William Kolasky is a partner in the Washington, D.C. office of Hughes Hubbard. He has nearly 40 years of experience across the full range of antitrust litigation and counseling. Mr. Kolasky regularly represents clients in antitrust litigation before courts all over the country. He also represents clients in criminal and civil investigations before both the Antitrust Division and the Federal Trade Commission. He has secured antitrust clearance from the two agencies for more than 100 mergers and acquisitions, and has coordinated merger reviews in multiple other jurisdictions around the world. He also regularly counsels clients about antitrust aspects of a wide variety of business arrangements from joint ventures to distribution arrangements. In 2013, he received the Global Competition Review’s Lifetime Achievement Award for his accomplishments in private practice, government service, and antitrust scholarship. Mr. Kolasky served as Deputy Assistant Attorney General in the Antitrust Division of the US Department of Justice. While there, he was one of the architects of the International Competition Network, a network of over 100 competition authorities worldwide designed to promote great international cooperation and convergence among those authorities. He has also taught antitrust law for over ten years at the American University’s Washington College of Law. Mr. Kolasky publishes and speaks regularly on antitrust law subjects in both the United States and Europe. He has taught antitrust law at the American University’s Washington College of Law. Mr. Kolasky has been active in the Section on Antitrust Law of the American Bar Association for many years and currently serves as an Associate Editor for their Antitrust Magazine.​

2020 Awards


Nominee, 2020 Antitrust Writing Awards: Academic, General Antitrust

Nominee, 2013 Antitrust Writing Awards: Academic, General Antitrust

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