| Halff-Amacker O-9-4996 | Civitas Permian Operating, LLC only | Willrode (Strawn 9550) | Upton | 1 | 77K | 574K | by Jan 1993 – Aug 2024 |
| McGill "71" Unit O-9-15052 | COG Operating LLC only | Amacker-Tippett, SW (Wolfcamp) | Upton | 1 | 75K | 244K | Oct 2000 – Jan 2008 |
| Windham 103 G-9-205835 | EOG Resources, Inc. only | Amacker-Tippett (Devonian) | Upton | 1 | 74.1K | 1.44M | May 2004 – Aug 2026 |
| Amacker, V. T. 61 G-9-208238 | Civitas Permian Operating, LLC only | Amacker-Tippett (Devonian) | Upton | 1 | 73.9K | 1.74M | Aug 2004 – Dec 2020 |
| R S Windham "A" G-9-207528 | EOG Resources, Inc. only | Amacker-Tippett (Devonian) | Upton | 1 | 72.6K | 2.14M | Jul 2004 – Aug 2026 |
| Sallye O-9-15076 | True Oil Company LLC only | Amacker-Tippett, SW (Wolfcamp) | Upton | 1 | 71.8K | 249K | Dec 2000 – Oct 2012 |
| Halff Estate "20" G-9-208876 | EOG Resources, Inc. only | Amacker-Tippett (Devonian) | Upton | 1 | 71.2K | 2.19M | Jan 2005 – Aug 2026 |
| Lane, J. S. O-9-4596 | Southwest Royalties, Inc. only | Amacker-Tippett, S. (Bend) | Upton | 1 | 70K | 563K | by Jan 1993 – Apr 2010 |
| Halff "18" O-9-16831 | EOG Resources, Inc. only | Amacker-Tippett, SW (Wolfcamp) | Upton | 1 | 69.8K | 66.2K | Jul 2008 – Feb 2009 |
| Amacker, V. T. 76 O-9-11918 | Civitas Permian Operating, LLC only | Amacker-Tippett (Wolfcamp Lower) | Upton | 3 | 69.8K | 361K | by Jan 1993 – Jun 2013 |
| Amacker, V. T. 62 G-9-226629 | Civitas Permian Operating, LLC only | Amacker-Tippett (Devonian) | Upton | 1 | 69.7K | 3.34M | Dec 2006 – Aug 2026 |
| Sapphire 102 Unit G-9-207159 | EOG Resources, Inc. only | Amacker-Tippett (Devonian) | Upton | 1 | 68.4K | 1.05M | Sep 2004 – Jun 2026 |
| Amacker, V. T. 78 G-9-226949 | Civitas Permian Operating, LLC only | Amacker-Tippett (Devonian) | Upton | 1 | 68.4K | 2.7M | Feb 2007 – Feb 2024 |
| Halff Estate "20" G-9-189870 | EOG Resources, Inc. only | Amacker-Tippett (Devonian) | Upton | 1 | 68.2K | 2M | May 2002 – Aug 2026 |
| Amacker, V.T. 79 G-9-215441 | Civitas Permian Operating, LLC only | Amacker-Tippett (Devonian) | Upton | 1 | 68K | 1.2M | Dec 2005 – Oct 2021 |
| Tomador "99" G-9-203495 | Summit Petroleum LLC only | Amacker-Tippett (Devonian) | Upton | 1 | 66.9K | 1.62M | Apr 2004 – Aug 2026 |
| Windham 16 G-9-191632 | EOG Resources, Inc. only | Amacker-Tippett (Devonian) | Upton | 1 | 66.8K | 1.18M | Jul 2002 – Aug 2026 |
| Jade 101 G-9-216761 | EOG Resources, Inc. only | Amacker-Tippett (Devonian) | Upton | 1 | 65.9K | 817K | May 2005 – Aug 2026 |
| Amacker "68-NE" O-9-15228 | EOG Resources, Inc. only | Amacker-Tippett, SW (Wolfcamp) | Upton | 1 | 65.5K | 271K | Mar 2002 – Mar 2004 |
| Amacker "15" O-9-11216 | Atlas Operating LLC only | Spraberry (Trend Area CL. Fk.) | Upton | 3 | 64.6K | 26.2K | by Jan 1993 – Aug 2026 |
| Cody C Unit G-9-203330 | EOG Resources, Inc. only | Amacker-Tippett (Devonian) | Upton | 1 | 63.7K | 1.66M | Mar 2004 – Aug 2026 |
| Kincaid O-9-14344 | Forest Oil Corporation only | Amacker-Tippett, S. (Wolfcamp) | Upton | 1 | 63.2K | 533K | Dec 1995 – Nov 2005 |
| Amacker Bell 99 "a" Unit G-9-207566 | EOG Resources, Inc. only | Amacker-Tippett (Devonian) | Upton | 1 | 62.3K | 773K | Dec 2004 – Nov 2022 |
| Bell "53" O-9-13794 | COG Operating LLC only | Amacker-Tippett, SE. (Strawn LM) | Upton | 2 | 61.9K | 165K | Apr 1995 – Apr 2017 |
| Peridot 101 G-9-206260 | EOG Resources, Inc. only | Amacker-Tippett (Devonian) | Upton | 1 | 59.8K | 1.15M | Jun 2004 – Sep 2020 |
