| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Walters Drilling | Oil Operator | Mar 1988 | |
| 2 | Wapiti Petroleum, LLC | Oil & Gas Operator | Sep 2025 | |
| 3 | Weilert Michael | Oil Operator | Oct 1993 | |
| 4 | Wheatland Oil & | Oil & Gas Operator | Aug 1984 | |
| 5 | White & Ellis DR | Oil & Gas Operator | Aug 1995 | |
| 6 | White & Ellis Drilling, Inc. | Wichita, KS 67206 | Oil & Gas Operator | Sep 2025 |
| 7 | Wilson Operating Company LLC | Tulsa, OK 74105 | Oil & Gas Operator | Feb 2026 |
| 8 | Woodman & Iannitti Oil Company | Great Bend, KS 67530 | Oil & Gas Operator | Jan 2003 |