| 1 | G E Operating, Inc. | Graham, TX 76450 | Oil & Gas Operator | May 2020 |
| 2 | G.A.P. Production LLC | Sourlake, TX 77659 | Oil Operator | Mar 2025 |
| 3 | Gaither Petroleum Corporation | Katy, TX 77493 | Oil & Gas Operator | Mar 2025 |
| 4 | Galloway Energy Co. | Tomball, TX 77377 | Oil & Gas Operator | Mar 2025 |
| 5 | Gardner Energy Corporation | Houston, TX 77024 | Oil & Gas Operator | Mar 1999 |
| 6 | Garrison LTD. | San Antonio, TX 78257 | Oil & Gas Operator | Mar 2025 |
| 7 | Gary Oil & Gas | Deer Park, TX 77536 | Oil & Gas Operator | Mar 2025 |
| 8 | Gcer Onshore, LLC | Houston, TX 77002 | Oil & Gas Operator | Dec 2015 |
| 9 | Gei Management Co., Inc. | Houston, TX 77024 | Oil & Gas Operator | Sep 1993 |
| 10 | Gemarmi Inc. | Cypress, TX 77433 | Oil & Gas Operator | Mar 2025 |
| 11 | General Atlantic Resources Inc | Denver, CO 80202 | Oil & Gas Operator | Jan 2022 |
| 12 | Genesis Producing Company | Houston, TX 77024 | Oil & Gas Operator | Oct 2007 |
| 13 | Geo Asset Management, Inc. | Katy, TX 77493 | Oil & Gas Operator | Mar 2025 |
| 14 | Geo Engineering, Inc. | Houston, TX 77027 | Oil & Gas Operator | Jun 2009 |
| 15 | Glenn, Wayne E. & Assoc., Inc. | Dickinson, TX 77539 | Oil & Gas Operator | Jun 2005 |
| 16 | Glickenhaus Energy Corporation | Houston, TX 77027 | Oil & Gas Operator | Mar 2025 |
| 17 | Goldking Operating Company, Inc. | Houston, TX 77002 | Oil & Gas Operator | Jun 2007 |
| 18 | Goldking Prod. Co. | Houston, TX 77002 | Oil & Gas Operator | Apr 1998 |
| 19 | Good Ol'Boys Oil Company | Houston, TX 77057 | Oil & Gas Operator | Mar 2025 |
| 20 | Goodrich Oil Company | Shreveport, LA 71101 | Oil & Gas Operator | Nov 2001 |
| 21 | Goodrich Petroleum Company | Houston, TX 77002 | Oil & Gas Operator | Feb 2022 |
| 22 | Gordy Oil Company | Houston, TX 77007 | Oil & Gas Operator | Mar 2025 |
| 23 | Gould Oil Inc. | Wichita, KS 67278 | Oil & Gas Operator | Oct 2019 |
| 24 | Graward Operating, Inc. | Tyler, TX 75702 | Oil & Gas Operator | Mar 2025 |
| 25 | Great Western Onshore Inc | Houston, TX 77002 | Oil & Gas Operator | Mar 2008 |
| 26 | Greenhill Petroleum Corporation | Houston, TX 77077 | Oil & Gas Operator | Jan 1998 |
| 27 | Grimes Energy Company | Abilene, TX 79604 | Oil & Gas Operator | Mar 2005 |
| 28 | Gruy Petroleum Management Co. | Irving, TX 75014 | Oil & Gas Operator | Nov 2014 |
| 29 | Gulfmark Energy Inc | Houston, TX 77027 | Gas Operator | Apr 2023 |