| Fee "BK" O-10-43440 | Fasken Oil and Ranch, Ltd. only | Spraberry (Trend Area) | Ector | 74 | 4.98M | 14.8M | Dec 2012 – Apr 2026 |
| Fee 'BL' O-10-44349 | Fasken Oil and Ranch, Ltd. only | Spraberry (Trend Area) | Ector | 62 | 4.24M | 18.7M | Oct 2013 – Apr 2026 |
| Fee 'BQ' O-10-47041 | Fasken Oil and Ranch, Ltd. only | Spraberry (Trend Area) | Andrews | 45 | 2.95M | 13.4M | Oct 2015 – Apr 2026 |
| Fee 'BJ' O-10-47876 | Fasken Oil and Ranch, Ltd. only | Spraberry (Trend Area) | Ector | 48 | 2.59M | 11.7M | Jul 2016 – Apr 2026 |
| Fee "BI" O-10-42295 | Fasken Oil and Ranch, Ltd. only | Spraberry (Trend Area) | Ector | 24 | 1.7M | 7M | Feb 2012 – Apr 2026 |
| Fee 'BC' O-10-44386 | Fasken Oil and Ranch, Ltd. only | Spraberry (Trend Area) | Ector | 24 | 1.64M | 5.48M | Sep 2013 – Apr 2026 |
| Fee "BB" O-10-42344 | Fasken Oil and Ranch, Ltd. only | Spraberry (Trend Area) | Ector | 24 | 1.41M | 4.71M | Feb 2012 – Apr 2026 |
| Fee "BD" O-10-42591 | Fasken Oil and Ranch, Ltd. only | Spraberry (Trend Area) | Ector | 19 | 1.12M | 4.39M | Apr 2012 – Apr 2026 |
| Fasken -19- O-10-32374 | Fasken Oil and Ranch, Ltd. only | Fasken, South (Wolfcamp) | Ector | 1 | 551K | 980K | Jan 1993 – Apr 2026 |
| Fasken, David -CH- O-10-28929 | Occidental Permian Ltd. only | Cowden, North | Andrews | 13 | 540K | 314K | Jan 1993 – Apr 2026 |
| Fasken Unit -14- O-10-15379 | Fasken Oil and Ranch, Ltd. only | Fasken, S. (Fusselman) | Ector | 6 | 478K | 2.73M | Jan 1993 – Apr 2026 |
| Fasken Operating Area -B- O-10-17204 | Fasken Oil and Ranch, Ltd. only | Circle Bar (Ellen) | Ector | 1 | 350K | 452K | Jan 1993 – Apr 2026 |
| Fee "AH" O-10-36973 | Fasken Oil and Ranch, Ltd. only | Cowden, North | Ector | 3 | 223K | 13.3K | Nov 2002 – Apr 2026 |
| Fasken -G-45- O-10-17704 | Fasken Oil and Ranch, Ltd. only | Circle Bar (Ellen) | Ector | 1 | 214K | 512K | Jan 1993 – Nov 2023 |
| Mrs. T. B. Roberts R/a -A- O-10-29630 | Formentera Operations LLC only | Fasken (Penn.) | Ector | 2 | 148K | 1.21M | Jan 1993 – Apr 2026 |
| Fasken -S-13- O-10-18790 | Apache Corporation only | Fasken, S. (Atoka) | Ector | 2 | 107K | 452K | Jan 1993 – Dec 2015 |
| Fee "AU" O-10-38914 | Fasken Oil and Ranch, Ltd. only | Spraberry (Trend Area) | Ector | 2 | 105K | 222K | Aug 2008 – Apr 2026 |
| Midland Farms -AJ- O-10-25660 | Fasken Oil and Ranch, Ltd. only | Fasken (Wolfcamp, North) | Ector | 2 | 105K | 199K | Jan 1993 – Dec 2023 |
| Fee "ZF" O-10-29636 | Fasken Oil and Ranch, Ltd. only | Cowden, North | Ector | 1 | 83.8K | 38.9K | Jan 1993 – Mar 2026 |
| Fasken Unit "14" O-10-29300 | Apache Corporation only | Fasken, South (Wolfcamp) | Ector | 2 | 68.6K | 212K | Jan 1993 – Oct 2005 |
| Fasken, David -AV- O-10-29403 | Apache Corporation only | Circle Bar (Devonian) | Ector | 1 | 62.6K | 834K | Jan 1993 – Oct 2009 |
| Fasken "20" O-10-29325 | Fasken Oil and Ranch, Ltd. only | Fasken, S. (Atoka) | Ector | 2 | 59.6K | 83.5K | Jan 1993 – Jan 2026 |
| Fasken, David -AV- O-10-30710 | Apache Corporation only | Circle Bar (Fusselman) | Ector | 1 | 57.7K | 587K | Jan 1993 – Dec 2010 |
| Fasken, David -BV- O-10-27835 | Fasken Oil and Ranch, Ltd. only | Fasken, South (Wolfcamp) | Ector | 1 | 47.6K | 47.4K | Jan 1993 – Feb 2026 |
| Fasken, David "BE" O-10-24164 | Fasken Oil and Ranch, Ltd. only | Fasken (Penn.) | Ector | 2 | 40.7K | 374K | Jan 1993 – Nov 2022 |
