| Simpson G-13-294234 | Oakridge Oil and Gas, LP only | Ken-Rich (Conglomerate 5100) | Jack | 1 | 70 | 17.7K | Sep 2022 – Apr 2026 |
| Daniel, M. K. "A" G-1-164288 | Wolfcamp Energy, LLC only | Simpson-Mann (Canyon) | Crockett | 1 | 64 | 323K | Jul 1997 – Sep 2025 |
| Daniel, M. K. 111 "A" G-1-181360 | Hilcorp Energy Company only | Simpson-Mann (Canyon) | Crockett | 1 | 63 | 151K | Dec 2000 – Apr 2026 |
| Simpson, Lewis G-5-231850 | Comstock Oil & Gas, LLC only | John Amoruso (Bossier) | Robertson | 1 | 63 | 9.62M | Jun 2007 – Jan 2017 |
| Simpson -C- G-2-112270 | XTO Energy Inc. only | Speaks, S.W. (3120) | Lavaca | 1 | 61 | 325K | Jan 1993 – May 2005 |
| Barker-Simpson G-13-266447 | Formentera Operations LLC only | Newark, East (Barnett Shale) | Johnson | 1 | 60 | 1.35M | Apr 2012 – Apr 2026 |
| Waymobetta G-14-245079 | Heritage Petroleum, Inc. only | Carman (Simpson) | Wheeler | 1 | 58 | 110K | Mar 2008 – Mar 2011 |
| Black, Hallie "3A" G-1-179956 | Hilcorp Energy Company only | Simpson-Mann (Canyon) | Crockett | 1 | 58 | 182K | Oct 2000 – Apr 2026 |
| Daniel, M. K. 112A G-1-184788 | Hilcorp Energy Company only | Simpson-Mann (Canyon) | Crockett | 1 | 55 | 325K | Jun 2001 – Apr 2026 |
| Daniel, M. K. "A" G-1-164285 | Wolfcamp Energy, LLC only | Simpson-Mann (Canyon) | Crockett | 1 | 54 | 461K | Aug 1997 – Apr 2026 |
| Black, Hallie 3 G-1-183934 | Hilcorp Energy Company only | Simpson-Mann (Canyon) | Crockett | 1 | 53 | 304K | May 2001 – Apr 2026 |
| Daniel, M. K. G-1-184934 | Hilcorp Energy Company only | Simpson-Mann (Canyon) | Crockett | 1 | 51 | 294K | May 2001 – Apr 2026 |
| Daniel, M. K. G-1-249914 | Hilcorp Energy Company only | Simpson-Mann (Canyon) | Crockett | 1 | 49 | 302K | Sep 2008 – Apr 2026 |
| Meadows G-1-222228 | Wolfcamp Energy, LLC only | Simpson-Mann (Canyon) | Val Verde | 1 | 48 | 235K | Oct 2006 – May 2025 |
| Daniel, M. K. G-1-182712 | Hilcorp Energy Company only | Simpson-Mann (Canyon) | Crockett | 1 | 45 | 168K | Apr 2001 – Apr 2026 |
| Black, Hallie "8" G-1-171460 | Occidental Permian Ltd. only | Simpson-Mann (Canyon) | Crockett | 1 | 44 | 9.68K | Jan 1999 – Sep 2002 |
| Daniel, M. K. G-1-183585 | Hilcorp Energy Company only | Simpson-Mann (Canyon) | Crockett | 1 | 37 | 86.6K | May 2001 – Apr 2026 |
| Daniel, M. K. G-1-184776 | Wolfcamp Energy, LLC only | Simpson-Mann (Canyon) | Crockett | 1 | 37 | 431K | Jun 2001 – Feb 2026 |
| Daniel, M. K. G-1-165884 | Wolfcamp Energy, LLC only | Simpson-Mann (Canyon) | Crockett | 1 | 35 | 731K | Sep 1997 – Oct 2025 |
| Meadows G-1-177153 | Wolfcamp Energy, LLC only | Simpson-Mann (Canyon) | Val Verde | 1 | 34 | 385K | Apr 2000 – Apr 2026 |
| Coan-Simpson G-8-82057 | Place Oil and Gas Co. only | Mittie (Marble Falls) | Comanche | 1 | 30 | 193K | Jan 1993 – Mar 2026 |
| Daniel, M. K. "A" G-1-164287 | Wolfcamp Energy, LLC only | Simpson-Mann (Canyon) | Crockett | 1 | 29 | 481K | Aug 1997 – Mar 2026 |
| Daniel, M. K. A G-1-167019 | Wolfcamp Energy, LLC only | Simpson-Mann (Canyon) | Crockett | 1 | 29 | 544K | Dec 1997 – Mar 2026 |
| Daniel, M. K. G-1-164559 | Wolfcamp Energy, LLC only | Simpson-Mann (Canyon) | Val Verde | 1 | 29 | 272K | Sep 1997 – Sep 2025 |
| Meadows G-1-166557 | Wolfcamp Energy, LLC only | Simpson-Mann (Canyon) | Val Verde | 1 | 26 | 426K | Jan 1998 – Apr 2016 |
