| Martin Trust O-8-26628 | Midland Oil and Gas, Inc. only | Frankirk (Ellenburger) | Stonewall | 1 | 1.83K | 784 | by Jan 1993 – Dec 1993 |
| Iowa Realty Trust "A" O-10-24049 | N & O Oil Co. only | Pecos Valley (High Gravity) | Pecos | 8 | 1.82K | 8.04K | by Jan 1993 – Aug 1998 |
| Longfellow G-10-186277 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 1.82K | 8.11M | Nov 2001 – Feb 2024 |
| Begert Trust 5 G-14-243107 | Bce-Mach II LLC only | Begert (10,200) | Hemphill | 1 | 1.81K | 341K | Aug 2008 – Aug 2026 |
| West Ranch G-10-219549 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 1.8K | 1.56M | Jul 2006 – Aug 2026 |
| Broussard Trust G-3-172180 | Milestone Operating, Inc. only | Lovells Lake (Marg. 7500) | Jefferson | 1 | 1.77K | 1.12M | Jan 1999 – Sep 2009 |
| West State G-10-201356 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 1.77K | 494K | Feb 2004 – Oct 2025 |
| Strange, Douglas D. O-13-20689 | Strange, Joyce Marital Trust only | Archer County Regular | Archer | 1 | 1.76K | 21 | by Jan 1993 – Sep 2006 |
| West Ranch G-10-248471 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 1.76K | 443K | Jul 2008 – Dec 2025 |
| Boston Texas Land & Trust G-4-181149 | Merit Energy Company only | Jeffress, NE. (T, Lo.-Fb,a) | Hidalgo | 1 | 1.75K | 257K | Jan 2001 – Jan 2005 |
| Bruni Mineral Trust "C" G-4-212850 | Hilcorp Energy Company only | Bashara-Hereford (7300) | Webb | 1 | 1.75K | 441K | Apr 2005 – Aug 2026 |
| West Ranch 5 G-10-170423 | Sandridge Energy, Inc. only | Pinon (Overthrust) | Pecos | 1 | 1.74K | 24.3K | Aug 1998 – Aug 2000 |
| C-Bruni Mineral Trust G-4-66600 | Chevron U. S. A. Inc. only | Laredo (Lobo) | Webb | 1 | 1.7K | 235K | by Jan 1993 – Feb 1997 |
| First National Trust G-14-140234 | Courson Oil & Gas, Inc. only | Ellis Ranch (Cleveland, UP) | Ochiltree | 1 | 1.7K | 611K | by Jan 1993 – Jul 2012 |
| Longfellow 170 G-10-205281 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 1.69K | 1.86K | Sep 2006 – Feb 2016 |
| Stewart Trust G-4-270879 | Lewis Petro Properties, Inc. only | Owen (Olmos) | Webb | 1 | 1.69K | 1.93M | Feb 2013 – Aug 2026 |
| Martin Trust G-14-215354 | Forest Oil Corporation only | Clark Martin (Granite Wash) | Roberts | 1 | 1.69K | 128K | Feb 2006 – Apr 2013 |
| Cameron Minerals Trust Gas Unit G-6-138698 | Diversified Production LLC only | Allentown (Glen Rose, Upper) | Angelina | 1 | 1.68K | 1.2M | by Jan 1993 – Mar 2024 |
| Bragg Trust G-5-163733 | Encana Oil & Gas(usa) Inc. only | Stewards Mill, NE. (CVL) | Freestone | 1 | 1.68K | 508K | Jun 1997 – Dec 1999 |
| North Hayter Trust A G-6-219618 | Texian Operating Company, LLC only | Douglass, W. (Travis Peak) | Nacogdoches | 1 | 1.67K | 782K | Mar 2006 – Aug 2026 |
| Nelson, C. S. Trust et Al G-2-97865 | Samson Resources Company only | Limes (Wilcox 9900) | Live Oak | 1 | 1.67K | 79.1K | by Jan 1993 – Sep 1993 |
| Mitchell 9 G-9-205131 | Hilcorp Energy Company only | Pakenham (Thrusted) | Terrell | 1 | 1.67K | 174K | Mar 2004 – Aug 2026 |
| USA Trust G-13-282500 | BKV North Texas, LLC only | Newark, East (Barnett Shale) | Denton | 1 | 1.67K | 283K | Mar 2017 – Aug 2026 |
| North Hayter Trust G-6-213960 | Texian Operating Company, LLC only | Douglass, W. (Travis Peak) | Nacogdoches | 1 | 1.66K | 1.62M | Jun 2005 – Aug 2026 |
| T. P. Land & Trust "A" O-10-25112 | Occidental Permian Ltd. only | Cowden, North | Ector | 1 | 1.66K | 924 | by Jan 1993 – Mar 1995 |
