyers (2017)

    Legal 500 US: Leading Lawyer in M&A/corporate and commercial – M&A (2018)

    The Recorder: Trusted Advisor for Life Sciences (2016)

    Daily Journal: Top 100 Lawyers in California (2014-2017)

    The Recorder: Women Leaders in Tech Law (2015-2018)

    San Diego M&A Advisor of the Year: Buy-Side Transaction (2015)

    The Best Lawyers in America: Lawyer of the Year, San Diego Securities and Capital markets (2014)

    Legal 500 US: Mergers, Acquisitions and Buyouts for Large Deals (2011-2018)

    Chambers USA: Corporate/Mergers and Acquisitions (2011-2014)

    The Best Lawyers in America: Corporate Governance and Compliance Law, Corporate Law, M&A, Securities Regulation and Securities/Capital Markets Law (2010-2019)

    Super Lawyers: Mergers and Acquisitions (2007-2019)

M&A Blog

Dynamic thought leadership and newsworthy developments in the global mergers and acquisitions space

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+1 858 550 6064 office
+1 858 550 6420 fax

4401 Eastgate Mall
San Diego, CA 92121-1909