| West Welch Unit O-11-14783 | OXY USA WTP EOR, LLC only | Welch | Dawson | 687 | 20.4M | 7.45M | Jan 1993 – Apr 2026 |
| South Welch Unit O-11-60337 | OXY USA WTP EOR, LLC only | Welch | Dawson | 274 | 12.8M | 43.7M | Jan 1993 – Apr 2026 |
| Welch North Unit O-11-19573 | White Rock Oil & Gas, LLC only | Welch | Dawson | 293 | 9.43M | 1.77M | Jan 1993 – Apr 2026 |
| Welch, SE (Spraberry) Bep Unit O-11-67467 | Fasken Oil and Ranch, Ltd. only | Welch, SE. (Spraberry) | Dawson | 10 | 1.67M | 161K | Nov 1995 – Apr 2026 |
| Welch O-3-23167 | Jay Management Company, LLC only | Esperson Dome (Vicksburg) | Liberty | 3 | 1.08M | 459K | Feb 1997 – Apr 2026 |
| Welch Trust 8-7-E O-9-20376 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Reagan | 2 | 852K | 3.83M | Mar 2019 – Apr 2026 |
| Welch Northeast Unit O-11-60301 | Three Span Oil & Gas, Inc. only | Welch | Lynn | 41 | 723K | 14.5K | Jan 1993 – Apr 2026 |
| Welch, SE (Spraberry) Unit O-11-62614 | Libertad Operating LLC only | Welch, SE. (Spraberry) | Dawson | 25 | 581K | 54.2K | Jan 1993 – Mar 2026 |
| Welch Foundation O-3-23221 | Jay Management Company, LLC only | Esperson Dome (Vicksburg) | Liberty | 3 | 576K | 248K | May 1997 – Apr 2026 |
| White O-11-65120 | Burk Royalty Co., Ltd. only | Welch | Terry | 18 | 576K | 49.7K | Jan 1993 – Apr 2026 |
| Welch-Cox W39G O-10-58834 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Martin | 1 | 478K | 758K | Feb 2023 – Apr 2026 |
| Crawford-Welchest 27E O-10-61974 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Midland | 1 | 393K | 979K | Oct 2024 – Apr 2026 |
| Welch-Cox W39P O-10-58342 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Martin | 1 | 379K | 667K | Feb 2023 – Apr 2026 |
| Faught O-11-65928 | Beach Exploration, Inc. only | Welch | Terry | 4 | 375K | 20 | Jan 1993 – Apr 2026 |
| Welch-Cox E39B O-10-59855 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Martin | 1 | 369K | 704K | Oct 2023 – Apr 2026 |
| Cochran, N. P. O-11-18403 | Winn Operating, LLC only | Welch | Dawson | 14 | 363K | 151 | Jan 1993 – Apr 2026 |
| Welch 39 O-10-43939 | Oxyrock Operating, LLC only | Spraberry (Trend Area) | Martin | 4 | 357K | 1.26M | May 2013 – Apr 2026 |
| Welch-Cox W39I O-10-58752 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Martin | 1 | 354K | 467K | Feb 2023 – Apr 2026 |
| Welch-Cox E39T O-10-60106 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Martin | 1 | 347K | 521K | Oct 2023 – Apr 2026 |
| Welch-Cox W39K O-10-58500 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Martin | 1 | 335K | 726K | Jan 2023 – Apr 2026 |
| Nystel, J. P. "B" O-11-64469 | R3 Operating Corporation only | Welch | Terry | 9 | 324K | 36.5K | Jan 1993 – Apr 2026 |
| Crawford-Welchest 27F O-10-61846 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Midland | 1 | 323K | 724K | Oct 2024 – Apr 2026 |
| Welch-Cox W39J O-10-58702 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Martin | 1 | 322K | 917K | Jan 2023 – Apr 2026 |
| Welch "C" O-10-41841 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Midland | 6 | 322K | 864K | Sep 2011 – Mar 2026 |
| Welch-Cox W39M O-10-58499 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Martin | 1 | 320K | 769K | Jan 2023 – Apr 2026 |
