WEALTH November 5, 2025 0 Comments

Fieldfisher and Regan Wall Join Forces: What This Shock Merger Means for the Future of Corporate Law—and Your Business

Ever wonder what happens when a powerhouse London-based law firm teams up with one of Ireland’s sharpest boutique corporate players? Well, Fieldfisher just answered that question big time. They’re merging their Irish operations with Regan Wall—a firm that’s been killing it in the M&A game, ranking third nationally for deal volume in early 2025. This isn’t just a shakeup; it’s a seismic shift that’s about to double Fieldfisher’s muscle in the Irish corporate market, boost their headcount to 140 pros, and supercharge their cross-border capabilities. Think bigger offices, deeper expertise, and a serious bump in revenue—all wrapped up with some serious swagger from partners Adrian Wall and Kieran Regan leading the charge. If you’re watching the legal landscape, this merger is the kind of bold move that demands attention. LEARN MORE

London-headquartered Fieldfisher has announced plans to merge its Irish operations with Regan Wall, one of Ireland’s most active boutique corporate law firms.

Partners Adrian Wall and Kieran Regan will join Fieldfisher with their team from 25 November and will bring deep expertise in corporate transactions and a strong client base to the firm.

Regan Wall was ranked third nationally for M&A deal volume in the first half of 2025 by Experian Market IQ.

Following the merger, Fieldfisher’s total headcount in Ireland will increase to 140 professionals, including 18 partners, comprising 124 people based in Dublin and 16 based in Cork.

The newly combined team will be jointly led by M&A and corporate partner Feilim O’Caoimh and Adrian Wall, and Fieldfisher Ireland will operate from Regan Wall’s offices at One South Mall in Cork.

For Regan Wall, the merger provides access to Fieldfisher’s international network and platform, enabling the team to offer broader capabilities and seamless cross-border support.

The merger is part of Fieldfisher’s wider international expansion strategy. Following recent office openings in Austria, Italy, Poland and Portugal, Fieldfisher is now operating from 28 offices across 14 countries.

The transaction will double the number of Fieldfisher professionals serving the corporate market in Ireland and deepen the expertise available in M&A in particular.

Fieldfisher expects the deal to increase its revenues in Ireland by over 20%, further consolidating its standing in the Irish legal market.

JP McDowell, managing partner of Fieldfisher Ireland, said: “This merger represents a landmark moment for clients of both Regan Wall and Fieldfisher, and for our 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.

“Adrian and Kieran bring deep sector-led M&A experience that will significantly enhance our capabilities, positioning our corporate practice among the most prominent in the country.

“This merger is not just about scale, it’s about synergy, quality and delivering exceptional value to clients across Ireland and beyond”.

Adrian Wall, partner at Regan Wall, said: “We’ve built something special at Regan Wall, and when it came to choosing a partner for our growth and expansion, Fieldfisher stood out for us.

“Their collaborative culture, international reach and sector expertise align with our own values and ambitions. Kieran and I are genuinely excited to join Fieldfisher, not just for our clients but for our team as well.

“Joining Fieldfisher opens a broader platform for growth and innovation, while continuing to deliver the high-quality, partner-led service we’re known for.”

Feilim O’Caoimh, corporate partner at Fieldfisher Ireland, said: “Having worked opposite Adrian and Kieran on transactions over the years, we’ve seen first-hand the quality of their work and the natural alignment of our values.

“This merger brings together complementary strengths and shared values, and I’m excited about the opportunities it creates for our clients and our team.”

Robert Shooter, managing partner of Fieldfisher, said: “We are thrilled to welcome Adrian, Kieran and the Regan Wall team to Fieldfisher.

Fieldfisher Regan Wall — Fieldfisher Ireland’s will operate from Regan Wall’s Cork offices.

“Their entrepreneurial mindset, strong market reputation and cultural alignment make them an ideal fit for our platform.”

The expanded Irish team will join the global Fieldfisher M&A team of 60 partners across Europe, who regularly act on complex, multi-jurisdictional transactions.

Photo: (l-r) Adrian Wall, Feilim O’Caoimh, Kieran Regan, and JP McDowell. (Pic: Ken Walsh)