| Bashara M. J. -E- #7142-495-31942 | Hilcorp Energy Company only | WinklerKeystone (Consolidated) | ActiveOil | 9,000 | Feb 19, 2026 | 2 | Apr 2026 |
| McCutchen W.A. #542-495-04122 | Hilcorp Energy Company only | WinklerKeystone South | Shut inOil | 9,920 | Jul 12, 2019 | 1 | Apr 2026 |
| Jenkins B. F. #1042-495-03738 | Hilcorp Energy Company only | WinklerKeystone South | Shut inOil | 8,125 | May 17, 2019 | 1 | Oct 2023 |
| Walton J. B. #1842-495-03894 | Hilcorp Energy Company only | WinklerKeystone (Dev-McKee Cons) | Shut inOil | 9,948 | Jul 27, 2016 | 3 | Mar 2026 |
| South Keystone/Ellen/Unit #107342-495-01153 | Basin Oil & Gas Operating LLC only | WinklerKeystone (Ellenburger) | ActiveGas | 9,842 | Nov 18, 2011 | 1 | Apr 2026 |
| Jenkins B.F. #1042-495-00573 | Formentera Operations LLC only | WinklerKeystone (Dev-McKee Cons) | Shut inOil | 10,122 | Sep 30, 2011 | 1 | Apr 2026 |
| Walton J.B. a #542-495-04572 | Hilcorp Energy Company only | WinklerKeystone (Dev-McKee Cons) | ActiveOil | 10,011 | Aug 24, 2011 | 1 | Jan 2025 |
| Walton J.B. a #842-495-04483 | Hilcorp Energy Company only | WinklerKeystone (Dev-McKee Cons) | Shut inOil | 10,044 | Mar 17, 2011 | 2 | Jan 2025 |
| Walton J.B. a #742-495-04556 | Hilcorp Energy Company only | WinklerKeystone (Dev-McKee Cons) | ActiveGas | 10,004 | Mar 15, 2011 | 1 | Jan 2025 |
| Walton J. B. a #442-495-04569 | XTO Energy Inc. only | WinklerKeystone (Ellenburger) | PluggedGas | 9,830 | Apr 23, 2008 | 3 | Jul 2017 |
| South Keystone /Ellen/ Unit #140242-495-01162 | Basin Oil & Gas Operating LLC only | WinklerKeystone (Ellenburger) | Shut inOil | 10,008 | Aug 4, 2007 | 1 | Feb 2019 |
| South Keystone/Ellen/Unit #70142-495-04284 | Basin Oil & Gas Operating LLC only | WinklerKeystone (Ellenburger) | Temporarily abandonedGas | 9,998 | Aug 4, 2007 | 1 | Feb 2019 |
| Keystone-Jenkins #642-495-03773 | United Oil & Shale LLC only | WinklerKeystone (Colby) | Shut inOil | 8,560 | May 7, 2002 | 1 | Sep 2024 |
| Keystone Holt Unit #120442-495-03431 | Basin Oil & Gas Operating LLC only | WinklerKeystone (Consolidated) | PluggedOil | 8,080 | Jun 29, 2001 | 1 | Apr 2026 |
| Jenkins B.F. Etal #142-495-01839 | Hilcorp Energy Company only | WinklerKeystone (Dev-McKee Cons) | PluggedOil | 9,350 | Sep 20, 1999 | 1 | Jul 2022 |
| Keystone Holt Unit #662HZ42-495-03938 | Basin Oil & Gas Operating LLC only | WinklerKeystone (Consolidated) | Temporarily abandonedGas | 10,333 | Nov 30, 1998 | 1 | Jun 2020 |
| Pure-Walton #2 E42-495-00415 | XTO Energy Inc. only | WinklerKeystone (Ellenburger) | PluggedGas | 10,000 | May 18, 1998 | 3 | May 2021 |
| Keystone Silurian Unit #3142-495-04126 | Hilcorp Energy Company only | WinklerKeystone (Dev-McKee Cons) | PluggedOil | 7,730 | Feb 5, 1998 | 1 | Apr 2026 |
| Keystone Silurian Unit #3742-495-04128 | Hilcorp Energy Company only | WinklerKeystone (Dev-McKee Cons) | Shut inOil | 8,500 | Jan 2, 1998 | 1 | Apr 2026 |
| McCutchen W. A. #1542-495-04130 | Hilcorp Energy Company only | WinklerKeystone SW. (San Andres) | Shut inOil | 7,890 | Sep 15, 1997 | 1 | Jul 2025 |
| McCutchen W.A. #1S42-495-02277 | Teke Production LLC only | WinklerKeystone (San Andres) | PluggedOil | 4,600 | Jul 2, 1996 | 1 | Dec 2023 |
| Jenkins B. F. #1242-495-03742 | Hilcorp Energy Company only | WinklerKeystone (San Andres) | Shut inOil | 8,817 | Jan 3, 1995 | 1 | Feb 2019 |
| Walton J. B. #2842-495-03904 | Hilcorp Energy Company only | WinklerKeystone (Ellenburger) | Temporarily abandonedGas | 9,900 | Jan 26, 1994 | 3 | Jun 2020 |
| South Keystone /Ellen/ Unit #1064R42-495-01144 | Basin Oil & Gas Operating LLC only | WinklerKeystone (Ellenburger) | PluggedOil | 10,062 | Dec 9, 1993 | 1 | Feb 2019 |
