| Wheelock Gas Unit O/A G-4-50508 | Jeffress (Vicksburg V) | Hidalgo | 1 | 172K | 11.4M | Jan 1993 – Apr 2026 |
| Russell Rentfro G-4-224306 | Jeffress (Vicksburg V) | Hidalgo | 1 | 134K | 8.69M | Nov 2006 – Apr 2026 |
| Wheelock Gas Unit G-4-230399 | Jeffress (Vicksburg W) | Hidalgo | 1 | 126K | 6.03M | Aug 2007 – Apr 2026 |
| Rentfro, Russell G-4-143691 | Jeffress (Vicksburg V) | Hidalgo | 1 | 120K | 6.25M | Jan 1993 – Apr 2026 |
| Wheelock Gas Unit G-4-243584 | Jeffress (Vicksburg W) | Hidalgo | 1 | 85.1K | 4.67M | Jun 2008 – Apr 2026 |
| Russell Rentfro G-4-232153 | Jeffress (Vicksburg V) | Hidalgo | 1 | 60.6K | 4.63M | Nov 2007 – Apr 2026 |
| Rentfro, Russell G-4-197895 | Jeffress, N (Vksbg, LO) | Hidalgo | 1 | 22.2K | 2M | Oct 2003 – Apr 2026 |
| Russell Rentfro G-4-248356 | Jeffress (Vicksburg V) | Hidalgo | 1 | 16.9K | 810K | Mar 2009 – Apr 2026 |
| Gonzalez Benavides G-4-301471 | Falcon Lake, E. | Zapata | 1 | 1.45K | 609K | Apr 2022 – Apr 2026 |
| Veleno Ranch G-4-224693 | Exsun (Lobo Cons.) | Zapata | 1 | 14 | 440K | Sep 2006 – Apr 2026 |
| Veleno Ranch G-4-202932 | Exsun (Lobo Cons.) | Zapata | 1 | 12 | 4.59M | Jun 2004 – Apr 2026 |
| Gonzalez G-4-204108 | Lopeno, NE. (Wilcox 8400) | Zapata | 1 | 12 | 4.03M | Sep 2004 – Apr 2026 |
| Veleno Ranch G-4-205381 | Exsun (Lobo Cons.) | Zapata | 1 | 7 | 1.75M | Sep 2004 – Apr 2026 |
| Swantner Gas Unit G-4-207276 | Exsun (Lobo Cons.) | Zapata | 1 | 4 | 3.28M | Dec 2004 – Apr 2026 |
| Swantner Gas Unit G-4-213830 | Exsun (Lobo Cons.) | Zapata | 1 | 1 | 1.64M | Sep 2005 – Apr 2026 |
| Veleno Ranch G-4-203851 | Exsun (Lobo Cons.) | Zapata | 1 | 0 | 826K | Jul 2004 – Apr 2026 |
| Veleno Ranch G-4-212813 | Exsun (Lobo Cons.) | Zapata | 1 | 0 | 2.96M | Aug 2005 – Apr 2026 |
| Dunks G-3-294983 | Rankin (Cook Mtn. IV) | Harris | 1 | 6.71K | 154K | Nov 2022 – Dec 2024 |
| Allar G-3-291099 | B Red (Nodosaria) | Orange | 1 | 114K | 958K | Feb 2021 – Oct 2024 |
| Veleno Ranch G-4-201874 | Exsun (Lobo Cons.) | Zapata | 1 | 4 | 5.23M | Mar 2004 – Sep 2024 |
| Wheelock Gas Unit O/A G-4-187000 | Jeffress (Vicksburg V) | Hidalgo | 1 | 118K | 7.92M | Dec 2001 – Jul 2024 |
| Governor Bill Daniel, Sect 161 O-3-27589 | Rich Ranch (Yegua) | Liberty | 1 | 56.8K | 96.3K | Feb 2019 – Apr 2023 |
| Cook Family Trust G-3-254627 | Cecil Noble (Wilcox 9325) | Colorado | 1 | 26.4K | 1.15M | Dec 2009 – Mar 2023 |
| Wheelock Gas Unit G-4-176687 | Jeffress (Vicksburg V) | Hidalgo | 1 | 4.41K | 175K | Jan 2000 – Apr 2020 |
