| BMT/K&H G-4-182797 | Mountain V Texas, LLC only | Zwebb (10350) | Webb | 1 | 16.3K | 6.36M | May 2001 – Aug 2026 |
| Leslie Webb et Al G-14-244274 | Mewbourne Oil Company only | Mendota, NW. (Granite Wash) | Hemphill | 1 | 15.4K | 944K | Oct 2008 – Aug 2026 |
| Cabezon G-4-202928 | EOG Resources, Inc. only | Zwebb (10350) | Webb | 1 | 15.3K | 217K | Jul 2004 – Jan 2012 |
| Cabezon G-4-231177 | Mountain V Texas, LLC only | Zwebb (10350) | Webb | 1 | 15.2K | 730K | Sep 2007 – Jun 2026 |
| Webb, Arther et al -S- G-14-213365 | Mmgl Txph, LLC only | Mendota, NW. (Cherokee) | Hemphill | 1 | 14.9K | 745K | Dec 2005 – Jun 2025 |
| Leslie Webb et Al G-14-248764 | Mewbourne Oil Company only | Mendota, NW. (Granite Wash) | Hemphill | 1 | 14.7K | 703K | Feb 2009 – Aug 2026 |
| Webb '45' O-10-44521 | Ike Operating, LLC only | Spraberry (Trend Area) | Dawson | 1 | 14.4K | 42 | Aug 2012 – Aug 2026 |
| Webb County School Land 504 G-1-293222 | Lewis Petro Properties, Inc. only | Hawkville (Eagleford Shale) | Webb | 1 | 14.4K | 3.6M | Jun 2022 – Aug 2026 |
| Webb County School Board G-4-151286 | Faulconer, Vernon E., Inc. only | Big Cowboy (Lobo) | Webb | 1 | 14K | 996K | Aug 1994 – Aug 2012 |
| Webb Branch Unit O-3-24164 | Magnolia Oil & Gas Operating LLC only | Giddings (Buda) | Burleson | 1 | 13.7K | 6.61K | Mar 2002 – Jun 2002 |
| Webb County School Land 504 G-1-279297 | Lewis Petro Properties, Inc. only | Hawkville (Eagleford Shale) | Webb | 1 | 13.4K | 5.61M | Apr 2016 – Aug 2026 |
| Webb et al "P" G-14-239450 | Mewbourne Oil Company only | Mendota, NW. (Granite Wash) | Hemphill | 1 | 13.4K | 710K | Jun 2008 – Aug 2026 |
| Webb 194 G-14-222939 | Bce-Mach III LLC only | Mendota, NW. (Granite Wash) | Hemphill | 1 | 13.3K | 1.06M | Sep 2006 – Aug 2026 |
| Webb "A" G-14-253166 | Unit Petroleum Company only | Mendota, NW. (Granite Wash) | Hemphill | 1 | 13.2K | 595K | Jul 2009 – Aug 2026 |
| Webb County School Land 504 G-1-279102 | Lewis Petro Properties, Inc. only | Hawkville (Eagleford Shale) | Webb | 1 | 13.2K | 4.03M | Apr 2016 – Aug 2026 |
| Gonzales-Webb O-1-12824 | Texakoma Oil & Gas Corporation only | Smiley, SE (Austin Chalk) | Gonzales | 1 | 12.9K | 6.72K | by Jan 1993 – Mar 1994 |
| Webb, Max L. O-1-2927 | Ams Energy Solutions LLP only | Salt Flat | Guadalupe | 7 | 12.7K | 20 | by Jan 1993 – May 2023 |
| Thomasma, Ray J. "B" G-4-223916 | Hilcorp Energy Company only | Zwebb (10350) | Webb | 1 | 12.7K | 2.06M | May 2004 – Aug 2026 |
| Webb, E. D. O-11-65840 | Hilcorp Energy Company only | Plains, Southwest (Wolfcamp) | Yoakum | 2 | 12.5K | 1.55K | by Jan 1993 – Feb 2010 |
| A. Webb Estate G-14-230352 | Unit Petroleum Company only | Mendota, NW. (Granite Wash) | Hemphill | 1 | 12.3K | 540K | Aug 2007 – Aug 2026 |
| BMT/K&H "F" G-4-178051 | EOG Resources, Inc. only | Zwebb (10350) | Webb | 1 | 12.2K | 488K | Jul 2000 – Aug 2010 |
| Webb "T" G-14-250871 | Mmgl Txph, LLC only | Mendota, NW. (Granite Wash) | Hemphill | 1 | 12.2K | 451K | Mar 2009 – Jun 2017 |
| BMT/K&H G-4-180279 | Mountain V Texas, LLC only | Zwebb (10350) | Webb | 1 | 12K | 2.48M | Dec 2000 – Aug 2026 |
| McGrath G-4-186023 | Killam Oil Co., Ltd. only | Zwebb (10350) | Webb | 1 | 11.9K | 2.83M | Oct 2001 – Aug 2026 |
| BMT/K&H G-4-178706 | Mountain V Texas, LLC only | Zwebb (10350) | Webb | 1 | 11.7K | 2.64M | Aug 2000 – Apr 2015 |
