| Keystone Holt Unit O-10-20730 | Bopco, L.P. only | Keystone (Holt) | Winkler | 164 | 6.49M | 13.6M | Jan 1993 – Jan 2016 |
| East Keystone(san a Holt Unit) O-10-36780 | Merit Energy Company only | Keystone (Holt) | Winkler | 81 | 1.29M | 1.81M | Jan 2002 – Dec 2015 |
| Bashara-Prothro O-10-30317 | Merit Energy Company only | Keystone (Holt) | Winkler | 7 | 277K | 4M | Jan 1993 – Dec 2015 |
| Taylor "a" - Moss Unit O-10-34816 | Gruy Petroleum Management Co. only | Keystone (Holt) | Winkler | 3 | 128K | 363K | Jan 1996 – Apr 2002 |
| Taylor "A"/Waddell O-10-34999 | Gruy Petroleum Management Co. only | Keystone (Holt) | Winkler | 3 | 124K | 257K | Jul 1996 – Apr 2002 |
| Taylor-Moss Unit O-10-34731 | Gruy Petroleum Management Co. only | Keystone (Holt) | Winkler | 3 | 111K | 448K | Oct 1995 – Apr 2002 |
| Baird, W. E. O-10-36592 | Devon Energy Production Co, L.P. only | Keystone (Holt) | Winkler | 8 | 103K | 706K | Feb 2001 – Mar 2016 |
| Moss-Walton Unit O-10-34567 | Gruy Petroleum Management Co. only | Keystone (Holt) | Winkler | 2 | 97.7K | 299K | Jul 1995 – Apr 2002 |
| Zachary Estate O-10-34887 | Mas Operating Co. only | Keystone (Holt) | Winkler | 2 | 83K | 616K | Mar 1996 – Mar 2017 |
| Lovett, H. E. O-10-25201 | Devon Energy Production Co, L.P. only | Keystone (Holt) | Winkler | 4 | 79.3K | 1.56M | Jan 1993 – Mar 2016 |
| Moss-Taylor Unit O-10-34729 | Gruy Petroleum Management Co. only | Keystone (Holt) | Winkler | 1 | 75.8K | 293K | Jul 1995 – Apr 2002 |
| Bashara,j.m. O-10-23009 | Merit Energy Company only | Keystone (Holt) | — | 2 | 63.2K | 43.5K | Jan 1993 – Dec 2015 |
| Taylor, Mack -B- O-10-29574 | Gruy Petroleum Management Co. only | Keystone (Holt) | Winkler | 4 | 58.1K | 111K | Jan 1993 – Apr 2002 |
| Walton, J. B. "C" O-10-35067 | Bopco, L.P. only | Keystone (Holt) | Winkler | 5 | 57.6K | 107K | Aug 1996 – Aug 2015 |
| Keystone Cattle Co. O-10-26369 | Merit Energy Company only | Keystone (Holt) | Winkler | 6 | 56.7K | 505K | Jan 1993 – Dec 2015 |
| Moss-Walton "a" Unit O-10-34883 | Gruy Petroleum Management Co. only | Keystone (Holt) | Winkler | 1 | 56.5K | 196K | Mar 1996 – Apr 2002 |
| Glo 89 -a- Unit O-10-35082 | Gruy Petroleum Management Co. only | Keystone (Holt) | Winkler | 1 | 52.8K | 181K | Apr 1996 – Apr 2002 |
| Hanks, Nellie O-10-35658 | Gruy Petroleum Management Co. only | Keystone (Holt) | Winkler | 1 | 48.3K | 99.7K | Jan 1998 – Apr 2002 |
| Taylor "A"/ Ward Unit O-10-35153 | Gruy Petroleum Management Co. only | Keystone (Holt) | Winkler | 1 | 47.7K | 84.4K | Sep 1996 – Apr 2002 |
| Mrs. M. E. Crum O-10-27837 | Gruy Petroleum Management Co. only | Keystone (Holt) | Winkler | 8 | 47K | 149K | Jan 1993 – Apr 2002 |
| Taylor, Mack O-10-34895 | Gruy Petroleum Management Co. only | Keystone (Holt) | Winkler | 4 | 46.3K | 148K | Apr 1996 – Apr 2002 |
| Moss-Walton "B" Unit O-10-34923 | Gruy Petroleum Management Co. only | Keystone (Holt) | Winkler | 1 | 44K | 84.7K | Apr 1996 – Apr 2002 |
| Glo 89 "B" Unit O-10-35102 | Gruy Petroleum Management Co. only | Keystone (Holt) | Winkler | 1 | 36.9K | 132K | Oct 1996 – Apr 2002 |
| Crum, Mrs M.E. O-10-34845 | Prize Operating Company only | Keystone (Holt) | Winkler | 1 | 33.9K | 77.5K | Jan 1996 – Jun 2001 |
| Hanks, Taylor "A" O-10-35135 | Prize Operating Company only | Keystone (Holt) | Winkler | 1 | 33.6K | 68.9K | Nov 1996 – Oct 2001 |
