Alleghany Corp. provides property, casualty reinsurance, insurance and financial services. It owns and manages operating subsidiaries and investments, anchored by a core position in property and casualty reinsurance and insurance. It operates through two segments: Reinsurance and Insurance. The Reinsurance segment consists of property and casualty reinsurance operations. The Insurance segment consists of property and casualty insurance operations. The company was founded by Oris Paxton Van Sweringen and Mantis James Van Sweringen in 1929 and is headquartered in New York, NY.