O’Melveny Worldwide

Warren Lazarow is nationally and internationally recognized as one of the market’s leading advisors to technology companies and investors.

Named four times to Forbes Magazine’s prestigious “Midas List” of the technology industry’s top dealmakers worldwide, Warren is a boardroom-level corporate lawyer who helps founders, management teams, boards of directors, and investors shape and execute business strategies that drive the growth of innovative companies. He provides experienced counsel on legal and business issues ranging from day-to-day corporate, commercial, and regulatory matters to high-stakes strategic initiatives.

Over the course of his more than 35 years in practice, Warren has guided hundreds of technology companies to success. Many of these are among the industry’s best-known companies, attaining valuations in the billions of dollars.

Warren has led more than 200 M&A transactions; more than 100 public offerings of equity, debt, or convertible securities; and more than 1,000 venture capital, growth capital, and private equity financings.

He is recognized nationally and internationally as a leading corporate and emerging companies lawyer, and has spoken on issues impacting technology companies before audiences in the US, Japan, China, Singapore, Indonesia, Korea, Taiwan, Israel, and Europe. Chambers describes him as “particularly known for his representation of technology companies in the emerging companies space,” and notes he is “praised for his practical and intelligent advice.” Legal 500 calls him “highly recommended by clients in the technology space for his truly significant experience,” and “the key person in the technology industry for all manner of corporate legal issues.”

Warren is a member of O’Melveny’s Executive Committee. From 2010 to 2017, he served as Chair of the firm’s Global Corporate Department, and from 2017 to 2021 as Co-Chair, marking more than a decade of leadership in total.

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  • Analogix Semiconductor in its US$500 million acquisition by a consortium led by Beijing Shanhai Capital Management;
  • AutoGrid Systems in corporate counseling, including multiple venture capital financings and its acquisition by Schneider Electric;
  • CA Technologies in its acquisition of Espresso Logic, its US$42 million acquisition of Nolio, and its US$614 million acquisition of Veracode;
  • Credence Systems in its US$304 million initial public offering and several follow-on offerings;
  • Dome9 Security in corporate counseling, including multiple venture capital financings and its US$175 million acquisition by Check Point Software;
  • Electronics For Imaging in corporate counseling, more than a dozen acquisitions, and its US$1.7 billion acquisition by Siris Capital Group;
  • Lantronix in corporate counseling, multiple public offerings, and its acquisitions of Net2Edge and Transition Networks from Communications Systems;
  • Menlo Microsystems in corporate counseling, including its US$150 million Series C financing;
  • Microsemi Corporation in corporate counseling, more than two-dozen acquisitions—including its US$430 million acquisition of Actel Corporation, its US$245 million acquisition of PowerDsine, its US$2.5 billion acquisition of PMC-Sierra, its US$230 million acquisition of Symmetricom, its US$389 million acquisition of Vitesse Semiconductor, its US$100 million acquisition of White Electronic Designs Corporation, and its US$600 million hostile acquisition of Zarlink Semiconductor—and its US$10.3 billion acquisition by Microchip Technology;
  • Quantenna Communications in its US$1.07 billion acquisition by ON Semiconductor;
  • SMART Global in corporate counseling, including its acquisitions of Artesyn Embedded Computing, Inforce Computing, and the LED products business of CREE;
  • SolarEdge Technologies in corporate counseling, multiple venture capital financings, and its US$145 million initial public offering and US$590 million follow-on offering;
  • Strava in corporate counseling, including multiple acquisitions and its US$110 million Series F financing;
  • Synopsys in its initial public offering, public company counseling, and numerous acquisitions and investments;
  • Ultratech in corporate counseling, including its initial public offering and its US$815 million acquisition by Veeco Instruments; and
  • VMware in its acquisition of Heptio for a reported US$550 million.


  • French
  • Hebrew


Bar Admissions

  • California
  • New York


  • Brooklyn Law School, J.D., 1986: Notes Editor, Brooklyn Law Review; American Jurisprudence Award in Civil Procedure; Morris Scholarship
  • Princeton University, Princeton School of Public and International Affairs, A.B., 1982: cum laude

Honors & Awards


  • Brooklyn Law School Annual Alumni Association, Co-Alumni of the Year Award, 2008

Professional Recognition

  • Recognized by Best Lawyers® for Venture Capital Law in Menlo Park, CA (2022-2023); Warren has been listed in Best Lawyers® since 2012
  • Recognized by IFLR1000® (2019 - 2022) as a Notable Practitioner in Technology & Telecommunications and Private Equity
  • Named by The Legal 500 US to its list of “Recommended Lawyers” (2008-2020)
  • Ranked on the ICFM list of top 500 leading lawyers in the world (2015)
  • Named by California Law Business to its list of “California’s Top 25 Lawyers Under the Age of 45”
  • Named by San Jose Magazine to its list of “Top Lawyers in the Silicon Valley”
  • Named by Global Counsel to its list of “Highly Recommended Lawyers for Private Equity/Venture Capital”
  • Named by Madison Who’s Who Among Executives and Professionals to its “Honors Edition”

Professional Activities


  • American Bar Association
  • New York State Bar Association
  • California Bar Association

Board of Directors

  • Audiowear Technology Corporation

Board of Governors

  • University Cottage Club, Princeton University


  • “The SEC’s Regulation of the Financial Press: The Legal and Constitutional Implications of the Misappropriation Theory,” Brooklyn Law Review
  • “Technology M&A Case Strategies: Acquisition of Clear Shape Technologies by Cadence Design Systems,” Aspatore Books