| Moss, J.H. O-10-34218 | Hallwood Petroleum, Inc. only | Keystone (Holt) | Winkler | 4 | 30.1K | 36.9K | May 1994 – Feb 1996 |
| Taylor-Hanks Unit O-10-35081 | Prize Operating Company only | Keystone (Holt) | Winkler | 1 | 25.6K | 43.7K | Jun 1996 – Oct 2001 |
| Keystone Cattle Co. O-10-3384 | Mineral Technologies, Inc. only | Keystone (Holt) | — | 1 | 25.3K | 1.69K | Jan 1993 – Feb 2017 |
| Bradish-Moss Unit O-10-35225 | Prize Operating Company only | Keystone (Holt) | Winkler | 1 | 23.2K | 41K | Jan 1997 – Jun 2001 |
| Bradish O-10-35066 | Gruy Petroleum Management Co. only | Keystone (Holt) | Winkler | 1 | 19.6K | 43.5K | Sep 1996 – Apr 2002 |
| Moss, J. H. "B" O-10-34486 | Hallwood Petroleum, Inc. only | Keystone (Holt) | Winkler | 3 | 15.2K | 17.6K | Feb 1995 – Feb 1996 |
| Trinity "D" Unit O-10-35659 | Merit Energy Company only | Keystone (Holt) | Winkler | 1 | 12.8K | 3.84K | Dec 1997 – Jun 2016 |
| Trinity "a" Unit O-10-35190 | Gruy Petroleum Management Co. only | Keystone (Holt) | Winkler | 1 | 10.1K | 23.3K | Jan 1997 – Apr 2003 |
| Taylor-Smith Unit O-10-35731 | Prize Operating Company only | Keystone (Holt) | Winkler | 1 | 10K | 32.9K | Jan 1998 – Oct 2001 |
| Bradish/Crum Unit O-10-35204 | Gruy Petroleum Management Co. only | Keystone (Holt) | Winkler | 1 | 7.94K | 20.4K | Dec 1996 – Apr 2002 |
| Jake O-10-45909 | Mas Operating Co. only | Keystone (Holt) | Winkler | 1 | 6.57K | 2.92K | Sep 2014 – Mar 2017 |
| Moss, J.H. "A" O-10-34495 | Hallwood Petroleum, Inc. only | Keystone (Holt) | Winkler | 2 | 4.61K | 10.1K | May 1995 – Dec 1995 |
| Lovett-Whaley O-10-37042 | Devon Energy Production Co, L.P. only | Keystone (Holt) | Winkler | 1 | 3.6K | 149K | Mar 2002 – Aug 2007 |
| State-Walton O-10-35062 | Devon Energy Production Co, L.P. only | Keystone (Holt) | Winkler | 1 | 2.47K | 43.4K | Aug 1996 – Jan 2005 |
| Walton, J. B. "C" O-10-34821 | Bass Enterprises Production Co. only | Keystone (Holt) | Winkler | 1 | 1.43K | 2.27K | Jan 1996 – May 1996 |
| J. B. Walton "E" a/C 2 O-10-34622 | Parker & Parsley Development L.P only | Keystone (Holt) | Winkler | 1 | 1.31K | 4.99K | Aug 1995 – Sep 1996 |
| Kesler, R. D. O-10-34575 | Devon Energy Production Co, L.P. only | Keystone (Holt) | Winkler | 1 | 1.2K | 12.5K | Jun 1995 – Nov 2003 |
| Lavender #2 O-10-31433 | Endeavor Energy Resources L.P. only | Keystone (Holt) | Winkler | 1 | 497 | 8 | Jan 1993 – Mar 2013 |
| Perkins, J. J. "C" O-10-35142 | Merit Energy Company only | Keystone (Holt) | Winkler | 1 | 149 | 0 | Sep 1996 – Nov 2015 |
| Smith, Lucy O-10-35017 | Chevron Midcontinent, L.P. only | Keystone (Holt) | Winkler | 1 | 15 | 0 | Jun 1996 – Oct 2013 |
| Keystone Holt Unit G-10-190699 | Basin Oil & Gas Operating, LLC only | Keystone (Holt) | — | 1 | 0 | 267K | Sep 2002 – Jul 2026 |
| Keystone Holt Unit G-10-190211 | Basin Oil & Gas Operating, LLC only | Keystone (Holt) | Winkler | 1 | 0 | 1.57M | Aug 2002 – Sep 2023 |
| State-Walton 'E' G-10-183074 | Formentera Operations LLC only | Keystone (Holt) | Winkler | 1 | 0 | 424K | Apr 2001 – Jul 2026 |
| Keystone Holt Unit G-10-173986 | Basin Oil & Gas Operating, LLC only | Keystone (Holt) | Winkler | 1 | 0 | 1.87M | Jul 1999 – Aug 2023 |
| Bashara, M. J. O-10-35866 | Merit Energy Company only | Keystone (Holt) | Winkler | 1 | 0 | 0 | Sep 1997 – Nov 2015 |