Fannie Mae: In 1938, the Federal government established the Federal National Mortgage Association (Fannie Mae) to expand the flow of mortgage money by creating a secondary market. It is a private company.

Freddie Mac: Created in 1970, the Federal Home Loan Mortgage Corporation (Freddie Mac) is a stockholder-owned corporation chartered by Congress to increase the supply of funds that mortgage lenders can make available to homebuyers.

Ginne Mae: In 1968, Congress established the Government National Mortgage Association (Ginnie Mae) as a government-owned corporation within the HUD.

OFHEO: The Office of Federal Housing Enterprise Oversight (OFHEO) works to ensure the capital adequacy and financial safety and soundness of Fannie Mae & Freddie Mac.