| TXL South Unit O-10-20726 | Formentera Operations LLC only | TXL (Tubb) | Ector | 718 | 21.3M | 42.2M | Jan 1993 – Apr 2026 |
| TXL North Unit O-10-20487 | Formentera Operations LLC only | TXL (Tubb) | Ector | 496 | 13.9M | 40.3M | Jan 1993 – Apr 2026 |
| Goldsmith-Cummins /Deep/ Unit O-10-20543 | Formentera Operations LLC only | Goldsmith (Clear Fork) | Ector | 396 | 10.2M | 28.1M | Jan 1993 – Apr 2026 |
| Hausser O-1-17183 | Formentera Operations LLC only | Briscoe Ranch (Eagleford) | Frio | 39 | 6.83M | 2.48M | Jul 2013 – Apr 2026 |
| Sand Storm Unit 2 O-10-57681 | XTO Energy Inc. only | Spraberry (Trend Area) | Martin | 9 | 3.03M | 9.51M | Nov 2022 – Apr 2026 |
| Sand Storm Unit 1 O-10-57903 | XTO Energy Inc. only | Spraberry (Trend Area) | Martin | 8 | 2.73M | 9.24M | Dec 2022 – Apr 2026 |
| University Waddell Devonian Unit O-10-20692 | Formentera Operations LLC only | University Waddell (Devonian) | Crane | 41 | 2.18M | 3.88M | Jan 1993 – Apr 2026 |
| Sand Hills Tubb Unit O-10-20865 | Formentera Operations LLC only | Sand Hills (Tubb) | Crane | 80 | 2.15M | 4.23M | Jan 1993 – Apr 2026 |
| Sandstorm Unit O-10-53231 | Scout Energy Management LLC only | Hoefs T-K (Wolfcamp) | Reeves | 4 | 1.94M | 2.64M | Sep 2019 – Apr 2026 |
| Barrow, Augusta O-10-43701 | Formentera Operations LLC only | Spraberry (Trend Area) | Ector | 37 | 1.79M | 4.32M | Mar 2013 – Apr 2026 |
| Norman C O-10-34848 | OXY USA WTP EOR, LLC only | Norman (Ellenburger) | Gaines | 5 | 1.45M | 515K | Nov 1995 – Apr 2026 |
| Barrow, Augusta O-10-14687 | Formentera Operations LLC only | Cowden, North | Ector | 16 | 1.45M | 69.9K | Jan 1993 – Nov 2025 |
| Ally O-10-48672 | Formentera Operations LLC only | Keystone (Wolfcamp) | Winkler | 6 | 1.37M | 1.92M | Nov 2016 – Mar 2026 |
| Formula One 9-16-21 O-10-56310 | Bayswater Operating Company LLC only | Spraberry (Trend Area) | Howard | 8 | 1.3M | 3.43M | May 2021 – Apr 2026 |
| Texas University Sec. 1 & 2 O-10-20901 | Formentera Operations LLC only | Dune | Crane | 73 | 1.29M | 651K | Jan 1993 – Apr 2026 |
| Tubb, J. B. a/C 1 O-10-5295 | Formentera Operations LLC only | Sand Hills (Tubb) | Crane | 171 | 1.26M | 18.7M | Jan 1993 – Apr 2026 |
| Tubb, J. B. a/C #1 O-10-5264 | Formentera Operations LLC only | Sand Hills (McKnight) | Crane | 154 | 1.25M | 22.5M | Jan 1993 – Apr 2026 |
| Van Norman O-11-5627 | Crossroads Operating, LLC only | Sharon Ridge (Clear Fork) | Scurry | 29 | 1.25M | 316K | Jan 1993 – Apr 2026 |
| BP A-22 O-3-26769 | Tri-C Resources, LLC only | Norman Hurd (Wilcox 3) | Tyler | 3 | 1.24M | 543K | Oct 2014 – Apr 2026 |
| Laren O-10-2130 | Formentera Operations LLC only | Goldsmith (Clear Fork) | Ector | 14 | 1.21M | 2.11M | Jan 1993 – Apr 2026 |
| Storm King Unit B 41-57 O-10-56830 | Surge Operating, LLC only | Spraberry (Trend Area) | Howard | 4 | 1.12M | 2.11M | Aug 2021 – Mar 2026 |
| Norma P1 Unit O-9-19478 | COG Operating LLC only | Spraberry (Trend Area) | Upton | 3 | 951K | 5.17M | Nov 2016 – Apr 2026 |
| Norman "B" O-10-22989 | Hilcorp Energy Company only | Norman (Devonian) | Gaines | 2 | 925K | 77.7K | Jan 1993 – Apr 2026 |
| Valyn Clara O-1-19173 | Formentera Operations LLC only | Briscoe Ranch (Eagleford) | Frio | 6 | 896K | 258K | Jul 2017 – Apr 2026 |
| Cummins, H. E. O-10-11783 | Formentera Operations LLC only | Goldsmith (Clear Fork) | Ector | 14 | 871K | 3.9M | Jan 1993 – Apr 2026 |
