Mayer Brown London revenue jumps 20% to $268m in bumper year

Mayer Brown’s London office has reported record revenue of $268.2 million for 2025, marking a 20.5% increase on the previous year.

The growth forms part of a broader period of investment across the firm, aimed at strengthening collaboration between offices in Europe and the US.

The strategy

The US firm attributed the growth to sustained investment in its London platform, aligned with its broader global strategy and focused on meeting client demand for deeper product and industry specialisation. It also pointed to its ability to deliver coordinated advice across jurisdictions.

Dominic Griffiths, London managing partner, said: “We set out to build something distinctive - a platform where the best lawyers collaborate across borders and across the capital structure.

As clients navigate an increasingly complex transatlantic environment, we are able to deliver coordinated, specialist advice from London, New York, and beyond.”

Execution strength

The London office saw strong growth across key practice areas, particularly private equity and finance.

Mayer Brown lawyers in London and New York also worked together on 96 transatlantic deals in 2025, reflecting a continued push to integrate cross-border execution.

The firm also made eight lateral partner hires across private equity, leveraged finance, structured finance and energy.

The firm said it has expanded internal secondments and cross-border placements to strengthen “transatlantic execution strength”.

Flagship mandates

The year included a number of high-profile London-led transactions.

These included advising Standard Chartered Bank on the establishment of its $3 billion clean energy infrastructure CLO platform with Apollo, advising Ford Pension Schemes on a £4.6 billion pension risk transfer, and acting for Blackstone and Bourne Leisure on a £1.6 billion financing of holiday park operator Haven Group.