Sonny Gaarslev joined Kromann Reumert in 2012 and is part of Kromann Reumert's competition, State aid and European law group. Sonny advises on general competition law, cartel law, civil damages trials, merger control, State aid law and European law, the latter including the free movements.

In this context, Sonny has experience with handling an on-going, close cooperation with the relevant authorities, and is involved in investigations and trials before both the Danish authorities and courts as well as the European Commission and the European Court of Justice. Sonny has been involved in a number of significant international mergers and cartel cases and handles criminal proceedings before the State Prosecutor for Serious Economic and International Crime ("SØIK"), including leniency matters.

Sonny’s experience also includes comprehensive corporate internal investigations, legal compliance work and public law. Furthermore, Sonny has deep insight into the political system in general and specific experience with municipal politics, which often proves beneficial in State aid cases.

Finally, Sonny has experience with advising international banks and private equity funds on acquisition, sale and handling of distressed loan portfolios (NPLs), including on financial restructurings.

In addition to his work as a legal adviser, Sonny also serves as Kromann Reumert's knowledge ambassador within competition law, State aid law and European law. This means, among other things, that he is responsible for strengthening our internal knowledge sharing within these fields, including knowledge of market trends, new practice, new legislation, issue of newsletters, etc.

Sonny part-time lectures at the University of Copenhagen in the master course Competition Law and is a Steering Committee Member of Young Competition Law Professionals.


Sonny also holds a Graduate Diploma in Business Administration from the Copenhagen Business School (specialised within organisation and management), where his studies primarily have been focused around managerial economics, economics, statistics, strategy and management. Currently, Sonny is - concurrent with his work at Kromann Reumert - studying for an LL.M. at the Brussels School of Competition, specialising in competition law and competition economics.

  • Studying LL.M. at the Brussels School of Competition (2019-2020)
  • Graduate Diploma in Business Administration from the Copenhagen Business School, specialised within Organisation and Management (2018)
  • Master of Laws from the University of Copenhagen (2014)
  • London School of Economics and Political Science (2013)
Admission and right of audience
  • Attorney 2017
  • English
  • The Scandinavian languages
  • External lecturer at the University of Copenhagen in the master course Competition Law
  • Steering Committee Member, Young Competition Law Professionals 
  • Member of the Danish Competition Law Society
  • Member of the Danish State Aid Law Society
  • Member of the Danish European Law Association
  • Member of Young Arbitrators Copenhagen
  • Competition Law Policy & Debate, volume 4, issue 3, September 2018: "The Danish State aid regime"
  • "Criminal liability and sentencing in Danish cases regarding violations of section 6(1) in the Danish Competition Act, seen in the light of the tightening of sanctions per 1 March, 2013", Justitia 2015, no. 2, page 3
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