Maria Wasastjerna

Partner | Helsinki

Maria Wasastjerna has extensive experience in competition law and regulatory matters. She advises Finnish and international companies on all aspects of competition law, specialising in regulatory legal and compliance matters, as well as in competition litigation and M&A transactions.

Prior to returning to private practice and joining Hannes Snellman, Maria gained several years of experience as an in-house lawyer in global corporations. Maria regularly publishes articles, presents at conferences, and lectures on competition, compliance, and technology-related topics.

Maria can identify the essential and solve problems with a very strong business mindset. In addition, she is extremely nice to work with.

EU & Competition | Legal 500, 2020



Valmet Oyj (Buyer), Solidium Oyj (Seller)


Counsel to Valmet Oyj in the acquisition of future Neles Corporation from Solidium Oy, representing 14.88% of all Neles’ shares and votes. 

Deal Value

EUR 179 million


Counsel to Valmet Oyj


Johan Aalto, Lauri Marjamäki, Anna Sahrakorpi, Maria Wasastjerna

Johan Aalto

Johan Aalto

Partner | Helsinki
Lauri Marjamäki

Lauri Marjamäki

Associate | Helsinki
Anna Sahrakorpi

Anna Sahrakorpi

Associate | Helsinki
Maria Wasastjerna

Maria Wasastjerna

Partner | Helsinki


  • 'Maria Wasastjerna has a unique combination of academic knowledge with extensive global practical experience from a multinational. Maria can identify the essential and solve problems with a very strong business mindset. In addition, she is extremely nice to work with.', EU and Competition, Legal 500, 2020
  • Elected as one of the ’30 in their 30s’ Notable Women in Competition in Europe, 2017
  • Victoriastiftelsen Scholarship, 2017
  • Fulbright-Schuman Scholarship, 2011

Memberships and Positions of Trust

  • American Chamber of Commerce in Finland Legal Committee, Chair 2015−2016, Vice Chair 2014
  • Member of the Board, Fulbright Organization in Finland, 2015
  • Member of the New York Bar, 2013−
  • Member of the Finnish Bar Association, 2013, 2019−
  • Member of W@Competition


  • EU competition policy for the digital age, Columbia Journal of European Law 24/2019 (forthcoming)
  • Blurred Lines: The German Facebook case, Finnish Competition Law Yearbook 2019
  • The Controversial Competition-Data Protection Interface, European Business Law Review 30/2019
  • The role of big data and privacy in merger review, European Competition Journal 14/2018
  • Konkurrensrätt, data och integritetsskydd, Juridiska Föreningen i Finland JFT 5/2018
  • Parental liability in EU competition law, International In-House Counsel Journal 8/2015
  • Interlocking directorates in EU competition law, Europarättslig Tidskrift 4/2012
  • Vähemmistöomistusten kilpailuoikeudellisesta merkityksestä, Defensor Legis 3/2012 (co-authored)
  • Antitrust review of intellectual property in the US and the EU, ICC Global Antitrust Review 2011
  • Predatory pricing in antitrust enforcement, ABA Antitrust Law Section Pricing Newsletter Fall 2011
  • Recent developments in resale price maintenance treatment, The Price Point, Spring 2011 (co-author)
  • Private enforcement of Finnish competition law, Juristklubben Codex Festschrift 2010
  • Yhdenmukaistettu menettelytapa ja tietojenvaihto, Defensor Legis 4/2009 (co-author)
  • Gaming in Norway - Did the EFTA court get it right? Competition Law Insight 7/2007 (co-author)

Education and Professional Background

  • Partner, Hannes Snellman, 2019
  • Lead Counsel Competition Law / Senior Legal Counsel, Nokia Corporation, 2014−2019
  • Head of Legal, Kiosked Ltd, 2013–2014
  • Secondee Lawyer, Nokia Corporation, 2013
  • Secondee Lawyer, GE Healthcare, 2012
  • Senior Associate / Associate, Roschier Attorneys, 2008–2013
  • International Trainee, U.S. Federal Trade Commission, Washington D.C., 2011
  • Stagiaire, European Commission, Brussels, 2008
  • Stagiaire, Cleary Gottlieb Steen & Hamilton, Brussels, 2007
  • Doctor of Laws, University of Helsinki, 2019
  • Visiting Academic, University of Oxford, 2018
  • LL.M., Fulbright scholar, Georgetown Law School, 2011
  • LL.M., College of Europe, Belgium, 2008
  • Master of Laws, University of Helsinki, 2006

Recent Speaking Engagements

  • EU Merger Control Conference 2019, Brussels, May 2019
  • Finnish Competition Law Association, Helsinki, Apr 2019
  • Juristi 2.0: Miten pärjätä juristikoulutuksesta huolimatta? University of Helsinki, Apr 2019
  • Algorithms and the data economy, Fondia Academy, Helsinki, Mar 2019
  • Competition Law Nordic Conference, Stockholm, Jan 2019
  • Antitrust and competition compliance in CEE Conference, Prague, Dec 2018
  • Big data and competition law KNect 356 Conference, Brussels, Oct 2018
  • W@Competition Nordic Conference, Vilnius, Oct 2018
  • Future of Europe Young Researchers Symposium, University of Helsinki, May 2018
  • Antitrust Law and Economics CLaSF Workshop, University of Graz, Apr 2018
  • Competition Law Nordic Conference, Stockholm, Feb 2018
  • International Technology Law Association Europe Conference, Stockholm, Oct 2017
  • Competition law for the digital economy, ASCOLA Conference, Stockholm, June 2017
  • Advanced Competition Law Conference, London, May 2017
  • Privacy in the 21st Century Seminar, IAPP and University of Helsinki, May 2017
  • Competition Law Nordic Conference, Stockholm, Feb 2017