| 1 | R K Petroleum Corp. | Midland, TX 79708 | Oil & Gas Operator | May 2024 |
| 2 | R. K. G. Engineering, Inc. | Odessa, TX 79760 | Oil & Gas Operator | Sep 2026 |
| 3 | Rad Oil Company | Snyder, TX 79549 | Oil & Gas Operator | Sep 2026 |
| 4 | Ram Operating Inc. | Browns, IL 62818 | Oil & Gas Operator | Aug 2008 |
| 5 | Rand - Paulson Oil Company, Inc. | Houston, TX 77063 | Oil & Gas Operator | Feb 1999 |
| 6 | Range Production Company | Fort Worth, TX 76102 | Oil & Gas Operator | Sep 2021 |
| 7 | Rasmussen, Hal J. Operating, Inc | Midland, TX 79701 | Oil & Gas Operator | Apr 2009 |
| 8 | Raw Oil & Gas, Inc. | Lubbock, TX 79401 | Oil & Gas Operator | Sep 2026 |
| 9 | Rayco Operating, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Sep 2026 |
| 10 | Rayden | Southlake, TX 76092 | Oil & Gas Operator | Sep 2026 |
| 11 | Reach Oil And Gas Company Inc | Oklahoma City, OK 73118-1100 | Oil & Gas Operator | May 2026 |
| 12 | Reatta Energy, Inc. | Midland, TX 79702 | Oil & Gas Operator | Sep 2026 |
| 13 | Red Stone Resources LLC | Edmond, OK 73013 | Oil Operator | Jun 2023 |
| 14 | Red Willow Production, LLC | Ignacio, CO 81137 | Oil & Gas Operator | Oct 2015 |
| 15 | Regal Petroleum Services | Euless, TX 76039 | Oil & Gas Operator | Aug 2002 |
| 16 | Rein Pusher Operating LLC | Brenham, TX 77834 | Oil & Gas Operator | Sep 2026 |
| 17 | Reinecke Operating, LLC | Houston, TX 77024 | Oil & Gas Operator | Nov 2018 |
| 18 | Remo, Inc. | Odessa, TX 79760 | Oil & Gas Operator | May 2003 |
| 19 | Renaud Oil Corporation | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 20 | Renwar, Inc. | Corpus Christ, TX 78411 | Gas Operator | Feb 1999 |
| 21 | Reo Operating LLC | Austin, TX 78747 | Oil & Gas Operator | Sep 2026 |
| 22 | Ricks Exploration, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Mar 2008 |
| 23 | Robert C. Brower, LLC | Southlake, TX 76092 | Oil & Gas Operator | Sep 2026 |
| 24 | Robertson Resources, Inc. | Horseshoe Bay, TX 78657 | Oil & Gas Operator | Sep 2026 |
| 25 | Rock Fish Operating LLC | McKinney, TX 75070 | Oil & Gas Operator | Sep 2026 |
| 26 | Royal Oil & Gas Corp. | Indiana, PA 15701 | Oil & Gas Operator | Apr 2014 |
| 27 | Ruwco Oil And Gas Corp. | Austin, TX 78701 | Oil & Gas Operator | Aug 2021 |