| 1 | R & C Petroleum, Inc. | Flint, TX 75762 | Oil & Gas Operator | Mar 2025 |
| 2 | R2Q Operating LLC | Iowa Park, TX 76367 | Oil & Gas Operator | Mar 2025 |
| 3 | Radius Operating, LLC | Round Rock, TX 78664 | Oil & Gas Operator | Mar 2025 |
| 4 | Rainbow Resources, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Aug 2007 |
| 5 | Ram Operating Company, Inc. | Houston, TX 77002 | Oil & Gas Operator | Sep 2012 |
| 6 | Ramtex Energy LLC | Tulsa, OK 74114 | Oil & Gas Operator | Mar 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 | Dec 2024 |
| 9 | Ranger Investments, Inc. | Longview, TX 75605 | Oil & Gas Operator | Oct 2006 |
| 10 | RBD-Shelby Agency | Dallas, TX 75283 | Oil & Gas Operator | Dec 1993 |
| 11 | Rebel Production Company | Kilgore, TX 75663 | Oil Operator | Mar 2025 |
| 12 | Recon Oil Co. | Emory, TX 75440 | Oil & Gas Operator | Mar 2025 |
| 13 | Redwood Oil & Gas | McKinney, TX 75070 | Oil & Gas Operator | Apr 2013 |
| 14 | Regal Petroleum Services | Euless, TX 76039 | Oil & Gas Operator | Aug 2002 |
| 15 | Remuda Operating Company | Midland, TX 79711 | Oil & Gas Operator | Mar 2025 |
| 16 | Reostar Operating Incorporated | Fort Worth, TX 76107 | Oil & Gas Operator | Sep 2012 |
| 17 | Reserve Management, Inc. | Tyler, TX 75711 | Oil & Gas Operator | Mar 2025 |
| 18 | Reserve Production, Inc. | Tyler, TX 75713 | Oil & Gas Operator | Mar 2008 |
| 19 | Revilo Exploration, Inc. | Richardson, TX 75081 | Oil & Gas Operator | Jul 2021 |
| 20 | Reynolds Drilling Co., Inc. | Shreveport, LA 71105 | Oil & Gas Operator | Mar 2025 |
| 21 | Reynolds E & P, Inc. | Shreveport, LA 71105 | Oil & Gas Operator | Mar 2025 |
| 22 | Rfe Operating, LLC | Tyler, TX 75703 | Oil & Gas Operator | Mar 2025 |
| 23 | RHC Energy (USA) LLC | Houston, TX 77027 | Oil Operator | Mar 2025 |
| 24 | Rheata Resources, LLC | Kilgore, TX 75663 | Oil & Gas Operator | Mar 2025 |
| 25 | Richey Operating, Inc. | Tyler, TX 75711 | Oil & Gas Operator | Mar 2025 |
| 26 | Richey Properties, Inc. | Tyler, TX 75711 | Oil & Gas Operator | Mar 2025 |
| 27 | Rig Runner Express Inc Of Texas | Kilgore, TX 75663 | Oil & Gas Operator | May 2014 |
| 28 | Rig Runner Express, Inc. | Kilgore, TX 75662 | Oil & Gas Operator | Mar 2008 |
| 29 | Riverstone Energy Operating, LLC | Houston, TX 77090 | Oil & Gas Operator | Mar 2025 |
| 30 | RLM Energy Company Inc. | Monroe, LA 71201 | Oil & Gas Operator | Mar 2008 |
| 31 | Rme Petroleum Company | Houston, TX 77251 | Oil & Gas Operator | Nov 2016 |
| 32 | Rmor Production | Kilgore, TX 75662 | Oil Operator | Mar 2025 |
| 33 | Road Oil Sales Inc. | Tyler, TX 75711 | Oil Operator | Dec 1984 |
| 34 | Robbins Energy, Inc. | Longview, TX 75606 | Oil & Gas Operator | Sep 1994 |
| 35 | Robbins Petroleum Corp. | Longview, TX 75606 | Oil & Gas Operator | Sep 1994 |
| 36 | Robertson Resources, Inc. | Midland, TX 79708 | Oil & Gas Operator | Mar 2025 |
| 37 | Robertson-Bryce Management, LLC | Tyler, TX 75701 | Oil & Gas Operator | Mar 2025 |
| 38 | Robinett Resources Inc. | Longview, TX 75601 | Oil & Gas Operator | Dec 1999 |
| 39 | Robinson Operating Company | Abilene, TX 79604 | Oil & Gas Operator | Aug 2012 |
| 40 | Roc Operating, Inc. | Plano, TX 75093 | Oil & Gas Operator | Oct 2008 |
| 41 | Rockcliff Energy Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Mar 2025 |
| 42 | Rodessa Management, Inc. | Longview, TX 75606 | Oil & Gas Operator | May 1995 |
| 43 | Roil Mineral & Land Co. | Dallas, TX 75379 | Oil & Gas Operator | Mar 2025 |
| 44 | Rojo Burro Petroleo & Gas | Kilgore, TX 75662 | Oil & Gas Operator | Aug 2007 |
| 45 | Rollert Co., Inc., The | Luling, TX 78648 | Oil & Gas Operator | Nov 2000 |
| 46 | Roosth & Genecov Production Co. | Tyler, TX 75710 | Oil & Gas Operator | Aug 2003 |
| 47 | Roosth Production Co. | Tyler, TX 75711 | Oil & Gas Operator | Mar 2025 |
| 48 | Roseland Oil & Gas Inc | Rockwall, TX 75087 | Oil & Gas Operator | Feb 2003 |
| 49 | Rowan, Al | Van, TX 75790 | Oil & Gas Operator | Apr 2021 |
| 50 | Royal Petroleum Corp. | Dallas, TX 75229 | Oil & Gas Operator | Jan 2025 |
| 51 | RTD Resources, LLC | Arp, TX 75750 | Oil & Gas Operator | Mar 2025 |
| 52 | Rudman Partnership, The | Dallas, TX 75201 | Oil & Gas Operator | Dec 2014 |
| 53 | Rusk Co. Well Service Co., Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Mar 2025 |
| 54 | Rusk Energy Management, LLC | Houston, TX 77002 | Oil & Gas Operator | Feb 2008 |
| 55 | Rwa, LLC | Boyd, TX 76023 | Oil & Gas Operator | Mar 2025 |