| 1 | Rainbow Energy Corporation | Midland, TX 79701 | Oil & Gas Operator | Nov 2002 |
| 2 | Rap Operating, L.L.C. | Jena, LA 71342 | Oil & Gas Operator | Sep 2026 |
| 3 | Rawhide Operating, Inc. | New Braunfels, TX 78131 | Oil & Gas Operator | Sep 2026 |
| 4 | Rcy Mineral Group, Inc. | El Campo, TX 77437 | Oil Operator | Jul 2010 |
| 5 | Red Wolf Oil Company, Inc. | Brenham, TX 77833 | Oil & Gas Operator | Sep 2026 |
| 6 | Reddy Disposals, LLC | Beeville, TX 78104 | Oil Operator | Sep 2026 |
| 7 | Reichmann Petroleum Corp. | Grapevine, TX 76051 | Oil & Gas Operator | Sep 2026 |
| 8 | Remora Management, LLC | The Woodlands, TX 77382 | Oil & Gas Operator | Sep 2026 |
| 9 | Remora Operating LLC | Houston, TX 77056 | Oil & Gas Operator | Sep 2026 |
| 10 | Reo Operating LLC | Austin, TX 78747 | Oil & Gas Operator | Sep 2026 |
| 11 | Republic Resources, LLC. | Longview, TX 75605 | Oil & Gas Operator | Sep 2026 |
| 12 | Resaca Resources, L.L.C. | Austin, TX 78746 | Oil & Gas Operator | Sep 2026 |
| 13 | Resource Expl & Prod, Inc. | Salado, TX 76571 | Oil & Gas Operator | Sep 2026 |
| 14 | Richardson, Marshall T. | Midfield, TX 77458 | Oil & Gas Operator | Sep 2026 |
| 15 | Richman Petroleum Corp. | Grapevine, TX 76051 | Oil & Gas Operator | Jul 2006 |
| 16 | Rife Oil Properties Inc | Fort Worth, TX 76107 | Oil & Gas Operator | Sep 2026 |
| 17 | Rincon Petroleum Corporation | Corpus Chrsti, TX 78427 | Oil & Gas Operator | Sep 2026 |
| 18 | Riseden Services, Inc. | Houston, TX 77256 | Oil & Gas Operator | Sep 1997 |
| 19 | Rlu Operating, LLC | Devine, TX 78016 | Oil & Gas Operator | Sep 2026 |
| 20 | Rme Petroleum Company | Houston, TX 77251 | Oil & Gas Operator | Nov 2016 |
| 21 | Rodeo Resources, L.L.C. | Houston, TX 77079 | Oil & Gas Operator | Dec 2024 |
| 22 | Rodessa Operating Company | Corpus Chrsti, TX 78426 | Oil & Gas Operator | Sep 2026 |
| 23 | Roil Production Company | Houston, TX 77056 | Gas Operator | Sep 2005 |
| 24 | Rosenthal, Stanley H. | Bay City, TX 77404 | Oil & Gas Operator | Dec 2020 |
| 25 | Roule Production Company | Bay City, TX 77414 | Oil & Gas Operator | Feb 1997 |
| 26 | Royalty Land & Dev. Co., Inc. | Wolfforth, TX 79382 | Oil & Gas Operator | Sep 2026 |
| 27 | Rse, Inc. | Houston, TX 77077 | Oil & Gas Operator | Sep 2000 |
| 28 | Rudman Partnership, The | Dallas, TX 75201 | Oil & Gas Operator | Dec 2014 |
| 29 | Rumble Energy LLC | Skiatook, OK 74070 | Oil & Gas Operator | Sep 2026 |
| 30 | Rusk Energy Operating LLC | Houston, TX 77040 | Oil & Gas Operator | Sep 2026 |