| 1 | Gaither Petroleum Corporation | Katy, TX 77493 | Oil & Gas Operator | Apr 2026 |
| 2 | Galindo Brothers, Inc. | Alice, TX 78333 | Oil & Gas Operator | Apr 2026 |
| 3 | Galloway Energy Co. | Tomball, TX 77377 | Oil & Gas Operator | Apr 2026 |
| 4 | Garcia, A. H. | San Diego, TX 78384 | Oil & Gas Operator | May 2006 |
| 5 | Gasper Rice Resources, LTD. | Houston, TX 77068 | Oil & Gas Operator | Apr 2026 |
| 6 | Geiser Operating, Inc. | Portland, TX 78374 | Oil & Gas Operator | Sep 2019 |
| 7 | Genesis Producing Company | Houston, TX 77024 | Oil & Gas Operator | Oct 2007 |
| 8 | Geodyne Operating Company | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2015 |
| 9 | Gillring Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | May 1994 |
| 10 | Global Natural Resources Corp. | Houston, TX 77002 | Oil & Gas Operator | May 1998 |
| 11 | Go-Energy Co. | San Antonio, TX 78232 | Oil & Gas Operator | Mar 2002 |
| 12 | Golden Gas Production Company | Tulsa, OK 74136 | Oil & Gas Operator | Jan 2026 |
| 13 | Goldking Prod. Co. | Houston, TX 77002 | Oil & Gas Operator | Apr 1998 |
| 14 | Gonzalez, Elia G. Mineral Trust | Laredo, TX 78041 | Oil & Gas Operator | May 2012 |
| 15 | Gould Oil Inc. | Wichita, KS 67278 | Oil & Gas Operator | Oct 2019 |
| 16 | Great Northern Energy, Inc | Irving, TX 75039 | Oil & Gas Operator | Apr 2026 |
| 17 | Greehey & Company, LTD. | San Antonio, TX 78216 | Oil & Gas Operator | May 2020 |
| 18 | Green Exploration Company | Austin, TX 78711 | Oil & Gas Operator | Apr 2026 |
| 19 | Gruy Petroleum Management Co. | Irving, TX 75014 | Oil & Gas Operator | Nov 2014 |
| 20 | Guinn Operating Company | Spring Branch, TX 78070 | Oil & Gas Operator | Feb 2014 |
| 21 | Gulfstar Properties, Inc. | San Antonio, TX 78229 | Oil & Gas Operator | Apr 2026 |
| 22 | Gulftex Energy II, LP | San Antonio, TX 78258 | Oil & Gas Operator | Jan 2013 |
| 23 | Gulftex Energy III, LP | San Antonio, TX 78257 | Oil & Gas Operator | Jul 2018 |
| 24 | Gulftex Energy IV, LP | San Antonio, TX 78257 | Oil & Gas Operator | Jul 2019 |
| 25 | Gulftex Energy, LLC | San Antonio, TX 78257 | Oil & Gas Operator | Apr 2026 |