| San Pedro Ranch O-1-14952 | Jonah Energy LLC only | Hugh Fitzsimmons (San Miguel) | Dimmit | 219 | 21.8M | 156M | Jun 2008 – Aug 2026 |
| Hamilton Ranch O-1-17339 | Jonah Energy LLC only | Hugh Fitzsimmons (San Miguel) | Dimmit | 81 | 11.1M | 31.6M | Aug 2013 – Aug 2026 |
| Cundieff O-1-18998 | Jonah Energy LLC only | Hugh Fitzsimmons (San Miguel) | Dimmit | 10 | 981K | 3.36M | Mar 2017 – Aug 2026 |
| Grit Faith Sandy O-1-21348 | Jonah Energy LLC only | Hugh Fitzsimmons (San Miguel) | Dimmit | 8 | 951K | 9.31M | Feb 2024 – Aug 2026 |
| San Pedro Ranch O-1-4762 | Prime Operating Company only | Hugh Fitzsimmons (San Miguel) | Dimmit | 179 | 802K | 9.36M | by Jan 1993 – Jan 2023 |
| Hamilton Ranch B O-1-19174 | Grit Oil & Gas Management, LLC only | Hugh Fitzsimmons (San Miguel) | Dimmit | 6 | 649K | 1.34M | Dec 2017 – Feb 2022 |
| Ammann O-1-20667 | Endeavor Natural Gas, LP only | Hugh Fitzsimmons (San Miguel) | Dimmit | 7 | 583K | 1.33M | Jul 2022 – Aug 2026 |
| Cundieff A O-1-19723 | Jonah Energy LLC only | Hugh Fitzsimmons (San Miguel) | Dimmit | 4 | 458K | 1.06M | Apr 2019 – Aug 2026 |
| Latham McKnight O-1-18756 | Jonah Energy LLC only | Hugh Fitzsimmons (San Miguel) | Dimmit | 6 | 409K | 1.55M | Mar 2016 – Aug 2026 |
| Hamilton Ranch C O-1-19140 | Grit Oil & Gas Management, LLC only | Hugh Fitzsimmons (San Miguel) | Dimmit | 3 | 359K | 658K | Dec 2017 – Feb 2022 |
| SPR-Prime Unit B O-1-18282 | Grit Oil & Gas Management, LLC only | Hugh Fitzsimmons (San Miguel) | Dimmit | 4 | 315K | 1.91M | Oct 2014 – Jun 2024 |
| SPR-Prime Unit A O-1-17344 | Jonah Energy LLC only | Hugh Fitzsimmons (San Miguel) | Dimmit | 2 | 268K | 1.57M | Nov 2013 – Aug 2026 |
| Hamilton Ranch Jr D O-1-20876 | Jonah Energy LLC only | Hugh Fitzsimmons (San Miguel) | Dimmit | 1 | 241K | 539K | Jan 2023 – Aug 2026 |
| Hamilton Ranch Jr E O-1-20854 | Jonah Energy LLC only | Hugh Fitzsimmons (San Miguel) | Dimmit | 1 | 221K | 471K | Jan 2023 – Aug 2026 |
| Jred O-1-19582 | Atlas Operating LLC only | Hugh Fitzsimmons (San Miguel) | Dimmit | 2 | 205K | 256K | Oct 2018 – Aug 2026 |
| Hamilton Ranch HR D O-1-21696 | Jonah Energy LLC only | Hugh Fitzsimmons (San Miguel) | Dimmit | 1 | 202K | 782K | Feb 2025 – Aug 2026 |
| Hamilton Ranch Jr G O-1-20875 | Jonah Energy LLC only | Hugh Fitzsimmons (San Miguel) | Dimmit | 1 | 182K | 525K | Jan 2023 – Aug 2026 |
| San Pedro Ranch DS O-1-2543 | Prime Operating Company only | Hugh Fitzsimmons (San Miguel) | Dimmit | 31 | 173K | 1.04M | by Jan 1993 – Jun 2017 |
| Hamilton Ranch Jr F O-1-20874 | Jonah Energy LLC only | Hugh Fitzsimmons (San Miguel) | Dimmit | 1 | 172K | 426K | Jan 2023 – Aug 2026 |
| Fitzsimmons, Hugh "A" O-1-14145 | Prime Operating Company only | Hugh Fitzsimmons (San Miguel) | Dimmit | 27 | 169K | 2.67M | Jun 1997 – Jan 2023 |
| SPR-Kopas O-1-20833 | Jonah Energy LLC only | Hugh Fitzsimmons (San Miguel) | Dimmit | 1 | 139K | 843K | Mar 2023 – Aug 2026 |
| SPR Unit A O-1-17594 | Jonah Energy LLC only | Hugh Fitzsimmons (San Miguel) | Dimmit | 1 | 131K | 1.17M | Nov 2013 – Aug 2026 |
| La Bandera Ranch O-1-17340 | Jonah Energy LLC only | Hugh Fitzsimmons (San Miguel) | Dimmit | 2 | 122K | 391K | Aug 2013 – Aug 2026 |
| Hugh a Fitzsimons, et Al O-1-11382 | Prime Operating Company only | Hugh Fitzsimmons (San Miguel) | Dimmit | 16 | 113K | 1.71M | by Jan 1993 – Jan 2023 |
| San Pedro Ranch B O-1-21207 | Jonah Energy LLC only | Hugh Fitzsimmons (San Miguel) | Dimmit | 1 | 113K | 1.07M | Sep 2023 – Aug 2026 |
