Tempur Sealy International Inc. TPX announced Tuesday that it would acquire Mattress Firm Inc., a privately held company. The deal is valued at $4 billion. Mattress Firm Inc. had to postpone its initial public offer in January because of market volatility. Tempur Sealy stated that the deal included $2.7 billion cash and $1.3 million in stock which will be distributed to Mattress Firm shareholders. Tempur Sealy expects to work “cooperatively” with the Federal Trade Commission in order to complete the purchase, which is expected to be completed by the end of the year.