| Garza, L. G-4-172011 | Mountain V Texas, LLC only | Haynes (Middle Wilcox Cons.) | Zapata | 1 | 5.6K | 1.76M | Dec 1998 – Apr 2026 |
| L. Garza Estate G-4-221360 | Hilcorp Energy Company only | Haynes (Middle Wilcox Cons.) | Zapata | 1 | 5.56K | 1.28M | May 2006 – Apr 2026 |
| Asche G-4-194490 | Hilcorp Energy Company only | Haynes (Middle Wilcox Cons.) | Zapata | 1 | 3.74K | 2.91M | Mar 2003 – Apr 2026 |
| KMF G-4-270851 | Hilcorp Energy Company only | Haynes (Middle Wilcox Cons.) | Zapata | 1 | 3.56K | 1.84M | May 2013 – Apr 2026 |
| Garza, L. et al Estate Of G-4-173547 | Hilcorp Energy Company only | Haynes (Middle Wilcox Cons.) | Zapata | 1 | 3.28K | 5.54M | May 1999 – Apr 2026 |
| Haynes G-4-209780 | Hilcorp Energy Company only | Haynes (Middle Wilcox Cons.) | Zapata | 1 | 2.32K | 908K | Jan 2005 – Apr 2026 |
| Haynes "B" G-4-144877 | Hilcorp Energy Company only | Haynes (Middle Wilcox Cons.) | Zapata | 1 | 2K | 6.22M | Mar 1993 – Aug 2011 |
| Haynes 'D' G-4-278498 | Hilcorp Energy Company only | Haynes (Middle Wilcox Cons.) | Zapata | 1 | 1.97K | 512K | Jul 2015 – Apr 2026 |
| Flores, L. G. G-4-194677 | Hilcorp Energy Company only | Haynes (Middle Wilcox Cons.) | Zapata | 1 | 1.77K | 1.59M | Mar 2003 – Apr 2026 |
| Asche G-4-165973 | Hilcorp Energy Company only | Haynes (Middle Wilcox Cons.) | Zapata | 1 | 1.63K | 7.63M | Dec 1997 – Apr 2026 |
| Jacoba G-4-217484 | Hilcorp Energy Company only | Haynes (Middle Wilcox Cons.) | Zapata | 1 | 1.48K | 827K | Nov 2005 – Apr 2026 |
| Bustamante G.u.,bernardo G-4-194486 | Killam Oil Co., Ltd. only | Haynes (Middle Wilcox Cons.) | Zapata | 1 | 1.45K | 952K | Feb 2003 – Oct 2023 |
| L. Garza G-4-170350 | Mountain V Texas, LLC only | Haynes (Middle Wilcox Cons.) | Zapata | 1 | 1.33K | 4.15M | Sep 1998 – Apr 2026 |
| Flores, L.G. G-4-135085 | Hilcorp Energy Company only | Haynes (Middle Wilcox Cons.) | Zapata | 1 | 1.32K | 1.33M | Jan 1993 – Apr 2026 |
| Bustamante G. U. G-4-197661 | Hilcorp Energy Company only | Haynes (Middle Wilcox Cons.) | Zapata | 1 | 1.32K | 2.82M | Aug 2003 – Apr 2026 |
| Bernardo Gas Unit G-4-178477 | Hilcorp Energy Company only | Haynes (Middle Wilcox Cons.) | Zapata | 1 | 1.18K | 4.79M | Jun 2000 – Apr 2026 |
| Araceli Gas Unit G-4-170557 | Hilcorp Energy Company only | Haynes (Middle Wilcox Cons.) | Zapata | 1 | 1.17K | 2.84M | Oct 1998 – Apr 2026 |
| Haynes G-4-202105 | Hilcorp Energy Company only | Haynes (Middle Wilcox Cons.) | Zapata | 1 | 1.16K | 3.14M | Dec 2003 – Apr 2026 |
| Flores, L. G. G-4-183308 | Hilcorp Energy Company only | Haynes (Middle Wilcox Cons.) | Zapata | 1 | 1.1K | 2.66M | May 2001 – Apr 2026 |
| Flores, L.G. G-4-149952 | Hilcorp Energy Company only | Haynes (Middle Wilcox Cons.) | Zapata | 1 | 1.1K | 4.34M | May 1994 – Mar 1997 |
| Whittier Gas Unit No. 1 G-4-226218 | Petrovybe Opco LLC only | Haynes (Middle Wilcox Cons.) | Zapata | 1 | 1.08K | 1.94M | Feb 2007 – Apr 2026 |
| Garza, L. Estate of et Al G-4-175025 | Hilcorp Energy Company only | Haynes (Middle Wilcox Cons.) | Zapata | 1 | 1.06K | 1.09M | Oct 1999 – Sep 2025 |
| Asche G-4-167605 | Hilcorp Energy Company only | Haynes (Middle Wilcox Cons.) | Zapata | 1 | 1.04K | 4.6M | Mar 1998 – Apr 2026 |
| Asche G-4-173165 | Hilcorp Energy Company only | Haynes (Middle Wilcox Cons.) | Zapata | 1 | 1.03K | 3.48M | Apr 1999 – Apr 2026 |
| Flores, L. G. G-4-187913 | Hilcorp Energy Company only | Haynes (Middle Wilcox Cons.) | Zapata | 1 | 1.02K | 1.39M | Jan 2002 – Jun 2023 |
