| XBC Giddings Estate O-9-16349 | Pioneer Natural Res. USA, Inc. | Spraberry (Trend Area) | Upton | 420 | 43.6M | 150M | May 2007 – Apr 2026 |
| XBC Giddings Estate R40 O-9-18718 | Pioneer Natural Res. USA, Inc. | Spraberry (Trend Area) R 40 Exc | Upton | 8 | 1.9M | 5.19M | Jun 2014 – Apr 2026 |
| Giddings Estate Fee O-9-11402 | Pioneer Natural Res. USA, Inc. | Spraberry (Trend Area) | Upton | 88 | 1.75M | 5.17M | Jan 1993 – Apr 2005 |
| XBC Giddings Estate C O-9-16483 | Pioneer Natural Res. USA, Inc. | Spraberry (Trend Area) | Upton | 20 | 1.6M | 3.49M | Nov 2007 – Apr 2026 |
| XBC Giddings Estate B O-9-17101 | Pioneer Natural Res. USA, Inc. | Spraberry (Trend Area) | Upton | 17 | 1.33M | 3.01M | Mar 2010 – Apr 2026 |
| XBC Giddings Estate A O-9-16409 | Pioneer Natural Res. USA, Inc. | Spraberry (Trend Area) | Upton | 15 | 885K | 2.02M | Dec 2007 – Mar 2021 |
| XBC Giddings Estate D O-9-16572 | Pioneer Natural Res. USA, Inc. | Spraberry (Trend Area) | Upton | 15 | 821K | 1.22M | Dec 2007 – Apr 2026 |
| XBC Giddings Estate 434E O-9-19704 | Pioneer Natural Res. USA, Inc. | Spraberry (Trend Area) | Upton | 1 | 527K | 2.07M | Dec 2017 – Oct 2025 |
| XBC Giddings Estate 434G O-9-19836 | Pioneer Natural Res. USA, Inc. | Spraberry (Trend Area) | Upton | 1 | 521K | 2.34M | Dec 2017 – Oct 2025 |
| XBC Giddings Estate 434F O-9-19782 | Pioneer Natural Res. USA, Inc. | Spraberry (Trend Area) | Upton | 1 | 510K | 2.35M | Dec 2017 – Apr 2026 |
| XBC Giddings Estate N O-9-19142 | Pioneer Natural Res. USA, Inc. | Spraberry (Trend Area) | Upton | 1 | 413K | 1.22M | Aug 2015 – Apr 2026 |
| XBC Giddings Estate M O-9-19167 | Pioneer Natural Res. USA, Inc. | Spraberry (Trend Area) | Upton | 1 | 378K | 1.08M | Sep 2015 – Feb 2026 |
| Giddings Estate Fee 'F' O-9-15718 | Pioneer Natural Res. USA, Inc. | Spraberry (Trend Area) | Upton | 51 | 329K | 555K | May 2005 – Aug 2011 |
| XBC Giddings Estate 434C O-9-19872 | Pioneer Natural Res. USA, Inc. | Spraberry (Trend Area) | Upton | 1 | 312K | 1.41M | Nov 2017 – Oct 2025 |
| XBC Giddings Estate K O-9-19149 | Pioneer Natural Res. USA, Inc. | Spraberry (Trend Area) | Upton | 1 | 262K | 853K | Aug 2015 – Apr 2026 |
| XBC Giddings Estate 434D O-9-19833 | Pioneer Natural Res. USA, Inc. | Spraberry (Trend Area) | Upton | 1 | 247K | 1.05M | Nov 2017 – Oct 2025 |
| XBC Giddings Estate I O-9-18704 | Pioneer Natural Res. USA, Inc. | Spraberry (Trend Area) | Upton | 1 | 180K | 401K | Aug 2014 – Apr 2026 |
| XBC Giddings Estate G O-9-18697 | Pioneer Natural Res. USA, Inc. | Spraberry (Trend Area) | Upton | 1 | 175K | 374K | Sep 2014 – Apr 2026 |
| XBC Giddings Estate F O-9-18699 | Pioneer Natural Res. USA, Inc. | Spraberry (Trend Area) | Upton | 1 | 172K | 469K | Sep 2014 – Apr 2026 |
| XBC Giddings Estate H O-9-18700 | Pioneer Natural Res. USA, Inc. | Spraberry (Trend Area) | Upton | 1 | 154K | 362K | Aug 2014 – Apr 2026 |
| XBC Giddings Estate L O-9-19141 | Pioneer Natural Res. USA, Inc. | Spraberry (Trend Area) | Upton | 1 | 150K | 550K | Aug 2015 – Apr 2026 |
| XBC Giddings Estate J O-9-18698 | Pioneer Natural Res. USA, Inc. | Spraberry (Trend Area) | Upton | 1 | 106K | 264K | Aug 2014 – Apr 2026 |
| Fasken State O-10-31622 | Pioneer Natural Res. USA, Inc. | Spraberry (Trend Area) | Midland | 1 | 104K | 237K | Jan 1993 – Apr 2026 |
| Giddings Estate Fee 'C' O-9-15715 | Pioneer Natural Res. USA, Inc. | Spraberry (Trend Area) | Upton | 19 | 80.7K | 189K | May 2005 – Aug 2011 |
