| Lavelle-Smith Unit O-8-28847 | Pony Express Corporate Trust only | Lake Coleman (Morris 2750) | Coleman | 17 | 241K | 72.2K | Sep 2000 – Aug 2024 |
| Arco Sterne Fee O-3-24162 | Neches Transport Inc. only | Spurger (5275) | Tyler | 1 | 68.8K | 230 | Feb 2002 – Aug 2026 |
| University "18-30A" G-10-185571 | WTG Exploration only | Quito, E. (Bell Canyon 5275) | Ward | 1 | 58.9K | 564K | Jul 2001 – Aug 2026 |
| Slick 531 O-4-13017 | Merit Energy Company only | Borosa, S. (Frio 4275) | Starr | 1 | 58.5K | 301K | Jul 2000 – Jun 2008 |
| Stewart Title O-3-28196 | Frio Resources, LLC only | League City (9275) | Galveston | 1 | 48.6K | 68.8K | Jan 2025 – Aug 2026 |
| University 12-18 O-10-37733 | Apache Corporation only | Quito, E. (Bell Canyon 5275) | Ward | 2 | 40.1K | 184K | Sep 2005 – May 2018 |
| Arco Hooks Oil Unit O-3-21911 | Premium Exploration Company only | Spurger (5275) | Tyler | 1 | 37.2K | 23.8K | by Jan 1993 – Oct 1997 |
| Lavelle O-8-20558 | Encon Services, Inc. only | Lake Coleman (Morris 2750) | Coleman | 7 | 35.8K | 147K | by Jan 1993 – Apr 2000 |
| Sealy-Smith O-8-20294 | Encon Services, Inc. only | Lake Coleman (Morris 2750) | Coleman | 7 | 29.6K | 224K | by Jan 1993 – Aug 2000 |
| Walker, Ida O-4-11965 | Synergy Oil & Gas, Inc. (A) only | Richard King (6275) | Nueces | 1 | 29.5K | 62.4K | by Jan 1993 – Jul 1996 |
| Morgan '275' O-8-31698 | HGN Operating I, LLC only | Ben Jack (Tannehill) | Stonewall | 1 | 20.9K | 0 | Jan 2015 – Oct 2021 |
| University "18-30A" G-10-178703 | WTG Exploration only | Quito, E. (Bell Canyon 5275) | Ward | 1 | 20.8K | 2.15M | Aug 2000 – Apr 2026 |
| University 22-18 O-10-37949 | E.G.L. Resources, Inc. only | Quito, E. (Bell Canyon 5275) | Ward | 1 | 18.7K | 230K | Apr 2006 – Aug 2017 |
| University 11-18 O-10-37758 | E.G.L. Resources, Inc. only | Quito, E. (Bell Canyon 5275) | Ward | 1 | 13.8K | 86.8K | Dec 2005 – Dec 2017 |
| University 21-18 O-10-37751 | Apache Corporation only | Quito, E. (Bell Canyon 5275) | Ward | 1 | 12.6K | 104K | Oct 2005 – Aug 2021 |
| State of Texas "DP" O-10-39171 | Jetta Operating Company, Inc. only | Quito, E. (Bell Canyon 5275) | Ward | 1 | 12K | 2.81K | Oct 2008 – Oct 2023 |
| Elliott, Paul O-13-14421 | Seitz, J. R. & Adam, Ltd. only | Collinsville, East (Strawn 2750) | Grayson | 2 | 6.68K | 21 | by Jan 1993 – Dec 1998 |
| London-Ward Unit O-4-12841 | Omega Energy, LLC only | Doughty, SW (9275) | Nueces | 1 | 5.89K | 124K | Apr 1999 – Apr 2009 |
| Arco Hooks Unit O-3-23716 | Premium Exploration Company only | Spurger (5275) | Tyler | 1 | 5.67K | 16.8K | Jul 1999 – Aug 2003 |
| HI 11-L (TX S/L M-97275) G-3-170759 | El Paso Production Gom Inc. only | High Island BLK 11L (Lent\han) | High IS-LB | 1 | 4.74K | 1.08M | Jul 1997 – Jul 1998 |
| Hall, J. F. G-13-91961 | Barnett Energy, Inc. only | Graham, Se(strawn 3275) | Young | 1 | 2.68K | 87.9K | by Jan 1993 – Jul 2026 |
| Arco Sterne Fee O-3-23337 | Premium Exploration Company only | Spurger (5275) | Tyler | 1 | 2.45K | 2.27K | Sep 1997 – Mar 1998 |
| Three-Whettos O-4-10366 | Omega Energy Corp. only | Doughty, SW (9275) | Nueces | 1 | 2.16K | 92.6K | by Jan 1993 – Jun 2007 |
| Walker, P. "A" G-10-185569 | WTG Exploration only | Quito, E. (Bell Canyon 5275) | Ward | 1 | 1.4K | 869K | Jul 2001 – Feb 2020 |
| Texaco Fee O-4-12940 | Saxet Energy, Ltd. only | Govt. Wells, N. (1275) | Duval | 1 | 1.33K | 29.6K | Feb 2000 – Mar 2002 |