| Haynes "B" G-4-146044 | Hilcorp Energy Company only | Haynes (Middle Wilcox Cons.) | Zapata | 1 | 968 | 1.66M | Jul 1993 – Oct 2007 |
| Asche G-4-203240 | Hilcorp Energy Company only | Haynes (Middle Wilcox Cons.) | Zapata | 1 | 962 | 1.36M | Jul 2004 – Apr 2026 |
| Gutierrez, E. E. G-4-170130 | Hilcorp Energy Company only | Haynes (Middle Wilcox Cons.) | Zapata | 1 | 917 | 7.9M | Aug 1998 – Apr 2026 |
| Munoz G-4-190813 | Hilcorp Energy Company only | Haynes (Middle Wilcox Cons.) | Zapata | 1 | 875 | 2.56M | Jul 2002 – Apr 2026 |
| Garza, L. G-4-169192 | Mountain V Texas, LLC only | Haynes (Middle Wilcox Cons.) | Zapata | 1 | 859 | 2.08M | Jul 1998 – Apr 2026 |
| Flores, L. G. G-4-204424 | Hilcorp Energy Company only | Haynes (Middle Wilcox Cons.) | Zapata | 1 | 826 | 840K | Sep 2004 – Apr 2026 |
| Gutierrez, Raquel F G-4-197063 | Three C Exploration, LLC only | Haynes (Middle Wilcox Cons.) | Zapata | 1 | 802 | 1.47M | Sep 2003 – May 2022 |
| Haynes G-4-209707 | Hilcorp Energy Company only | Haynes (Middle Wilcox Cons.) | Zapata | 1 | 796 | 1.09M | Feb 2005 – Feb 2019 |
| Porras Gas Unit G-4-171536 | Hilcorp Energy Company only | Haynes (Middle Wilcox Cons.) | Zapata | 1 | 735 | 2.23M | Oct 1998 – Apr 2026 |
| Flores, L. G. G-4-193269 | Hilcorp Energy Company only | Haynes (Middle Wilcox Cons.) | Zapata | 1 | 648 | 1.64M | Nov 2002 – Apr 2026 |
| Haynes Mineral Trust G-4-139158 | Hilcorp Energy Company only | Haynes (Middle Wilcox Cons.) | Zapata | 1 | 638 | 1.54M | Jan 1993 – Aug 2011 |
| Flores, L.G. G-4-151453 | Hilcorp Energy Company only | Haynes (Middle Wilcox Cons.) | Zapata | 1 | 574 | 3.21M | Sep 1994 – Apr 2026 |
| Asche G-4-174308 | Hilcorp Energy Company only | Haynes (Middle Wilcox Cons.) | Zapata | 1 | 551 | 5.85M | Aug 1999 – Apr 2026 |
| Flores, L. G. G-4-215109 | Hilcorp Energy Company only | Haynes (Middle Wilcox Cons.) | Zapata | 1 | 516 | 1.21M | Oct 2005 – Apr 2026 |
| Jacoba G-4-173877 | Hilcorp Energy Company only | Haynes (Middle Wilcox Cons.) | Zapata | 1 | 512 | 1.9M | Jul 1999 – Apr 2026 |
| Moffat, Elza Gutierrez G-4-198422 | GGP Exploration, Ltd. only | Haynes (Middle Wilcox Cons.) | Zapata | 1 | 500 | 2.9M | Dec 2003 – Jul 2020 |
| Lanier Estate G-4-253316 | Proline Energy Resources Inc only | Haynes (Middle Wilcox Cons.) | Zapata | 1 | 500 | 310K | Feb 2009 – Aug 2024 |
| Laurel, F.D. "A" G-4-127524 | Varas Energy Operating Company, only | Haynes (Middle Wilcox Cons.) | Zapata | 1 | 490 | 3.48M | Jan 1993 – Apr 2026 |
| Yzaguirre-Leo Gas Unit G-4-146889 | Hilcorp Energy Company only | Haynes (Middle Wilcox Cons.) | Zapata | 1 | 487 | 5.97M | Oct 1993 – Apr 2026 |
| Rodriguez Gas Unit G-4-146753 | Hilcorp Energy Company only | Haynes (Middle Wilcox Cons.) | Zapata | 1 | 453 | 7.42M | Sep 1993 – Apr 2026 |
| Flores G-4-247784 | Laredo Energy Operating, LLC only | Haynes (Middle Wilcox Cons.) | Zapata | 1 | 446 | 198K | Oct 2008 – Jun 2013 |
| Flores, L.G. G-4-188699 | Hilcorp Energy Company only | Haynes (Middle Wilcox Cons.) | Zapata | 1 | 444 | 3.99M | Apr 2002 – Apr 2026 |
| Irene G-4-201086 | Hilcorp Energy Company only | Haynes (Middle Wilcox Cons.) | Zapata | 1 | 410 | 1.88M | Mar 2004 – Apr 2026 |
| Whittier Gas Unit No. 2 G-4-233520 | Petrovybe Opco LLC only | Haynes (Middle Wilcox Cons.) | Zapata | 1 | 403 | 3.91M | Mar 2007 – Jan 2026 |
| Yzaguirre - Leo Gas Unit G-4-194298 | Hilcorp Energy Company only | Haynes (Middle Wilcox Cons.) | Zapata | 1 | 392 | 4.95M | Jan 2003 – Apr 2026 |