| Eubanks O-8-12151 | Fame Energy, Inc. only | Callahan County Regular | Callahan | 6 | 87 | 16 | by Jan 1993 – May 1994 |
| Callaghan Ranch G-4-146522 | Mobil Producing TX. & N.M. Inc. only | Finley-Webb (5200) | Webb | 1 | 86 | 298K | Aug 1993 – Apr 1999 |
| South Callaghan Ranch G-4-213591 | Aldine Oil and Gas, LP only | Beccero Creek (Lobo Cons.) | Webb | 1 | 86 | 38.2K | Sep 2005 – Aug 2026 |
| Goff, E. G. G-3-179689 | Gulfstar Properties, Inc. only | Callis (Frio 4300) | Wharton | 1 | 85 | 1.01M | Nov 2000 – Aug 2011 |
| McAllen Fieldwide Unit G-4-190612 | Shell Western E&P only | McAllen (Elkins 6300, North) | Hidalgo | 1 | 80 | 73K | Oct 2000 – Jun 2008 |
| Wylie A O-8-32827 | Haskit, Kendall only | Callahan County Regular | Callahan | 1 | 79 | 0 | Mar 2025 – Aug 2026 |
| McCalla Unit G-8-61222 | Harwell Enterprises Inc. only | Harken (Conglomerate) | Palo Pinto | 1 | 79 | 22.9K | by Jan 1993 – Jun 1996 |
| Hicks 97 O-8-6729 | Hess, Jerry Operating Co. only | Callahan County Regular | Callahan | 2 | 78 | 7 | by Jan 1993 – Sep 1995 |
| Beaurline, A. W. G-4-119440 | Shell Western E&P only | McAllen Ranch(vicksburg-U-V-,se) | Hidalgo | 1 | 76 | 14.9K | by Jan 1993 – Feb 1993 |
| Humphrey G-10-179192 | Callon (Permian) LLC only | MI Vida (Permo-Penn) | Reeves | 1 | 75 | 94.5K | Aug 2000 – Feb 2022 |
| Watts,l.v. O-8-15847 | Mixon, Robert N. only | Callahan County Regular | Callahan | 2 | 73 | 14 | by Jan 1993 – Feb 1994 |
| Callaway, Barry G-13-260854 | Formentera Operations LLC only | Newark, East (Barnett Shale) | Johnson | 1 | 73 | 1.23M | Dec 2010 – Aug 2026 |
| Kile, D. M. O-8-444 | Becker, Max only | Callahan County Regular | Callahan | 3 | 70 | 16 | Jul 1993 – Apr 1995 |
| Callaghan Ranch G-4-254025 | Forza Operating, LLC only | Olmitos, S. (Hirsch) | Webb | 1 | 70 | 62.1K | Jan 2010 – Mar 2014 |
| Callaghan Ranch G-4-125870 | Chesapeake Operating, Inc. only | Finley-Webb (Lobo Cons) | Webb | 1 | 66 | 347K | by Jan 1993 – Jan 2007 |
| Keirn, Pearl G-4-173985 | Totalfinaelf E&P USA Inc only | McAllen (F-1) | Hidalgo | 1 | 65 | 549K | Jun 1999 – Dec 2001 |
| Beaurline, A. W. G-4-170866 | Cabot Oil & Gas Corporation only | McAllen Ranch (Vksbg. S-T-U, N.) | Hidalgo | 1 | 65 | 63.3K | Sep 1998 – Dec 1998 |
| McAllen, A. A. G-4-107789 | White Oak Operating Company LLC only | La Jara (Frio) | Hidalgo | 1 | 64 | 104K | by Jan 1993 – Mar 2015 |
| Callaghan Ranch G-4-256532 | Forza Operating, LLC only | Olmitos, S. (Hirsch) | Webb | 1 | 63 | 11.5K | Apr 2010 – Nov 2012 |
| Arco Call & Jones O-3-25931 | Wapiti Operating, LLC only | Newton | Newton | 1 | 62 | 0 | Sep 2012 – Sep 2012 |
| Coppinger, B. M. O-8-488 | Arrowood Production Inc only | Callahan County Regular | Callahan | 1 | 62 | 30 | by Jan 1993 – Apr 1998 |
| Williams, L. L. G-8-144787 | Sequoia Fossil Fuels, Inc. only | Callahan County Regular | Callahan | 1 | 61 | 6.59K | Mar 1993 – Mar 1996 |
| South Callaghan Ranch G-4-142843 | Aldine Oil and Gas, LP only | Beccero Creek (Lobo Cons.) | Webb | 1 | 60 | 1.75M | by Jan 1993 – Jan 2011 |
| Callicott Brothers G-8-132952 | Petrocat Innovations, LLC only | M. Ross (Duffer) | Stephens | 1 | 60 | 44.1K | by Jan 1993 – Jul 2003 |
| Dudley O-8-14141 | H-B Oil Co. only | Callahan County Regular | Callahan | 1 | 59 | 20 | by Jan 1993 – Aug 1994 |
