Clayton Homes is the United States' largest builder of manufactured housing and modular homes. Clayton Homes is a component company of Warren Buffetts Berkshire Hathaway. Claytons corporate headquarters are in Maryville, Tennessee. Its subsidiaries include Vanderbilt Mortgage, 21st Mortgage, the nations largest manufactured home lender, and insurance company HomeFirst Agency. Clayton Homes was founded in 1956 by Jim Clayton. In 1974, Clayton Homes established its own mortgage company, and added a manufacturing division in 1975. The company went public in 1983, trading on the New York Stock Exchange. Each year from 1989 through 1992, Clayton Homes was named on the Forbes list of the best small companies in America. Kevin Clayton, Jim Claytons son, took over the company in 1999.