ABC Supply Co. Inc. is the largest wholesale distributor of roofing in the United States and one of the nation’s largest wholesale distributors of select exterior and interior building products.

Building products distributor ABC Supply Co. Inc. has acquired the distribution assets of Sellmore Industries, a distributor of steep-slope roofing, siding and windows with locations in Hagerstown ...

ABC Supply says it will now operate more than 700 locations in 49 states, with annual sales of more than $8 billion. L&W Supply, previously owned by USG Corp., has 136 branches in 35 states.