| Mask, J.&c. O-8-13703 | Targo Oil & Gas, Inc. only | Callahan County Regular | Callahan | 8 | 57 | 20 | by Jan 1993 – Nov 1995 |
| Callaway, P. S. GU G-13-156382 | BKV Barnett, LLC only | Newark, East (Barnett Shale) | Denton | 1 | 57 | 590K | Nov 1995 – Aug 2026 |
| Pharr Fieldwide Unit G-4-260417 | Merit Energy Company only | McAllen-Pharr (Consolidated) | Hidalgo | 1 | 51 | 36.7K | Jul 2022 – Aug 2026 |
| Keirn, Pearl G-4-177496 | Totalfinaelf E&P USA Inc only | McAllen (Hansen) | Hidalgo | 1 | 51 | 475K | Dec 1999 – Nov 2002 |
| Callaway -A- O-10-22377 | Pacific Exploration Oper Co, LLC only | Spraberry (Trend Area) | — | 0 | 50 | 0 | Aug 2010 – Aug 2010 |
| Davis, W. J. O-8-24777 | Westico Energy Co. only | John Callanan (Gray Sand) | Taylor | 1 | 49 | 596 | by Jan 1993 – Nov 1993 |
| Watkins, Addie C. Etal O-8-17113 | Wilson Well Service Inc. only | Callahan County Regular | Callahan | 1 | 49 | 21 | by Jan 1993 – Apr 1996 |
| Wylie 'Ed' O-8-32589 | Haskit, Kendall only | Callahan County Regular | Callahan | 1 | 48 | 0 | Nov 2025 – Aug 2026 |
| Rogers, Van H. O-8-8918 | Rich-Rock Oil Co. only | Callahan County Regular | Callahan | 3 | 46 | 16 | by Jan 1993 – Apr 1994 |
| McAllen, A. A. G-4-75023 | Hilcorp Energy Company only | McAllen Ranch (Vksbg P-V,s Cons) | Hidalgo | 1 | 43 | 1.54K | Mar 2005 – Jun 2005 |
| South Callaghan Ranch G-4-223559 | Rosetta Resources Operating LP only | Beccero Creek (Lobo Cons.) | Webb | 1 | 42 | 120K | Oct 2006 – Mar 2009 |
| McAllen, A.A. G-4-68645 | Forest Oil Corporation only | McAllen Ranch (Vicksburg Y) | Hidalgo | 1 | 41 | 2.46K | by Jan 1993 – Feb 1993 |
| Jones Ranch "A" G-4-88057 | King Ranch Energy, Inc. only | McAllen Ranch,n(vksbg. LO 14700) | Hidalgo | 1 | 40 | 83.9K | by Jan 1993 – Aug 1998 |
| Davis, J. T. Estate O-8-29016 | Low-End Oil LLC only | Callahan County Regular | Callahan | 1 | 37 | 0 | Aug 2001 – Apr 2004 |
| McCall-Fooshee O-13-4511 | Mountain Creek Oil Company, Inc. only | Fooshee (Strawn) | Montague | 1 | 37 | 11 | by Jan 1993 – Feb 1994 |
| South Callaghan Ranch G-4-253514 | Aldine Oil and Gas, LP only | Beccero Creek (Lobo Cons.) | Webb | 1 | 37 | 6.05K | Nov 2009 – Nov 2023 |
| Callaway, Gerald L. G-8-109090 | Texas Sands Resources, LLC only | Thrifty, S. (Chappel Reef) | Brown | 1 | 36 | 60K | by Jan 1993 – Mar 2010 |
| South Callaghan Ranch G-4-222999 | Rosetta Resources Operating LP only | Beccero Creek (Lobo Cons.) | Webb | 1 | 35 | 35.4K | Nov 2006 – Feb 2009 |
| Brown, H.C. -B- O-8-23387 | Doc's Hole Energy Dev. only | Callahan County Regular | Callahan | 1 | 33 | 7 | Mar 1993 – Jul 1994 |
| Creasy G-10-184692 | Callon (Permian) LLC only | MI Vida (Delaware) | Reeves | 1 | 33 | 115K | May 2001 – Apr 2015 |
| Calley, H.T. O-3-16340 | Chesapeake Operating, Inc. only | Giddings (Austin Chalk-3) | Fayette | 1 | 31 | 3 | by Jan 1993 – Jun 1993 |
| South Callaghan Ranch G-4-141506 | Aldine Oil and Gas, LP only | Beccero Creek (Lobo Cons.) | Webb | 1 | 30 | 537K | by Jan 1993 – Oct 2013 |
| Chatham "133" O-8-25978 | Conquistador Petroleum,inc. only | Callahan County Regular | Callahan | 1 | 29 | 72 | by Jan 1993 – Nov 1994 |
| Olson O-8-17876 | Becker, Max only | Callahan County Regular | Callahan | 1 | 27 | 20 | Mar 1993 – May 1995 |
| Goldsmith, Gladys O-8-19093 | Goldsmith, B.R. only | Callahan County Regular | Callahan | 2 | 26 | 11 | by Jan 1993 – Jan 1994 |