| 1 | Gaither Petroleum Corporation | Katy, TX 77493 | Oil & Gas Operator | Jun 2025 |
| 2 | Galloway Energy Co. | Tomball, TX 77377 | 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 | Gasper Rice Resources, LTD. | Houston, TX 77068 | Oil & Gas Operator | Jun 2025 |
| 6 | Gec Operating, Inc. | Houston, TX 77024 | Oil & Gas Operator | Jun 2025 |
| 7 | Geiser Operating, Inc. | Portland, TX 78374 | Oil & Gas Operator | Sep 2019 |
| 8 | Gel Petroleum, Inc. | Bay City, TX 77414 | Oil & Gas Operator | Jun 2025 |
| 9 | Gemarmi Inc. | Cypress, TX 77433 | Oil & Gas Operator | Jun 2025 |
| 10 | Geodominion Petroleum | Corpus Chrsti, TX 78403 | Oil & Gas Operator | May 2012 |
| 11 | Geosouthern Energy Corporation | The Woodlands, TX 77380 | Oil & Gas Operator | Jun 2025 |
| 12 | Germany Operating Company | Houston, TX 77090 | Oil & Gas Operator | Sep 2011 |
| 13 | Gillring Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | May 1994 |
| 14 | Global Natural Resources Corp. | Houston, TX 77002 | Oil & Gas Operator | May 1998 |
| 15 | Goldking Operating Company, Inc. | Houston, TX 77002 | Oil & Gas Operator | Jun 2007 |
| 16 | Goldking Prod. Co. | Houston, TX 77002 | Oil & Gas Operator | Apr 1998 |
| 17 | Goldmark Energy Corporation | Spring, TX 77393 | Oil & Gas Operator | Jul 2010 |
| 18 | Goldston Oil Corporation | Houston, TX 77257 | Oil & Gas Operator | Jun 2025 |
| 19 | Gordy Oil Company | Houston, TX 77007 | Oil & Gas Operator | Jun 2025 |
| 20 | Great Western Drilling Co | Midland, TX 79701 | Oil & Gas Operator | Jun 2025 |
| 21 | Gruy Petroleum Management Co. | Irving, TX 75014 | Oil & Gas Operator | Nov 2014 |
| 22 | Gulf Coast Energy, Co. | Alvin, TX 77511 | Oil & Gas Operator | Apr 2021 |
| 23 | Gulf States Production Company | Houston, TX 77027 | Oil & Gas Operator | Aug 1997 |
| 24 | Gulfstar Properties, Inc. | San Antonio, TX 78229 | Oil & Gas Operator | Jun 2025 |