| Guerra, A. E. G-4-139868 | Chevron U. S. A. Inc. only | McAllen Ranch (Vicksburg y, E.) | Hidalgo | 1 | 31.4K | 1.01M | Jan 1993 – Mar 1996 |
| McAllen, A. A. "Slot" G-4-164562 | Merit Energy Company only | McAllen Ranch (Vicksburg S, E.) | Hidalgo | 1 | 31.4K | 576K | Apr 1997 – Dec 2002 |
| McAllen, A. A. "A" G-4-150919 | Shell Western E&P Inc. only | McAllen Ranch (Vicksburg K Cons) | Hidalgo | 1 | 31.4K | 1.54M | Aug 1994 – Nov 1995 |
| McAllen, A. A. "B" G-4-197674 | Merit Energy Company only | McAllen Ranch (Vksbg L-V, N Cons | Hidalgo | 1 | 31.4K | 2.69M | Oct 2003 – Apr 2026 |
| Guerra, A. E. G-4-290072 | Hilcorp Energy Company only | McAllen Ranch (Vicksburg y, E.) | Hidalgo | 1 | 31.2K | 1.79M | Nov 2016 – Apr 2026 |
| McAllen, A. A. "B" G-4-270808 | Merit Energy Company only | McAllen Ranch (Vksbg L-V, N Cons | Hidalgo | 1 | 31.1K | 1.72M | Sep 2013 – Apr 2026 |
| McAllen Fieldwide Unit G-4-152262 | Merit Energy Company only | McAllen-Pharr (Consolidated) | Hidalgo | 1 | 30.8K | 6.92M | Oct 1994 – Apr 2026 |
| McAllen, A.A. G-4-81976 | Shell Western E&P only | McAllen Ranch (Vksbg P-V,s Cons) | Hidalgo | 1 | 30.8K | 2.08M | Jan 1993 – Sep 2003 |
| McAllen, A.A. -B- G-4-135567 | Merit Energy Company only | McAllen Ranch (Vksbg L-V, N Cons | Hidalgo | 1 | 30.7K | 2.54M | Jan 1993 – Apr 2026 |
| Callison B Unit O-13-32012 | EOG Resources, Inc. only | Newark, East (Barnett Shale) | Montague | 1 | 30.6K | 975K | Jul 2012 – Apr 2026 |
| Guerra, A. E. G-4-157337 | Hilcorp Energy Company only | McAllen Ranch (Vicksburg y, E.) | Hidalgo | 1 | 29.9K | 2.26M | Feb 1996 – Feb 2007 |
| Guerra, A. E. G-4-152560 | Chevron U. S. A. Inc. only | McAllen Ranch (Vksbg P-V,s Cons) | Hidalgo | 1 | 29.9K | 3.97M | Jan 1995 – Nov 1996 |
| Beaurline, A. W. G-4-168906 | OXY USA Inc. only | McAllen Ranch (Vicksburg y, E.) | Hidalgo | 1 | 29.9K | 1.17M | Feb 1998 – Jul 2000 |
| McAllen, A. A. G-4-184913 | Hilcorp Energy Company only | McAllen Ranch (Vksbg P-V,s Cons) | Hidalgo | 1 | 29.9K | 1.57M | Sep 2001 – Apr 2026 |
| Guerra, A. E. G-4-167590 | Chevron U. S. A. Inc. only | McAllen Ranch (Guerra) | Hidalgo | 1 | 29.9K | 2.44M | Feb 1998 – Apr 1999 |
| McAllen, A. A. G-4-143655 | Hilcorp Energy Company only | McAllen Ranch (Vksbg P-V,s Cons) | Hidalgo | 1 | 29.8K | 856K | Jan 1993 – Aug 2002 |
| Woods Christian G-4-178826 | Merit Energy Company only | McAllen Ranch (Vksbg P-V,s Cons) | Hidalgo | 1 | 29.8K | 669K | Aug 2000 – Apr 2026 |
| Pharr Fieldwide Unit G-4-160657 | OXY USA Inc. only | McAllen (Hansen) | Hidalgo | 1 | 29.7K | 2.5M | Apr 1996 – Jun 2012 |
| Woods Christian G-4-33487 | Merit Energy Company only | McAllen Ranch (Vksbg P-V,s Cons) | Hidalgo | 1 | 29.6K | 1.14M | Jan 1993 – Apr 2026 |
| McAllen, A. A. 'B' G-4-137364 | Merit Energy Company only | McAllen Ranch (Vksbg L-V, N Cons | Hidalgo | 1 | 29.5K | 1.97M | Jan 1993 – Apr 2026 |
| Callas, J.P. O-3-14445 | Kouatli, Aiman M. only | Caldwell (Austin Chalk) | Burleson | 1 | 29.4K | 90.8K | Jan 1993 – Mar 2026 |
| McAllen, A. A. G-4-272600 | Merit Energy Company only | McAllen Ranch (Vksbg L-V, N Cons | Hidalgo | 1 | 29.4K | 1.9M | Mar 2014 – Apr 2026 |
| McAllen, A. A. G-4-210940 | Merit Energy Company only | McAllen Ranch (Vksbg P-V,s Cons) | Hidalgo | 1 | 29.4K | 1.02M | Jul 2005 – Feb 2023 |
| Woods Christian G-4-199161 | Merit Energy Company only | McAllen Ranch (Vksbg P-V,s Cons) | Hidalgo | 1 | 29.4K | 1.71M | Dec 2003 – Mar 2016 |
| Coates G-4-139763 | Sanchez Oil & Gas Corporation only | McAllen Ranch (Vicksburg N) | Hidalgo | 1 | 29.4K | 2.17M | Jan 1993 – Nov 1997 |
