| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Westport Petrole | Oil Operator | Feb 1985 | |
| 2 | Wilkinson Energy LLC | Dodgeville, WI 53533 | Oil Operator | Oct 2024 |
| 3 | William G Smith Oil, LLC | Osawatomie, KS 66064 | Oil Operator | Apr 2014 |
| 4 | Williams Gas Pipeline Central, Inc. | Shawnee Mission, KS 66215 | Oil Operator | Sep 2010 |
| 5 | Womelsdorf Oil | Welda, KS 66091 | Oil Operator | Apr 1999 |