| Slator Ranch C G-4-174219 | Mountain V Texas, LLC only | Zwebb (10350) | Zapata | 1 | 11.6K | 1.21M | Aug 1999 – Aug 2026 |
| Webb, Lois G-14-174993 | Mmgl Txph, LLC only | Mendota, NW. (Granite Wash) | Roberts | 1 | 11.5K | 1.01M | Sep 1999 – Aug 2026 |
| Vaquillas-Borrego G-4-193820 | Killam Oil Co., Ltd. only | Zwebb (10350) | Webb | 1 | 11.4K | 783K | Feb 2003 – Jul 2015 |
| Arthur Webb et al "S" G-14-228619 | Mewbourne Oil Company only | Mendota, NW. (Granite Wash) | Hemphill | 1 | 11.4K | 454K | Jun 2007 – Aug 2026 |
| Webb County School Board G-4-91576 | Proline Energy Resources Inc only | Mancho Prado (L-1) | Webb | 1 | 11.4K | 1.5M | by Jan 1993 – Jan 1999 |
| Webb, Arthur et al "S" G-14-232433 | Mewbourne Oil Company only | Mendota, NW. (Granite Wash) | Hemphill | 1 | 11.3K | 414K | Nov 2007 – Aug 2026 |
| Webb County School Land 504 G-1-288115 | Lewis Petro Properties, Inc. only | Hawkville (Eagleford Shale) | Webb | 1 | 11.2K | 4.45M | Jan 2021 – Aug 2026 |
| BMT/K&H G-4-188141 | Mountain V Texas, LLC only | Zwebb (10350) | Webb | 1 | 10.9K | 2.82M | Mar 2002 – Aug 2026 |
| Leslie Webb et al "R" G-14-235260 | Mewbourne Oil Company only | Mendota, NW. (Granite Wash) | Hemphill | 1 | 10.9K | 302K | Dec 2007 – Aug 2026 |
| Webb, C. W. O-3-15445 | D.J. Oilfield Salvage Inc. only | Giddings (Austin Chalk-3) | Fayette | 1 | 10.9K | 6.92K | by Jan 1993 – Jul 1997 |
| Webb County School Land 504 G-1-279087 | Lewis Petro Properties, Inc. only | Hawkville (Eagleford Shale) | Webb | 1 | 10.8K | 4.59M | Apr 2016 – Aug 2026 |
| Cabezon G-4-246989 | Mountain V Texas, LLC only | Zwebb (10350) | Webb | 1 | 10.8K | 461K | Jan 2009 – Jun 2026 |
| Slator Ranch "A" G-4-177401 | Mountain V Texas, LLC only | Zwebb (10350) | Zapata | 1 | 10.6K | 954K | May 2000 – May 2025 |
| Webber "444" O-11-69515 | Walsh Petroleum, Inc. only | Brahaney, East (San Andres) | Yoakum | 1 | 10.2K | 0 | Mar 2010 – Oct 2020 |
| BMT/K&H G-4-180616 | Mountain V Texas, LLC only | Zwebb (10350) | Webb | 1 | 10.2K | 2.19M | Jan 2001 – Nov 2011 |
| Slator Ranch "B" G-4-189375 | Mountain V Texas, LLC only | Zwebb (10350) | Zapata | 1 | 10.1K | 1.02M | Apr 2002 – Aug 2026 |
| Webb, J. L. O-13-20985 | Bridwell Oil Co. only | Smyrna (Atoka) | Montague | 3 | 10.1K | 349K | by Jan 1993 – Aug 2026 |
| Webb OU O-6-16149 | Sabine Energy Inc. only | Henderson (Rusk Co. Pettit) | Rusk | 1 | 9.83K | 55K | Sep 2025 – Aug 2026 |
| Webb "A" O-11-62520 | E.G. Operating only | Brahaney (Devonian) | Yoakum | 1 | 9.77K | 3.75K | by Jan 1993 – Jul 1996 |
| Webb G-14-270787 | Unit Petroleum Company only | Mendota, NW. (Granite Wash) | Hemphill | 1 | 9.66K | 421K | Jun 2010 – Aug 2026 |
| McGrath "A" G-4-203559 | Mountain V Texas, LLC only | Zwebb (10350) | Webb | 1 | 9.57K | 1.46M | Jun 2004 – Aug 2026 |
| Webb County School Board G-4-109792 | Faulconer, Vernon E., Inc. only | Mancho Prado (L-1) | Webb | 1 | 9.36K | 1.72M | by Jan 1993 – May 2013 |
| Webb County School Land 504 G-1-279145 | Lewis Petro Properties, Inc. only | Hawkville (Eagleford Shale) | Webb | 1 | 9.09K | 4.13M | Apr 2016 – Aug 2026 |
| Webb 194 G-14-232597 | Mmgl Txph, LLC only | Mendota, NW. (Granite Wash) | Hemphill | 1 | 8.99K | 891K | Sep 2007 – Aug 2026 |
| Webb, G. G-14-227391 | Unit Petroleum Company only | Mendota, NW. (Cherokee) | Hemphill | 1 | 8.99K | 796K | Mar 2007 – Nov 2022 |