| McDaniel, B. D. O-8-10537 | Landmaster Partners, Inc. only | Callahan County Regular | Callahan | 3 | 36.3K | 18 | Feb 1993 – Aug 2024 |
| McAllen, A.A. "B" G-4-133345 | Merit Energy Company only | McAllen Ranch (Vksbg L-V, N Cons | Hidalgo | 1 | 36.3K | 2.94M | Jan 1993 – Apr 2026 |
| McAllen, A. A. "B" G-4-188130 | Merit Energy Company only | McAllen Ranch (Vksbg L-V, N Cons | Hidalgo | 1 | 36.3K | 3.38M | Mar 2002 – Apr 2026 |
| Sealy-Smith O-8-22781 | Sands Energy LLC only | Callanan (Morris) | Coleman | 1 | 36.3K | 29.1K | Jan 1993 – Jan 2011 |
| McAllen, A. A. "B" G-4-234083 | Merit Energy Company only | McAllen Ranch (Vksbg L-V, N Cons | Hidalgo | 1 | 36.2K | 2.14M | Dec 2007 – May 2017 |
| Neal 500 O-9-17485 | Callon Petroleum Operating Co only | Spraberry (Trend Area) | Upton | 1 | 35.9K | 52.7K | Feb 2011 – Feb 2012 |
| Guerra, A. E. G-4-179265 | Chevron U. S. A. Inc. only | McAllen Ranch (Vicksburg y, E.) | Hidalgo | 1 | 35.9K | 2.33M | Aug 2000 – Nov 2004 |
| McAllen, A. A. G-4-208263 | Merit Energy Company only | McAllen Ranch (Vksbg P-V,s Cons) | Hidalgo | 1 | 35.6K | 2.25M | Dec 2004 – Apr 2026 |
| McCall Christie Unit O-13-27900 | W&W Oil and Gas, Inc. only | Dyemound, S. (Bend Conglomerate) | Montague | 1 | 35.5K | 28.6K | Jan 1993 – Apr 2026 |
| McAllen, A. A. "B" G-4-242065 | Merit Energy Company only | McAllen Ranch (Vksbg L-V, N Cons | Hidalgo | 1 | 35.5K | 1.77M | Sep 2008 – Apr 2026 |
| McAllen, A. A. G-4-124842 | Hilcorp Energy Company only | McAllen Ranch (Vksbg P-V,s Cons) | Hidalgo | 1 | 35.4K | 1.27M | Jan 1993 – Apr 2026 |
| McAllen, A. A. G-4-195161 | Hilcorp Energy Company only | McAllen Ranch (Vksbg P-V,s Cons) | Hidalgo | 1 | 35.2K | 1.17M | Apr 2003 – Apr 2026 |
| Woods Christian G-4-176835 | Merit Energy Company only | McAllen Ranch (Vicksburg N) | Hidalgo | 1 | 35K | 986K | Mar 2001 – Sep 2015 |
| Guerra, A.E. G-4-144968 | Texaco E & P Inc. only | McAllen Ranch (Vicksburg y, E.) | Hidalgo | 1 | 34.9K | 4.02M | Apr 1993 – Oct 1996 |
| Guerra, E.E. G-4-249521 | Dewbre Petroleum Corporation only | McAllen Ranch (Guerra) | Hidalgo | 1 | 34.5K | 4.52M | Apr 2009 – Apr 2026 |
| Guerra, A. E. G-4-213323 | Hilcorp Energy Company only | McAllen Ranch (Vicksburg y, E.) | Hidalgo | 1 | 34.3K | 1.95M | Jul 2005 – Dec 2016 |
| Callison a Unit O-13-32011 | EOG Resources, Inc. only | Newark, East (Barnett Shale) | Montague | 1 | 34.2K | 962K | Jul 2012 – Apr 2026 |
| Guerra, A. E. G-4-289793 | Hilcorp Energy Company only | McAllen Ranch (Vicksburg y, E.) | Hidalgo | 1 | 34.2K | 1.75M | Aug 2016 – Apr 2026 |
| Pharr Fieldwide Unit G-4-248850 | Merit Energy Company only | McAllen-Pharr (Consolidated) | Hidalgo | 1 | 34.1K | 2.12M | Apr 2009 – Apr 2026 |
| University Lands 23-2 O-9-17686 | Callon Petroleum Operating Co only | Spraberry (Trend Area) | Reagan | 3 | 33.9K | 40.2K | Sep 2011 – Nov 2014 |
| McAllen, A. A. G-4-64467 | Merit Energy Company only | McAllen Ranch (Vksbg L-V, N Cons | Hidalgo | 1 | 33.9K | 3.47M | Jan 1993 – Apr 2026 |
| Huebner, Pauline O-3-24429 | Callon (Eagle Ford) LLC only | Faith-Mag (Disc 3) | Matagorda | 1 | 33.8K | 91.6K | Aug 2003 – Sep 2004 |
| McAllen, A. A. G-4-189371 | Merit Energy Company only | McAllen Ranch (Vksbg P-V,s Cons) | Hidalgo | 1 | 33.7K | 2.54M | May 2002 – May 2017 |
| Annie O-10-39402 | Callon Petroleum Operating Co only | Sallie Ann (Spraberry-Wolfcamp) | Midland | 1 | 33.6K | 30.2K | Feb 2009 – Jul 2011 |
| McAllen, A. A. G-4-188054 | Merit Energy Company only | McAllen Ranch (Vksbg P-V,s Cons) | Hidalgo | 1 | 33.5K | 1.47M | Mar 2002 – May 2017 |