| Wheelock Gas Unit G-4-150170 | Jeffress (Vicksburg V) | Hidalgo | 1 | 59K | 4.67M | Jun 1994 – Mar 2020 |
| Rentfro, Russell G-4-180774 | Jeffress, N (Vksbg, LO) | Hidalgo | 1 | 8.55K | 186K | Nov 2000 – Mar 2020 |
| Wheelock Gas Unit O/A G-4-64569 | Jeffress (Vicksburg V) | Hidalgo | 1 | 109K | 8.58M | Jan 1993 – Dec 2019 |
| Wheelock Gas Unit O/A G-4-180766 | Jeffress (Vicksburg T) | Hidalgo | 1 | 66.9K | 3.94M | Nov 2000 – Aug 2019 |
| Wheelock Gas Unit O/A G-4-180442 | Jeffress (Vicksburg T) | Hidalgo | 1 | 4.08K | 130K | Dec 2000 – Apr 2019 |
| Wheelock Gas Unit O/A G-4-249058 | Jeffress (Vicksburg S) | Hidalgo | 1 | 266 | 10.5K | Apr 2009 – Mar 2015 |
| Mosley G-2-139459 | Dreyer (2900) | Goliad | 1 | 0 | 1.91M | Jan 1993 – Mar 2015 |
| Russell Rentfro G-4-234495 | Jeffress (Vicksburg U) | Hidalgo | 1 | 6.46K | 467K | Jul 2007 – Feb 2009 |
| Hunt, Jeffrey D. O-4-12879 | Geronimo N. (Frio M-11) | San Patricio | 1 | 4.8K | 28K | Nov 1999 – Aug 2008 |
| Rentfro, Russell G-4-184150 | Jeffress (Vicksburg T) | Hidalgo | 1 | 17.9K | 1.18M | Jun 2001 – Sep 2003 |
| Wheelock Gas Unit O/A G-4-74286 | Jeffress (Vicksburg W) | Hidalgo | 1 | 2.1K | 184K | Jan 1993 – Jun 1994 |
| Rentfro, Russell G-4-55065 | Jeffress (Vicksburg V) | Hidalgo | 1 | 11K | 347K | Jan 1993 – Mar 1994 |
| Rentfro, Russell G-4-145368 | Jeffress (Vicksburg 7380) | Hidalgo | 1 | 5 | 5.16K | Apr 1993 – Jun 1993 |
| Wheelock Gas Unit G-4-198108 | Jeffress, N (Vksbg, LO) | Hidalgo | 1 | 0 | 0 | — |
| Wheelock Gas Unit G-4-197878 | Jeffress (Vicksburg U) | Hidalgo | 1 | 0 | 0 | — |
| Wheelock Gas Unit G-4-231307 | Jeffress (Vicksburg V) | Hidalgo | 1 | 0 | 0 | — |
| Russell Rentfro G-4-231960 | Jeffress (Vicksburg W) | Hidalgo | 1 | 0 | 0 | — |
| Guerra, Avelino G-4-196032 | Lopeno (Consolidated) | Zapata | 1 | 0 | 0 | — |
| Rentfro, Russell G-4-184151 | Jeffress (Vicksburg U) | Hidalgo | 1 | 0 | 0 | — |
| Russell Rentfro G-4-236917 | Jeffress (Vicksburg W) | Hidalgo | 1 | 0 | 0 | — |
| Rentfro, Russell G-4-182713 | Jeffress (Vicksburg S) | Hidalgo | 1 | 0 | 0 | — |
| Wheelock Gas Unit G-4-243587 | Jeffress (Vicksburg V) | Hidalgo | 1 | 0 | 0 | — |
| Wheelock Gas Unit O/A G-4-180767 | Jeffress (Vicksburg S) | Hidalgo | 1 | 0 | 0 | — |
| Wheelock Gas Unit G-4-176689 | Jeffress (Vicksburg W) | Hidalgo | 1 | 0 | 0 | — |
| Benavides Mineral Trusts G-4-294552 | Lopeno, SW (Wilcox 7380) | Zapata | 1 | 0 | 0 | — |
| Vela-Lopeno Minerals Ltd. G-4-171584 | Wildcat | Zapata | 1 | 0 | 0 | — |