| 1 | G & N Oil & Gas LLC | Asher, OK 74826 | Oil & Gas Operator | Mar 2025 |
| 2 | G A W Oil Company LLC | Enid, OK 73702-3926 | Oil & Gas Operator | May 2025 |
| 3 | G E Operating, Inc. | Graham, TX 76450 | Oil & Gas Operator | May 2020 |
| 4 | Garrison Bros Pipe & Used Equip Inc | Hinton, OK 73047 | Oil & Gas Operator | Aug 2013 |
| 5 | Gary M Lake & Company | Edmond, OK 73012-8208 | Oil & Gas Operator | Aug 2021 |
| 6 | Gastar Exploration LLC | Tulsa, OK 74136-1921 | Oil & Gas Operator | Apr 2025 |
| 7 | General Atlantic Resources Inc | Denver, CO 80202 | Oil & Gas Operator | Jan 2022 |
| 8 | Geodyne Operating Company | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2015 |
| 9 | Germany Operating Company | Houston, TX 77090 | Oil & Gas Operator | Sep 2011 |
| 10 | Getty Oil Company | Hays, KS 67601 | Oil & Gas Operator | Mar 2015 |
| 11 | Geyer Brothers Equipment Company | Noble, OK 73068-8540 | Oil & Gas Operator | Mar 2011 |
| 12 | Gilliland Oil And Gas Inc | Hennessey, OK 73742 | Oil & Gas Operator | May 2025 |
| 13 | Glacier Petroleum Co Okla Inc | Edmond, OK 73013-1977 | Oil & Gas Operator | May 2025 |
| 14 | GLB Exploration, Inc. | Oklahoma City, OK 73102 | Oil & Gas Operator | May 2025 |
| 15 | Golden Gas Energies Inc | | Oil & Gas Operator | Jan 1999 |
| 16 | Golden Gas Production Company | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2025 |
| 17 | Gothic Energy Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Jul 2015 |
| 18 | Gothic Production Corporation | Oklahoma City, OK 73154 | Oil & Gas Operator | Dec 2016 |
| 19 | Graham Royalty LTD | Covington, LA 70434 | Oil & Gas Operator | Jul 2007 |
| 20 | Greenhead Energy Operating LLC | Oklahoma City, OK 73131 | Oil & Gas Operator | May 2025 |
| 21 | Greenlee Oil And Gas LLC | Norman, OK 73072 | Oil & Gas Operator | Apr 2025 |
| 22 | Griffin Resources LLC | Breckenridge, TX 76424 | Oil & Gas Operator | Jul 2025 |
| 23 | Grizzly Operating LLC | Houston, TX 77057 | Oil & Gas Operator | May 2025 |
| 24 | Gulf Exploration, LLC | Oklahoma City, OK 73114 | Oil & Gas Operator | Jun 2025 |
| 25 | Gulfstream Petroleum Corp. | | Oil & Gas Operator | Feb 2002 |