The businesses of the Saint-Gobain Group in India are housed in two large entities, Grindwell Norton Limited (GNO), a publicly traded company, and Saint-Gobain India Pvt. Ltd. (SGIPL).Grindwell Norton is a part of the High Performance Materials division, which is a part of the Innovative Materials Sector of the Group. Listed on the Bombay and National Stock Exchanges, the Company pioneered the manufacture of grinding wheels in India in 1941. Saint-Gobain currently holds 51.66% of the equity capital of GNO. Today, GNO's businesses include: Abrasives, Silicon Carbide, High Performance Refractories, Performance Plastics and ADFORS. INDEC (the captive India IT Development Centre for the Saint-Gobain Group globally) is also a part of GNO.GNO's subsidiary, Saint-Gobain Ceramic Materials Bhutan Pvt. Ltd., manufactures Silicon Carbide. GNO holds 70% of the equity of this Company.The CertainTeed business, which is a part of the Construction Products Sector of Saint-Gobain, also operates under GNO.