H\u00e5kon is a specialist in competition law and heads Wiersholm’s team of lawyers practicing EU\/competition law. He has extensive experience in handling complex competition cases, both from private practice and as the legal director of the Norwegian Competition Authority. In his practice as a lawyer, H\u00e5kon has handled some of the most high-profile merger cases in Norway. He has significant experience in dealing with cross-border mergers, and regularly represents clients in cases relating to cartel investigations and the possible abuse of market dominance vis-\u00e0-vis the Norwegian Competition Authority, the European Commission and the EFTA Surveillance Authority. In addition, H\u00e5kon also advises on EU\/EEA law, matters relating to government subsidies and administrative law.<\/p>\n
Chambers and Partners and Legal 500 have ranked H\u00e5kon as one of Norways most prominent competition law lawyers. In addition, he is ranked as an up-and-coming lawyer on competition law in the Norwegian Financial Daily\u2019s annual lawyers survey.<\/p>\n
H\u00e5kon is the co-author of the book Norsk Konskurranserett, Bind II Fusjonskontroll (Norwegian Competition Law, Volume II Merger Control).<\/p>\n","protected":false},"featured_media":0,"template":"","meta":{"editor_notices":[],"employee_title":"Partner","employee_mobile":"+47 99 16 33 91","employee_landline":"+47 21 02 11 08","employee_email":"hcst@wiersholm.no","_employee_initials":"hcst","_employee_user_id":"5c2c8949fd90963993268de2","_employee_cv_id":"5c2c8949fd90963993268de3","_employee_synced":"1776549028","employee_work_experiences":[{"description":"Partner","employer":"Wiersholm","year_from":"2016"},{"description":"Managing Associate","employer":"Wiersholm","year_from":"2013"},{"description":"Legal Director","employer":"The Norwegian Competition Authority","year_from":"2010"},{"description":"National Expert","employer":"The EFTA Surveillance Authority (Brussels)","year_from":"2007"},{"description":"Head of section","employer":"The Norwegian Competition Authority","year_from":"2006"},{"description":"Advisor\/Senior Advisor","employer":"The Norwegian Competition Authority","year_from":"2005"},{"description":"Associate\/Senior Associate","employer":"Ro Sommernes advokatfirma DA","year_from":"2002"}],"employee_educations":[{"degree":"Postgraduate Diploma in Economics for Competition Law","school":"King's College London","year_to":"2009"},{"degree":"Cand. Jur.","school":"University of Oslo","year_to":"2002"},{"degree":"LLM","school":"King's College London","year_to":"2001"}],"employee_positions":[{"name":"Leader, the Competition Law Reform Commission's secretariat","year_from":"2011","year_to":"2012","starred":""},{"name":"External examiner, University of Bergen","year_from":"2007","year_to":"","starred":""}],"employee_honors_awards":[{"for_work":"EU and Competition","issuer":"Legal 500","name":"Leading Partners ","year":"2026","starred":""},{"for_work":"Competition\/Antitrust","issuer":"Chambers Europe","name":"Band 1","year":"2026","starred":""},{"for_work":"EU\/EEA and Competition Law","issuer":"Advokatunders\u00f8kelsen, Kapital Jus","name":"Top 10","year":"2026","starred":""},{"for_work":"EU and competition","issuer":"Legal 500","name":"Leading Partners","year":"2025","starred":""},{"for_work":"Competition\/Antitrust","issuer":"Chambers Europe","name":"Band 1","year":"2025","starred":""},{"for_work":"EU \/ EEA and Competition law","issuer":"Advokatunders\u00f8kelsen, Kapital Jus","name":"Promising talents","year":"2025","starred":""},{"for_work":"EU \/ EEA and Competition law","issuer":"Advokatunders\u00f8kelsen, Finansavisen","name":"Top 10","year":"2023","starred":""},{"for_work":"EU and Competition","issuer":"Legal 500","name":"Leading Individuals","year":"2024","starred":""},{"for_work":"Competition\/Antitrust","issuer":"Chambers Europe","name":"Band 1","year":"2024","starred":""},{"for_work":"EU and Competition","issuer":"Legal 500","name":"Next Generation Partners","year":"2023","starred":""},{"for_work":"Competition\/Antitrust","issuer":"Chambers Europe","name":"Band 2","year":"2023","starred":""},{"for_work":"Competition law","issuer":"Advokatunders\u00f8kelsen, Finansavisen","name":"Top 10","year":"2022","starred":""},{"for_work":"Competition\/Antitrust","issuer":"Chambers Europe","name":"Band 2","year":"2022","starred":""},{"for_work":" EU and competition","issuer":"Legal 500","name":"Next Generation Partners","year":"2021","starred":""}],"employee_project_experiences":[],"employee_recommendations":[{"long_description":"I can confidently vouch for H\u00e5kon Cosma St\u00f8rdal's exceptional expertise and strategic guidance. H\u00e5kon demonstrates a profound understanding of competition law, effectively navigating our case through intricate legal challenges. H\u00e5kon's proactive approach and meticulous attention to detail were instrumental in anticipating potential issues and strategically steering our case to a favorable outcomes.","recommender":"Legal 500, 2025"},{"long_description":"H\u00e5kon Cosma St\u00f8rdal demonstrates a profound understanding of competition law, effectively navigating our case through intricate legal challenges. His support has been invaluable.","recommender":"Chambers Europe, 2025"},{"long_description":"H\u00e5kon Cosma St\u00f8rdal is very open to new ideas and into the core of every case and can find good arguments.","recommender":"Chambers Europe, 2025"}]},"authorisation_tax":[7],"award_tax":[],"competence_area_tax":[33,15,50],"role_tax":[57],"class_list":["post-142","employee","type-employee","status-publish","hentry","authorisation_tax-advokat","competence_area_tax-antitrust-and-competition","competence_area_tax-eu-and-eea-law","competence_area_tax-transportation-and-logistics","role_tax-partner"],"yoast_head":"\n