| Abraxas Petroleum Corp. |
24311300 |
| Armstrong Operating, Inc. |
2608500 |
| Bta Oil Producers, LLC |
21784100 |
| Burlington Resources Oil & Gas Company LP |
|
| Citation Oil & Gas Corp. |
2899500 |
| Cobra Oil & Gas Corporation |
|
| Condor Petroleum, Inc. |
2913900 |
| Continental Resources, Inc. |
5782500 |
| Crescent Point Energy U.S. Corp. |
|
| David H. Arrington Oil & Gas, Inc. |
|
| Eagle Operating, Inc. |
6938700 |
| Earthstone Operating, LLC |
39996700 |
| Enerplus Resources USA Corporation |
|
| Four Starr Production, LLC |
33742400 |
| Future Acquisition Company, LLC |
42514200 |
| Galaxy Oil |
23062000 |
| Hunt Oil Company |
3058300 |
| Imperial Oil Of North Dakota, Inc. |
2763100 |
| Jettison, Inc. |
2762800 |
| Kaiser-Francis Oil Company |
|
| Leland Oil & Gas, LLC |
26242600 |
| Liberty Resources Management Company, LLC |
36381300 |
| Murex Petroleum Corporation |
|
| Newfield Production Company |
21902400 |
| New Horizon Resources, LLC |
39861600 |
| Petro Harvester Operating Company, LLC |
28297100 |
| Petro-Hunt, L.L.C. |
|
| Prima Exploration, Inc. |
14695700 |
| Resource Energy Can-Am LLC |
|
| Rim Operating, Inc. |
28148000 |
| Ritter, Laber & Associates, Inc. |
2761700 |
| Samson Oil And Gas USA, Inc |
22855200 |
| Slawson Exploration Company, Inc. |
3325100 |
| Taqa USA, Inc. |
42090800 |
| Vast Operations, LLC |
40031400 |
| White Rock Oil & Gas, LLC |
38891000 |
| Whiting Oil And Gas Corporation |
|
| XTO Energy Inc. |
19995600 |