| 1 | R. & R. Exploration, Inc. | Denton, TX 76202 | Oil Operator | Nov 1993 |
| 2 | Range Production Company | Fort Worth, TX 76102 | Oil & Gas Operator | Sep 2021 |
| 3 | Ranger Operating Co. | Graham, TX 76450 | Oil & Gas Operator | Dec 2024 |
| 4 | Red River Crude Oil LLC | Houston, TX 77081 | Oil Operator | Oct 2024 |
| 5 | Reddirt Operating, LLC. | Midland, TX 79704 | Oil & Gas Operator | Dec 2024 |
| 6 | Regal Energy Operating, L.L.C. | Plano, TX 75024 | Oil & Gas Operator | Dec 2024 |
| 7 | Reichmann Petroleum Corp. | Grapevine, TX 76051 | Oil & Gas Operator | Dec 2024 |
| 8 | Remuda Operating Company | Midland, TX 79711 | Oil & Gas Operator | Dec 2024 |
| 9 | Renaissance Petroleum Co LLC | Houston, TX 77058 | Oil & Gas Operator | Nov 2011 |
| 10 | Republic Energy Inc. | Decatur, TX 76234 | Oil & Gas Operator | Dec 2016 |
| 11 | Revier, J. B. Prod. Company | Wichita Falls, TX 76302 | Oil & Gas Operator | Apr 1996 |
| 12 | Rhyne, J.V. | Cisco, TX 76437 | Oil & Gas Operator | Dec 2024 |
| 13 | Richey, Ray Management Co., Inc. | Fort Worth, TX 76108 | Oil & Gas Operator | Dec 2024 |
| 14 | Rife Energy Operating, Inc. | Fort Worth, TX 76116 | Oil & Gas Operator | Dec 2024 |
| 15 | Rife Oil Properties Inc | Fort Worth, TX 76107 | Oil & Gas Operator | Dec 2024 |
| 16 | Rimrock Energy, LLC | Fort Worth, TX 76147 | Oil & Gas Operator | Oct 2012 |
| 17 | Rivercity Operating, Inc. | Austin, TX 78766 | Oil & Gas Operator | Dec 2024 |
| 18 | RKW Operating LLC | Weatherford, TX 76085 | Gas Operator | Dec 2024 |
| 19 | Roberson, Joe | Vernon, TX 76385 | Oil & Gas Operator | Feb 2015 |
| 20 | Robinson Oil & Gas, Inc. | Chico, TX 76431 | Oil & Gas Operator | Aug 2003 |
| 21 | Roca Resource Company, Inc. | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 22 | Rock Petroleum, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Aug 2024 |
| 23 | Rodgers, William L. | Fort Worth, TX 76147 | Oil & Gas Operator | Jan 1995 |
| 24 | Roil Mineral & Land Co. | Dallas, TX 75379 | Oil & Gas Operator | Dec 2024 |
| 25 | Rollo Resources, LLC | Granbury, TX 76049 | Gas Operator | Dec 2024 |
| 26 | Ropa Exploration Corp. | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2011 |
| 27 | Ropar Operating Co. | Wichita Falls, TX 76301 | Oil & Gas Operator | Dec 2024 |
| 28 | Rose Exploration, Inc. | Dallas, TX 75231 | Oil & Gas Operator | Feb 2002 |
| 29 | Rosehill Operating Company, LLC | Houston, TX 77084 | Oil & Gas Operator | Sep 2021 |
| 30 | Roseland Oil & Gas Inc | Rockwall, TX 75087 | Oil & Gas Operator | Feb 2003 |
| 31 | Ross, Dwight M. DRLG. Co., Inc. | Wichita Falls, TX 76301 | Oil & Gas Operator | Dec 2024 |
| 32 | Routh Operating, LLC | Dallas, TX 75204 | Oil & Gas Operator | Mar 2011 |
| 33 | Rubis Oil, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Dec 2024 |
| 34 | Rudman Partnership, The | Dallas, TX 75201 | Oil & Gas Operator | Dec 2014 |
| 35 | Rwa, LLC | Boyd, TX 76023 | Oil & Gas Operator | Dec 2024 |
| 36 | Ryder Scott Management, LLC | Wichita Falls, TX 76307 | Oil & Gas Operator | Mar 2018 |
| 37 | Ryder Scott Oil Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Dec 2005 |