| Snowmass HC2 Dim G-1-301145 | Ineos USA Oil & Gas LLC only | Briscoe Ranch (Eagleford) | Dimmit | 1 | 244K | 813K | Jan 2019 – Apr 2026 |
| Snowmass HC1 Dim G-1-301146 | Ineos USA Oil & Gas LLC only | Briscoe Ranch (Eagleford) | Dimmit | 1 | 234K | 879K | Jan 2019 – Apr 2026 |
| Coates SS G-4-189890 | Petrovybe Opco LLC only | Samano, E. (Fourth Massive) | Starr | 1 | 197K | 6.08M | Apr 2002 – Apr 2026 |
| Murch, B. L. G-4-197403 | Faulconer Energy, LLC only | Samano (Fourth Massive) | Starr | 1 | 146K | 8.67M | Apr 2003 – Apr 2026 |
| Murch, B. L. G-4-191486 | Faulconer Energy, LLC only | Samano (Fourth Massive) | Starr | 1 | 142K | 6.19M | Jul 2002 – Apr 2026 |
| Murch, B. L. G-4-194829 | Faulconer Energy, LLC only | Samano (Massive 7200) | Starr | 1 | 142K | 8.35M | Jan 2003 – Apr 2026 |
| Morse G-4-191141 | Faulconer Energy, LLC only | Samano (1ST Massive) | Starr | 1 | 132K | 5.66M | Sep 2002 – Apr 2026 |
| Murch, B. L. G-4-191485 | Faulconer Energy, LLC only | Samano (Fourth Massive) | Starr | 1 | 126K | 5.58M | Jun 2002 – May 2025 |
| Murch, B. L. G-4-198867 | Faulconer Energy, LLC only | Samano (Fifth Massive) | Starr | 1 | 120K | 6.03M | Oct 2003 – Apr 2026 |
| Dielmann G-4-189686 | Petrovybe Opco LLC only | Samano (Fourth Massive) | Starr | 1 | 94.8K | 4.13M | May 2002 – Apr 2026 |
| Clinton G-2-157508 | Tesoro E&P Company, L.P. only | Goliad, West (2ND Massive) | Goliad | 1 | 92.7K | 2.45M | Jan 1996 – Mar 1998 |
| Richmond G-4-198100 | Petrovybe Opco LLC only | Samano, E. (Third Massive) | Starr | 1 | 86.1K | 2.35M | Oct 2003 – Apr 2026 |
| Samano G-4-182085 | Petrovybe Opco LLC only | Samano (Massive 7200) | Starr | 1 | 83.7K | 5.05M | Feb 2001 – May 2022 |
| Morse G-4-201249 | Faulconer Energy, LLC only | Samano (Fifth Massive) | Starr | 1 | 83.1K | 4.65M | Mar 2004 – Apr 2026 |
| Salinas, Fausto et Al G-4-185100 | Petrovybe Opco LLC only | Samano (Massive 7200) | Starr | 1 | 82.2K | 6.16M | Jul 2001 – Apr 2026 |
| Richmond G-4-194660 | Petrovybe Opco LLC only | Samano, E. (Massive 7200) | Starr | 1 | 79.4K | 2.54M | Feb 2003 – Apr 2018 |
| Richmond G-4-197364 | Petrovybe Opco LLC only | Samano, E. (Third Massive) | Starr | 1 | 78.4K | 2.87M | Sep 2003 – Apr 2026 |
| Richmond G-4-198216 | Petrovybe Opco LLC only | Samano, E. (Massive 7200) | Starr | 1 | 73.7K | 2.28M | Oct 2003 – Apr 2026 |
| Morse G-4-190442 | Faulconer Energy, LLC only | Samano, E. (Third Massive) | Starr | 1 | 72.4K | 3.58M | Jul 2002 – Apr 2026 |
| Morse-Forster Unit G-4-189729 | Faulconer Energy, LLC only | Samano, E. (Massive 7200) | Starr | 1 | 71K | 5.98M | May 2002 – Apr 2026 |
| Samano G-4-192866 | Petrovybe Opco LLC only | Samano, E. (Massive 7200) | Starr | 1 | 70.2K | 3.16M | Oct 2002 – Apr 2026 |
| Murch, B. L. G-4-191856 | Faulconer Energy, LLC only | Samano (Fourth Massive) | Starr | 1 | 69.4K | 3.69M | Aug 2002 – Apr 2026 |
| Dielmann G-4-189685 | Petrovybe Opco LLC only | Samano (Fourth Massive) | Starr | 1 | 67.6K | 5.2M | Mar 2002 – Apr 2026 |
| Samano G-4-185551 | Petrovybe Opco LLC only | Samano (Fourth Massive) | Starr | 1 | 67.5K | 5.67M | Sep 2001 – Apr 2026 |
| Richmond G-4-196983 | Petrovybe Opco LLC only | Samano (1ST Massive) | Starr | 1 | 62.9K | 2.59M | Jul 2003 – Apr 2026 |
