Lehman Reorganizes B&C Origination, Servicing Shops Lehman Brothers Bank has reorganized its key subprime units into operating subsidiaries in a move that some observers say could shield them from some predatory lending laws, On April 22, the Office of Thrift Supervision approved Lehman’s plan to purchase Aurora Loan Services and BNC Mortgage from its parent holding company. The two companies and their subsidiaries will become operating units of the thrift.