| 1 | G E Operating, Inc. | Graham, TX 76450 | Oil & Gas Operator | May 2020 |
| 2 | Garrison Bros Pipe & Used Equip Inc | Hinton, OK 73047 | Oil & Gas Operator | Aug 2013 |
| 3 | Gas Development Corp. | Broken Arrow, OK 74012 | Oil & Gas Operator | Mar 2015 |
| 4 | Gateway Pipeline Co | Houston, TX 77002 | Gas Operator | Oct 2003 |
| 5 | Gda Investments Inc | Oklahoma City, OK 73123-0403 | Oil & Gas Operator | Jan 2025 |
| 6 | General Atlantic Resources Inc | Denver, CO 80202 | Oil & Gas Operator | Jan 2022 |
| 7 | Genesis Crude Oil LP | Houston, TX 77002 | Oil & Gas Operator | Apr 2000 |
| 8 | Germany Operating Company | Houston, TX 77090 | Oil & Gas Operator | Sep 2011 |
| 9 | Geyer Brothers Equipment Company | Noble, OK 73068-8540 | Oil & Gas Operator | Mar 2011 |
| 10 | GLB Exploration, Inc. | Oklahoma City, OK 73102 | Oil & Gas Operator | Jan 2025 |
| 11 | Glenn Supply Company, Inc. | Tulsa, OK 74101 | Oil & Gas Operator | Dec 2024 |
| 12 | Gosnell Tony Operating LLC | Lindsay, OK 73052 | Oil & Gas Operator | Jan 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 | Grace Energy Management Inc | Cement, OK 73017 | Oil Operator | Jan 2025 |
| 16 | Graham Royalty LTD | Covington, LA 70434 | Oil & Gas Operator | Jul 2007 |
| 17 | Gray Lloyd Energy Inc | Oklahoma City, OK 73120-8112 | Oil & Gas Operator | Nov 2005 |
| 18 | Grizzly Operating LLC | Houston, TX 77057 | Oil & Gas Operator | Jan 2025 |
| 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 | Feb 2025 |
| 21 | Gulf Production Corporation | Oklahoma City, OK 73114 | Oil & Gas Operator | Apr 2015 |