Text: The Simmons Bedding Company is an American major manufacturer of mattresses and related bedding products, based in Atlanta, Georgia. The company was founded in 1870, and is one of the oldest companies of its kind in the United States. Simmons' flagship brand is Beautyrest. In addition to operating 18 manufacturing facilities in the United States and Puerto Rico, the company licenses its products internationally. According to a Simmons press release, net sales for 2005 were $855 million, and its revenue was $1.13 billion in 2007 and $1.228 billion in 2013. As of 2011, Simmons ranked in third place among U.S. mattress manufacturers, with a 15.7 percent market share. In 2012, Simmons and its sister company Serta International were acquired by American private equity company Advent International.

Question: are simmons and serta owned by the same company?
yes