| Symbol | Name | Country | Exchange |
|---|---|---|---|
| BP | BP p.l.c. | US | NYSE |
| PEO | Petroleum Resources Corporation | US | NYSE |
| XOM | Exxon Mobil Corporation | US | NYSE |
| EIPAF | Eni S.p.A | US | OTC |
| IPXHF | Inpex Corp | US | OTC |
| IPXHY | Inpex Corporation | US | OTC |
| OMVJF | OMV Aktiengesellschaft | US | OTC |
| OMVKY | OMV Aktiengesellschaft | US | OTC |
| PTT | PTT Public Company Limited | TH | BK |
| 036460 | Korea Gas Corporation | KR | KO |
| 9918 | Shin Shin Natural Gas Co Ltd | TW | TW |