| Etchison, Horace G-4-148563 | American Exploration Company only | McAllen (Etchison) | Hidalgo | 1 | 2.15K | 262K | Feb 1994 – Jun 1997 |
| Hayes-Ezzell Ranch O-1-3490 | San Cajo Oil Company only | Calliham | McMullen | 4 | 2.15K | 56 | by Jan 1993 – Oct 1997 |
| South Callaghan Ranch G-4-168058 | Aldine Oil and Gas, LP only | Contempo (Lobo 2) | Webb | 1 | 2.15K | 1.34M | Apr 1998 – Aug 2026 |
| Simmons "B" O-8-30041 | US. Fuels, Inc. only | Callahan County Regular | Callahan | 1 | 2.15K | 10.4K | Jan 2008 – Jul 2015 |
| Burnside,m.l. & Hurst,l.l. O-8-9684 | Hunt Operating, LLC only | Callahan County Regular | Callahan | 9 | 2.14K | 95 | by Jan 1993 – Oct 2012 |
| South Callaghan Ranch G-4-232602 | Aldine Oil and Gas, LP only | Beccero Creek (Lobo Cons.) | Webb | 1 | 2.13K | 405K | Sep 2007 – Aug 2026 |
| Dugan O-8-29772 | Atwell Technical Services, Inc. only | Callahan County Regular | Callahan | 2 | 2.13K | 0 | Aug 2006 – Apr 2017 |
| Christian, Woods G-4-11968 | Shell Western E&P Inc. only | McAllen Ranch (Vicksburg P, Q) | Hidalgo | 1 | 2.11K | 217K | by Jan 1993 – Nov 1998 |
| South Callaghan Ranch G-4-150026 | Aldine Oil and Gas, LP only | Beccero Creek (Lobo Cons.) | Webb | 1 | 2.1K | 4M | May 1994 – Aug 2026 |
| Guerra, A. E. G-4-264266 | Hilcorp Energy Company only | McAllen Ranch (Vicksburg y, E.) | Hidalgo | 1 | 2.1K | 122K | Jun 2010 – Feb 2016 |
| South Callaghan Ranch G-4-162556 | Aldine Oil and Gas, LP only | Beccero Creek (Lobo Cons.) | Webb | 1 | 2.1K | 1.6M | Apr 1997 – Aug 2026 |
| UL Sugarloaf D 20-37-48 O-10-53762 | Callon Permian II, LLC only | Phantom (Wolfcamp) | Winkler | 1 | 2.09K | 0 | Jan 2022 – Jan 2022 |
| Callaghan Ranch G-4-205378 | Chesapeake Operating, Inc. only | Finley-Webb (Upper Cons) | Webb | 1 | 2.07K | 323K | Oct 2004 – Aug 2008 |
| Calla Mae A O-9-6394 | Quail Ridge Petroleum LLC only | Arledge (Penn Sand) | Coke | 5 | 2.06K | 27.1K | by Jan 1993 – Aug 2026 |
| South Callaghan Ranch G-4-247386 | Aldine Oil and Gas, LP only | Beccero Creek (Lobo Cons.) | Webb | 1 | 2.05K | 264K | Jan 2009 – Aug 2026 |
| Burnam, M.G. O-8-14928 | 1836 Energy LLC only | Callahan County Regular | Callahan | 3 | 2.05K | 17 | by Jan 1993 – Apr 2023 |
| Edwards, S. E. O-8-10797 | Allegro Operating, Inc. only | Callahan County Regular | Callahan | 5 | 2.03K | 21 | by Jan 1993 – Jan 1999 |
| McAllen Fieldwide Unit G-4-43386 | Fina Oil & Chemical Company only | McAllen (Hansen) | Hidalgo | 1 | 2.03K | 443K | by Jan 1993 – Jun 1997 |
| Hickman O-8-10957 | King Oil & Gas Co. only | Callahan County Regular | Callahan | 6 | 2.02K | 0 | Feb 1997 – May 2004 |
| South Callaghan Ranch G-4-144024 | Aldine Oil and Gas, LP only | Beccero Creek (Lobo Cons.) | Webb | 1 | 2.01K | 2.36M | by Jan 1993 – Aug 2026 |
| South Callaghan Ranch G-4-119780 | Aldine Oil and Gas, LP only | Brettchance (Lobo 6) | Webb | 1 | 2K | 1.38M | by Jan 1993 – Aug 2026 |
| Callaghan Ranch G-4-211521 | Hilcorp Energy Company only | Finley-Webb (Lobo Cons) | Webb | 1 | 1.98K | 951K | May 2005 – Nov 2020 |
| South Callaghan Ranch G-4-235232 | Aldine Oil and Gas, LP only | Beccero Creek (Lobo Cons.) | Webb | 1 | 1.97K | 280K | Jan 2008 – Aug 2026 |
| Keirn, Pearl, Unit G-4-11901 | Fina Oil & Chemical Company only | McAllen (Keirn 6100) | Hidalgo | 1 | 1.96K | 311K | by Jan 1993 – May 1999 |
| South Callaghan Ranch G-4-223396 | Aldine Oil and Gas, LP only | Beccero Creek (Lobo Cons.) | Webb | 1 | 1.91K | 743K | Sep 2006 – Aug 2026 |
