| 1 | R A Miller Energy Inc | Edmond, OK 73003 | Oil & Gas Operator | Mar 2020 |
| 2 | R C Taylor Operating Company LLC | Oklahoma City, OK 73118 | Oil & Gas Operator | Feb 2024 |
| 3 | Range Production Company | Fort Worth, TX 76102 | Oil & Gas Operator | Sep 2021 |
| 4 | RB Operating Company | Shawnee, OK 74802-1488 | Oil & Gas Operator | Apr 2015 |
| 5 | Reading & Bates Petroleum Co | Tulsa, OK 74136 | Oil & Gas Operator | Aug 2009 |
| 6 | Red Hawk Disposal LLC | | Oil Operator | Jun 2023 |
| 7 | Redbud E & P, Inc. | Spring, TX 77379 | Oil & Gas Operator | May 2024 |
| 8 | Redstone Oil & Gas Company | Dallas, TX 75225 | Oil & Gas Operator | Jan 2020 |
| 9 | Redwine Resources Inc | Dallas, TX 75225 | Oil & Gas Operator | Feb 2015 |
| 10 | Revere Corporation | Fort Smith, AR 72902-0908 | Oil & Gas Operator | Feb 2015 |
| 11 | Revilo Exploration, Inc. | Richardson, TX 75081 | Oil & Gas Operator | Jul 2021 |
| 12 | Ricks Exploration Co | Oklahoma City, OK 73112 | Oil & Gas Operator | Mar 2015 |
| 13 | Rife Oil Properties Inc | Fort Worth, TX 76107 | Oil & Gas Operator | May 2024 |
| 14 | Riley Exploration Operating Co LLC | | Gas Operator | Jun 2017 |
| 15 | Rio VIsta Operating LLC | Eufaula, OK 74432-0789 | Gas Operator | Jan 2024 |
| 16 | Riverfront Exploration LLC | Fort Smith, AR 72901 | Gas Operator | Feb 2024 |
| 17 | Riviera Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | Feb 2024 |
| 18 | Rockin S Field Service LLC | | Gas Operator | Jan 2024 |
| 19 | Royal Oaks Petroleum Corp | Fort Worth, TX 76116 | Oil & Gas Operator | Dec 2001 |
| 20 | Royalty Petroleum Company | Oklahoma City, OK 73120 | Gas Operator | Feb 2002 |
| 21 | Roye Realty & Developing Inc | Stigler, OK 74462-0148 | Gas Operator | Dec 2004 |
| 22 | Russell Oil Company | Haskell, OK 74436 | Oil & Gas Operator | Apr 2014 |