| Lovett H. E. #1042-495-32798 | Basin Oil & Gas Operating LLC only | WinklerKeystone (Consolidated) | ActiveGas | 5,608 | Apr 28, 2026 | 3 | Jul 2026 |
| Jake #142-495-33561 | Mas Operating Co. only | WinklerKeystone (Consolidated) | ActiveOil | 5,595 | Mar 29, 2016 | 2 | Jul 2026 |
| Zachary Estate #142-495-10005 | Mas Operating Co. only | WinklerKeystone (Consolidated) | ActiveOil | 8,294 | Mar 27, 2015 | 2 | Jul 2026 |
| Baird W. E. #1873W42-495-31434 | Basin Oil & Gas Operating LLC only | WinklerKeystone (Consolidated) | ActiveInjection | 5,498 | Feb 17, 2015 | 4 | Jul 2026 |
| Bashara-Prothro #742-495-32815 | Formentera Operations LLC only | WinklerKeystone (Consolidated) | ActiveOil | 5,500 | Sep 26, 2014 | 3 | Jul 2026 |
| Baird W. E. #194942-495-31211 | Basin Oil & Gas Operating LLC only | WinklerKeystone (Consolidated) | Shut inOil | 5,500 | Sep 2, 2014 | 3 | Jul 2026 |
| East Keystone (San a Holt Unit) #912HZ42-495-30339 | Formentera Operations LLC only | WinklerKeystone (Consolidated) | Shut inOil | 4,900 | Aug 31, 2011 | 2 | Jul 2026 |
| East Keystone (San a Holt Unit) #816HZ42-495-30319 | Formentera Operations LLC only | WinklerKeystone (Consolidated) | Shut inOil | 5,300 | Aug 30, 2011 | 2 | Jul 2026 |
| East Keystone (San a Holt Unit) #911HZ42-495-30340 | Formentera Operations LLC only | WinklerKeystone (Consolidated) | Shut inOil | 5,450 | May 3, 2011 | 2 | Jul 2026 |
| East Keystone(san a Holt Unit) #833HHZ42-495-30318 | Formentera Operations LLC only | WinklerKeystone (San Andres) | ActiveOil | 4,297 | Apr 8, 2011 | 3 | Jul 2026 |
| Baird W. E. #1374W42-495-31152 | Basin Oil & Gas Operating LLC only | WinklerKeystone (Consolidated) | ActiveInjection | 5,449 | Dec 10, 2009 | 2 | Jul 2026 |
| Keystone Holt Unit #9359HHZ42-495-10051 | Basin Oil & Gas Operating LLC only | WinklerKeystone (Consolidated) | Shut inOil | 9,936 | Mar 3, 2008 | 1 | Jul 2026 |
| Zachary Estate #242-495-33283 | Mas Operating Co. only | WinklerKeystone (Consolidated) | ActiveOil | 6,025 | Feb 21, 2008 | 1 | Jul 2026 |
| Walton J. B. #934342-495-31420 | Hilcorp Energy Company only | WinklerKeystone SW. (San Andres) | PluggedOil | 5,400 | Sep 26, 2006 | 2 | Jul 2026 |
| Keystone Holt Unit #253HHZ42-495-03693 | Basin Oil & Gas Operating LLC only | WinklerKeystone (Consolidated) | ActiveOil | 4,623 | May 11, 2006 | 1 | Jul 2026 |
| Keystone Holt Unit #9356HHZ42-495-32759 | Basin Oil & Gas Operating LLC only | WinklerKeystone (Consolidated) | ActiveOil | 4,910 | May 11, 2006 | 2 | Jul 2026 |
| Baird W. E. #137642-495-31273 | Basin Oil & Gas Operating LLC only | WinklerKeystone (Consolidated) | Shut inOil | 5,503 | Dec 16, 2005 | 2 | Jul 2026 |
| Walton J. B. #934242-495-31419 | Hilcorp Energy Company only | WinklerKeystone SW. (San Andres) | PluggedOil | 5,400 | Apr 8, 2004 | 3 | Jul 2026 |
| Campbell Seth #6142-495-32434 | Hilcorp Energy Company only | WinklerKeystone (Consolidated) | ActiveInjection | 5,400 | Jan 14, 2004 | 2 | Jul 2026 |
| East Keystone (San a Holt Unit) #70242-495-32526 | Formentera Operations LLC only | WinklerKeystone (Consolidated) | Shut inOil | 5,190 | Oct 1, 2003 | 2 | Jul 2026 |
| East Keystone (San a Holt Unit) #130142-495-32923 | Formentera Operations LLC only | WinklerKeystone (Consolidated) | ActiveOil | 5,350 | Jul 9, 2003 | 1 | Jul 2026 |
| Bashara M. J. #35W42-495-03711 | Hilcorp Energy Company only | WinklerKeystone (San Andres) | PluggedOil | 4,609 | Jan 2, 2003 | 2 | Jul 2026 |
| Baird W. E. #1248W42-495-31149 | Basin Oil & Gas Operating LLC only | WinklerKeystone (Consolidated) | ActiveInjection | 5,500 | Oct 2, 2002 | 2 | Jul 2026 |
| East Keystone(san a Holt Unit) #120242-495-30342 | Merit Energy Company only | WinklerKeystone (Holt) | PluggedOil | 5,600 | Jul 16, 2002 | 1 | Dec 2015 |
| East Keystone (San a Holt Unit) #120442-495-30382 | Formentera Operations LLC only | WinklerKeystone (Consolidated) | PluggedOil | 5,600 | Jul 16, 2002 | 1 | Jul 2026 |
