| 1 | Gallagher Oil | Grandfalls, TX 79742 | Oil Operator | Apr 2025 |
| 2 | Gardner Energy Corporation | Houston, TX 77024 | Oil & Gas Operator | Mar 1999 |
| 3 | Gauge Oil Company | Luling, TX 78648 | Oil & Gas Operator | Nov 2025 |
| 4 | General Atlantic Resources Inc | Denver, CO 80202 | Oil & Gas Operator | Jan 2022 |
| 5 | Geodyne Operating Company | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2015 |
| 6 | Germany Operating Company | Houston, TX 77090 | Oil & Gas Operator | Sep 2011 |
| 7 | Goodnight Midstream Permian, LLC | Dallas, TX 75206 | Oil & Gas Operator | Nov 2025 |
| 8 | Graham Royalty LTD | Covington, LA 70434 | Oil & Gas Operator | Jul 2007 |
| 9 | Graham, Bill J. Oil & Gas Corp. | Midland, TX 79710 | Oil & Gas Operator | Nov 2000 |
| 10 | Graham, H.E. | Imperial, TX 79743 | Oil & Gas Operator | Mar 2007 |
| 11 | Great Western Drilling Company | Midland, TX 79701 | Oil & Gas Operator | Nov 2025 |
| 12 | Greenlake Energy Operating, LLC | Austin, TX 78746 | Oil & Gas Operator | Nov 2025 |
| 13 | Griffin Petroleum Company | Midland, TX 79705 | Oil & Gas Operator | Nov 2025 |
| 14 | Grizzly Op Of Delaware, LLC | Houston, TX 77057 | Oil & Gas Operator | Mar 2021 |
| 15 | Gruy Petroleum Management Co. | Irving, TX 75014 | Oil & Gas Operator | Nov 2014 |
| 16 | Gulf Production Corporation | Oklahoma City, OK 73114 | Oil & Gas Operator | Apr 2015 |
| 17 | Guthrie, A. K. Operating Co. | Big Spring, TX 79720 | Oil & Gas Operator | Mar 1996 |