| Webb Oil Unit II O-1-15817 | Lodel Energy Resources Corporati only | Drummond (Edwards 1800) | Caldwell | 6 | 8.82K | 0 | Apr 2011 – Aug 2026 |
| BMT Aviator G-4-206634 | EOG Resources, Inc. only | Zwebb (10350) | Webb | 1 | 8.77K | 2.16M | Dec 2004 – Oct 2014 |
| Ray J Thomasma "B" G-4-204778 | Hilcorp Energy Company only | Zwebb (10350) | Zapata | 1 | 8.67K | 1.51M | Jun 2004 – Aug 2026 |
| BMT/K&H G-4-186074 | Mountain V Texas, LLC only | Zwebb (10350) | Webb | 1 | 8.66K | 3.44M | Sep 2001 – Aug 2026 |
| Webb "T" O-14-7774 | Unit Petroleum Company only | Mendota, NW. (Granite Wash, SW.) | Hemphill | 2 | 8.61K | 85.4K | Apr 2007 – Aug 2010 |
| Slator Ranch "C" G-4-176269 | Mountain V Texas, LLC only | Zwebb (10350) | Zapata | 1 | 8.53K | 798K | Feb 2000 – Aug 2026 |
| Webb, Lois G-14-139996 | Mmgl Txph, LLC only | Mendota, NW. (Douglas, Lo.) | Roberts | 1 | 8.51K | 683K | by Jan 1993 – Jan 2017 |
| Webb Unit O-1-8484 | Riverstone Operating LLC only | Salt Flat | Caldwell | 2 | 8.35K | 31 | by Jan 1993 – May 2024 |
| Flora Webb Unit O-1-6796 | Delong, Horace only | Jourdanton (Recklaw) | Atascosa | 2 | 8.27K | 63 | by Jan 1993 – Apr 2025 |
| Webb County School Board G-4-270140 | Aldine Oil and Gas, LP only | Big Cowboy (Lobo) | Webb | 1 | 8.23K | 1.15M | Mar 2013 – Aug 2026 |
| Webb, Leslie Etal -M- G-14-75045 | Mmgl Txph, LLC only | Mendota, NW. (Cherokee) | Hemphill | 1 | 8.23K | 746K | by Jan 1993 – Aug 2026 |
| Webb County School Board G-4-151412 | Proline Energy Resources Inc only | Big Cowboy (Lobo) | Webb | 1 | 8.22K | 1.37M | Oct 1994 – Jul 2025 |
| Webb et al "P" G-14-243506 | Mewbourne Oil Company only | Mendota, NW. (Granite Wash) | Hemphill | 1 | 8.17K | 354K | Sep 2008 – Aug 2026 |
| De Los Santos O-4-11958 | GO-Energy Co. only | Jasper-Webb (Yegua 3500) | Webb | 1 | 8.09K | 20 | by Jan 1993 – Nov 1994 |
| Webb County School Board G-4-120751 | Faulconer, Vernon E., Inc. only | Big Cowboy (Lobo) | Webb | 1 | 8.07K | 667K | by Jan 1993 – Feb 2011 |
| Webb County School Land 504 G-1-287700 | Lewis Petro Properties, Inc. only | Hawkville (Eagleford Shale) | Webb | 1 | 8.07K | 4.73M | Jan 2021 – Aug 2026 |
| Webb County School Board G-4-270546 | Aldine Oil and Gas, LP only | Big Cowboy (Lobo) | Webb | 1 | 7.78K | 825K | Mar 2013 – Aug 2026 |
| BMT/K&H G-4-181318 | Mountain V Texas, LLC only | Zwebb (10350) | Webb | 1 | 7.72K | 6.02M | Jan 2001 – Aug 2026 |
| BMT/K&H G-4-187777 | Mountain V Texas, LLC only | Zwebb (10350) | Webb | 1 | 7.6K | 1.23M | Jan 2002 – Aug 2026 |
| Webb County School Board G-4-270117 | Aldine Oil and Gas, LP only | Big Cowboy (Lobo) | Webb | 1 | 7.52K | 1.04M | Jan 2013 – Aug 2026 |
| Vaquillas Borrego G-4-238068 | Killam Oil Co., Ltd. only | Zwebb (10350) | Webb | 1 | 7.5K | 1.35M | Jan 2008 – Apr 2014 |
| Webb, T.C. -A- O-1-11116 | K2 Petroleum, Inc. only | Somerset | Atascosa | 5 | 7.36K | 157 | by Jan 1993 – Aug 2026 |
| BMT/K&H G-4-178699 | Mountain V Texas, LLC only | Zwebb (10350) | Webb | 1 | 7.26K | 5.19M | Aug 2000 – Aug 2026 |
| Webb "A" G-14-258645 | Unit Petroleum Company only | Mendota, NW. (Granite Wash) | Hemphill | 1 | 7.23K | 328K | Mar 2010 – Aug 2026 |
| BMT/K&H G-4-184605 | Mountain V Texas, LLC only | Zwebb (10350) | Webb | 1 | 7.16K | 1.84M | Aug 2001 – Aug 2026 |
| Webb G-14-220227 | Mmgl Txph, LLC only | Mendota, NW. (Granite Wash) | Hemphill | 1 | 7.14K | 465K | Aug 2006 – Jun 2021 |
