Name
 | URL | Country
| Market Cap (US$)
|
|---|
| Canadian Natural Resources Limited | http://www.cnrl.com/ | Canada | 25,890 |
| PTT Exploration & Production PC, Ltd | http://www.pttep.com | Thailand | 9,365 |
| Polskie Gornictwo Naftowe I Gazownictwo SA | http://www.pgnig.pl | Poland | 8,717 |
| Santos Ltd. | http://www.santos.com.au | Australia | 4,652 |
| Worleyparsons Limited | http://www.worleyparsons.com | Australia | 4,109 |
| Udmurtneft | http://www.udmurtneft.ru/ | Russia | Private |
| Queensland Gas Company Ltd | http://www.qgc.com.au | Australia | 3,132 |
| Essar Oil Limited | http://www.essar.com | India | 2,738 |
| Petrobras Energia SA | http://www.petrobrasenergia.com/ | Argentina | 2,230 |
| Plains Exploration & Production (PXPC) | http://www.plainsxp.com/ | United States | 2,072 |
| West Siberian Resources Ltd. | http://www.westsiberian.com/ | Bermuda | 1,658 |
| Petrobras Energia Participacoes S.A | http://www.petrobrasenergia.com | Argentina | 1,588 |
| Vermilion Energy Trust | http://www.vermilionenergy.com | Canada | 1,468 |
| Linn Energy, LLC | http://www.linnenergy.com | United States | 1,352 |
| Tanganyika Oil Company Ltd. | http://www.tanganyikaoil.com/ | Canada | 1,346 |
| Petroleum Geo-Services ASA | http://www.pgs.com | Norway | 1,305 |
| Natural Resource Partners L.P. | http://www.nrplp.com/ | United States | 1,223 |
| Ukrnafta Public Joint Stock Company | http://www.ukrnafta.kiev.ua/ | Ukraine | 918 |
| Beach Petroleum Ltd | http://www.beachpetroleum.com.au | Australia | 901 |
| Atlas Pipeline Partners, LP | http://www.resourceamerica.com | United States | 811 |
|
