| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Wagner & Brown Limited Partnership | Midland, TX 79701 | Oil & Gas Operator | Feb 2013 |
| 2 | Warrego Oil & Gas LLC | Lander, WY 82520 | Oil Operator | May 2018 |
| 3 | Washakie Oil Company | Oil & Gas Operator | Dec 1989 | |
| 4 | Washington Energy Exploration | Oil & Gas Operator | Dec 1997 | |
| 5 | Wesco Operating, Inc. | Casper, WY 82602 | Oil & Gas Operator | Mar 2024 |
| 6 | Wesco Production LLC | Oil & Gas Operator | Feb 2024 | |
| 7 | Wexpro Company | Rock Springs, WY 82902-0458 | Oil & Gas Operator | Feb 2024 |
| 8 | Wind River Energy Commission | Oil Operator | Feb 2024 | |
| 9 | Wold Oil & Gas | Oil & Gas Operator | Oct 1996 | |
| 10 | Wold Oil Properties Inc | Denver, CO 80203 | Oil & Gas Operator | Feb 2018 |
| 11 | Wood River Oil & Refining Co | Oil & Gas Operator | Dec 1998 | |
| 12 | Wynn-Crosby Operating, LTD. | Dallas, TX 75201 | Oil & Gas Operator | Apr 2024 |