| 1 | Gaither Petroleum Corporation | Katy, TX 77493 | Oil & Gas Operator | Oct 2025 |
| 2 | Gantt Operating Company, Inc. | Houston, TX 77018 | Oil & Gas Operator | Oct 2025 |
| 3 | Gary Oil & Gas | Deer Park, TX 77536 | Oil & Gas Operator | Oct 2025 |
| 4 | Gasper Rice Resources, LTD. | Houston, TX 77068 | Oil & Gas Operator | Oct 2025 |
| 5 | Gemini Exploration Company | Dallas, TX 75219 | Oil & Gas Operator | Mar 1997 |
| 6 | Geo-Graphic Production, Inc. | Gonzales, TX 78629 | Oil & Gas Operator | Oct 2025 |
| 7 | Geosouthern Energy Corporation | The Woodlands, TX 77380 | Oil & Gas Operator | Oct 2025 |
| 8 | Ginger Petroleum Company, Inc. | La Grange, TX 78945 | Oil & Gas Operator | Oct 2025 |
| 9 | Glenco Oil & Gas Company | Seguin, TX 78155 | Oil & Gas Operator | Dec 1994 |
| 10 | Glenn, Wayne E. & Assoc., Inc. | Dickinson, TX 77539 | Oil & Gas Operator | Jun 2005 |
| 11 | Great West Energy & Expl., Inc. | Addison, TX 75001 | Oil & Gas Operator | Mar 2008 |
| 12 | Greenbriar Energy Inc. | Houston, TX 77098 | Oil & Gas Operator | Feb 2004 |
| 13 | Gulfstar Properties, Inc. | San Antonio, TX 78229 | Oil & Gas Operator | Oct 2025 |