| Jenkins B.F. Etal #242-495-01840 | Hilcorp Energy Company only | WinklerKeystone (Dev-McKee Cons) | Shut inOil | 9,999 | Sep 21, 1993 | 1 | Jul 2022 |
| Keystone Silurian Unit #5542-495-04287 | XTO Energy Inc. only | WinklerKeystone (Silurian) | PluggedOil | 9,878 | May 18, 1993 | 3 | Feb 2019 |
| Pure-Walton #10E42-495-00447 | XTO Energy Inc. only | WinklerKeystone (Ellenburger) | PluggedGas | 9,967 | Jan 19, 1993 | 2 | Apr 2021 |
| Talvez #642-495-03471 | Bopco L.P. only | WinklerKeystone (Devonian) | PluggedOil | 7,700 | Dec 7, 1992 | 1 | Jan 1998 |
| Bash #1842-495-31994 | Hilcorp Energy Company only | WinklerKeystone SW. (San Andres) | Shut inOil | 8,350 | Oct 28, 1992 | 2 | May 2007 |
| B A S H #742-495-03422 | Hilcorp Energy Company only | WinklerKeystone (Ellenburger) | Shut inOil | 10,030 | Sep 30, 1992 | 2 | Jul 2019 |
| Pure-Walton #5E42-495-00412 | Hilcorp Energy Company only | WinklerKeystone (Ellenburger) | Temporarily abandonedGas | 9,875 | Sep 25, 1991 | 2 | Dec 2022 |
| Pure-Walton #7E42-495-00451 | Hilcorp Energy Company only | WinklerKeystone (Ellenburger) | Shut inOil | 9,914 | Jun 21, 1991 | 1 | Apr 2021 |
| Walton J. B. #1742-495-03893 | Hilcorp Energy Company only | WinklerKeystone (Dev-McKee Cons) | ActiveOil | 9,893 | Dec 18, 1990 | 2 | Mar 2026 |
| Walton J. B. E #1A42-495-02383 | Argee Oil Company only | WinklerKeystone South (Wichita Albany) | PluggedOil | 6,800 | Nov 26, 1990 | 1 | — |
| Pure-Walton #3E42-495-00414 | Hilcorp Energy Company only | WinklerKeystone (Ellenburger) | Temporarily abandonedGas | 9,878 | Oct 2, 1990 | 1 | Apr 2021 |
| Pure Walton #6 E42-495-00452 | XTO Energy Inc. only | WinklerKeystone (Ellenburger) | PluggedGas | 9,780 | Jul 18, 1990 | 2 | Apr 2021 |
| Walton J. B. -E- #2D42-495-02387 | Verde Energy Corporation only | WinklerKeystone (Silurian) | PluggedOil | 7,900 | Oct 17, 1989 | 1 | — |
| Walton J. B. -a- #942-495-04532 | Arco Oil & Gas Co. only | WinklerKeystone (Silurian) | PluggedOil | 10,046 | Jul 26, 1989 | 1 | — |
| Bashara M.J. #842-495-03839 | Hilcorp Energy Company only | WinklerKeystone (Dev-McKee Cons) | Shut inOil | 9,940 | Sep 26, 1985 | 1 | Apr 2026 |
| Barnes Crum #142-495-04286 | Bepco L.P. only | WinklerKeystone (Devonian) | PluggedOil | 8,120 | May 17, 1985 | 1 | — |
| Bashara M. J. -B- #1942-495-03726 | Hilcorp Energy Company only | WinklerKeystone (Dev-McKee Cons) | ActiveOil | 9,019 | Sep 10, 1984 | 1 | Apr 2026 |
| Keystone -4- #142-495-31759 | BCP Resources LLC only | WinklerKeystone (Dev-McKee Cons) | ActiveOil | 9,100 | May 7, 1984 | 1 | Apr 2026 |
| Bashara M. J. -B- #2142-495-03817 | Hilcorp Energy Company only | WinklerKeystone (Dev-McKee Cons) | ActiveOil | 9,905 | Mar 9, 1984 | 1 | Apr 2026 |
| Jenkins Ben Etal -a- #1142-495-03739 | Hilcorp Energy Company only | WinklerKeystone (Dev-McKee Cons) | Shut inOil | 8,914 | Dec 12, 1983 | 1 | Apr 2026 |
| Walton J. B. #3142-495-03907 | Hilcorp Energy Company only | WinklerKeystone (Ellenburger) | Temporarily abandonedGas | 9,791 | Aug 22, 1983 | 2 | Aug 2024 |
| East Keystone (San a Holt Unit) #70142-495-05217 | Formentera Operations LLC only | WinklerKeystone (Consolidated) | Shut inOil | 10,041 | Oct 29, 1982 | 3 | Apr 2026 |
| Keystone Silurian Unit #2042-495-01150 | Hilcorp Energy Company only | WinklerKeystone (Dev-McKee Cons) | PluggedOil | 9,749 | Dec 30, 1980 | 1 | Apr 2026 |
| Bashara M.J. #25S42-495-03718 | Hilcorp Energy Company only | WinklerKeystone (Dev-McKee Cons) | PluggedOil | 9,925 | Oct 24, 1980 | 1 | Apr 2026 |
| Keystone Cattle Co. #142-495-00353 | BCP Resources LLC only | WinklerKeystone (Dev-McKee Cons) | ActiveOil | 8,500 | — | 0 | — |
| Keystone Cattle Co. #242-495-00354 | BCP Resources LLC only | WinklerKeystone (Dev-McKee Cons) | ActiveOil | 8,500 | — | 0 | — |