| S & M Energy - Arco "C" O-3-22016 | Hereford, J. A. Industries, Inc. only | Le Verte Switch | Jasper | 1 | 65.2K | 121K | May 1993 – Aug 1997 |
| Hereford -T- G-4-150205 | Merit Energy Company only | Bashara-Hereford (7300) | Webb | 1 | 48.4K | 6M | Jun 1994 – Aug 2026 |
| BMT-C-Moreno Gas Unit 1 G-4-157788 | Hilcorp Energy Company only | Bashara-Hereford (7300) | Webb | 1 | 46K | 6.99M | Feb 1996 – Aug 2026 |
| C-Bruni Mineral Trust G-4-137342 | Chevron U. S. A. Inc. only | Bashara-Hereford (7300) | Webb | 1 | 45.6K | 5.44M | by Jan 1993 – Mar 2011 |
| C-Bruni Mineral Trust G-4-135182 | Hilcorp Energy Company only | Bashara-Hereford (7300) | Webb | 1 | 43.9K | 7.41M | by Jan 1993 – Aug 2026 |
| Martinez, D.S. G-4-162129 | Columbus Energy, LLC only | Bashara-Hereford (7300) | Webb | 1 | 42.7K | 3.93M | Jan 1997 – Aug 2026 |
| McKendrick, W.H. G-4-152807 | Columbus Energy, LLC only | Hereford (Lobo) | Webb | 1 | 40.5K | 4.72M | Oct 1994 – Oct 2004 |
| C-Bruni Mineral Trust G-4-152405 | Hilcorp Energy Company only | Bashara-Hereford (7300) | Webb | 1 | 38.3K | 5.63M | Oct 1994 – Aug 2026 |
| C-Bruni Mineral Trust G-4-158139 | Hilcorp Energy Company only | Bashara-Hereford (7300) | Webb | 1 | 38K | 4.68M | Mar 1996 – Aug 2026 |
| C- Bruni Mineral Trust G-4-141443 | Hilcorp Energy Company only | Bashara-Hereford (7300) | Webb | 1 | 38K | 6.3M | by Jan 1993 – Aug 2026 |
| C-Bruni Mineral Trust G-4-143478 | Hilcorp Energy Company only | Bashara-Hereford (7300) | Webb | 1 | 37.9K | 4.22M | by Jan 1993 – Aug 2026 |
| Hereford, L. M. G-4-191663 | Merit Energy Company only | Laredo (Lobo) | Webb | 1 | 37.4K | 3.04M | Sep 2002 – Aug 2026 |
| C-Bruni Mineral Trust G-4-154452 | Hilcorp Energy Company only | Bashara-Hereford (7300) | Webb | 1 | 34.9K | 4.29M | May 1995 – Jun 2013 |
| Arco Fee Unit A-908 G-6-149072 | Hereford, J. A. Industries, Inc. only | Brookeland (Austin Chalk, 8800) | Jasper | 1 | 33.3K | 1.11M | Nov 1993 – May 2015 |
| Hereford -T- G-4-168181 | Merit Energy Company only | Bashara-Hereford (7300) | Webb | 1 | 31.6K | 6.28M | Apr 1998 – Aug 2026 |
| Prevost G-4-158034 | Columbus Energy, LLC only | Bashara-Hereford (7300) | Webb | 1 | 31.6K | 4.13M | Feb 1996 – Aug 2026 |
| C-Bruni Mineral Trust G-4-158097 | Hilcorp Energy Company only | Bashara-Hereford (7300) | Webb | 1 | 30.1K | 3.97M | Mar 1996 – Aug 2026 |
| Rancho Blanco G-4-155279 | Columbus Energy, LLC only | Bashara-Hereford (7300) | Webb | 1 | 28.6K | 4.28M | Jul 1995 – Aug 2026 |
| Diego Gutierrez, et al Gas Unit G-4-183938 | Hilcorp Energy Company only | Bashara-Hereford (7300) | Zapata | 1 | 28.2K | 3.08M | Jun 2001 – Aug 2026 |
| Moreno, Isidro et Al G-4-137356 | Hilcorp Energy Company only | Bashara-Hereford (7300) | Webb | 1 | 26.8K | 5.8M | by Jan 1993 – Aug 2026 |
| Hereford -T- G-4-151017 | North Central Oil Corp. only | Hereford (Lobo) | Webb | 1 | 26K | 2.79M | Jul 1994 – Jul 2005 |
| Alexander, Charles G-4-165681 | Columbus Energy, LLC only | Bashara-Hereford (7300) | Webb | 1 | 25.7K | 7.65M | Nov 1997 – Aug 2026 |
| Alexander, Charles G-4-167535 | Columbus Energy, LLC only | Bashara-Hereford (7300) | Webb | 1 | 25.5K | 5.15M | Mar 1998 – Aug 2026 |
| Block, Anna G-4-162572 | Columbus Energy, LLC only | Bashara-Hereford (7300) | Webb | 1 | 25.1K | 3.62M | Dec 1996 – Sep 2003 |
| Martinez, D.S. G-4-168891 | Columbus Energy, LLC only | Bashara-Hereford (7300) | Webb | 1 | 24.2K | 2.87M | Feb 1998 – Aug 2026 |
| Alexander, Charles G-4-169465 | Columbus Energy, LLC only | Bashara-Hereford (7300) | Webb | 1 | 23.9K | 3.3M | May 1998 – Sep 2016 |
| Bruni Mineral Trust "B" G-4-248708 | Hilcorp Energy Company only | Bashara-Hereford (7300) | Webb | 1 | 23.8K | 3.4M | Mar 2009 – Aug 2026 |
| Prevost G-4-163524 | Columbus Energy, LLC only | Bashara-Hereford (7300) | Webb | 1 | 22.9K | 1.5M | Apr 1997 – Aug 2026 |
| Ramirez, C.H. Minerals, Ltd B G-4-232488 | Lucky Lad Energy, LLC only | Hereford (Lobo) | Webb | 1 | 21.4K | 7.07M | Oct 2007 – Jun 2026 |
| 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 |
| McKendrick, W.H. G-4-151205 | Columbus Energy, LLC only | Hereford (Lobo) | Webb | 1 | 19.7K | 2.58M | Sep 1994 – Jul 2006 |
| 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 |
| McKendrick, W.H. G-4-153479 | Columbus Energy, LLC only | Hereford (Lobo) | Webb | 1 | 18K | 2.31M | Feb 1995 – Mar 2003 |
| 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 |
| Holt, W.N. O-6-10654 | Hereford, J. A. Industries, Inc. only | Angie,(pettet) | Shelby | 1 | 15.5K | 630K | by Jan 1993 – Sep 2010 |
| Martinez, D. G-4-138643 | Columbus Energy, LLC only | Bashara-Hereford (7300) | Webb | 1 | 15.3K | 7.51M | by Jan 1993 – Sep 2017 |
| Ramirez, J.E. G-4-203854 | Columbus Energy, LLC only | Hereford (Lobo) | Webb | 1 | 15.2K | 2.68M | Aug 2004 – Aug 2026 |
| Alexander, Charles G-4-166543 | Columbus Energy, LLC only | Bashara-Hereford (7300) | Webb | 1 | 15K | 1.37M | Dec 1997 – Aug 2007 |
| Garrison, Blount O-6-10047 | Hereford, J. A. Industries, Inc. only | Nacogdoches | Nacogdoches | 26 | 14.6K | 116 | by Jan 1993 – May 2019 |
| 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 |