Ameristar Casinos is a gaming company that operates casinos in several states in the United States. The company was founded in 1954 and is headquartered in Las Vegas, Nevada. Ameristar Casinos operates under the brand name Ameristar and is known for its luxury casinos and resorts. The company has a staff of over 15,000 employees and serves millions of customers annually. Ameristar Casinos is a publicly traded company and is listed on the NASDAQ stock exchange.