| 1 | Ragars Oil & Gas Co. | Austin, TX 78716 | Oil & Gas Operator | Oct 2025 |
| 2 | Ramsower Minerals Corporation | Beeville, TX 78104 | Oil & Gas Operator | Sep 2013 |
| 3 | Ramtex Energy LLC | Tulsa, OK 74114 | Oil & Gas Operator | Oct 2025 |
| 4 | Range Production Company | Fort Worth, TX 76102 | Oil & Gas Operator | Sep 2021 |
| 5 | Raven Forest Operating, LLC | H SPG NTL PK, AR 71909 | Oil & Gas Operator | Oct 2025 |
| 6 | RCM Engineering, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Sep 2003 |
| 7 | Redwood Operating, Inc. | Houston, TX 77058 | Oil & Gas Operator | Oct 2025 |
| 8 | Regal Petroleum Services | Euless, TX 76039 | Oil & Gas Operator | Aug 2002 |
| 9 | Reh Energy, Inc. | Corpus Chrsti, TX 78413 | Oil & Gas Operator | Oct 2025 |
| 10 | Reliance Energy, Inc. | Midland, TX 79701 | Oil & Gas Operator | Oct 2025 |
| 11 | Remora Operating LLC | Houston, TX 77056 | Oil & Gas Operator | Oct 2025 |
| 12 | Reneau, James Seed Co. | Shamrock, TX 79079 | Oil & Gas Operator | Oct 2025 |
| 13 | Renuergy LLC | Houston, TX 77024 | Oil & Gas Operator | Jan 2024 |
| 14 | Resaca Resources, L.L.C. | Austin, TX 78746 | Oil & Gas Operator | Oct 2025 |
| 15 | Reserve Operating Corp. | Houston, TX 77040 | Oil & Gas Operator | Oct 2025 |
| 16 | Riddle Engineering Corp. | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Jul 2011 |
| 17 | Riley Exploration Opg Co, LLC | La Grange, TX 78945 | Oil & Gas Operator | Oct 2025 |
| 18 | Riley Exploration, LLC | Blanchard, OK 73010 | Oil & Gas Operator | Oct 2025 |
| 19 | Rincon Petroleum Corporation | Corpus Chrsti, TX 78427 | Oil & Gas Operator | Oct 2025 |
| 20 | Rio Bravo Oil Company | The Woodlands, TX 77381 | Oil & Gas Operator | Feb 2002 |
| 21 | Rio Exploration Company | San Antonio, TX 78209 | Gas Operator | Dec 2005 |
| 22 | Rio-Tex, Inc. | San Antonio, TX 78217 | Oil & Gas Operator | Oct 2025 |
| 23 | Rise Petroleum Investments LLC | Tomball, TX 77377 | Oil & Gas Operator | Oct 2025 |
| 24 | Rme Petroleum Company | Houston, TX 77251 | Oil & Gas Operator | Nov 2016 |
| 25 | Roberson Oil Company | Houston, TX 77046 | Oil & Gas Operator | Jun 2025 |
| 26 | Robison, J. H. & Assoc. LTD. | Corpus Chrsti, TX 78413 | Oil & Gas Operator | Apr 1996 |
| 27 | Rock Resources, Inc. | Corpus Chrsti, TX 78414 | Oil & Gas Operator | Oct 2025 |
| 28 | Rodel Oil & Gas Company | Houston, TX 77218 | Oil & Gas Operator | Oct 2025 |
| 29 | Rodeo Resources, L.L.C. | Houston, TX 77079 | Oil & Gas Operator | Dec 2024 |
| 30 | Rodessa Operating Company | Corpus Chrsti, TX 78426 | Oil & Gas Operator | Oct 2025 |
| 31 | Rollert Co., Inc., The | Luling, TX 78648 | Oil & Gas Operator | Nov 2000 |
| 32 | Roma Oil And Gas, Inc. | San Antonio, TX 78209 | Oil & Gas Operator | Oct 2025 |
| 33 | Roseland Oil & Gas Inc | Rockwall, TX 75087 | Oil & Gas Operator | Feb 2003 |
| 34 | Rosewood Resources, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Oct 2025 |
| 35 | Royal Oil & Gas Corp. | Indiana, PA 15701 | Oil & Gas Operator | Apr 2014 |
| 36 | Royal Production Company, Inc. | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Oct 2025 |