| East Cowden (Grayburg) Unit O-10-22927 | Basin Oil & Gas Operating, LLC only | Cowden, North | Ector | 92 | 10.4M | 3.6M | Jan 1993 – Jul 2026 |
| Moss Grayburg-San Andres Unit O-10-20089 | OXY USA Inc. only | Cowden, South | Ector | 39 | 960K | 248K | Jan 1993 – Jul 2026 |
| West Grayburg Unit O-10-20416 | Occidental Permian Ltd. only | Cowden, South | Ector | 41 | 951K | 257K | Jan 1993 – Jul 2026 |
| Edwards Field Grayburg Unit O-10-20424 | AD Astra Resources, LLC only | Edwards | Ector | 84 | 585K | 120K | Jan 1993 – Jul 2026 |
| Lazy E "A" O-10-33519 | Beach Exploration, Inc. only | Double -H- (Grayburg) | Ector | 7 | 327K | 81.7K | Jan 1993 – Jul 2026 |
| Kloh, A., Etal -G- /NCT-B/ O-10-14412 | Acoma Operating, LLC only | Moss (Grayburg) | Ector | 5 | 186K | 164K | Jan 1993 – Jul 2026 |
| Foster, H. S. -C- O-10-9641 | Helms Oil & Gas, LLC only | Double -H- (Grayburg) | Ector | 6 | 185K | 104K | Jan 1993 – Jul 2026 |
| Barrow, Augusta O-10-27395 | Formentera Operations LLC only | Hence (Grayburg) | Ector | 3 | 110K | 17.8K | Jan 1993 – Jul 2026 |
| Lazy -E- O-10-33271 | Beach Exploration, Inc. only | Double -H- (Grayburg) | Ector | 4 | 109K | 32.6K | Jan 1993 – Jul 2026 |
| Edwards -B- II O-10-13633 | Baker Operating, Inc. only | Double -H- (Grayburg) | Ector | 5 | 82.8K | 1.25K | Jan 1993 – Jul 2026 |
| Edwards-Brown -B- O-10-28930 | Baker Operating, Inc. only | Double -H- (Grayburg) | Ector | 3 | 68.6K | 114K | Jan 1993 – Jul 2026 |
| Ector 'BF' Fee O-10-34397 | Diamond S Energy Company only | York (Grayburg) | Ector | 4 | 65K | 326K | Jan 1995 – Jul 2026 |
| Edwards O-10-46498 | Flat Top Operating, LLC only | Double -H- (Grayburg) | Ector | 3 | 61K | 0 | Apr 2015 – Jul 2026 |
| Edwards-Ranch -B- O-10-27807 | Baker Operating, Inc. only | Double -H- (Grayburg) | Ector | 3 | 30.4K | 28.6K | Jan 1993 – Jul 2026 |
| Edwards -B- O-10-13416 | Baker Operating, Inc. only | Double -H- (Grayburg) | Ector | 5 | 28.7K | 82.4K | Jan 1993 – Jul 2026 |
| Edwards O-10-37755 | Schalk Oil Company, Inc. only | Double -H- (Grayburg) | Ector | 1 | 22.8K | 0 | Dec 2005 – Jul 2021 |
| Shell, Edwards O-10-30682 | Baker Operating, Inc. only | Double -H- (Grayburg) | Ector | 2 | 21.7K | 8.77K | Jan 1993 – Jul 2026 |
| Foster, B. J. -A- O-10-35215 | Baker Operating, Inc. only | Double -H- (Grayburg) | Ector | 1 | 21.6K | 0 | Feb 1997 – Jul 2026 |
| Goldsmith, C. A. O-10-38510 | Hilcorp Energy Company only | Goldsmith (Grayburg) | Ector | 4 | 21.2K | 709K | Jun 2007 – Jul 2026 |
| Edwards -41- O-10-30162 | Baker Operating, Inc. only | Double -H- (Grayburg) | Ector | 1 | 20.3K | 9.01K | Jan 1993 – Jul 2026 |
| Edwards Estate O-10-27063 | Midenergy Operating, LLC only | Double -H- (Grayburg) | Ector | 1 | 13.5K | 594 | Jan 1993 – Feb 2017 |
| Father Mulcahy O-10-37413 | Andector Exploration Company only | Goldsmith (Grayburg) | Ector | 1 | 9.49K | 0 | Mar 2004 – Mar 2012 |
| Cowden O-10-17307 | Sundown Energy LP only | Donnelly, North (Grayburg) | Ector | 2 | 4.9K | 249K | Jan 1993 – Jul 2026 |
| York, R. L. -B- O-10-33939 | Legacy Reserves Operating LP only | York (Queen-Grayburg) | Ector | 1 | 4.12K | 3.75K | Sep 1993 – Feb 2020 |
