Martina Castrén

Associate, Brussels



Martina is a member of the Firm's EU law practice in Brussels and advises clients on all aspects of European and Finnish competition law.

Prior to joining White & Case in 2019, Martina worked for the Finnish Competition and Consumer Authority, where her work covered antitrust investigations and merger control in a broad range of industries, including financial services, construction, daily consumer goods retail and agriculture.

In addition to the public enforcement of competition law, Martina has in-depth experience in legislative work: she has been a member of working groups preparing the reform of the Finnish competition rules and the national health care system.

Martina holds a Master of Laws degree from Harvard Law School and the University of Helsinki, where she is pursuing a doctorate. Martina regularly publishes in the field of competition law and policy.

Harvard Law School

Fulbright Scholar

University of Helsinki
Economics and Business Administration
Hanken School of Economics
Postgraduate Diploma
Economics for Competition Law
King's College London



"Economic Assessment of the Competitive Effects of Mergers in Bidding Markets", Defensor Legis 2019 (3), 373–391 (in Finnish, co-authors Riku Buri and Lauri Ojala)

"The Forthcoming Amendments of the Finnish Competition Act", in Kilpailuvirastosta markkinavirastoksi – Juhani Jokisen juhlakirja (From a Competition Authority to a Market Authority: The changing role of the FCCA – Book in honour of Juhani Jokinen), (ed. Martina Castrén), 2018 (in Finnish)

"Finnish Competition Act under Reform: Working Group Issues a Report Suggesting Several Amendments", European Competition Law Review, 2017 38(9), 407–409

Report by the Working Group Assessing the Rules of Competition in Social Welfare and Health Care, Reports by the Ministry of Economic Affairs and Employment, 30/2017 (in Finnish)

Report by the Working Group Reforming the Finnish Competition Act, Reports by the Ministry of Economic Affairs and Employment, 16/2017 (in Finnish)

"Commitment Decisions in the Enforcement of Competition Law in Finland", Defensor Legis 2017 (2), 250–272 (in Finnish)

"Directive on Antitrust Damages Actions – Towards Effective Private Enforcement of EU Competition Law", Defensor Legis 2015 (2), 381–398 (in Finnish, co-author Harri Puskala)

"The Admissibility of Modifications of Public Procurement Contracts", Defensor Legis 2014 (3), 448–464 (in Finnish)