Core Insights - Bishop Street Underwriters has received a strategic structured capital investment of $125 million from White Mountains Insurance Group, which will support its growth objectives in 2026 and beyond [1][5] - In its 2025 results, Bishop Street reported gross written premiums exceeding $650 million and maintained a portfolio loss ratio below 50% [2][4] - White Mountains reported gross written premiums of $268 million for its property and casualty re/insurance segment Ark/WM Outrigger, with a combined ratio of 77% for the fourth quarter of 2025 [3] Company Performance - Bishop Street's performance in 2025 included surpassing $650 million in gross written premiums and achieving industry-leading organic growth while keeping a sub-50% portfolio loss ratio [2][4] - The partnership with Kalepa, specializing in AI-powered underwriting solutions, aims to enhance support for Bishop Street's London-based managing general agents [2] Strategic Partnership - Chad Levine, CEO of Bishop Street, expressed enthusiasm about White Mountains joining as a strategic growth partner, emphasizing the momentum and commitment to backing elite underwriters [4] - White Mountains' CEO, Liam Caffrey, highlighted Bishop Street's emergence as an industry-leading MGA platform, indicating confidence in its ability to capitalize on growth opportunities [4] - The partnership is expected to leverage White Mountains' expertise in scaling successful MGAs and unlock new opportunities for Bishop Street and its operating partners [4]