| McAllen, A. A. G-4-158393 | Shell Western E&P only | McAllen Ranch (Vksbg P-V,s Cons) | Hidalgo | 1 | 19.8K | 506K | Apr 1996 – Nov 1996 |
| Callihan, W. M. -A- O-1-987 | Castillo Oil Company LLC only | Luling-Branyon | Caldwell | 5 | 19.8K | 8.3K | by Jan 1993 – Jul 2026 |
| McAllen Fieldwide Unit G-4-196249 | Merit Energy Company only | McAllen-Pharr (Consolidated) | Hidalgo | 1 | 19.7K | 25.9M | Apr 2003 – Aug 2026 |
| Guerra, A. E. G-4-185498 | Chevron U. S. A. Inc. only | McAllen Ranch (Vicksburg Y) | Hidalgo | 1 | 19.7K | 1.66M | Sep 2001 – Mar 2003 |
| Neal 400 D O-9-17442 | Callon Petroleum Operating Co only | Spraberry (Trend Area) | Upton | 1 | 19.3K | 109K | Jun 2011 – Mar 2012 |
| McCall a Unit G-13-276218 | Eagleridge Operating, LLC only | Newark, East (Barnett Shale) | Montague | 1 | 19.1K | 823K | May 2014 – Aug 2026 |
| McAllen Fieldwide Unit G-4-137137 | Merit Energy Company only | McAllen-Pharr (Consolidated) | Hidalgo | 1 | 19.1K | 1.28M | by Jan 1993 – Nov 1996 |
| McAllen, A. A. 'B' G-4-275523 | Merit Energy Company only | McAllen Ranch (Vksbg L-V, N Cons | Hidalgo | 1 | 19K | 1.24M | Sep 2014 – Aug 2026 |
| Beaurline. A. W. G-4-196242 | Mueller Exploration, Inc. only | McAllen Ranch (Vksbg L-V, N Cons | Hidalgo | 1 | 19K | 2.81M | Jun 2003 – Jun 2026 |
| McAllen, A. A. G-4-275942 | Merit Energy Company only | McAllen Ranch (Vksbg L-V, N Cons | Hidalgo | 1 | 18.9K | 1.41M | Feb 2015 – May 2020 |
| McAllen Fieldwide Unit G-4-174117 | Merit Energy Company only | McAllen-Pharr (Consolidated) | Hidalgo | 1 | 18.8K | 4.5M | Aug 1998 – Apr 2024 |
| Woods Christian G-4-274897 | Merit Energy Company only | McAllen Ranch (Vksbg P-V,s Cons) | Hidalgo | 1 | 18.8K | 2.56M | Jul 2014 – Aug 2026 |
| Guerra, E. E. G-4-141999 | Dewbre Petroleum Corporation only | McAllen Ranch (Guerra) | Hidalgo | 1 | 18.7K | 4.43M | by Jan 1993 – Oct 2007 |
| Beaurline, A. W. G-4-160984 | Merit Energy Company only | McAllen Ranch (Vicksburg y, E.) | Hidalgo | 1 | 18.7K | 1.91M | Nov 1996 – Feb 2003 |
| McAllen Fieldwide Unit G-4-185697 | Merit Energy Company only | McAllen-Pharr (Consolidated) | Hidalgo | 1 | 18.7K | 3.28M | Sep 2001 – Aug 2026 |
| McAllen Fieldwide Unit G-4-37978 | Merit Energy Company only | McAllen-Pharr (Consolidated) | Hidalgo | 1 | 18.6K | 3.16M | by Jan 1993 – Aug 2026 |
| McAllen, A. A. "B" G-4-264146 | Merit Energy Company only | McAllen Ranch (Vksbg L-V, N Cons | Hidalgo | 1 | 18.6K | 876K | Aug 2011 – Dec 2023 |
| Callarman O-8-22618 | Interstate Explorations LLC only | Katlaco-Cook (Miss) | Eastland | 2 | 18.6K | 86.9K | by Jan 1993 – Jun 2023 |
| Pharr Fieldwide Unit G-4-191480 | Merit Energy Company only | McAllen-Pharr (Consolidated) | Hidalgo | 1 | 18.5K | 1.43M | Jul 2002 – Aug 2026 |
| McFarlane O-8-23439 | Southwest Gas Systems, Inc. only | Callahan County Regular | Callahan | 1 | 18.5K | 648K | by Jan 1993 – Aug 2026 |
| McAllen, A. A. G-4-262391 | Hilcorp Energy Company only | McAllen Ranch (Vksbg P-V,s Cons) | Hidalgo | 1 | 18.2K | 1.47M | Jun 2011 – Jul 2019 |
| Beaurline, A. W. G-4-190281 | Merit Energy Company only | McAllen Ranch (Vksbg P-V,s Cons) | Hidalgo | 1 | 18.2K | 1.29M | Aug 2002 – Jan 2015 |
| Callaghan Ranch G-4-210183 | Hilcorp Energy Company only | Finley-Webb (Lobo Cons) | Webb | 1 | 18.2K | 1.09M | Apr 2005 – Oct 2012 |
| Torrey Pines 20 O-10-45297 | Callon Petroleum Operating Co only | Spraberry (Trend Area) | Howard | 1 | 18.2K | 95.5K | Dec 2013 – Oct 2019 |
| Guerra, A. E. G-4-184466 | Chevron U. S. A. Inc. only | McAllen Ranch (Vicksburg Y) | Hidalgo | 1 | 18.1K | 864K | Jul 2001 – Jan 2006 |
