Thai regulator blocks state-run PTT’s $4b bid to buy Glow Energy Power grids. Photo: Fré Sonneveld/unsplash Chalida Ekvitthayavechnukul October 11, 2018 PremiumThailand’s Energy Regulatory Commission (ERC) has blocked PTT Pcl subsidiary Global Power Synergy Pcl (GPSC) from acquiring a 69.11 per cent stake in Glow Energy Pcl. Continue reading this story with a subscription to DealStreetAsia. Subscribe Already a subscriber? Log in Should your colleagues be reading this article too? Contact us for corporate subscriptions at firstname.lastname@example.org.