| Briscoe (5140) G-1-241896 | Flint Oak Energy, LLC only | Briscoe Ranch (Olmos) | Dimmit | 1 | 97 | 84.9K | Jul 2008 – May 2021 |
| Briscoe O-1-14086 | Union Pacific Resources Company only | Pearsall (Austin Chalk) | Dimmit | 1 | 96 | 0 | Sep 1996 – Sep 1996 |
| Gates Ranch "A" G-1-93189 | Lewis Petro Properties, Inc. only | Catarina, SW. (San Miguel-Gas) | Dimmit | 1 | 94 | 8.53K | by Jan 1993 – Nov 2005 |
| Briscoe/Hulsman G-1-69163 | U. S. Operating, Inc. only | Catarina, SW. (Olmos) | Dimmit | 1 | 91 | 4.83K | May 1997 – Jul 1998 |
| Gates Ranch "A" G-1-61990 | Lewis Petro Properties, Inc. only | Catarina, SW. (Olmos) | Dimmit | 1 | 90 | 73.6K | by Jan 1993 – Mar 2013 |
| Gates Ranch G-1-63702 | Lewis Petro Properties, Inc. only | Catarina, SW. (Olmos) | Dimmit | 1 | 90 | 22.7K | by Jan 1993 – Feb 2012 |
| Gates Ranch G-1-65686 | Lewis Petro Properties, Inc. only | Catarina, SW. (Olmos) | Dimmit | 1 | 88 | 137K | by Jan 1993 – Oct 2011 |
| Briscoe, Dolph "A" G-1-221531 | Swift Energy Operating, LLC only | Briscoe Ranch (Olmos) | Dimmit | 1 | 84 | 9.99K | Aug 2006 – Jan 2009 |
| Hamilton 1C O-1-13710 | Hamilton Oil Inc. only | Hugh Fitzsimmons (San Miguel) | Dimmit | 1 | 83 | 8 | Mar 1993 – Sep 1994 |
| Gates Ranch "A" G-1-88657 | Lewis Petro Properties, Inc. only | Catarina, SW. (San Miguel-Gas) | Dimmit | 1 | 81 | 6.86K | by Jan 1993 – Feb 2006 |
| Gates Ranch G-1-65516 | Lewis Petro Properties, Inc. only | Catarina, SW. (Olmos) | Dimmit | 1 | 78 | 122K | by Jan 1993 – Jan 2014 |
| Eardley Gas Unit G-1-161242 | Null, W.M. Operations, Inc. only | Evergreen Farms, NE. (1ST Olmos) | Dimmit | 1 | 77 | 55.2K | Sep 1996 – Jan 1998 |
| Asherton North Unit G-1-301810 | FW Eagle Ford I, LLC only | Briscoe Ranch (Eagleford) | Dimmit | 1 | 77 | 1.45K | Jun 2026 – Aug 2026 |
| Briscoe, Dolph "B" G-1-221539 | Flint Oak Energy, LLC only | Briscoe Ranch (Olmos) | Dimmit | 1 | 75 | 45K | Aug 2006 – Jan 2013 |
| Big Wells O-1-13505 | Texakoma Oil & Gas Corporation only | Pearsall (Austin Chalk) | Dimmit | 1 | 74 | 12 | by Jan 1993 – Jan 1993 |
| Gates Ranch "A" G-1-66946 | Lewis Petro Properties, Inc. only | Catarina, SW. (Olmos) | Dimmit | 1 | 74 | 5.51K | by Jan 1993 – Feb 2002 |
| Briscoe Ranch G-1-208365 | Rosetta Resources Operating LP only | Catarina, SW. (Olmos) | Dimmit | 1 | 72 | 122K | Jan 2005 – Jan 2014 |
| Kimble O-1-5076 | Dao Oil and Gas only | Evergreen Farms (Austin Chalk) | Dimmit | 1 | 70 | 4 | Feb 1994 – May 1994 |
| Gates Ranch "K-G" G-1-120940 | U. S. Operating, Inc. only | Catarina, SW. (Olmos) | Dimmit | 1 | 68 | 97K | by Jan 1993 – Mar 2014 |
| Gates Ranch "A" G-1-76693 | Lewis Petro Properties, Inc. only | Catarina, SW. (Olmos) | Dimmit | 1 | 67 | 81.9K | by Jan 1993 – Jan 2016 |
| Schilling, Thelma Unit O-1-8278 | Catarina Petroleum L. C. only | Blakeway (Dixon Sand) | Dimmit | 1 | 61 | 616 | by Jan 1993 – Sep 1996 |
| Cotulla G-1-90526 | Lewis Petro Properties, Inc. only | Catarina, SW. (Olmos) | Dimmit | 1 | 61 | 10.9K | by Jan 1993 – May 1994 |
| Gates Ranch G-1-61190 | Lewis Petro Properties, Inc. only | Catarina, SW. (Olmos) | Dimmit | 1 | 60 | 34.7K | by Jan 1993 – Jul 2015 |
| Baranowski Unit G-1-93362 | Texowa, LLC only | Blakeway (Strickland Sand) | Dimmit | 1 | 57 | 66.1K | by Jan 1993 – Jul 2010 |
| Myers O-1-14608 | Atlas Operating LLC only | Pena Creek (San Miguel 2ND) | Dimmit | 1 | 57 | 0 | Nov 2003 – Jan 2004 |
