Henry Mostyn is a partner based in the London office of Cleary Gottlieb Steen & Hamilton. His practice focuses on EU and UK competition law, including merger control, anticompetitive agreements, and abuse of dominance rules. He has represented clients before the European Commission and the UK Competition and Markets Authority, as well as litigation before the European Courts in Luxembourg and the UK High Court. His particular focus is on the application of the abuse of dominance rules to the technology sector. Mr. Mostyn joined the firm in 2012. In 2011, he completed pupillage at 4 New Square Chambers, Lincoln’s Inn. As an undergraduate he read Mathematics at Pembroke College, Oxford. During 2017, Henry worked at the UK Competition and Markets Authority in the mergers team. He completed the Graduate Diploma in Law at BPP Law School, where he achieved a Commendation. Mr. Mostyn is a member of the Bar in England and Wales. His native language is English.

2023 Awards

2020 Awards


Nominee, 2020 Antitrust Writing Awards: Academic, Mergers

Nominee, 2016 Antitrust Writing Awards: Business, General Antitrust

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