| Slator Ranch "A" G-4-176950 | Mountain V Texas, LLC only | Zwebb (10350) | Zapata | 1 | 6.98K | 742K | Apr 2000 – Aug 2026 |
| McGrath G-4-182943 | Mountain V Texas, LLC only | Zwebb (10350) | Webb | 1 | 6.98K | 2.35M | May 2001 – Aug 2026 |
| Webb, Leslie et Al G-14-76992 | Mmgl Txph, LLC only | Mendota, NW. (Cherokee) | Hemphill | 1 | 6.87K | 595K | by Jan 1993 – Aug 2026 |
| Webb 'A' G-14-277997 | Unit Petroleum Company only | Mendota, NW. (Granite Wash) | Hemphill | 1 | 6.81K | 500K | Mar 2015 – Aug 2023 |
| BMT/K&H G-4-182666 | Mountain V Texas, LLC only | Zwebb (10350) | Webb | 1 | 6.8K | 1.11M | Apr 2001 – Aug 2026 |
| Webb, Arthur et al "S" G-14-156900 | Mmgl Txph, LLC only | Mendota, NW. (Cherokee) | Hemphill | 1 | 6.8K | 976K | Dec 1995 – Aug 2026 |
| Webb County School Board G-4-270889 | Aldine Oil and Gas, LP only | Beccero Creek (Lobo Cons.) | Webb | 1 | 6.76K | 493K | Aug 2013 – Aug 2026 |
| Webb, Leslie Etal -R- G-14-70453 | Mmgl Txph, LLC only | Mendota, NW. (Cherokee) | Hemphill | 1 | 6.7K | 738K | by Jan 1993 – Aug 2026 |
| Webb Gas Unit G-6-144067 | McGoldrick Oil Company only | Oak Hill, S. (Travis Peak) | Rusk | 1 | 6.57K | 223K | by Jan 1993 – Sep 1995 |
| Webb, B. G. G-4-213166 | Amerril Energy LLC only | Flour Bluff (Deep Consol.) | Nueces | 1 | 6.56K | 857K | May 2005 – Nov 2015 |
| Webb County School Land 504 G-1-287695 | Lewis Petro Properties, Inc. only | Hawkville (Eagleford Shale) | Webb | 1 | 6.44K | 4.74M | Jan 2021 – Aug 2026 |
| Webb, Flora O-1-7113 | Delong, Horace only | Jourdanton (Queen City) | Atascosa | 1 | 6.37K | 63 | by Jan 1993 – Dec 2012 |
| Webb, Ronnie G-14-238721 | Unit Petroleum Company only | Mendota, NW. (Granite Wash) | Hemphill | 1 | 6.29K | 204K | Jan 2008 – Aug 2026 |
| Webb, Arthur "A" G-14-164432 | BP America Production Company only | Canadian, West (Morrow Upper) | Hemphill | 1 | 6.28K | 447K | May 1997 – Aug 2013 |
| Webb County School Board G-4-191705 | Faulconer, Vernon E., Inc. only | Mancho Prado (L-1) | Webb | 1 | 6.05K | 383K | Nov 2002 – Jul 2012 |
| Webb County School Board G-4-271343 | Aldine Oil and Gas, LP only | Beccero Creek (Lobo Cons.) | Webb | 1 | 6.04K | 807K | Apr 2013 – Aug 2026 |
| Webb, Arthur et al "T" G-14-171832 | Mmgl Txph, LLC only | Mendota, NW. (Cherokee) | Hemphill | 1 | 5.95K | 467K | Jan 1999 – Dec 2012 |
| Webb County School Land 504 G-1-293221 | Lewis Petro Properties, Inc. only | Hawkville (Eagleford Shale) | Webb | 1 | 5.91K | 4.26M | Jun 2022 – Aug 2026 |
| Webb -B- O-1-11387 | Aminex USA, Inc. only | Somerset | Atascosa | 9 | 5.44K | 21 | by Jan 1993 – Dec 2001 |
| Webb County School Land 504 G-1-274274 | Lewis Petro Properties, Inc. only | Hawkville (Eagleford Shale) | Webb | 1 | 5.4K | 11.3M | Jan 2014 – Aug 2026 |
| Webb, et al -P- G-14-76892 | Mmgl Txph, LLC only | Mendota, NW. (Cherokee) | Hemphill | 1 | 5.39K | 475K | by Jan 1993 – Aug 2026 |
| Webb, Lois G-14-119668 | Mmgl Txph, LLC only | Mendota, NW. (Cherokee) | Roberts | 1 | 5.39K | 513K | by Jan 1993 – Dec 2009 |
| Webb, H. W. O-13-19860 | Rowland Tank Truck Company only | Sherman, East | Grayson | 1 | 5.34K | 33 | by Jan 1993 – Apr 2002 |
| Callaghan Ranch G-4-207604 | Chesapeake Operating, Inc. only | Finley-Webb (Upper Cons) | Webb | 1 | 5.23K | 468K | Feb 2005 – Jan 2010 |