White Mountains’s $2.2 Billion Sale of Sirius to CMI

On July 18, 2025, BroadStreet Partners (“BroadStreet”), a leading middle-market insurance brokerage, announced the successful closing of a strategic investment by an investor group led by Ethos Capital, British Columbia Investment Management Corporation and White Mountains Insurance Group, Ltd. (“White Mountains”). Accounts advised by T. Rowe Price Investment Management, Inc. also participated. Ontario Teachers’ Pension Plan will retain a significant co control stake in BroadStreet and continue its partnership with the Ethos-led investor group. Cravath is representing White Mountains in connection with the transaction.

On July 7, 2025, White Mountains Insurance Group, Ltd. (“White Mountains”), a Bermuda‑domiciled financial services holding company, announced it has entered into an agreement to acquire a majority stake in Distinguished Programs (“Distinguished”), an MGA and program administrator for special property & casualty insurance. White Mountains will acquire approximately 50% of Distinguished’s outstanding equity interests for $230 million, which will result in White Mountains holding a 51% controlling interest in Distinguished following the closing of the transaction. Cravath is representing White Mountains in connection with the transaction.

On October 20, 2023, White Mountains Insurance Group, Ltd. (“White Mountains”), a Bermuda‑domiciled financial services holding company, announced that it has entered into an agreement to acquire a majority stake in Bamboo Ide8 Insurance Services, LLC (“Bamboo”), a managing general agent focused on the California homeowners insurance market. White Mountains expects to invest approximately $285 million, including primary capital to support Bamboo's growth, and to acquire approximately 70% of Bamboo’s outstanding equity interests. Cravath is representing White Mountains in connection with the transaction.