| 1 | G A W Oil Company LLC | Enid, OK 73702-3926 | Oil & Gas Operator | Oct 2025 |
| 2 | Gala Resources, LTD. | Graham, TX 76450 | Oil & Gas Operator | Oct 2025 |
| 3 | Gastar Exploration LLC | Tulsa, OK 74136-1921 | Oil & Gas Operator | Oct 2025 |
| 4 | Gene Cook Inc | Woodward, OK 73801 | Oil & Gas Operator | Oct 2025 |
| 5 | General Atlantic Resources Inc | Denver, CO 80202 | Oil & Gas Operator | Jan 2022 |
| 6 | General Minerals Corp | Oklahoma City, OK 73105 | Oil & Gas Operator | Dec 2015 |
| 7 | General Producing Co | Houston, TX 77002 | Oil & Gas Operator | Jun 1993 |
| 8 | Geodyne Operating Company | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2015 |
| 9 | Geodyne Resources Inc | Tulsa, OK 74103 | Oil & Gas Operator | Jul 2010 |
| 10 | Getty Reserve Oil Inc | White Plains, NY 10650 | Oil & Gas Operator | Mar 2005 |
| 11 | GLB Exploration Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Oct 2025 |
| 12 | Golden Gas Production Company | Tulsa, OK 74136 | Oil & Gas Operator | Sep 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 | GPM Gas Corporation | Oklahoma City, OK 73102-5627 | Oil & Gas Operator | Nov 1998 |
| 16 | Graham Oil And Gas LTD | Covington, LA 70434-3134 | Oil & Gas Operator | Aug 2013 |
| 17 | Graham Royalty LTD | Covington, LA 70434 | Oil & Gas Operator | Jul 2007 |
| 18 | Graham-Michaelis Corporation | Wichita, KS 67201 | Oil & Gas Operator | Dec 2010 |
| 19 | Griffin Resources LLC | Breckenridge, TX 76424 | Oil & Gas Operator | Dec 2025 |
| 20 | Guest Petroleum Incorporated | Edmond, OK 73013 | Oil & Gas Operator | Oct 2025 |
| 21 | Guest R E Oil Producer | Edmond, OK 73083-0805 | Oil & Gas Operator | Mar 2015 |
| 22 | Gulf Exploration, LLC | Oklahoma City, OK 73114 | Oil & Gas Operator | Nov 2025 |