| Goldsmith-Landreth /Deep/ Unit O-10-19815 | Occidental Permian Ltd. only | Goldsmith (Clear Fork) | Ector | 655 | 34.6M | 51.7M | by Jan 1993 – Aug 2026 |
| Goldsmith-Landreth/San Andres/UT O-10-17491 | Atlas Operating LLC only | Goldsmith | Ector | 434 | 10.3M | 11.9M | by Jan 1993 – Aug 2026 |
| Jennifer (Queen) Unit O-10-32616 | Richland Resources Corporation only | Concho Bluff, North (Queen) | Ector | 58 | 2.89M | 21 | by Jan 1993 – Jul 2026 |
| Holt, O. B. -C- O-10-848 | Texland Petroleum, L.P. only | Cowden, North (Deep) | Ector | 32 | 2.52M | 336K | by Jan 1993 – Aug 2026 |
| Holt, O. B. O-10-23396 | Texland Petroleum, L.P. only | Cowden, North | Ector | 134 | 2.09M | 708K | by Jan 1993 – Aug 2026 |
| Blakeney, B. H. /Holt Pay/ O-10-845 | Texland Petroleum, L.P. only | Cowden, North (Deep) | Ector | 24 | 1.73M | 387K | by Jan 1993 – Aug 2026 |
| Blakeney, B. H. O-10-843 | Texland Petroleum, L.P. only | Cowden, North (Deep) | Ector | 4 | 1.33M | 101K | by Jan 1993 – Aug 2026 |
| Cochran, W. C. O-10-828 | Texland Petroleum, L.P. only | Cowden, North (Deep) | Ector | 16 | 890K | 139K | by Jan 1993 – Aug 2026 |
| Toad O-10-32025 | Texland Petroleum, L.P. only | Cowden, North (Deep) | Ector | 13 | 822K | 251K | by Jan 1993 – Aug 2026 |
| Toad-A- O-10-32438 | Texland Petroleum, L.P. only | Cowden, North (Deep) | Ector | 22 | 455K | 173K | by Jan 1993 – Aug 2026 |
| Holt, O. B., Jr., Etal O-10-820 | Texland Petroleum, L.P. only | Cowden, North (Deep) | Ector | 11 | 404K | 130K | by Jan 1993 – Aug 2026 |
| O.B. Holt O-10-35502 | Texland Petroleum, L.P. only | Venteam (Ellenburger) | Ector | 3 | 372K | 271K | Jul 1997 – May 2017 |
| Holt -D- O-10-847 | Texland Petroleum, L.P. only | Cowden, North (Deep) | Ector | 5 | 343K | 51.9K | by Jan 1993 – Aug 2026 |
| Ector 'BH' Fee O-10-35146 | Texland Petroleum, L.P. only | Cowden, North (Clear Fork) | Ector | 3 | 342K | 25 | Nov 1996 – Aug 2026 |
| Holt, O. B. Jr. -A- O-10-819 | Texland Petroleum, L.P. only | Cowden, North (Deep) | Ector | 2 | 302K | 24.1K | by Jan 1993 – Aug 2026 |
| Holt, O. B., Tract 1 O-10-20906 | Texland Petroleum, L.P. only | Triple-N (Penn., Upper) | Ector | 5 | 223K | 189K | by Jan 1993 – Aug 2026 |
| T. P. Land Trust -A- O-10-839 | Occidental Permian Ltd. only | Cowden, North (Deep) | Ector | 5 | 163K | 20.1K | by Jan 1993 – Aug 2026 |
| T. P. Land Trust -B- O-10-840 | Occidental Permian Ltd. only | Cowden, North (Deep) | Ector | 4 | 157K | 5.48K | by Jan 1993 – Aug 2026 |
| Parker Ranchland 22 O-10-44362 | Flat Top Operating, LLC only | Monahans Draw (Canyon 8388) | Ector | 4 | 148K | 430K | Oct 2012 – Aug 2026 |
| Parker Ranchland 21 O-10-44727 | Flat Top Operating, LLC only | Monahans Draw (Canyon 8388) | Ector | 4 | 147K | 296K | Nov 2013 – Aug 2026 |
| Steakley "5" O-10-40977 | Waylander LLC only | Goldsmith (Clear Fork) | Ector | 7 | 141K | 360K | Dec 2010 – Aug 2026 |
| Edwards Unit O-10-22848 | Pfog Operations, LLC only | Bourland (San Andres) | Ector | 27 | 139K | 28.1K | by Jan 1993 – Nov 2018 |
| Holt, O. B. O-10-807 | Texland Petroleum, L.P. only | Cowden, North | Ector | 1 | 132K | 17.3K | Jan 1994 – Aug 2026 |
| Midland Farms -AA- O-10-30032 | Occidental Permian Ltd. only | Cowden, North | Ector | 2 | 121K | 81.6K | by Jan 1993 – Sep 2021 |
| Cowden, Emma O-10-825 | Texland Petroleum, L.P. only | Cowden, North (Deep) | Ector | 5 | 119K | 6.22K | by Jan 1993 – Aug 2026 |
