Pssst: Select Portfolio Servicing (SPS) services mostly subprime single-family residential mortgage loans. The company collects on impaired-credit loans and non-performing loans for clients such as mortgage companies, banks, and bond insurers. It also also performs loss recovery and contingency collections and offers valuation services through its Residential Real Estate Review affiliate. SPS's servicing portfolio is worth some $30 billion. Founded in 1999, SPS operates offices in Jacksonville, Florida, and Salt Lake City. Credit Suisse bought SPS and its parent, SPS Holding, from mortgage insurer PMI Group in 2005 for more than $140 million.