MGIC Investment Corporation, through its subsidiaries, provides private mortgage insurance and ancillary services to lenders and government sponsored entities in the United States. The company offers primary mortgage insurance that provides mortgage default protection on individual loans, as well as covers unpaid loan principal, delinquent interest, and various expenses associated with the default and subsequent foreclosure; and pool insurance coverage, which covers the excess of the loss on a defaulted mortgage loan that exceeds the claim payment under the primary coverage. It also provides contract underwriting services; and other services, such as analysis of loan originations, loan portfolios, and servicing portfolios, as well as training and mortgage lead generation services. In addition, the company participates in external reinsurance arrangements and captive mortgage reinsurance arrangements. It serves originators of residential mortgage loans, including savings institutions, commercial banks, mortgage brokers, credit unions, mortgage bankers, and other lenders. The company was founded in 1957 and is headquartered in Milwaukee, Wisconsin.