John Hardiman has practiced in Sullivan & Cromwell’s litigation department for almost 40 years, handling a wide array of litigation, arbitration, and regulatory matters. Mr. Hardiman is the Firm’s senior litigator in the corporate governance and mergers and acquisitions areas, having worked on many high stakes contests for corporate control. He also has extensive experience handling regulatory investigations for the Firm’s broker-dealer and corporate clients, as well as standard commercial litigation and bankruptcy matters.
From 2005–2010, Mr. Hardiman was resident in the Firm’s London office, where he added to his practice expertise in international arbitration and the Foreign Corrupt Practices Act.
Mr. Hardiman has been recognized as a leading lawyer in securities and commercial litigation by Chambers USA, New York Super Lawyers and The Best Lawyers in America. He has been recognized in international litigation and arbitration as one of the "500 Leading Global Litigators" by Lawdragon. In 2021, he was recognized by Sports Business Journal’s Power Players: Outside Counsel.
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