| 1 | G A W Oil Company LLC | Enid, OK 73702-3926 | Oil & Gas Operator | Feb 2026 |
| 2 | Garrett, Dwayne M | | Oil & Gas Operator | Dec 2000 |
| 3 | Gary Jr Samuel & Assoc Inc | Denver, CO 80202-4803 | Oil & Gas Operator | Jul 1999 |
| 4 | Gas Enhancement Inc | Oklahoma City, OK 73120 | Oil & Gas Operator | Apr 2014 |
| 5 | Gene Cook Inc | Woodward, OK 73801 | Oil & Gas Operator | Feb 2026 |
| 6 | General Atlantic Resources Inc | Denver, CO 80202 | Oil & Gas Operator | Jan 2022 |
| 7 | General Minerals Corp | Oklahoma City, OK 73105 | Oil & Gas Operator | Dec 2015 |
| 8 | Genie Oil & Gas Corporation | Broken Arrow, OK 74013-3783 | Oil & Gas Operator | Jan 2026 |
| 9 | Geo720 LLC | Shattuck, OK 73858 | Oil & Gas Operator | Mar 2016 |
| 10 | Geodyne Operating Company | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2015 |
| 11 | GLB Exploration Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Feb 2026 |
| 12 | Glenn Supply Company, Inc. | Tulsa, OK 74101 | Oil & Gas Operator | Feb 2026 |
| 13 | Golden Gas Energies Inc | | Oil & Gas Operator | Jan 1999 |
| 14 | Golden Gas Production Company | Tulsa, OK 74136 | Oil & Gas Operator | Jan 2026 |
| 15 | Gothic Energy Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Jul 2015 |
| 16 | Gothic Production Corporation | Oklahoma City, OK 73154 | Oil & Gas Operator | Dec 2016 |
| 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 | Grand Resources Inc | Tulsa, OK 74137 | Oil & Gas Operator | Apr 2026 |
| 20 | Greenlee Oil And Gas LLC | Norman, OK 73072 | Oil & Gas Operator | Dec 2025 |
| 21 | Greenwood Energy Inc | Oklahoma City, OK 73116-9083 | Oil & Gas Operator | Mar 2015 |
| 22 | Gulf Exploration, LLC | Oklahoma City, OK 73114 | Oil & Gas Operator | Mar 2026 |
| 23 | Gulf Production Corporation | Oklahoma City, OK 73114 | Oil & Gas Operator | Apr 2015 |