Martina Castrén,
Partner Elect

martina.castren@krogerus.com
+358 (0)40 748 1832

Martina advises clients on all aspects of Finnish and European Union competition law. Martina has extensive international experience and has represented clients before the European Commission and Nordic Competition Authorities. Martina has also represented clients in cartel proceedings before the European Commission and regularly advises clients on the application of the abuse of dominance rules. 

Prior to joining Krogerus, Martina worked for a global law firm and for the Finnish Competition and Consumer Authority (FCCA). At the FCCA, her work covered landmark antitrust investigations and merger control across a broad range of industries, including financial services, construction, daily consumer goods retail and agriculture. 

Martina frequently advises domestic and international clients on foreign direct investment (FDI) and foreign subsidies regulation (FSR).

Prior Experience
Advising ABB on its acquisition of Netcontrol (2025).
Advising Triton on its acquisition of MacGregor (2025).
Advising Terveystalo on the public takeover offer for Medhelp AB by a consortium of Terveystalo and MH Sjukvårdsrådgivning Holding AB (2025).
Advising Projektengagemang Sweden AB on public takeover offer from Sweco Sverige AB (2025).
Advising Intera Partners on sale of Roima Intelligence (2024).
Advising Hartwall Capital on investment in Secto Automotive (2024).
Advising Vaaka Partners on sale of Cloudpermit (2024).
Advising Georg Fischer AG on its public takeover offer for Uponor (2023).
Advising Bregal Milestone and other shareholders on the sale of Epassi Group Oy (2023).
Advising Valmet on its acquisition of Körber's Business Area Tissue (2023).
Advising DNV AS on its public takeover offer for Nixu (2023).
Advising Nexans SA on its acquisition of Reka Cables (2022) and La Triveneta Cavi (2024).
Advising Synthos on the acquisition of Trinseo's synthetic rubber business (2021).
Advising Neste on the sale of global base oils business (2021).
Advising DIC Corporation and its US subsidiary Sun Chemical Corporation, in connection with DIC's acquisition of BASF's global pigments business (2020).
Advising Valmet on its acquisition of PMP Group (2020).
Publications
Keskon ja Heinon Tukun välisen yrityskaupan kieltäminen – riita markkinamäärittelystä päättyi KKV:n voittoon markkinaoikeudessa. Kilpailuoikeudellinen Vuosikirja 2019, Suomen Kilpailuoikeudellinen Yhdistys ry. (2020)
Yrityskaupan kilpailuvaikutusten arviointi tarjouskilpailumarkkinoilla – tarkastelussa YIT:n ja Lemminkäisen sulautuminen. Co-authors: Riku Buri and Lauri Ojala. Defensor Legis 2019/3 (2019)
Kilpailuvirastosta markkinavirastoksi – Juhani Jokisen juhlakirja (toim.) (2018)
Kilpailulain uudistamista koskevan työryhmän mietintö. Työ- ja elinkeinoministeriö, 16/2017 (2017)
Sitoumuspäätökset kilpailuoikeudellisena instrumenttina Suomessa. Defensor Legis, 2017/2 (2017)
Sosiaali- ja terveysalan kilpailusääntöjä arvioineen työryhmän raportti. Työ- ja elinkeinoministeriö 2017/30 (2017)
Kilpailuoikeudellinen vahingonkorvausdirektiivi – kohti EU:n kilpailuoikeuden harmonisoitua yksityisoikeudellista täytäntöönpanoa. Co-author: Harri Puskala. Defensor Legis 2/2015 (2015)
Hankintasopimusten muuttamisen sallittavuus. Defensor Legis 2014/3 (2014)
Education Background
LL.M., Harvard Law School (2019)
Master of Science (Econ.), Hanken School of Economics (2018)
Master of Laws, University of Helsinki (2013)
Post-Graduate Diploma in Economics for Competition Law, King’s College London (2016)
Memberships and Affiliations
Finnish Bar Association
Finnish Competition Law Association
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Practices
Competition & Regulatory
Languages
Finnish, English
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Legal assistant
Elina Koort