| 1 | W. J. Hamilton Operator | | Oil Operator | Aug 1978 |
| 2 | W. M. Elliott Jr. | | Oil & Gas Operator | Dec 2009 |
| 3 | W. R. Dudley | | Oil & Gas Operator | Aug 2025 |
| 4 | Wally Tucker | | Gas Operator | Dec 1994 |
| 5 | Walrath Oil Co. LLC | | Oil Operator | Sep 2025 |
| 6 | Warren E & P Inc | Dallas, TX 75240 | Oil & Gas Operator | Sep 2025 |
| 7 | Wat Khmer Temple* | | Oil Operator | Dec 2003 |
| 8 | Watt Mineral Holdings LLC | | Oil Operator | Sep 2025 |
| 9 | Wayne Ballinger | | Oil & Gas Operator | Dec 2000 |
| 10 | Weaver & Mola | | Oil Operator | Dec 1990 |
| 11 | Weaver & Weaver | | Oil & Gas Operator | Dec 1988 |
| 12 | Weir Oil Co. Inc. | | Oil & Gas Operator | Dec 2007 |
| 13 | Well Water Management | | Oil & Gas Operator | Aug 2025 |
| 14 | West American Energy Corporation | | Oil & Gas Operator | Sep 2025 |
| 15 | West Coast Oil Company | | Oil Operator | Dec 1996 |
| 16 | West Coast Operators Inc. | | Oil & Gas Operator | Sep 2025 |
| 17 | West Energy Operating LLC | | Oil & Gas Operator | Sep 2025 |
| 18 | West Newport Oil Co. | | Oil & Gas Operator | Aug 2025 |
| 19 | West Side Rentals | | Oil & Gas Operator | Aug 2025 |
| 20 | Western Avenue Properties | | Oil & Gas Operator | Dec 1993 |
| 21 | Western Continental Operating Company | | Oil & Gas Operator | Dec 2007 |
| 22 | Western Discovery USA Inc. | | Oil & Gas Operator | Jan 2018 |
| 23 | Western Metals Corporation | | Oil & Gas Operator | Sep 2025 |
| 24 | Western Oil Independent LLC | | Oil & Gas Operator | Dec 2016 |
| 25 | Western States International Inc. | | Oil & Gas Operator | Aug 2025 |
| 26 | Westside Farming Co. Inc. | | Gas Operator | Dec 1995 |
| 27 | Whisler Enterprise Company | Erie, CO 80516 | Oil & Gas Operator | Sep 2025 |
| 28 | White Knight Production LLC | Lafayette, LA 70505 | Oil & Gas Operator | Feb 2024 |
| 29 | Whiting Oil And Gas Corporation | Houston, TX 77002 | Oil & Gas Operator | Nov 2025 |
| 30 | Whiting Petroleum Corporation | Denver, CO 80290 | Oil & Gas Operator | Jan 2025 |
| 31 | Wilco-Placentia Oil Operator LLC | | Oil & Gas Operator | Sep 2025 |
| 32 | Wild Goose Storage LLC | | Gas Operator | Sep 2025 |
| 33 | William K. Barker & Associates | | Oil & Gas Operator | Dec 1986 |
| 34 | Williams Oil Company | Midland, TX 79710 | Oil & Gas Operator | Nov 2025 |
| 35 | Windrush Operating Co., L.L.C. | Longville, LA 70652 | Oil & Gas Operator | Nov 2025 |
| 36 | WM. H. Brayton Trust | | Oil & Gas Operator | Dec 2000 |
| 37 | Woodward Petroleum | | Oil & Gas Operator | Dec 2003 |
| 38 | Worldwide Energy Corporation | Freer, TX 78357 | Oil & Gas Operator | Jan 1997 |