Markel is a financial holding company. Co.'s main business markets and underwrites specialty insurance products. Co.'s insurance business operations include: Underwriting, which comprised of insurance and reinsurance operations; Insurance-linked securities (ILS), which include insurance and investment fund managers that provides investment products such as ILS and catastrophe bonds; and Program services, which writes insurance products including general liability insurance. Co.'s investing activities are related to its underwriting operations. Through its subsidiary, Markel Ventures, Inc. Co. owns interests in various businesses that operate outside of the specialty insurance marketplace.