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Band 2
Provided by Mark Simpson
Mark Simpson is a competition litigator who advises multinational clients on high-stakes antitrust matters, including complex investigations, follow-on damages claims, and class actions.
Mark represents clients in litigation before the English High Court and the UK Competition Appeal Tribunal (CAT) as well as proceedings before the UK Competition and Markets Authority (CMA), the European Commission and other global regulators. His practice focuses on defending cartel and abuse of dominance allegations, including some of the most significant collective actions and group litigation currently before the English courts.
He has extensive experience handling cross-border competition investigations and associated civil litigation, and is regularly involved in judicial review and appellate proceedings challenging regulatory decisions before UK and EU courts. Mark also advises on internal investigations, compliance, and crisis management, helping clients navigate regulatory risk and respond to enforcement action in a coordinated, strategic and commercially focused manner.
Provided by Chambers
Mark Simpson has a strong contentious practice, defending clients in high-profile collective proceedings and follow-on damages actions. He is a particularly popular choice with clients from the financial services sector. Mark Simpson joined Covington & Burling in June 2026.
Provided by Chambers
Mark Simpson is very commercial, very sharp and very quick.
Mark Simpson is a fantastic client partner; he's really good at building a rapport with clients and making them feel like he’s on their side.
Mark Simpson is absolutely excellent. He is a really good litigator and is good to work with.
Mark is very experienced and client-centric. He is a pleasure to work with.
Mark Simpson is hugely collaborative and that makes him a more effective lawyer. He brings together all the different elements and issues in a way that allows him to be very impactful.
Mark Simpson is very commercial, very sharp and very quick.
Mark Simpson is a fantastic client partner; he's really good at building a rapport with clients and making them feel like he’s on their side.
Mark Simpson is absolutely excellent. He is a really good litigator and is good to work with.
Mark is very experienced and client-centric. He is a pleasure to work with.
Mark Simpson is hugely collaborative and that makes him a more effective lawyer. He brings together all the different elements and issues in a way that allows him to be very impactful.