LAWYER PROFILE
Patrick Harrison

Patrick Harrison

Europe 2026

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Ranked in 1 practice area

About

Provided by Sidley Austin LLP

Practice Areas

PATRICK J. HARRISON advises on all aspects of EU and UK competition law. Patrick spent four years in Brussels before relocating to Sidley’s London office in 2007 and is admitted both as a Solicitor in England and Wales and as an Advocaat in Belgium. He has significant experience representing clients before the European Commission and the UK’s Competition and Markets Authority (CMA), securing favorable results for clients requiring regulatory approvals, or facing regulatory challenges.

Patrick focuses his practice on merger control, cartel and dominance investigations, counselling, and compliance. He has also represented clients in EU and UK judicial review proceedings regarding both competition cases and legislation of broader application. In this context, he has pleaded a number of cases before the EU Courts.

Chambers Review

Provided by Chambers

Chambers European Guide

Competition Law - UK

Band 5
Band 5

Individual Editorial

Patrick Harrison has particular experience advising clients on foreign direct investment filings before the CMA. He offers additional experience acting on CMA merger reviews.

Strengths

Provided by Chambers

  • He has very good business understanding, explains concepts well and is quick to understand our business.

    Competition LawChambers European Guide
  • Patrick Harrison is an excellent partner for UK competition matters.

    Competition LawChambers European Guide
  • He is our go-to resource for any complex competition questions.

    Competition LawChambers European Guide
  • Patrick Harrison is a very commercially-minded regulatory advisor and is extremely creative in his problem solving, for what are fairly complex and novel legal queries.

    Competition LawChambers European Guide
  • Whenever there is a messy competition matter, he's the guru we rely on.

    Competition LawChambers European Guide

Ranked Individuals at Sidley Austin LLP (30)

Belgium

Europe-wide

Netherlands

  • Profile image of Maarten Meulenbelt
    Maarten Meulenbelt

    Competition/European Law: Lawyers Based Abroad

    View profile

Switzerland

UK

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