| Halley, S.M. -B- O-10-37515 | Meco IV, LLC only | Emperor (Ellenburger) | Winkler | 1 | 28.6K | 1.67M | Dec 2004 – Mar 2016 |
| Sun-Halley O-10-7721 | Fueled Resources Inc only | Weiner (Colby Sand) | Winkler | 4 | 28.2K | 52K | by Jan 1993 – Sep 2021 |
| Stanolind-B,hill,m.f.-Mitchell G G-10-204142 | Hilcorp Energy Company only | Halley (McKee) | Winkler | 1 | 26.1K | 1.83M | Jun 2004 – Jun 2025 |
| Sealy Smith -B- O-10-25421 | Southern Operating, LLC only | Halley (Clear Fork) | Winkler | 2 | 25.8K | 260K | by Jan 1993 – Nov 2016 |
| Hill, M. J., Mrs. O-10-16892 | Hilcorp Energy Company only | Halley (Clear Fork) | Winkler | 2 | 25.6K | 243K | Jan 2007 – Jul 2026 |
| Halley, S. G-10-272621 | Basin Oil & Gas Operating, LLC only | Emperor (Miss.) | Winkler | 1 | 24.6K | 2.68M | Aug 2013 – Nov 2025 |
| Hendrick O-10-28603 | A&m Oil & Gas LLC only | Halley | Winkler | 1 | 24.2K | 26 | by Jan 1993 – Aug 2026 |
| Tex-Halley O-10-7722 | Fueled Resources Inc only | Weiner (Colby Sand) | Winkler | 7 | 23K | 37.9K | by Jan 1993 – Sep 2021 |
| Hill, M. J., Mrs. O-10-11868 | Bass Enterprises Production Co. only | Halley (Glorieta) | Winkler | 1 | 22.6K | 72.2K | by Jan 1993 – Sep 1999 |
| Hill Estate O-10-28968 | Bopco, L.P. only | Halley, South (Queen Sand) | Winkler | 1 | 22K | 66.4K | by Jan 1993 – Mar 2009 |
| Pan AM -B- Hill Mitchell O-10-30140 | XTO Energy Inc. only | Halley (San Andres) | Winkler | 1 | 22K | 27.5K | by Jan 1993 – Sep 2015 |
| Hill, Mrs. M. J. a/C #6 O-10-28548 | Hilcorp Energy Company only | Halley (Clear Fork) | Winkler | 2 | 21.3K | 33.9K | by Jan 1993 – Aug 2026 |
| Morton O-10-21630 | T&D Oil only | Halley | Winkler | 5 | 20.4K | 86 | Feb 1993 – Aug 2026 |
| Morton, Tobe -B- O-10-21626 | Saxet Oil Corporation only | Halley | Winkler | 9 | 20.4K | 141 | by Jan 1993 – Jul 2013 |
| Mitchell "A" O-10-34832 | Gruy Petroleum Management Co. only | Halley (Clear Fork) | Winkler | 1 | 19K | 43.2K | Jan 1996 – Jul 2001 |
| Mitchell, G. P. -B- O-10-11638 | Basin Oil & Gas Operating, LLC only | Halley (Montoya) | Winkler | 1 | 18.9K | 68.9K | May 2003 – Dec 2016 |
| Mitchell -25- O-10-26761 | U S Energy Corp. of Amer. Inc. only | Halley, South (Atoka) | Winkler | 1 | 18.8K | 52.6K | by Jan 1993 – Jun 2020 |
| Smith, Sealy, -B- O-10-15174 | Southern Operating, LLC only | Halley, South (Queen Sand) | Winkler | 5 | 17.6K | 90.1K | by Jan 1993 – Aug 2026 |
| Halley -B- O-10-2432 | Roy Jackson Energy Operating, LL only | Halley | Winkler | 19 | 17.4K | 29 | by Jan 1993 – Oct 2025 |
| Hill, M. J., Mrs. O-10-10809 | King Oil & Resources Co only | Halley (Glorieta) | Winkler | 1 | 16.9K | 41.5K | by Jan 1993 – May 2024 |
| Halley, S. M. O-10-21624 | Penwell South Operating LLC only | Halley | Winkler | 3 | 16.3K | 141 | by Jan 1993 – Feb 2026 |
| Hill, M. J. -19- O-10-33393 | King Oil & Resources Co only | Halley, South (Queen Sand) | Winkler | 1 | 15.5K | 36.2K | by Jan 1993 – Mar 2025 |
| Morton O-10-28121 | A&m Oil & Gas LLC only | Halley | Winkler | 1 | 14.9K | 16.5K | by Jan 1993 – Aug 2026 |
| Halley -B- O-10-2431 | Eagle Capital Partners, LLC only | Halley | Winkler | 1 | 14.8K | 54 | by Jan 1993 – Aug 2022 |
| Halley, S. M. G-10-180876 | Permex Petroleum Corporation only | Emperor (Simpson) | Winkler | 1 | 14.8K | 2.3M | Oct 2000 – Sep 2023 |
