Berkshire Hathaway (NYSE: BRK.A, NYSE: BRK.B) is a conglomerate holing company headquartered in Omaha, Nebraska, U.S., that oversees and manages a number of subsidiary companies. Berkshire Hathaway's core business is insurance, including property and casualty insurance, reinsurance and specialty nonstandard insurance. The Company averaged a high annual return to its shareholders for the last 25 years while employing large amounts of capital and minimal debt.