| Hinkson G-8-156642 | Upham, Chester R., Jr. only | Maxwell Trust (Congl.) | Palo Pinto | 1 | 1.66K | 84.2K | Nov 1995 – Sep 1999 |
| Matthews Trust "14" G-8-167313 | Kroh Operating LLC only | L. G. Cook (Miss.) | Shackelford | 1 | 1.65K | 354K | Mar 1998 – Jun 2025 |
| Frost National Bank Trust G-1-133985 | Carrizo Exploration, Inc. only | Dent Ingram (Olmos 1) | Dimmit | 1 | 1.65K | 256K | by Jan 1993 – Aug 2012 |
| Longfellow State "F" G-10-239465 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 1.64K | 1.67M | May 2008 – Jun 2023 |
| Alexander, M. Trust G-4-163971 | Hilcorp Energy Company only | Exsun (Lobo Cons.) | Zapata | 1 | 1.64K | 3.69M | Mar 1997 – Aug 2026 |
| Bracken Grandchildren Trust G-6-186659 | Valence Operating Company only | Noonday (Travis Peak) | Smith | 1 | 1.63K | 120K | Oct 2001 – Dec 2010 |
| West Ranch G-10-249739 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 1.63K | 1.86M | Apr 2008 – Apr 2024 |
| Young, T. D. Trust O-8-20952 | Ogs Operating Company, Inc. only | T. D. Y. (Ellenburger) | Nolan | 1 | 1.62K | 13 | by Jan 1993 – Jan 1994 |
| Henderson Trust "DD" G-9-143904 | Red Stag Operating, LLC only | Ozona (Canyon Sand) | Crockett | 1 | 1.62K | 1.21M | by Jan 1993 – Aug 2026 |
| Henderson Trust G-9-224157 | Apache Corporation only | Howards Creek (Canyon) | Crockett | 1 | 1.61K | 258K | Nov 2006 – Aug 2026 |
| Anthony, James E. Trustee O-6-5526 | Triple L Operating Company LLC only | Marion County (Shallow) | Marion | 1 | 1.6K | 20 | by Jan 1993 – Oct 2003 |
| West Ranch G-10-234740 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 1.59K | 1.59M | Oct 2007 – Mar 2026 |
| C-Bruni Mineral Trust G-4-64932 | Chevron U. S. A. Inc. only | Laredo (Lobo) | Webb | 1 | 1.59K | 292K | by Jan 1993 – Feb 2009 |
| Longfellow State "600" G-10-209877 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 1.59K | 14.6K | Dec 2004 – Jun 2006 |
| Frost National Bank Trustee O-1-14528 | Carrizo Exploration, Inc. only | Dent Ingram (Olmos 1) | Dimmit | 1 | 1.58K | 6.44K | Jul 2004 – Mar 2007 |
| West Ranch G-10-228888 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 1.58K | 2.08M | May 2007 – Aug 2026 |
| Coates Energy Trust et Al G-4-130863 | Magnum Engineering Company only | Rincon, North (Stray 3300) | Starr | 1 | 1.58K | 98.3K | by Jan 1993 – Apr 1998 |
| Longfellow G-10-103417 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 1.58K | 1.49M | by Jan 1993 – Feb 2025 |
| Dcrc Section 88 O-4-13558 | Dewbre, Jerry C., Trustee only | Arnold-Mulle (Mirando, UP) | Duval | 1 | 1.57K | 0 | Apr 2009 – May 2014 |
| Baily, James Trustee G-3-127517 | Shana Petroleum Company only | Paul (LW-27) | Colorado | 1 | 1.57K | 104K | by Jan 1993 – Jun 1995 |
| Dickinson, Charles B. Trust G-4-149456 | Valence Operating Company only | Picoso (Carrizo Spike 8070) | Webb | 1 | 1.57K | 336K | May 1994 – Nov 2007 |
| West Ranch G-10-218064 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 1.57K | 2.22M | May 2006 – Feb 2025 |
| Henderson Trust "EE" G-9-143870 | Red Stag Operating, LLC only | Ozona (Canyon Sand) | Crockett | 1 | 1.57K | 736K | by Jan 1993 – Aug 2026 |
| Bruni Mineral Trust G-4-197445 | Hilcorp Energy Company only | Liz (9200) | Webb | 1 | 1.56K | 621K | Sep 2003 – Aug 2026 |
| West Ranch G-10-243221 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 1.56K | 1.6M | Sep 2008 – Aug 2026 |