| Webb, Arthur et al -S- G-14-158565 | Mmgl Txph, LLC only | Mendota, NW. (Cherokee) | Hemphill | 1 | 24.8K | 2.28M | Apr 1996 – Jan 2024 |
| Webb, Leslie et al "R" G-14-240873 | Mewbourne Oil Company only | Mendota, NW. (Granite Wash) | Hemphill | 1 | 24.7K | 1.45M | May 2008 – Aug 2026 |
| Cabezon G-4-188849 | Mountain V Texas, LLC only | Zwebb (10350) | Webb | 1 | 24.6K | 665K | Apr 2002 – Jun 2026 |
| Webb, Arthur et al "S" G-14-228441 | Mewbourne Oil Company only | Mendota, NW. (Granite Wash) | Hemphill | 1 | 24.5K | 1.22M | Apr 2007 – Aug 2026 |
| Arthur Webb et al "S" G-14-249699 | Mewbourne Oil Company only | Mendota, NW. (Granite Wash) | Hemphill | 1 | 24.4K | 1.15M | Mar 2009 – Aug 2026 |
| Cabezon G-4-246190 | Mountain V Texas, LLC only | Zwebb (10350) | Webb | 1 | 24.2K | 485K | Oct 2008 – Jun 2026 |
| Webb D Unit G-13-268387 | BKV Barnett, LLC only | Newark, East (Barnett Shale) | Cooke | 1 | 24.2K | 1.12M | Dec 2012 – Aug 2026 |
| BMT/K&H G-4-185467 | Mountain V Texas, LLC only | Zwebb (10350) | Webb | 1 | 23.7K | 3.65M | Aug 2001 – Aug 2026 |
| Webb, Arthur et al "S" G-14-225241 | Mewbourne Oil Company only | Mendota, NW. (Granite Wash) | Hemphill | 1 | 23.3K | 1.54M | Feb 2007 – Aug 2026 |
| Webb County School Board G-4-87366 | Proline Energy Resources Inc only | Mancho Prado (L-1) | Webb | 1 | 22.9K | 1.41M | by Jan 1993 – Dec 2024 |
| Webb-A- O-1-11365 | Petrosaurus, Inc. only | Somerset | Atascosa | 23 | 22.9K | 21 | by Jan 1993 – Aug 2021 |
| Arthur Webb et al "T" G-14-258050 | Mewbourne Oil Company only | Mendota, NW. (Granite Wash) | Hemphill | 1 | 22.6K | 1.17M | Mar 2010 – Aug 2026 |
| Vaquillas-Borrego G-4-187514 | Killam Oil Co., Ltd. only | Zwebb (10350) | Webb | 1 | 22.6K | 3.84M | Feb 2002 – Jan 2016 |
| Webb O-11-66249 | Nordstrand Engineering, Inc. only | Brahaney | Yoakum | 1 | 22.4K | 1.66K | by Jan 1993 – Oct 2017 |
| Webb C Unit G-13-268386 | BKV Barnett, LLC only | Newark, East (Barnett Shale) | Cooke | 1 | 22.3K | 1.15M | Dec 2012 – Aug 2026 |
| McGrath G-4-182944 | Killam Oil Co., Ltd. only | Zwebb (10350) | Webb | 1 | 22K | 7.01M | Apr 2001 – Aug 2026 |
| State Tract 838 G-4-204361 | Mountain V Texas, LLC only | Zwebb (10350) | Webb | 1 | 21.8K | 1.35M | Aug 2004 – Aug 2026 |
| Vaquillas-Borrego G-4-219603 | Killam Oil Co., Ltd. only | Zwebb (10350) | Webb | 1 | 21.7K | 931K | May 2006 – Jan 2016 |
| Webb, E.E. O-8-13371 | Safari Resources, LLC only | Higgs (Mississippian) | Throckmorton | 1 | 21.5K | 1.44K | by Jan 1993 – Jul 2026 |
| Webb G-14-254206 | Unit Petroleum Company only | Mendota, NW. (Granite Wash) | Hemphill | 1 | 21.5K | 981K | Sep 2009 – Aug 2026 |
| Vaquillas-Borrego G-4-191511 | Killam Oil Co., Ltd. only | Zwebb (10350) | Webb | 1 | 21.1K | 3.19M | Sep 2002 – Aug 2016 |
| Webb O-3-26540 | Burk Royalty Co., Ltd. only | Fort Trinidad, East (Buda) | Madison | 1 | 21K | 71K | Jul 2013 – Jul 2021 |
| McGrath G-4-200375 | Mountain V Texas, LLC only | Zwebb (10350) | Webb | 1 | 20.7K | 2.39M | Mar 2004 – Jul 2026 |
| Slator Ranch "B" G-4-175528 | Mountain V Texas, LLC only | Zwebb (10350) | Zapata | 1 | 20.4K | 1.84M | Jan 2000 – Aug 2026 |
| Webb "445" O-11-69661 | Walsh Petroleum, Inc. only | Brahaney, East (San Andres) | Yoakum | 2 | 19.8K | 0 | Mar 2011 – Oct 2020 |