| Coates G-4-156177 | Crimson Exploration Oper., Inc. only | McAllen Ranch (Vicksburg N) | Hidalgo | 1 | 17.6K | 983K | Oct 1995 – Apr 2015 |
| Guerra, A. E. G-4-242004 | Hilcorp Energy Company only | McAllen Ranch (Guerra) | Hidalgo | 1 | 17.5K | 1.73M | Jun 2008 – Feb 2026 |
| McAllen Fieldwide Unit G-4-247958 | Merit Energy Company only | McAllen-Pharr (Consolidated) | Hidalgo | 1 | 17.3K | 6.84M | Feb 2009 – Aug 2026 |
| Booth O-8-30942 | US. Fuels, Inc. only | Callahan County Regular | Callahan | 2 | 17.2K | 50.2K | Mar 2012 – Mar 2019 |
| Pharr Fieldwide Unit G-4-150485 | Merit Energy Company only | McAllen-Pharr (Consolidated) | Hidalgo | 1 | 17.1K | 1.09M | Apr 1994 – Aug 2026 |
| McAllen, A. A. G-4-224322 | Merit Energy Company only | McAllen Ranch (Vksbg L-V, N Cons | Hidalgo | 1 | 17.1K | 1.07M | Jan 2007 – Aug 2026 |
| McAllen, A. A. G-4-258792 | Hilcorp Energy Company only | McAllen Ranch (Vksbg P-V,s Cons) | Hidalgo | 1 | 17.1K | 727K | Mar 2010 – Aug 2026 |
| Pharr Fieldwide Unit G-4-204247 | Merit Energy Company only | McAllen-Pharr (Consolidated) | Hidalgo | 1 | 17K | 9.82M | Apr 2004 – Aug 2026 |
| Guerra, A.E. G-4-154815 | Texaco E & P Inc. only | McAllen Ranch (Vicksburg y, E.) | Hidalgo | 1 | 17K | 1.07M | Jul 1995 – May 1996 |
| McAllen, A.A. G-4-130399 | Merit Energy Company only | McAllen Ranch (Vksbg P-V,s Cons) | Hidalgo | 1 | 17K | 4.14M | by Jan 1993 – Aug 2026 |
| McCall-Brown Unit G-3-150156 | Magnolia Oil & Gas Operating LLC only | Giddings (Austin Chalk, Gas) | Fayette | 1 | 16.9K | 2.54M | Jun 1994 – Jul 2018 |
| Guerra, A. E. G-4-223502 | Hilcorp Energy Company only | McAllen Ranch (Guerra) | Hidalgo | 1 | 16.9K | 5.7M | Oct 2006 – May 2011 |
| Claunch O-1-162 | Eldon Oil Co. only | Calliham | McMullen | 3 | 16.7K | 25 | by Jan 1993 – Aug 2026 |
| Harris, L. T. O-8-12175 | Ruff Oil Co. only | Callahan County Regular | Callahan | 1 | 16.6K | 21 | by Jan 1993 – Aug 2026 |
| Callicott Brothers O-8-22921 | Petrocat Innovations, LLC only | Little Cone (Miss) | Stephens | 6 | 16.6K | 29.9K | by Jan 1993 – May 2026 |
| Jackson -E- O-8-501 | Ohlhausen Oil Company only | Callahan County Regular | Callahan | 18 | 16.6K | 22 | by Jan 1993 – Jul 2026 |
| Pharr Fieldwide Unit G-4-151482 | Merit Energy Company only | McAllen-Pharr (Consolidated) | Hidalgo | 1 | 16.6K | 2.46M | Jul 1994 – Aug 2026 |
| McAllen Fieldwide Unit G-4-222894 | Merit Energy Company only | McAllen-Pharr (Consolidated) | Hidalgo | 1 | 16.5K | 3.27M | Sep 2006 – Apr 2020 |
| McAllen, A. A. G-4-272602 | Merit Energy Company only | McAllen Ranch (Vksbg L-V, N Cons | Hidalgo | 1 | 16.5K | 734K | Jan 2014 – Aug 2026 |
| Guerra, E. E. G-4-183944 | Dewbre Petroleum Corporation only | McAllen Ranch (Guerra) | Hidalgo | 1 | 16.3K | 4.49M | Jul 2001 – Aug 2026 |
| McAllen,a.a. G-4-57433 | Shell Western E&P only | McAllen Ranch (Vicksburg S, S.) | Hidalgo | 1 | 16.3K | 617K | by Jan 1993 – Apr 1996 |
| McAllen, A. A. G-4-124661 | Merit Energy Company only | McAllen Ranch (Vksbg L-V, N Cons | Hidalgo | 1 | 16.2K | 1.68M | by Jan 1993 – Oct 2022 |
| Beaurline, A. W. G-4-121251 | Shell Western E&P Inc. only | McAllen Ranch (Guerra) | Hidalgo | 1 | 16.2K | 582K | by Jan 1993 – Apr 1996 |
| Pharr Fieldwide Unit G-4-151646 | Shell Western E&P only | McAllen (Hansen) | Hidalgo | 1 | 16.2K | 1.47M | May 1994 – Dec 2009 |
| Kristen A O-10-43608 | Callon Petroleum Operating Co only | Spraberry (Trend Area) | Midland | 2 | 16.2K | 21.4K | May 2013 – Jan 2016 |