| 4901 | Wixson R J Compa | | Oil Operator | Jan 1989 |
| 4902 | Wixson, R. J., Co. | Wichita, KS 67278 | Oil Operator | Oct 2002 |
| 4903 | WM KS Energy Resources LLC | Shreveport, LA 71101 | Oil & Gas Operator | Nov 2019 |
| 4904 | Woco, Inc. | Wichita, KS 67214 | Oil Operator | Dec 2009 |
| 4905 | Wolfe Energy, LLC | | Oil Operator | Sep 2025 |
| 4906 | Wolfe Jimmy Ray | | Oil Operator | Nov 1995 |
| 4907 | Wolfe, Jimmy Ray, Deceased | Peru, KS 67360 | Oil Operator | Sep 2009 |
| 4908 | Wolfe, Leslie | Peru, KS 67360 | Oil Operator | Dec 2014 |
| 4909 | Wolfe, Ray | Longton, KS 67352 | Oil Operator | Jul 1988 |
| 4910 | Wollard-Abbott Crude, A General Partnership | Parker, KS 66072 | Oil Operator | May 2008 |
| 4911 | Womelsdorf Oil | Welda, KS 66091 | Oil Operator | Apr 1999 |
| 4912 | Wood Donald E | Independence, KS 67301 | Oil & Gas Operator | Dec 2024 |
| 4913 | Wood Energy, Inc. | Mount Vernon, IL 62864 | Oil Operator | Sep 2025 |
| 4914 | Wood McShane & T | | Oil Operator | Nov 1987 |
| 4915 | Wood, E. H., Jr. | Wichita, KS 67202 | Oil & Gas Operator | Sep 2010 |
| 4916 | Woodman & Iannit | | Oil & Gas Operator | Sep 1996 |
| 4917 | Woodman & Iannitti Oil Company | Great Bend, KS 67530 | Oil & Gas Operator | Jan 2003 |
| 4918 | Woods Oil | | Oil Operator | Sep 2025 |
| 4919 | Woolsey Operating Company, LLC | Wichita, KS 67226 | Oil & Gas Operator | Sep 2025 |
| 4920 | Woolsey Petroleum Corporation | Wichita, KS 67202 | Oil & Gas Operator | Sep 2025 |
| 4921 | Worldwide Energy | | Oil & Gas Operator | May 1989 |
| 4922 | Worsham Petroleum | Denver, CO 80209 | Gas Operator | Aug 2001 |
| 4923 | Worth Drilling | | Oil Operator | Jun 1993 |
| 4924 | Wortman Farms, LLC | Medicine Lodge, KS 67104 | Oil & Gas Operator | Dec 2017 |
| 4925 | Wren Investments | | Oil Operator | Feb 1991 |
| 4926 | Wrestler Ronald | | Oil Operator | Dec 1994 |
| 4927 | Wrestler, David L., A General Partnership | Humboldt, KS 66748 | Oil Operator | Sep 2025 |
| 4928 | Wrestler, Ronald D., A General Partnership | Elsmore, KS 66732 | Oil Operator | Apr 2025 |
| 4929 | Wright, Erbe & Oil Assoc.& Tubbs | Thayer, KS 66776 | Oil Operator | Apr 2005 |
| 4930 | Wykoma Oil Incor | | Oil & Gas Operator | Jul 1990 |
| 4931 | Wynn-Crosby Operating, LTD. | Dallas, TX 75201 | Oil & Gas Operator | Feb 2026 |
| 4932 | Xanadu Exploration Company | Broken Arrow, OK 74014 | Oil & Gas Operator | Dec 2025 |
| 4933 | Xenex Incorporat | | Oil Operator | Mar 1991 |
| 4934 | Xenia Corporation, The | Garnett, KS 66032 | Oil Operator | Jan 2001 |
| 4935 | Xeric Oil & Gas Corporation | Midland, TX 79702 | Oil & Gas Operator | Apr 2014 |
