| McAllen, A. A. G-4-183968 | Hilcorp Energy Company only | McAllen Ranch (Vicksburg Y) | Hidalgo | 1 | 1.68K | 61.4K | Jun 2001 – Aug 2001 |
| South Callaghan Ranch G-4-223365 | Aldine Oil and Gas, LP only | Beccero Creek (Lobo Cons.) | Webb | 1 | 1.67K | 309K | Nov 2006 – Aug 2026 |
| South Callaghan Ranch G-4-246188 | Aldine Oil and Gas, LP only | Beccero Creek (Lobo Cons.) | Webb | 1 | 1.66K | 218K | Oct 2008 – Oct 2023 |
| Howe North O-8-20510 | Sequoia Fossil Fuels, Inc. only | Callahan County Regular | Callahan | 10 | 1.65K | 18 | by Jan 1993 – Mar 1998 |
| Pharr Fieldwide Unit G-4-235128 | Merit Energy Company only | McAllen-Pharr (Consolidated) | Hidalgo | 1 | 1.65K | 719K | Nov 2007 – May 2017 |
| Carter O-8-27019 | Reo Operating LLC only | Callahan County Regular | Callahan | 1 | 1.65K | 19 | by Jan 1993 – Apr 2024 |
| Callison G-6-236458 | Enpower Resources Inc. only | Carthage, North (Cotton Valley) | Harrison | 1 | 1.63K | 516K | May 2008 – Jan 2023 |
| Dustin O-8-20087 | Callaway Production, LLC only | Brown County Regular | Brown | 2 | 1.63K | 13.5K | by Jan 1993 – Apr 2001 |
| McAllen Fieldwide Unit G-4-141569 | Shell Western E&P only | McAllen (Coke 5800 FB A) | Hidalgo | 1 | 1.62K | 57.5K | by Jan 1993 – Sep 1993 |
| South Callaghan Ranch G-4-142417 | Aldine Oil and Gas, LP only | Beccero Creek (Lobo Cons.) | Webb | 1 | 1.62K | 2.05M | by Jan 1993 – Aug 2026 |
| McAllen, A. A. G-4-266009 | Merit Energy Company only | McAllen Ranch (Vksbg P-V,s Cons) | Hidalgo | 1 | 1.62K | 83.5K | Dec 2011 – Oct 2012 |
| South Callaghan Ranch G-4-235416 | Aldine Oil and Gas, LP only | Brettchance, W. (Middle Wilcox) | Webb | 1 | 1.6K | 337K | Feb 2008 – Aug 2026 |
| Callison G-6-235465 | Enpower Resources Inc. only | Carthage, North (Cotton Valley) | Harrison | 1 | 1.6K | 325K | Mar 2008 – Dec 2022 |
| McAllen, A. A. G-4-34507 | Shell Western E&P Inc. only | McAllen Ranch (Vicksburg S) | Hidalgo | 1 | 1.59K | 219K | by Jan 1993 – Jul 1994 |
| McAllen Fieldwide Unit G-4-212984 | Merit Energy Company only | McAllen-Pharr (Consolidated) | Hidalgo | 1 | 1.59K | 1.15M | Apr 2005 – May 2025 |
| South Callaghan Ranch G-4-224686 | Aldine Oil and Gas, LP only | Beccero Creek (Lobo Cons.) | Webb | 1 | 1.58K | 525K | Jan 2007 – Aug 2026 |
| Callison G-6-246390 | Enpower Resources Inc. only | Carthage, North (Cotton Valley) | Harrison | 1 | 1.58K | 420K | Dec 2008 – Aug 2026 |
| McCallum, Bruce Gas Unit G-3-136484 | | Midfields, SW. (8550) | Matagorda | 1 | 1.56K | 37.1K | Aug 1995 – Jul 2003 |
| South Callaghan Ranch G-4-146868 | Aldine Oil and Gas, LP only | Beccero Creek (Lobo Cons.) | Webb | 1 | 1.53K | 892K | Sep 1993 – Aug 2026 |
| Edwards, S. E. O-8-10621 | Momentum Operating Co., Inc. only | Callahan County Regular | Callahan | 2 | 1.53K | 47 | by Jan 1993 – Aug 2010 |
| McAllen, A.A. "B" G-4-134342 | Merit Energy Company only | McAllen Ranch (Vksbg L-V, N Cons | Hidalgo | 1 | 1.53K | 318K | by Jan 1993 – Aug 1995 |
| South Callaghan Ranch G-4-247793 | Aldine Oil and Gas, LP only | Beccero Creek (Lobo Cons.) | Webb | 1 | 1.52K | 208K | Feb 2009 – Aug 2026 |
| South Callaghan Ranch G-4-139701 | Aldine Oil and Gas, LP only | Beccero Creek (Lobo Cons.) | Webb | 1 | 1.51K | 2.27M | by Jan 1993 – Aug 2026 |
| Jackson O-8-10858 | Van Operating, Ltd. only | Callahan County Regular | Callahan | 3 | 1.51K | 133 | by Jan 1993 – Nov 1995 |
