| A. Webb Estate G-14-263947 | Unit Petroleum Company only | Mendota, NW. (Granite Wash) | Hemphill | 1 | 195K | 3.93M | Dec 2010 – Apr 2026 |
| A. Webb Estate G-14-267592 | Unit Petroleum Company only | Mendota, NW. (Granite Wash) | Hemphill | 1 | 93.5K | 4.21M | Jan 2012 – Apr 2026 |
| Vaquillas-Borrego G-4-189391 | Killam Oil Co., Ltd. only | Zwebb (10350) | Webb | 1 | 92K | 3.44M | May 2002 – Aug 2016 |
| Webb G-14-267245 | Unit Petroleum Company only | Mendota, NW. (Granite Wash) | Hemphill | 1 | 83.9K | 2.16M | Oct 2011 – Apr 2026 |
| A. Webb Estate G-14-266539 | Unit Petroleum Company only | Mendota, NW. (Granite Wash) | Hemphill | 1 | 77.5K | 1.14M | Jul 2011 – Apr 2026 |
| Arthur Webb -B- G-14-265033 | Mewbourne Oil Company only | Mendota, NW. (Granite Wash) | Hemphill | 1 | 75.2K | 1.73M | Nov 2011 – Apr 2026 |
| Webb "A" G-14-262193 | Unit Petroleum Company only | Mendota, NW. (Granite Wash) | Hemphill | 1 | 71.9K | 1.77M | Oct 2010 – Apr 2026 |
| Leslie Webb et Al G-14-255696 | Mewbourne Oil Company only | Mendota, NW. (Granite Wash) | Hemphill | 1 | 68.4K | 2.89M | Feb 2010 – Apr 2026 |
| Slator Ranch "A" G-4-175017 | Mountain V Texas, LLC only | Zwebb (10350) | Webb | 1 | 64.7K | 3.15M | Nov 1999 – Apr 2026 |
| Slator Ranch "A" G-4-175486 | Mountain V Texas, LLC only | Zwebb (10350) | Webb | 1 | 62.3K | 4.16M | Dec 1999 – Apr 2026 |
| Webb -A- G-14-262663 | Mewbourne Oil Company only | Mendota, NW. (Granite Wash) | Hemphill | 1 | 59.3K | 1.66M | Jun 2011 – Apr 2026 |
| Webb a Unit G-13-268597 | EOG Resources, Inc. only | Newark, East (Barnett Shale) | Cooke | 1 | 56.9K | 1.27M | Jun 2012 – Apr 2026 |
| Slator Ranch "A" G-4-173763 | Mountain V Texas, LLC only | Zwebb (10350) | Zapata | 1 | 56.7K | 4.17M | Jul 1999 – Apr 2026 |
| BMT/K&H "B" G-4-178052 | Mountain V Texas, LLC only | Zwebb (10350) | Webb | 1 | 52.3K | 3.8M | Jul 2000 – Apr 2026 |
| Webb G-14-266625 | Unit Petroleum Company only | Mendota, NW. (Granite Wash) | Hemphill | 1 | 51.3K | 1.96M | Aug 2011 – Apr 2026 |
| Arthur Webb et al "S" G-14-260345 | Mewbourne Oil Company only | Mendota, NW. (Granite Wash) | Hemphill | 1 | 50.8K | 1.12M | Sep 2010 – Apr 2026 |
| Leslie Webb et Al G-14-255788 | Mewbourne Oil Company only | Mendota, NW. (Granite Wash) | Hemphill | 1 | 50.4K | 2.14M | Feb 2010 – Apr 2026 |
| Vaquillas-Borrego G-4-188871 | Killam Oil Co., Ltd. only | Zwebb (10350) | Webb | 1 | 49.9K | 3.3M | May 2002 – Aug 2016 |
| Webb a Unit G-13-268594 | EOG Resources, Inc. only | Newark, East (Barnett Shale) | Cooke | 1 | 49.3K | 1.38M | Jun 2012 – Apr 2026 |
| BMT/K&H G-4-183460 | Mountain V Texas, LLC only | Zwebb (10350) | Webb | 1 | 49.2K | 3.52M | May 2001 – Aug 2010 |
| BMT/K & H "B" G-4-176451 | Mountain V Texas, LLC only | Zwebb (10350) | Webb | 1 | 48.4K | 5.27M | Mar 2000 – Apr 2026 |
| Webb, Leslie et al 'R' G-14-269525 | Mewbourne Oil Company only | Mendota, NW. (Granite Wash) | Hemphill | 1 | 46.8K | 1.47M | Apr 2013 – Apr 2026 |
| Webb, L. A. G-4-97314 | Amerril Energy LLC only | Flour Bluff (Deep Consol.) | Nueces | 1 | 45.7K | 1.68M | Jan 1993 – Dec 2009 |
| Webb G-3-155937 | Jamex, Inc. only | Chesterville, N. (Pack) | Colorado | 1 | 44.1K | 4.53M | Oct 1995 – Mar 2026 |
| Gray-Webb (AW) G-6-286031 | Sabine Energy Inc. only | Oak Hill (Cotton Valley) | Rusk | 1 | 43.9K | 7.65M | Oct 2018 – Apr 2026 |
