From their website:
SRS Acquisition Corporation (dba SRS Roofing Supply) consists of a family of industry-leading independent roofing distributors that share a common goal and purpose – to focus all of our efforts on serving the professional roofing contractor. SRS is a private company sponsored by AEA investors and lead by a management team of industry veterans who understand the needs of the professional contractor. We have grown rapidly through acquisition and the opening of multiple new locations since our February, 2008 inception as more fully detailed in “Our History“. With this aggressive growth in a down market, SRS has established itself as one of the fastest growing building products distribution companies in the U.S.