| 1 | G & S Production Inc. | Chickasha, OK 73018 | Oil Operator | Apr 2026 |
| 2 | G E Operating, Inc. | Graham, TX 76450 | Oil & Gas Operator | May 2020 |
| 3 | Garrison Bros Pipe & Used Equip Inc | Hinton, OK 73047 | Oil & Gas Operator | Aug 2013 |
| 4 | Gas Development Corporation | Broken Arrow, OK 74012 | Oil & Gas Operator | Mar 2015 |
| 5 | General Atlantic Resources Inc | Denver, CO 80202 | Oil & Gas Operator | Jan 2022 |
| 6 | Germany Operating Company | Houston, TX 77090 | Oil & Gas Operator | Sep 2011 |
| 7 | Geyer Brothers Equipment Company | Noble, OK 73068-8540 | Oil & Gas Operator | Mar 2011 |
| 8 | Glacier Petroleum Co Okla Inc | Edmond, OK 73013-1977 | Oil & Gas Operator | Apr 2026 |
| 9 | GLB Exploration Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Apr 2026 |
| 10 | Glenn Supply Company, Inc. | Tulsa, OK 74101 | Oil & Gas Operator | Apr 2026 |
| 11 | Gosnell Tony Operating LLC | Lindsay, OK 73052 | Oil & Gas Operator | Apr 2026 |
| 12 | Gothic Energy Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Jul 2015 |
| 13 | Gothic Production Corporation | Oklahoma City, OK 73154 | Oil & Gas Operator | Dec 2016 |
| 14 | Grace Energy Management Inc | Cement, OK 73017 | Oil Operator | Apr 2026 |
| 15 | Graham Royalty LTD | Covington, LA 70434 | Oil & Gas Operator | Jul 2007 |
| 16 | Gray Lloyd Energy Inc | Oklahoma City, OK 73120-8112 | Oil & Gas Operator | Nov 2005 |
| 17 | Great Horned Owls, LLC | Pampa, TX 79065 | Oil & Gas Operator | Apr 2026 |
| 18 | Grizzly Operating, LLC | Houston, TX 77057 | Oil & Gas Operator | Apr 2026 |
| 19 | Grynberg Petroleum Company | Greenwood Vge, CO 80111-3326 | Oil & Gas Operator | Oct 2019 |
| 20 | Gulf Exploration, LLC | Oklahoma City, OK 73114 | Oil & Gas Operator | May 2026 |
| 21 | Gulf Production Corporation | Oklahoma City, OK 73114 | Oil & Gas Operator | Apr 2015 |