| Jred Wilson O-1-20046 | Atlas Operating LLC only | Hugh Fitzsimmons (San Miguel) | Dimmit | 1 | 103K | 163K | Oct 2019 – Aug 2026 |
| San Pedro Ranch-Conoco O-1-4325 | Prime Operating Company only | Hugh Fitzsimmons (San Miguel) | Dimmit | 23 | 97.9K | 2.54M | by Jan 1993 – Oct 2022 |
| San Pedro Ranch A O-1-21203 | Jonah Energy LLC only | Hugh Fitzsimmons (San Miguel) | Dimmit | 1 | 92.6K | 1.06M | Sep 2023 – Aug 2026 |
| Hamilton Ranch AB O-1-18087 | Grit Oil & Gas Management, LLC only | Hugh Fitzsimmons (San Miguel) | Dimmit | 1 | 84K | 576K | Nov 2014 – Feb 2022 |
| SPR-Kopas B O-1-21208 | Jonah Energy LLC only | Hugh Fitzsimmons (San Miguel) | Dimmit | 1 | 78.3K | 810K | Aug 2023 – Aug 2026 |
| Comanche SM O-1-18953 | El Toro Resources LLC only | Hugh Fitzsimmons (San Miguel) | Maverick | 3 | 75.3K | 1.04K | Oct 2017 – Aug 2026 |
| Hamilton Ranch AC O-1-18098 | Grit Oil & Gas Management, LLC only | Hugh Fitzsimmons (San Miguel) | Dimmit | 1 | 65.9K | 494K | Sep 2014 – Feb 2022 |
| SPR Kopas A O-1-21194 | Jonah Energy LLC only | Hugh Fitzsimmons (San Miguel) | Dimmit | 1 | 64.4K | 683K | Aug 2023 – Aug 2026 |
| Tocquigny Unit O-1-18610 | Atlas Operating LLC only | Hugh Fitzsimmons (San Miguel) | Dimmit | 4 | 63.6K | 60.4K | Feb 2014 – Aug 2026 |
| Halsell A O-1-19050 | Jonah Energy LLC only | Hugh Fitzsimmons (San Miguel) | Dimmit | 1 | 41.8K | 28.3K | Apr 2017 – Aug 2026 |
| Halsell O-1-18882 | Endeavor Natural Gas, LP only | Hugh Fitzsimmons (San Miguel) | Dimmit | 1 | 40.9K | 57K | Sep 2016 – Jul 2019 |
| Covert O-1-19146 | Endeavor Natural Gas, LP only | Hugh Fitzsimmons (San Miguel) | Dimmit | 2 | 35.3K | 47.6K | Nov 2017 – Jul 2019 |
| Hamilton Ranch O-1-13709 | Hamilton, J. R. only | Hugh Fitzsimmons (San Miguel) | Dimmit | 1 | 21.9K | 6.39K | Mar 1993 – Jan 2020 |
| Fitzsimmons "A" O-1-14178 | Prime Operating Company only | Hugh Fitzsimons (Olmos) | Dimmit | 2 | 13.3K | 153K | Mar 1998 – Jan 2022 |
| Hamilton Ranch "A" O-1-6882 | Hamilton, J. R. only | Hugh Fitzsimmons (San Miguel) | Dimmit | 5 | 9.71K | 1.57K | by Jan 1993 – Sep 2023 |
| Fitzsimmons 25 O-1-14341 | Prime Operating Company only | Hugh Fitzsimmons (San Miguel) | Dimmit | 1 | 6.34K | 82.6K | Apr 2001 – May 2017 |
| San Pedro Ranch -A- O-1-13249 | Prime Operating Company only | Hugh Fitzsimmons (San Miguel) | Dimmit | 1 | 6.31K | 75.7K | by Jan 1993 – Jun 2016 |
| Tocquigny SM O-1-21913 | Atlas Operating LLC only | Hugh Fitzsimmons (San Miguel) | Dimmit | 3 | 5.95K | 16.7K | Mar 2026 – Aug 2026 |
| West O-1-14106 | Apache Corporation only | Hugh Fitzsimmons (San Miguel) | Dimmit | 1 | 4.54K | 0 | Jan 1997 – Jul 2001 |
| Hugh A. Fitzsimons, et al -Z- O-1-11354 | Prime Operating Company only | Hugh Fitzsimmons (San Miguel) | Dimmit | 2 | 2.68K | 13.5K | by Jan 1993 – Jul 2008 |
| Fitzsimons "A" G-1-166532 | Prime Operating Company only | Hugh Fitzsimmons (San Miguel) | Dimmit | 1 | 2.16K | 320K | Nov 1997 – Jan 2023 |
| Hamilton -B- O-1-6881 | Hamilton Oil Inc. only | Hugh Fitzsimmons (San Miguel) | Dimmit | 4 | 1.28K | 40 | by Jan 1993 – Dec 1996 |
| Hamilton 3C O-1-13711 | Hamilton Oil Inc. only | Hugh Fitzsimmons (San Miguel) | Dimmit | 1 | 673 | 38 | Mar 1993 – Nov 1996 |
| Hamilton "4C" O-1-13708 | Hamilton Oil Inc. only | Hugh Fitzsimmons (San Miguel) | Dimmit | 3 | 485 | 34 | Mar 1993 – Oct 1996 |
| San Pedro Ranch G-1-241902 | Jonah Energy LLC only | Hugh Fitzsimmons (San Miguel) | Dimmit | 1 | 314 | 58.2K | Sep 2008 – Dec 2018 |