King Koil is a United States-based brand of mattresses and bedding with 60 factories in 40 countries operated by independent licensees. It was founded by Samuel Bronstein in 1898 in Saint Paul, Minnesota. The company is now based in Willowbrook, Illinois. King Koil mattresses are sold in various furniture/mattress stores around the country.
The Sealy Corporation is an American owned major manufacturer of mattresses, based in Trinity, North Carolina, in the United States. The company draws its name from the city where it started, Sealy, Texas.
Serta is a company based in Hoffman Estates, Illinois that specializes in making mattresses. It was founded in 1931 by 13 mattress manufacturers who licensed the Serta name; subsequently eight independent licensees acting like a cooperative owned the company.
The Simmons Bedding Company is a major manufacturer of mattresses and related bedding products. The company was founded in 1870. Simmons' flagship brand is Beautyrest, and it is one of the oldest companies of this type in the USA. According to a Simmons press release, net sales for 2005 were $855 million.