| 1 | G A W Oil Company LLC | Enid, OK 73702-3926 | Oil & Gas Operator | Mar 2025 |
| 2 | G E Operating, Inc. | Graham, TX 76450 | Oil & Gas Operator | May 2020 |
| 3 | G M C Oil & Gas LTD | Oklahoma City, OK 73102-8804 | Oil & Gas Operator | Sep 1999 |
| 4 | Gala Resources, LTD. | Graham, TX 76450 | Oil & Gas Operator | Feb 2025 |
| 5 | Gary Jr Samuel & Assoc Inc | Denver, CO 80202-4803 | Oil & Gas Operator | Jul 1999 |
| 6 | Gda Investments Inc | Oklahoma City, OK 73123-0403 | Oil & Gas Operator | Mar 2025 |
| 7 | Gel Oil & Gas Inc | Wetumka, OK 74883-6238 | Oil & Gas Operator | Jul 2016 |
| 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 | Geyer Brothers Equipment Company | Noble, OK 73068-8540 | Oil & Gas Operator | Mar 2011 |
| 11 | Gilliland Oil And Gas Inc | Hennessey, OK 73742 | Oil & Gas Operator | Mar 2025 |
| 12 | GLM Energy Inc | Oklahoma City, OK 73142 | Oil & Gas Operator | Feb 2025 |
| 13 | Golden Gas Production Company | Tulsa, OK 74136 | Oil & Gas Operator | Jan 2025 |
| 14 | Golden Gas Service Company | Tulsa, OK 74114 | Oil & Gas Operator | Mar 2025 |
| 15 | Good Vaughn Oil Company LLC | Enid, OK 73702-3744 | Oil & Gas Operator | Jun 2019 |
| 16 | Gothic Production Corporation | Oklahoma City, OK 73154 | Oil & Gas Operator | Dec 2016 |
| 17 | Graham Oil And Gas, LTD. | Covington, LA 70434-3134 | Oil & Gas Operator | Aug 2013 |
| 18 | Graham Royalty LTD | Covington, LA 70434 | Oil & Gas Operator | Jul 2007 |
| 19 | Graham-Michaelis Corporation | Wichita, KS 67201 | Oil & Gas Operator | Dec 2010 |
| 20 | Grand Resources Inc | Tulsa, OK 74137 | Oil & Gas Operator | Jun 2025 |
| 21 | Great Plains Pipeline Company | Tulsa, OK 74135-6405 | Oil & Gas Operator | Jul 2014 |
| 22 | Green Valley Disposal Serv LLC | Alva, OK 73717 | Oil Operator | Feb 2025 |
| 23 | Greenhead Energy Operating LLC | Oklahoma City, OK 73131 | Oil & Gas Operator | Mar 2025 |
| 24 | Greystone Exploration Co | Oklahoma City, OK 73177 | Oil & Gas Operator | Apr 1996 |
| 25 | Griffin Resources LLC | Breckenridge, TX 76424 | Oil & Gas Operator | Jun 2025 |
| 26 | Gulf Exploration, LLC | Oklahoma City, OK 73114 | Oil & Gas Operator | May 2025 |
| 27 | Gulf Production Corporation | Oklahoma City, OK 73114 | Oil & Gas Operator | Apr 2015 |