Sullivan & Cromwell and Skadden Arps Slate Meagher & Flom have emerged as the top US law firms in European M&A over the last three years, according to research produced for Legal Week that show the pair have worked on the highest value of deals over the period.

Sullivan ranked first in the value tables for UK and Europe, according to figures compiled by Legal Week’s data partner Mergermarket. The New York firm has advised on 173 European deals worth a total value of E839.7bn (£603bn) since November 2004 and 60 deals worth a total of E244bn (£175.3bn) in the UK.