Chicago-based IPA 100 firm RSM US LLP (FY24 net revenue: $4.03 billion) and London-based RSM UK Holdings Limited have voted overwhelmingly to form a new transatlantic partnership, effective January 1, 2026. The near-unanimous approval by partners of both firms paves the way for a unified, partner-owned platform designed to enhance global client service, accelerate growth, and strengthen talent development across markets.
Under the new structure, the combined organization will include more than 23,000 professionals across the United States, United Kingdom, Canada, Ireland, India, and El Salvador, generating aggregate annual revenue of $5 billion (USD). The partnership aligns governance, financial incentives, client service models, and future growth investments under a shared strategy.
“We are excited to create a new transatlantic partnership with shared values, enhanced reach, and connected resources,” said Brian Becker, RSM US managing partner and CEO of the new partnership. “This bold step positions us for accelerated growth and a scalable structure designed to support a $10 billion multinational partner-owned platform in the future.”
Rob Donaldson, CEO of RSM UK, added: “This announcement marks a defining moment for our firms on both sides of the Atlantic. Our new partnership allows us to make quicker, bolder decisions and deliver greater value to clients worldwide. It also creates new pathways for our people to collaborate, learn, and grow across borders.”
Both firms will continue as independent members of the RSM International network, which serves clients in more than 120 countries.
