| 1 | R & S Energy Company | Luling, TX 78648 | Oil & Gas Operator | Dec 2010 |
| 2 | Ragars Oil & Gas Co. | Austin, TX 78716 | Oil & Gas Operator | Mar 2025 |
| 3 | Ramtex Energy LLC | Tulsa, OK 74114 | Oil & Gas Operator | Mar 2025 |
| 4 | Rana Energy Company | Spring, TX 77387 | Oil & Gas Operator | Mar 2008 |
| 5 | Range Production Company | Fort Worth, TX 76102 | Oil & Gas Operator | Sep 2021 |
| 6 | Rawhide Operating, Inc. | New Braunfels, TX 78131 | Oil & Gas Operator | Mar 2025 |
| 7 | Ray Loveless Enterprises, L.L.C. | Kilgore, TX 75663 | Oil Operator | Mar 2025 |
| 8 | Red Fork Production, LLC | San Antonio, TX 78217 | Oil & Gas Operator | Nov 2024 |
| 9 | Redwood Operating, Inc. | Houston, TX 77058 | Oil & Gas Operator | Mar 2025 |
| 10 | Reef Exploration, Inc. (A-1) | Richardson, TX 75080 | Oil & Gas Operator | Oct 2006 |
| 11 | Reef Exploration, L.P. | Richardson, TX 75080 | Oil & Gas Operator | Mar 2025 |
| 12 | Remora Management, LLC | The Woodlands, TX 77382 | Oil & Gas Operator | Mar 2025 |
| 13 | Reo Operating LLC | Austin, TX 78747 | Oil & Gas Operator | Mar 2025 |
| 14 | Republic Resources, LLC. | San Antonio, TX 78212 | Oil & Gas Operator | Mar 2025 |
| 15 | Resaca Resources, L.L.C. | Austin, TX 78746 | Oil & Gas Operator | Mar 2025 |
| 16 | Rfe Operating, LLC | Tyler, TX 75703 | Oil & Gas Operator | Mar 2025 |
| 17 | Richardson Operating Company | Denver, CO 80237 | Oil & Gas Operator | Nov 2024 |
| 18 | Richardson, Marshall T. | Midfield, TX 77458 | Oil & Gas Operator | Mar 2025 |
| 19 | Riddle Engineering Corp. | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Jul 2011 |
| 20 | Rincon Petroleum Corporation | Corpus Chrsti, TX 78427 | Oil & Gas Operator | Mar 2025 |
| 21 | Rio Bravo Oil Company | The Woodlands, TX 77381 | Oil & Gas Operator | Feb 2002 |
| 22 | Rise Petroleum Investments LLC | Tomball, TX 77377 | Oil & Gas Operator | Mar 2025 |
| 23 | Rocc Oil & Gas, L.P. | Houston, TX 77084 | Oil & Gas Operator | Apr 2024 |
| 24 | Rocc Operating, LLC | Houston, TX 77084 | Oil & Gas Operator | Mar 2025 |
| 25 | Rockoil Energy Of Texas, Inc. | Weatherford, TX 76086 | Oil & Gas Operator | Mar 2025 |
| 26 | Rocky Creek Resources, LLC | Houston, TX 77055 | Oil & Gas Operator | Mar 2025 |
| 27 | Rosewood Resources, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Mar 2025 |
| 28 | Rotation, Incorporated | Houston, TX 77057 | Oil & Gas Operator | Mar 2023 |
| 29 | Royal Production Company, Inc. | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Mar 2025 |
| 30 | Rudman Partnership, The | Dallas, TX 75201 | Oil & Gas Operator | Dec 2014 |