Alleghany Corporation is engaged in the industrial minerals business through its subsidiaries, World Minerals Inc. (World Minerals), Celite Corporation (Celite) and Harborlite Corporation (Harborlite). Alleghany conducts a steel fastener importing and distribution business through its subsidiary, Heads & Threads International LLC (Heads & Threads). The Company is also engaged in property, casualty, fidelity and surety insurance businesses through its subsidiary, Capitol Transamerica Corporation (Capitol Transamerica). In addition, through another subsidiary, Alleghany Properties, Inc. (Alleghany Properties), the Company owns and manages properties in California.