| Arco-Hugh Corrigan O-10-30497 | Formentera Operations LLC only | Fasken (Penn.) | Ector | 1 | 39.8K | 61.1K | Jan 1993 – Sep 2011 |
| Midland Farms Company -E- O-10-30059 | Fasken Oil and Ranch, Ltd. only | Fasken (Penn.) | Ector | 4 | 38.1K | 422K | Jan 1993 – Jun 2021 |
| Fasken, David -BH- O-10-27399 | Fasken Oil and Ranch, Ltd. only | Fasken, South (Wolfcamp) | Ector | 1 | 36.6K | 94K | Jan 1993 – Mar 2026 |
| Fasken, David -BG- O-10-25672 | Fasken Oil and Ranch, Ltd. only | Fasken, S. (Atoka) | Ector | 2 | 36.6K | 408K | Jan 1993 – Dec 2015 |
| Fee -ZG- O-10-28802 | Fasken Oil and Ranch, Ltd. only | Fasken (Penn.) | Ector | 10 | 36.5K | 1.26M | Jan 1993 – Jan 2020 |
| Fasken, David -BF- O-10-25143 | Apache Corporation only | Fasken, S. (Atoka) | Ector | 1 | 32.1K | 14.1K | Jan 1993 – Mar 2010 |
| Holt O-10-50300 | OXY USA Inc. only | Fasken (Penn.) | Ector | 1 | 30.9K | 8.58K | May 2018 – Dec 2025 |
| Fasken, David -BK- O-10-27355 | Fasken Oil and Ranch, Ltd. only | Fasken, South (Wolfcamp) | Ector | 1 | 30K | 23.4K | Jan 1993 – Feb 2026 |
| Fee 'BL' O-10-49317 | Fasken Oil and Ranch, Ltd. only | Lowe, West (Strawn) | Ector | 1 | 29.3K | 133K | Nov 2017 – Mar 2022 |
| Fee "ZG" O-10-36944 | Fasken Oil and Ranch, Ltd. only | Fasken (Wolfcamp) | Ector | 1 | 26.1K | 96.9K | Sep 2002 – Jan 2021 |
| Midland Farms Company O-10-29508 | Fasken Oil and Ranch, Ltd. only | Fasken (Penn.) | Ector | 2 | 22.5K | 324K | Jan 1993 – Jul 2024 |
| Fasken Operating Area -B- O-10-31587 | Apache Corporation only | Circle Bar (Fusselman) | Ector | 1 | 20K | 55.3K | Jan 1993 – Apr 2006 |
| Fasken, David -BJ- O-10-26213 | Slant Operating, LLC only | Fasken, S. (Atoka) | Ector | 1 | 19K | 484K | Jan 1993 – Oct 2021 |
| Fasken -32- O-10-27968 | Endeavor Energy Resources L.P. only | Circle Bar, East (Atoka) | Ector | 1 | 18.9K | 87.7K | Jan 1993 – Jul 2023 |
| Fasken Unit 14 O-10-47836 | Fasken Oil and Ranch, Ltd. only | Fasken, South (Wolfcamp) | Ector | 1 | 17K | 82.5K | Jul 2016 – Aug 2021 |
| Midland Farms -AV- O-10-20818 | Apache Corporation only | Fasken (Penn.) | Ector | 3 | 14.8K | 31.6K | Jan 1993 – Nov 2006 |
| Phillips-Midland National Bank O-10-30554 | Apache Corporation only | Fasken (Wolfcamp, North) | Ector | 1 | 14.8K | 16.4K | Jan 1993 – Jul 1998 |
| David Fasken -By- O-10-27919 | Fasken Oil and Ranch, Ltd. only | Fasken (Penn.) | Ector | 1 | 14.6K | 149K | Jan 1993 – May 2025 |
| Fasken, David -BG- O-10-48060 | Fasken Oil and Ranch, Ltd. only | Fasken, South (Strawn) | Ector | 1 | 13.4K | 25K | Dec 2015 – Apr 2026 |
| Fasken Estate O-10-37402 | Fasken Oil and Ranch, Ltd. only | Circle Bar, East (Atoka) | Ector | 1 | 12.7K | 333K | Jun 2004 – Dec 2019 |
| Fasken, David -AM- O-10-32776 | Apache Corporation only | Fasken, South (Wolfcamp) | Ector | 1 | 12.1K | 457K | Jan 1993 – Feb 1999 |
| Fasken, David -BF- O-10-40328 | Fasken Oil and Ranch, Ltd. only | Fasken, South (Wolfcamp) | Ector | 1 | 11.7K | 7.38K | Apr 2010 – Dec 2023 |
| Fasken Unit -14- O-10-40273 | Fasken Oil and Ranch, Ltd. only | Fasken, South (Strawn) | Ector | 1 | 11.7K | 224K | Jul 2010 – Apr 2026 |
| Fasken, David (CI) O-10-28772 | Occidental Permian Ltd. only | Cowden, North | Ector | 1 | 10.2K | 19K | Jan 1993 – Jul 2016 |
| Midland Farms -AJ- O-10-9162 | Apache Corporation only | Fasken (Penn.) | Ector | 3 | 6.53K | 16.4K | Jan 1993 – Jan 1997 |