| Briscoe/Hulsman G-1-65086 | Lewis Petro Properties, Inc. only | Catarina, SW. (Olmos) | Dimmit | 1 | 461 | 39.6K | May 1997 – Oct 2006 |
| Briscoe/Hulsman G-1-168647 | Lewis Petro Properties, Inc. only | Catarina, SW. (Olmos) | Dimmit | 1 | 456 | 35.2K | Jun 1998 – Nov 2013 |
| Halsell, Ewing O-1-2841 | Exploration Company, The only | Farias (Olmos) | Dimmit | 2 | 453 | 1 | by Jan 1993 – May 1997 |
| Briscoe, Dolph "B" G-1-222212 | Flint Oak Energy, LLC only | Briscoe Ranch (Olmos) | Dimmit | 1 | 451 | 188K | Sep 2006 – Sep 2023 |
| Covert, F. M. NCT A-4 O-1-4544 | 3-G Operating Company only | Pena Creek (San Miguel 3RD) | Dimmit | 3 | 448 | 4 | by Jan 1993 – Apr 1993 |
| Briscoe Ranch G-1-87359 | Rosetta Resources Operating LP only | Catarina, SW. (Olmos) | Dimmit | 1 | 447 | 43.7K | by Jan 1993 – May 2013 |
| McKnight -A- O-1-5438 | Uhc Petroleum Corporation only | Winter Garden (Olmos) | Dimmit | 9 | 439 | 4 | Dec 1993 – Aug 1998 |
| Bartlett O-1-13611 | Cuatro Petro Corp. only | Carrizo, S. (Olmos 2400) | Dimmit | 1 | 423 | 1.28K | by Jan 1993 – May 1996 |
| Briscoe, Dolph "C" O-1-14745 | Flint Oak Energy, LLC only | Briscoe Ranch (Olmos) | Dimmit | 1 | 413 | 1.69K | Oct 2006 – Jan 2010 |
| Gates Ranch "A" G-1-59990 | Lewis Petro Properties, Inc. only | Catarina, SW. (Olmos) | Dimmit | 1 | 412 | 78.6K | by Jan 1993 – Dec 2015 |
| San Pedro Ranch G-1-159568 | Prime Operating Company only | Hugh Fitzsimons (Olmos) | Dimmit | 1 | 396 | 13.9K | Jul 1996 – Jul 1997 |
| Kothmann G-1-222698 | Sage Energy Company only | Rocky Creek (Georgetown) | Dimmit | 1 | 387 | 84K | Jun 2006 – Apr 2011 |
| Amman, W.C. O-1-14006 | Ammann, Bryan only | Tocquigny (Olmos) | Dimmit | 1 | 356 | 0 | Dec 1995 – Jun 1997 |
| Votaw, Larry G-1-125865 | Carrizo Exploration, Inc. only | Saint Thirteen (Olmos No. 1) | Dimmit | 1 | 355 | 3.7K | by Jan 1993 – Sep 1998 |
| Briscoe (5140) G-1-232719 | Flint Oak Energy, LLC only | Briscoe Ranch (Olmos) | Dimmit | 1 | 353 | 135K | Aug 2007 – Oct 2012 |
| Gates Ranch -A- G-1-282822 | Lewis Petro Properties, Inc. only | Catarina, SW (San Miguel,oil) | Dimmit | 1 | 349 | 2.93K | Sep 2017 – Apr 2024 |
| Gates Ranch "K-D" G-1-130822 | Lewis Petro Properties, Inc. only | Catarina, SW. (Olmos) | Dimmit | 1 | 346 | 59.4K | by Jan 1993 – Mar 2002 |
| Fitzsimons, Hugh A. et al "Z" O-1-11756 | Prime Operating Company only | San Pedro | Dimmit | 2 | 339 | 15.4K | by Jan 1993 – Jul 1995 |
| Briscoe Cochina West Ranch G-1-272414 | Anadarko E&P Onshore LLC only | Briscoe Ranch (Eagleford) | Dimmit | 1 | 335 | 369 | Sep 2014 – Sep 2014 |
| NHL G-1-260470 | Ineos USA Oil & Gas LLC only | Indio Tanks (Pearsall) | Dimmit | 1 | 335 | 872K | Mar 2011 – Jul 2026 |
| Gates Ranch "A" G-1-65101 | Lewis Petro Properties, Inc. only | Catarina, SW. (Olmos) | Dimmit | 1 | 332 | 70.6K | by Jan 1993 – Jan 2016 |
| Sister Sue O-1-13003 | Brymer, Jack Contr. Serv. only | Pearsall (Austin Chalk) | Dimmit | 1 | 326 | 0 | Mar 1995 – Mar 1995 |
| Bowman G-1-232088 | Carrizo Exploration, Inc. only | Saint Thirteen (Olmos No. 1) | Dimmit | 1 | 324 | 19.9K | Sep 2007 – May 2008 |
| San Pedro Ranch G-1-241902 | Jonah Energy LLC only | Hugh Fitzsimmons (San Miguel) | Dimmit | 1 | 314 | 58.2K | Sep 2008 – Dec 2018 |
| Bowman G-1-232089 | Carrizo Exploration, Inc. only | Saint Thirteen (Olmos No. 1) | Dimmit | 1 | 314 | 58.8K | Sep 2007 – Mar 2012 |
