| Storey 138 G-1-252816 | Lewis Petro Properties, Inc. only | Hawkville (Eagleford Shale) | La Salle | 1 | 179K | 1.83M | Aug 2009 – Aug 2026 |
| Champion Int'l Unit A-1138 G-6-150308 | Sonat Exploration Company -Tyler only | Brookeland (Austin Chalk, 8800) | Newton | 1 | 135K | 528K | May 1994 – Feb 1995 |
| Cerrito Land Company 1389 G-4-74872 | Lewis Petro Properties, Inc. only | Owen (Escondido) | Webb | 1 | 5.6K | 83.5K | by Jan 1993 – Feb 2003 |
| Daytona 138 G-14-264765 | Unbridled Resources, LLC only | Lipscomb, S.E. (Cleveland) | Hemphill | 1 | 3.44K | 78.5K | Nov 2011 – Jul 2025 |
| West Ranch 138 G-10-240178 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 3.09K | 614K | May 2008 – Aug 2026 |
| Richardson 138 G-9-170921 | Upp Operating, LLC only | Sawyer (Strawn, North) | Sutton | 1 | 1.99K | 227K | Oct 1998 – Jul 2026 |
| Richardson 138 G-9-176643 | Upp Operating, LLC only | Sawyer (Strawn, North) | Sutton | 1 | 1.89K | 1.14M | Jan 2000 – Jul 2026 |
| Cameron W.I. 138 G-4-225754 | Forest Oil Corporation only | Cameron (K, Lower) | Starr | 1 | 1.85K | 28.2K | Feb 2007 – Oct 2007 |
| Richardson 138 G-9-173413 | Upp Operating, LLC only | Sawyer (Strawn, North) | Sutton | 1 | 1.75K | 1.29M | Jun 1999 – Jul 2026 |
| Webb County School Land 1383L G-4-159883 | Lewis Petro Properties, Inc. only | Owen (Olmos) | Webb | 1 | 1.4K | 690K | Aug 1996 – Aug 2026 |
| Webb County School Land 1384 G-4-159806 | Lewis Petro Properties, Inc. only | Owen (Olmos) | Webb | 1 | 984 | 654K | Jul 1996 – Aug 2026 |
| Webb County School Land "1383L" G-4-170459 | Lewis Petro Properties, Inc. only | Owen (Olmos) | Webb | 1 | 690 | 628K | Aug 1998 – Aug 2026 |
| Webb County School Land 1383L G-4-166504 | Lewis Petro Properties, Inc. only | Owen (Olmos) | Webb | 1 | 678 | 531K | Nov 1997 – Jul 2026 |
| Richardson 138 G-9-176641 | Upp Operating, LLC only | Sawyer (Canyon) | Sutton | 1 | 579 | 437K | Jan 2000 – Jul 2026 |
| Webb County School Land 1383 L G-4-167285 | Lewis Petro Properties, Inc. only | Owen (Olmos) | Webb | 1 | 572 | 386K | Jan 1998 – Aug 2026 |
| Webb County School Land 1383 G-4-208795 | Lewis Petro Properties, Inc. only | Owen (Olmos) | Webb | 1 | 560 | 294K | Apr 2005 – Jul 2026 |
| Savage G-3-174702 | EOG Resources, Inc. only | Wadsworth (11380) | Matagorda | 1 | 504 | 9.33K | Dec 1998 – Jan 1999 |
| Richardson 138 G-9-170753 | Dreyfus, Louis Natural Gas Corp only | Sawyer (Strawn, North) | Sutton | 1 | 497 | 3.57K | Oct 1998 – Jan 1999 |
| Cerrito Land Co. 1389 G-4-165988 | Lewis Petro Properties, Inc. only | Owen (Olmos) | Webb | 1 | 458 | 748K | Oct 1997 – Jul 2026 |
| Richardson 138 G-9-188829 | Upp Operating, LLC only | Sawyer (Canyon) | Sutton | 1 | 439 | 178K | Jan 2002 – Jul 2026 |
| Richardson 138 G-9-173983 | Upp Operating, LLC only | Sawyer (Canyon) | Sutton | 1 | 418 | 245K | Jul 1999 – Jul 2026 |
| Webb County School Land 1383L G-4-209795 | Lewis Petro Properties, Inc. only | Owen (Olmos) | Webb | 1 | 408 | 199K | Mar 2005 – Aug 2026 |
| Richardson 138 G-9-59231 | Upp Operating, LLC only | Sawyer (Canyon) | Sutton | 1 | 399 | 77.8K | by Jan 1993 – Jul 2026 |
| Webb County School Land 1383L G-4-211500 | Lewis Petro Properties, Inc. only | Owen (Olmos) | Webb | 1 | 397 | 199K | Jun 2005 – Jul 2026 |
| Richardson 138 G-9-109034 | Upp Operating, LLC only | Sawyer (Canyon) | Sutton | 1 | 382 | 162K | by Jan 1993 – Jul 2026 |