| Webb, Leslie et al "R" G-14-234094 | Mewbourne Oil Company only | Mendota, NW. (Granite Wash) | Hemphill | 1 | 19.7K | 1.49M | Dec 2007 – Aug 2026 |
| McGrath G-4-183853 | Mountain V Texas, LLC only | Zwebb (10350) | Zapata | 1 | 19.5K | 3.61M | Jun 2001 – Aug 2026 |
| Webb O-4-11490 | Cox & Perkins Exploration, Inc. only | Webb (5500) | San Patricio | 1 | 19.3K | 19.6K | by Jan 1993 – Sep 1995 |
| BMT/K&H G-4-184520 | Mountain V Texas, LLC only | Zwebb (10350) | Webb | 1 | 19K | 4.25M | Jul 2001 – Aug 2026 |
| Mc Grath G-4-189425 | Mountain V Texas, LLC only | Zwebb (10350) | Zapata | 1 | 18.8K | 3.86M | Jun 2002 – Aug 2026 |
| Webb C Unit G-13-268388 | BKV Barnett, LLC only | Newark, East (Barnett Shale) | Cooke | 1 | 18.7K | 577K | Dec 2012 – Aug 2026 |
| Webb -A- O-1-6658 | Seeker Oil Company, Incorporated only | Benton City S, (Anacacho) | Atascosa | 3 | 18.7K | 21 | by Jan 1993 – Aug 2026 |
| Webb, Arthur et al -S- G-14-213364 | Mmgl Txph, LLC only | Mendota, NW. (Cherokee) | Hemphill | 1 | 18.3K | 872K | Dec 2005 – Aug 2026 |
| Callaghan Ranch G-4-210183 | Hilcorp Energy Company only | Finley-Webb (Lobo Cons) | Webb | 1 | 18.2K | 1.09M | Apr 2005 – Oct 2012 |
| Webb, Leslie et Al G-14-266479 | Mmgl Txph, LLC only | Mendota, NW. (Granite Wash) | Hemphill | 1 | 18.2K | 1.16M | Sep 2012 – Aug 2026 |
| Webb, Leslie et al "R" G-14-224696 | Mewbourne Oil Company only | Mendota, NW. (Granite Wash) | Hemphill | 1 | 18.1K | 1M | Jan 2007 – Aug 2026 |
| Webb County School Board G-4-270826 | Aldine Oil and Gas, LP only | Beccero Creek (Lobo Cons.) | Webb | 1 | 18K | 1.66M | Aug 2013 – Aug 2026 |
| BMT/K&H G-4-178588 | Mountain V Texas, LLC only | Zwebb (10350) | Webb | 1 | 17.9K | 4M | Aug 2000 – Aug 2026 |
| Webb County School Land 504 G-1-279363 | Lewis Petro Properties, Inc. only | Hawkville (Eagleford Shale) | Webb | 1 | 17.9K | 5.59M | Apr 2016 – Aug 2026 |
| McGrath G-4-191101 | Mountain V Texas, LLC only | Zwebb (10350) | Zapata | 1 | 17.8K | 4M | Jul 2002 – Aug 2026 |
| Webb O-3-25071 | Merica Oil Operating Company LLC only | Giddings (Austin Chalk-3) | Bastrop | 2 | 17.7K | 0 | Sep 2007 – Nov 2022 |
| Webb G-6-151469 | Sydri Operating, LLC only | White Oak (Cotton Valley Sand) | Upshur | 1 | 17.3K | 1.06M | Jul 1994 – Oct 2014 |
| Leslie Webb et Al G-14-252964 | Mewbourne Oil Company only | Mendota, NW. (Granite Wash) | Hemphill | 1 | 17.2K | 780K | Jul 2009 – Aug 2026 |
| Webb, C. T. O-8-1504 | Hoffmann Oil Company only | Eastland County Regular | Eastland | 5 | 17.1K | 139 | by Jan 1993 – Aug 2026 |
| Webb "A" G-14-258644 | Unit Petroleum Company only | Mendota, NW. (Granite Wash) | Hemphill | 1 | 17.1K | 988K | Feb 2010 – Aug 2026 |
| BMT/K&H G-4-179473 | Mountain V Texas, LLC only | Zwebb (10350) | Webb | 1 | 17K | 2.25M | Oct 2000 – Oct 2023 |
| Webb County School Land 504 G-1-274956 | Lewis Petro Properties, Inc. only | Hawkville (Eagleford Shale) | Webb | 1 | 17K | 6.57M | May 2014 – Aug 2026 |
| Slator Ranch B G-4-174612 | Mountain V Texas, LLC only | Zwebb (10350) | Zapata | 1 | 16.8K | 2.11M | Sep 1999 – Aug 2026 |
| Webb "A" O-11-68740 | Riley Permian Operating Co, LLC only | Brahaney (Devonian) | Yoakum | 1 | 16.4K | 8.29K | Jul 2004 – Sep 2016 |
| BMT/K&H G-4-179827 | Mountain V Texas, LLC only | Zwebb (10350) | Webb | 1 | 16.3K | 3.35M | Oct 2000 – Aug 2026 |