| Halff Estate -D- O-9-7655 | Pioneer Natural Res. USA, Inc. | Old Upland (Bend) | Upton | 1 | 54K | 135K | Jan 1993 – Apr 2026 |
| Willey Estate O-10-38843 | Pioneer Natural Res. USA, Inc. | Spraberry (Trend Area) | Martin | 1 | 45.9K | 41.2K | May 2008 – Feb 2023 |
| Connell Estate O-9-8341 | Pioneer Natural Res. USA, Inc. | Spraberry (Trend Area) | Upton | 2 | 36.1K | 171K | Jan 1993 – May 2018 |
| State "R" O-9-12654 | Pioneer Natural Res. USA, Inc. | Spraberry (Trend Area) | Reagan | 2 | 33.3K | 181K | Jan 1993 – Feb 2012 |
| Halff Estate "D" O-9-16222 | Pioneer Natural Res. USA, Inc. | Spraberry (Trend Area) | Upton | 1 | 32.7K | 79.8K | Apr 2007 – Apr 2026 |
| White Estate O-10-21075 | Pioneer Natural Res. USA, Inc. | Spraberry (Trend Area) | Martin | 2 | 31.2K | 47.5K | Jan 1993 – Nov 2013 |
| State "L" O-9-12082 | Pioneer Natural Res. USA, Inc. | Spraberry (Trend Area) | Reagan | 1 | 28.7K | 245K | Jan 1993 – Dec 2016 |
| Halff Estate 26 O-9-7999 | Pioneer Natural Res. USA, Inc. | Old Upland (Bend) | Upton | 1 | 27.7K | 46.3K | Jan 1993 – Jan 2022 |
| Greer Estate O-9-4589 | Pioneer Natural Res. USA, Inc. | Spraberry (Trend Area) | Reagan | 3 | 26.5K | 976K | Jan 1993 – Apr 2026 |
| Halff Estate "26" O-9-16281 | Pioneer Natural Res. USA, Inc. | Spraberry (Trend Area) | Upton | 2 | 24.2K | 94.6K | Apr 2007 – Apr 2026 |
| State "F" O-9-11743 | Pioneer Natural Res. USA, Inc. | Spraberry (Trend Area) | Reagan | 1 | 20.7K | 219K | Jan 1993 – Nov 2013 |
| Giddings Estate Fee 'A' O-9-15713 | Pioneer Natural Res. USA, Inc. | Spraberry (Trend Area) | Upton | 3 | 19.5K | 49K | May 2005 – May 2015 |
| State "O" O-9-12963 | Pioneer Natural Res. USA, Inc. | Spraberry (Trend Area) | Reagan | 1 | 19.2K | 122K | Jan 1993 – Jan 2019 |
| Halff Estate "42" O-9-9297 | Pioneer Natural Res. USA, Inc. | Spraberry (Trend Area) | Reagan | 1 | 16.6K | 76.9K | Jan 1993 – Jul 2021 |
| Trees State 50 O-10-38079 | Pioneer Natural Res. USA, Inc. | Trees Ranch (Detrital) | Pecos | 1 | 15.3K | 131K | Nov 2006 – Aug 2014 |
| Merchant Estate O-9-4593 | Pioneer Natural Res. USA, Inc. | Spraberry (Trend Area) | Reagan | 1 | 15K | 206K | Jan 1993 – Feb 2016 |
| Fasken, A., Estate O-10-24504 | Pioneer Natural Res. USA, Inc. | Azalea (Devonian) | Midland | 1 | 13.7K | 351K | Jan 1993 – Aug 2023 |
| State "N" O-9-12529 | Pioneer Natural Res. USA, Inc. | Spraberry (Trend Area) | Reagan | 1 | 13.6K | 60.5K | Jan 1993 – Sep 2008 |
| State "T" O-9-12894 | Pioneer Natural Res. USA, Inc. | Spraberry (Trend Area) | Reagan | 1 | 13.5K | 59.3K | Jan 1993 – Jun 2004 |
| Midkiff Estate O-10-31389 | Pioneer Natural Res. USA, Inc. | Midkiff (Atoka Lime) | Midland | 1 | 13.1K | 581K | Jan 1993 – Jan 2017 |
| State "K" O-9-12073 | Pioneer Natural Res. USA, Inc. | Spraberry (Trend Area) | Reagan | 1 | 11.9K | 124K | Jan 1993 – Dec 2016 |
| Melnar, Fred Estate Unit G-2-107451 | Pioneer Natural Res. USA, Inc. | Word (Edwards) | Lavaca | 1 | 11.3K | 496K | Jan 1993 – Dec 2016 |
| Neal Estate "36-A" G-9-200440 | Pioneer Natural Res. USA, Inc. | Benedum (Devonian, Gas) | Upton | 1 | 11K | 778K | Oct 2002 – Apr 2026 |
| Giddings Estate Fee 'D' O-9-15716 | Pioneer Natural Res. USA, Inc. | Spraberry (Trend Area) | Upton | 4 | 9.65K | 16.5K | Aug 2005 – Jul 2011 |
| Giddings Estate Fee 'B' O-9-15714 | Pioneer Natural Res. USA, Inc. | Spraberry (Trend Area) | Upton | 1 | 7.44K | 13.3K | Oct 2005 – Aug 2011 |
| State/Slick G-4-162159 | Pioneer Natural Res. USA, Inc. | Flores (Vicksburg, Lower) | Starr | 1 | 121 | 104K | Apr 1997 – Nov 1997 |