mattress firm to buy sleepys for 780 million business briefingnov 30 2015mattress firm said on monday that it had agreed to buy the owner of the mattress retailer sleepys for about 780 million in a deal that will combine the top two specialty mattress retailers in the united states shares of mattress firm were up 104 percent at 5450 after the bell on monday the deal will give mattress firm more than 1050 stores in 17 states with the deal mattress firm will now enter massachusetts vermont new jersey maryland connecticut and rhode island the company said in a conference call