U.S. government‑sponsored mortgage finance company. Fannie Mae, officially the Federal National Mortgage Association (FNMA), is a U.S. government-sponsored enterprise dedicated to expanding the secondary mortgage market. Headquartered in Washington, D.C., Fannie Mae buys mortgages from lenders and securitizes them into mortgage-backed securities, providing consistent liquidity to the housing market and supporting affordable homeownership across the country. The company was established in 1938 and has operated under the conservatorship of the Federal Housing Finance Agency since 2008. In 2024, Fannie Mae managed more than $4.3 trillion in assets and employed approximately 8,200 people. Its critical role in U.S. housing finance and the scale of its securities make Fannie Mae one of the largest financial institutions in the nation.