| West Ranch G-10-215435 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 289 | 306K | Aug 2005 – Apr 2024 |
| Buckler Trust "233" Unit G-8-143285 | Ashtola Exploration Company,inc. only | Florence (Caddo) | Throckmorton | 1 | 287 | 3.53K | by Jan 1993 – Mar 1993 |
| Longfellow G-10-170418 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 286 | 347K | Aug 1998 – Aug 2026 |
| Rust Ranch O-9-6652 | North Concho Reclamation only | Rust Ranch (2340) | Kimble | 1 | 286 | 0 | Apr 1997 – Apr 1998 |
| Allison G-10-239362 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 286 | 1.86M | Dec 2007 – Jan 2026 |
| McGrede, G. E. O-7-6723 | Aaa Oil Trust only | East Texas | Gregg | 2 | 285 | 17 | by Jan 1993 – Apr 1994 |
| West State G-10-235791 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 285 | 5.56M | Aug 2007 – Sep 2025 |
| Kincaid, A. R. Trust 'C' G-9-290494 | Scout Energy Management LLC only | Ozona (Canyon Sand, Oil) | Crockett | 1 | 284 | 13.9K | Feb 2021 – Aug 2026 |
| West Ranch G-10-252705 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 284 | 286K | Jun 2008 – Aug 2026 |
| Realty Trust G-10-63542 | Incline Energy only | Pecos Valley (Wolfcamp) | Pecos | 1 | 284 | 137K | by Jan 1993 – Nov 2002 |
| West Ranch G-10-201354 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 279 | 323K | Feb 2004 – Jul 2026 |
| Camp Trust -A- O-1-11406 | More Texas Oil only | C.J.P. (Reef) | Atascosa | 1 | 279 | 6 | by Jan 1993 – Oct 2008 |
| Bruni Mineral Trust "A" G-4-180809 | Tepee Petroleum Co., Inc. only | Glen Martin (Wilcox 6000) | Webb | 1 | 279 | 282K | Jan 2001 – Jun 2004 |
| Burns Trustee "A" O-11-62398 | Magnum Engineering Company only | Ackerly (Dean Sand) | Martin | 1 | 278 | 90 | by Jan 1993 – Oct 1994 |
| Henderson Trust "OO" G-9-152145 | Red Stag Operating, LLC only | Ozona (Canyon Sand) | Crockett | 1 | 275 | 180K | Sep 1994 – Aug 2026 |
| Henderson Trust BB G-9-158864 | EOG Resources, Inc. only | Hunt-Baggett, W. (Strawn) | Crockett | 1 | 272 | 417K | May 1996 – Jul 2008 |
| Eubanks Trust G-5-171346 | Diversified Production LLC only | Teague (CV-Bossier Cons.) | Freestone | 1 | 272 | 2.29M | Sep 1998 – Aug 2026 |
| West Ranch G-10-239467 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 271 | 1.13M | Apr 2008 – Mar 2024 |
| Gresham Trust Unit A G-5-263137 | Comstock Oil & Gas, LLC only | Hayden Lake (Bossier) | Leon | 1 | 271 | 4.52M | May 2011 – Aug 2026 |
| Wm James Trust G-4-58602 | Lewis Petro Properties, Inc. only | Owen (Olmos) | Webb | 1 | 271 | 327K | by Jan 1993 – Aug 2026 |
| Wm James Trust G-4-217212 | Lewis Petro Properties, Inc. only | Owen (Olmos) | Webb | 1 | 271 | 295K | Dec 2005 – Aug 2026 |
| Haynes Mineral Trust G-4-194789 | Hilcorp Energy Company only | Haynes (Middle Wilcox Cons.) | Zapata | 1 | 270 | 3.76M | Mar 2003 – Aug 2026 |
| Cowden Ranch '6A' O-10-64413 | Rust Oil Corp. only | Cowden (Wolfcamp) | Ector | 2 | 269 | 0 | Nov 2025 – Aug 2026 |
| West Ranch G-10-224275 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 267 | 530K | Mar 2006 – Oct 2022 |
| Guaranty Title & Trust "A" O-4-13255 | Peoples Energy Prod.-TX, L.P. only | Corpus Christi, W. ( 9800 Frio) | Nueces | 1 | 267 | 5.1K | Jul 2004 – Jan 2005 |
