Conor McDonnell

Conor McDonnell | Litigation and Dispute Resolution Lawyer | Arthur Cox


Conor has practised in the area of commercial disputes for over 20 years and has specialised in large scale litigation across a range of areas including shareholder disputes, banking disputes, professional negligence claims and financial services.  He also has considerable expertise in relation to competition and regulatory disputes encompassing both regulatory intervention and inquiries, appeals, statutory appeals and judicial review.  He has handled regulatory cases across the telecom, aviation, energy and banking/financial sectors. Conor is also a member of the firm’s CSR Committee.


  • Acting for the administrator of a hedge fund in defence of a professional negligence claim for €400 million approx being brought by the liquidators of the fund
  • Acting for daa plc, the national airport operator, in a number of disputes, in particular, litigation with Ryanair and in disputes and appeals involving Ryanair and the Commission for Aviation Regulation challenging various determinations by the Commission fixing the level of airport charges
  • Advising shareholder disputes before the Commercial Court involving shareholder oppression in companies holding properties worth in excess of €200 million
  • Acting for domestic and international financial institutions in defence of a series of claims for alleged mis-selling of financial products particularly bonds and derivative instruments
  • Acting for the Irish Minister for Finance in defence of multiple linked claims challenging the recapitalisation of an Irish credit institution under the CISA Act
  • Acting for First Active plc (part of the RBS Group) in a series of linked proceedings brought by the Cunningham Group involving claims in excess of €150 million arising out of the appointment by First Active of a Receiver to the Cunningham Group
  • Acting for Fyffes plc in successful insider dealing case against DCC plc and others. This was the first case of its kind in Europe and was won on appeal to the Supreme Court
  • BA (Mod), 1984, Trinity College, Dublin
  • Admitted as a solicitor in Ireland, 1988
  • Conor sits on the Litigation Management Committee of the Law Society
  • CEDR Accredited Mediator
  • Conor is a Committee Member and was the founding Chairman of the Commercial Litigation Association of Ireland, a joint initiative between members of the Bar and solicitors practising in the area of Commercial Litigation.
  • Member of the firm’s CSR Committee