| Walker, P. "A" G-10-180539 | WTG Exploration only | Quito, E. (Bell Canyon 5275) | Ward | 1 | 1.27K | 663K | Nov 2000 – Feb 2020 |
| Palafox State A2757 G-1-269731 | Lewis Petro Properties, Inc. only | Hawkville (Eagleford Shale) | Webb | 1 | 897 | 3.57M | Jun 2012 – Aug 2026 |
| Butler A O-8-15209 | Watson Oil & Gas, Inc. only | Duster, NE. (Marble Falls 2750) | Comanche | 1 | 820 | 21.8K | by Jan 1993 – Feb 2018 |
| Fasken State A2758 G-1-269597 | Lewis Petro Properties, Inc. only | Hawkville (Eagleford Shale) | Webb | 1 | 722 | 2.06M | Apr 2012 – Aug 2026 |
| McDaniel "A" G-10-180583 | WTG Exploration only | Quito, E. (Bell Canyon 5275) | Ward | 1 | 670 | 1.55M | Dec 2000 – Aug 2026 |
| Zengerle, W.O. G-2-98790 | Modern Exploration, Inc. only | Arneckeville (Yegua 5275) | De Witt | 1 | 643 | 196K | by Jan 1993 – Sep 2012 |
| Rogers, Fred E. G-8-137642 | Kroh Operating LLC only | Duster, NE. (Marble Falls 2750) | Comanche | 1 | 507 | 217K | by Jan 1993 – Sep 2018 |
| Walker, P. "A" G-10-183062 | WTG Exploration only | Quito, E. (Bell Canyon 5275) | Ward | 1 | 469 | 630K | Mar 2001 – Feb 2020 |
| Michael G-2-221655 | A & D Exploration Company only | Arneckeville (Yegua 5275) | De Witt | 1 | 435 | 190K | Aug 2006 – Feb 2016 |
| Hargis G-8-190619 | Upham Oil & Gas Company only | Brazos,east (Strawn 2275) | Parker | 1 | 413 | 236K | Jun 2002 – Jan 2015 |
| Mauney O-8-15478 | Watson Oil & Gas, Inc. only | Duster, NE. (Marble Falls 2750) | Comanche | 1 | 392 | 31K | by Jan 1993 – Aug 2005 |
| Kelly G-13-174253 | Jaid Energy, LLC only | Bryson, SW. (Conglomerate 4275) | Young | 1 | 373 | 82.4K | Apr 1999 – Mar 2017 |
| University 18-19 "A" G-10-182629 | Taylor, Ben J. Inc. only | Quito, E. (Bell Canyon 5275) | Ward | 1 | 325 | 315K | Apr 2001 – May 2015 |
| Thomas, B. G. G-8-138052 | Watson Oil & Gas, Inc. only | Duster, NE. (Marble Falls 2750) | Comanche | 1 | 325 | 107K | by Jan 1993 – Jun 2007 |
| Butler, Arnold "B" G-8-145300 | Watson Oil & Gas, Inc. only | Duster, NE. (Marble Falls 2750) | Comanche | 1 | 302 | 131K | by Jan 1993 – Nov 2024 |
| McDaniel "A" G-10-184167 | WTG Exploration only | Quito, E. (Bell Canyon 5275) | Ward | 1 | 254 | 337K | May 2001 – May 2026 |
| Barnes G-8-193319 | Mosaic Oil LLC only | Brazos,east (Strawn 2275) | Parker | 1 | 180 | 10.5K | Dec 2002 – May 2021 |
| Brushy Creek Gas Unit G-2-171345 | Brown, George R. Partnership,the only | Brushy Creek, North (Frio 2750) | Lavaca | 1 | 177 | 126K | Nov 1998 – Jan 2002 |
| Underwood, Ted G-8-133522 | Watson Oil & Gas, Inc. only | Duster, NE. (Marble Falls 2750) | Comanche | 1 | 132 | 21.1K | by Jan 1993 – Feb 2021 |
| Gilmore #2 O-13-25271 | G E Operating, Inc. only | Bryson, SW. (Conglomerate 4275) | Young | 1 | 130 | 2.49K | by Jan 1993 – Feb 1998 |
| Three-Whettos G-4-229969 | Omega Energy, LLC only | Doughty, SW (9275) | Nueces | 1 | 126 | 10.2K | Sep 2007 – Mar 2013 |
| Snider G-8-138053 | Watson Oil & Gas, Inc. only | Duster, NE. (Marble Falls 2750) | Comanche | 1 | 116 | 18.7K | by Jan 1993 – Jan 2014 |
| University 18-19 G-10-193779 | WTG Exploration only | Quito, E. (Bell Canyon 5275) | Ward | 1 | 67 | 178K | Dec 2002 – Jul 2024 |
| Welder G-2-173224 | Carrizo Oil & Gas, Inc. only | Poesta Creek (2750) | Bee | 1 | 58 | 538K | Dec 1998 – Sep 2006 |
| Fasken-State A2756 G-1-269621 | Lewis Petro Properties, Inc. only | Hawkville (Eagleford Shale) | Webb | 1 | 53 | 1.9M | Apr 2012 – Aug 2026 |