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Fieldfisher expands with Regan Wall merger
(L to R): Adrian Wall, Feilim O'Caoimh, Kieran Regan, and JP McDowell (Pic: Fieldfisher Ireland)

05 Nov 2025 business Print

Regan Wall merger ‘landmark’ for Fieldfisher

European law firm Fieldfisher has significantly expanded its Irish operations through a merger with Cork-based corporate-law firm Regan Wall LLP.

Regan Wall advises on high-value deals across various sectors – including healthcare, technology and financial services.

The Cork firm, led by partners Adrian Wall and Kieran Regan, will become part of Fieldfisher from 25 November.

International expansion

After the merger, Fieldfisher's total headcount in Ireland will increase to 140 – including 18 partners. There will be 124 people based in Dublin and 16 based in Cork.

Fieldfisher says that the latest development is part of its wider international expansion strategy. With a series of recent office openings in Austria, Italy, Poland and Portugal, Fieldfisher is now operating from 28 offices across 14 countries.

Fieldfisher Ireland will now operate from Regan Wall's offices at One South Mall in Cork, establishing its second location in Ireland.

The firm says that the merger will double the number of Fieldfisher professionals serving the corporate market in Ireland.

The newly combined corporate team in Ireland will be jointly led by M&A and corporate partner Feilim O'Caoimh, alongside Adrian Wall.

Fieldfisher says that the expansion is expected to increase its revenues in Ireland by over 20%.

‘Landmark moment’

JP McDowell (managing partner, Fieldfisher Ireland) described the merger as “a landmark moment” for clients of both firms and for Fieldfisher’s business in Ireland.

“By combining Regan Wall's outstanding domestic M&A expertise with Fieldfisher's established presence in the Irish market and our broader international footprint, we are creating a uniquely powerful corporate offering,” he stated.

Adrian Wall said that Fieldfisher “stood out” for Regan Wall when it came to choosing a partner for growth and expansion.

“Their collaborative culture, international reach, and sector expertise align with our own values and ambitions,” he said.

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