| 1 | R & C Petroleum, Inc. | Flint, TX 75762 | Oil & Gas Operator | Jul 2025 |
| 2 | R & S Energy, Inc. | Snook, TX 77878 | Oil & Gas Operator | Jul 2025 |
| 3 | R&R Resources Corporation | Houston, TX 77056 | Oil & Gas Operator | Dec 2015 |
| 4 | Radius Operating, LLC | Round Rock, TX 78664 | Oil & Gas Operator | Jul 2025 |
| 5 | Ram Operating Company, Inc. | Houston, TX 77002 | Oil & Gas Operator | Sep 2012 |
| 6 | Ramco Oil & Gas Inc | Midland, TX 79701 | Oil & Gas Operator | Nov 2006 |
| 7 | Ramtex Energy LLC | Tulsa, OK 74114 | Oil & Gas Operator | Jul 2025 |
| 8 | Range Production Company | Fort Worth, TX 76102 | Oil & Gas Operator | Sep 2021 |
| 9 | Rathburn Land & Devel, Inc. | Giddings, TX 78942 | Oil & Gas Operator | Aug 2003 |
| 10 | Raymond, WM. C. | Rockdale, TX 76567 | Oil & Gas Operator | Jul 2025 |
| 11 | Red Chalk Resources LLC | Houston, TX 77218 | Oil Operator | Jul 2025 |
| 12 | Red Hills Energy, LLC | Medicine Lodge, KS 67104 | Oil & Gas Operator | Mar 2025 |
| 13 | Red Water Resources, Inc. | Tulsa, OK 74159 | Oil & Gas Operator | Jul 2025 |
| 14 | Redbud E & P, Inc. | Giddings, TX 78942 | Oil & Gas Operator | Jul 2025 |
| 15 | Redco Oil & Gas, Inc. | Andrews, TX 79714 | Oil & Gas Operator | Jul 2025 |
| 16 | Redwood Energy, Inc. | Giddings, TX 78942 | Oil & Gas Operator | Jul 1997 |
| 17 | Rego Development Company, Inc. | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Apr 2002 |
| 18 | Rein Pusher Operating LLC | Brenham, TX 77834 | Oil & Gas Operator | Jul 2025 |
| 19 | Remuda Operating Company | Midland, TX 79711 | Oil & Gas Operator | Jul 2025 |
| 20 | Resaca Resources, L.L.C. | Austin, TX 78746 | Oil & Gas Operator | Jul 2025 |
| 21 | Reserve Production, Inc. | Tyler, TX 75713 | Oil & Gas Operator | Mar 2008 |
| 22 | Retamco Operating Inc | Red Lodge, MT 59068 | Oil & Gas Operator | May 2025 |
| 23 | Rme Austin Chalk Company | Houston, TX 77251 | Oil & Gas Operator | Nov 2002 |
| 24 | Rme Petroleum Company | Houston, TX 77251 | Oil & Gas Operator | Nov 2016 |
| 25 | Robert T. Epperson Prod Co, LLC | Tyler, TX 75713 | Gas Operator | Dec 2017 |
| 26 | Rosenthal, Stanley H. | Bay City, TX 77404 | Oil & Gas Operator | Dec 2020 |
| 27 | Rosewood Resources, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Jul 2025 |
| 28 | Ross Operating Company | Shreveport, LA 71163 | Oil & Gas Operator | May 1996 |
| 29 | Rumble Energy LLC | Skiatook, OK 74070 | Oil & Gas Operator | Jul 2025 |
| 30 | Rusk Energy Operating LLC | Houston, TX 77040 | Oil & Gas Operator | Jul 2025 |
| 31 | Rwa Corporation | Houston, TX 77024 | Oil & Gas Operator | Sep 1999 |
| 32 | Ryann Operating, LLC | Waller, TX 77484 | Oil & Gas Operator | Jul 2025 |