Patrick Horan

  • Patrick Horan
  • +353 1 920 1063
  • Arthur Cox, Ten Earlsfort Terrace, Dublin 2, D02 T380, Ireland


Patrick is a partner in the Competition & Regulated Markets Group. His practice covers the full range of EU and Irish competition law, including merger control, investigations, State aid, competition law aspects of agreements, implementation of compliance programmes, and competition litigation. Prior to joining Arthur Cox in 2016, Patrick worked in the London and Brussels offices of Slaughter and May. Patrick is co-author of the Ireland chapters of the International Comparative Legal Guide to Competition Litigation and Merger Control 2018, and in 2017 was named as one of the future leaders in competition law by Who’s Who Legal.


  • Advising Mediahuis NV on the Irish competition and regulatory aspects of its acquisition of Independent News & Media plc
  • Advising Cognziant Technology Solutions Corporation on its acquisition of Zenith Technologies
  • Advising LacPatrick Cooperative Society on its merger with Lakeland Dairies
  • Advising eir on the EU and Irish merger control and regulatory aspects of its acquisition by Xavier Niel
  • Advising undertakings in the motor insurance sector in connection with the ongoing investigations by the CCPC and the European Commission
  • Advising Accenture on the Irish merger control aspects of its acquisition of the Rothco Group
  • Advising Greenergy International on the EU merger control aspects of its acquisition of Inver Energy
  • Advising Volvo Trucks and Renault Trucks on its defence of follow-on damages actions in the Irish High Court arising from the European Commission’s decision in the Trucks cartel
  • Advising CRH plc in relation to the CCPC’s investigation in to the bagged cement sector in Ireland, as well as advising CRH in relation to its successful defence of the CCPC’s Supreme Court appeal against the decision of the High Court concerning a dawn raid conducted in May 2015
  • LLM, Trinity College Dublin, 2007
  • LLB, Trinity College Dublin, 2006
  • Admitted as a solicitor in Ireland, 2016
  • Admitted as a solicitor in England & Wales, 2010
  • Law Society of Ireland
  • Law Society of England & Wales