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In a strategic move that underscores its accelerating European growth, Fieldfisher LLP announced Wednesday that it will merge with Irish boutique law firm Regan Wall LLP, a merger set to supercharge its corporate law capabilities in Ireland. The deal, effective November 25, will add 16 staff members—including seven lawyers—from Regan Wall’s Cork headquarters, giving Fieldfisher a second Irish base alongside its Dublin office.

Partners Adrian Wall and Kieran Regan, who lead the Regan Wall team, will join Fieldfisher as part of the merger, marking a new chapter for both firms in Ireland’s increasingly competitive corporate legal landscape.

Doubling Strength and Deepening Expertise

Following the merger, Fieldfisher’s Irish headcount will rise to 140 professionals, including 18 partners, effectively doubling its corporate law capacity and expanding its expertise in mergers and acquisitions. The firm projects that this expansion will boost its Irish revenue by more than 20%, reflecting both strategic ambition and growing client demand.

The integration also gives Regan Wall’s clients access to Fieldfisher’s vast international network, spanning Europe and beyond—a move that promises broader opportunities and a stronger global platform.

“This merger represents a landmark moment for clients of both Regan Wall and Fieldfisher, and for our business in Ireland,” said J.P. McDowell, Managing Partner of Fieldfisher Ireland. “By combining Regan Wall’s outstanding domestic M&A expertise with our international reach, we’re creating a uniquely powerful corporate offering.”

Leaders Praise Shared Vision and Synergy

McDowell emphasized that the partnership is “not just about scale—it’s about synergy, quality, and delivering exceptional value to clients across Ireland and beyond.”

Adrian Wall, speaking on behalf of Regan Wall, echoed that sentiment: “Fieldfisher’s collaborative culture, international reach, and sector expertise align perfectly with our values and ambitions. Joining Fieldfisher opens a broader platform for growth and innovation while continuing to deliver the high-quality, partner-led service we’re known for.”

A Growing European Footprint

The merger continues Fieldfisher’s aggressive international expansion strategy, which has seen it open new offices across Europe. The firm first entered the Irish market in 2019 through its merger with McDowell Purcell, led by McDowell himself.

Since then, Fieldfisher has established a presence in Vienna (June 2023), Milan (April 2024), Portugal (July 2024), and Poland, where it launched offices in Warsaw and Krakow earlier this year.

Fieldfisher’s Managing Partner Robert Shooter previously described Vienna as a gateway to Central and Eastern Europe and a “key hub for international arbitration.”

When the Regan Wall merger becomes official, Fieldfisher will boast 28 offices across 14 countries, positioning the firm as one of the fastest-growing European legal powerhouses—a global player with Irish roots and continental ambitions.