Businesses

PTT Group

PTT Public Company Limitedhttp://www.pttplc.com

Upstream

PTT Exploration and Production Public Company Limitedhttp://www.pttep.com

Petrochemical/Oil&Refining

PTT Global Chemical Public Company Limited http://www.pttgcgroup.com/
Thaioil Public Company LimitedHttp://www.thaioil.co.th
IRPC Public Company Limitedhttp://www.irpc.co.th