| Allison G-10-274949 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 31 | 355K | Sep 2010 – Apr 2024 |
| Allison G-10-229180 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 31 | 206K | Apr 2007 – May 2026 |
| West Ranch G-10-241789 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 31 | 163K | Jun 2008 – Aug 2026 |
| West Ranch G-10-216883 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 31 | 506K | Apr 2006 – Aug 2026 |
| Hein Trust G-4-146451 | Hilcorp Energy Company only | La Perla (Lobo Cons.) | Webb | 1 | 31 | 267K | Aug 1993 – Dec 1997 |
| Henderson Trust "EE" G-9-151477 | Enron Oil & Gas Company only | Ozona, SW. (Strawn) | Crockett | 1 | 31 | 34.3K | Sep 1994 – Oct 1994 |
| Haynes Mineral Trust G-4-122838 | Hilcorp Energy Company only | Munoz (Lobo) | Zapata | 1 | 30 | 359K | by Jan 1993 – Aug 2026 |
| Allison 4 G-10-240085 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 30 | 4.98M | May 2008 – Apr 2024 |
| Hein Trust G-4-154234 | Hilcorp Energy Company only | La Perla (Lobo Cons.) | Webb | 1 | 30 | 54.9K | Apr 1995 – Jun 2002 |
| Lawrence Trust Unit G-13-291800 | Jetta Operating Company, Inc. only | Big Mineral Creek (Viola) | Grayson | 1 | 30 | 103K | Oct 2021 – Jul 2026 |
| Goff-Goelzer Gas Unit G-2-150303 | Hunt, Wm. Herbert, Trust Est. only | Topsy (3900) | Jackson | 1 | 30 | 441K | Jul 1994 – Jul 1997 |
| Allison 4 G-10-239158 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 30 | 4.3M | Mar 2008 – Apr 2024 |
| West Ranch G-10-249291 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 30 | 360K | Jan 2009 – Jan 2025 |
| Allison G-10-158305 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 30 | 181K | Apr 1996 – Feb 2002 |
| Allison G-10-249679 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 30 | 128K | Feb 2009 – Aug 2026 |
| West Ranch G-10-249290 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 30 | 154K | Jun 2008 – Aug 2026 |
| Benton Trust G-3-176307 | Patterson Petroleum LP only | Rosenburg (Frio 5340) | Fort Bend | 1 | 30 | 274K | Dec 1999 – Dec 2003 |
| Frost Trust G-4-153269 | Austin Resources Corporation only | Shockacon (Wilcox 6700) | Webb | 1 | 29 | 5.89K | Jun 1994 – Aug 1994 |
| McLane Texas Trust East G-3-154106 | D-Mil Production, Inc. only | Garwood (Frio 3200) | Colorado | 1 | 29 | 90.6K | Mar 1995 – Dec 1999 |
| Rust Estate 2 G-6-101579 | Brookston Energy, Inc. only | Oak Hill (Cotton Valley) | Rusk | 1 | 29 | 401K | by Jan 1993 – Aug 2026 |
| Watkins Trust (Harding) G-13-240511 | Grand Operating, Inc. only | Newark, East (Barnett Shale) | Tarrant | 1 | 29 | 1.99M | May 2007 – Apr 2015 |
| West Ranch G-10-239309 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 28 | 2.21M | Feb 2008 – Feb 2024 |
| West State G-10-201766 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 28 | 110K | Mar 2004 – Apr 2025 |
| West Ranch G-10-229132 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 28 | 164K | Jul 2007 – Jan 2026 |
| West Ranch G-10-230564 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 28 | 2.36M | Jun 2007 – Mar 2024 |
| Hradilek G-2-152265 | Hunt, Wm. Herbert, Trust Est. only | Pine Tree (Frio 3300) | Lavaca | 1 | 28 | 178K | Nov 1994 – Oct 1996 |
| West Ranch G-10-256633 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 28 | 844K | Feb 2010 – Apr 2023 |
| Allison G-10-224863 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 28 | 290K | Nov 2006 – Jul 2026 |
| Haynes Mineral Trust G-4-208611 | Hilcorp Energy Company only | Haynes (Middle Wilcox Cons.) | Zapata | 1 | 28 | 860K | Feb 2005 – Aug 2026 |
| Marrs McLean Trust G-4-166952 | Columbus Energy, LLC only | Thompsonville, NE. (12500 FB-C) | Jim Hogg | 1 | 28 | 1.16M | Feb 1998 – Jun 2018 |
| West Ranch G-10-239864 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 28 | 252K | Apr 2008 – Aug 2026 |
| West State G-10-230777 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 28 | 2.2M | Jul 2007 – Apr 2024 |
| Bruni Mineral Trust "A" G-4-80717 | Chevron U. S. A. Inc. only | Juanita (Lobo) | Webb | 1 | 27 | 54K | Mar 1993 – Jul 1994 |
| Anderson Trust "A" G-5-189025 | Corsa Resources, LLC only | Nan-SU-Gail (CV Consolidated) | Freestone | 1 | 27 | 835K | May 2002 – Aug 2026 |
| 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 |
| Allison G-10-259351 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 27 | 409K | Nov 2010 – Apr 2024 |
| Fawcett, Randee Trust "C" G-9-213761 | Upp Operating, LLC only | Sawyer (Canyon) | Sutton | 1 | 27 | 136K | Jun 2005 – Jul 2026 |
| Longfellow G-10-182630 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 27 | 100K | Mar 2001 – 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 |
| Haynes Mineral Trust G-4-127459 | Hilcorp Energy Company only | Munoz (Lobo) | Zapata | 1 | 26 | 432K | by Jan 1993 – Aug 2026 |
| 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 |
| Allison G-10-248445 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 26 | 765K | Oct 2008 – Feb 2025 |
| West Ranch G-10-247313 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 25 | 125K | Nov 2008 – May 2026 |
| Longfellow G-10-194202 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 25 | 212K | Feb 2003 – Aug 2026 |
| West Ranch G-10-247508 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 25 | 300K | Nov 2008 – Apr 2024 |
| 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 |
| 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 |
| Stafford G-2-150968 | Hunt, Wm. Herbert, Trust Est. only | Kubenka (2600) | Jackson | 1 | 25 | 115K | Jun 1994 – Dec 1996 |
| West Ranch G-10-247947 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 25 | 57.6K | Mar 2008 – Dec 2025 |