Just two institutions – Fannie Mae and Freddie Mac – end up securitizing the vast majority of conventional home loans, but a large universe of lenders deliver a significantly diverse supply of loans to the government-sponsored enterprises. A new Inside Mortgage Finance special report based on loan-level securities disclosures reveals that 1,848 different institutions delivered single-family mortgages to the two GSEs during the third quarter. They ranged in size from Wells Fargo, which delivered nearly a quarter of mortgages securitized by Fannie and Freddie during the period, to Wisconsin-based Universal Mortgage Corp., which sold one small $39,000 loan to Fannie during the period. The report, GSE Seller Profile: 3Q12, shows...