Fionán Breathnach


f: +353 1 614 5001

Fionán is a partner in our Financial Services team and is Head of our Investment Funds and Financial Regulation teams. Fionán advises fund promoters on structuring, establishing and listing investment funds in Ireland, including UCITS, RIAIFs and QIAIFs and most recently has advised asset managers on structuring such funds as ICAVs. He also advises fund administrators, custodians, asset managers, AIFMs and other related service providers on the establishment of operations in Ireland and in relation to their ongoing business.

Fionán also advises a wide range of other financial services operations, domestic and international, on their obligations under Irish and EU financial services regulations. These include issues relating to business set-up and licensing process, regulatory capital, interfacing with regulators, anti-money laundering, market abuse, distance selling of financial products, MiFID and all other regulatory aspects of their business. 


  • Investment Funds
  • Financial Regulation

Representative Matters

  • Advising Comeragh Capital on the establishment of a UCITS ICAV.
  • Advising Perfectcard, the first electronic money institution to be licensed in Ireland, on its successful licence application. 
  • Representing Mitsubishi UFJ in its acquisition of UBS’s fund administration business.


Chambers Global - The World's Leading Lawyers, Chambers and Partners, 2017

Fionán is ranked in Tier 1 of Investment Fund lawyers in Ireland. Fionán is "very knowledgeable and able to resolve any issues promptly and efficiently. His knowledge of the Irish investment funds and AIFMD is invaluable."

The Legal 500, 2017

"Extremely knowledgeable" and has a "deep industry knowledge"

Speaking Engagements & Teaching

  • Spoke on “Key Client Concerns” at a Seminar hosted by Mason Hayes & Curran in London in June 2017 entitled “Brexit Update: Regulatory Issues Considered by the Central Bank of Ireland” with the Director of Policy & Risk at the Central Bank of Ireland, Gerry Cross.
  • Spoke on “Hard Brexit and Financial Services Regulation” at an In-House Counsel Masterclass hosted by Mason Hayes & Curran in Dublin in April 2017.


"European Union Securities Legislation", 5th Edition, published by Mason Hayes & Curran, co-author Paul Egan.

"European Union Securities Legislation", 4th Edition, published by Mason Hayes & Curran, co-author Paul Egan.

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Areas of Expertise

Investment Funds Financial Services Financial Regulation Law AIFMD UCITS Equity Capital Markets Debt Capital Markets Brexit

Professional Memberships

Law Society of Ireland

Legal and Regulatory Committee of the Irish Funds Industry Association

Electronic Money and Payments Association

Investment Companies and Mutual Funds Committee of the International Bar Association


University of Dublin, Trinity College (LLB)

ACCA (Certified Diploma in Accounting & Finance)