| 1 | R & H LLC | Ardmore, OK 73401-6329 | Oil & Gas Operator | Mar 2015 |
| 2 | R D T Properties | Tulsa, OK 74105-7122 | Oil & Gas Operator | Sep 2017 |
| 3 | R L Clampitt & Associates LLC | Bartlesville, OK 74006 | Oil & Gas Operator | Jul 2025 |
| 4 | Ra-Jac LLC | Norman, OK 73072 | Oil & Gas Operator | Jul 2025 |
| 5 | Range Production Company | Fort Worth, TX 76102 | Oil & Gas Operator | Sep 2021 |
| 6 | Range Production Company, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Jul 2025 |
| 7 | Red River Petroleum Inc | Tipton, OK 73570 | Oil Operator | Jun 2025 |
| 8 | Red Rocks Oil & Gas Operating LLC | Oklahoma City, OK 73103-4821 | Oil & Gas Operator | Jul 2025 |
| 9 | Reid Williams Operating Inc | Shreveport, LA 71106-6223 | Oil & Gas Operator | Jun 2025 |
| 10 | Richardson WM S | Duncan, OK 73533 | Oil Operator | Jun 2013 |
| 11 | Rio Petroleum, Inc. | Amarillo, TX 79102 | Oil & Gas Operator | Oct 2025 |
| 12 | Riviera Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | Jul 2025 |
| 13 | RJ Williams Oil & Gas LLC | Ardmore, OK 73401 | Oil & Gas Operator | Jun 2025 |
| 14 | Roundup Oil LLC | Springer, OK 73458 | Oil & Gas Operator | Jul 2025 |
| 15 | Rue Johnny B | Duncan, OK 73533-2019 | Oil & Gas Operator | Jan 2025 |
| 16 | Russell D Meloy Oil & Gas Co | Enid, OK 73703-1623 | Oil & Gas Operator | Jul 2025 |