| Allison G-10-259351 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 27 | 409K | Nov 2010 – Apr 2024 |
| Cole Trust Four-Porter (SA) G-13-255387 | BKV Barnett, LLC only | Newark, East (Barnett Shale) | Denton | 1 | 27 | 2.57M | Dec 2009 – Aug 2026 |
| Pohl Heirs G-2-151656 | Hunt, Wm. Herbert, Trust Est. only | Sims Tank (Frio 2740) | Lavaca | 1 | 27 | 72.3K | Dec 1994 – Jun 1996 |
| Longfellow G-10-182630 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 27 | 100K | Mar 2001 – Aug 2026 |
| Anderson Trust "A" G-5-189025 | Corsa Resources, LLC only | Nan-SU-Gail (CV Consolidated) | Freestone | 1 | 27 | 835K | May 2002 – Aug 2026 |
| State of Texas -CX- O-10-29160 | Hendon Wm E. Jr. Rev Lvng Trust only | Triple-N (Grayburg) | Andrews | 1 | 27 | 0 | Jan 2016 – Mar 2019 |
| Allison G-10-248445 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 26 | 765K | Oct 2008 – Feb 2025 |
| Semmes Trust, et al "906" G-4-187878 | Kerr-McGee Oil & Gas Onshore LLC only | Rincon (90 Vicksburg 906-4) | Starr | 1 | 26 | 218K | Feb 2002 – May 2002 |
| Haynes Mineral Trust G-4-127459 | Hilcorp Energy Company only | Munoz (Lobo) | Zapata | 1 | 26 | 432K | by Jan 1993 – Aug 2026 |
| Madeley Trust Unit O-6-14913 | Republic Energy Inc. only | Wildcat | Houston | 1 | 26 | 0 | Feb 2008 – Dec 2008 |
| West Ranch G-10-247508 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 25 | 300K | Nov 2008 – Apr 2024 |
| Longfellow G-10-194202 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 25 | 212K | Feb 2003 – Aug 2026 |
| West Ranch G-10-247313 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 25 | 125K | Nov 2008 – May 2026 |
| West Ranch G-10-247947 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 25 | 57.6K | Mar 2008 – Dec 2025 |
| Stafford G-2-150968 | Hunt, Wm. Herbert, Trust Est. only | Kubenka (2600) | Jackson | 1 | 25 | 115K | Jun 1994 – Dec 1996 |
| Rains Trust Unit G-3-206255 | Magnolia Oil & Gas Operating LLC only | Giddings (Austin Chalk-3) | Austin | 1 | 25 | 2.23M | Aug 2004 – Aug 2026 |
| Mills Trust "19" G-1-196157 | Dawson Energy, LLC only | Pandale (Canyon Sand) | Val Verde | 1 | 25 | 203K | Jun 2003 – Aug 2026 |
| Cole Trust Four G-13-187047 | BKV Barnett, LLC only | Newark, East (Barnett Shale) | Denton | 1 | 25 | 1.55M | Dec 2001 – Aug 2026 |
| Fawcett, Randee Trust "C" G-9-213879 | Upp Operating, LLC only | Sawyer (Canyon) | Sutton | 1 | 25 | 176K | Jun 2005 – Jul 2026 |
| West Ranch G-10-252124 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 24 | 933K | Aug 2008 – Apr 2024 |
| Longfellow G-10-259767 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 24 | 275K | Sep 2010 – Dec 2023 |
| Allison 4 G-10-245316 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 24 | 2.77M | Nov 2008 – Apr 2024 |
| Hill-Fawcett, Randee Trust "D" G-9-215262 | Upp Operating, LLC only | Sawyer (Canyon) | Sutton | 1 | 24 | 206K | Oct 2005 – Jul 2026 |
| Allison G-10-245314 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 24 | 87.3K | Jun 2008 – Sep 2025 |
| West Ranch South 4 G-10-249993 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 23 | 1.79M | Apr 2009 – Feb 2024 |
