Shearman & Sterling and Skadden, Arps, Slate, Meagher & Flom have taken the lead roles as Japanese insurance firm Sompo acquires New York-listed insurer Endurance Specialty Holdings for $6.3 billion.

Shearman is advising Sompo, one of Japan’s largest property insurers, with a team comprising Tokyo M&A partner Kenneth Lebrun, London M&A partners Frank Miller and George Karafotias, and London finance partner Barney Reynolds.