| 1 | W & W Prod Compa | | Oil Operator | Oct 1995 |
| 2 | W & W Production Company, General Partnership | Chanute, KS 66720 | Oil & Gas Operator | Dec 2025 |
| 3 | W M Petroleum LLC | Cedar Vale, KS 67024 | Oil Operator | Sep 2025 |
| 4 | W&W Oil Co | Denver City, TX 79323 | Oil Operator | Jun 2002 |
| 5 | W-R Oil Company | | Oil Operator | Jul 1990 |
| 6 | W. D. Short Oil Co. | | Oil Operator | Apr 2004 |
| 7 | W. R. Williams, Inc. | Amarillo, TX 79105 | Gas Operator | Dec 2019 |
| 8 | W.D. Short Oil Co., LLC | Oxford, KS 67119 | Oil & Gas Operator | Dec 2025 |
| 9 | W.J., Inc. | Ellis, KS 67637 | Oil Operator | Jan 2001 |
| 10 | W.R.A. Oil Co. | | Oil & Gas Operator | Mar 2025 |
| 11 | W4 Energy, LLC | Humboldt, KS 66748 | Gas Operator | Nov 2015 |
| 12 | W5 Oil, LLC | Olpe, KS 66865 | Oil Operator | Nov 2025 |
| 13 | Wabash Energy Corporation | Lawrenceville, IL 62439 | Oil & Gas Operator | Dec 2009 |
| 14 | Wachtman-Schroed | | Oil Operator | Aug 1986 |
| 15 | Wachtman-Schroeder, A General Partnership | Pawhuska, OK 74056 | Oil Operator | Dec 2025 |
| 16 | Waco Oil | | Oil Operator | Apr 1992 |
| 17 | Waddell, Eric F. | Natoma, KS 67651 | Oil Operator | Aug 1995 |
| 18 | Wainoco Oil & Ga | | Oil & Gas Operator | Jan 1993 |
| 19 | Wakefield Oil Company, Inc. | Winfield, KS 67156 | Oil Operator | Aug 1999 |
| 20 | Walcher Oil, LC | Bellevue, WA 98009 | Oil & Gas Operator | Nov 2025 |
| 21 | Walcher, Wayne E. | Wichita, KS 67202 | Oil & Gas Operator | May 2024 |
| 22 | Walker Corporation (The) | Oklahoma City, OK 73156 | Oil & Gas Operator | May 2006 |
| 23 | Walker Ervin G | | Oil Operator | Jul 1992 |
| 24 | Walker Oil & Gas | Early, TX 76802 | Oil & Gas Operator | Dec 2002 |
| 25 | Walker Tank Service, Inc | Utica, KS 67584 | Oil Operator | Oct 2025 |
| 26 | Walker, Ervin Gilbert | Medicine Lodge, KS 67104 | Oil & Gas Operator | Apr 2020 |
| 27 | Wallace Energy I | | Oil Operator | Mar 1990 |
| 28 | Wallace Energy Inc | Denver, CO 80202-4327 | Oil Operator | Jun 2015 |
| 29 | Wallace Oil & Ga | | Gas Operator | Oct 1995 |
| 30 | Wallace Oil & Gas Inc | Oklahoma City, OK 73156 | Oil & Gas Operator | Apr 2026 |
| 31 | Waller Oil, LLC | Stockton, KS 67669 | Oil Operator | Jun 2025 |
| 32 | Walls, Charles A. | Caney, KS 67333 | Oil Operator | Aug 2016 |
| 33 | Walters Drilling | | Oil Operator | Mar 1988 |
| 34 | Walton, Tara | Copan, OK 74022 | Oil Operator | Dec 2025 |
| 35 | Wapiti Petroleum, LLC | | Oil & Gas Operator | Dec 2025 |
| 36 | War Cry, LLC | Russell, KS 67665 | Oil Operator | Dec 2025 |
| 37 | Ward Feed Yard, Inc. | Larned, KS 67550 | Oil & Gas Operator | Mar 2016 |
| 38 | Warhorse Petroleum Inc | Lafayette, CO 80026 | Oil Operator | Dec 2025 |
| 39 | Warner Oil Prod | | Oil Operator | Apr 1995 |
| 40 | Warren American Oil Company LLC | Tulsa, OK 74147 | Oil & Gas Operator | Apr 2026 |
| 41 | Warren Corporation | Oklahoma City, OK 73118 | Oil & Gas Operator | Jan 2016 |
| 42 | Warren, James E. | Arkansas City, KS 67005 | Oil Operator | Nov 2009 |
| 43 | Watson Petroleum | | Oil & Gas Operator | Feb 1990 |
| 44 | Watson, Ben | Blue Mound, KS 66010 | Oil Operator | Oct 2008 |
| 45 | Watt Larry | Copan, OK 74022 | Oil Operator | Oct 2019 |
| 46 | Watts Oil And Gas | Hardtner, KS 67057 | Oil Operator | Apr 2006 |
| 47 | Watts Tank Truck Service, Inc. | Hamilton, KS 66853 | Oil Operator | Dec 2025 |
| 48 | Wausau Development Corporation | Laurel, MS 39440 | Oil & Gas Operator | Sep 2019 |
| 49 | Way Drilling Com | | Oil & Gas Operator | Mar 1993 |
| 50 | Wayside Prod Com | | Oil Operator | May 1984 |