| Gates Ranch G-1-72909 | Lewis Petro Properties, Inc. only | Catarina, SW. (Olmos) | Dimmit | 1 | 312 | 59.9K | by Jan 1993 – Jan 2016 |
| Kyle O-1-6434 | Bolin, D. M. only | Good Luck (San Miguel) | Dimmit | 1 | 307 | 8 | by Jan 1993 – Sep 1993 |
| O'Meara G-1-216216 | El Toro Resources LLC only | Pena Creek (Georgetown) | Dimmit | 1 | 306 | 183K | Feb 2004 – Aug 2026 |
| Kothman G-1-223793 | El Toro Resources LLC only | Pena Creek (Georgetown) | Dimmit | 1 | 305 | 207K | Jul 2006 – Dec 2025 |
| Gates Ranch G-1-84933 | Lewis Petro Properties, Inc. only | Catarina, SW. (Olmos) | Dimmit | 1 | 301 | 158K | by Jan 1993 – Jun 2012 |
| Frost National Bank Trustee G-1-134399 | San Antonio Gas & Oil, Inc. only | Dent Ingram (Olmos 1) | Dimmit | 1 | 293 | 16.3K | by Jan 1993 – Mar 1997 |
| Whataburger Unit G-1-135626 | Botasch Operating, LLC only | Ed Stumberg (Olmos A) | Dimmit | 1 | 291 | 120K | by Jan 1993 – Jul 2010 |
| Whataburger -a- Unit G-1-124622 | Botasch Operating, LLC only | Ed Stumberg (Olmos A) | Dimmit | 1 | 289 | 88.7K | by Jan 1993 – Jul 2010 |
| Briscoe, Dolph "B" G-1-243065 | Flint Oak Energy, LLC only | Briscoe Ranch (Olmos) | Dimmit | 1 | 289 | 6.59K | Jun 2008 – Sep 2021 |
| Briscoe/Hulsman G-1-164852 | Lewis Petro Properties, Inc. only | Catarina, SW. (San Miguel-Gas) | Dimmit | 1 | 288 | 32.5K | Jul 1997 – Apr 2007 |
| Briscoe Ranch G-1-77560 | Rosetta Resources Operating LP only | Catarina, SW. (Olmos) | Dimmit | 1 | 288 | 138K | by Jan 1993 – Jan 2014 |
| Briscoe Ranches, Inc. G-1-59581 | Rosetta Resources Operating LP only | Catarina, SW. (Olmos) | Dimmit | 1 | 284 | 34K | Jan 1997 – Jun 2005 |
| Gates Ranch G-1-75300 | Lewis Petro Properties, Inc. only | Catarina, SW. (Olmos) | Dimmit | 1 | 279 | 39.4K | by Jan 1993 – Dec 2015 |
| Gates Ranch G-1-115415 | Lewis Petro Properties, Inc. only | Catarina, SW. (Olmos) | Dimmit | 1 | 272 | 12.1K | by Jan 1993 – Feb 2002 |
| Briscoe "B" G-1-224975 | Crimson Energy Ptnrs III, L.L.C. only | Briscoe Ranch (Olmos) | Dimmit | 1 | 268 | 2.35K | Dec 2006 – May 2013 |
| Winn O-1-14756 | Carrizo Exploration, Inc. only | Pearsall (Buda, S.) | Dimmit | 2 | 265 | 6.02K | Mar 2006 – May 2009 |
| Hamilton, J. R. O-1-12764 | Exxcel Operating Company only | Pearsall (Austin Chalk) | Dimmit | 1 | 262 | 106 | by Jan 1993 – Jul 1994 |
| San Pedro Ranch G-1-139425 | Prime Operating Company only | Hugh Fitzsimons (Olmos) | Dimmit | 1 | 259 | 1.93K | by Jan 1993 – Apr 1993 |
| Briscoe "B" G-1-225961 | Crimson Energy Ptnrs III, L.L.C. only | Briscoe Ranch (Olmos) | Dimmit | 1 | 253 | 66.1K | Dec 2006 – Mar 2011 |
| Ingram-Bowman G-1-132520 | Carrizo Exploration, Inc. only | Dent Ingram (Olmos 1) | Dimmit | 1 | 239 | 84.1K | by Jan 1993 – Mar 2003 |
| Briscoe Ranches, Inc. G-1-86605 | Blackbrush O & G, Inc. only | Catarina, SW. (Olmos) | Dimmit | 1 | 235 | 17.1K | Oct 1996 – Mar 2004 |
| Hamilton Fee O-1-3742 | Hamilton, J. R. only | Hugh Fitzsimmons (San Miguel) | Dimmit | 1 | 232 | 25 | by Jan 1993 – Jul 2009 |
| Briscoe G-1-213534 | Swift Energy Operating, LLC only | Briscoe Ranch (Olmos) | Dimmit | 1 | 231 | 856 | Nov 2005 – Jun 2006 |
| Briscoe G-1-227662 | Flint Oak Energy, LLC only | Briscoe Ranch (Olmos) | Dimmit | 1 | 231 | 5.09K | May 2006 – Jun 2021 |
| Covert, F. M. G-1-221049 | El Toro Resources LLC only | Pena Creek (Georgetown) | Dimmit | 1 | 213 | 125K | Aug 2006 – Aug 2026 |