| 4701 | Wynn-Crosby Operating, LTD. | Dallas, TX 75201 | Oil & Gas Operator | Sep 2026 |
| 4702 | Xanadu Exploration Company | Broken Arrow, OK 74014 | Oil & Gas Operator | Jul 2026 |
| 4703 | Xenex Incorporat | | Oil Operator | Mar 1991 |
| 4704 | Xenia Corporation, The | Garnett, KS 66032 | Oil Operator | Jan 2001 |
| 4705 | Xeric Oil & Gas Corporation | Midland, TX 79702 | Oil & Gas Operator | Apr 2014 |
| 4706 | Xog Operating LLC | Midland, TX 79702 | Oil & Gas Operator | Sep 2026 |
| 4707 | XTO Energy Inc. | Spring, TX 77389 | Oil & Gas Operator | Sep 2026 |
| 4708 | Yager Company | Hutchinson, KS 67502 | Oil & Gas Operator | Dec 2000 |
| 4709 | Yale Oil Association, Inc. | Oklahoma City, OK 73105 | Oil & Gas Operator | Jul 2026 |
| 4710 | Yearout, Dwain L. | South Haven, KS 67140 | Oil Operator | Apr 2026 |
| 4711 | Yocham Oil Company | | Oil Operator | May 2026 |
| 4712 | Yoder Oil Compan | | Oil Operator | Sep 1988 |
| 4713 | Yoder, Alvin G. | Welda, KS 66091 | Oil Operator | Sep 2025 |
| 4714 | Yost Oil Operati | | Oil Operator | Jul 1990 |
| 4715 | Yost Oil Operations, Inc. | Russell, KS 67665 | Oil Operator | May 1999 |
| 4716 | Yost, M. A. | Russell, KS 67665 | Oil Operator | Aug 1990 |
| 4717 | Young Petroleum Service, LLC | Wichita, KS 67212 | Oil & Gas Operator | Sep 2023 |
| 4718 | Young, Harvey L. | Erie, KS 66733 | Oil Operator | Feb 2008 |
| 4719 | Younger Bernard | | Oil Operator | Nov 1992 |
| 4720 | Younger Energy C | | Oil & Gas Operator | Dec 1996 |
| 4721 | Younger Energy Company | Wichita, KS 67206 | Oil & Gas Operator | Sep 2026 |
| 4722 | Yukon Properties LLC | Villa Park, CA 92861 | Oil & Gas Operator | Sep 2017 |
| 4723 | Yuma Oil Company | El Dorado, KS 67042 | Oil Operator | Apr 1993 |
| 4724 | Z & L Oil LLC | Longton, KS 67352 | Oil Operator | May 2026 |
| 4725 | Zeiders Bros. Oil & Gas Company, L.L.C. | Edmond, OK 73003 | Oil & Gas Operator | Jun 2026 |
| 4726 | Zenergy, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Jul 2026 |
| 4727 | Zenith Drilling | | Oil & Gas Operator | Aug 1995 |
| 4728 | Zenith Drilling Corporation | Wichita, KS 67206 | Oil & Gas Operator | May 2026 |
| 4729 | Zeta Energy LLC | Ashland, OR 97520 | Oil Operator | May 2026 |
| 4730 | Zetetic Partners, LTD. | Georgetown, TX 78626 | Oil Operator | Dec 2018 |
| 4731 | Zinke & Trumbo L | | Oil & Gas Operator | Nov 2000 |
| 4732 | Zinszer Oil Co., Inc. | Hays, KS 67601 | Oil Operator | Dec 2019 |
| 4733 | Zinszer Oil Comp | | Oil Operator | Aug 1985 |
| 4734 | Zlab, Adolph | Yates Center, KS 66783 | Oil Operator | Jul 1997 |
| 4735 | Zoandra Petroleu | | Oil & Gas Operator | May 1993 |
| 4736 | Zorger, Gerald W. | Wichita, KS 67202 | Oil & Gas Operator | Apr 1985 |
| 4737 | Zu, LLC | Hays, KS 67601 | Oil Operator | May 2026 |