| 1 | R & C Petroleum, Inc. | Flint, TX 75762 | Oil & Gas Operator | Apr 2024 |
| 2 | R&R Resources Corporation | Houston, TX 77056 | Oil & Gas Operator | Dec 2015 |
| 3 | Ramrod Oil And Gas (U.S.A.) Inc. | Corpus Chrsti, TX 78403 | Oil & Gas Operator | Apr 2024 |
| 4 | Ramtex Energy LLC | Tulsa, OK 74152 | Oil & Gas Operator | Apr 2024 |
| 5 | Range Production Company | Fort Worth, TX 76102 | Oil & Gas Operator | Sep 2021 |
| 6 | Rathburn Land & Devel, Inc. | Giddings, TX 78942 | Oil & Gas Operator | Aug 2003 |
| 7 | Rci, L.L.C. | Abilene, TX 79606 | Oil & Gas Operator | Apr 2024 |
| 8 | Red River Oil & Gas LLC | Cherry Hills, CO 80110 | Oil & Gas Operator | Feb 2024 |
| 9 | Red Water Resources, Inc. | Tulsa, OK 74159 | Oil & Gas Operator | Apr 2024 |
| 10 | Redstone Operating, Inc. | Austin, TX 78734 | Oil & Gas Operator | Jan 2015 |
| 11 | Redwood Energy, Inc. | Giddings, TX 78942 | Oil & Gas Operator | Jul 1997 |
| 12 | Reserve Production, Inc. | Tyler, TX 75713 | Oil & Gas Operator | Mar 2008 |
| 13 | Reunion Energy Company | Houston, TX 77056 | Oil & Gas Operator | May 1996 |
| 14 | Rme Petroleum Company | Houston, TX 77251 | Oil & Gas Operator | Nov 2016 |
| 15 | Ro-Jo, Inc. | Highland VLG, TX 75077 | Oil & Gas Operator | Aug 2003 |
| 16 | Rocc Operating, LLC | Houston, TX 77084 | Oil & Gas Operator | Apr 2024 |
| 17 | Rockbridge Oil & Gas | Houston, TX 77027 | Oil & Gas Operator | Mar 1990 |
| 18 | Rockford Energy Partners II, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Sep 2007 |
| 19 | Rockford Energy Partners III,LLC | Tulsa, OK 74103 | Oil & Gas Operator | Sep 2012 |
| 20 | Rockford Panhandle, LLC | Tulsa, OK 74105 | Oil & Gas Operator | Sep 2008 |
| 21 | Rodel Oil & Gas Company | Houston, TX 77218 | Oil & Gas Operator | Apr 2024 |
| 22 | Rosewood Resources, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Apr 2024 |
| 23 | Rusk County Well Service, Inc | Kilgore, TX 75662 | Gas Operator | Dec 2023 |
| 24 | Rwa Corporation | Houston, TX 77024 | Oil & Gas Operator | Sep 1999 |