Douglas N. Cogen

Co-Chair, Mergers & Acquisitions

Partner, Corporate  

San Francisco 415.875.2409


Doug Cogen concentrates his practice on mergers and acquisitions, strategic and commercial transactions, corporate counseling and financings. His practice also includes advising publicly traded and privately held companies with respect to corporate, securities, commercial and intellectual property licensing matters generally. He serves as a member of the firm's Executive Committee.

Doug's transactional experience includes over $100 billion of completed mergers, acquisitions and divestitures including cross-border transactions in the networking, software, life sciences, medical devices, telecommunications, semiconductor, internet, computer hardware and consumer products industries; public company tender offers; and private placements of equity and debt securities. Doug also counsels companies on corporate governance matters, takeover defenses and strategic partnering arrangements.

Doug has been ranked by Chambers USA as a "Notable Practitioner" in Corporate Law/M&A in both the Nationwide-Highly Regarded and Northern California listings, which recognized him as a “strategically brilliant practitioner who understands public M&A” (2016) and “an incredible negotiator who sees the big picture” (2013) who uses “innovative, outside-the-box solutions” (2014), is “incredibly balanced” (2017) and “fair and easy to deal with” (2013).

Doug's technology transactions include:

  • Over 100 deals for Cisco Systems, including the acquisitions of:
    • Scientific-Atlanta for $6.9 billion
    • NDS Group for $5 billion
    • AppDynamics for $3.7 billion​
    • WebEx Communications for $3.2 billion
    • Starent Networks for $2.9 billion
    • Sourcefire for $2.7 billion
  • Multiple deals for Symantec, including:
    • ​Sale of the Veritas information management business to The Carlyle Group for $7.4 billion
    • Merger with Blue Coat for $4.65 billion
    • Acquisition of LifeLock for $2.3 billion
    • Sale of the website security solutions business to DigiCert
  • VeriSign's $21 billion merger with Network Solutions
  • Concur’s $8.3 billion acquisition by SAP
  • Excite's $7.2 billion merger with @Home Corporation
  • NetScreen Technologies' $4.3 billion merger with Juniper Networks
  • Macromedia's $3.4 billion merger with Adobe Systems
  • Elantec Semiconductor's $1.4 billion acquisition by Intersil Corporation

Doug's life sciences transactions include:

  • Cepheid’s $4 billion acquisition by Danaher Corporation​
  • Agilent Technologies’ $1.5 billion acquisition of Varian
  • Connetics' $930 million merger with Stiefel Laboratories
  • Vysis’ $365 million acquisition by Abbott Laboratories
  • Peplin’s $287.5 million acquisition by LEO Pharma
  • Agilent Technologies’ $250 million acquisition of Stratagene

Doug’s awards and recognitions include:

  • ranked one of the Top 100 Attorneys in the State of California by Los Angeles Daily Journal and San Francisco Daily Journal twice (2013 and 2006)
  • named Finance Monthly's Deal Maker of the Year in both 2015 and 2017
  • named one of the Top 50 Global M&A Lawyers by Global M&A Network in 2014
  • named by The Legal 500 as a "Leading Lawyer" in the United States - M&A/Corporate in each of the last four years
  • awarded “M&A Lawyer of the Year” by Global M&A Network in 2010
  • named one of the Best Lawyers in America in Mergers & Acquisitions Law by Best Lawyers
  • named Northern California “Super Lawyer” in each of the last ten years by Law & Politics and San Francisco magazines
  • named one of the Best Lawyers in the Bay Area by Bay Area Lawyer magazine
  • named Top Dealmaker-Lawyer by AlwaysOn and KPMG
  • named one of the 500 Leading Dealmakers in the United States by Lawdragon

Doug received his B.A., magna cum laude, with Academic Honors, in architecture and society from Brown University, where he was elected Phi Beta Kappa. He attended the University of Michigan Law School, receiving his J.D. cum laude. Doug has also served as Director of Intergovernmental Relations for the New York City Planning Commission. Doug has lectured on transactional law at Columbia University Law School, Stanford University Law School and the Stanford Graduate School of Business. He is a member of the state bars of California and New York.​​​