| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | W. L. Estis | Oil & Gas Operator | Dec 1999 | |
| 2 | Wagner Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | May 2024 |
| 3 | White Oak Operating Company LLC | Houston, TX 77077 | Oil & Gas Operator | May 2024 |
| 4 | WRT Energy Corporation | Oklahoma City, OK 73118 | Oil & Gas Operator | May 1998 |