| 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 | Garrison LTD. | San Antonio, TX 78257 | Oil & Gas Operator | Jun 2025 |
| 4 | Gasper Rice Resources, LTD. | Houston, TX 77068 | Oil & Gas Operator | Jun 2025 |
| 5 | Gcea, LLC | Graham, TX 76450 | Oil & Gas Operator | Mar 2008 |
| 6 | Geiselman, Grover J. | Richmond, TX 77469 | Oil & Gas Operator | Feb 1995 |
| 7 | Geiser Operating, Inc. | Portland, TX 78374 | Oil & Gas Operator | Sep 2019 |
| 8 | Geiser, D. Allen | Portland, TX 78374 | Oil & Gas Operator | Oct 2005 |
| 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 | Geosouthern Energy Corporation | The Woodlands, TX 77380 | Oil & Gas Operator | Jun 2025 |
| 12 | Gillring Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | May 1994 |
| 13 | Global Natural Resources Corp. | Houston, TX 77002 | Oil & Gas Operator | May 1998 |
| 14 | Go-Energy Co. | San Antonio, TX 78232 | Oil & Gas Operator | Mar 2002 |
| 15 | Goldking Prod. Co. | Houston, TX 77002 | Oil & Gas Operator | Apr 1998 |
| 16 | Goodnight Midstream Permian, LLC | Dallas, TX 75206 | Oil & Gas Operator | Jun 2025 |
| 17 | Goodrich Pet. Co. Of Louisiana | Houston, TX 77002 | Oil & Gas Operator | Mar 2008 |
| 18 | Graham Royalty LTD | Covington, LA 70434 | Oil & Gas Operator | Jul 2007 |
| 19 | Graward Operating, Inc. | Tyler, TX 75702 | Oil & Gas Operator | Jun 2025 |
| 20 | Green River Resources Inc. | Keystone, CO 80435 | Oil & Gas Operator | Jun 2025 |
| 21 | Greenbrier Oper. Co. | Dallas, TX 75229 | Oil & Gas Operator | Feb 2001 |
| 22 | Gribble Oil Corporation | Dallas, TX 75235 | Oil Operator | Aug 1994 |
| 23 | Griffin Petroleum Company | Midland, TX 79705 | Oil & Gas Operator | Jun 2025 |
| 24 | Grizzly Op Of Delaware, LLC | Houston, TX 77057 | Oil & Gas Operator | Mar 2021 |
| 25 | Gruy Petroleum Management Co. | Irving, TX 75014 | Oil & Gas Operator | Nov 2014 |
| 26 | Gulfstar Properties, Inc. | San Antonio, TX 78229 | Oil & Gas Operator | Jun 2025 |
| 27 | Gulftex Energy, LLC | San Antonio, TX 78257 | Oil & Gas Operator | Jun 2025 |