| Welch-Cox E39V O-10-60103 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Martin | 1 | 308K | 422K | Oct 2023 – Apr 2026 |
| Welch-Cox W39F O-10-58498 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Martin | 1 | 305K | 994K | Jan 2023 – Apr 2026 |
| Welch Foundation O-3-23680 | Linc Gulf Coast Petroleum, Inc. only | Hoskins Mound | Brazoria | 4 | 299K | 163K | Jun 1999 – Dec 2012 |
| Welch-Cox W39N O-10-58731 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Martin | 1 | 289K | 708K | Jan 2023 – Apr 2026 |
| Welch-Cox E39D O-10-59912 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Martin | 1 | 288K | 394K | Oct 2023 – Mar 2026 |
| Crawford-Welchest 27B O-10-62029 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Midland | 1 | 281K | 791K | Oct 2024 – Apr 2026 |
| Crawford-Welchest 27H O-10-61681 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Midland | 1 | 280K | 421K | Oct 2024 – Apr 2026 |
| Welch 48 O-10-44660 | Ovintiv USA Inc. only | Spraberry (Trend Area) | Martin | 2 | 278K | 613K | Nov 2013 – Sep 2025 |
| Crawford-Welchest 27R O-10-62064 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Midland | 1 | 270K | 417K | Sep 2024 – Apr 2026 |
| Welch-Cox E39U O-10-59867 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Martin | 1 | 267K | 876K | Oct 2023 – Apr 2026 |
| Welch-Cox W39H O-10-58584 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Martin | 1 | 265K | 849K | Jan 2023 – Apr 2026 |
| Crawford-Welchest 27L O-10-61865 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Midland | 1 | 262K | 468K | Oct 2024 – Apr 2026 |
| Welch-Cox W39L O-10-58501 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Martin | 1 | 261K | 470K | Jan 2023 – Apr 2026 |
| Welch-Cox E39S O-10-59913 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Martin | 1 | 259K | 839K | Oct 2023 – Apr 2026 |
| Welch Foundation O-3-25045 | Sandpoint Texas LLC only | Hoskins Mound | Brazoria | 19 | 256K | 100K | Jun 2006 – Apr 2026 |
| Welch-Cox W39O O-10-58399 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Martin | 1 | 251K | 566K | Feb 2023 – Apr 2026 |
| Welch Trust 8 O-9-18982 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) R 40 Exc | Reagan | 4 | 249K | 873K | Jan 2015 – Apr 2026 |
| Crawford-Welchest 27Q O-10-62166 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Midland | 1 | 249K | 382K | Sep 2024 – Apr 2026 |
| Drennan "208" O-11-62366 | Walkabout Operating, LLC only | Welch | Dawson | 8 | 247K | 38 | Jan 1993 – Apr 2026 |
| Crawford-Welchest 27K O-10-61960 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Midland | 1 | 212K | 531K | Oct 2024 – Apr 2026 |
| Welch-Cox E39W O-10-59823 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Martin | 1 | 211K | 466K | Oct 2023 – Apr 2026 |
| Crawford-Welchest 27D O-10-62165 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Midland | 1 | 203K | 531K | Oct 2024 – Apr 2026 |
| Britt "65" O-11-62365 | Walkabout Operating, LLC only | Welch | Dawson | 5 | 202K | 34 | Jan 1993 – Apr 2026 |
| Britt "131" O-11-62537 | Walkabout Operating, LLC only | Welch | Dawson | 5 | 197K | 34 | Jan 1993 – Apr 2026 |
| Winford O-11-63903 | Libertad Operating LLC only | Welch, SE. (Spraberry) | Dawson | 2 | 193K | 28.9K | Jan 1993 – Mar 2026 |