| 1 | G E Operating, Inc. | Graham, TX 76450 | Oil & Gas Operator | May 2020 |
| 2 | Gaither Petroleum Corporation | Katy, TX 77493 | Oil & Gas Operator | Jun 2025 |
| 3 | Gardner Energy Corporation | Houston, TX 77024 | Oil & Gas Operator | Mar 1999 |
| 4 | Garrison LTD. | San Antonio, TX 78257 | Oil & Gas Operator | Jun 2025 |
| 5 | Gary Oil & Gas | Deer Park, TX 77536 | Oil & Gas Operator | Jun 2025 |
| 6 | Gasper Rice Resources, LTD. | Houston, TX 77068 | Oil & Gas Operator | Jun 2025 |
| 7 | Gec Operating, Inc. | Houston, TX 77024 | Oil & Gas Operator | Jun 2025 |
| 8 | Geiser Operating, Inc. | Portland, TX 78374 | Oil & Gas Operator | Sep 2019 |
| 9 | Geodominion Petroleum | Corpus Chrsti, TX 78403 | Oil & Gas Operator | May 2012 |
| 10 | Geodyne Operating Company | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2015 |
| 11 | Geonatural Resources, Inc. | Dallas, TX 75240 | Oil & Gas Operator | Jun 2025 |
| 12 | Gillring Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | May 1994 |
| 13 | Goldking Prod. Co. | Houston, TX 77002 | Oil & Gas Operator | Apr 1998 |
| 14 | Goliad Operating Company | Houston, TX 77265 | Oil & Gas Operator | Aug 2003 |
| 15 | Graham Royalty LTD | Covington, LA 70434 | Oil & Gas Operator | Jul 2007 |
| 16 | Great Texas Crude Inc. | Fredericksbrg, TX 78624 | Oil & Gas Operator | Jun 2025 |
| 17 | Great Western Onshore Inc | Houston, TX 77002 | Oil & Gas Operator | Mar 2008 |
| 18 | Greenbrier Oper. Co. | Dallas, TX 75229 | Oil & Gas Operator | Feb 2001 |
| 19 | Gruy Petroleum Management Co. | Irving, TX 75014 | Oil & Gas Operator | Nov 2014 |
| 20 | Gulfstar Properties, Inc. | San Antonio, TX 78229 | Oil & Gas Operator | Jun 2025 |