| Christian, Woods G-4-11970 | Shell Western E&P Inc. only | McAllen Ranch (Vicksburg P, Q) | Hidalgo | 1 | 33.5K | 1.65M | Jan 1993 – Nov 1996 |
| Guerra "a" Gas Unit G-4-208729 | Dewbre Petroleum Corporation only | McAllen Ranch (Guerra) | Hidalgo | 1 | 33.4K | 2.61M | Mar 2005 – Apr 2015 |
| McAllen, A. A. G-4-155192 | Merit Energy Company only | McAllen Ranch (Vksbg P-V,s Cons) | Hidalgo | 1 | 33.2K | 2.69M | Jul 1995 – Dec 2010 |
| McAllen, A. A. 'B' G-4-275976 | Merit Energy Company only | McAllen Ranch (Vksbg L-V, N Cons | Hidalgo | 1 | 33.1K | 2.6M | Feb 2015 – Apr 2026 |
| Woods Christian G-4-145612 | Merit Energy Company only | McAllen Ranch (Vicksburg K Cons) | Hidalgo | 1 | 33K | 1.78M | May 1993 – Apr 2026 |
| Guerra, A. E. G-4-224842 | Hilcorp Energy Company only | McAllen Ranch (Guerra) | Hidalgo | 1 | 32.9K | 3.18M | Dec 2006 – Nov 2016 |
| Beaurline, A. W. G-4-167989 | Merit Energy Company only | McAllen Ranch (Vicksburg S, E.) | Hidalgo | 1 | 32.9K | 733K | Mar 1998 – Apr 2026 |
| McDaniel, Wade O-8-312 | Midsco only | Callahan County Regular | Callahan | 33 | 32.8K | 13 | Mar 1993 – Mar 2026 |
| Guerra, A. E. G-4-192300 | Chevron U. S. A. Inc. only | McAllen Ranch (Guerra) | Hidalgo | 1 | 32.8K | 4.6M | Oct 2002 – Jan 2008 |
| McAllen Fieldwide Unit G-4-147682 | Merit Energy Company only | McAllen-Pharr (Consolidated) | Hidalgo | 1 | 32.7K | 1.02M | Nov 1993 – Apr 2026 |
| McAllen, A.A. G-4-123724 | Merit Energy Company only | McAllen Ranch (Vksbg P-V,s Cons) | Hidalgo | 1 | 32.7K | 727K | Jan 1993 – Jul 2024 |
| Woods Christian G-4-34873 | Merit Energy Company only | McAllen Ranch (Vksbg P-V,s Cons) | Hidalgo | 1 | 32.7K | 963K | Jul 1994 – Nov 2021 |
| McAllen, A. A. G-4-244987 | Hilcorp Energy Company only | McAllen Ranch (Vksbg P-V,s Cons) | Hidalgo | 1 | 32.6K | 1.7M | Nov 2008 – Apr 2026 |
| McAllen, A. A. "B" G-4-229678 | Merit Energy Company only | McAllen Ranch (Vksbg L-V, N Cons | Hidalgo | 1 | 32.5K | 4.84M | Jul 2007 – Apr 2026 |
| Kristen O-10-39533 | Callon Petroleum Operating Co only | Sallie Ann (Spraberry-Wolfcamp) | Midland | 1 | 32.4K | 41.2K | Sep 2008 – Apr 2013 |
| King, Kitty O-8-16382 | Rock Operating only | Callahan County Regular | Callahan | 2 | 32.4K | 7.35K | Jan 1993 – Apr 2026 |
| Guerra, A. E. G-4-170480 | Chevron U. S. A. Inc. only | McAllen Ranch (Vicksburg y, E.) | Hidalgo | 1 | 32.3K | 1.47M | Sep 1998 – Jan 2006 |
| Longoria G-4-144771 | American Exploration Company only | McAllen Ranch (Vicksburg N) | Hidalgo | 1 | 32.2K | 1.08M | Apr 1993 – Jun 1995 |
| McAllen, A. A. G-4-101498 | Merit Energy Company only | McAllen Ranch (Vksbg P-V,s Cons) | Hidalgo | 1 | 32.2K | 1.16M | Jan 1993 – May 2017 |
| Brown Unit O-8-27237 | Xtreme Operating Company LLC only | Callahan County Regular | Callahan | 23 | 32.2K | 4 | Jun 1994 – Aug 2013 |
| Edwards O-13-26890 | Callon Petroleum Operating Co only | Clay County Regular | Clay | 4 | 32K | 37.7K | Jan 1993 – Oct 2009 |
| Beaurline G-4-225759 | Dewbre Petroleum Corporation only | McAllen Ranch (Vksbg W-Y) | Hidalgo | 1 | 31.9K | 1.3M | Sep 2006 – Apr 2026 |
| Guerra, A. E. G-4-171956 | Hilcorp Energy Company only | McAllen Ranch (Vicksburg Y) | Hidalgo | 1 | 31.9K | 1.67M | Nov 1998 – Jan 2017 |
| Seale, F. L. Trust -B- O-8-11088 | CDJ Oil Company, LLC only | Callahan County Regular | Callahan | 5 | 31.7K | 141 | Jan 1993 – Apr 2026 |
| McAllen, A. A. G-4-193044 | Merit Energy Company only | McAllen Ranch (Vksbg L-V, N Cons | Hidalgo | 1 | 31.6K | 3.04M | Jan 2003 – Apr 2026 |