| 1 | R K Petroleum Corp. | Midland, TX 79708 | Oil & Gas Operator | May 2024 |
| 2 | Rand Oil & Gas Corp. | Houston, TX 77040 | Oil & Gas Operator | Mar 2025 |
| 3 | Ranger 40 Petroleum, LLC | Fairfield, CT 06824 | Oil & Gas Operator | Mar 2025 |
| 4 | Rattler Midstream Operating LLC | Midland, TX 79701 | Oil Operator | Mar 2025 |
| 5 | Raw Production | Kermit, TX 79745 | Oil & Gas Operator | Mar 2025 |
| 6 | Ray Oil Company | Dallas, TX 75370 | Oil Operator | Dec 1989 |
| 7 | Rayden | Midland, TX 79711 | Oil & Gas Operator | Mar 2025 |
| 8 | RBJ & Associates, LP | Midland, TX 79707 | Oil Operator | Jan 2020 |
| 9 | RCS Drilling Company, Inc. | Midland, TX 79702 | Oil & Gas Operator | Jul 1994 |
| 10 | Re-Op Corp. | Houston, TX 77274 | Oil & Gas Operator | Mar 2025 |
| 11 | Reatta Energy, Inc. | Midland, TX 79702 | Oil & Gas Operator | Mar 2025 |
| 12 | Recovery Operating LP | San Angelo, TX 76904 | Oil & Gas Operator | Mar 2025 |
| 13 | Red Willow Production, LLC | Ignacio, CO 81137 | Oil & Gas Operator | Oct 2015 |
| 14 | Reef Exploration, L.P. | Richardson, TX 75080 | Oil & Gas Operator | Mar 2025 |
| 15 | Reeves County Systems, Inc. | Odessa, TX 79760 | Oil & Gas Operator | Aug 2019 |
| 16 | Rein Pusher Operating LLC | Brenham, TX 77834 | Oil & Gas Operator | Mar 2025 |
| 17 | Remnant Oil Operating, LLC | Midland, TX 79704 | Oil & Gas Operator | Jul 2024 |
| 18 | Remuda Operating Company | Midland, TX 79711 | Oil & Gas Operator | Mar 2025 |
| 19 | Resolute Natural Res. Co., LLC | Midland, TX 79706 | Oil & Gas Operator | Mar 2025 |
| 20 | Resolute Natural Resources Co., LLC | Denver, CO 80203 | Oil & Gas Operator | Feb 2017 |
| 21 | Rhonda Operating Company | Midland, TX 79710 | Oil & Gas Operator | Aug 2017 |
| 22 | Riata Energy Inc | Oklahoma City, OK 73101 | Oil & Gas Operator | Apr 2008 |
| 23 | Richardson, Bud II | Graham, TX 76450 | Oil & Gas Operator | Mar 2025 |
| 24 | Ring Energy, Inc. | Midland, TX 79702 | Oil & Gas Operator | Mar 2025 |
| 25 | Rio Oil And Gas (Permian) II,LLC | The Woodlands, TX 77382 | Oil & Gas Operator | Nov 2024 |
| 26 | Rio Petroleum, Inc. | Amarillo, TX 79102 | Oil & Gas Operator | Mar 2025 |
| 27 | Rio-Tex, Inc. | San Antonio, TX 78217 | Oil & Gas Operator | Mar 2025 |
| 28 | Rittenhouse Oil & Gas Co. | Midland, TX 79702 | Oil & Gas Operator | Mar 2025 |
| 29 | Rki Exploration & Production LLC | Tulsa, OK 74172 | Oil & Gas Operator | Mar 2025 |
| 30 | Roanoke Corporation | Fort Worth, TX 76102 | Oil & Gas Operator | Oct 1995 |
| 31 | Robertson Resources, Inc. | Midland, TX 79708 | Oil & Gas Operator | Mar 2025 |
| 32 | Roca Resource Company, Inc. | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 33 | Rockbridge Petroleum LLC | Houston, TX 77057 | Oil & Gas Operator | Dec 2009 |
| 34 | Rockport Energy Solutions LLC | Austin, TX 78730 | Oil & Gas Operator | Mar 2025 |
| 35 | Roosth Production Co. | Tyler, TX 75711 | Oil & Gas Operator | Mar 2025 |
| 36 | Rosetta Resources Operating LP | San Antonio, TX 78216 | Oil & Gas Operator | Mar 2025 |
| 37 | Rosewood Resources, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Mar 2025 |
| 38 | Rover Petroleum Operating, LLC | Plano, TX 75075 | Oil & Gas Operator | Mar 2025 |
| 39 | Roxanna Oil Company | Oklahoma City, OK 73120-2717 | Oil Operator | Aug 2016 |
| 40 | Royalty Operating, Inc. | Richardson, TX 75081 | Oil & Gas Operator | Nov 2007 |
| 41 | Rrig Exploration, LLC | Fort Worth, TX 76147 | Oil & Gas Operator | Mar 2025 |
| 42 | Rubicon Oil & Gas, LLC | Midland, TX 79701 | Oil & Gas Operator | Mar 2025 |
| 43 | Ruwco Oil And Gas Corp. | Austin, TX 78701 | Oil & Gas Operator | Aug 2021 |