| 4801 | Wrestler Ronald | | Oil Operator | Dec 1994 |
| 4802 | Wrestler, David L., A General Partnership | Humboldt, KS 66748 | Oil Operator | Jun 2025 |
| 4803 | Wrestler, Ronald D., A General Partnership | Elsmore, KS 66732 | Oil Operator | Apr 2025 |
| 4804 | Wright, Erbe & Oil Assoc.& Tubbs | Thayer, KS 66776 | Oil Operator | Apr 2005 |
| 4805 | Wykoma Oil Incor | | Oil & Gas Operator | Jul 1990 |
| 4806 | Wynn-Crosby Operating, LTD. | Dallas, TX 75201 | Oil & Gas Operator | Dec 2025 |
| 4807 | Xanadu Exploration Company | Broken Arrow, OK 74014 | Oil & Gas Operator | Sep 2025 |
| 4808 | Xenex Incorporat | | Oil Operator | Mar 1991 |
| 4809 | Xenia Corporation, The | Garnett, KS 66032 | Oil Operator | Jan 2001 |
| 4810 | Xeric Oil & Gas Corporation | Midland, TX 79702 | Oil & Gas Operator | Apr 2014 |
| 4811 | Xog Operating LLC | Midland, TX 79702 | Oil & Gas Operator | Dec 2025 |
| 4812 | XTO Energy Inc. | Spring, TX 77389 | Oil & Gas Operator | Dec 2025 |
| 4813 | Yager Company | Hutchinson, KS 67502 | Oil & Gas Operator | Dec 2000 |
| 4814 | Yale Oil Association, Inc. | Oklahoma City, OK 73105 | Oil & Gas Operator | Sep 2025 |
| 4815 | Yarnell Ditching | Erie, KS 66733 | Gas Operator | Mar 2000 |
| 4816 | Yearout, Dwain L. | South Haven, KS 67140 | Oil Operator | Feb 2025 |
| 4817 | Yocham Oil Company | | Oil Operator | Jun 2025 |
| 4818 | Yoder Oil Compan | | Oil Operator | Sep 1988 |
| 4819 | Yoder, Alvin G. | Welda, KS 66091 | Oil Operator | Dec 2024 |
| 4820 | Yost Oil Operati | | Oil Operator | Jul 1990 |
| 4821 | Yost Oil Operations, Inc. | Russell, KS 67665 | Oil Operator | May 1999 |
| 4822 | Yost, M. A. | Russell, KS 67665 | Oil Operator | Aug 1990 |
| 4823 | Young Petroleum Service, LLC | Wichita, KS 67212 | Oil & Gas Operator | Sep 2023 |
| 4824 | Young, Harvey L. | Erie, KS 66733 | Oil Operator | Feb 2008 |
| 4825 | Younger Bernard | | Oil Operator | Nov 1992 |
| 4826 | Younger Energy C | | Oil & Gas Operator | Dec 1996 |
| 4827 | Younger Energy Company | Wichita, KS 67206 | Oil & Gas Operator | Dec 2025 |
| 4828 | Yucca Petroleum | | Gas Operator | Jan 1994 |
| 4829 | Yukon Properties LLC | Villa Park, CA 92861 | Oil & Gas Operator | Sep 2017 |
| 4830 | Yuma Oil Company | El Dorado, KS 67042 | Oil Operator | Apr 1993 |
| 4831 | Z & L Oil LLC | Longton, KS 67352 | Oil Operator | Jun 2025 |
| 4832 | Zeiders Bros. Oil & Gas Company, L.L.C. | Edmond, OK 73003 | Oil & Gas Operator | Aug 2025 |
| 4833 | Zenergy Inc | Tulsa, OK 74136 | Oil & Gas Operator | Sep 2025 |
| 4834 | Zenith Drilling | | Oil & Gas Operator | Aug 1995 |
| 4835 | Zenith Drilling Corporation | Wichita, KS 67206 | Oil & Gas Operator | Jun 2025 |
| 4836 | Zeta Energy LLC | Ashland, OR 97520 | Oil Operator | Jun 2025 |
| 4837 | Zetetic Partners, LTD. | Georgetown, TX 78626 | Oil Operator | Dec 2018 |
| 4838 | Zinke & Trumbo L | | Oil & Gas Operator | Nov 2000 |
| 4839 | Zinszer Oil Co., Inc. | Hays, KS 67601 | Oil Operator | Dec 2019 |
| 4840 | Zinszer Oil Comp | | Oil Operator | Aug 1985 |
| 4841 | Zlab, Adolph | Yates Center, KS 66783 | Oil Operator | Jul 1997 |
| 4842 | Zoandra Petroleu | | Oil & Gas Operator | May 1993 |
| 4843 | Zorger, Gerald W. | Wichita, KS 67202 | Oil & Gas Operator | Apr 1985 |
| 4844 | Zu, LLC | Hays, KS 67601 | Oil Operator | Jun 2025 |