| 1 | R. & R. Exploration, Inc. | Denton, TX 76202 | Oil Operator | Nov 1993 |
| 2 | R.E.D. Resources, Inc. | Perryton, TX 79070 | Oil & Gas Operator | Apr 2004 |
| 3 | Range Production Company | Fort Worth, TX 76102 | Oil & Gas Operator | Sep 2021 |
| 4 | Ranger Operating Co. | Graham, TX 76450 | Oil & Gas Operator | Oct 2025 |
| 5 | Ratts, Robert V. Inc. | Bedford, TX 76021 | Oil & Gas Operator | Aug 2003 |
| 6 | Raylee Operating Company | Graham, TX 76450 | Oil & Gas Operator | Oct 2025 |
| 7 | Red Dove Oil & Gas, LLC | Mineral Wells, TX 76067 | Gas Operator | Oct 2025 |
| 8 | Red Stag Energy, LLC | Ozona, TX 76943 | Oil & Gas Operator | Jan 2022 |
| 9 | Regal Energy Operating, L.L.C. | Plano, TX 75024 | Oil & Gas Operator | Oct 2025 |
| 10 | Regal Petroleum Services | Euless, TX 76039 | Oil & Gas Operator | Aug 2002 |
| 11 | Regency Petroleum Co. Of New Mex | Coppell, TX 75019 | Oil & Gas Operator | Apr 2008 |
| 12 | Reichmann Petroleum Corp. | Grapevine, TX 76051 | Oil & Gas Operator | Oct 2025 |
| 13 | Reostar Operating Incorporated | Fort Worth, TX 76107 | Oil & Gas Operator | Sep 2012 |
| 14 | Republic Energy Inc. | Decatur, TX 76234 | Oil & Gas Operator | Dec 2016 |
| 15 | Republic Energy Operating, LLC | Decatur, TX 76234 | Oil & Gas Operator | Jan 2016 |
| 16 | Rhyne, J.V. | Cisco, TX 76437 | Oil & Gas Operator | Oct 2025 |
| 17 | Richey, Ray Management Co., Inc. | Fort Worth, TX 76108 | Oil & Gas Operator | Oct 2025 |
| 18 | Ridge Oil Company | Breckenridge, TX 76424 | Oil & Gas Operator | Oct 2025 |
| 19 | Rife Oil Properties Inc | Fort Worth, TX 76107 | Oil & Gas Operator | Oct 2025 |
| 20 | Rimrock Energy, LLC | Fort Worth, TX 76147 | Oil & Gas Operator | Oct 2012 |
| 21 | Rio O & P LLC | Pasadena, TX 77504 | Oil Operator | Oct 2025 |
| 22 | Rise Petroleum Investments LLC | Tomball, TX 77377 | Oil & Gas Operator | Oct 2025 |
| 23 | RKW Operating LLC | Weatherford, TX 76085 | Gas Operator | Oct 2025 |
| 24 | Roanoke Corporation | Fort Worth, TX 76102 | Oil & Gas Operator | Oct 1995 |
| 25 | Roberts & Hammack, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Oct 2025 |
| 26 | Robinson Operating Company | Abilene, TX 79604 | Oil & Gas Operator | Aug 2012 |
| 27 | Roca Resource Company, Inc. | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 28 | Rockoil Energy Of Texas, Inc. | Weatherford, TX 76086 | Oil & Gas Operator | Oct 2025 |
| 29 | Rockwall Marketing Corporation | Benbrook, TX 76126 | Oil & Gas Operator | Dec 2007 |
| 30 | Roil Mineral & Land Co. | Dallas, TX 75379 | Oil & Gas Operator | Oct 2025 |
| 31 | Rollo Resources, LLC | Granbury, TX 76049 | Gas Operator | Oct 2025 |
| 32 | Ropar Operating Co. | Wichita Falls, TX 76301 | Oil & Gas Operator | Oct 2025 |
| 33 | Roseland Oil & Gas Inc | Rockwall, TX 75087 | Oil & Gas Operator | Feb 2003 |
| 34 | Routh Operating, LLC | Dallas, TX 75204 | Oil & Gas Operator | Mar 2011 |
| 35 | Rover Petroleum Operating, LLC | Fort Worth, TX 76101 | Oil & Gas Operator | Oct 2025 |
| 36 | Rwa, LLC | Boyd, TX 76023 | Oil & Gas Operator | Oct 2025 |