Mr Owen O'Sullivan > William Fry > Dublin, Ireland > Lawyer Profile

William Fry

Work Department

Litigation & Dispute Resolution.


Owen O’Sullivan is the Managing Partner of William Fry. He is a Partner in William Fry’s Litigation & Dispute Resolution Department. He specialises in commercial disputes, particularly shareholder and investment disputes, as well as disputes in the financial sector. He has been involved in many high profile property disputes and has product liability defence experience in the pharmaceutical, energy drink, motor and tobacco sectors.


Owen served as a member of the Law Society’s Litigation Committee for six years and is currently a member of the International Association of Defence Counsel, the International Bar Association, DRI Europe and the Steering Committee of the Commercial Litigation Association of Ireland.

Lawyer Rankings

Ireland > White-collar crime

William Fry‘s white-collar crime practice is frequently instructed by companies facing allegations of criminality, as well as by clients who have been the victims of white-collar crime. The practice is particularly active in the financial services sector, advising clients on responding to investigations by regulators and class action lawsuits; matters involving alleged anti-competitive practices are also an area of focus. Following the appointment of Owen O’Sullivan as firm managing partner in 2020, Laura Murdock and Paul Convery lead the team. Lisa Carty and Derek Hegarty are other names to note in the practice.

Ireland > Dispute resolution

(Leading individuals)

Owen O’SullivanWilliam Fry

William Fry stands out for its involvement in a range of big-ticket and landmark disputes. The core of the practice is not centred around one or two partners, with a range of senior individuals routinely engaged on significant matters. This includes mainstream commercial litigation, financial services and regulatory enforcement, inquiries, healthcare disputes, and professional negligence. Garrett Breen leads the team and is one of the most senior commercial litigators in the market, while managing partner Owen O’Sullivan, Lisa Carty and Paul Convery are amongst the firm’s most recognised disputes partners. Laura Murdock and consultant Deirdre O’Donovan are also key names.