| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Rampike Resources, LTD | Denver, CO 80202 | Oil Operator | Aug 2025 |
| 2 | Red Mesa Holdings/O&G LLC | Oil & Gas Operator | Nov 2014 | |
| 3 | Red Mountain Energy LLC | Oil & Gas Operator | Sep 2017 | |
| 4 | Red Mountain Resources LLC | Oil & Gas Operator | Sep 2023 | |
| 5 | Red River Ranch Holdings LLC | Gas Operator | Jan 2015 | |
| 6 | Red Willow Production Company | Oil & Gas Operator | Sep 2025 | |
| 7 | Renegade Oil & Gas Company LLC | Oil & Gas Operator | Sep 2025 | |
| 8 | Retamco Operating Inc | Red Lodge, MT 59068 | Oil & Gas Operator | Sep 2025 |
| 9 | Rim Operating, Inc. | Englewood, CO 80112 | Oil & Gas Operator | Dec 2025 |
| 10 | Rio Mesa Resources Inc | Oil Operator | Jul 2022 | |
| 11 | Ritchie Exploration, Inc. | Wichita, KS 67278 | Oil & Gas Operator | Jun 2025 |
| 12 | Robertson* Dexter | Gas Operator | Dec 2018 | |
| 13 | Rosewood Resources Inc | Dallas, TX 75201 | Oil & Gas Operator | Dec 2025 |
| 14 | Roughhouse Oil & Gas LLC | Oil & Gas Operator | Sep 2025 | |
| 15 | RWL Enterprises | Oil & Gas Operator | Feb 2017 |