NMI Holdings Inc through its subsidiaries provides private mortgage guaranty insurance. The company offers mortgage insurance, reinsurance on loans, and outsourced loan review services to mortgage loan originators. It serves national and regional mortgage banks, money center banks, credit unions, community banks, builder-owned mortgage lenders, Internet-sourced lenders, and other non-bank lenders. It protects lenders and investors from default-related losses on a portion of the unpaid principal balance of a covered mortgage.