| Daniel, M. K. G-1-168280 | Wolfcamp Energy, LLC only | Simpson-Mann (Canyon) | Val Verde | 1 | 26 | 99.3K | Dec 1997 – Oct 2025 |
| Black, Hallie "9" G-1-173556 | Hilcorp Energy Company only | Simpson-Mann (Canyon) | Crockett | 1 | 25 | 197K | Apr 1999 – Apr 2026 |
| Hallie Black 4B G-1-251657 | Hilcorp Energy Company only | Simpson-Mann (Canyon) | Crockett | 1 | 24 | 270K | Mar 2009 – Apr 2026 |
| Daniel, M. K. "A" G-1-182999 | Wolfcamp Energy, LLC only | Simpson-Mann (Canyon) | Crockett | 1 | 23 | 519K | May 2001 – Mar 2026 |
| Bunger "5" G-1-204705 | OXY USA EOR, LLC only | Simpson-Mann (Canyon) | Val Verde | 1 | 23 | 175K | Oct 2004 – Apr 2026 |
| Meadows "8" G-1-162619 | Silver Oil & Gas Inc. only | Simpson-Mann (Canyon) | Crockett | 1 | 23 | 438K | Mar 1997 – Apr 2026 |
| Daniel-State "2" G-1-221145 | Wolfcamp Energy, LLC only | Simpson-Mann (Canyon) | Crockett | 1 | 23 | 170K | Sep 2006 – Apr 2026 |
| Lewis-Simpson Ranch Oil Unit NO1 G-5-141302 | Ridley Oil Corporation only | Bazette | Navarro | 1 | 22 | 25.2K | Mar 1993 – Sep 1993 |
| Daniel, M. K. A G-1-165402 | Wolfcamp Energy, LLC only | Simpson-Mann (Canyon) | Crockett | 1 | 20 | 574K | Oct 1997 – Nov 2023 |
| Smith, W. A. G-13-68491 | Simpson Oil & Land Co. only | Jack County Regular (Gas) | Jack | 1 | 20 | 1.38K | Jan 1993 – Apr 1993 |
| Black, Hallie "9" G-1-171471 | Hilcorp Energy Company only | Simpson-Mann (Canyon) | Crockett | 1 | 20 | 121K | Jan 1999 – Apr 2026 |
| Daniel, M. K. "A' G-1-164779 | Wolfcamp Energy, LLC only | Simpson-Mann (Canyon) | Crockett | 1 | 19 | 681K | Sep 1997 – Feb 2026 |
| Daniel, M. K. G-1-169924 | Wolfcamp Energy, LLC only | Simpson-Mann (Canyon) | Val Verde | 1 | 16 | 523K | Aug 1998 – Mar 2026 |
| Lewis-Simpson Ranch Oil Unit #2 O-5-3638 | Kilmarnock Oil Company, Inc. only | Bazette (Woodbine) | Navarro | 1 | 15 | 0 | Aug 1998 – Aug 1998 |
| Ryser O-5-4024 | Kim Recovery Enterprises, LLC only | Honey Grove (Simpson Sand) | Fannin | 1 | 14 | 0 | Oct 2012 – Oct 2012 |
| Daniel, M. K. G-1-163942 | Wolfcamp Energy, LLC only | Simpson-Mann (Canyon) | Val Verde | 1 | 14 | 460K | Jul 1997 – May 2025 |
| Daniel G-1-232380 | Silver Oil & Gas Inc. only | Simpson-Mann (Canyon) | Crockett | 1 | 14 | 76.5K | Oct 2006 – Apr 2026 |
| Meadows G-1-181815 | Wolfcamp Energy, LLC only | Simpson-Mann (Canyon) | Val Verde | 1 | 14 | 99K | Feb 2001 – Mar 2026 |
| Simpson, S. et Al O-8-12292 | G & F Oil, Inc. only | Shackelford County Regular | Shackelford | 2 | 13 | 41 | Jan 1993 – May 1997 |
| Daniel-State 2 G-1-211763 | Wolfcamp Energy, LLC only | Simpson-Mann (Canyon) | Crockett | 1 | 11 | 327K | Sep 2005 – Apr 2026 |
| Meadows G-1-197265 | Wolfcamp Energy, LLC only | Simpson-Mann (Canyon) | Val Verde | 1 | 11 | 277K | Sep 2003 – Mar 2026 |
| Daniel, M. K. "A' G-1-164780 | Wolfcamp Energy, LLC only | Simpson-Mann (Canyon) | Crockett | 1 | 11 | 474K | Sep 1997 – Mar 2026 |
| Malone "13" G-1-203271 | OXY USA EOR, LLC only | Simpson-Mann (Canyon) | Val Verde | 1 | 11 | 179K | Jun 2004 – Apr 2026 |
| Meadows-State 10 G-1-232712 | Wolfcamp Energy, LLC only | Simpson-Mann (Canyon) | Val Verde | 1 | 11 | 150K | Nov 2007 – Mar 2026 |
| Daniel, M. K. "110" G-1-181939 | Hilcorp Energy Company only | Simpson-Mann (Canyon) | Crockett | 1 | 11 | 77.3K | Feb 2001 – Apr 2026 |