Máire O'Neill


Máire is a partner in our Corporate Department and Co-lead of the Firm’s Energy, Renewables and Utilities practice group. She specialises in transactional corporate with a particular emphasis on private equity transactions (acting for both companies and investors) and M&A transactions in the technology, fintech and energy and utilities sectors.

Máire O'Neill

Máire has vast experience advising emerging and scaling companies and venture capital investors on equity investments in the Irish market as well as venture debt providers on the equity aspects of their funding. She also advises on a wide range of general corporate matters, including corporate restructurings (solvent and insolvent) including domestic mergers and capital reductions.

Recent significant deals include advising:

  • Private Equity Firm, CBPE on its acquisition of Irish tech company Signel Web Services
  • Co-Founder of Taoglas on the majority take acquisition by US private equity firm Graham Partners
  • EirGrid plc, the national transmission system operator, in connection with the development and financing of the 700MW HVDC Celtic Interconnector between Ireland and France with a capital cost in excess of €1.6bn.Fenergo Group in connection with its acquisition of Sentinels
  • Wealth at Work on its acquisition of Irish financial advisors Employee Financial Wellness
  • Carlyle Cardinal on its sale of The City Bin Company to Thorntons Recycling
  • Low code CyberSecTech Tines on its $55m Series B2 Fundraising as well as previous Series B and Series A and A2 fundraisings
  • FinTech Apata.comp on its equity and SAFE fundraisings
  • Element Investments on the disposal of Terra Solar to Omnes backed Power Capital
  • Advising several leading venture debt providers on the equity elements of their venture debt transactions
  • Imagine Learning on its acquisition of Irish EdTech company Robotify Labs
  • Fenergo Group on its acquisition by Astorg and Bridgepoint (as well as its previous equity investments and corporate structuring)
  • DCC plc group on its acquisition of Naturgy Ireland, Jones Oil and Campus Oil
  • Supporting our Corporate Restructuring & Insolvency teams advising stakeholders in numerous retail insolvencies and restructurings

Ranking & Recommendations

Article and Insights
May 2023
With applications for RESS 3 qualification opening this week, we take a look at th...
Fergus Devine
Article and Insights
Aug 2022
This long-awaited Bill, once enacted, will provide Ireland with a mechanism for pr...
Cormac Little SC
Article and Insights
Mar 2022
Ms. McGuinness addressed over 80 delegates at the William Fry  ESG & Sustainabilit...
Máire O’Neill
Article and Insights
Apr 2021
The UK and EU have agreed a Memorandum of Understanding in relation to future coop...
Máire O’Neill