| 1 | R & C Petroleum, Inc. | Flint, TX 75762 | Oil & Gas Operator | Sep 2026 |
| 2 | R & S Investments | Tulsa, OK 74146-4743 | Oil Operator | Aug 2013 |
| 3 | R. Lacy Services, LTD. | Longview, TX 75606 | Oil & Gas Operator | Sep 2026 |
| 4 | Rabalais, F.W. Inc. | Fort Worth, TX 76101 | Oil & Gas Operator | Sep 2023 |
| 5 | Range Production Company | Fort Worth, TX 76102 | Oil & Gas Operator | Sep 2021 |
| 6 | Range Production Company, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | May 2026 |
| 7 | Ratex Energy Inc. | Manchaca, TX 78652 | Oil & Gas Operator | Sep 2002 |
| 8 | RBD-Shelby Agency | Dallas, TX 75283 | Oil & Gas Operator | Dec 1993 |
| 9 | Red Hills Energy, LLC | Medicine Lodge, KS 67104 | Oil & Gas Operator | Apr 2026 |
| 10 | Redmon Oil Company, Inc., The | Plano, TX 75023 | Oil & Gas Operator | Sep 2026 |
| 11 | Redstone Oil & Gas Company | Dallas, TX 75225 | Oil & Gas Operator | Jan 2020 |
| 12 | Reef Exploration, Inc. (A-1) | Richardson, TX 75080 | Oil & Gas Operator | Oct 2006 |
| 13 | Remuda Operating Company | Midland, TX 79711 | Oil & Gas Operator | Sep 2026 |
| 14 | Resaca Resources, L.L.C. | Austin, TX 78746 | Oil & Gas Operator | Sep 2026 |
| 15 | Reserve Management, Inc. | Tyler, TX 75711 | Oil & Gas Operator | Sep 2026 |
| 16 | Resource America Inc | Uniontown, OH 44685 | Oil & Gas Operator | Dec 2011 |
| 17 | Resource Energy Inc | Uniontown, OH 44685 | Gas Operator | Dec 2007 |
| 18 | Ress Production Co. | Farmington, NM 87499 | Oil & Gas Operator | Mar 2026 |
| 19 | Revilo Exploration, Inc. | Richardson, TX 75081 | Oil & Gas Operator | Jul 2021 |
| 20 | Reynolds Drilling Co., Inc. | Shreveport, LA 71105 | Oil & Gas Operator | Sep 2026 |
| 21 | Reynolds E & P, Inc. | Shreveport, LA 71105 | Oil & Gas Operator | Sep 2026 |
| 22 | Rfe Operating, LLC | Tyler, TX 75703 | Oil & Gas Operator | Sep 2026 |
| 23 | Richey Operating, Inc. | Tyler, TX 75711 | Oil & Gas Operator | Sep 2026 |
| 24 | Richey Properties, Inc. | Tyler, TX 75711 | Oil & Gas Operator | Sep 2026 |
| 25 | Rippy Oil Company | Tyler, TX 75702 | Oil & Gas Operator | Sep 2026 |
| 26 | Riverstone Energy Operating, LLC | Houston, TX 77090 | Oil & Gas Operator | Sep 2026 |
| 27 | Rme Petroleum Company | Houston, TX 77251 | Oil & Gas Operator | Nov 2016 |
| 28 | Roberts & Murphy, Inc. | Shreveport, LA 71137 | Oil & Gas Operator | Apr 2016 |
| 29 | Rockcliff Energy Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Sep 2026 |
| 30 | Rodessa Management, Inc. | Longview, TX 75606 | Oil & Gas Operator | May 1995 |
| 31 | Rojo Burro Petroleo & Gas | Kilgore, TX 75662 | Oil & Gas Operator | Aug 2007 |
| 32 | Roosth & Genecov Production Co. | Tyler, TX 75710 | Oil & Gas Operator | Aug 2003 |
| 33 | Roosth Production Co. | Tyler, TX 75711 | Oil & Gas Operator | Sep 2026 |
| 34 | Rosbottom Production Corp | Shreveport, LA 71134 | Oil & Gas Operator | Dec 2017 |
| 35 | Rusk Co. Well Service Co., Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Sep 2026 |
| 36 | Rusk Energy Management, LLC | Houston, TX 77002 | Oil & Gas Operator | Feb 2008 |