| J.J. Perkins C #4A42-495-32550 | Formentera Operations LLC only | WinklerKeystone (San Andres) | Shut inOil | 5,200 | Jun 5, 2002 | 4 | Jul 2026 |
| Baird W. E. #1959W42-495-32860 | Basin Oil & Gas Operating LLC only | WinklerKeystone (Consolidated) | ActiveInjection | 5,600 | May 17, 2002 | 3 | Jul 2026 |
| Baird W. E. #196042-495-32861 | Basin Oil & Gas Operating LLC only | WinklerKeystone (Consolidated) | Shut inOil | 5,600 | May 17, 2002 | 3 | Jul 2026 |
| Lovett H. E. #842-495-32783 | Basin Oil & Gas Operating LLC only | WinklerKeystone (Consolidated) | ActiveOil | 10,400 | May 15, 2002 | 2 | Jul 2026 |
| Lovett-Whaley #142-495-05163 | Devon Energy Production Co L.P. only | WinklerKeystone (Holt) | PluggedGas | 10,647 | Apr 1, 2002 | 4 | Nov 2014 |
| East Keystone (San a Holt Unit) #83142-495-05303 | Formentera Operations LLC only | WinklerKeystone (Consolidated) | Shut inOil | 10,280 | Oct 24, 2001 | 2 | Jul 2026 |
| Keystone Holt Unit #120442-495-03431 | Basin Oil & Gas Operating LLC only | WinklerKeystone (Consolidated) | PluggedOil | 8,080 | Jun 29, 2001 | 1 | Jul 2026 |
| East Keystone (San a Holt Unit) #80142-495-32566 | Formentera Operations LLC only | WinklerKeystone (Consolidated) | Shut inOil | 5,200 | May 31, 2001 | 3 | Jul 2026 |
| East Keystone (San a Holt Unit) #83042-495-32592 | Formentera Operations LLC only | WinklerKeystone (Consolidated) | ActiveInjection | 5,350 | Feb 12, 2001 | 2 | Jul 2026 |
| East Keystone (San a Holt Unit) #70442-495-32481 | Formentera Operations LLC only | WinklerKeystone (Consolidated) | ActiveInjection | 5,150 | Dec 20, 2000 | 3 | Jul 2026 |
| East Keystone (San a Holt Unit) #90542-495-32539 | Formentera Operations LLC only | WinklerKeystone (Consolidated) | Shut inOil | 5,600 | Dec 20, 2000 | 2 | Jul 2026 |
| East Keystone (San a Holt Unit) #82942-495-32507 | Formentera Operations LLC only | WinklerKeystone (Consolidated) | ActiveInjection | 5,300 | Dec 19, 2000 | 3 | Jul 2026 |
| Baird W. E. #187842-495-32827 | Basin Oil & Gas Operating LLC only | WinklerKeystone (Consolidated) | Shut inOil | 5,600 | Dec 5, 2000 | 2 | Jul 2026 |
| East Keystone (San a Holt Unit) #90142-495-32594 | Formentera Operations LLC only | WinklerKeystone (Consolidated) | ActiveInjection | 5,400 | Nov 8, 2000 | 2 | Jul 2026 |
| Trinity a Unit #142-495-32560 | Formentera Operations LLC only | WinklerKeystone (San Andres) | Shut inOil | 5,360 | May 16, 2000 | 2 | Jul 2026 |
| Bashara-Prothro #142-495-03295 | Formentera Operations LLC only | WinklerKeystone (Consolidated) | ActiveInjection | 9,080 | May 3, 2000 | 4 | Jul 2026 |
| Walton J. B. -C- #10X42-495-32557 | Hilcorp Energy Company only | WinklerKeystone (San Andres) | PluggedOil | 5,500 | Apr 17, 2000 | 2 | Jul 2026 |
| Walton J. B. -C- #1242-495-32558 | Hilcorp Energy Company only | WinklerKeystone (San Andres) | PluggedOil | 5,400 | Apr 17, 2000 | 2 | Jul 2026 |
| Walton J. B. -C- #1142-495-32559 | Hilcorp Energy Company only | WinklerKeystone (San Andres) | ActiveOil | 5,351 | Apr 17, 2000 | 2 | Jul 2026 |
| East Keystone (San a Holt Unit) #90942-495-32763 | Formentera Operations LLC only | WinklerKeystone (Consolidated) | ActiveInjection | 5,405 | Jul 15, 1999 | 2 | Jul 2026 |
| East Keystone (San a Holt Unit) #91342-495-32762 | Formentera Operations LLC only | WinklerKeystone (Consolidated) | ActiveInjection | 5,403 | Jul 13, 1999 | 2 | Jul 2026 |
| Keystone Holt Unit #935342-495-32760 | Basin Oil & Gas Operating LLC only | WinklerKeystone (Consolidated) | ActiveOil | 4,976 | Jun 24, 1999 | 1 | Jul 2026 |
| Keystone Holt Unit #935842-495-32756 | Basin Oil & Gas Operating LLC only | WinklerKeystone (Consolidated) | ActiveOil | 5,065 | Jun 17, 1999 | 1 | Jul 2026 |
| Keystone Holt Unit #935242-495-32758 | Basin Oil & Gas Operating LLC only | WinklerKeystone (Consolidated) | ActiveOil | 5,145 | Jun 17, 1999 | 1 | Jul 2026 |
| Keystone Holt Unit #935742-495-32755 | Basin Oil & Gas Operating LLC only | WinklerKeystone (Consolidated) | Shut inOil | 4,900 | Jun 16, 1999 | 1 | Jul 2026 |