| McAllen, A. A. G-4-263254 | Merit Energy Company only | McAllen Ranch (Vksbg L-V, N Cons | Hidalgo | 1 | 53.8K | 3.3M | Oct 2011 – Apr 2026 |
| McAllen, A. A. G-4-134912 | Merit Energy Company only | McAllen Ranch (Vksbg L-V, N Cons | Hidalgo | 1 | 52.8K | 2.87M | Jan 1993 – Apr 2026 |
| Callaway, Gib, -B- O-8-8825 | IS Energy, LLC only | Bissett Ranch (Strawn Reef) | Stonewall | 2 | 52.8K | 460 | Jan 1993 – Jan 2026 |
| McAllen, A. A. G-4-165643 | Merit Energy Company only | McAllen Ranch (Vksbg P-V,s Cons) | Hidalgo | 1 | 52.4K | 2.94M | Nov 1997 – Apr 2026 |
| McAllen, A. A. G-4-193810 | Merit Energy Company only | McAllen Ranch (Vksbg L-V, N Cons | Hidalgo | 1 | 52.2K | 1.96M | Feb 2003 – Apr 2026 |
| Beaurline, A. W. G-4-138959 | Merit Energy Company only | McAllen Ranch (Guerra) | Hidalgo | 1 | 52.1K | 4.06M | Jan 1993 – Apr 2002 |
| McAllen Fieldwide Unit G-4-185710 | Shell Western E&P only | McAllen (Hansen) | Hidalgo | 1 | 52K | 2.3M | Nov 2000 – Sep 2006 |
| Guerra, A. E. G-4-164980 | Texaco E & P Inc. only | McAllen Ranch (Vicksburg y, E.) | Hidalgo | 1 | 51.8K | 3.93M | Sep 1997 – Mar 1998 |
| Guerra, A.E. G-4-159849 | Texaco E & P Inc. only | McAllen Ranch (Guerra) | Hidalgo | 1 | 51.3K | 5.01M | Aug 1996 – Sep 1999 |
| McAllen Fieldwide Unit O-4-11916 | Merit Energy Company only | McAllen (Biedenharn, Upper) | Hidalgo | 4 | 51.3K | 316K | Jan 1993 – Dec 2000 |
| Beaurline G-4-173667 | Northern Pacific Oil Incorporatd only | McAllen Ranch (Vksbg L-V, N Cons | Hidalgo | 1 | 51.3K | 978K | Jan 1999 – May 2020 |
| McAllen, A. A. "B" G-4-230449 | Merit Energy Company only | McAllen Ranch (Vksbg L-V, N Cons | Hidalgo | 1 | 51.2K | 2.65M | Jun 2007 – Aug 2024 |
| Guerra, A.E. G-4-156729 | Chevron U. S. A. Inc. only | McAllen Ranch (Vicksburg y, E.) | Hidalgo | 1 | 51.2K | 4.6M | Dec 1995 – Mar 2005 |
| Beaurline, A. W. G-4-120249 | OXY USA Inc. only | McAllen Ranch (Vicksburg S, E.) | Hidalgo | 1 | 51K | 858K | Jan 1993 – Nov 2001 |
| McAllen, A. A. "B" G-4-248010 | Merit Energy Company only | McAllen Ranch (Vksbg L-V, N Cons | Hidalgo | 1 | 50.8K | 2.11M | Feb 2009 – Apr 2026 |
| McAllen, A. A. "B" G-4-236434 | Merit Energy Company only | McAllen Ranch (Vksbg L-V, N Cons | Hidalgo | 1 | 50.7K | 3.33M | Mar 2008 – May 2023 |
| McAllen, A. A. "B" G-4-181804 | Merit Energy Company only | McAllen Ranch (Vksbg L-V, N Cons | Hidalgo | 1 | 50.6K | 3.52M | Mar 2001 – Apr 2026 |
| Franke, Wm. O-8-465 | Simple Operating LLC only | Callahan County Regular | Callahan | 22 | 50.4K | 20 | Jan 1993 – Apr 2026 |
| McAllen, A. A. "B" G-4-257981 | Merit Energy Company only | McAllen Ranch (Vksbg L-V, N Cons | Hidalgo | 1 | 50.3K | 1.78M | Jul 2010 – Apr 2026 |
| Captain Call G-10-278657 | COG Operating LLC only | Sandbar (Bone Spring) | Culberson | 1 | 50.2K | 2.64M | Jan 2012 – Apr 2026 |
| Pembrook 10113 Pooled Unit O-9-18364 | Callon Petroleum Operating Co only | Lin (Wolfcamp) | Reagan | 1 | 50.1K | 45.8K | Dec 2013 – Jul 2014 |
| Woods Christian G-4-188003 | Merit Energy Company only | McAllen Ranch (Vicksburg N) | Hidalgo | 1 | 49.8K | 1.98M | Feb 2002 – Apr 2026 |
| Guerra, A. E. G-4-179921 | Chevron U. S. A. Inc. only | McAllen Ranch (Vicksburg y, E.) | Hidalgo | 1 | 49.8K | 3.72M | Oct 2000 – Feb 2006 |
| McAllen, A. A. 'B' G-4-275524 | Merit Energy Company only | McAllen Ranch (Vksbg L-V, N Cons | Hidalgo | 1 | 49.6K | 3.47M | Sep 2014 – Apr 2026 |
| Calloway, I. A. O-8-3824 | Pardue Oil, Inc. only | Stephens County Regular | Stephens | 2 | 49.5K | 567K | Jan 1993 – Apr 2020 |
