Ameriquest Tops B&C Issuance Pack Through 2Q Ameriquest Mortgage paced the subprime securitization market through the first half of 2003, a new Inside B&C Lending ranking of the top issuers and underwriters shows. Ameriquest issued $9.77 billion in subprime mortgage-backed securities during the first half of the year, a massive 282 percent year-to-date rise. That performance left the company, which plans to expand its product line this year to include Alt A mortgages, with an