| 1 | Redmon Oil Company, Inc., The | Plano, TX 75023 | Oil & Gas Operator | Oct 2025 |
| 2 | Reh Energy, Inc. | Corpus Chrsti, TX 78413 | Oil & Gas Operator | Oct 2025 |
| 3 | Reichmann Petroleum Corp. | Grapevine, TX 76051 | Oil & Gas Operator | Oct 2025 |
| 4 | Remora Management, LLC | The Woodlands, TX 77382 | Oil & Gas Operator | Oct 2025 |
| 5 | Republic Resources, LLC. | San Antonio, TX 78212 | Oil & Gas Operator | Oct 2025 |
| 6 | Reserve Operating Corp. | Houston, TX 77040 | Oil & Gas Operator | Oct 2025 |
| 7 | Richman Petroleum Corp. | Grapevine, TX 76051 | Oil & Gas Operator | Jul 2006 |
| 8 | Rife Oil Properties Inc | Fort Worth, TX 76107 | Oil & Gas Operator | Oct 2025 |
| 9 | Riley Exploration, LLC | Blanchard, OK 73010 | Oil & Gas Operator | Oct 2025 |
| 10 | Rincon Petroleum Corporation | Corpus Chrsti, TX 78427 | Oil & Gas Operator | Oct 2025 |
| 11 | Rio Exploration Company | San Antonio, TX 78209 | Gas Operator | Dec 2005 |
| 12 | Rio Grande Drilling Company | San Antonio, TX 78212 | Oil & Gas Operator | Dec 1999 |
| 13 | Ritchie, H. G. Jr. | Taft, TX 78390 | Oil & Gas Operator | Oct 2025 |
| 14 | Rodessa Operating Company | Corpus Chrsti, TX 78426 | Oil & Gas Operator | Oct 2025 |
| 15 | Roma Oil And Gas, Inc. | San Antonio, TX 78209 | Oil & Gas Operator | Oct 2025 |
| 16 | Ross Gas And Oil, LTD. Co. | Dripping SPGS, TX 78620 | Oil & Gas Operator | Oct 2025 |
| 17 | Royal Oil & Gas Corp. | Indiana, PA 15701 | Oil & Gas Operator | Apr 2014 |
| 18 | Royal Production Company, Inc. | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Oct 2025 |
| 19 | Royko Oil Company | Horseshoe Bay, TX 78657 | Oil & Gas Operator | Oct 2025 |