NPC
National Petrochemical Public Company Limited
National Petrochemical Public Company Limited (NPC) was a major Thai producer of olefins and other petrochemical products, which later merged to form PTT Global Chemical.
NPC was a public company listed on the Stock Exchange of Thailand, with PTT Public Company Limited as a significant shareholder. It ceased to exist as an independent entity after merging with Thai Olefins Public Company Limited in 2005 to form PTT Chemical Public Company Limited (now PTT Global Chemical).