| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | R L Operating Co LLC | Oil Operator | Dec 2023 | |
| 2 | Reserve Partners L.L.C. | Oil & Gas Operator | Feb 2001 | |
| 3 | Rig Iron Petroleum Inc | Oil & Gas Operator | Aug 1988 | |
| 4 | Rio Grande Drilling Company | San Antonio, TX 78212 | Oil & Gas Operator | Dec 1999 |
| 5 | Risher Company, Inc. | Oil & Gas Operator | Jul 2001 |