| Petrolhead Limited | | Live |
| MCC PETROLI LIMITED | | Live |
| Italia Petroli Limited | Private company limited by shares | Dissolved |
| LEONG PETROLI (H.K.) CO. LIMITED | Private company limited by shares | Live |
| PETROLIA LIMITED | Private company limited by shares | Dissolved |
| PETROLIA E&P LIMITED | Private company limited by shares | Dissolved |
| U.S.A. PETROLIC SHARES LIMITED | Private company limited by shares | Dissolved |
| PETROLINK COMPANY LIMITED | Private company limited by shares | Dissolved |
| Mineralis Petrolis Hong Kong Limited | Private company limited by shares | Dissolved |
| GLOBAL PETROLIUM CENTER CO LIMITED | Private company limited by shares | Live |
| NOVA PETROLIUM LIMITED | Private company limited by shares | Dissolved |
| SOUZ PETROLIUM LIMITED | Private company limited by shares | Dissolved |
| SOUZ PETROLIUM (ASIA) LIMITED | Private company limited by shares | Live |
| SOUZ PETROLIUM (ASIA) LIMITED | Private company limited by shares | Live |
| PetroLog Limited | Private company limited by shares | Live |
| PETROLOG INTERNATIONAL COMPANY LIMITED | Private company limited by shares | Live Ceased dormancy on 25-Feb-2002 |
| PETROLOG MARINE SERVICES LIMITED | Private company limited by shares | Dissolved |
| EASTERN PETROLOGY LIMITED | Private company limited by shares | Dissolved |
| Petroltech Asia Limited | Private company limited by shares | Live |
| Petroltech Co., Limited | Private company limited by shares | Live |
| PETROLUM HK LIMITED | Private company limited by shares | Dissolved |
| GERMANY JINA INT'L PETROLUM GROUP LIMITED | Private company limited by shares | Dissolved |
| PETROLUX LIMITED | Private company limited by shares | Live |
| PETROM LIMITED | Private company limited by shares | Live |
| CHINA PETRO-MACHINERY TRADING LIMITED | Private company limited by shares | Live |
| Petromag Technology Limited | Private company limited by shares | Live |
| PetroMamut Investments Asia Limited | Private company limited by shares | Live |
| PETROMARINE LIMITED | Private company limited by shares | Dissolved |
| PETROMATERIALS AMERICA LIMITED | Private company limited by shares | Live |
| PetroMax Limited | Private company limited by shares | Live |
| PETROMETALS AG LIMITED | Private company limited by shares | Dissolved |
| PETROMEX LIMITED | Private company limited by shares | Dissolved |
| Petromin Resources (Asia) Limited | Private company limited by shares | Dissolved |
| Petromin Resources (China) Limited | Private company limited by shares | Dissolved |
| PETROMINE PRC CO., LIMITED | Private company limited by shares | Live |
| PETROMINE ASIA CO., LIMITED | Private company limited by shares | Live |
| Petromine Group Limited | Private company limited by shares | Live |
| PETROMON INTERNATIONAL FINANCIAL INVESTMENT LIMITED | Private company limited by shares | Live |
| PETROMONACO LIMITED | Private company limited by shares | Dissolved |
| Petron AI HK Limited | | Live |
| PETRON ASIA LIMITED | Private company limited by shares | Dissolved |
| PETRON ENTERPRISE LIMITED | Private company limited by shares | Dissolved |
| PETRON TRADING LIMITED | Private company limited by shares | Dissolved |
| Petrona Co., Limited | | Live |
| Petrona E-Commerce Co., Limited | | Live |
| PETRONAL LIMITED | Private company limited by shares | Dissolved |
| PETRONAS ASIA LIMITED | Private company limited by shares | Live |
| PetroNavi Company Limited | Private company limited by shares | Live |
| PetRoNeft Holding Limited | Private company limited by shares | Live |
| Petronell Holding Limited | Private company limited by shares | Live |
