Mark is a Partner in William Fry’s Corporate / M&A department. His practice consists primarily of transactional corporate engagements, including mergers and acquisitions, private equity and venture capital investment transactions (acting both for investors and for companies raising funding), and corporate restructurings. Mark also has significant experience in the use of partnership and limited partnership structures, both in private equity fund establishment and in joint venture and project financing scenarios.
Notable recent transactions include advising:
- Grant Thornton Advisors LLC (US) and New Mountain Capital on the combination of the US-based Grant Thornton advisory business with Grant Thornton Ireland’s advisory and tax practice.
- Mitsubishi Electric Corporation on a number of recent Irish transactions, including its acquisition of data centre services company Crystal Air and its acquisition of elevator servicing business Ascension Lifts.
- Polaris Partners and Elevate Medical on leading a US$120m equity investment round in Irish medtech company FIRE 1.
- TowerBrook Capital Partners on a significant investment in Let’s Get Checked, used to fund Let’s Get Checked’s acquisition of Truepill.
- Copenhagen Infrastructure Partners (CIP) on its investment in Greengate Biogas, a biomethane project developer focused on the establishment, construction and operation of a platform of bioenergy plants across the island of Ireland.
- Hamilton Beach Brands on its acquisition of HealthBeacon plc out of examinership, through a scheme of arrangement sanctioned by Ireland’s High Court.
- The British & Irish Lions on the appointment of Andy Farrell as Head Coach for the 2025 Lions Tour of Australia.
- U.S. Bank Europe (then trading in Ireland as Elavon) on the first ever inbound cross-border conversion into Ireland effected pursuant to the 2019 EU Mobility Directive.
- Nordic Aviation Capital, the world’s largest lessor of regional aircraft, on all Irish corporate aspects of its US$6.8bn debt restructuring and related emergence from Chapter 11 protection following a significant debt-for-equity exchange.
- Six Nations Rugby on a significant minority investment by CVC, and ongoing governance matters.
- EQT Life Sciences, the leading European healthcare investor, on various equity investments in Irish medtech and therapeutics companies, including Neurent Medical, Luma Vision and Vivasure Medical.
- Citigroup Global Markets in relation to its responsibilities under the Irish Takeover Rules (as financial advisor to funds managed by Clayton Dubilier & Rice (CD&R)), in the context of CD&R’s £2.8bn recommended all-cash offer for UDG Healthcare plc.
- International Consolidated Airlines Group (IAG) on its €1.4bn recommended all-cash offer for Aer Lingus Group plc.
2025 Chambers Global
"Mark is an excellent M&A lawyer. He is practical and responsive."
2025 Chambers Europe
"Mark Quealy is a very safe pair of hands."
2025 IFLR 1000
Mark is ranked as Highly Regarded in IFLR 1000 for Corporate / M&A.