| North Cowden Unit O-10-20164 | Occidental Permian Ltd. only | Cowden, North | Ector | 1,651 | 99.7M | 44.2M | Jan 1993 – Apr 2026 |
| East Cowden (Grayburg) Unit O-10-22927 | Basin Oil & Gas Operating, LLC only | Cowden, North | Ector | 92 | 10.4M | 3.6M | Jan 1993 – Apr 2026 |
| Rhodes Cowden Unit O-10-20538 | OXY USA WTP LP only | Cowden, North | Ector | 170 | 8.15M | 6.14M | Jan 1993 – Apr 2026 |
| Corrigan Cowden Unit O-10-24118 | OXY USA Inc. only | Cowden, North | Ector | 56 | 6.42M | 1.79M | Jan 1993 – Apr 2026 |
| Cowden, Clyde O-10-38628 | Maverick Permian LLC only | Goldsmith (Clear Fork) | Ector | 174 | 4.78M | 7.86M | Nov 2006 – Apr 2026 |
| South Cowden Unit O-10-19297 | Conocophillips Company only | Cowden, South | Ector | 118 | 3.52M | 11.8M | Jan 1993 – Apr 2026 |
| Holt, O. B. /R/ O-10-797 | Occidental Permian Ltd. only | Cowden, North | Ector | 34 | 3.15M | 1.15M | Jan 1993 – Apr 2026 |
| Moss Unit O-10-16433 | Aghorn Operating, Inc. only | Cowden, South | Ector | 192 | 3.11M | 928K | Jan 1993 – Feb 2026 |
| Cowden, J. M. R/a -B- O-10-835 | Occidental Permian Ltd. only | Cowden, North (Deep) | Ector | 23 | 3.01M | 316K | Jan 1993 – Apr 2026 |
| Moss, Paul Unit O-10-875 | R3 Operating Corporation only | Cowden, South | Ector | 150 | 2.7M | 902K | Jan 1993 – Apr 2026 |
| Cowden, Clyde O-10-2309 | Conocophillips Company only | Goldsmith (5600) | Ector | 87 | 2.6M | 4.04M | Jan 1993 – Oct 2006 |
| Holt, O. B. -C- O-10-848 | Texland Petroleum, L.P. only | Cowden, North (Deep) | Ector | 32 | 2.52M | 335K | Jan 1993 – Apr 2026 |
| Holt, O. B. O-10-23396 | Texland Petroleum, L.P. only | Cowden, North | Ector | 134 | 2.08M | 705K | Jan 1993 – Apr 2026 |
| Emmons Unit O-10-906 | Aghorn Operating, Inc. only | Cowden, South | Ector | 58 | 1.87M | 1.5M | Jan 1993 – Feb 2026 |
| Rhodes O-10-22344 | OXY USA WTP LP only | Cowden, North (Clear Fork) | Ector | 4 | 1.79M | 456K | Jan 1993 – Apr 2026 |
| Woods, E. N. O-10-737 | OXY USA Inc. only | Cowden, North | Ector | 27 | 1.79M | 378K | Jan 1993 – Apr 2026 |
| Foster, H. O-10-22457 | Occidental Permian Ltd. only | Cowden, South (Canyon 8790) | Ector | 8 | 1.78M | 1.36M | Jan 1993 – Apr 2026 |
| Blakeney, B. H. /Holt Pay/ O-10-845 | Texland Petroleum, L.P. only | Cowden, North (Deep) | Ector | 24 | 1.72M | 386K | Jan 1993 – Apr 2026 |
| Cowden, Elliott F., -A- O-10-1579 | Occidental Permian Ltd. only | Foster | Ector | 102 | 1.66M | 552K | Jan 1993 – Apr 2026 |
| Moss,paul South(canyon 8790)UNIT O-10-32791 | R3 Operating Corporation only | Cowden, South (Canyon 8790) | Ector | 36 | 1.63M | 1.3M | Jan 1993 – Apr 2026 |
| Cowden, J. M. R/a -A- O-10-834 | Occidental Permian Ltd. only | Cowden, North (Deep) | Ector | 31 | 1.61M | 212K | Jan 1993 – Apr 2026 |
| Cowden, Elliott F. -A- O-10-21384 | Occidental Permian Ltd. only | Cowden, South (Canyon 8790) | Ector | 53 | 1.51M | 631K | Jan 1993 – Apr 2026 |
| Foster Gbsa Unit O-10-19371 | OXY USA Inc. only | Cowden, South | Ector | 131 | 1.48M | 585K | Jan 1993 – Apr 2026 |
| Barrow, Augusta O-10-14687 | Formentera Operations LLC only | Cowden, North | Ector | 16 | 1.45M | 69.9K | Jan 1993 – Nov 2025 |
| Holt, O. B. /S/ O-10-798 | Occidental Permian Ltd. only | Cowden, North | Andrews | 29 | 1.41M | 501K | Jan 1993 – Apr 2026 |
