| TXL South Unit O-10-20726 | Formentera Operations LLC | TXL (Tubb) | Ector | 718 | 21.3M | 42.2M | Jan 1993 – Jul 2026 |
| TXL North Unit O-10-20487 | Formentera Operations LLC | TXL (Tubb) | Ector | 496 | 13.9M | 40.3M | Jan 1993 – Jul 2026 |
| Goldsmith-Cummins /Deep/ Unit O-10-20543 | Formentera Operations LLC | Goldsmith (Clear Fork) | Ector | 396 | 10.2M | 28.1M | Jan 1993 – Jul 2026 |
| Hausser O-1-17183 | Formentera Operations LLC | Briscoe Ranch (Eagleford) | Frio | 39 | 6.83M | 2.48M | Jul 2013 – Jul 2026 |
| University Waddell Devonian Unit O-10-20692 | Formentera Operations LLC | University Waddell (Devonian) | Crane | 41 | 2.18M | 3.88M | Jan 1993 – Jul 2026 |
| Sand Hills Tubb Unit O-10-20865 | Formentera Operations LLC | Sand Hills (Tubb) | Crane | 80 | 2.15M | 4.23M | Jan 1993 – Jul 2026 |
| Barrow, Augusta O-10-43701 | Formentera Operations LLC | Spraberry (Trend Area) | Ector | 37 | 1.79M | 4.32M | Mar 2013 – Jul 2026 |
| Barrow, Augusta O-10-14687 | Formentera Operations LLC | Cowden, North | Ector | 16 | 1.45M | 69.9K | Jan 1993 – Jul 2026 |
| Ally O-10-48672 | Formentera Operations LLC | Keystone (Wolfcamp) | Winkler | 6 | 1.37M | 1.92M | Nov 2016 – Jul 2026 |
| Texas University Sec. 1 & 2 O-10-20901 | Formentera Operations LLC | Dune | Crane | 73 | 1.29M | 651K | Jan 1993 – Jul 2026 |
| Tubb, J. B. a/C 1 O-10-5295 | Formentera Operations LLC | Sand Hills (Tubb) | Crane | 171 | 1.26M | 18.7M | Jan 1993 – Jul 2026 |
| Tubb, J. B. a/C #1 O-10-5264 | Formentera Operations LLC | Sand Hills (McKnight) | Crane | 154 | 1.25M | 22.5M | Jan 1993 – Jul 2026 |
| Laren O-10-2130 | Formentera Operations LLC | Goldsmith (Clear Fork) | Ector | 14 | 1.21M | 2.11M | Jan 1993 – Jul 2026 |
| Valyn Clara O-1-19173 | Formentera Operations LLC | Briscoe Ranch (Eagleford) | Frio | 6 | 896K | 258K | Jul 2017 – Jul 2026 |
| Cummins, H. E. O-10-11783 | Formentera Operations LLC | Goldsmith (Clear Fork) | Ector | 14 | 871K | 3.9M | Jan 1993 – Jul 2026 |
| State of Texas -DX- O-10-15229 | Formentera Operations LLC | Dune | Crane | 28 | 850K | 421K | Jan 1993 – Jul 2026 |
| Stiles 1 O-14-8755 | Formentera Operations LLC | Mills Ranch (Granite Wash Cons.) | Wheeler | 6 | 843K | 4.56M | Aug 2012 – Jul 2026 |
| Whiting 21 O-10-51186 | Formentera Operations LLC | Keystone (Wolfcamp) | Winkler | 3 | 801K | 1.31M | Sep 2018 – Jul 2026 |
| King 59 O-10-46724 | Formentera Operations LLC | Roepke (Wolfcamp) | Crane | 3 | 785K | 950K | Jun 2014 – Jul 2026 |
| Cummins -B- O-10-12239 | Formentera Operations LLC | Goldsmith (Clear Fork) | Ector | 27 | 784K | 1.92M | Jan 1993 – Jul 2026 |
| Walton, J. B. a/C 2 O-10-3287 | Formentera Operations LLC | Keystone (Colby) | Winkler | 56 | 771K | 747K | Jan 1993 – Jul 2026 |
| Ector Fee Unit II O-10-21673 | Formentera Operations LLC | Harper (Ellenburger) | — | 3 | 726K | 733K | Jan 1993 – Jul 2026 |
| Texas -W- O-10-14842 | Formentera Operations LLC | Dune | Crane | 20 | 681K | 92.6K | Jan 1993 – Jul 2026 |
| University Lands 36 O-10-42346 | Formentera Operations LLC | McElroy | Crane | 7 | 679K | 1.36M | Aug 2012 – Jul 2026 |
| Norma Jeanne O-1-19641 | Formentera Operations LLC | Briscoe Ranch (Eagleford) | Zavala | 3 | 622K | 294K | Jul 2018 – Jul 2026 |
