| 1 | G R B Resources Inc | Tulsa, OK 74136-5108 | Oil & Gas Operator | Aug 2013 |
| 2 | Gatewood Edward J "Bob" | Holdenville, OK 74848 | Oil & Gas Operator | May 2013 |
| 3 | Gel Oil & Gas Inc | Wetumka, OK 74883-6238 | Oil & Gas Operator | Jul 2016 |
| 4 | General Petroleum Corp | Sand Springs, OK 74063-6646 | Oil & Gas Operator | Jul 2015 |
| 5 | Genesis Inc | Seminole, OK 74818-1647 | Oil & Gas Operator | Sep 2014 |
| 6 | Geoex Resources Inc | | Oil & Gas Operator | Jan 1997 |
| 7 | Geoquest Energy Inc | Enid, OK 73706-0216 | Oil & Gas Operator | Nov 2015 |
| 8 | Gilbert Oil Properties | Tulsa, OK 74105-3741 | Oil Operator | Oct 2024 |
| 9 | GLB Exploration, Inc. | Oklahoma City, OK 73102 | Oil & Gas Operator | Oct 2024 |
| 10 | Glenco Oil & Gas Corporation | Wewoka, OK 74884-0727 | Oil & Gas Operator | Sep 2021 |
| 11 | Glenn Supply Company, Inc. | Tulsa, OK 74101 | Oil & Gas Operator | Sep 2024 |
| 12 | Golden Gas Service Company | Tulsa, OK 74114 | Oil & Gas Operator | Oct 2024 |
| 13 | Gomaco Inc | Tulsa, OK 74103-5061 | Oil & Gas Operator | Apr 2015 |
| 14 | Gomaco Operating Company | Tulsa, OK 74115 | Oil & Gas Operator | Sep 2024 |
| 15 | Gothic Energy Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Jul 2015 |
| 16 | Gothic Production Corporation | Oklahoma City, OK 73154 | Oil & Gas Operator | Dec 2016 |
| 17 | Grand Resources Inc | Tulsa, OK 74137 | Oil & Gas Operator | Dec 2024 |
| 18 | Grant Petroleum Corporation | Horseshoe Bay, TX 78657-8926 | Oil & Gas Operator | Dec 2014 |
| 19 | Great Plains Oil & Gas | Ada, OK 74820-7209 | Oil & Gas Operator | May 2013 |
| 20 | Great Southwestern Expl Inc | Tulsa, OK 74105 | Oil & Gas Operator | Sep 2024 |
| 21 | Green Operating Company, Inc. | Tulsa, OK 74135 | Oil & Gas Operator | Aug 2024 |
| 22 | Green William G | Jenks, OK 74037-3233 | Oil & Gas Operator | Apr 2020 |
| 23 | Grizzly Operating LLC | Houston, TX 77057 | Oil & Gas Operator | Oct 2024 |
| 24 | Gugli Corporation | Byng, OK 74820 | Oil & Gas Operator | Sep 2014 |
| 25 | Gulf Production Corporation | Oklahoma City, OK 73114 | Oil & Gas Operator | Apr 2015 |
| 26 | Gulfport Energy Corporation | Oklahoma City, OK 73134-5003 | Oil & Gas Operator | Sep 2024 |