| Benavides Mineral Trust G-4-150079 | EOG Resources, Inc. only | Lopeno, NE (A-3) | Zapata | 1 | 267 | 1.03M | May 1994 – Apr 1999 |
| West Ranch G-10-245718 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 265 | 957K | Jul 2008 – Aug 2026 |
| McLean, Marrs Trust G-4-182753 | Columbus Energy, LLC only | Thompsonville, NE. (12500) | Jim Hogg | 1 | 263 | 4.17M | May 2001 – Aug 2026 |
| Haynes Mineral Trust G-4-168835 | Hilcorp Energy Company only | Haynes (Middle Wilcox Cons.) | Zapata | 1 | 262 | 1.25M | Jun 1998 – Aug 2026 |
| Martin, Albert Mineral Trust G-1-150288 | Proline Energy Resources Inc only | Cooke (Edwards Lime) | La Salle | 1 | 261 | 52.3K | Apr 1994 – Dec 1999 |
| Marrs McLean Trust G-4-184921 | Columbus Energy, LLC only | Thompsonville, NE. (12500) | Jim Hogg | 1 | 261 | 7.36M | Sep 2001 – Aug 2026 |
| Cowden Ranch '7A' O-10-64373 | Rust Oil Corp. only | Cowden (Wolfcamp) | Ector | 1 | 260 | 0 | Oct 2025 – Aug 2026 |
| West Ranch G-10-190703 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 260 | 2.83M | Aug 2002 – Aug 2026 |
| El Peyote Mineral Trust G-4-141922 | TD Natural Resources LLC only | Loma Vieja (Wilcox) | Zapata | 1 | 260 | 23.7M | by Jan 1993 – Aug 2026 |
| Rand-Paulson Riley Trust G-5-170391 | Diversified Production LLC only | Bohlwhite (Cotton Valley Lime) | Robertson | 1 | 260 | 10.5M | Aug 1998 – Aug 2026 |
| Wright Trust O-1-17643 | Marathon Oil EF LLC only | Indio Tanks (Pearsall) | Wilson | 1 | 259 | 0 | May 2013 – Dec 2013 |
| Longfellow 600 MD G-10-249208 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 256 | 454K | Aug 2008 – Aug 2026 |
| De la Garza Mineral Trust O-4-12161 | Meridian Oil Production Inc. only | Carolina-Tex, W. (2640) | Webb | 1 | 256 | 190 | Feb 1993 – Oct 1993 |
| Wardner Trustee O-4-6513 | Poor Boy Oilfield Service only | El Tanque, N. (1700) | Starr | 2 | 255 | 36 | by Jan 1993 – Jan 1996 |
| Trustee #2A G-4-171653 | Star of Texas Energy Srvs, Inc. only | Amore (Vicksburg 5500) | Starr | 1 | 254 | 148K | Dec 1998 – Sep 2001 |
| Henderson Trust "DD" G-9-142509 | Red Stag Operating, LLC only | Ozona, SW. (Strawn) | Crockett | 1 | 254 | 456K | Feb 1993 – Jan 1995 |
| Longfellow G-10-243239 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 253 | 1.16M | Aug 2008 – Apr 2026 |
| Hill-Fawcett, Randee Trust "A" G-9-212121 | Upp Operating, LLC only | Sawyer (Canyon) | Sutton | 1 | 252 | 135K | May 2005 – Jul 2026 |
| Neeper, B.E. O-8-17332 | Foree, R. L. Trust "A" only | Neeper (Canyon Sand) | Fisher | 2 | 251 | 4.8K | by Jan 1993 – Oct 1993 |
| Wells, Ed. M. Trust O-1-3984 | Ginco Operating Co. only | Somerset | Atascosa | 19 | 251 | 15 | Mar 1993 – Nov 1995 |
| West Ranch G-10-227205 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 251 | 1.4M | Feb 2007 – Jul 2026 |
| Wm James Trust G-4-62015 | Lewis Petro Properties, Inc. only | Owen (Olmos) | Webb | 1 | 250 | 293K | by Jan 1993 – Aug 2026 |
| Reed, T. M. O-2-7252 | Bledsoe, R.K. Trust Oil Operator only | Cabeza Creek (Pettus, S.) | Goliad | 1 | 249 | 57 | May 1993 – Dec 1998 |
| Zeidman Trustee GU G-3-164975 | Mountain V Texas, LLC only | Ciervo Grande (Middle Wilcox) | Wharton | 1 | 248 | 3.7M | Oct 1997 – Jul 2026 |
| West Ranch G-10-237838 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 248 | 2.55M | Jul 2007 – Sep 2025 |