| South Callaghan Ranch G-4-143971 | Aldine Oil and Gas, LP only | Beccero Creek (Lobo Cons.) | Webb | 1 | 1.51K | 823K | by Jan 1993 – Aug 2026 |
| Beaurline, A. W. G-4-172843 | Gn&j LLC only | McAllen Ranch (Vksbg L-V, N Cons | Hidalgo | 1 | 1.5K | 229K | Apr 1999 – Nov 2024 |
| South Callaghan Ranch G-4-163526 | Aldine Oil and Gas, LP only | Beccero Creek (Lobo Cons.) | Webb | 1 | 1.5K | 1.23M | May 1997 – Aug 2026 |
| Calliham G-14-204300 | Unbridled Resources, LLC only | Peery (Cleveland) | Ochiltree | 1 | 1.5K | 291K | Aug 2004 – Jan 2022 |
| Connelly, Faith O-8-23503 | Petrofieda only | Callahan County Regular | Callahan | 7 | 1.5K | 89 | by Jan 1993 – Jun 2021 |
| South Callaghan Ranch G-4-240274 | Aldine Oil and Gas, LP only | Beccero Creek (Lobo Cons.) | Webb | 1 | 1.49K | 217K | Jun 2008 – Aug 2026 |
| Callison G-6-238291 | Enpower Resources Inc. only | Carthage, North (Cotton Valley) | Harrison | 1 | 1.49K | 332K | May 2008 – Aug 2026 |
| South Callaghan Ranch G-4-151393 | Aldine Oil and Gas, LP only | Beccero Creek (Lobo Cons.) | Webb | 1 | 1.49K | 1.89M | Sep 1994 – Aug 2026 |
| Hall O-13-33924 | Best Petroleum Explorations,inc. only | Callendar (Weir) | Jack | 1 | 1.49K | 0 | Oct 2019 – May 2023 |
| Brown, Josie W. -A- O-8-416 | Wilco Properties, Inc. only | Callahan County Regular | Callahan | 11 | 1.48K | 17 | by Jan 1993 – May 1994 |
| Jackson Estate O-8-21984 | W.G. Oil only | Callahan County Regular | Callahan | 26 | 1.48K | 17 | by Jan 1993 – May 1997 |
| Keirn, Pearl G-4-173263 | Merit Energy Company only | McAllen (F-1) | Hidalgo | 1 | 1.47K | 1.01M | Jul 1998 – May 2017 |
| Wylie 'K' O-8-32063 | Haskit, Kendall only | Callahan County Regular | Callahan | 1 | 1.46K | 0 | Nov 2016 – Aug 2026 |
| South Callaghan Ranch G-4-165735 | Aldine Oil and Gas, LP only | Beccero Creek (Lobo Cons.) | Webb | 1 | 1.45K | 1.42M | Nov 1997 – Aug 2026 |
| Callaghan Ranch G-4-173909 | Denali Oil & Gas Management, LLC only | Finley-Webb (5100) | Webb | 1 | 1.45K | 215K | Jul 1999 – Mar 2005 |
| Elliott 55 "A" O-8-20509 | Los Hijos de Sanchez J LLC only | Callahan County Regular | Callahan | 2 | 1.42K | 962 | by Jan 1993 – Aug 1997 |
| Callaway/Marion O-8-29359 | Lawrence Energy Company only | Thrifty, S. (Chappel Reef) | Brown | 1 | 1.42K | 0 | Nov 2003 – Jul 2026 |
| McAllen Fieldwide Unit G-4-11949 | Fina Oil & Chemical Company only | McAllen (Hansen) | Hidalgo | 1 | 1.42K | 50.1K | by Jan 1993 – Jan 1994 |
| McAllen, A. A. G-4-183443 | Shell Western E&P only | McAllen Ranch (Vicksburg T, SE.) | Hidalgo | 1 | 1.41K | 36.8K | May 2001 – Jun 2001 |
| Callihan O-1-3206 | Eagle Ford Oil Co., Inc. only | Luling-Branyon | Caldwell | 2 | 1.41K | 167 | by Jan 1993 – May 2015 |
| South Callaghan Ranch G-4-164263 | Aldine Oil and Gas, LP only | Beccero Creek (Lobo Cons.) | Webb | 1 | 1.41K | 583K | Aug 1997 – Aug 2026 |
| Christian, Woods G-4-136401 | Shell Western E&P Inc. only | McAllen Ranch (Vicksburg K Cons) | Hidalgo | 1 | 1.4K | 99.3K | Apr 1993 – Apr 1998 |
| Keirn, Pearl G-4-193083 | OXY USA Inc. only | McAllen (Card 7100) | Hidalgo | 1 | 1.36K | 651K | Dec 2002 – Nov 2003 |
| Morriset "Z" O-8-25859 | Jenn Oil only | Callahan County Regular | Callahan | 1 | 1.36K | 29 | by Jan 1993 – Oct 1997 |
| Humphrey G-10-176517 | Callon (Permian) LLC only | MI Vida (Delaware) | Reeves | 1 | 1.35K | 685K | Jan 2000 – Jul 2023 |
| Guy O-8-28227 | Grayrock Energy II, LLC only | Callahan County Regular | Callahan | 1 | 1.35K | 40.8K | Jul 1997 – May 2009 |