| 4501 | Wakefield Oil Company, Inc. | Winfield, KS 67156 | Oil Operator | Aug 1999 |
| 4502 | Walcher Oil, LC | Bellevue, WA 98009 | Oil & Gas Operator | May 2026 |
| 4503 | Walcher, Wayne E. | Wichita, KS 67202 | Oil & Gas Operator | May 2024 |
| 4504 | Walker Corporation (The) | Oklahoma City, OK 73156 | Oil & Gas Operator | May 2006 |
| 4505 | Walker Ervin G | | Oil Operator | Jul 1992 |
| 4506 | Walker Oil & Gas | Early, TX 76802 | Oil & Gas Operator | Dec 2002 |
| 4507 | Walker Tank Service, Inc | Utica, KS 67584 | Oil Operator | Oct 2025 |
| 4508 | Walker, Ervin Gilbert | Medicine Lodge, KS 67104 | Oil & Gas Operator | Apr 2020 |
| 4509 | Wallace Energy I | | Oil Operator | Mar 1990 |
| 4510 | Wallace Energy Inc | Denver, CO 80202-4327 | Oil Operator | Jun 2015 |
| 4511 | Wallace Oil & Ga | | Gas Operator | Oct 1995 |
| 4512 | Wallace Oil & Gas Inc | Oklahoma City, OK 73156 | Oil & Gas Operator | Sep 2026 |
| 4513 | Waller Oil, LLC | Stockton, KS 67669 | Oil Operator | Jun 2025 |
| 4514 | Walls, Charles A. | Caney, KS 67333 | Oil Operator | Aug 2016 |
| 4515 | Walters Drilling | | Oil Operator | Mar 1988 |
| 4516 | Walton, Tara | Copan, OK 74022 | Oil Operator | Feb 2026 |
| 4517 | Wapiti Petroleum, LLC | | Oil & Gas Operator | May 2026 |
| 4518 | War Cry, LLC | Russell, KS 67665 | Oil Operator | May 2026 |
| 4519 | Ward Feed Yard, Inc. | Larned, KS 67550 | Oil & Gas Operator | Mar 2016 |
| 4520 | Warhorse Petroleum Inc | Lafayette, CO 80026 | Oil Operator | May 2026 |
| 4521 | Warner Oil Prod | | Oil Operator | Apr 1995 |
| 4522 | Warren American Oil Company LLC | Tulsa, OK 74147 | Oil & Gas Operator | Sep 2026 |
| 4523 | Warren Corporation | Oklahoma City, OK 73118 | Oil & Gas Operator | Jan 2016 |
| 4524 | Warren, James E. | Arkansas City, KS 67005 | Oil Operator | Nov 2009 |
| 4525 | Watson Petroleum | | Oil & Gas Operator | Feb 1990 |
| 4526 | Watson, Ben | Blue Mound, KS 66010 | Oil Operator | Oct 2008 |
| 4527 | Watt Larry | Copan, OK 74022 | Oil Operator | Oct 2019 |
| 4528 | Watts Oil And Gas | Hardtner, KS 67057 | Oil Operator | Apr 2006 |
| 4529 | Watts Tank Truck Service, Inc. | Hamilton, KS 66853 | Oil Operator | Mar 2026 |
| 4530 | Wausau Development Corporation | Laurel, MS 39440 | Oil & Gas Operator | Sep 2019 |
| 4531 | Way Drilling Com | | Oil & Gas Operator | Mar 1993 |
| 4532 | Wayside Prod Com | | Oil Operator | May 1984 |
| 4533 | WD Oil Company I | | Oil Operator | Apr 1986 |
| 4534 | Webco Oil Compan | | Oil Operator | Sep 1989 |
| 4535 | Webco Oil Company, Inc. | Hoisington, KS 67544 | Oil Operator | May 2026 |
| 4536 | Weber Four Oil Co., Inc. | Hoisington, KS 67544 | Oil Operator | May 2026 |
| 4537 | Webster Oil LLC | Leon, KS 67074 | Oil Operator | May 2026 |
| 4538 | Wedel, Darold | Canton, KS 67428 | Oil Operator | Apr 2002 |
| 4539 | Weeks, VIrginia | Hoisington, KS 67544 | Oil Operator | Mar 2002 |
| 4540 | Wehmeyer, Gerald | Independence, KS 67301 | Oil Operator | Apr 2026 |
| 4541 | Weigel Oil Company, LLC | Gorham, KS 67640 | Oil Operator | May 2026 |
| 4542 | Weigel V Francis | | Oil Operator | Mar 1994 |
| 4543 | Weigel, V. Francis - Family Partnership | Gorham, KS 67640 | Oil Operator | Jul 2004 |
| 4544 | Weilert Enterpri | | Oil Operator | Sep 1988 |
| 4545 | Weilert Michael | | Oil Operator | Oct 1993 |
| 4546 | Weilert, S.R. | Wichita, KS 67216 | Oil Operator | Oct 1998 |
| 4547 | Weinkauf Petroleum, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Jul 2026 |
| 4548 | Well Tech Oil And Gas, Inc. | Wichita, KS 67206 | Oil Operator | Sep 2020 |
| 4549 | Wells Energy Com | | Oil & Gas Operator | Mar 1994 |
| 4550 | Wells Oil Compan | | Gas Operator | Sep 1984 |
