San Miguel Corporation
Caltex
Petronas
Mobil
ExxonMobil
Pertamina
Saudi Aramco
JG Summit Holdings
PTT Public Company Limited
Singapore Petroleum Company
Lopez Holdings Corporation
Seaoil
Shell plc
Filipino oil and gas company
petron.com
Petron Corporation is the largest oil refining and marketing company in the Philippines, supplying more than a third of the country's oil requirements. Wikipedia