| 1 | Ramtex Energy LLC | Tulsa, OK 74114 | Oil & Gas Operator | Oct 2025 |
| 2 | Range Production Company | Fort Worth, TX 76102 | Oil & Gas Operator | Sep 2021 |
| 3 | Re-Op Corp. | Houston, TX 77274 | Oil & Gas Operator | Oct 2025 |
| 4 | Red Willow Production, LLC | Ignacio, CO 81137 | Oil & Gas Operator | Oct 2015 |
| 5 | Republic Resources, LLC. | San Antonio, TX 78212 | Oil & Gas Operator | Oct 2025 |
| 6 | RHC Energy (USA) LLC | Houston, TX 77027 | Oil Operator | Oct 2025 |
| 7 | Ricks Expl Acquisition Corp | Oklahoma City, OK 73102 | Oil & Gas Operator | Jan 2004 |
| 8 | Ricks Expl Acquisition LLC | Midland, TX 79701 | Oil & Gas Operator | Aug 2013 |
| 9 | Ridge Petroleum Inc. | Tyler, TX 75701 | Oil & Gas Operator | Oct 2025 |
| 10 | Ridley Oil Corporation | Tyler, TX 75702 | Oil & Gas Operator | Nov 1996 |
| 11 | Riley Exploration, LLC | Blanchard, OK 73010 | Oil & Gas Operator | Oct 2025 |
| 12 | Rippy Oil Company | Tyler, TX 75702 | Oil & Gas Operator | Oct 2025 |
| 13 | Rise Petroleum Investments LLC | Tomball, TX 77377 | Oil & Gas Operator | Oct 2025 |
| 14 | River City Resources Inc | Tulsa, OK 74119 | Oil & Gas Operator | Nov 1997 |
| 15 | Rivershore Operating LLC | Dallas, TX 75206 | Oil & Gas Operator | Oct 2025 |
| 16 | Rme Petroleum Company | Houston, TX 77251 | Oil & Gas Operator | Nov 2016 |
| 17 | Robbins Energy, Inc. | Longview, TX 75606 | Oil & Gas Operator | Sep 1994 |
| 18 | Roberts & Hammack, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Oct 2025 |
| 19 | Rockefeller Hughes (USA) LLC | Houston, TX 77027 | Oil & Gas Operator | Jul 2015 |
| 20 | Rodessa Operating Company | Corpus Chrsti, TX 78426 | Oil & Gas Operator | Oct 2025 |
| 21 | Roosth & Genecov Production Co. | Tyler, TX 75710 | Oil & Gas Operator | Aug 2003 |
| 22 | Roosth Production Co. | Tyler, TX 75711 | Oil & Gas Operator | Oct 2025 |
| 23 | Rose City Resources, LLC | Tyler, TX 75703 | Oil & Gas Operator | Oct 2025 |
| 24 | Roy Jackson Energy Operating, LLC | Midland, TX 79701 | Oil & Gas Operator | Oct 2025 |
| 25 | RRCH Corp. | Longview, TX 75606 | Oil & Gas Operator | Dec 2013 |
| 26 | Rusk Energy Operating LLC | Houston, TX 77040 | Oil & Gas Operator | Oct 2025 |
| 27 | Rwa, LLC | Boyd, TX 76023 | Oil & Gas Operator | Oct 2025 |