| 1 | R & S Energy Company | Luling, TX 78648 | Oil & Gas Operator | Dec 2010 |
| 2 | R&R Resources Corporation | Houston, TX 77056 | Oil & Gas Operator | Dec 2015 |
| 3 | Ram Operating Company, Inc. | Houston, TX 77002 | Oil & Gas Operator | Sep 2012 |
| 4 | Ramsey Production Company, LLC | Austin, TX 78766 | Oil & Gas Operator | Jan 2017 |
| 5 | Range Production Company | Fort Worth, TX 76102 | Oil & Gas Operator | Sep 2021 |
| 6 | Rayalto Oil & Gas, Inc. | MC Queeney, TX 78123 | Oil & Gas Operator | Mar 2004 |
| 7 | Rcy Mineral Group, Inc. | El Campo, TX 77437 | Oil Operator | Jul 2010 |
| 8 | Reef Exploration, Inc. (A-1) | Richardson, TX 75080 | Oil & Gas Operator | Oct 2006 |
| 9 | Remora Management, LLC | The Woodlands, TX 77382 | Oil & Gas Operator | May 2024 |
| 10 | Renaissance Petroleum Co LLC | Houston, TX 77058 | Oil & Gas Operator | Nov 2011 |
| 11 | Reo Operating LLC | Austin, TX 78747 | Oil & Gas Operator | May 2024 |
| 12 | Resaca Resources, L.L.C. | Austin, TX 78746 | Oil & Gas Operator | May 2024 |
| 13 | Resource Expl & Prod, Inc. | Salado, TX 76571 | Oil & Gas Operator | May 2024 |
| 14 | Richardson, Marshall T. | Midfield, TX 77458 | Oil & Gas Operator | May 2024 |
| 15 | Ricochet Energy, Inc. | San Antonio, TX 78258 | Oil & Gas Operator | May 2024 |
| 16 | Rincon Petroleum Corporation | Corpus Chrsti, TX 78401 | Oil & Gas Operator | May 2024 |
| 17 | Rio-Tex, Inc. | San Antonio, TX 78217 | Oil & Gas Operator | May 2024 |
| 18 | Riptide Energy LLC | Austin, TX 78701 | Oil & Gas Operator | May 2024 |
| 19 | Roc Operating, Inc. | Plano, TX 75093 | Oil & Gas Operator | Oct 2008 |
| 20 | Rock Resources, Inc. | Corpus Chrsti, TX 78414 | Oil & Gas Operator | May 2024 |
| 21 | Rodeo Resources, L.L.C. | Houston, TX 77079 | Oil & Gas Operator | May 2024 |
| 22 | Rodessa Operating Company | Corpus Chrsti, TX 78426 | Oil & Gas Operator | May 2024 |
| 23 | Roome Exploration Company | Bartlett, TX 76511 | Oil & Gas Operator | Mar 2008 |
| 24 | Roome Oil Co. | Bartlett, TX 76511 | Oil & Gas Operator | May 2024 |
| 25 | Ross Production Co. | Shreveport, LA 71101 | Oil & Gas Operator | Mar 2000 |
| 26 | Rowan-Ungerecht, Inc. | Van, TX 75790 | Oil & Gas Operator | Sep 1993 |
| 27 | Royal Oil & Gas Corp. | Indiana, PA 15701 | Oil & Gas Operator | Apr 2014 |
| 28 | Royko Oil Company | Horseshoe Bay, TX 78657 | Oil & Gas Operator | May 2024 |
| 29 | RPM Operating Company | New Braunfels, TX 78131 | Oil & Gas Operator | Mar 2008 |