| 1 | Gap Exploration, LTD. | Naples, FL 34110 | Oil & Gas Operator | Jul 2008 |
| 2 | Gardner Energy Corporation | Houston, TX 77024 | Oil & Gas Operator | Mar 1999 |
| 3 | Gco Drilling Company | Midland, TX 79702 | Oil & Gas Operator | Dec 1993 |
| 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 | GHS Energy Operating, LLC | Midland, TX 79701 | Oil & Gas Operator | Dec 2024 |
| 7 | Gilliam'S Aghorn Energy | Odessa, TX 79768 | Oil & Gas Operator | May 1997 |
| 8 | Golden Specialties Oil & Gas | Midland, TX 79708 | Oil & Gas Operator | Dec 2024 |
| 9 | Gould Energy Co. | Owasso, OK 74055 | Oil & Gas Operator | Mar 2005 |
| 10 | Grace Petroleum LP | Midland, TX 79708 | Oil & Gas Operator | May 2016 |
| 11 | Grace Petroleum Operating, LLC | Llano, TX 78643 | Oil & Gas Operator | Dec 2024 |
| 12 | Graham Royalty LTD | Covington, LA 70434 | Oil & Gas Operator | Jul 2007 |
| 13 | Grand Banks Energy Company | Fort Worth, TX 76102 | Oil & Gas Operator | Oct 2024 |
| 14 | Gresham Oil & Gas (USA) Inc. | Littleton, CO 80122 | Oil & Gas Operator | Jan 1999 |
| 15 | Griffin Petroleum Company | Midland, TX 79705 | Oil & Gas Operator | Dec 2024 |
| 16 | Grizzly Op Of Delaware, LLC | Houston, TX 77057 | Oil & Gas Operator | Mar 2021 |
| 17 | Gruy Petroleum Management Co. | Irving, TX 75014 | Oil & Gas Operator | Nov 2014 |
| 18 | GTG Operating, LLC | Tyler, TX 75702 | Oil & Gas Operator | Dec 2024 |
| 19 | Guidon Energy MGMT Services LLC | Irving, TX 75062 | Oil & Gas Operator | Dec 2020 |
| 20 | Gulfmark Energy Inc | Houston, TX 77027 | Gas Operator | Apr 2023 |