| 1 | Rand - Paulson Oil Company, Inc. | Houston, TX 77063 | Oil & Gas Operator | Feb 1999 |
| 2 | Rand Energy Company | Houston, TX 77063 | Oil & Gas Operator | Oct 2025 |
| 3 | Raptor Petroleum II, LLC | Houston, TX 77251 | Oil & Gas Operator | Oct 2025 |
| 4 | Reef Exploration, Inc. (A-1) | Richardson, TX 75080 | Oil & Gas Operator | Oct 2006 |
| 5 | Remo, Inc. | Odessa, TX 79760 | Oil & Gas Operator | May 2003 |
| 6 | Remuda Operating Company | Midland, TX 79711 | Oil & Gas Operator | Oct 2025 |
| 7 | Rio Exploration Company | San Antonio, TX 78209 | Gas Operator | Dec 2005 |
| 8 | Rio Petroleum, Inc. | Amarillo, TX 79102 | Oil & Gas Operator | Oct 2025 |
| 9 | Rio-Tex, Inc. | San Antonio, TX 78217 | Oil & Gas Operator | Oct 2025 |
| 10 | Robertson Resources, Inc. | Horseshoe Bay, TX 78657 | Oil & Gas Operator | Oct 2025 |
| 11 | Robertson-Bryce Management, LLC | Tyler, TX 75701 | Oil & Gas Operator | Oct 2025 |
| 12 | Rocker A Operating Company | Post, TX 79356 | Oil & Gas Operator | Aug 2022 |
| 13 | Roco Petroleum, Incorporated | Abilene, TX 79605 | Oil & Gas Operator | Oct 2025 |
| 14 | Rose Exploration, Inc. | Dallas, TX 75231 | Oil & Gas Operator | Feb 2002 |
| 15 | Rover Petroleum Operating, LLC | Fort Worth, TX 76101 | Oil & Gas Operator | Oct 2025 |