| V. T. Amacker 63 O-9-18415 | Civitas Permian Operating, LLC only | Spraberry (Trend Area) | Upton | 1 | 59.1K | 228K | Oct 2013 – Jan 2025 |
| AMACKER86 O-9-15710 | COG Operating LLC only | Spraberry (Trend Area) | Upton | 1 | 58.7K | 166K | Apr 2005 – Jan 2022 |
| V. T. Amacker 105 O-9-18812 | Civitas Permian Operating, LLC only | Spraberry (Trend Area) | Upton | 2 | 58.4K | 320K | Oct 2014 – Jul 2026 |
| Amacker "46" O-9-9845 | Atlas Operating LLC only | Spraberry (Trend Area CL. Fk.) | Upton | 5 | 58.2K | 143K | by Jan 1993 – Aug 2026 |
| Amacker, V. T. 62 G-9-211767 | Civitas Permian Operating, LLC only | Amacker-Tippett (Devonian) | Upton | 1 | 58K | 1.93M | Jun 2005 – Aug 2026 |
| Amacker, V. T. 105 G-9-232097 | Civitas Permian Operating, LLC only | Amacker-Tippett (Devonian) | Upton | 1 | 57.7K | 6.42M | Jul 2007 – Aug 2026 |
| Emily H G-9-209118 | Summit Petroleum LLC only | Amacker-Tippett (Devonian) | Upton | 1 | 55.6K | 580K | Feb 2005 – Sep 2017 |
| Amacker, V. T. 105 G-9-239030 | Civitas Permian Operating, LLC only | Amacker-Tippett (Devonian) | Upton | 1 | 55.5K | 5.98M | Feb 2008 – Aug 2026 |
| Windham, R.S. O-9-13646 | XTO Energy Inc. only | Barnet-Amacker (Fusselman) | Upton | 2 | 55.4K | 1.39M | Jul 1994 – Jul 2004 |
| Amacker, V. T. 63 G-9-246388 | Civitas Permian Operating, LLC only | Amacker-Tippett (Devonian) | Upton | 1 | 54.8K | 1.77M | Mar 2008 – May 2024 |
| Isabella O-9-14956 | Summit Petroleum LLC only | Amacker-Tippett, SW (Wolfcamp) | Upton | 1 | 54.6K | 103K | Jan 2000 – Oct 2021 |
| Amacker "65" NE O-9-15073 | EOG Resources, Inc. only | Amacker-Tippett, SW (Wolfcamp) | Upton | 1 | 53.8K | 406K | Nov 2000 – Jun 2002 |
| V.T. Amacker 105 G-9-221387 | Civitas Permian Operating, LLC only | Amacker-Tippett (Devonian) | Upton | 1 | 50.1K | 4.47M | Sep 2006 – May 2022 |
| Weir, George 14 B G-9-204385 | EOG Resources, Inc. only | Amacker-Tippett (Devonian) | Upton | 1 | 49.6K | 462K | Nov 2002 – Aug 2026 |
| Halff-Amacker O-9-11757 | Civitas Permian Operating, LLC only | Willrode (Wolfcamp) | Upton | 1 | 48.1K | 108K | by Jan 1993 – Nov 2019 |
| Amacker, V. T. 105 O-9-14758 | Hunt Oil Company only | Amacker-Tippett, N. (Wolfcamp) | Upton | 1 | 48K | 1.06M | May 1998 – Sep 2004 |
| Amacker, V. T. 62 G-9-209115 | Civitas Permian Operating, LLC only | Amacker-Tippett (Devonian) | Upton | 1 | 47.9K | 2.34M | Oct 2004 – Mar 2020 |
| Amacker, V. T. "62" O-9-13198 | Civitas Permian Operating, LLC only | Amacker-Tippett (Devonian) | Upton | 3 | 47.2K | 966K | by Jan 1993 – May 2024 |
| Zircon 100 G-9-210675 | EOG Resources, Inc. only | Amacker-Tippett (Devonian) | Upton | 1 | 47.1K | 817K | Apr 2005 – Aug 2026 |
| Amacker, V. T. 105 G-9-250475 | Civitas Permian Operating, LLC only | Amacker-Tippett (Devonian) | Upton | 1 | 46.3K | 4.71M | Jun 2009 – Feb 2024 |
| Hayden O-9-16622 | COG Operating LLC only | Amacker-Tippett, SW (Wolfcamp) | Upton | 2 | 46.2K | 330 | Feb 2009 – Nov 2021 |
| Shirk, Mary K. O-9-4326 | Southwest Royalties, Inc. only | Amacker-Tippett, S. (Bend) | Upton | 3 | 45.6K | 252K | by Jan 1993 – Jun 2026 |
| Amacker O-9-9581 | Oilfield Management, Inc. (A) only | Amacker-Tippett, SW (Wolfcamp) | Upton | 1 | 45.4K | 120K | by Jan 1993 – May 2012 |
| Amacker "99" G-9-196961 | EOG Resources, Inc. only | Amacker-Tippett (Devonian) | Upton | 1 | 45.1K | 1.01M | Apr 2003 – Aug 2026 |
| Adams "101" O-9-15246 | Thompson, J. Cleo only | Amacker-Tippett, SW (Wolfcamp) | Upton | 1 | 44.9K | 331K | Apr 2002 – Feb 2007 |