| Briscoe, Dolph "D" G-1-230414 | Flint Oak Energy, LLC only | Briscoe Ranch (Olmos) | Dimmit | 1 | 54 | 1.12K | Nov 2006 – Jan 2009 |
| Briscoe "B" G-1-228742 | Crimson Energy Ptnrs III, L.L.C. only | Briscoe Ranch (Olmos) | Dimmit | 1 | 53 | 1.74K | Mar 2007 – Dec 2011 |
| Gates Ranch "A" G-1-66003 | Lewis Petro Properties, Inc. only | Catarina, SW. (Olmos) | Dimmit | 1 | 53 | 34K | by Jan 1993 – Nov 2004 |
| Frost National Bank Trustee G-1-129567 | Carrizo Exploration, Inc. only | Dent Ingram (Olmos 1) | Dimmit | 1 | 53 | 20.2K | by Jan 1993 – May 1998 |
| Briscoe Ranch G-1-58299 | Rosetta Resources Operating LP only | Catarina, SW. (Olmos) | Dimmit | 1 | 50 | 142K | by Jan 1993 – Jan 2014 |
| Briscoe Ranch G-1-83966 | Rosetta Resources Operating LP only | Catarina, SW. (Olmos) | Dimmit | 1 | 49 | 25.1K | Aug 1996 – Dec 2012 |
| Gates Ranch "A" G-1-61989 | Lewis Petro Properties, Inc. only | Catarina, SW. (Olmos) | Dimmit | 1 | 48 | 53.2K | by Jan 1993 – Jan 2016 |
| Bowman, Ruth McLean G-1-74045 | L & J Exploration, LLC only | Dent Ingram (Olmos 1) | Dimmit | 1 | 48 | 206K | by Jan 1993 – May 2024 |
| San Pedro Ranch G-1-138919 | Prime Operating Company only | Hugh Fitzsimons (Olmos) | Dimmit | 1 | 47 | 11.2K | by Jan 1993 – Oct 1993 |
| Cotulla G-1-90528 | Lewis Petro Properties, Inc. only | Catarina, SW. (Olmos) | Dimmit | 1 | 42 | 7.96K | by Jan 1993 – May 1994 |
| Bowman, Ruth McLean O-1-2595 | Sage Energy Company only | Thirteen (Austin) | Dimmit | 1 | 41 | 3 | by Jan 1993 – Oct 1994 |
| Frost National Bank Trustee G-1-133822 | San Antonio Gas & Oil, Inc. only | Dent Ingram (Olmos 1) | Dimmit | 1 | 41 | 14.3K | by Jan 1993 – Aug 1995 |
| Kothman G-1-212844 | El Toro Resources LLC only | Pena Creek (Georgetown) | Dimmit | 1 | 40 | 6.63K | Mar 2008 – Feb 2009 |
| Briscoe (5140) G-1-232742 | Flint Oak Energy, LLC only | Briscoe Ranch (Olmos) | Dimmit | 1 | 38 | 22.2K | Feb 2008 – May 2021 |
| Briscoe (5140) G-1-232718 | Energyquest II, LLC only | Briscoe Ranch (Olmos) | Dimmit | 1 | 38 | 23.5K | Aug 2007 – Sep 2012 |
| Gates Ranch "A" G-1-88028 | Lewis Petro Properties, Inc. only | Catarina, SW. (San Miguel-Gas) | Dimmit | 1 | 38 | 9.31K | by Jan 1993 – Feb 2006 |
| Briscoe (5140) G-1-220363 | Energyquest II, LLC only | Briscoe Ranch (Olmos) | Dimmit | 1 | 36 | 59.2K | May 2006 – Aug 2009 |
| Burton, George O-1-12808 | Oatman, W. W. only | Big Wells (San Miguel) | Dimmit | 1 | 35 | 23 | by Jan 1993 – Nov 1994 |
| Gates Ranch G-1-117968 | Lewis Petro Properties, Inc. only | Catarina, SW. (Olmos) | Dimmit | 1 | 35 | 86.9K | by Jan 1993 – Jun 2001 |
| Gates Ranch G-1-68018 | Lewis Petro Properties, Inc. only | Catarina, SW. (Olmos) | Dimmit | 1 | 34 | 12.7K | by Jan 1993 – Mar 2002 |
| Whataburger G-1-121308 | Botasch Operating, LLC only | Ed Stumberg (Olmos A) | Dimmit | 1 | 33 | 27.2K | by Jan 1993 – Jul 2010 |
| Briscoe (5140) G-1-241904 | Flint Oak Energy, LLC only | Briscoe Ranch (Olmos) | Dimmit | 1 | 32 | 47.6K | Aug 2008 – Aug 2026 |
| Gates Ranch G-1-59872 | Lewis Petro Properties, Inc. only | Catarina, SW. (Olmos) | Dimmit | 1 | 32 | 82.1K | by Jan 1993 – Jan 2016 |
| Briscoe Ranch G-1-206695 | Rosetta Resources Operating LP only | Catarina, SW. (Olmos) | Dimmit | 1 | 29 | 50.4K | Jan 2005 – Jan 2014 |
| Briscoe Ranch G-1-58856 | Rosetta Resources Operating LP only | Catarina, SW. (Olmos) | Dimmit | 1 | 27 | 42.5K | by Jan 1993 – Jan 2014 |