| Cowden, Elliott F., -B- O-10-1580 | Occidental Permian Ltd. only | Foster | Ector | 56 | 1.34M | 419K | Jan 1993 – Apr 2026 |
| Blakeney, B. H. O-10-843 | Texland Petroleum, L.P. only | Cowden, North (Deep) | Ector | 4 | 1.32M | 100K | Jan 1993 – Apr 2026 |
| Blakeney, B. H. -B- O-10-830 | Occidental Permian Ltd. only | Cowden, North (Deep) | Ector | 3 | 1.18M | 340K | Jan 1993 – Apr 2026 |
| Wight Unit O-10-20661 | United Oil & Shale LLC only | Cowden, North | Ector | 159 | 1.15M | 1.44M | Jan 1993 – Apr 2026 |
| Smith "19" O-10-34120 | Sahara Operating Company only | Cowden, North (Clear Fork) | Ector | 5 | 1.11M | 129K | Mar 1994 – Apr 2026 |
| Holt, Fay O-10-826 | OXY USA Inc. only | Cowden, North (Deep) | Ector | 11 | 1.01M | 174K | Jan 1993 – Apr 2026 |
| Foster 8 O-10-37284 | OXY USA WTP LP only | Cowden, South (Canyon 8790) | Ector | 3 | 998K | 907K | Feb 2004 – Apr 2026 |
| Moss Grayburg-San Andres Unit O-10-20089 | OXY USA Inc. only | Cowden, South | Ector | 39 | 960K | 248K | Jan 1993 – Apr 2026 |
| West Grayburg Unit O-10-20416 | Occidental Permian Ltd. only | Cowden, South | Ector | 41 | 951K | 257K | Jan 1993 – Apr 2026 |
| Cochran, W. C. O-10-828 | Texland Petroleum, L.P. only | Cowden, North (Deep) | Ector | 16 | 888K | 139K | Jan 1993 – Apr 2026 |
| Toad O-10-32025 | Texland Petroleum, L.P. only | Cowden, North (Deep) | Ector | 13 | 821K | 251K | Jan 1993 – Apr 2026 |
| Witcher, J. E. 19 O-10-37061 | OXY USA WTP LP only | Cowden, South (Canyon 8790) | Ector | 2 | 819K | 886K | Mar 2003 – Apr 2026 |
| Cowden O-10-50728 | Zarvona Energy LLC only | Novo (Mississippian) | Ector | 3 | 815K | 813K | Mar 2018 – Apr 2026 |
| Johnson -B-36- O-10-31640 | OXY USA Inc. only | Cowden, North (Canyon) | Ector | 7 | 686K | 506K | Jan 1993 – Apr 2026 |
| S. Foster Gbsa Unit O-10-19372 | OXY USA Inc. only | Cowden, South | Ector | 29 | 675K | 307K | Jan 1993 – Apr 2026 |
| Blakeney, B. H. -A- O-10-811 | OXY USA Inc. only | Cowden, North (Deep) | Ector | 7 | 670K | 170K | Jan 1993 – Mar 2026 |
| West South Cowden Unit O-10-20415 | Baker Operating, Inc. only | Cowden, South | Ector | 73 | 613K | 338K | Jan 1993 – Apr 2026 |
| Cowden -13- O-10-31983 | Aghorn Operating, Inc. only | Harper (Glorieta) | Ector | 9 | 600K | 210K | Jan 1993 – Feb 2026 |
| Foster, H. S. O-10-929 | Helms Oil & Gas, LLC only | Cowden, South | Ector | 25 | 577K | 409K | Jan 1993 – Mar 2022 |
| Ratliff O-10-14262 | R3 Operating Corporation only | Cowden, North | Ector | 38 | 552K | 33.6K | Jan 1993 – Apr 2026 |
| Blakeney, B. H. -C- O-10-813 | OXY USA Inc. only | Cowden, North (Deep) | Ector | 10 | 544K | 121K | Jan 1993 – Jan 2023 |
| Fasken, David -CH- O-10-28929 | Occidental Permian Ltd. only | Cowden, North | Andrews | 13 | 540K | 314K | Jan 1993 – Apr 2026 |
| 7814 JV-P Cran O-10-25322 | Libertad Operating LLC only | Cowden, North | Ector | 7 | 505K | 28.7K | Jan 1993 – Mar 2026 |
| Foster -AA- O-10-31466 | Occidental Permian Ltd. only | Cowden, South (Canyon 8900) | Ector | 1 | 493K | 882K | Jan 1993 – Nov 2009 |
| Cowden, W. F. -A- O-10-837 | Occidental Permian Ltd. only | Cowden, North (Deep) | Ector | 16 | 489K | 103K | Jan 1993 – Apr 2026 |