| Fraser, G. C. -F- O-10-14162 | Sunray Energy, Inc. only | Goldsmith (5600) | Ector | 2 | 4.07K | 17.9K | Jan 1993 – Jul 2011 |
| TXL 1902-T O-10-33940 | Endeavor Energy Resources L.P. only | York (Queen-Grayburg) | Ector | 4 | 3.23K | 17.5K | Sep 1993 – May 2023 |
| Embar O-10-39756 | Conocophillips Company only | Andector (Grayburg) | Ector | 2 | 3.06K | 0 | Feb 2010 – Jul 2018 |
| TXL O-10-33630 | Denbury Management, Inc. only | York (Grayburg) | Ector | 3 | 2.37K | 2.23K | Jan 1993 – Dec 1993 |
| Embar-B O-10-35562 | Conocophillips Company only | Andector (Grayburg) | Andrews | 2 | 2.3K | 12.2K | Jun 1997 – Oct 2013 |
| Micki O-10-35740 | Griffin Petroleum Company only | Goldsmith, East (Grayburg) | Ector | 1 | 1.02K | 1.69K | Feb 1998 – Jul 1999 |
| Goldsmith-Blakeney /SA/Unit O-10-37638 | Occidental Permian Ltd. only | Goldsmith, East (Grayburg) | Ector | 1 | 642 | 24 | Sep 2005 – Jul 2013 |
| TXL "23" O-10-33752 | Denbury Management, Inc. only | York (Grayburg) | Ector | 1 | 399 | 548 | Jan 1993 – Dec 1993 |
| TXL "27" O-10-33867 | Denbury Management, Inc. only | York (Grayburg) | Ector | 1 | 173 | 8 | Jan 1993 – Sep 1993 |
| TXL -23- O-10-33941 | Denbury Management, Inc. only | York (Queen-Grayburg) | Ector | 1 | 92 | 166 | Sep 1993 – Dec 1997 |
| TXL -27 O-10-33942 | Denbury Management, Inc. only | York (Queen-Grayburg) | Ector | 1 | 26 | 1 | Sep 1993 – Dec 1997 |
| TXL "At" O-10-35018 | Mariah Energy Corp. only | Mosswell (Grayburg-San Andres) | Ector | 1 | 17 | 13 | Jun 1996 – Feb 1997 |
| Edwards -28- O-10-26878 | Cuervo, Inc. only | Double -H- (Grayburg) | Ector | 1 | 8 | 0 | Jan 1993 – May 2016 |
| Edwards Estate O-10-28418 | Cuervo, Inc. only | Double -H- (Grayburg) | Ector | 2 | 2 | 0 | Jan 1993 – Jul 2026 |
| Embry G-10-180897 | Alleder Inc. only | Goldsmith, East (Grayburg) | Ector | 1 | 0 | 13.1K | Oct 2000 – Mar 2023 |
| Forest G-10-176383 | Yucca Energy, Inc. only | Goldsmith, East (Grayburg) | Ector | 1 | 0 | 46K | Jan 2000 – Sep 2016 |
| Forest G-10-173006 | Yucca Energy, Inc. only | Goldsmith, East (Grayburg) | Ector | 1 | 0 | 537K | Apr 1999 – Oct 2016 |
| Goldsmith, C. A. et Al G-10-168902 | Hilcorp Energy Company only | Goldsmith (Grayburg) | Ector | 1 | 0 | 89.4K | Feb 1998 – Jul 2026 |
| Goldsmith, C. A. et Al G-10-166065 | Hilcorp Energy Company only | Goldsmith (Grayburg) | Ector | 1 | 0 | 624K | Mar 1997 – Jul 2026 |
| Ector Fee '19' G-10-160602 | Diamond S Energy Company only | York (Queen-Grayburg) | Ector | 1 | 0 | 489K | Oct 1996 – Jul 2026 |
| Embar G-10-159032 | Conocophillips Company only | Andector (Grayburg) | Ector | 1 | 0 | 62.9K | Jun 1996 – May 2018 |
| Embar G-10-156316 | Conocophillips Company only | Andector (Grayburg) | Ector | 1 | 0 | 724K | Nov 1995 – Aug 2015 |
| Cowden "Q" O-10-32351 | Key Energy Services, LLC only | Vem (Grayburg) | Ector | 1 | 0 | 0 | Jan 1993 – Jul 2026 |
| Nobles G-10-155823 | Maverick Permian LLC only | Andector (Grayburg) | Ector | 1 | 0 | 518K | Sep 1995 – Jul 2026 |
| Goldsmith, C. A. et Al G-10-154657 | Hilcorp Energy Company only | Goldsmith (Grayburg) | Ector | 1 | 0 | 1.62M | May 1995 – Jul 2026 |
| Scharbauer, C. "H" G-10-153907 | Occidental Permian Ltd. only | Goldsmith, East (Grayburg) | Ector | 1 | 0 | 29.3K | Aug 1994 – Oct 2000 |