| Webb G-14-259769 | Unit Petroleum Company only | Mendota, NW. (Granite Wash) | Hemphill | 1 | 43.4K | 1.1M | Oct 2010 – Dec 2025 |
| Webb, Lois G-14-160751 | Mmgl Txph, LLC only | Mendota, NW. (Granite Wash) | Roberts | 1 | 42K | 2.41M | Sep 1996 – Apr 2026 |
| Webb B Unit G-13-269678 | EOG Resources, Inc. only | Newark, East (Barnett Shale) | Cooke | 1 | 40.9K | 1.16M | Jun 2012 – Apr 2026 |
| Webb -A- G-14-267304 | Mewbourne Oil Company only | Mendota, NW. (Granite Wash) | Hemphill | 1 | 39.5K | 642K | Apr 2012 – Apr 2026 |
| BMT/K&H "B" G-4-183475 | Mountain V Texas, LLC only | Zwebb (10350) | Webb | 1 | 39.2K | 2.73M | Jun 2001 – Apr 2026 |
| Webb B Unit G-13-268563 | EOG Resources, Inc. only | Newark, East (Barnett Shale) | Cooke | 1 | 38.9K | 1.32M | Jun 2012 – Apr 2026 |
| BMT/K&H G-4-181384 | Mountain V Texas, LLC only | Zwebb (10350) | Webb | 1 | 37.2K | 6.31M | Feb 2001 – Apr 2026 |
| Webb G-3-160565 | Jamex, Inc. only | Chesterville, N. (Pack) | Colorado | 1 | 35.1K | 4.87M | Sep 1996 – Mar 2026 |
| Webb -A- G-14-266621 | Mewbourne Oil Company only | Mendota, NW. (Granite Wash) | Hemphill | 1 | 34.9K | 850K | Dec 2011 – Apr 2026 |
| Webb, Leslie et al "R" G-14-232397 | Mewbourne Oil Company only | Mendota, NW. (Granite Wash) | Hemphill | 1 | 34.3K | 1.41M | Oct 2007 – Apr 2026 |
| Webb 187 G-14-270266 | Unit Petroleum Company only | Mendota, NW. (Granite Wash) | Hemphill | 1 | 34.1K | 610K | Sep 2012 – Apr 2026 |
| BMT/K&H G-4-177527 | Mountain V Texas, LLC only | Zwebb (10350) | Webb | 1 | 33.7K | 8.56M | May 2000 – Apr 2026 |
| Cabezon G-4-245457 | Mountain V Texas, LLC only | Zwebb (10350) | Webb | 1 | 33.5K | 1.46M | Nov 2007 – Apr 2026 |
| Webb 187 G-14-267516 | Unit Petroleum Company only | Mendota, NW. (Granite Wash) | Hemphill | 1 | 33.5K | 1.64M | Mar 2012 – Apr 2026 |
| Thomasma, Ray J. G-4-198842 | Hilcorp Energy Company only | Zwebb (10350) | Zapata | 1 | 32.7K | 4.08M | Nov 2003 – Apr 2026 |
| Arthur Webb et al "S" G-14-242166 | Mewbourne Oil Company only | Mendota, NW. (Granite Wash) | Hemphill | 1 | 32K | 1.86M | Aug 2008 – Apr 2026 |
| Arthur Webb -B- G-14-272249 | Mewbourne Oil Company only | Mendota, NW. (Granite Wash) | Hemphill | 1 | 31.2K | 720K | May 2013 – Apr 2026 |
| Arthur Webb et al "T" G-14-250877 | Mewbourne Oil Company only | Mendota, NW. (Granite Wash) | Hemphill | 1 | 31.2K | 955K | Mar 2009 – Apr 2026 |
| Thomasma, Ray J. G-4-197050 | Hilcorp Energy Company only | Zwebb (10350) | Zapata | 1 | 31K | 4.87M | Sep 2003 – Apr 2026 |
| Webb 'A' G-14-277998 | Unit Petroleum Company only | Mendota, NW. (Granite Wash) | Hemphill | 1 | 30.5K | 1.16M | Jan 2015 – Apr 2026 |
| Cabezon G-4-189382 | Mountain V Texas, LLC only | Zwebb (10350) | Webb | 1 | 30K | 810K | Feb 2002 – Apr 2026 |
| Arthur Webb et al "S" G-14-260347 | Mewbourne Oil Company only | Mendota, NW. (Granite Wash) | Hemphill | 1 | 28.1K | 790K | Oct 2010 – Apr 2026 |
| Cabezon G-4-237464 | Mountain V Texas, LLC only | Zwebb (10350) | Webb | 1 | 27.8K | 656K | Apr 2008 – Apr 2026 |
| Webb, Arthur et al "T" G-14-262661 | Mewbourne Oil Company only | Mendota, NW. (Granite Wash) | Hemphill | 1 | 27.3K | 788K | Jun 2011 – May 2022 |
| Webb, Leslie et Al G-14-241156 | Mewbourne Oil Company only | Mendota, NW. (Granite Wash) | Hemphill | 1 | 27K | 1.49M | Jul 2008 – Apr 2026 |