| 1 | G E Operating, Inc. | Graham, TX 76450 | Oil & Gas Operator | May 2020 |
| 2 | Gala Resources, LTD. | Graham, TX 76450 | Oil & Gas Operator | Jun 2025 |
| 3 | Garrison Bros Pipe & Used Equip Inc | Hinton, OK 73047 | Oil & Gas Operator | Aug 2013 |
| 4 | Gas Development Corp. | Broken Arrow, OK 74012 | Oil & Gas Operator | Mar 2015 |
| 5 | Gasanadarko LTD | Oklahoma City, OK 73116 | Gas Operator | May 1994 |
| 6 | Gemini Exploration Inc | Oklahoma City, OK 73159 | Oil & Gas Operator | May 2013 |
| 7 | General Atlantic Resources Inc | Denver, CO 80202 | Oil & Gas Operator | Jan 2022 |
| 8 | General Exploration Inc | | Oil & Gas Operator | Aug 2001 |
| 9 | Geo American Resources Inc | Tulsa, OK 74103 | Oil & Gas Operator | Jul 2025 |
| 10 | Geodyne Operating Company | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2015 |
| 11 | GHK Company LLC (The) | Oklahoma City, OK 73118-1120 | Oil & Gas Operator | Apr 2018 |
| 12 | Gilliland Oil And Gas Inc | Hennessey, OK 73742 | Oil & Gas Operator | Jul 2025 |
| 13 | Golden Gas Energies Inc | | Oil & Gas Operator | Jan 1999 |
| 14 | Golden Gas Production Company | Tulsa, OK 74136 | Oil & Gas Operator | May 2025 |
| 15 | Gosnell Tony Operating LLC | Lindsay, OK 73052 | Oil & Gas Operator | Jul 2025 |
| 16 | Grace Petroleum, L.P. | Midland, TX 79708 | Oil & Gas Operator | May 2016 |
| 17 | Grand Resources Inc | Tulsa, OK 74137 | Oil & Gas Operator | Oct 2025 |
| 18 | Great Western Land Co Inc | Tulsa, OK 74136-1517 | Oil & Gas Operator | Jun 2000 |
| 19 | Green River Exploration Co | Tulsa, OK 74121-1468 | Oil & Gas Operator | Sep 2011 |