| McCallister O-13-28614 | County Line Resources LLC only | Young County Regular | Young | 1 | 3.29K | 2.74K | Aug 1993 – Jul 2026 |
| South Callaghan Ranch G-4-165991 | Aldine Oil and Gas, LP only | Beccero Creek (Lobo Cons.) | Webb | 1 | 3.28K | 1.6M | Dec 1997 – Aug 2026 |
| Jackson O-8-8208 | Sequoia Fossil Fuels, Inc. only | Callahan County Regular | Callahan | 25 | 3.27K | 21 | by Jan 1993 – Dec 1994 |
| Woods Christian G-4-152218 | Shell Western E&P Inc. only | McAllen Ranch (Vicksburg L) | Hidalgo | 1 | 3.26K | 64.3K | Nov 1994 – Apr 1995 |
| McAllister Unit O-14-6840 | Ridgeling Well Salvage only | Concannon (Granite Wash) | Wheeler | 1 | 3.25K | 6.14K | by Jan 1993 – Dec 1994 |
| McAllen Fieldwide Unit G-4-33662 | Total E&P USA, Inc. only | McAllen (Keirn 6100) | Hidalgo | 1 | 3.24K | 380K | by Jan 1993 – Nov 2001 |
| Odom, Blan -B- O-8-10866 | Allegro Operating, Inc. only | Callahan County Regular | Callahan | 2 | 3.24K | 21 | by Jan 1993 – Jan 1999 |
| McAllen,a. A. G-4-67648 | Shell Western E&P Inc. only | McAllen Ranch (Vicksburg S, SE.) | Hidalgo | 1 | 3.23K | 80.1K | by Jan 1993 – Dec 1995 |
| Evans, C. E. O-8-30636 | Window Operating Co., The only | Callanan (Morris) | Coleman | 1 | 3.22K | 0 | Aug 2010 – Feb 2017 |
| Westwood-Bond O-8-23363 | Clark, B. C. only | Callahan County Regular | Callahan | 1 | 3.21K | 21 | by Jan 1993 – May 2000 |
| Schaefer O-8-22259 | Callarman, David only | Katlaco-Cook (Miss) | Eastland | 1 | 3.19K | 20.9K | by Jan 1993 – Aug 2026 |
| McAllen, A. A. G-4-97627 | Fina Oil & Chemical Company only | McAllen Ranch (Vicksburg Y) | Hidalgo | 1 | 3.18K | 66.1K | by Jan 1993 – Jan 1994 |
| South Callaghan Ranch G-4-242073 | Aldine Oil and Gas, LP only | Beccero Creek (Middle Wilcox) | Webb | 1 | 3.17K | 447K | Sep 2008 – Nov 2023 |
| Park, J. F., et Al O-8-11809 | PM Oil & Gas, Inc. only | Callahan County Regular | Callahan | 35 | 3.17K | 14 | by Jan 1993 – May 2016 |
| Callaway O-8-26744 | Southeastern Resources Corp. only | Bloomquist (Lake Sand) | Stephens | 1 | 3.15K | 189K | by Jan 1993 – Mar 1998 |
| Finley, N. L. O-8-7970 | Wells Oilfield Services, Inc. only | Callahan County Regular | Callahan | 4 | 3.15K | 20 | by Jan 1993 – Dec 1999 |
| Kennard, Mabel -A- O-8-9762 | Ohlhausen Oil Company only | Callahan County Regular | Callahan | 1 | 3.14K | 40 | by Jan 1993 – Sep 2002 |
| Woods Christian G-4-158746 | Shell Western E&P Inc. only | McAllen Ranch (Vicksburg L) | Hidalgo | 1 | 3.13K | 125K | Jun 1996 – Apr 1997 |
| Callaghan-State G-4-156411 | Enron Oil & Gas Company only | Callaghan (Wilcox) | Webb | 1 | 3.12K | 418K | Sep 1995 – Feb 1996 |
| McAllen Fieldwide Unit G-4-160647 | Totalfinaelf E&P USA Inc only | McAllen (Hansen) | Hidalgo | 1 | 3.1K | 324K | Jul 1996 – Dec 2001 |
| South Callaghan Ranch G-4-141892 | Aldine Oil and Gas, LP only | Beccero Creek (Lobo Cons.) | Webb | 1 | 3.08K | 2.55M | by Jan 1993 – Aug 2026 |
| Ramsey, E.V. O-8-12960 | Sabre Oil and Gas Corp. only | Callahan County Regular | Callahan | 2 | 3.04K | 20K | by Jan 1993 – Oct 1998 |
| Callaway G-8-167175 | Petex only | Bloomquist (Lake Sand) | Stephens | 1 | 3.03K | 897K | Mar 1998 – Jan 2026 |
| South Callaghan Ranch G-4-235278 | Aldine Oil and Gas, LP only | Big Cowboy (Wilcox 6000) | Webb | 1 | 3.02K | 413K | Feb 2008 – Aug 2026 |
| McAllen, A. A. "Slot" G-4-246193 | Merit Energy Company only | McAllen Ranch (Guerra) | Hidalgo | 1 | 3.02K | 270K | Sep 2008 – Aug 2026 |