| State of Texas -DX- O-10-15229 | Formentera Operations LLC only | Dune | Crane | 28 | 850K | 421K | Jan 1993 – Apr 2026 |
| Stiles 1 O-14-8755 | Formentera Operations LLC only | Mills Ranch (Granite Wash Cons.) | Wheeler | 6 | 843K | 4.56M | Aug 2012 – Apr 2026 |
| Frye Ranch O-14-8521 | Le Norman Operating LLC only | Mills Ranch (Granite Wash Cons.) | Wheeler | 5 | 836K | 3.4M | Sep 2011 – Sep 2015 |
| Whiting 21 O-10-51186 | Formentera Operations LLC only | Keystone (Wolfcamp) | Winkler | 3 | 801K | 1.31M | Sep 2018 – Apr 2026 |
| Funk, Joe O-9-546 | Reformed Resources, LLC only | H-J (Strawn) | Tom Green | 20 | 801K | 467K | Jan 1993 – Apr 2026 |
| King 59 O-10-46724 | Formentera Operations LLC only | Roepke (Wolfcamp) | Crane | 3 | 785K | 950K | Jun 2014 – Apr 2026 |
| Cummins -B- O-10-12239 | Formentera Operations LLC only | Goldsmith (Clear Fork) | Ector | 27 | 784K | 1.92M | Jan 1993 – Apr 2026 |
| Walton, J. B. a/C 2 O-10-3287 | Formentera Operations LLC only | Keystone (Colby) | Winkler | 56 | 771K | 747K | Jan 1993 – Apr 2026 |
| Cormac 8-17-A O-9-20642 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) R 40 Exc | Reagan | 2 | 764K | 3.56M | Feb 2019 – Apr 2026 |
| Orms O-7-6393 | Basa Resources, Inc. only | East Texas | Gregg | 11 | 758K | 318K | Jan 1993 – Apr 2026 |
| Storm King Unit a 41-57 O-10-59952 | Surge Operating, LLC only | Spraberry (Trend Area) | Howard | 4 | 758K | 1.76M | Apr 2023 – Mar 2026 |
| Ector Fee Unit II O-10-21673 | Formentera Operations LLC only | Harper (Ellenburger) | Ector | 3 | 726K | 733K | Jan 1993 – Apr 2026 |
| Texas -W- O-10-14842 | Formentera Operations LLC only | Dune | Crane | 20 | 681K | 92.6K | Jan 1993 – Apr 2026 |
| University Lands 36 O-10-42346 | Formentera Operations LLC only | McElroy | Crane | 7 | 679K | 1.36M | Dec 2012 – Apr 2026 |
| Norman State 14 G-10-282746 | Permian Resources Operating, LLC only | Ford, West (Wolfcamp) | Culberson | 1 | 668K | 7.43M | Jan 2017 – Apr 2026 |
| Orms, L. E. O-7-7588 | Basa Resources, Inc. only | East Texas | Gregg | 11 | 653K | 316K | Jan 1993 – Apr 2026 |
| Cormac 8-17-C O-9-20732 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) R 40 Exc | Reagan | 2 | 653K | 3.88M | May 2019 – Apr 2026 |
| Sandworm State 57-3-14 Unit G-10-282728 | Anadarko E&P Onshore LLC only | Phantom (Wolfcamp) | Reeves | 1 | 642K | 3.98M | Oct 2017 – Apr 2026 |
| Mc Cormick O-3-23907 | Escondido Petroleum Company, Inc only | Brookshire | Waller | 17 | 632K | 78.6K | Nov 2000 – Apr 2026 |
| Norma Jeanne O-1-19641 | Formentera Operations LLC only | Briscoe Ranch (Eagleford) | Zavala | 3 | 622K | 294K | Jul 2018 – Apr 2026 |
| Cummins, H. E. -C- O-10-11966 | Formentera Operations LLC only | Goldsmith (Clear Fork) | Ector | 12 | 588K | 1.74M | Jan 1996 – Apr 2026 |
| Blue Estate O-10-15745 | Formentera Operations LLC only | Wheeler (Wolfcamp) | Winkler | 11 | 585K | 6.27M | Jan 1993 – Apr 2026 |
| Cormac '17-20' O-9-19804 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) R 40 Exc | Reagan | 2 | 560K | 3.65M | Sep 2017 – Apr 2026 |
| Coachwhip 25 O-10-49191 | Formentera Operations LLC only | Keystone (Wolfcamp) | Winkler | 2 | 552K | 652K | Jan 2017 – Apr 2026 |
| Whiting 28 O-10-49192 | Formentera Operations LLC only | Keystone (Wolfcamp) | Winkler | 2 | 547K | 920K | Feb 2017 – Apr 2026 |