| 51 | WD Oil Company I | | Oil Operator | Apr 1986 |
| 52 | Webco Oil Compan | | Oil Operator | Sep 1989 |
| 53 | Webco Oil Company, Inc. | Hoisington, KS 67544 | Oil Operator | Dec 2025 |
| 54 | Weber Four Oil Co., Inc. | Hoisington, KS 67544 | Oil Operator | Dec 2025 |
| 55 | Webster Oil LLC | Leon, KS 67074 | Oil Operator | Dec 2025 |
| 56 | Wedel, Darold | Canton, KS 67428 | Oil Operator | Apr 2002 |
| 57 | Weeks, VIrginia | Hoisington, KS 67544 | Oil Operator | Mar 2002 |
| 58 | Wehmeyer, Gerald | Independence, KS 67301 | Oil Operator | Aug 2024 |
| 59 | Weigel Oil Company, LLC | Gorham, KS 67640 | Oil Operator | Dec 2025 |
| 60 | Weigel V Francis | | Oil Operator | Mar 1994 |
| 61 | Weigel, V. Francis - Family Partnership | Gorham, KS 67640 | Oil Operator | Jul 2004 |
| 62 | Weilert Enterpri | | Oil Operator | Sep 1988 |
| 63 | Weilert Michael | | Oil Operator | Oct 1993 |
| 64 | Weilert, S.R. | Wichita, KS 67216 | Oil Operator | Oct 1998 |
| 65 | Weinkauf Petroleum, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Feb 2026 |
| 66 | Well Tech Oil And Gas, Inc. | Wichita, KS 67206 | Oil Operator | Sep 2020 |
| 67 | Wells Energy Com | | Oil & Gas Operator | Mar 1994 |
| 68 | Wells Oil Compan | | Gas Operator | Sep 1984 |
| 69 | Wells Oil, LLC | Gridley, KS 66852 | Oil Operator | Dec 2025 |
| 70 | Wells-Battelstei | | Oil & Gas Operator | Mar 1993 |
| 71 | Wellstar Corporation | Northglenn, CO 80233 | Oil & Gas Operator | Feb 2026 |
| 72 | Wellsville Oil C | | Oil Operator | Dec 1996 |
| 73 | Wellsville Oil Co | Wellsville, KS 66092 | Oil Operator | Sep 2000 |
| 74 | Wellwin Drilling | | Oil & Gas Operator | Dec 1994 |
| 75 | Wellwin Drilling Corporation | Wellington, KS 67152 | Oil & Gas Operator | Dec 2025 |
| 76 | Wenert Trich Oil | | Oil & Gas Operator | Jul 1990 |
| 77 | Werth Exploration Trust | | Oil Operator | Dec 2013 |
| 78 | West 40 Production | Ness City, KS 67560 | Oil Operator | Apr 1998 |
| 79 | West Kansas Oil | | Oil Operator | Jul 1992 |
| 80 | West Kansas Oil Corporation | Oberlin, KS 67749 | Oil Operator | Aug 1998 |
| 81 | West Plains Enterprises, Inc | Plains, KS 67869 | Oil & Gas Operator | Sep 2022 |
| 82 | West Sunset Disposal, LLC | Amarillo, TX 79159 | Oil Operator | Oct 2003 |
| 83 | West X, Inc. | Hays, KS 67601 | Oil Operator | Aug 1997 |
| 84 | Westech Energy C | | Oil & Gas Operator | Dec 1996 |
| 85 | Western Frontier Adventure, LLC | Easton, KS 66020 | Oil Operator | Dec 2019 |
| 86 | Western Fuel & S | | Oil Operator | Oct 1987 |
| 87 | Western Kansas E | | Oil Operator | Aug 1993 |
| 88 | Western Oil & Gas Development Co. | Robinson, IL 62454 | Oil Operator | Jun 2000 |
| 89 | Western Oil Comp | | Oil Operator | Aug 1989 |
| 90 | Western Operating Company | Denver, CO 80204 | Oil & Gas Operator | Dec 2025 |
| 91 | Western Pacific Farms, Inc. | Copeland, KS 67837 | Oil & Gas Operator | Apr 2020 |
| 92 | Western Plains Resources LLC | Garden City, KS 67846 | Oil & Gas Operator | Dec 2025 |
| 93 | Western Properti | | Oil Operator | Oct 1987 |
| 94 | Westgate Oil Com | | Oil Operator | Mar 1993 |
| 95 | Westgate Oil Company, Inc. | Eureka, KS 67045 | Oil & Gas Operator | Dec 2025 |
| 96 | Westlake Energy Consultants, Inc. | Westlake VIllage, CA 91362 | Gas Operator | Dec 2019 |
| 97 | Westmore Drillin | | Oil & Gas Operator | Oct 1995 |
| 98 | Westmore Drilling Company, Inc. | Lawrence, KS 66047 | Oil & Gas Operator | Dec 2019 |
| 99 | Weston Management & Operations Group | Centreville, MD 21617 | Oil Operator | May 1997 |
| 100 | Westport Oil And Gas Company Inc | Denver, CO 80202 | Oil & Gas Operator | Feb 2002 |