| Murch, B.L. G-4-199293 | Faulconer Energy, LLC only | Samano (Fifth Massive) | Hidalgo | 1 | 62.6K | 3M | Nov 2003 – Apr 2026 |
| Ray, George A. G-2-181073 | Paleo Oil Company LLC only | Kerr (Massive) | Bee | 1 | 61.4K | 3.42M | Aug 2000 – Dec 2005 |
| Samano G-4-194651 | Petrovybe Opco LLC only | Samano, E. (Fourth Massive) | Starr | 1 | 55.6K | 4.22M | Mar 2003 – Apr 2026 |
| Cardenas, R. R. G-4-142827 | Oryx Energy Company only | Frost (Vicksburg Mass.) | Starr | 1 | 55.6K | 2.87M | Jan 1993 – Mar 1996 |
| Richmond G-4-247717 | Petrovybe Opco LLC only | Samano (Fourth Massive) | Starr | 1 | 55.2K | 1.09M | Aug 2008 – May 2023 |
| Morse G-4-190437 | Faulconer Energy, LLC only | Samano, E. (Fourth Massive) | Starr | 1 | 54.6K | 6.96M | Jul 2002 – Apr 2026 |
| Welder GU 217 G-4-212263 | Remora Operating, LLC only | Seven Sisters, S. (Massive) | Duval | 1 | 53.6K | 2.92M | Jul 2005 – Feb 2024 |
| Murch, B.L. G-4-197720 | Faulconer Energy, LLC only | Samano (Fourth Massive) | Starr | 1 | 53.1K | 2.79M | May 2003 – Apr 2026 |
| Smith Gas Unit G-2-212581 | Brown, Geo. R Partnership,lp,the only | Hope (Wilcox Massive) | Lavaca | 1 | 52.1K | 1.63M | Jun 2005 – Jan 2012 |
| Salinas, Fausto et Al G-4-185840 | Petrovybe Opco LLC only | Samano (Massive 7200) | Starr | 1 | 52.1K | 3.87M | Aug 2001 – Apr 2026 |
| Hart et Al G-4-189688 | Petrovybe Opco LLC only | Samano (Fourth Massive) | Starr | 1 | 49K | 2.36M | Mar 2002 – Apr 2026 |
| Morse - Forster Unit G-4-189730 | Faulconer Energy, LLC only | Samano, E. (Third Massive) | Starr | 1 | 47.4K | 4.21M | Jun 2002 – Apr 2026 |
| Murch, B. L. G-4-194832 | Faulconer Energy, LLC only | Samano (Massive 7200) | Starr | 1 | 43.6K | 2.36M | Jan 2003 – Sep 2021 |
| Coates SS G-4-191392 | Petrovybe Opco LLC only | Samano, E. (Fourth Massive) | Starr | 1 | 42.8K | 3.73M | Jul 2002 – Apr 2026 |
| Murch, B.L. G-4-200291 | Faulconer Energy, LLC only | Samano (Fifth Massive) | Hidalgo | 1 | 39.6K | 1.72M | Jan 2004 – Apr 2026 |
| Richmond G-4-200121 | Petrovybe Opco LLC only | Samano (1ST Massive) | Starr | 1 | 37.5K | 1.68M | Jul 2003 – Dec 2023 |
| Cooley, M. E. G-2-194567 | Proline Energy Resources Inc only | Mission Valley, West (Massive-1) | Victoria | 1 | 37.5K | 1.89M | Sep 2000 – Apr 2026 |
| Samano G-4-194531 | Petrovybe Opco LLC only | Samano, E. (Massive 7200) | Starr | 1 | 36.5K | 2.67M | Jan 2003 – Apr 2026 |
| CNG G-4-150127 | Mitchell Energy Corporation only | San Carlos (Frio, Massive) | Hidalgo | 1 | 35.6K | 3.34M | Apr 1994 – Jun 1997 |
| Walston-Pettus A G-2-242641 | Welderxp Ltd. only | Dallas Husky, NE. (Massive WX) | Goliad | 1 | 35.2K | 189K | Jul 2008 – Apr 2026 |
| Hausmann Unit G-2-131334 | Elliott Oil & Gas Company only | Cedar Brush (3RD Massive Wilcox) | Goliad | 1 | 34.3K | 2.69M | Jan 1993 – Nov 1998 |
| Simmons Gas Unit G-2-185204 | Aldine Oil and Gas, LP only | Austin (Wilcox Massive E) | Goliad | 1 | 34.3K | 4.63M | Feb 2001 – Apr 2026 |
| Murch, B. L. G-4-191484 | Faulconer Energy, LLC only | Samano (Fourth Massive) | Starr | 1 | 34.2K | 1.6M | Jun 2002 – Sep 2022 |
| Diaz G-4-201487 | Escudo Oil & Gas, LLC only | Samano, E. (Massive 7200) | Starr | 1 | 34K | 1.22M | May 2004 – Apr 2026 |
| Byles, J. C. et Al G-2-156130 | Oil & Gas Acquisition Group, Inc only | Caesar, South (Massive) | Bee | 1 | 33.5K | 827K | Sep 1995 – Nov 2000 |