| Barrocito, B.M. G-4-246992 | Mountain V Texas, LLC only | Stirling (Wilcox Consolidated) | Zapata | 1 | 175K | 9.01M | Jan 2009 – Apr 2026 |
| Guerra, M. G-4-166580 | Hilcorp Energy Company only | Roleta (Wilcox Consolidated) | Zapata | 1 | 151K | 14M | Jan 1997 – Apr 2026 |
| Barrocito, B. M. G-4-249417 | Mountain V Texas, LLC only | Stirling (Wilcox Consolidated) | Zapata | 1 | 68.4K | 2.01M | Mar 2009 – Apr 2026 |
| Slator Ranch "A" G-4-173763 | Mountain V Texas, LLC only | Zwebb (10350) | Zapata | 1 | 56.7K | 4.17M | Jul 1999 – Apr 2026 |
| A. Martinez Unit G-4-148338 | Hilcorp Energy Company only | La Perla (Lobo Cons.) | Zapata | 1 | 52.5K | 6.48M | Feb 1994 – Apr 2026 |
| Barrocito, B. M. G-4-254022 | Mountain V Texas, LLC only | Stirling (Wilcox Consolidated) | Zapata | 1 | 45.1K | 3.15M | Dec 2009 – Apr 2026 |
| Gutierrez Heirs 37 G-4-164759 | Varas Energy Operating Company, only | Urebeno, South (Wilcox 7000) | Zapata | 1 | 43.8K | 9.21M | Sep 1997 – Nov 2025 |
| Barrocito, B.M. G-4-237452 | Mountain V Texas, LLC only | Stirling (Wilcox Consolidated) | Zapata | 1 | 41.9K | 2.23M | Apr 2008 – Apr 2026 |
| 3J Zapata Meza Gas Unit G-4-208803 | Hilcorp Energy Company only | Roleta (7483) | Zapata | 1 | 39.3K | 6.04M | Feb 2005 – Apr 2026 |
| Briones, J.E. "A" G-4-147343 | Columbus Energy, LLC only | La Perla (Lobo Cons.) | Zapata | 1 | 35.6K | 12.3M | Nov 1993 – Apr 2026 |
| Martinez, Antonio et Al G-4-150087 | Hilcorp Energy Company only | La Perla (Lobo Cons.) | Zapata | 1 | 35.3K | 3.6M | Jun 1994 – Apr 2026 |
| Barrocito, B. M. G-4-247788 | Mountain V Texas, LLC only | Stirling (Wilcox Consolidated) | Zapata | 1 | 35K | 2.83M | Feb 2009 – Apr 2026 |
| Vela Estate G-4-148956 | Hilcorp Energy Company only | Roleta (Wilcox Consolidated) | Zapata | 1 | 33.4K | 5.18M | Jan 1994 – Apr 2026 |
| Guerra-Raymond G-4-165873 | Hilcorp Energy Company only | Roleta (Wilcox Consolidated) | Zapata | 1 | 33.3K | 4.6M | Sep 1997 – Apr 2026 |
| Thomasma, Ray J. G-4-198842 | Hilcorp Energy Company only | Zwebb (10350) | Zapata | 1 | 32.7K | 4.08M | Nov 2003 – Apr 2026 |
| Marshall, S. G. G-4-247791 | Mountain V Texas, LLC only | Pok - a - Dot (8600) | Zapata | 1 | 31.7K | 2.95M | Feb 2009 – Apr 2026 |
| Barrocito, B. M. G-4-255207 | Mountain V Texas, LLC only | Stirling (Wilcox Consolidated) | Zapata | 1 | 31.5K | 1.43M | Mar 2010 – Apr 2026 |
| Thomasma, Ray J. G-4-197050 | Hilcorp Energy Company only | Zwebb (10350) | Zapata | 1 | 31K | 4.87M | Sep 2003 – Apr 2026 |
| Vela, Serapio E G-4-175950 | Hilcorp Energy Company only | Roleta (C-5) | Zapata | 1 | 30.9K | 5.94M | Oct 1999 – Apr 2026 |
| Martinez, E.C. G-4-148708 | Hilcorp Energy Company only | La Perla (Lobo Cons.) | Zapata | 1 | 29.6K | 3.94M | Mar 1994 – Apr 2026 |
| Marshall, S.G. G-4-123171 | Mountain V Texas, LLC only | Pok - a - Dot (8600) | Zapata | 1 | 29.2K | 2.89M | Jan 1993 – Apr 2026 |
| Gutierrez Heirs G-4-113810 | Varas Energy Operating Company, only | Urebeno, South (Wilcox 7000) | Zapata | 1 | 29.1K | 6.63M | Jan 1993 – Apr 2026 |
| Marshall, S. G. G-4-174672 | Mountain V Texas, LLC only | Pok - a - Dot (8600) | Zapata | 1 | 29K | 3.75M | Sep 1999 – Apr 2026 |
| Wright-Barrera GU G-4-242851 | Mountain V Texas, LLC only | Pok - a - Dot (8600) | Zapata | 1 | 28.2K | 1.48M | Aug 2008 – Apr 2026 |
| Diego Gutierrez, et al Gas Unit G-4-183938 | Hilcorp Energy Company only | Bashara-Hereford (7300) | Zapata | 1 | 28.2K | 3.07M | Jun 2001 – Apr 2026 |