| Beaurline, A.W. G-4-163873 | Shell Western E&P only | McAllen Ranch (Vicksburg y, E.) | Hidalgo | 1 | 29.3K | 1.61M | Jul 1997 – May 2000 |
| McAllen, A.A. G-4-88271 | Merit Energy Company only | McAllen Ranch (Vksbg P-V,s Cons) | Hidalgo | 1 | 29.3K | 1.59M | Jan 1993 – Apr 2026 |
| Arc-Call & Jones O-3-9782 | HD Operating Co, LLC only | Newton, N. (Wilcox 9750) | Newton | 2 | 29.2K | 7.49K | Jan 1993 – May 2002 |
| Callaway O-11-64414 | Three Span Oil & Gas, Inc. only | Sharon Ridge (1700) | Scurry | 5 | 29K | 747 | Jan 1993 – Apr 2026 |
| Guerra, A. E. G-4-165420 | Chevron U. S. A. Inc. only | McAllen Ranch (Vicksburg y, E.) | Hidalgo | 1 | 29K | 1.31M | Nov 1997 – May 1998 |
| Woods Christian G-4-84867 | Merit Energy Company only | McAllen Ranch (Vksbg P-V,s Cons) | Hidalgo | 1 | 28.9K | 2.03M | Jan 1993 – Sep 2015 |
| McAllen, A. A. "B" G-4-269598 | Merit Energy Company only | McAllen Ranch (Vksbg L-V, N Cons | Hidalgo | 1 | 28.9K | 1.72M | Mar 2013 – Apr 2026 |
| McAllen Fieldwide Unit G-4-170949 | Merit Energy Company only | McAllen-Pharr (Consolidated) | Hidalgo | 1 | 28.8K | 3.27M | May 1998 – Apr 2009 |
| Guerra, E. E. "A" G-4-254434 | Dewbre Petroleum Corporation only | McAllen Ranch (Guerra) | Hidalgo | 1 | 28.8K | 2.76M | Jan 2010 – Apr 2026 |
| McAllen, A. A. G-4-60121 | Shell Western E&P only | McAllen Ranch (Vicksburg S, SE.) | Hidalgo | 1 | 28.6K | 1.53M | Jan 1993 – Mar 1998 |
| Keirn, Pearl G-4-157999 | Fina Oil & Chemical Company only | McAllen (6900) | Hidalgo | 1 | 28.4K | 250K | Nov 1995 – Oct 1996 |
| Guerra, A. E. G-4-183143 | Hilcorp Energy Company only | McAllen Ranch (Guerra) | Hidalgo | 1 | 28.2K | 2.89M | Apr 2001 – Nov 2003 |
| Hargrove, H.B. G-4-135558 | Merit Energy Company only | McAllen Ranch (Vicksburg K Cons) | Hidalgo | 1 | 28.1K | 573K | Jan 1993 – Apr 2026 |
| McAllen, A. A. G-4-171597 | Merit Energy Company only | McAllen Ranch (Vksbg P-V,s Cons) | Hidalgo | 1 | 28K | 961K | Dec 1998 – Jan 2024 |
| McAllen Fieldwide Unit G-4-173095 | Total E&P USA, Inc. only | Belle Ferguson (Lo. Frio Cons.) | Hidalgo | 1 | 27.9K | 2.76M | Nov 1998 – Feb 2005 |
| McAllen, A. A. "B" G-4-145383 | Merit Energy Company only | McAllen Ranch (Vksbg L-V, N Cons | Hidalgo | 1 | 27.7K | 6.01M | May 1993 – Apr 2026 |
| McAllen, A. A. 'B' G-4-272599 | Merit Energy Company only | McAllen Ranch (Vksbg L-V, N Cons | Hidalgo | 1 | 27.7K | 2.43M | Feb 2014 – Apr 2026 |
| Woods Christian G-4-158686 | OXY USA Inc. only | McAllen Ranch (Vksbg P-V,s Cons) | Hidalgo | 1 | 27.6K | 2.1M | May 1996 – Sep 2014 |
| Guerra, A. E. G-4-235115 | Hilcorp Energy Company only | McAllen Ranch (Guerra) | Hidalgo | 1 | 27.6K | 3.12M | Jan 2008 – Oct 2009 |
| McAllen Fieldwide Unit G-4-259318 | Merit Energy Company only | McAllen-Pharr (Consolidated) | Hidalgo | 1 | 27.6K | 2.86M | Oct 2010 – Apr 2026 |
| McCall O-11-61101 | Delta C02, LLC only | Wasson | Yoakum | 1 | 27.4K | 164 | Jan 1993 – Jan 2016 |
| Scallions-Lehmann Unit O-3-25642 | Wildfire Energy Operating LLC only | Giddings (Eagleford) | Lee | 1 | 27.4K | 14.3K | Oct 2010 – Mar 2026 |
| Davis, S. M. O-8-6429 | Merkaz Drilling, LLC only | Callahan County Regular | Callahan | 67 | 27.2K | 14 | Jan 1993 – Mar 2026 |
| Guerra, E. E. G-4-189388 | Dewbre Petroleum Corporation only | McAllen Ranch (Guerra) | Hidalgo | 1 | 27.1K | 2.1M | May 2002 – Apr 2023 |
| Hill "A" G-4-127230 | Wynn-Crosby Energy, Inc. only | McAllen Ranch (Guerra, E.) | Hidalgo | 1 | 27K | 1.55M | Jan 1993 – Feb 2004 |