| MJ Hill Estate O-10-46240 | XTO Energy Inc. only | Halley (San Andres) | Winkler | 1 | 13.7K | 221K | Jun 2014 – Dec 2018 |
| Halley O-10-7720 | Fueled Resources Inc only | Weiner (Colby Sand) | Winkler | 6 | 13.3K | 34.5K | by Jan 1993 – Nov 2016 |
| Mitchell -21- O-10-27743 | U S Energy Corp. of Amer. Inc. only | Halley (Clear Fork) | Winkler | 1 | 13K | 32.7K | by Jan 1993 – Jun 2020 |
| Halley, S. M. O-10-37238 | Juno Operating Company III, LLC only | Kermit (Yates) | Winkler | 1 | 12.6K | 44.6K | Jan 2004 – Oct 2020 |
| Halley, S. M. G-10-160988 | Team Operating, L.L.C. only | Kermit (Yates) | Winkler | 1 | 11.5K | 164K | Oct 1996 – Mar 2020 |
| Estill Halley Unit O-10-21560 | Penwell South Operating LLC only | Halley | Winkler | 2 | 10.9K | 26.9K | by Jan 1993 – May 2007 |
| Pan AM B Hill Mitchell TR 2 G-10-202872 | XTO Energy Inc. only | Halley, West (McKee) | Winkler | 1 | 10.8K | 918K | Feb 2004 – Mar 2011 |
| Halley, S. M. G-10-183097 | Permex Petroleum Corporation only | Emperor (Simpson) | Winkler | 1 | 10.4K | 945K | Dec 2000 – Nov 2025 |
| Mitchell, G. P., -C- O-10-15959 | Endeavor Energy Resources L.P. only | Halley (Glorieta) | Winkler | 2 | 9.93K | 17.5K | by Jan 1993 – Apr 2011 |
| Sealy & Smith O-10-34715 | Anadarko Petroleum Corporation only | Halley (Glorieta) | Winkler | 1 | 9.08K | 32.1K | Oct 1994 – Jun 2001 |
| Tobe Morton -A- O-10-21631 | T&D Oil only | Halley | Winkler | 2 | 8.94K | 147 | by Jan 1993 – Aug 2026 |
| Hill, M. J. Acct 3 G-10-199675 | Hilcorp Energy Company only | Halley (McKee) | Winkler | 1 | 8.28K | 1.37M | Sep 2003 – Aug 2020 |
| Halley, S. G-10-172725 | Basin Oil & Gas Operating, LLC only | Emperor (Simpson) | Winkler | 1 | 8.1K | 2.13M | Mar 1999 – Nov 2025 |
| Halley, S.M. "B" O-10-35897 | Chesapeake Operating, Inc. only | Emperor (Wolfcamp) | Winkler | 1 | 8.01K | 117K | Aug 1997 – Jul 2004 |
| Halley, S. M. G-10-186673 | Permex Petroleum Corporation only | Emperor (Simpson) | Winkler | 1 | 7.99K | 2.1M | Feb 2001 – Nov 2025 |
| Tobe Morton -A- O-10-21625 | Saxet Oil Corporation only | Halley | Winkler | 16 | 7.72K | 135 | by Jan 1993 – Jul 2013 |
| Hill, Mrs. M. J. G-10-205188 | Hilcorp Energy Company only | Halley (McKee) | Winkler | 1 | 6.83K | 1.18M | Aug 2004 – Jul 2024 |
| Mitchell -20- O-10-27259 | U S Energy Corp. of Amer. Inc. only | Halley, South (Penn.) | Winkler | 1 | 6.37K | 131K | by Jan 1993 – Aug 2026 |
| Halley, S. G-10-166715 | Permex Petroleum Corporation only | Emperor (Simpson) | Winkler | 1 | 6.26K | 1.97M | Sep 1997 – Oct 2023 |
| Hill 23 Unit G-10-77697 | Bass Enterprises Production Co. only | Halley (Devonian) | Winkler | 1 | 6.13K | 2.47M | by Jan 1993 – Sep 2002 |
| Halley, S. M. G-10-19806 | Chevron U. S. A. Inc. only | Emperor (Simpson) | Winkler | 1 | 5.76K | 933K | by Jan 1993 – Jan 2006 |
| Halley -C- O-10-21562 | Penwell South Operating LLC only | Halley | Winkler | 4 | 4.99K | 8.17K | by Jan 1993 – Oct 2005 |
| Iverson-Cowden O-10-21561 | Penwell South Operating LLC only | Halley | Winkler | 4 | 4.89K | 88.1K | by Jan 1993 – Mar 2009 |
| Halley, S. M. "B" O-10-37697 | Meco IV, LLC only | Emperor (Simpson) | Winkler | 1 | 3.89K | 169K | May 2005 – Jan 2014 |
| Hill, M. J. Acct. 1 O-10-36223 | XTO Energy Inc. only | Halley (Penn. 8000) | Winkler | 1 | 3.46K | 110K | Jan 2000 – Apr 2016 |