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Jacquelyn MacLennan

Jacquelyn MacLennan
62 rue de la Loi / Wetstraat 62
+32 2 219 16 20
+32 2 219 16 26


Who's Who Legal Competition: Lawyers

Jacquelyn MacLennan offers a wealth of competition law experience for clients worldwide, representing leading multinational corporations, governments and trade associations.

Jacquelyn has been involved in litigation since the start of her career with Shepherd & Wedderburn in Edinburgh. She then worked in the legal service of the European Commission, where she was involved in groundbreaking cases such as Stanley Adams (corporate and individual ethics) and Woodpulp (concerted practices).

In 1986 she joined the boutique law firm Forrester Norall & Sutton (which merged with White & Case in 1998), where the main focus of her practice involved cases concerning general principles of EU law (Pfizer) and competition cases. She has been a partner at White & Case since 1998.

Her clients benefit from her experience and insight in developing strategy and running major international cartel investigations, as well as advising on complex distribution problems and licensing arrangements, abuse of dominance cases, mergers and joint ventures.

With an impressive track record of experience and know-how, Jacquelyn litigates regularly before the EU and UK courts, and represents clients before the European Commission. Her recent high-profile work for Toshiba has included multi-jurisdictional proceedings concerning gas insulated switchgear. This involved a successful appeal of the original European Commission decision fining Toshiba €90.9 million for participating in a global cartel to the European General Court – where the Court annulled in full the fine on Toshiba – and a further appeal to the Court of Justice of the EU. Her work for Toshiba also led to a seminal preliminary ruling to the European Court of Justice, which established the principles governing the scope for parallel proceedings by national competition authorities and the European Commission. She has also represented the company in an appeal to the European General Court of the Commission decision in Cathode Ray Tubes (CRT), used for TVs and computer monitors, regarding fundamental principles of EU jurisdiction in competition law; and an appeal which went as far as the Court of Justice of the EU against a Commission decision finding a home market protection agreement in Power Transformers.

Jacquelyn regularly teaches courses on EU competition law and frequently speaks at conferences on her subjects of expertise.

She has for many years been named a leading lawyer in competition/antitrust: EU law by Chambers Europe and Chambers Global, and in 2012 received a writing award from the Institute of Competition Law.

Jacquelyn holds an LLB with honours and a diploma in legal practice from the University of Edinburgh. She is a solicitor of Scotland and member of the Brussels Bar (E list), as well as a member of Chatham House and an Honorary Fellow of the European Institute, University of Edinburgh.

Jacquelyn has accumulated substantial management experience over her career. She is currently a member of the partnership committee (the main governance body) of White & Case, and a former member of the executive committee (responsible for the firm's strategy) and executive partner heading the Brussels office. In October 2015, she became the global pro bono practice leader.

WWL says: Jacquelyn MacLennan is "top-drawer for all types of EU regulatory law"

This biography is an extract from Who's Who Legal: Competition which can be purchased from our Shop.

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Law Business Research Ltd

87 Lancaster Road, London
W11 1QQ, UK