| Alexander, Charles G-4-165680 | Columbus Energy, LLC only | Bashara-Hereford (7300) | Webb | 1 | 20.8K | 4.36M | Nov 1997 – Aug 2026 |
| Martinez, A. Unit G-4-151881 | Hilcorp Energy Company only | Bashara-Hereford (7300) | Zapata | 1 | 20.7K | 2.26M | Aug 1994 – Aug 2026 |
| Moreno, Isidro et Al G-4-160257 | Hilcorp Energy Company only | Bashara-Hereford (7300) | Webb | 1 | 19.1K | 2.1M | Sep 1996 – Aug 2026 |
| S. D. Martinez GU G-4-171660 | Columbus Energy, LLC only | Bashara-Hereford (7300) | Webb | 1 | 18.3K | 4.06M | Nov 1998 – Aug 2026 |
| C-Bruni Mineral Trust G-4-151285 | Hilcorp Energy Company only | Bashara-Hereford (7300) | Webb | 1 | 18.2K | 1.76M | Sep 1994 – Aug 2026 |
| Bashara-Prothro O-10-28702 | Merit Energy Company only | Keystone (Clear Fork) | Winkler | 2 | 18.2K | 36.5K | by Jan 1993 – Aug 1997 |
| Hereford, L. M. -A- G-4-233205 | Merit Energy Company only | Bashara-Hereford (7300) | Webb | 1 | 17K | 2.32M | Oct 2007 – Jan 2025 |
| Alexander, Charles G-4-165974 | Columbus Energy, LLC only | Bashara-Hereford (7300) | Webb | 1 | 16.3K | 6.32M | Dec 1997 – Aug 2026 |
| Hereford -T- G-4-169352 | Merit Energy Company only | Bashara-Hereford (7300) | Webb | 1 | 15.7K | 3.22M | May 1998 – Aug 2026 |
| Martinez, D. G-4-138643 | Columbus Energy, LLC only | Bashara-Hereford (7300) | Webb | 1 | 15.3K | 7.51M | by Jan 1993 – Sep 2017 |
| Alexander, Charles G-4-166543 | Columbus Energy, LLC only | Bashara-Hereford (7300) | Webb | 1 | 15K | 1.37M | Dec 1997 – Aug 2007 |
| Sun-Bashara O-3-3613 | Endeavor Energy Resources L.P. only | Saratoga | Hardin | 3 | 14.5K | 6.81K | by Jan 1993 – Dec 2012 |
| Martinez-Barrera Gas Init G-4-139901 | Columbus Energy, LLC only | Bashara-Hereford (7300) | Webb | 1 | 14.2K | 7.43M | by Jan 1993 – Aug 2026 |
| Moreno, Isidro et Al G-4-153608 | Hilcorp Energy Company only | Bashara-Hereford (7300) | Webb | 1 | 14.1K | 2.52M | Feb 1995 – Aug 2026 |
| Clark, N. H. G-4-155863 | Columbus Energy, LLC only | Bashara-Hereford (7300) | Webb | 1 | 14.1K | 2.32M | Sep 1995 – Aug 2026 |
| Block, Anna G-4-130731 | Columbus Energy, LLC only | Bashara-Hereford (7300) | Webb | 1 | 12.4K | 2.94M | by Jan 1993 – Aug 2026 |
| Alexander, Charles G-4-166000 | Columbus Energy, LLC only | Bashara-Hereford (7300) | Webb | 1 | 11.5K | 59.3K | Dec 1997 – Oct 2012 |
| Isidro Moreno et Al G-4-146717 | Hilcorp Energy Company only | Bashara-Hereford (7300) | Webb | 1 | 11.4K | 6.08M | Sep 1993 – Aug 2026 |
| Bash O-10-3366 | Bepco, L.P. only | Keystone (Ellenburger) | Winkler | 3 | 11.3K | 493K | by Jan 1993 – Apr 1995 |
| Alexander, Charles G-4-165577 | Columbus Energy, LLC only | Bashara-Hereford (7300) | Webb | 1 | 11.2K | 3.23M | Nov 1997 – Aug 2026 |
| Martinez, D. G-4-139918 | Columbus Energy, LLC only | Bashara-Hereford (7300) | Webb | 1 | 10.9K | 2.37M | by Jan 1993 – Jun 2017 |
| Bash O-10-16091 | Hilcorp Energy Company only | Keystone (Colby) | Winkler | 10 | 10.7K | 218K | by Jan 1993 – Jul 2019 |
| C-Bruni Mineral Trust G-4-146275 | Hilcorp Energy Company only | Bashara-Hereford (7300) | Webb | 1 | 10.6K | 1.68M | Aug 1993 – Aug 2026 |
| Hereford, L.M. G-4-130730 | Merit Energy Company only | Bashara-Hereford (7300) | Webb | 1 | 10.6K | 2.75M | by Jan 1993 – May 2020 |
| Martinez, D. G-4-139656 | Columbus Energy, LLC only | Bashara-Hereford (7300) | Webb | 1 | 10.4K | 4.24M | by Jan 1993 – Aug 2026 |
