| 1 | Gco Drilling Company | Midland, TX 79702 | Oil & Gas Operator | Dec 1993 |
| 2 | Genie Corporation | Abilene, TX 79604 | Oil & Gas Operator | Mar 2008 |
| 3 | Geotrac Energy Corporation | Abilene, TX 79604 | Oil & Gas Operator | Jul 2000 |
| 4 | Gillring Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | May 1994 |
| 5 | Gilmore Oil & Gas | Houston, TX 77002 | Oil & Gas Operator | Oct 2025 |
| 6 | Glahn Resources, Inc. | Arlington, TX 76003 | Oil & Gas Operator | Oct 2025 |
| 7 | GNG Operating LLC | Graham, TX 76450 | Oil Operator | Oct 2025 |
| 8 | Goodrock Natural Resources, LLC | Tulsa, OK 74136 | Oil & Gas Operator | Oct 2025 |
| 9 | Grace Petroleum Operating, LLC | Llano, TX 78643 | Oil & Gas Operator | Oct 2025 |
| 10 | Graham Royalty LTD | Covington, LA 70434 | Oil & Gas Operator | Jul 2007 |
| 11 | Gramrich Oil & Gas Corporation | Coppell, TX 75019 | Oil & Gas Operator | Oct 2012 |
| 12 | Grandfield Consulting, Inc. | Wichita Falls, TX 76307 | Oil & Gas Operator | Feb 2011 |
| 13 | Great Western Drilling Co | Midland, TX 79701 | Oil & Gas Operator | Oct 2025 |
| 14 | Greenbriar Energy Inc. | Houston, TX 77098 | Oil & Gas Operator | Feb 2004 |
| 15 | Grizzly Op Of Delaware, LLC | Houston, TX 77057 | Oil & Gas Operator | Mar 2021 |
| 16 | Gruy Petroleum Management Co. | Irving, TX 75014 | Oil & Gas Operator | Nov 2014 |
| 17 | GTG Operating, LLC | Tyler, TX 75702 | Oil & Gas Operator | Oct 2025 |
| 18 | Gungoll, Carl E. Exploration LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Oct 2025 |