HOUSTON--(BUSINESS WIRE)--Mattress Firm Holding Corp. (the "Company") (NASDAQ:MFRM) today announced the proposed sale of 1,505,000 shares of its common stock by certain selling stockholders, certain of whom are management or otherwise affiliated with directors of the Company, including investment funds affiliated with J.W. Childs Associates, L.P., to UBS Investment Bank, as the sole underwriter in the proposed registered public offering of those shares. The Company is not selling any shares of