| Seim, Agnes G-2-233244 | Cimrod, LLC only | Yorktown, N (Edwards 13850) | De Witt | 1 | 348 | 163K | Jan 2008 – Aug 2012 |
| Richardson 138 G-9-89785 | Upp Operating, LLC only | Sawyer (Canyon) | Sutton | 1 | 333 | 314K | by Jan 1993 – Jul 2026 |
| W.C.S.L. 1383 G-4-167609 | Lewis Petro Properties, Inc. only | Owen (Olmos) | Webb | 1 | 291 | 306K | Apr 1998 – Aug 2026 |
| Webb County School Land 1384 G-4-210942 | Lewis Petro Properties, Inc. only | Owen (Olmos) | Webb | 1 | 287 | 262K | May 2005 – Aug 2026 |
| Webb County School Land 1383L G-4-203515 | Lewis Petro Properties, Inc. only | Owen (Olmos) | Webb | 1 | 265 | 300K | Jun 2004 – Jul 2026 |
| Richardson 138 G-9-206120 | Upp Operating, LLC only | Sawyer (Canyon) | Sutton | 1 | 260 | 220K | Jan 2004 – Jul 2026 |
| Richardson 138 G-9-234667 | Upp Operating, LLC only | Sawyer (Canyon) | Sutton | 1 | 247 | 160K | Mar 2007 – Jul 2026 |
| Richardson 138 G-9-188977 | Upp Operating, LLC only | Sawyer (Canyon) | Sutton | 1 | 240 | 246K | Apr 2002 – Jul 2026 |
| Richardson 138 G-9-188973 | Upp Operating, LLC only | Sawyer (Canyon) | Sutton | 1 | 230 | 163K | Jan 2002 – Jul 2026 |
| Richardson 138 G-9-101487 | Upp Operating, LLC only | Sawyer (Canyon) | Sutton | 1 | 226 | 276K | by Jan 1993 – Jul 2026 |
| Webb County School Land 1383L G-4-229353 | Lewis Petro Properties, Inc. only | Owen (Olmos) | Webb | 1 | 216 | 233K | Jun 2007 – Aug 2026 |
| Webb County School Land 1383L G-4-159443 | Lewis Petro Properties, Inc. only | Owen (Olmos) | Webb | 1 | 202 | 324K | Jul 1996 – Aug 2026 |
| Cerrito Land Company 1389 G-4-286073 | Lewis Petro Properties, Inc. only | Owen (Escondido) | Webb | 1 | 202 | 53.7K | Mar 2019 – May 2025 |
| Richardson 138 G-9-131836 | Upp Operating, LLC only | Sawyer (Canyon) | Sutton | 1 | 197 | 235K | by Jan 1993 – Jul 2026 |
| Webb County School Land 1384 G-4-197776 | Lewis Petro Properties, Inc. only | Owen (Olmos) | Webb | 1 | 196 | 198K | Aug 2003 – Aug 2026 |
| Cerrito 1389 G-4-195372 | Lewis Petro Properties, Inc. only | Owen (Olmos) | Webb | 1 | 195 | 609K | May 2003 – May 2026 |
| Richardson 138 G-9-89760 | Upp Operating, LLC only | Sawyer (Canyon) | Sutton | 1 | 185 | 182K | by Jan 1993 – Jul 2026 |
| West Ranch 138 G-10-223165 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 176 | 64.2K | Dec 2005 – Feb 2022 |
| Webb County School Land 1383L G-4-218435 | Lewis Petro Properties, Inc. only | Owen (Olmos) | Webb | 1 | 136 | 248K | Jan 2006 – Aug 2026 |
| Richardson 138 G-9-242278 | Upp Operating, LLC only | Sawyer (Canyon) | Sutton | 1 | 119 | 101K | Jul 2008 – Jul 2026 |
| VT Manry St of TX 1138 G-4-226872 | Lewis Petro Properties, Inc. only | Las Tiendas (Olmos) | Webb | 1 | 111 | 172K | Apr 2007 – Aug 2026 |
| Webb County School Land 1384 G-4-159669 | Lewis Petro Properties, Inc. only | Owen (Olmos) | Webb | 1 | 108 | 158K | Jul 1996 – Aug 2026 |
| Webb County School Land 1383 G-4-211502 | Lewis Petro Properties, Inc. only | Owen (Olmos) | Webb | 1 | 70 | 120K | Jun 2005 – Apr 2026 |
| Webb County School Land 1383L G-4-216728 | Lewis Petro Properties, Inc. only | Owen (Olmos) | Webb | 1 | 68 | 207K | Jan 2006 – Aug 2026 |
| Richardson 138 G-9-96878 | Upp Operating, LLC only | Sawyer (Canyon) | Sutton | 1 | 67 | 145K | by Jan 1993 – Mar 2009 |