| PETRONES LUBRICANTS (CHINA) LIMITED | Private company limited by shares | Live |
| Petronesia Global Holdings Limited | Private company limited by shares | Live |
| Petronexx Well Engineering (HK) Limited | Private company limited by shares | Dissolved |
| Petronius Capital Limited | | Live |
| PETRONUSA INCORPORATION LIMITED | Private company limited by shares | Dissolved |
| PETRO-OFFSHORE ENGINEERING LIMITED | Private company limited by shares | Live |
| PETROOVERSEAS FEDERATION LIMITED | Private company limited by shares | Live |
| PETROOVERSEAS INVESTMENT COMPANY LIMITED | Private company limited by shares | Dissolved |
| PETROPACIFIC CO., LIMITED | Private company limited by shares | Dissolved |
| PETROPHYSICAL SERVICE LIMITED | Private company limited by shares | Dissolved |
| PETRO-PROM PROJECTS LIMITED | Private company limited by shares | Live |
| PETROQUIP LIMITED | Private company limited by shares | Dissolved |
| PETRORESOURCE SERVICE COMPANY LIMITED | Private company limited by shares | Dissolved |
| PETRORIA INDUSTRIAL LIMITED | | Live |
| PETRORICH LIMITED | Private company limited by shares | Live |
| PetroRock Equipment Co., Limited | Private company limited by shares | Live |
| PETROSALES HK CO., LIMITED | | Live |
| PETROSERVE LIMITED | Private company limited by shares | Live |
| PETROSIN LIMITED | Private company limited by shares | Live |
| PETROSINO HK LIMITED | Private company limited by shares | Live |
| PETROSOM INVESTMENT CO., LIMITED | Private company limited by shares | Dissolved |
| PETROSOURCING UK LIMITED | Private company limited by shares | Live |
| PETROSUMIT (HONG KONG) CO., LIMITED | Private company limited by shares | Dissolved |
| PETROSUN LIMITED | Private company limited by shares | Live |
| PETROSUPPLY LIMITED | Private company limited by shares | Dissolved |
| PETROTECH OIL AND GAS LIMITED | Private company limited by shares | Dissolved |
| PETROTECH ASIA LIMITED | Private company limited by shares | Live |
| PETROTECH CO., LIMITED | Private company limited by shares | Live |
| OILROAD PETRO-TECH CO., LIMITED | Private company limited by shares | Live |
| PETRO-TECH PERUANA CO., LIMITED | Private company limited by shares | Dissolved |
| PHOENIX PETRO-TECH CO., LIMITED | Private company limited by shares | Dissolved |
| Delta Petrotech Limited | Private company limited by shares | Live |
| H-STAR PETROTECH COMPANY LIMITED | Private company limited by shares | Live |
| PETRO-TECH INNOVATION LIMITED | Private company limited by shares | Live |
| MEECAN PETROTECH LIMITED | Private company limited by shares | Live |
| Sino-Can PetroTech Limited | Private company limited by shares | Live |
| Petro-tech Solutions Limited | Private company limited by shares | Live |
| TORO UCONS PETROTECH LIMITED | Private company limited by shares | Dissolved |
| UNITED PETROTECH LIMITED | Private company limited by shares | Live |
| Petrotek Limited | Private company limited by shares | Live |
| PETROTEK LIMITED | Private company limited by shares | Live |
| PETROTEX CA LIMITED | Private company limited by shares | Live |
| PETROTIME HK LIMITED | Private company limited by shares | Live |
| PETROTIQUE HOLDINGS LIMITED | Private company limited by shares | Live |
| PETROTIQUE INTERNATIONAL LIMITED | Private company limited by shares | Live |
| Petrotique Investments Limited | Private company limited by shares | Live |
| PETROTIQUE FINANCIAL SERVICES LIMITED | | Live |
| PETROTIQUE TRADING COMPANY LIMITED | Private company limited by shares | Live |
| PETROTRANS COMPANY LIMITED | Private company limited by shares | Live |
| PETROTTA COMPANY LIMITED | Private company limited by shares | Live |