• Uppsala University, LL M, 1993
  • K.U. Leuven, Belgium 1992-1993

Other qualifications

  • Appointed by the Government as an expert in the inquiry about Extended powers for the Swedish Competition Authority (Committee Directive 2015:48)
  • Appointed by the Swedish Competition Authority as Non-Governmental Advisor (NGA) in the International Network of Competition Authorities (ICN).  
  • Member of expert forums and networks, including inter alia ICC Sweden’s Competition Group, Lex Mundi Antitrust Competition and Trade Group, European Competition Lawyers Forum (ECLF), American Bar Association’s Section of Antitrust Law and International Bar Association’s Antitrust and Trade Law Section.



Merger Control 2016 – Sweden chapter Chambers Global Practice Guides April 13, 2016
2013 Antitrust Year in Review American Bar Association Sweden Chapter, p 153-155 September 02, 2013
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Konkurrensrätt – en handbok, 5 upplagan Karnov Group September 10, 2014
Konkurrensrätt - en kommentar, 4:e upplagan Thomson Reuters Professional 2009 January 01, 2009
Competition Cases from the European Union Thomson och Sweet & Maxwell, 2008, p 1193-1219 January 01, 2008
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Johan Karlsson is commended by sources for his

"experience in high-level cases" and "good standing in the market."

He is particularly adept at navigating complex behavioural issues and investigations before Swedish and European competition authorities. Chambers & Partners 2021

Johan Karlsson earns acclaim as a “main competitor” among peers who regard him as

“one of the best in Sweden”

for contentious competition proceedings. Thought Leader i WhosWhoLegal (2021)

Johan Karlsson provides us with world-class advice tailored to our industry. He is always available and able to describe complex competition law issues in a simple way for clients. He is highly appreciated and respected throughout the company. - Legal 500 2020

Johan Karlsson receives strong praise from clients, who describe him as a "really excellent lawyer; he knows our business very well so it's very easy to get precise, on-point advice." His well-regarded competition practice encompasses merger clearance, dawn raids and cartel disputes, including damages proceedings. - Chambers & Partners 2020

Johan Karlsson  has over two decades' experience advising on the full spectrum of competition law mandates, advising on a broad range of disputes and investigations, including dawn raids. A client describes him as a "senior lawyer with high competence and market insight."  Chambers & Partners 2019

Sources regularly name Johan Karlsson as amongst the leading competition lawyers in Sweden - Chambers & Partners 2018

Johan Karlsson is hailed as “one of the best competition lawyers in Sweden; he always delivers and is a good discussion partner.” He is well versed in handling both contentious and non-contentious issues. - Chambers & Partners 2017

Clients describe Johan Karlsson as "one of the best in Sweden, if not the best, for competition law." He has recently acted on a number of leading merger cases, as well as representing clients in antitrust litigation. - Chambers & Partners 2016

Practice head Johan Karlsson remains highly valued by all commentators for his significant competition law expertise, and for "his ability to make very mature judgements on how to proceed." - Chambers & Partners 2015

Johan Karlsson is appreciated by clients and recognised by peers for his exceptionally high-quality work. One client commented: “He has a solid legal knowledge and high integrity; you can always trust his advice.” - Chambers & Partners 2014

Johan Karlsson comes highly recommended for his competition law knowledge as well as his responsiveness and business-oriented approach. An impressed client reports: "He saved the day on a crucial case" - Chambers & Partners 2013 

"Speedy and extremely competent” - Legal 500, 2012

Johan Karlsson is a leading figure in the Stockholm office and is described as “very talented; right to the point with his advice.” - Chambers & Partners 2011

“Excellent, knowledgeable’ antitrust expert” - Legal 500, 2011