| Alamo National Bank Trustee G-1-122290 | Virtex Operating Company, Inc. only | Green Branch (Wilcox 2-D) | McMullen | 1 | 23 | 198K | by Jan 1993 – Apr 2003 |
| West Ranch G-10-275100 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 23 | 134K | Dec 2010 – Feb 2026 |
| Allison G-10-243236 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 23 | 909K | Aug 2008 – Mar 2024 |
| Fawcett, Randee Trust C G-9-215238 | Upp Operating, LLC only | Sawyer (Canyon) | Sutton | 1 | 22 | 137K | Nov 2005 – Jul 2026 |
| Cole Trusts 576 "A" G-13-184864 | BKV Barnett, LLC only | Newark, East (Barnett Shale) | Denton | 1 | 22 | 166K | Aug 2001 – Aug 2026 |
| West Ranch G-10-188450 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 22 | 391K | Mar 2002 – Apr 2024 |
| Lopez Mineral Trust G-4-198140 | Paleo Oil Company LLC only | Dinn Intermediate (Hinnant) | Duval | 1 | 22 | 167K | Jun 2003 – Sep 2020 |
| Peareson Trust et Al G-3-201757 | Amtex Energy, Inc. only | Duc (Frio) | Wharton | 1 | 22 | 580K | Mar 2004 – Feb 2011 |
| Longfellow G-10-178580 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 22 | 903K | Aug 2000 – Jan 2024 |
| Cartwright, L. et al Trustee G-2-134438 | Roberson, F. W. Jr. only | Hinnant (5900) | Live Oak | 1 | 22 | 122 | Aug 1993 – Aug 1993 |
| West Ranch South 4 G-10-245330 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 22 | 3.54M | Feb 2008 – Mar 2024 |
| Dalby Trust O-11-67769 | Anadarko Petroleum Corporation only | Forbes (Glorieta) | Garza | 1 | 21 | 0 | Apr 1997 – May 1997 |
| Texaco Pel-Tex Schreiner Trust G-2-122850 | Wagner Oil Company only | Sharonlee, N.E. (Sligo) | Live Oak | 1 | 21 | 10.6M | by Jan 1993 – Aug 2026 |
| West Ranch G-10-208218 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 21 | 392K | Dec 2004 – Jul 2026 |
| Anthony, James E. Trustee G-6-146925 | Fair Oil, Ltd. only | Green Fox (Travis Peak-Braden | Marion | 1 | 21 | 26.3K | Feb 1993 – Aug 2002 |
| Randee Fawcett Trust "C" G-9-206116 | Upp Operating, LLC only | Sawyer (Canyon) | Sutton | 1 | 21 | 254K | Nov 2003 – Jul 2026 |
| Amacker Trust 37 O-9-17952 | Apv McCamey LLC only | Tippett (Clear Fork Lo.) | Crockett | 1 | 21 | 0 | Oct 2011 – Aug 2012 |
| West Ranch G-10-246385 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 21 | 135K | Mar 2008 – Jul 2026 |
| Standard Trust Co. G-3-86446 | Activa Resources, LLC only | S. L. P. (Navarro) | Fayette | 1 | 21 | 80.9K | by Jan 1993 – Nov 2014 |
| West Ranch G-10-250631 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 20 | 1.8M | Apr 2009 – Mar 2024 |
| Kennedy Trust-Hughes G-6-247186 | Adamas Energy LLC only | Angie (James Lime) | Shelby | 1 | 20 | 41.2K | Oct 2008 – Aug 2026 |
| Nail, Jas. H. Jr. Trustee O-10-26259 | Parker & Parsley Development Co. only | Dixon (Strawn) | Mitchell | 1 | 20 | 236 | by Jan 1993 – Jan 1993 |
| West Ranch G-10-249730 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 20 | 3.88M | Mar 2008 – Mar 2024 |
| Longoria Mineral Trust, et Al G-4-170449 | Coastal Oil & Gas Corporation only | Thompsonville, NE. (11,300) | Duval | 1 | 20 | 99.3K | Nov 1997 – Nov 1998 |
| Cole Trust Four G-13-197633 | BKV Barnett, LLC only | Newark, East (Barnett Shale) | Denton | 1 | 20 | 1.71M | Jul 2003 – Aug 2026 |