William (Billy) Vigdor came to Vinson & Elkins from the Federal Trade Commission (FTC) in 2003. He assists clients in identifying and managing the antitrust and national security risk of global mergers and joint ventures.
Billy provides substantive and strategic antitrust risk assessments in a wide array of industries and transaction structures (mergers, acquisitions, and joint ventures) and represents clients before the FTC, Department of Justice, and states attorneys general. He assists private
equity, hedge funds, portfolio and public companies in addressing global merger control issues and in assessing risks. Billy also represents clients before the Committee on Foreign Investment in the United States (CFIUS).
Billy represents clients in some of the most complex mergers and acquisitions, joint ventures, partial ownerships, and government investigations involving price-fixing and monopolistic practices, as well as multijurisdictional merger control. He works
with a wide range of clients, including hedge funds, master limited partnerships, and private equity firms.His antitrust work covers most of the economy, including energy (from well to burner tip or gas tank), petrochemicals, health care, technology,
aerospace, telecommunications equipment, auto parts, retailing, food manufacturing, and pharmaceuticals. Billy has experience
seeking agencies’ approval not to challenge mergers and not to issue second
Since 1995, Billy has represented clients—buyers, sellers, and privately and government-owned—in multibillion dollar transactions before CFIUS, including companies involved in energy, technology, telecommunications, petrochemicals, satellites, real estate, and other industries. He has assisted clients in
negotiating FOCI mitigation agreements with CFIUS agencies.