| 1 | R & R Energy, LTD. | Muenster, TX 76252 | Oil Operator | Jun 2025 |
| 2 | R&K Oil Co. | Nocona, TX 76255 | Oil & Gas Operator | Jun 2025 |
| 3 | R. & R. Exploration, Inc. | Denton, TX 76202 | Oil Operator | Nov 1993 |
| 4 | R2Q Operating LLC | Iowa Park, TX 76367 | Oil & Gas Operator | Jun 2025 |
| 5 | Ranger Operating Co. | Graham, TX 76450 | Oil & Gas Operator | Jun 2025 |
| 6 | Raven Operating Group, Inc. | Sedalia, CO 80135 | Oil & Gas Operator | Dec 2010 |
| 7 | Redman Operating Company LLC | Nocona, TX 76255 | Oil Operator | Jun 2025 |
| 8 | Reed Oil Company | Gainesville, TX 76241 | Oil & Gas Operator | Jun 2005 |
| 9 | Reed Production, Inc. | Gainesville, TX 76241 | Oil Operator | Jun 2025 |
| 10 | Regal Petroleum Services | Euless, TX 76039 | Oil & Gas Operator | Aug 2002 |
| 11 | Republic Energy Inc. | Decatur, TX 76234 | Oil & Gas Operator | Dec 2016 |
| 12 | Revier, J. B. Prod. Company | Wichita Falls, TX 76302 | Oil & Gas Operator | Apr 1996 |
| 13 | Ric Petroleum, Inc. | Wichita Falls, TX 76307 | Oil & Gas Operator | Aug 2003 |
| 14 | Richey, Ray Management Co., Inc. | Fort Worth, TX 76108 | Oil & Gas Operator | Jun 2025 |
| 15 | Rife Energy Operating, Inc. | Fort Worth, TX 76116 | Oil & Gas Operator | Jun 2025 |
| 16 | Rife Oil Properties Inc | Fort Worth, TX 76107 | Oil & Gas Operator | Jun 2025 |
| 17 | Rising Star Energy, L.L.C. | Dallas, TX 75219 | Oil & Gas Operator | Aug 2006 |
| 18 | RLS Oil Company | Tulia, TX 79088 | Oil & Gas Operator | Jun 2025 |
| 19 | Roberts & Hammack, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Jun 2025 |
| 20 | Rocanville Corporation | Dallas, TX 75225 | Oil & Gas Operator | Dec 2016 |
| 21 | Rockin C Production, L.L.C. | Nocona, TX 76255 | Oil Operator | Jun 2025 |
| 22 | Rocking, R, Drilling & Prod Co. | Bowie, TX 76230 | Oil & Gas Operator | Jun 2025 |
| 23 | Rohmer Brother'S | Muenster, TX 76252 | Oil & Gas Operator | May 2014 |
| 24 | Rohmer Resources LP | Muenster, TX 76252 | Oil Operator | Jun 2025 |
| 25 | Rohmer, Tony S. | Muenster, TX 76252 | Oil & Gas Operator | Sep 2015 |
| 26 | Rohmer, William J. | Muenster, TX 76252 | Oil & Gas Operator | Dec 2011 |
| 27 | Roil Mineral & Land Co. | Dallas, TX 75379 | Oil & Gas Operator | Jun 2025 |
| 28 | Romco | Muenster, TX 76252 | Oil & Gas Operator | Mar 2015 |
| 29 | Ropa Exploration Corp. | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2011 |
| 30 | Ropar Operating Co. | Wichita Falls, TX 76301 | Oil & Gas Operator | Jun 2025 |
| 31 | Roseland Oil & Gas Inc | Rockwall, TX 75087 | Oil & Gas Operator | Feb 2003 |
| 32 | Ross, Dwight M. DRLG. Co., Inc. | Wichita Falls, TX 76301 | Oil & Gas Operator | Jun 2025 |
| 33 | Royal Texan Resources Co. | Breckenridge, TX 76424 | Oil & Gas Operator | Jun 2025 |
| 34 | Rudman Partnership, The | Dallas, TX 75201 | Oil & Gas Operator | Dec 2014 |
| 35 | Rwa, LLC | Boyd, TX 76023 | Oil & Gas Operator | Jun 2025 |
| 36 | Ryder Scott Oil Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Dec 2005 |