Revenue in Sidley Austin‘s London office climbed by almost a third year-on-year in 2025, rising by 32% to hit $299m.
The increase, which came against a 9% hike in global revenue to $3.74bn, means the firm’s London office alone generated enough fee income to sit within the UK top 40 last year. London turnover for 2024 stood at $226.7m.









