| 1 | G E Operating, Inc. | Graham, TX 76450 | Oil & Gas Operator | May 2020 |
| 2 | Gel Oil & Gas Inc | Wetumka, OK 74883-6238 | Oil & Gas Operator | Jul 2016 |
| 3 | Gene Cook Inc | Woodward, OK 73801 | Oil & Gas Operator | Jul 2025 |
| 4 | General Atlantic Resources Inc | Denver, CO 80202 | Oil & Gas Operator | Jan 2022 |
| 5 | General Exploration Inc | | Oil & Gas Operator | Aug 2001 |
| 6 | Geo American Resources Inc | Tulsa, OK 74103 | Oil & Gas Operator | Jul 2025 |
| 7 | Geodyne Operating Company | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2015 |
| 8 | Geodyne Resources Inc. | Tulsa, OK 74103 | Oil & Gas Operator | Jul 2010 |
| 9 | Gilco Oil Inc | Ada, OK 74820 | Oil & Gas Operator | May 2019 |
| 10 | Golden Gas Energies Inc | | Oil & Gas Operator | Jan 1999 |
| 11 | Golden Gas Production Company | Tulsa, OK 74136 | Oil & Gas Operator | May 2025 |
| 12 | Gomaco Operating Company | Tulsa, OK 74115 | Oil & Gas Operator | Jul 2025 |
| 13 | Gothic Energy Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Jul 2015 |
| 14 | Gothic Production Corporation | Oklahoma City, OK 73154 | Oil & Gas Operator | Dec 2016 |
| 15 | Grasen Energy, Inc. | Amarillo, TX 79159 | Oil & Gas Operator | Aug 2013 |
| 16 | Greenhead Energy Operating LLC | Oklahoma City, OK 73131 | Oil & Gas Operator | Jul 2025 |
| 17 | Ground Development Company Inc | Dallas, TX 75229-0377 | Oil & Gas Operator | Jan 2013 |
| 18 | Gulf Exploration, LLC | Oklahoma City, OK 73114 | Oil & Gas Operator | Sep 2025 |
| 19 | Gulf Production Corporation | Oklahoma City, OK 73114 | Oil & Gas Operator | Apr 2015 |