| 1 | R & R Oil & Gas LLC | Big Spring, TX 79720 | Oil & Gas Operator | Dec 2023 |
| 2 | R K Petroleum Corp. | Midland, TX 79708 | Oil & Gas Operator | Apr 2024 |
| 3 | R&R Resources Corporation | Houston, TX 77056 | Oil & Gas Operator | Dec 2015 |
| 4 | R. K. G. Engineering, Inc. | Odessa, TX 79760 | Oil & Gas Operator | Apr 2024 |
| 5 | Radtke, D.E. & Associates, Inc. | Midland, TX 79710 | Oil & Gas Operator | May 2004 |
| 6 | Ram Operating Inc. | Browns, IL 62818 | Oil & Gas Operator | Aug 2008 |
| 7 | Ramtex Energy LLC | Tulsa, OK 74152 | Oil & Gas Operator | Apr 2024 |
| 8 | Rand Oil & Gas Corp. | Houston, TX 77040 | Oil & Gas Operator | Apr 2024 |
| 9 | Ranger Operating Co. | Graham, TX 76450 | Oil & Gas Operator | Apr 2024 |
| 10 | Rattler Midstream Operating LLC | Midland, TX 79701 | Oil Operator | Apr 2024 |
| 11 | RBJ & Associates, LP | Midland, TX 79707 | Oil Operator | Jan 2020 |
| 12 | RCW Oil Company | Forsan, TX 79733 | Oil & Gas Operator | Mar 2019 |
| 13 | Reatta Energy, Inc. | Midland, TX 79702 | Oil & Gas Operator | Apr 2024 |
| 14 | Reef Exploration, Inc. (A-1) | Richardson, TX 75080 | Oil & Gas Operator | Oct 2006 |
| 15 | Regions Operating, LLC | Midland, TX 79702 | Oil & Gas Operator | Apr 2024 |
| 16 | Reliance Energy, Inc. | Midland, TX 79701 | Oil & Gas Operator | Apr 2024 |
| 17 | Remuda Operating Company | Midland, TX 79711 | Oil & Gas Operator | Apr 2024 |
| 18 | Resolute Natural Res. Co., LLC | Midland, TX 79706 | Oil & Gas Operator | Apr 2024 |
| 19 | Rim Operating, Inc. | Englewood, CO 80112 | Oil & Gas Operator | Apr 2024 |
| 20 | Rising Star Energy, L.L.C. | Dallas, TX 75219 | Oil & Gas Operator | Aug 2006 |
| 21 | Rising Star Petroleum, L.L.C. | Dallas, TX 75219 | Oil & Gas Operator | Apr 2010 |
| 22 | Rittenhouse Oil & Gas Co. | Midland, TX 79702 | Oil & Gas Operator | Apr 2024 |
| 23 | RMB Operating LLC | Houston, TX 77269 | Oil & Gas Operator | Apr 2024 |
| 24 | Rock Fish Operating LLC | Ackerly, TX 79713 | Oil & Gas Operator | Apr 2024 |
| 25 | Roff Operating Company LLC | Houston, TX 77002 | Oil & Gas Operator | Apr 2024 |
| 26 | Rosewood Resources, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Apr 2024 |
| 27 | RSP Permian, LLC | Midland, TX 79701 | Oil & Gas Operator | Jul 2018 |
| 28 | Rusk Co. Well Service Co., Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2024 |