If you're a new homebuilder, Builders FirstSource wants you to look no further. The company sells hardware and doors, windows, lumber, and other structural building products to construction professionals. Customers have included D.R. Horton and Hovnanian Enterprises. Builders FirstSource has grown through acquisitions to operate about 52 distribution centers and 47 manufacturing plants in nearly 10 states. The company was founded in 1998 as BSL Holdings by a management team headed by former CEO John Roach and private investment firm JLL Partners. Affiliates of JLL and private equity firm Warburg Pincus own about 50% of Builders FirstSource's stock.