Henry Thumann

O'Melveny & Myers LLP

$ $$$

Washington 20006 DC US

Henry C. Thumann devotes his practice to high-stakes antitrust matters. He has spent a significant amount of time defending mergers and acquisitions before the U.S. antitrust agencies—the Federal Trade Commission (FTC) and the Department of Justice (DOJ)—for clients in an array of industries, including defense, healthcare, computer, supermarket, food products, gaming, and manufacturing.


  • California
  • District of Columbia


  • Harvard Law School, LL.B., 1960: magna cum laude; Law Review, (1958-1960)
  • University of Illinois, B.S., 1957


  • Ninth Circuit Judicial Council Committee on Evaluation of Judges and Lawyers (1985-2005)
  • Center For Public Resources Antitrust Committee (1986-present)
  • Ninth Circuit Judicial Conference (1982-85), (executive committee (1984 85))
  • Executive Committee, Antitrust Section, Los Angeles County Bar Association (1989-present)


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Washington 20006 DC US
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