| 1 | R K Petroleum Corp. | Midland, TX 79708 | Oil & Gas Operator | May 2024 |
| 2 | Ram Operating Inc. | Browns, IL 62818 | Oil & Gas Operator | Aug 2008 |
| 3 | Ramtex Energy LLC | Tulsa, OK 74114 | Oil & Gas Operator | May 2026 |
| 4 | Ranger 40 Petroleum, LLC | Fairfield, CT 06824 | Oil & Gas Operator | May 2026 |
| 5 | Rattler Midstream Operating LLC | Midland, TX 79701 | Oil Operator | May 2026 |
| 6 | Rayden | Southlake, TX 76092 | Oil & Gas Operator | May 2026 |
| 7 | RBJ & Associates, LP | Midland, TX 79707 | Oil Operator | Jan 2020 |
| 8 | Reach Oil And Gas Company Inc | Oklahoma City, OK 73118-1100 | Oil & Gas Operator | Feb 2026 |
| 9 | Reatta Energy, Inc. | Midland, TX 79702 | Oil & Gas Operator | May 2026 |
| 10 | Red Stone Resources LLC | Edmond, OK 73013 | Oil Operator | Jun 2023 |
| 11 | Red Tail Exploration, LLC | Midland, TX 79702 | Oil & Gas Operator | May 2026 |
| 12 | Regent Oil & Gas Company, L.P. | Dallas, TX 75225 | Oil & Gas Operator | Sep 2006 |
| 13 | Regions Energy LLC | Midland, TX 79702 | Oil & Gas Operator | Sep 2016 |
| 14 | Regions Operating, LLC | Midland, TX 79702 | Oil & Gas Operator | May 2024 |
| 15 | Remo, Inc. | Odessa, TX 79760 | Oil & Gas Operator | May 2003 |
| 16 | Rendova Oil Company, Inc. | Midland, TX 79702 | Oil & Gas Operator | Oct 2002 |
| 17 | Resolute Natural Res. Co., LLC | Midland, TX 79706 | Oil & Gas Operator | May 2026 |
| 18 | Reverence Operating LLC | Odessa, TX 79768 | Oil & Gas Operator | May 2026 |
| 19 | Rex Energy Operating Corp. | State College, PA 16801 | Oil & Gas Operator | Jun 2012 |
| 20 | Ricks Exploration, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Mar 2008 |
| 21 | Rim Operating, Inc. | Englewood, CO 80112 | Oil & Gas Operator | May 2026 |
| 22 | Rio Oil And Gas (Permian) II,LLC | The Woodlands, TX 77382 | Oil & Gas Operator | Nov 2024 |
| 23 | Rising Star Energy, L.L.C. | Dallas, TX 75219 | Oil & Gas Operator | Aug 2006 |
| 24 | Rittenhouse Oil & Gas Co. | Midland, TX 79702 | Oil & Gas Operator | May 2026 |
| 25 | Rki Exploration & Production LLC | Tulsa, OK 74172 | Oil & Gas Operator | May 2026 |
| 26 | Rme Petroleum Company | Houston, TX 77251 | Oil & Gas Operator | Nov 2016 |
| 27 | Roberts & Hammack, Inc. | Dallas, TX 75206 | Oil & Gas Operator | May 2026 |
| 28 | Robertson Resources, Inc. | Horseshoe Bay, TX 78657 | Oil & Gas Operator | May 2026 |
| 29 | Rock Fish Operating LLC | McKinney, TX 75070 | Oil & Gas Operator | May 2026 |
| 30 | Romine Oil & Gas, LLC | Midland, TX 79710 | Oil & Gas Operator | May 2026 |
| 31 | Rosewood Resources Inc | Dallas, TX 75201 | Oil & Gas Operator | May 2026 |
| 32 | RP Operating, L.L.C. | Houston, TX 77002 | Oil & Gas Operator | May 2026 |
| 33 | RSP Permian, LLC | Midland, TX 79701 | Oil & Gas Operator | Jul 2018 |
| 34 | Rust Oil Corp. | Fort Worth, TX 76121 | Oil & Gas Operator | May 2026 |