| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Gamma Resources Inc. | Oklahoma City, OK 73120 | Oil & Gas Operator | Jan 2017 |
| 2 | Glenn Supply Com | Oil Operator | Apr 1989 | |
| 3 | Global Natural R | Oil & Gas Operator | Oct 1990 | |
| 4 | Glori Holdings, Inc. | Houston, TX 77042 | Oil Operator | Mar 2004 |
| 5 | Great Plains Pet | Oil & Gas Operator | Mar 1995 | |
| 6 | Great Plains Petroleum, Inc. | Snyder, TX 79549 | Oil & Gas Operator | Jun 2025 |
| 7 | Gruenerwald WM & | Oil & Gas Operator | Apr 1994 |