Tresmares Capital supports Sovereign Capital Partners in the successful exit of Affinia

Sovereign Capital Partners has announced its exit from Affinia, a leading UK provider of accounting, tax, and business advisory services, through a sale to RedBird Capital Partners, subject to regulatory approval.

Three years ago, Sovereign backed the off-market MBO of LB Group with a clear ambition: to build a scaled, fully integrated national accountancy and advisory platform in a highly fragmented market. That ambition has been successfully realized.

During this period, the business:

Rebranded as Affinia to reflect its national identity
Grew to more than 1,000 professionals across 19 offices
Completed 16 bolt-on acquisitions
Became one of the UK’s Top 25 accountancy firms following the integration of UHY Hacker Young’s Brighton, London, and Nottingham offices
Delivered strong organic growth while investing in leadership, systems, and governance

This outcome reflects the quality, ambition, and culture of the Affinia team, led by CEO Darren Redmayne and a highly capable management group. Sovereign has expressed its best wishes for the company’s next phase of growth with RedBird and thanked everyone involved in the journey.

Tresmares Capital is proud to have supported Sovereign Capital Partners and the Affinia management team on an exceptional growth trajectory, with the company increasing revenues from £12 million to over £100 million in less than three years.

This transaction exemplifies the type of growth story Tresmares Capital is built to support. Its flexible investment structure — starting from sub-£10 million tickets — enables early-stage platform backing while scaling financial commitment as the business grows. Tresmares does not simply provide initial capital; it remains a committed partner throughout the entire journey.

With its ability to adapt to companies at different stages and sizes, Tresmares Capital positions itself as a consistent financing partner, from initial investment through to meaningful scale