| Midland Farms -AJ- O-10-25660 | Fasken Oil and Ranch, Ltd. only | Fasken (Wolfcamp, North) | Ector | 2 | 105K | 199K | by Jan 1993 – Dec 2023 |
| Edwards 31 O-10-48245 | Adventure Operating Company, LLC only | Bourland (San Andres) | Ector | 2 | 105K | 57.2K | Oct 2016 – Sep 2018 |
| Toad O-10-32060 | Texland Petroleum, L.P. only | Cowden, North | Ector | 8 | 103K | 55.7K | by Jan 1993 – Aug 2026 |
| Holt, O. B. O-10-20962 | Texland Petroleum, L.P. only | Cowden, North (Deep) | Ector | 1 | 103K | 12.3K | by Jan 1993 – Aug 2026 |
| Midland Farms O-10-716 | Aghorn Operating, Inc. only | Cowden, North | Ector | 13 | 100K | 70.6K | by Jan 1993 – Sep 2019 |
| Toad -A- O-10-32736 | Texland Petroleum, L.P. only | Cowden, North | Ector | 4 | 73.2K | 20.1K | by Jan 1993 – Aug 2022 |
| Holt, O. B., Tract 4 O-10-20907 | Texland Petroleum, L.P. only | Triple-N (Penn., Upper) | Ector | 4 | 55.7K | 84.4K | by Jan 1993 – Aug 2026 |
| Holt, O. B. -B- O-10-36414 | Texland Petroleum, L.P. only | Cowden, North (Deep) | Ector | 1 | 39.8K | 55 | Sep 2000 – Aug 2026 |
| Midland Farms Company -E- O-10-30059 | Fasken Oil and Ranch, Ltd. only | Fasken (Penn.) | Ector | 4 | 38.1K | 422K | by Jan 1993 – Jun 2021 |
| Slator, J. D. O-10-14863 | Richland Resources Corporation only | TXL (Tubb) | Ector | 1 | 24.3K | 11.1K | by Jan 1993 – Jul 2026 |
| Exxon-Barrow O-10-35922 | Texland Petroleum, L.P. only | Barrow, West (Wolfcamp) | Ector | 1 | 23.1K | 18.4K | Oct 1998 – Mar 2009 |
| Midland Farms Company O-10-29508 | Fasken Oil and Ranch, Ltd. only | Fasken (Penn.) | Ector | 2 | 22.5K | 324K | by Jan 1993 – Jul 2024 |
| Lands, T. P. Trust -D- O-10-17654 | Aghorn Operating, Inc. only | Lawson (San Andres) | Ector | 4 | 18.6K | 50.7K | by Jan 1993 – Jan 2015 |
| Goldsmith-Landreth (Deep) Unit G-10-154206 | Occidental Permian Ltd. only | Goldsmith (Clear Fork) | Ector | 1 | 17.6K | 1.58M | Mar 1995 – Mar 2002 |
| Holt, Sr. O-10-36736 | Texland Petroleum, L.P. only | Penteam (Queen) | Ector | 1 | 17K | 155K | Feb 2001 – Aug 2026 |
| Grove, W. H. O-10-13457 | Richland Resources Corporation only | TXL (Tubb) | Ector | 2 | 17K | 27.8K | by Jan 1993 – Oct 2003 |
| Midland Farms -AV- O-10-20818 | Apache Corporation only | Fasken (Penn.) | Ector | 3 | 14.8K | 31.6K | by Jan 1993 – Nov 2006 |
| Phillips-Midland National Bank O-10-30554 | Apache Corporation only | Fasken (Wolfcamp, North) | Ector | 1 | 14.8K | 16.4K | by Jan 1993 – Jul 1998 |
| Holt, O. B., Tract 4 O-10-51340 | Texland Petroleum, L.P. only | Venteam (Fusselman) | Ector | 1 | 11.6K | 7.02K | Mar 2019 – Dec 2024 |
| Cowden, Emma "D" O-10-37226 | Texland Petroleum, L.P. only | Cowden, North | Ector | 2 | 11.3K | 11.3K | Feb 2004 – May 2019 |
| Mobil O-10-33971 | Ausland Production Company only | Three Leaguers (Clearfork) | Ector | 1 | 11K | 30 | Oct 1993 – Sep 1996 |
| Parker Ranchland 22 O-10-43315 | Ica Energy Operating, L.L.C. only | Harper (Devonian) | Ector | 1 | 9.8K | 13.4K | Jun 2012 – Mar 2013 |
| Exxon-Barrow "16" O-10-36042 | Texland Petroleum, L.P. only | Dolphin (U. Spraberry) | Ector | 1 | 9.63K | 47 | Jun 1999 – Dec 2001 |
| Cochran, W. C. O-10-36647 | Texland Petroleum, L.P. only | Cowden, North (Wichita-Albany) | Ector | 1 | 8.04K | 1.26K | Aug 2001 – Jan 2017 |
| Midland Farms -AJ- O-10-9162 | Apache Corporation only | Fasken (Penn.) | Ector | 3 | 6.53K | 16.4K | by Jan 1993 – Jan 1997 |