National Gypsum Company is a building products manufacturer based in Charlotte, North Carolina. With 17 gypsum board plants in the US, it is one of the major producers globally. The company has a rich history, founded in 1925, and operates the largest open-pit gypsum mine in the world in Nova Scotia. Despite previously filing for bankruptcy, National Gypsum has evolved as a key player in the construction industry, known for its quality products and integrated manufacturing processes.