| 1 | G P II Energy, Inc. | Midland, TX 79710 | Oil & Gas Operator | Sep 2020 |
| 2 | Gap Exploration, LTD. | Naples, FL 34110 | Oil & Gas Operator | Jul 2008 |
| 3 | Gardner Energy Corporation | Houston, TX 77024 | Oil & Gas Operator | Mar 1999 |
| 4 | Gda Investments Inc | Oklahoma City, OK 73123-0403 | Oil & Gas Operator | Sep 2025 |
| 5 | Geodyne Operating Company | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2015 |
| 6 | Goodnight Midstream Permian, LLC | Dallas, TX 75206 | Oil & Gas Operator | Dec 2025 |
| 7 | Grace Petroleum Corp. | Tulsa, OK 74103 | Oil & Gas Operator | Oct 1997 |
| 8 | Grace Petroleum Operating, LLC | Llano, TX 78643 | Oil & Gas Operator | Dec 2025 |
| 9 | Graco Operations Company | Odessa, TX 79768 | Gas Operator | Sep 1997 |
| 10 | Graham Royalty LTD | Covington, LA 70434 | Oil & Gas Operator | Jul 2007 |
| 11 | Graham, Bill J. Oil & Gas Corp. | Midland, TX 79710 | Oil & Gas Operator | Nov 2000 |
| 12 | Graystone Exploration Corp. | Garland, TX 75043 | Oil & Gas Operator | Aug 2003 |
| 13 | Great Texas Crude Inc. | Fredericksbrg, TX 78624 | Oil & Gas Operator | Dec 2025 |
| 14 | Great Western Drilling Company | Midland, TX 79701 | Oil & Gas Operator | Dec 2025 |
| 15 | Greenlake Energy Operating, LLC | Austin, TX 78746 | Oil & Gas Operator | Dec 2025 |
| 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 | GW Investments, LLC | Mustang, OK 73064 | Oil Operator | Aug 2025 |