White Mountains Insurance Group, Ltd. has announced an agreement to acquire a majority stake in Distinguished Programs, a specialty property and casualty insurance MGA and program administrator. Under the terms of the deal, White Mountains will acquire approximately 50% of Distinguished's outstanding equity interests for $230 million, raising its total ownership to a 51% controlling interest. Distinguished, which manages over $550 million in premiums annually across 12 specialty programs, will continue to be led by its current executive management team, while Aquiline Capital Partners will remain a significant minority equityholder. The transaction is anticipated to close in the third quarter of 2025, subject to customary conditions.