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Alleghany Corporation
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Sep 18, 2026

07:01 AM EDTA look at the remarkable career of Warren Buffett, who bought his first stock at 11 and built a $1 trillion company · Business Insider

Alleghany Corporation creates value through owning and supporting its operating subsidiaries and managing investments, anchored by a core position in property and casualty reinsurance and insurance. Alleghany's property and casualty subsidiaries include: Transatlantic Holdings, Inc., a leading global reinsurer; RSUI Group, Inc., which underwrites wholesale specialty insurance coverages including property, casualty, professional liability and directors' and officers' liability; and CapSpecialty, Inc., an underwriter of commercial property, casualty and surety insurance coverages. Alleghany's subsidiary Alleghany Capital Corporation owns and manages a diverse portfolio of non-financial businesses.