| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Rathpro Inc | Douglas, WY 82633 | Oil & Gas Operator | Feb 1994 |
| 2 | Remuda Energy Development LLC | Billings, MT 59104 | Oil & Gas Operator | Aug 2025 |
| 3 | Reunion Energy Company | Houston, TX 77056 | Oil & Gas Operator | May 1996 |
| 4 | Richardson Operating Company | Denver, CO 80237 | Oil & Gas Operator | Jul 2025 |
| 5 | Rim Operating, Inc. | Englewood, CO 80112 | Oil & Gas Operator | Oct 2025 |
| 6 | Rki Exploration & Production LLC | Tulsa, OK 74172 | Oil & Gas Operator | Oct 2025 |
| 7 | Rock Creek Resources LLC | Englewood, CO 80112 | Oil & Gas Operator | Dec 2021 |
| 8 | Royal Oil LLC | Flower Mound, TX 75028 | Oil Operator | Dec 2015 |