| Galo G-4-225605 | Hilcorp Energy Company only | Roleta (Wilcox Consolidated) | Zapata | 1 | 28.1K | 6.48M | Dec 2006 – Apr 2026 |
| Vela G-4-166711 | Hilcorp Energy Company only | Roleta (Wilcox Consolidated) | Zapata | 1 | 27.6K | 12.2M | Sep 1997 – Apr 2026 |
| Barrocito, B. M. G-4-243921 | Mountain V Texas, LLC only | Stirling (Wilcox Consolidated) | Zapata | 1 | 26.4K | 2.43M | Nov 2008 – Apr 2026 |
| Red Crest Trust G-4-213498 | Hilcorp Energy Company only | Roleta (Wilcox Consolidated) | Zapata | 1 | 25.5K | 2.5M | Jul 2005 – Apr 2026 |
| Martinez, Mercurio et al Unit G-4-77563 | Hilcorp Energy Company only | Laredo (Lobo) | Zapata | 1 | 24.6K | 7.34M | Jan 1993 – Apr 2026 |
| Martinez, Antonio et Al G-4-131590 | Hilcorp Energy Company only | La Perla (Lobo Cons.) | Zapata | 1 | 24.5K | 9.72M | Jan 1993 – Apr 2026 |
| Barrocito, B. M. G-4-266798 | Mountain V Texas, LLC only | Stirling (Wilcox Consolidated) | Zapata | 1 | 24.1K | 1.23M | Jan 2012 – Apr 2026 |
| Ramirez, L. O. A G-4-161952 | Hilcorp Energy Company only | Bob West, North (L-1,L-2,L-3) | Zapata | 1 | 23.9K | 11.6M | Nov 1996 – Apr 2026 |
| Garcia, Salvador "E" G-4-112962 | Hilcorp Energy Company only | Roleta (Wilcox Consolidated) | Zapata | 1 | 23.1K | 5.18M | Jan 1993 – Apr 2026 |
| Guerra L G-4-251536 | Hilcorp Energy Company only | Roleta (Wilcox Consolidated) | Zapata | 1 | 23K | 2.89M | Jan 2008 – Apr 2026 |
| El Paton G-4-246922 | Mortimer Production Company only | T Patch (Reklaw Oso) | Zapata | 1 | 22.3K | 1.11M | Jun 2008 – Apr 2026 |
| Haynes, L. G-4-202302 | Merit Energy Company only | Los Mogotes (Wilcox Cons.) | Zapata | 1 | 21K | 2.39M | Jun 2004 – Apr 2026 |
| Martinez, A. Unit G-4-151881 | Hilcorp Energy Company only | Bashara-Hereford (7300) | Zapata | 1 | 20.7K | 2.26M | Aug 1994 – Apr 2026 |
| Slator Ranch "B" G-4-175528 | Mountain V Texas, LLC only | Zwebb (10350) | Zapata | 1 | 20.4K | 1.84M | Jan 2000 – Apr 2026 |
| BMT-Barrocito G-4-256225 | Mountain V Texas, LLC only | Stirling (Wilcox Consolidated) | Zapata | 1 | 20.3K | 1.3M | Apr 2010 – Apr 2026 |
| Slator Ranch G-4-214137 | Mountain V Texas, LLC only | Stirling (Wilcox Consolidated) | Zapata | 1 | 20.3K | 5.85M | Oct 2005 – Apr 2026 |
| Gutierrez et Al G-4-216354 | Merit Energy Company only | Roleta (Wilcox Consolidated) | Zapata | 1 | 20.3K | 2.11M | Dec 2005 – Apr 2026 |
| Serapio Vela E G-4-175506 | Hilcorp Energy Company only | Roleta (C-5) | Zapata | 1 | 20.2K | 7.7M | Oct 1999 – Apr 2026 |
| Whittier G-4-224786 | Hilcorp Energy Company only | Roleta (Wilcox Consolidated) | Zapata | 1 | 20.2K | 3.88M | Dec 2006 – Apr 2026 |
| Juan de Dios G-4-202730 | Hilcorp Energy Company only | Exsun (Lobo Cons.) | Zapata | 1 | 20K | 4.02M | Jun 2004 – Apr 2026 |
| BMT-Barrocito G-4-257070 | Mountain V Texas, LLC only | Stirling (Wilcox Consolidated) | Zapata | 1 | 19.6K | 1.68M | Aug 2010 – Apr 2026 |
| McGrath G-4-183853 | Mountain V Texas, LLC only | Zwebb (10350) | Zapata | 1 | 19.5K | 3.61M | Jun 2001 – Apr 2026 |
| Vela, A. G-4-122547 | Proline Energy Resources Inc only | Roleta (Wilcox Consolidated) | Zapata | 1 | 19.4K | 3.08M | Jan 1993 – May 2021 |
| Galo G-4-230371 | Hilcorp Energy Company only | Roleta (Wilcox Consolidated) | Zapata | 1 | 19K | 2.52M | Jul 2007 – Apr 2026 |
| Las Clavellinas Ranch 36 G-4-165084 | Three C Exploration, LLC only | Zapata, SE. (Wilcox) | Zapata | 1 | 18.9K | 4.91M | Oct 1997 – Jul 2023 |