Fieldfisher integrates Regan Wall in Ireland

Fieldfisher has announced a significant expansion of its operations in Ireland through its merger with Regan Wall, a boutique corporate firm that, according to business research company Experian Market IQ, ranked third nationally in terms of M&A transaction volume during the first six months of 2025.

Rodrigo Martos, co-managing partner of Fieldfisher Spain and partner in charge of Corporate M&A, explains: “From Spain, we welcome this strategic move, which strengthens Fieldfisher’s position as a European leader in corporate and M&A transactions. The addition of the Regan Wall team strengthens our ability to offer clients comprehensive solutions in international transactions, especially in a context where the connection between the Irish, British and continental markets is key. This move consolidates our coordinated growth strategy in Europe and reaffirms our commitment to supporting companies in their expansion, investment and development projects with a cross-border perspective and first-class execution.”

Regan Wall joins Fieldfisher

The Regan Wall firm, led by partners Adrian Wall and Kieran Regan, will join Fieldfisher next month, significantly strengthening the firm’s presence in Ireland. Following the transaction, Fieldfisher will have 140 professionals in the country, including 18 partners, distributed between Dublin (124) and Cork (16).

The merger is part of Fieldfisher’s international expansion strategy, which in recent months has seen it open offices in Austria, Italy, Poland and Portugal, bringing its total to 28 offices in 14 countries. In Ireland, the firm will operate from Regan Wall’s offices at One South Mall (Cork), its second location in the country.

The new Irish team, co-led by Feilim O’Caoimh and Adrian Wall, will double Fieldfisher’s capacity in the local corporate market and strengthen its M&A practice. The integration is expected to increase revenue in Ireland by more than 20%, consolidating the firm’s position in the Irish legal market.

The expanded team will join Fieldfisher’s global M&A group, comprising 60 partners across Europe, and will continue to advise on mergers and acquisitions, commercial contracts, corporate governance, private equity, joint ventures, restructurings and corporate finance.

JP McDowell, managing partner of Fieldfisher Ireland, commented: “This merger represents a historic moment for Regan Wall and Fieldfisher clients, as well as 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 an exceptionally powerful corporate offering. Adrian and Kieran bring deep sector expertise in M&A that will significantly strengthen our capabilities, positioning our corporate practice among the foremost in the country. This merger is not just about scale, but about synergy, quality and delivering exceptional value to clients in Ireland and beyond.”

Adrian Wall, partner at Regan Wall, added: “We have 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 values and ambitions. Kieran and I are truly excited to join Fieldfisher, not only for our clients, but also for our team. This union opens up a broader platform for growth and innovation, while continuing to offer the personalised, high-quality service that characterises us.”