| Keirn, Pearl G-4-174783 | Merit Energy Company only | McAllen (Keirn) | Hidalgo | 1 | 1.91K | 1.28M | Jun 1999 – Mar 2022 |
| Ruby O-9-18449 | Callon Petroleum Operating Co only | Block 4 (Devonian) | Upton | 1 | 1.9K | 4.26K | Dec 2013 – Oct 2014 |
| Goldston G-4-122551 | Wynn-Crosby Energy, Inc. only | McAllen Ranch (Guerra, E.) | Hidalgo | 1 | 1.89K | 118K | by Jan 1993 – Dec 2003 |
| Havens, Silas O-8-468 | Ayers, R.B. only | Callahan County Regular | Callahan | 5 | 1.89K | 20 | Feb 1993 – Sep 2002 |
| McAllen, Robert G-4-238084 | Merit Energy Company only | The Doxology (LWR Vicksburg Cons | Hidalgo | 1 | 1.88K | 2.62M | May 2008 – Aug 2026 |
| South Callaghan Ranch G-4-141896 | Aldine Oil and Gas, LP only | Beccero Creek (Lobo Cons.) | Webb | 1 | 1.85K | 4.43M | by Jan 1993 – Aug 2026 |
| Calliham G-14-111525 | Questar Expl. and Prod. Co. only | Peery (Cleveland) | Ochiltree | 1 | 1.84K | 292K | by Jan 1993 – Feb 2005 |
| South Callaghan Ranch G-4-193271 | Aldine Oil and Gas, LP only | Beccero Creek (Lobo Cons.) | Webb | 1 | 1.84K | 1.15M | Jan 2003 – Aug 2026 |
| Jobe O-8-29819 | Beasley Well Service Inc. only | Callahan County Regular | Callahan | 1 | 1.83K | 0 | Oct 2006 – Feb 2020 |
| Callison G-6-235397 | Enpower Resources Inc. only | Carthage, North (Cotton Valley) | Harrison | 1 | 1.83K | 250K | Oct 2007 – Aug 2026 |
| Isbell O-8-27380 | Kasle Energy Inc. only | Callahan County Regular | Callahan | 1 | 1.83K | 44.3K | Dec 1994 – Jun 2000 |
| Neumann O-8-25105 | Neumann Ventures, Inc. only | Callahan County Regular | Callahan | 9 | 1.8K | 21 | by Jan 1993 – Dec 2000 |
| South Callaghan Ranch G-4-142543 | Aldine Oil and Gas, LP only | Big Cowboy (Lobo) | Webb | 1 | 1.8K | 1.25M | by Jan 1993 – Aug 2026 |
| Callaghan Ranch G-4-205991 | Hilcorp Energy Company only | Finley-Webb (Lobo Cons) | Webb | 1 | 1.8K | 620K | Dec 2004 – Jun 2020 |
| Bond, E. F. O-8-29737 | Midsco only | Callahan County Regular | Callahan | 4 | 1.76K | 0 | Mar 2009 – Jul 2026 |
| South Callaghan Ranch G-4-168018 | Aldine Oil and Gas, LP only | Beccero Creek (Lobo Cons.) | Webb | 1 | 1.76K | 742K | Mar 1998 – Aug 2026 |
| Roller Estate O-13-5271 | McCallum, Donald D. only | Wichita County Regular | Wichita | 9 | 1.75K | 48 | by Jan 1993 – Jun 2004 |
| Neuman, J. O-8-17021 | Masada Oil & Gas Company Ltd. only | Callahan County Regular | Callahan | 15 | 1.73K | 21 | by Jan 1993 – Oct 1997 |
| South Callaghan Ranch G-4-194401 | Aldine Oil and Gas, LP only | Beccero Creek (Lobo Cons.) | Webb | 1 | 1.72K | 594K | Apr 2003 – Aug 2026 |
| Callow 2 Unit G-6-254405 | CR2 Energy LLC only | Carthage (Cotton Valley) | Panola | 1 | 1.72K | 258K | Sep 2009 – Jun 2014 |
| Krusemark, H. F. G-4-154148 | Dominion Oklahoma Texas E&P, Inc only | McAllen (F-1) | Hidalgo | 1 | 1.71K | 352K | Apr 1994 – Aug 1999 |
| South Callaghan Ranch G-4-194082 | Aldine Oil and Gas, LP only | Beccero Creek (Lobo Cons.) | Webb | 1 | 1.71K | 968K | Jan 2003 – Aug 2026 |
| McAllen, A.A. "B" G-4-128390 | Shell Western E&P Inc. only | McAllen Ranch (Vicksburg L, R-1) | Hidalgo | 1 | 1.71K | 120K | Mar 1995 – Nov 1997 |
| South Callaghan Ranch G-4-153170 | Aldine Oil and Gas, LP only | Callaghan, N. (Wilcox, Lo.) | Webb | 1 | 1.71K | 2.3M | Jan 1995 – Aug 2026 |
| McAllen, A.A. G-4-56863 | Shell Western E&P only | McAllen Ranch (Vicksburg S) | Hidalgo | 1 | 1.7K | 15.3K | Jan 1996 – Jun 2001 |