Federal Home Loan Mortgage Corporation operates in the secondary mortgage market in the United States. The company purchases single-family and multifamily residential mortgage loans originated by lenders, as well as invests in mortgage loans and mortgage-related securities. It operates through two segments, Single-family and Multifamily. The Single-family segment purchases, securitizes, and guarantees single-family loans; and manages single-family mortgage credit risk, as well as manages mortgage-related investments portfolio, single-family securitization activities, and treasury functions. This segment serves mortgage banking companies, commercial banks, regional banks, community banks, credit unions, housing finance agencies, savings institutions, and non-depository financial institutions. The Multifamily segment engages in the purchase, sale, securitization, and guarantee of multifamily loans and securities through the issuance of multifamily K and SB certificates; issuing and guarantying other securitization products; issuing other credit risk transfer products; and provision of other mortgage-related guarantees. It serves banks and other depository institutions, insurance companies, money managers, central banks, pension funds, state and local governments, real estate investment trusts, brokers and dealers, and a range of lenders. The company was founded in 1970 and is headquartered in McLean, Virginia.