| 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 | Oct 2025 |
| 3 | Rad Oil Company | Snyder, TX 79549 | Oil & Gas Operator | Oct 2025 |
| 4 | Ram Operating Company, Inc. | Houston, TX 77002 | Oil & Gas Operator | Sep 2012 |
| 5 | Ram Operating Inc. | Browns, IL 62818 | Oil & Gas Operator | Aug 2008 |
| 6 | Ramtex Energy LLC | Tulsa, OK 74114 | Oil & Gas Operator | Oct 2025 |
| 7 | Range Production Company | Fort Worth, TX 76102 | Oil & Gas Operator | Sep 2021 |
| 8 | Range Production Company, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Jul 2025 |
| 9 | Rasmussen, Hal J. Operating, Inc | Midland, TX 79701 | Oil & Gas Operator | Apr 2009 |
| 10 | Rasmussen, Tom | San Angelo, TX 76904 | Oil & Gas Operator | Oct 2025 |
| 11 | Rayden | Midland, TX 79711 | Oil & Gas Operator | Oct 2025 |
| 12 | Reatta Energy, Inc. | Midland, TX 79702 | Oil & Gas Operator | Oct 2025 |
| 13 | Recovery Operating LP | San Angelo, TX 76904 | Oil & Gas Operator | Oct 2025 |
| 14 | Red Oak Energy Co | San Angelo, TX 76906 | Oil & Gas Operator | Oct 2025 |
| 15 | Red Stag Energy, LLC | Ozona, TX 76943 | Oil & Gas Operator | Jan 2022 |
| 16 | Red Stag Operating, LLC | Ozona, TX 76943 | Oil & Gas Operator | Oct 2025 |
| 17 | Red Tank Resources, LLC | Dallas, TX 75379 | Oil & Gas Operator | Oct 2025 |
| 18 | Redstone Oil & Gas Company | Dallas, TX 75225 | Oil & Gas Operator | Jan 2020 |
| 19 | Regal Development Inc. | Eldorado, TX 76936 | Gas Operator | Jul 1996 |
| 20 | Regal Petroleum Services | Euless, TX 76039 | Oil & Gas Operator | Aug 2002 |
| 21 | Regency Petroleum Co. Of New Mex | Coppell, TX 75019 | Oil & Gas Operator | Apr 2008 |
| 22 | Rein Pusher Operating LLC | Brenham, TX 77834 | Oil & Gas Operator | Oct 2025 |
| 23 | Reliance Energy, Inc. | Midland, TX 79701 | Oil & Gas Operator | Oct 2025 |
| 24 | Reliance Operating Company | Midland, TX 79702 | Oil & Gas Operator | Feb 2000 |
| 25 | Remnant Oil Operating, LLC | Midland, TX 79704 | Oil & Gas Operator | Jul 2024 |
| 26 | Remuda Operating Company | Midland, TX 79711 | Oil & Gas Operator | Oct 2025 |
| 27 | Rendova Oil Company, Inc. | Midland, TX 79702 | Oil & Gas Operator | Oct 2002 |
| 28 | Reverence Operating LLC | Odessa, TX 79768 | Oil & Gas Operator | Oct 2025 |
| 29 | Rhombus Operating Co., LTD | Littleton, CO 80160 | Oil & Gas Operator | Jun 2025 |
| 30 | Rhonda Operating Company | Midland, TX 79710 | Oil & Gas Operator | Aug 2017 |
| 31 | RHR Oil & Gas, LLC | Fort Worth, TX 76107 | Oil Operator | Oct 2025 |
| 32 | Rhyne, J.V. | Cisco, TX 76437 | Oil & Gas Operator | Oct 2025 |
| 33 | Riata Energy Inc | Oklahoma City, OK 73101 | Oil & Gas Operator | Apr 2008 |
| 34 | Richardson Operating Company | Denver, CO 80237 | Oil & Gas Operator | Jul 2025 |
| 35 | Richardson, Bud II | Graham, TX 76450 | Oil & Gas Operator | Oct 2025 |
| 36 | Ricks Expl Acquisition Corp | Oklahoma City, OK 73102 | Oil & Gas Operator | Jan 2004 |
| 37 | Ricks Expl Acquisition LLC | Midland, TX 79701 | Oil & Gas Operator | Aug 2013 |
| 38 | Ricks Exploration, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Mar 2008 |
| 39 | Ridgeline Resources, LLC | Midland, TX 79702 | Oil & Gas Operator | Oct 2025 |
| 40 | Rim Operating, Inc. | Englewood, CO 80112 | Oil & Gas Operator | Oct 2025 |
| 41 | Rimrock Production Inc. | Giddings, TX 78942 | Oil & Gas Operator | Oct 2025 |
| 42 | Rio Blanco Energy, Inc. | Littleton, CO 80121 | Oil & Gas Operator | Oct 2002 |
| 43 | Rio-Tex, Inc. | San Antonio, TX 78217 | Oil & Gas Operator | Oct 2025 |
| 44 | Rising Star Energy, L.L.C. | Dallas, TX 75219 | Oil & Gas Operator | Aug 2006 |
| 45 | RMB Operating LLC | Lubbock, TX 79493 | Oil & Gas Operator | Oct 2025 |
| 46 | Rme Petroleum Company | Houston, TX 77251 | Oil & Gas Operator | Nov 2016 |
| 47 | Roberts & Hammack, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Oct 2025 |
| 48 | Robertson Resources, Inc. | Horseshoe Bay, TX 78657 | Oil & Gas Operator | Oct 2025 |
| 49 | Roc Energy, Inc. | Midland, TX 79710 | Oil & Gas Operator | Feb 2013 |
| 50 | Roc Operating, Inc. | Plano, TX 75093 | Oil & Gas Operator | Oct 2008 |
| 51 | Roca Operating, Inc. | Midland, TX 79702 | Oil & Gas Operator | Oct 2025 |
| 52 | Roca Resource Company, Inc. | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 53 | Rocanville Corporation | Dallas, TX 75225 | Oil & Gas Operator | Dec 2016 |
| 54 | Rodessa Operating Company | Corpus Chrsti, TX 78426 | Oil & Gas Operator | Oct 2025 |
| 55 | Rodman Petroleum Corp. | Odessa, TX 79768 | Oil & Gas Operator | Jul 2023 |
| 56 | Romine Oil & Gas, LLC | Midland, TX 79710 | Oil & Gas Operator | Oct 2025 |
| 57 | Rosewood Resources, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Oct 2025 |
| 58 | Rowland, Rex D. | Midland, TX 79701 | Oil & Gas Operator | Dec 2017 |
| 59 | Rowland, Rex D. Estate Of | Dallas, TX 75252 | Oil & Gas Operator | Oct 2025 |
| 60 | Rozzlle Operating Company, LLC | Blackwell, TX 79506 | Oil & Gas Operator | Oct 2025 |
| 61 | RRP Operating LLC | Houston, TX 77046 | Oil & Gas Operator | Oct 2025 |
| 62 | Rudman Partnership, The | Dallas, TX 75201 | Oil & Gas Operator | Dec 2014 |
| 63 | Russell Operating Company, LLC | Big Lake, TX 76932 | Oil Operator | Oct 2025 |
| 64 | Ruwco Oil And Gas Corp. | Austin, TX 78701 | Oil & Gas Operator | Aug 2021 |