| 1 | Gaither Petroleum Corporation | Katy, TX 77493 | Oil & Gas Operator | Oct 2025 |
| 2 | Galveston Bay Energy, LLC | Spring, TX 77386 | Oil & Gas Operator | Jul 2017 |
| 3 | Galveston Bay Operating Co LLC | Houston, TX 77002 | Oil & Gas Operator | Oct 2025 |
| 4 | Gary Oil & Gas | Deer Park, TX 77536 | Oil & Gas Operator | Oct 2025 |
| 5 | Gcows Operating LLC | Montgomery, TX 77356 | Oil Operator | Oct 2025 |
| 6 | Genesis Producing Company | Houston, TX 77024 | Oil & Gas Operator | Oct 2007 |
| 7 | Goldking Prod. Co. | Houston, TX 77002 | Oil & Gas Operator | Apr 1998 |
| 8 | Goldston Oil Corporation | Houston, TX 77257 | Oil & Gas Operator | Oct 2025 |
| 9 | Good Ol'Boys Oil Company | Houston, TX 77057 | Oil & Gas Operator | Oct 2025 |
| 10 | Goodrich Petroleum Company | Houston, TX 77002 | Oil & Gas Operator | Feb 2022 |
| 11 | Graham Royalty LTD | Covington, LA 70434 | Oil & Gas Operator | Jul 2007 |
| 12 | Grand Operating, Inc. | Addison, TX 75001 | Oil & Gas Operator | Dec 2020 |
| 13 | Great Texas Crude Inc. | Fredericksbrg, TX 78624 | Oil & Gas Operator | Oct 2025 |
| 14 | Green Exploration Company | Austin, TX 78711 | Oil & Gas Operator | Oct 2025 |
| 15 | Grimes Energy Company | Abilene, TX 79604 | Oil & Gas Operator | Mar 2005 |
| 16 | Gulf Resource Recovery Corp. | Dickinson, TX 77539 | Oil & Gas Operator | Oct 2025 |
| 17 | Gulf Shore Petro. Oper. Co., Inc | Woodland HLS, CA 91367 | Oil & Gas Operator | Apr 1998 |
| 18 | Gulf States Production Company | Houston, TX 77027 | Oil & Gas Operator | Aug 1997 |