| 4936 | Xog Operating LLC | Midland, TX 79702 | Oil & Gas Operator | Feb 2026 |
| 4937 | XTO Energy Inc. | Spring, TX 77389 | Oil & Gas Operator | Feb 2026 |
| 4938 | Yager Company | Hutchinson, KS 67502 | Oil & Gas Operator | Dec 2000 |
| 4939 | Yale Oil Association, Inc. | Oklahoma City, OK 73105 | Oil & Gas Operator | Dec 2025 |
| 4940 | Yarnell Ditching | Erie, KS 66733 | Gas Operator | Mar 2000 |
| 4941 | Yearout, Dwain L. | South Haven, KS 67140 | Oil Operator | Aug 2025 |
| 4942 | Yellow Rose Energy, Inc. | Cottonwood Falls, KS 66845 | Gas Operator | Oct 1999 |
| 4943 | Yocham Oil Company | | Oil Operator | Sep 2025 |
| 4944 | Yoder Oil Compan | | Oil Operator | Sep 1988 |
| 4945 | Yoder, Alvin G. | Welda, KS 66091 | Oil Operator | Sep 2025 |
| 4946 | Yost Oil Operati | | Oil Operator | Jul 1990 |
| 4947 | Yost Oil Operations, Inc. | Russell, KS 67665 | Oil Operator | May 1999 |
| 4948 | Yost, M. A. | Russell, KS 67665 | Oil Operator | Aug 1990 |
| 4949 | Young Petroleum Service, LLC | Wichita, KS 67212 | Oil & Gas Operator | Sep 2023 |
| 4950 | Young, Harvey L. | Erie, KS 66733 | Oil Operator | Feb 2008 |
| 4951 | Younger Bernard | | Oil Operator | Nov 1992 |
| 4952 | Younger Energy C | | Oil & Gas Operator | Dec 1996 |
| 4953 | Younger Energy Company | Wichita, KS 67206 | Oil & Gas Operator | Feb 2026 |
| 4954 | Yucca Petroleum | | Gas Operator | Jan 1994 |
| 4955 | Yukon Properties LLC | Villa Park, CA 92861 | Oil & Gas Operator | Sep 2017 |
| 4956 | Yuma Oil Company | El Dorado, KS 67042 | Oil Operator | Apr 1993 |
| 4957 | Z & L Oil LLC | Longton, KS 67352 | Oil Operator | Sep 2025 |
| 4958 | Zander H Corpora | | Oil & Gas Operator | Oct 1985 |
| 4959 | Zeiders Bros. Oil & Gas Company, L.L.C. | Edmond, OK 73003 | Oil & Gas Operator | Nov 2025 |
| 4960 | Zenergy Inc | Tulsa, OK 74136 | Oil & Gas Operator | Dec 2025 |
| 4961 | Zenith Drilling | | Oil & Gas Operator | Aug 1995 |
| 4962 | Zenith Drilling Corporation | Wichita, KS 67206 | Oil & Gas Operator | Sep 2025 |
| 4963 | Zeta Energy LLC | Ashland, OR 97520 | Oil Operator | Sep 2025 |
| 4964 | Zetetic Partners, LTD. | Georgetown, TX 78626 | Oil Operator | Dec 2018 |
| 4965 | Zinke & Trumbo L | | Oil & Gas Operator | Nov 2000 |
| 4966 | Zinszer Oil Co., Inc. | Hays, KS 67601 | Oil Operator | Dec 2019 |
| 4967 | Zinszer Oil Comp | | Oil Operator | Aug 1985 |
| 4968 | Zlab, Adolph | Yates Center, KS 66783 | Oil Operator | Jul 1997 |
| 4969 | Zoandra Petroleu | | Oil & Gas Operator | May 1993 |
| 4970 | Zorger, Gerald W. | Wichita, KS 67202 | Oil & Gas Operator | Apr 1985 |
| 4971 | Zu, LLC | Hays, KS 67601 | Oil Operator | Sep 2025 |