| McAllen Fieldwide Unit G-4-189683 | Merit Energy Company only | McAllen-Pharr (Consolidated) | Hidalgo | 1 | 3.01K | 188K | Feb 2002 – Aug 2026 |
| South Callaghan Ranch G-4-254620 | Aldine Oil and Gas, LP only | Beccero Creek (Lobo Cons.) | Webb | 1 | 2.99K | 625K | Nov 2009 – Aug 2026 |
| McAllen Fieldwide Unit G-4-189379 | Merit Energy Company only | McAllen-Pharr (Consolidated) | Hidalgo | 1 | 2.96K | 342K | Jan 2002 – May 2022 |
| McAllen Fieldwide Unit G-4-231798 | OXY USA Inc. only | McAllen-Pharr (Consolidated) | Hidalgo | 1 | 2.96K | 42.9K | May 2007 – Dec 2010 |
| Watts, Callie G-13-216190 | Upp Operating, LLC only | Newark, East (Barnett Shale) | Wise | 1 | 2.95K | 663K | Mar 2006 – Jun 2026 |
| Chambers, Martha O-8-6018 | Callaway Production, LLC only | Brown County Regular | Brown | 4 | 2.93K | 102 | by Jan 1993 – Jun 2001 |
| McAllister G-14-215202 | Presidio Petroleum LLC only | Lister (Granite Wash) | Wheeler | 1 | 2.91K | 410K | Nov 2005 – Dec 2016 |
| Ferguson, Belle G-4-169921 | OXY USA Inc. only | McAllen (6900) | Hidalgo | 1 | 2.88K | 359K | Aug 1997 – Apr 2006 |
| Dyer 2988 G-8-282235 | Petex only | Callahan, NE (Congl) | Callahan | 1 | 2.88K | 736K | Mar 2017 – Aug 2026 |
| McAllen, Robert G-4-177953 | Merit Energy Company only | The Doxology (LWR Vicksburg Cons | Hidalgo | 1 | 2.87K | 3.7M | Feb 2000 – Aug 2026 |
| Woods Christian G-4-276343 | Merit Energy Company only | McAllen Ranch (Vicksburg K Cons) | Hidalgo | 1 | 2.85K | 151K | Sep 2014 – Aug 2026 |
| Whitehead, L. K. O-8-497 | Abernathy Auto, Inc. only | Callahan County Regular | Callahan | 1 | 2.84K | 22 | by Jan 1993 – Apr 2004 |
| Surles, Marston O-8-436 | Bridger Petroleum, LLC only | Callahan County Regular | Callahan | 4 | 2.81K | 31 | by Jan 1993 – Nov 2000 |
| Mask O-8-23199 | Sandstone Services, LLC only | Callahan County Regular | Callahan | 14 | 2.8K | 110 | by Jan 1993 – Nov 2024 |
| Keirn, Pearl G-4-177519 | Totalfinaelf E&P USA Inc only | McAllen, South (Biedenharn 7630) | Hidalgo | 1 | 2.78K | 292K | Apr 2000 – Mar 2001 |
| South Callaghan Ranch G-4-230620 | Aldine Oil and Gas, LP only | Beccero Creek (Lobo Cons.) | Webb | 1 | 2.76K | 747K | Jul 2007 – Aug 2026 |
| South Callaghan Ranch G-4-233987 | Aldine Oil and Gas, LP only | Beccero Creek (Lobo Cons.) | Webb | 1 | 2.76K | 616K | Jan 2008 – Aug 2026 |
| Williams, L. O-8-315 | Sweet Texas T Energy LLC only | Callahan County Regular | Callahan | 14 | 2.76K | 20 | by Jan 1993 – Feb 2014 |
| Calloway O-8-26287 | Lawrence Energy Company only | Brown County Regular | Brown | 1 | 2.75K | 22 | by Jan 1993 – Jul 2026 |
| Humphrey G-10-176514 | Callon (Permian) LLC only | MI Vida (Delaware) | Reeves | 1 | 2.73K | 586K | Sep 1999 – Nov 2014 |
| West McAllen G-4-157369 | Fina Oil & Chemical Company only | McAllen (6900) | Hidalgo | 1 | 2.72K | 1.06M | Jul 1995 – Dec 1996 |
| Wylie 'C' O-8-32432 | Haskit, Kendall only | Callahan County Regular | Callahan | 4 | 2.71K | 0 | Mar 2020 – Aug 2026 |
| Ross, A.C. '110' O-8-31175 | Bacon Energy only | Callahan County Regular | Callahan | 3 | 2.71K | 0 | Feb 2013 – Jan 2025 |
| Dickey O-8-29072 | Frontier Operating Corporation only | Callahan County Regular | Callahan | 1 | 2.7K | 0 | Dec 2001 – Nov 2004 |
| McAllen, A.A. 'B' G-4-287196 | Merit Energy Company only | McAllen Ranch (Vksbg L-V, N Cons | Hidalgo | 1 | 2.7K | 138K | Jun 2019 – Aug 2026 |