| Vela, J. M. G-4-223210 | Hilcorp Energy Company only | Bashara-Hereford (7300) | Zapata | 1 | 10.4K | 6.44M | Aug 2006 – Aug 2026 |
| Moreno, Isidro et Al G-4-141843 | Hilcorp Energy Company only | Bashara-Hereford (7300) | Webb | 1 | 10.2K | 3.24M | by Jan 1993 – Jun 2021 |
| Wm. Hubberd A2 G-4-167805 | Columbus Energy, LLC only | Bashara-Hereford (7300) | Webb | 1 | 10.2K | 1.26M | Apr 1998 – Aug 2026 |
| Martinez, A. Unit G-4-152809 | Hilcorp Energy Company only | Bashara-Hereford (7300) | Zapata | 1 | 10.1K | 310K | Dec 1994 – Aug 2026 |
| Bashe O-13-29862 | Rocanville Corporation only | Clingingsmith, E. (Strawn, Up.) | Montague | 1 | 9.94K | 0 | Jan 2001 – Sep 2010 |
| Hereford, L.M. G-4-125962 | Merit Energy Company only | Bashara-Hereford (6900) | Webb | 1 | 9.69K | 2.46M | by Jan 1993 – Aug 2026 |
| Eudoxio Martinez Unit 1 G-4-159337 | Hilcorp Energy Company only | Bashara-Hereford (7300) | Zapata | 1 | 9.5K | 2.72M | Jun 1996 – Aug 2026 |
| Clark, N. H. G-4-161243 | Columbus Energy, LLC only | Bashara-Hereford (7300) | Webb | 1 | 9.06K | 1.5M | Jul 1996 – Nov 2022 |
| B.M.T. G-4-178993 | Columbus Energy, LLC only | Bashara-Hereford (7300) | Webb | 1 | 8.98K | 1.76M | Sep 2000 – Aug 2026 |
| McKendrick, W.H. G-4-130007 | Columbus Energy, LLC only | Bashara-Hereford (7300) | Webb | 1 | 8.85K | 4.1M | by Jan 1993 – Aug 2026 |
| Bashara, M. J. G-10-153194 | Hilcorp Energy Company only | Keystone (Ellenburger) | Winkler | 1 | 8.81K | 1.71M | Feb 1995 – Jul 2018 |
| Antonio Martinez et al 'a' Unit G-4-150832 | Hilcorp Energy Company only | Bashara-Hereford (7300) | Zapata | 1 | 8.62K | 1.34M | Aug 1994 – May 2016 |
| B.M.T. G-4-165976 | Columbus Energy, LLC only | Bashara-Hereford (7300) | Webb | 1 | 8.54K | 2.93M | Dec 1997 – Aug 2026 |
| Hereford -T- G-4-130728 | Merit Energy Company only | Bashara-Hereford (7300) | Webb | 1 | 8K | 2.14M | by Jan 1993 – Mar 2012 |
| Bruni Mineral Trust "C" G-4-192413 | Lakeshore Operating, LLC only | Bashara-Hereford (7300) | Webb | 1 | 7.69K | 3.01M | Dec 2002 – Aug 2026 |
| Hereford, L. M. -A- G-4-137904 | Merit Energy Company only | Bashara-Hereford (7300) | Webb | 1 | 7.5K | 2.31M | by Jan 1993 – Mar 2021 |
| Vela, J.M. G-4-154947 | Hilcorp Energy Company only | Bashara-Hereford (7300) | Zapata | 1 | 7.47K | 5.25M | Jul 1995 – Aug 2026 |
| Alexander, Charles G-4-194072 | Columbus Energy, LLC only | Bashara-Hereford (7300) | Webb | 1 | 7.41K | 4.05M | Dec 2002 – Aug 2026 |
| C-Bruni Mineral Trust G-4-145803 | Hilcorp Energy Company only | Bashara-Hereford (7300) | Webb | 1 | 7.36K | 875K | Jun 1993 – Aug 2020 |
| Bashara, M.J. Unit G-10-152785 | Formentera Operations LLC only | Keystone (Consolidated) | Winkler | 1 | 7.32K | 2.32M | Aug 1994 – Jan 2023 |
| Hereford, L.M. G-4-125035 | Merit Energy Company only | Bashara-Hereford (7300) | Webb | 1 | 7.22K | 2.43M | by Jan 1993 – May 2026 |
| Bashara, M. J. -E- O-10-52086 | Hilcorp Energy Company only | Keystone (Dev-McKee Cons) | Winkler | 1 | 7.21K | 11.5K | Mar 2019 – Dec 2025 |
| Owens, M.M. O-8-17754 | Humphrey-Bashford Oil, Inc. only | Ben-W. (Flippen Lime) | Jones | 2 | 7.01K | 48 | by Jan 1993 – Jan 2003 |
| Hereford -T- G-4-128646 | Merit Energy Company only | Bashara-Hereford (7300) | Webb | 1 | 7K | 3.56M | by Jan 1993 – Aug 2026 |
| Vela, J.M. G-4-201079 | Hilcorp Energy Company only | Bashara-Hereford (7300) | Webb | 1 | 6.99K | 4.72M | Mar 2004 – Aug 2026 |