Mark Sansom
UK Guide 2025
Band 1 : Competition Law: Litigation
Email address
[email protected]Contact number
020 7936 4000Share profile
Band 1
About
Provided by Mark Sansom
Practice Areas
Mark is a market-leading competition litigator with an unsurpassed track record of defending competition damages claims, including collective proceedings. He has represented clients in many of the most important and highest-profile competition damages litigation cases and collective proceedings in the UK Competition Appeal Tribunal, High Court and appeal courts, including acting for the defendants in Merricks v Mastercard, Gutmann v LSER & GTR, Gemalto v Infineon and BritNed v ABB. He frequently coordinates competition litigation and investigations globally and has been recognised internationally as a leading antitrust litigator and thought leader.
Career
Mark joined Freshfields in 1999. He became a partner in 2011. He previously led Freshfields’ London competition litigation team and London Dispute Resolution practice, and is now, alongside fully maintaining his practice, Managing Partner of the firm’s London and Dublin offices.
Chambers Review
UK
Mark Sansom stands out for his representation of defendants in high-profile follow-on damages claims, including acting on some of the most significant class actions currently before the CAT. He acts as the managing partner of the Freshfields London and Dublin offices.
Strengths
Provided by Chambers
"Mark Sansom is very unflappable, very experienced and has huge knowledge of this area."
"Mark Sansom has an enormous amount of expertise that he brings to bear excellently."
"I have never encountered a partner with the relentless energy, focus and good humour that he has."
"I think he has the incredible ability to grasp the key issues and give very sensible, constructive and clear advice to the client. His view on how things play out is extremely valuable."
"He is unrivalled; he is such a professional and has a huge brain. You know you are in good hands with him. He is so thoughtful."
"Mark Sansom is very unflappable, very experienced and has huge knowledge of this area."
"Mark Sansom has an enormous amount of expertise that he brings to bear excellently."
"I have never encountered a partner with the relentless energy, focus and good humour that he has."
"I think he has the incredible ability to grasp the key issues and give very sensible, constructive and clear advice to the client. His view on how things play out is extremely valuable."
"He is unrivalled; he is such a professional and has a huge brain. You know you are in good hands with him. He is so thoughtful."
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