New entity, effective in 2026, will combine 23,000 professionals and create a unified platform designed to better serve global middle-market clients.
Partners at RSM US and RSM UK have voted to approve a new transatlantic partnership, creating a combined entity with aggregate annual revenues of $5 billion. The new structure, which received near-unanimous support from partners at both firms, is set to become effective January 1, 2026.
The move formalizes an intent announced in October 2024 to strengthen the relationship between the two firms. The goal of the partnership is to create a more integrated platform for serving global clients by aligning governance, financial incentives and future growth investments. This structure is intended to allow the firm to make quicker decisions and compete more effectively for multinational business.
Under the new partnership, 23,000 professionals will operate across the U.S., the UK, Canada, Ireland, India and El Salvador. Brian Becker, currently the Managing Partner of RSM US, will serve as CEO of the new transatlantic entity.
"This bold step builds on the momentum of our other recent investments – including in artificial intelligence and our digital core, new service offerings and integrated solutions – to stay ahead of clients' evolving needs," Becker stated. He also noted that the partnership creates a scalable structure designed to support a future $10 billion multinational platform.
The integration aims to provide a more formidable challenge to larger competitors, particularly in the highly sought-after middle market. By combining resources and presenting a unified front, the firm can better service clients with operations on both sides of the Atlantic.
Rob Donaldson, CEO of RSM UK, commented on the strategic advantages of the move. "We have, over the last 12 months, already seen new opportunities and tangible client wins that our firms could not have achieved independently," he said. Donaldson added that the partnership provides new opportunities for talent development through cross-border collaboration.
Despite the close operational and financial integration, both firms will continue to be independent members of the RSM International network.
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