| 1 | R K Petroleum Corp. | Midland, TX 79708 | Oil & Gas Operator | May 2024 |
| 2 | R. B. Oil Company | Monahans, TX 79756 | Oil & Gas Operator | Nov 1996 |
| 3 | Rad Oil Company | Snyder, TX 79549 | Oil & Gas Operator | Oct 2025 |
| 4 | Raider Oil & Gas Company | MC Camey, TX 79752 | Oil & Gas Operator | Oct 2025 |
| 5 | Ram Energy LLC | Tulsa, OK 74152 | Oil & Gas Operator | Jun 2025 |
| 6 | Ram Operating Company, Inc. | Houston, TX 77002 | Oil & Gas Operator | Sep 2012 |
| 7 | Ram Operating Inc. | Browns, IL 62818 | Oil & Gas Operator | Aug 2008 |
| 8 | Rampart Petroleum, Incorporated | Buffalo Gap, TX 79508 | Oil & Gas Operator | Jan 2009 |
| 9 | Ramtex Energy LLC | Tulsa, OK 74114 | Oil & Gas Operator | Oct 2025 |
| 10 | Ranger 40 Petroleum, LLC | Fairfield, CT 06824 | Oil & Gas Operator | Oct 2025 |
| 11 | Rasmussen, Tom | San Angelo, TX 76904 | Oil & Gas Operator | Oct 2025 |
| 12 | Rattler Midstream Operating LLC | Midland, TX 79701 | Oil Operator | Oct 2025 |
| 13 | Ratts, Robert V. Inc. | Bedford, TX 76021 | Oil & Gas Operator | Aug 2003 |
| 14 | Raw Oil & Gas, Inc. | Lubbock, TX 79401 | Oil & Gas Operator | Oct 2025 |
| 15 | Raw Production | Kermit, TX 79745 | Oil & Gas Operator | Oct 2025 |
| 16 | Rayden | Midland, TX 79711 | Oil & Gas Operator | Oct 2025 |
| 17 | RBD-Shelby Agency | Dallas, TX 75283 | Oil & Gas Operator | Dec 1993 |
| 18 | Reata Resources | Kermit, TX 79745 | Oil & Gas Operator | Sep 2007 |
| 19 | Red Willow Production, LLC | Ignacio, CO 81137 | Oil & Gas Operator | Oct 2015 |
| 20 | Rein Pusher Operating LLC | Brenham, TX 77834 | Oil & Gas Operator | Oct 2025 |
| 21 | Remnant Oil Operating, LLC | Midland, TX 79704 | Oil & Gas Operator | Jul 2024 |
| 22 | Remuda Operating Company | Midland, TX 79711 | Oil & Gas Operator | Oct 2025 |
| 23 | Reo Operating LLC | Austin, TX 78747 | Oil & Gas Operator | Oct 2025 |
| 24 | Resaca Operating Company | Houston, TX 77010 | Oil & Gas Operator | Sep 2013 |
| 25 | Resource Operating Company | Abilene, TX 79601 | Oil & Gas Operator | Jul 1997 |
| 26 | Restore Operating LLC | Andrews, TX 79714 | Oil & Gas Operator | Oct 2025 |
| 27 | Rhombus Operating Co., LTD | Littleton, CO 80160 | Oil & Gas Operator | Jun 2025 |
| 28 | Rhonda Operating Company | Midland, TX 79710 | Oil & Gas Operator | Aug 2017 |
| 29 | Riata Energy Inc | Oklahoma City, OK 73101 | Oil & Gas Operator | Apr 2008 |
| 30 | Richardson, Bud II | Graham, TX 76450 | Oil & Gas Operator | Oct 2025 |
| 31 | Ridge Petroleum Inc. | Tyler, TX 75701 | Oil & Gas Operator | Oct 2025 |
| 32 | Ring Energy, Inc. | Midland, TX 79702 | Oil & Gas Operator | Oct 2025 |
| 33 | Rki Exploration & Production LLC | Tulsa, OK 74172 | Oil & Gas Operator | Oct 2025 |
| 34 | Robertson Resources, Inc. | Horseshoe Bay, TX 78657 | Oil & Gas Operator | Oct 2025 |
| 35 | Roc Operating, Inc. | Plano, TX 75093 | Oil & Gas Operator | Oct 2008 |
| 36 | Roca Operating, Inc. | Midland, TX 79702 | Oil & Gas Operator | Oct 2025 |
| 37 | Rockland Oil Company | Addison, TX 75001 | Oil & Gas Operator | Jun 2025 |
| 38 | Rodan, Inc. | Wink, TX 79789 | Oil & Gas Operator | Oct 2025 |
| 39 | Roden Oil Company | Midland, TX 79702 | Oil & Gas Operator | Feb 2008 |
| 40 | Roswell Operating, LLC | Midland, TX 79702 | Oil & Gas Operator | Oct 2019 |
| 41 | Rover Operating Inc | Richardson, TX 75080 | Oil & Gas Operator | Apr 2000 |
| 42 | Roy Jackson Energy Operating, LLC | Midland, TX 79701 | Oil & Gas Operator | Oct 2025 |
| 43 | Royal Oil LTD. Co. | Hobbs, NM 88241 | Oil & Gas Operator | Mar 1996 |
| 44 | RSP Permian, LLC | Midland, TX 79701 | Oil & Gas Operator | Jul 2018 |
| 45 | Ruckus Energy Operating, LLC | San Antonio, TX 78257 | Oil & Gas Operator | Oct 2025 |
| 46 | Rust Oil Corp. | Fort Worth, TX 76108 | Oil & Gas Operator | Oct 2025 |