Shearman & Sterling and K&L Gates have both posted increased global revenues, becoming the latest US-headquartered law firms to report strong financial performance in 2013.

In London, Shearman saw a 20% revenue increase to $134.8m (£80.9m), the office’s fourth straight year of revenue growth against a lawyer headcount rise of 7%. The results mean that since 2009, City revenue has increased 36%.