HOUSTON--(BUSINESS WIRE)--Mattress Firm Holding Corp. (the “Company”) (NASDAQ:MFRM) today announced that it has commenced an underwritten public offering of 2,185,130 shares of its common stock by certain selling stockholders. The selling stockholders have also granted the underwriter a 30-day option to purchase up to an additional 327,769 shares of common stock on the same terms and conditions. The Company is not selling any shares of common stock in the proposed offering and will not receive