| McAllen, A.A. "B" G-4-143925 | Merit Energy Company only | McAllen Ranch (Vksbg L-V, N Cons | Hidalgo | 1 | 48.4K | 4.94M | Jan 1993 – Apr 2026 |
| Guerra, A. E. G-4-183466 | Hilcorp Energy Company only | McAllen Ranch (Vksbg P-V,s Cons) | Hidalgo | 1 | 48.1K | 3.22M | May 2001 – Apr 2026 |
| Guerra, A. E. G-4-165668 | Texaco E & P Inc. only | McAllen Ranch (Guerra) | Hidalgo | 1 | 48K | 3.28M | Sep 1997 – Sep 2000 |
| McAllen, A. A. G-4-174417 | Hilcorp Energy Company only | McAllen Ranch (Vksbg P-V,s Cons) | Hidalgo | 1 | 47.9K | 3.09M | Aug 1999 – Apr 2026 |
| McAllen, A. A. G-4-159917 | Merit Energy Company only | McAllen Ranch (Vksbg P-V,s Cons) | Hidalgo | 1 | 47.5K | 1.95M | Aug 1996 – Apr 2026 |
| McAllen, A.A. G-4-86030 | Shell Western E&P only | McAllen Ranch (Vksbg P-V,s Cons) | Hidalgo | 1 | 47.4K | 1.48M | Jan 1993 – Jun 1998 |
| McAllen, A. A. -B- G-4-59641 | Merit Energy Company only | McAllen Ranch (Vksbg L-V, N Cons | Hidalgo | 1 | 47.4K | 3.88M | Jan 1993 – Apr 2026 |
| McAllen, A. A. G-4-205443 | Merit Energy Company only | McAllen Ranch (Vksbg P-V,s Cons) | Hidalgo | 1 | 47.3K | 2.52M | Nov 2004 – Apr 2026 |
| Frio 221 O-10-48940 | Callon Petroleum Operating Co only | Wolfbone (Trend Area) | Reeves | 1 | 47.2K | 142K | Jun 2018 – Apr 2020 |
| McAllen, A. A. G-4-270830 | Merit Energy Company only | McAllen Ranch (Vksbg L-V, N Cons | Hidalgo | 1 | 47.2K | 2.03M | Oct 2013 – Apr 2026 |
| McAllen Fieldwide Unit G-4-163912 | Merit Energy Company only | McAllen-Pharr (Consolidated) | Hidalgo | 1 | 47.1K | 9.5M | Nov 1996 – Apr 2026 |
| Guerra, A. E. G-4-192455 | Hilcorp Energy Company only | McAllen Ranch (Guerra) | Hidalgo | 1 | 47K | 4.56M | Dec 2002 – May 2014 |
| Hargrove, H.B. G-4-132072 | Merit Energy Company only | McAllen Ranch (Vicksburg K Cons) | Hidalgo | 1 | 46.9K | 3.56M | Jan 1993 – Apr 2026 |
| McAllen, A. A. "B" G-4-201228 | Merit Energy Company only | McAllen Ranch (Vksbg L-V, N Cons | Hidalgo | 1 | 46.4K | 4.04M | Apr 2004 – Apr 2026 |
| Pembrook 9121 Pooled Unit O-9-18248 | Callon Petroleum Operating Co only | Lin (Wolfcamp) | Reagan | 1 | 46.4K | 75.4K | Feb 2013 – Aug 2014 |
| Ercp Minerals O-1-19471 | Callon (Eagle Ford) LLC only | Eagleville (Eagle Ford-1) | La Salle | 4 | 46.3K | 56.6K | Nov 2018 – Dec 2018 |
| Pembrook 10112 Pooled Unit O-9-18363 | Callon Petroleum Operating Co only | Lin (Wolfcamp) | Reagan | 1 | 46.2K | 64.5K | Dec 2013 – Jul 2014 |
| Guerra, A. E. G-4-173754 | Hilcorp Energy Company only | McAllen Ranch (Vicksburg y, E.) | Hidalgo | 1 | 46K | 1.96M | Jun 1999 – Nov 2014 |
| Pharr Fieldwide Unit G-4-257975 | Merit Energy Company only | McAllen-Pharr (Consolidated) | Hidalgo | 1 | 45.9K | 4.12M | May 2010 – Apr 2026 |
| McFarlane, J. W. O-8-6172 | Adenryen, Ltd. Co. only | Callahan County Regular | Callahan | 25 | 45.7K | 21 | Jan 1993 – Apr 2026 |
| Owens, Ludie H., -C- O-8-8511 | Golden Horse Group Corp. only | Callahan County Regular | Callahan | 2 | 44.8K | 76 | Jan 1993 – Apr 2026 |
| Guerra, A. E. G-4-139434 | Hilcorp Energy Company only | McAllen Ranch (Vicksburg y, E.) | Hidalgo | 1 | 44.7K | 1.11M | Jan 1993 – Apr 2005 |
| Woods Christian G-4-143544 | Merit Energy Company only | McAllen Ranch (Vksbg P-V,s Cons) | Hidalgo | 1 | 44.3K | 1.56M | Jan 1993 – Apr 2026 |
| McAllen Fieldwide Unit G-4-195267 | Merit Energy Company only | McAllen-Pharr (Consolidated) | Hidalgo | 1 | 44K | 3.49M | Aug 2002 – Aug 2005 |
| Arco-Call O-3-9946 | Delta Exploration Company, Inc. only | Newton | Newton | 2 | 44K | 126K | Jan 1993 – May 2006 |