| 1 | G E Operating, Inc. | Graham, TX 76450 | Oil & Gas Operator | May 2020 |
| 2 | Gastar Exploration LLC | Tulsa, OK 74136-1921 | Oil & Gas Operator | Jun 2025 |
| 3 | Gda Investments Inc | Oklahoma City, OK 73123-0403 | Oil & Gas Operator | Jun 2025 |
| 4 | Genie Oil & Gas Corporation | Broken Arrow, OK 74013-3783 | Oil & Gas Operator | Jun 2025 |
| 5 | Geo Exploration LLC | Oklahoma City, OK 73120-7116 | Oil & Gas Operator | Jun 2024 |
| 6 | Geodyne Operating Company | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2015 |
| 7 | Geodyne Resources Inc. | Tulsa, OK 74103 | Oil & Gas Operator | Jul 2010 |
| 8 | Gerwan Oil Company | Oklahoma City, OK 73159 | Oil Operator | Mar 2011 |
| 9 | Getty Oil Company | Hays, KS 67601 | Oil & Gas Operator | Mar 2015 |
| 10 | Glacier Petroleum Co Okla Inc | Edmond, OK 73013-1977 | Oil & Gas Operator | Jul 2025 |
| 11 | Gladiator Operating LLC | Ardmore, OK 73401 | Oil & Gas Operator | Jul 2025 |
| 12 | GLB Exploration, Inc. | Oklahoma City, OK 73102 | Oil & Gas Operator | Jul 2025 |
| 13 | Global Natural Res Corp | Houston, TX 77210 | Oil & Gas Operator | Dec 1994 |
| 14 | Golden Gas Production Company | Tulsa, OK 74136 | Oil & Gas Operator | May 2025 |
| 15 | Golden Gas Service Company | Tulsa, OK 74114 | Oil & Gas Operator | Jul 2025 |
| 16 | Gomaco Operating Company | Tulsa, OK 74115 | Oil & Gas Operator | Jul 2025 |
| 17 | Gothic Energy Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Jul 2015 |
| 18 | Grayhorse Operating Inc | Tulsa, OK 74103-4439 | Oil & Gas Operator | Jun 2025 |
| 19 | Great Horned Owls, LLC | Katy, TX 77494 | Oil & Gas Operator | Jun 2025 |
| 20 | Great Northern Gas Company | Denver, CO 80293-0602 | Oil & Gas Operator | Jul 2017 |
| 21 | Green Operating Company, Inc. | Tulsa, OK 74135 | Oil & Gas Operator | Jun 2025 |
| 22 | Greenlee Oil And Gas LLC | Norman, OK 73072 | Oil & Gas Operator | Jun 2025 |
| 23 | Guest Petroleum Incorporated | Edmond, OK 73013 | Oil & Gas Operator | Jul 2025 |
| 24 | Guest R E Oil Producer | Edmond, OK 73083-0805 | Oil & Gas Operator | Mar 2015 |
| 25 | Gulf Exploration, LLC | Oklahoma City, OK 73114 | Oil & Gas Operator | Sep 2025 |
| 26 | Gulf Production Corporation | Oklahoma City, OK 73114 | Oil & Gas Operator | Apr 2015 |