| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Walrath Oil Co. LLC | Oil Operator | Oct 2025 | |
| 2 | West American Energy Corporation | Oil & Gas Operator | Oct 2025 | |
| 3 | West Coast Oil Company | Oil Operator | Dec 1996 | |
| 4 | West Energy Operating LLC | Oil & Gas Operator | Oct 2025 | |
| 5 | Western Continental Operating Company | Oil & Gas Operator | Dec 2007 | |
| 6 | Western Discovery USA Inc. | Oil & Gas Operator | Jan 2018 | |
| 7 | Western States International Inc. | Oil & Gas Operator | Sep 2025 | |
| 8 | Whisler Enterprise Company | Erie, CO 80516 | Oil & Gas Operator | Oct 2025 |
| 9 | William K. Barker & Associates | Oil & Gas Operator | Dec 1986 | |
| 10 | Woodward Petroleum | Oil & Gas Operator | Dec 2003 | |
| 11 | Worldwide Energy Corporation | Freer, TX 78357 | Oil & Gas Operator | Jan 1997 |