| Cummins, H. E. -C- O-10-11966 | Formentera Operations LLC | Goldsmith (Clear Fork) | Ector | 12 | 588K | 1.74M | Jan 1993 – Jul 2026 |
| Blue Estate O-10-15745 | Formentera Operations LLC | Wheeler (Wolfcamp) | Winkler | 11 | 585K | 6.27M | Jan 1993 – Jul 2026 |
| Coachwhip 25 O-10-49191 | Formentera Operations LLC | Keystone (Wolfcamp) | Winkler | 2 | 552K | 652K | Jan 2017 – Jul 2026 |
| Whiting 28 O-10-49192 | Formentera Operations LLC | Keystone (Wolfcamp) | Winkler | 2 | 547K | 920K | Feb 2017 – Jul 2026 |
| Ally 26 O-10-46953 | Formentera Operations LLC | Keystone (Wolfcamp) | Winkler | 2 | 545K | 1.47M | Nov 2014 – Jul 2026 |
| University -42- O-10-27091 | Formentera Operations LLC | Block 31 (Devonian) | Crane | 5 | 542K | 694K | Jan 1993 – Jul 2026 |
| Block 9 Unit O-10-20417 | Formentera Operations LLC | Cowden, North | Andrews | 23 | 514K | 64.8K | Jan 1993 – Jul 2026 |
| Waddell O-10-23120 | Formentera Operations LLC | Keystone (San Andres) | Winkler | 30 | 502K | 1.14M | Jan 1993 – Jul 2026 |
| Waddell Bros & Co O-10-33426 | Formentera Operations LLC | A. W. (Devonian) | Winkler | 5 | 480K | 751K | Jan 1993 – Jul 2025 |
| Whiting 22 O-10-49193 | Formentera Operations LLC | Keystone (Wolfcamp) | Winkler | 2 | 435K | 514K | Jun 2017 – Jul 2026 |
| Rust 24 O-10-54505 | Formentera Operations LLC | Keystone (Wolfcamp) | Winkler | 2 | 424K | 1.3M | Aug 2019 – Jul 2026 |
| Dunes O-10-49194 | Formentera Operations LLC | Keystone (Wolfcamp) | Winkler | 2 | 389K | 314K | Sep 2017 – Jul 2026 |
| Waddell Bros. & Co. O-10-10687 | Formentera Operations LLC | Circle 2 (Fusselman) | Winkler | 3 | 378K | 437K | Jan 1993 – May 2025 |
| Holdsworth Unit A O-1-19084 | Formentera Operations LLC | Briscoe Ranch (Eagleford) | Zavala | 3 | 368K | 157K | Dec 2016 – Jul 2026 |
| V-Bar 15 O-10-49993 | Formentera Operations LLC | Keystone (Wolfcamp) | Winkler | 2 | 360K | 215K | Aug 2017 – Jul 2026 |
| Stiles 3 O-14-8776 | Formentera Operations LLC | Mills Ranch (Granite Wash Cons.) | Wheeler | 6 | 358K | 3.43M | Sep 2012 – Jul 2026 |
| Fernandes Glo 18 O-10-49190 | Formentera Operations LLC | Keystone (Wolfcamp) | Winkler | 2 | 358K | 1.05M | Feb 2017 – Jul 2026 |
| Southern Unit O-10-22613 | Formentera Operations LLC | Running W (Waddell) | Crane | 55 | 356K | 153K | Jan 1993 – Jul 2026 |
| Campbell O-10-48651 | Formentera Operations LLC | Keystone (Wolfcamp) | Winkler | 2 | 335K | 1.47M | Sep 2016 – Jul 2026 |
| Stonegate 15 O-10-52784 | Formentera Operations LLC | Keystone (Wolfcamp) | Winkler | 1 | 334K | 230K | Jul 2018 – Jul 2026 |
| State Walton -E- O-10-3264 | Formentera Operations LLC | Kermit (Ellenburger) | Winkler | 3 | 332K | 6.88M | Jan 1993 – Jul 2026 |
| Nelson Unit A O-1-18877 | Formentera Operations LLC | Briscoe Ranch (Eagleford) | Dimmit | 2 | 301K | 574K | May 2016 – Jul 2026 |
| Tubb, J. B. "F" O-10-24214 | Formentera Operations LLC | Sand Hills (Judkins) | Crane | 17 | 295K | 4.28M | Jan 1993 – Jul 2026 |
| Bruce and Bar A55A56-2303 O-10-50596 | Formentera Operations LLC | Emperor (Woodford Shale) | Winkler | 1 | 291K | 120K | May 2017 – Jul 2026 |
| Tubb, J. B. a/C 2 O-10-5296 | Formentera Operations LLC | Sand Hills (Tubb) | Crane | 24 | 289K | 2.63M | Jan 1993 – Jul 2026 |