| 4551 | Wells Oil, LLC | Gridley, KS 66852 | Oil Operator | May 2026 |
| 4552 | Wells-Battelstei | | Oil & Gas Operator | Mar 1993 |
| 4553 | Wellstar Corporation | Northglenn, CO 80233 | Oil & Gas Operator | Jul 2026 |
| 4554 | Wellsville Oil C | | Oil Operator | Dec 1996 |
| 4555 | Wellsville Oil Co | Wellsville, KS 66092 | Oil Operator | Sep 2000 |
| 4556 | Wellwin Drilling | | Oil & Gas Operator | Dec 1994 |
| 4557 | Wellwin Drilling Corporation | Wellington, KS 67152 | Oil & Gas Operator | May 2026 |
| 4558 | Wenert Trich Oil | | Oil & Gas Operator | Jul 1990 |
| 4559 | Werth Exploration Trust | | Oil Operator | Dec 2013 |
| 4560 | West 40 Production | Ness City, KS 67560 | Oil Operator | Apr 1998 |
| 4561 | West Kansas Oil | | Oil Operator | Jul 1992 |
| 4562 | West Kansas Oil Corporation | Oberlin, KS 67749 | Oil Operator | Aug 1998 |
| 4563 | West Plains Enterprises, Inc | Plains, KS 67869 | Oil & Gas Operator | Sep 2022 |
| 4564 | West Sunset Disposal, LLC | Amarillo, TX 79159 | Oil Operator | Oct 2003 |
| 4565 | West X, Inc. | Hays, KS 67601 | Oil Operator | Aug 1997 |
| 4566 | Westech Energy C | | Oil & Gas Operator | Dec 1996 |
| 4567 | Western Frontier Adventure, LLC | Easton, KS 66020 | Oil Operator | Dec 2019 |
| 4568 | Western Fuel & S | | Oil Operator | Oct 1987 |
| 4569 | Western Kansas E | | Oil Operator | Aug 1993 |
| 4570 | Western Oil & Gas Development Co. | Robinson, IL 62454 | Oil Operator | Jun 2000 |
| 4571 | Western Oil Comp | | Oil Operator | Aug 1989 |
| 4572 | Western Operating Company | Denver, CO 80204 | Oil & Gas Operator | May 2026 |
| 4573 | Western Pacific Farms, Inc. | Copeland, KS 67837 | Oil & Gas Operator | Apr 2020 |
| 4574 | Western Plains Resources LLC | Garden City, KS 67846 | Oil & Gas Operator | May 2026 |
| 4575 | Western Properti | | Oil Operator | Oct 1987 |
| 4576 | Westgate Oil Com | | Oil Operator | Mar 1993 |
| 4577 | Westgate Oil Company, Inc. | Eureka, KS 67045 | Oil & Gas Operator | May 2026 |
| 4578 | Westlake Energy Consultants, Inc. | Westlake VIllage, CA 91362 | Gas Operator | Dec 2019 |
| 4579 | Westmore Drillin | | Oil & Gas Operator | Oct 1995 |
| 4580 | Westmore Drilling Company, Inc. | Lawrence, KS 66047 | Oil & Gas Operator | Dec 2019 |
| 4581 | Weston Management & Operations Group | Centreville, MD 21617 | Oil Operator | May 1997 |
| 4582 | Westport Oil And Gas Company Inc | Denver, CO 80202 | Oil & Gas Operator | Feb 2002 |
| 4583 | Westport Oil Com | | Oil Operator | Feb 1994 |
| 4584 | Westport Petrole | | Oil Operator | Feb 1985 |
| 4585 | Weststar Resourc | | Oil Operator | Sep 1992 |
| 4586 | WGP-KHC, LLC | Houston, TX 77002 | Oil Operator | May 2017 |
| 4587 | Wheatbelt Invest | | Oil Operator | Mar 1991 |
| 4588 | Wheatland Oil & | | Oil & Gas Operator | Aug 1984 |
| 4589 | Wheeler Oil Company | Sperry, OK 74073-9417 | Oil & Gas Operator | May 2026 |
| 4590 | Whitaker Companies, Inc. | Humboldt, KS 66748 | Oil & Gas Operator | Apr 2025 |
| 4591 | Whitaker Enterpr | | Oil Operator | Oct 1992 |
| 4592 | Whitaker Harold | | Oil Operator | Aug 1990 |
| 4593 | Whitco Petroleum, LP | Leoti, KS 67861 | Oil & Gas Operator | May 2026 |
| 4594 | White & Ellis DR | | Oil & Gas Operator | Aug 1995 |
| 4595 | White & Ellis Drilling, Inc. | Wichita, KS 67206 | Oil & Gas Operator | May 2026 |
| 4596 | White Eagle Reso | | Oil Operator | Dec 1996 |
| 4597 | White Eagle Resources Corp. | Taos, NM 87571 | Oil & Gas Operator | Jun 2016 |
| 4598 | White Exploration Inc | Wichita, KS 67278 | Oil & Gas Operator | May 2026 |
| 4599 | White Gas & Oil | Mesa, AZ 85210 | Oil Operator | Oct 2006 |
| 4600 | White Hawk Oil C | | Oil & Gas Operator | Sep 1995 |