| Hirsch Estate O-3-24889 | Rim Operating, Inc. only | Cottonwood (Frio 2ND) | Liberty | 1 | 55.9K | 0 | May 2006 – Apr 2026 |
| Hirsch Estate 2104 B G-4-160492 | Hilcorp Energy Company only | Big Cowboy (Lobo) | Webb | 1 | 38.6K | 3.31M | Oct 1996 – Jan 2017 |
| Hirsch Estate J G-4-142875 | Killam Oil Co., Ltd. only | B.M.T. (Lobo Cons.) | Webb | 1 | 28.9K | 1.81M | Jan 1993 – Apr 2026 |
| Hirsch Estate 2093 G-4-138457 | Hilcorp Energy Company only | Big Cowboy (Lobo) | Webb | 1 | 27.8K | 2.55M | Jan 1993 – Apr 2026 |
| Hirsch Estate No. 1954 G-4-184855 | Hilcorp Energy Company only | Big Cowboy (Lobo) | Webb | 1 | 27.3K | 3.56M | Aug 2001 – Apr 2026 |
| Hirsch Estate 1771 G-4-164144 | Hilcorp Energy Company only | Big Cowboy (Lobo) | Webb | 1 | 23.6K | 2.83M | May 1997 – Apr 2026 |
| Hirsch Estate 517 G-4-183728 | Hilcorp Energy Company only | Big Cowboy (Lobo) | Webb | 1 | 21K | 696K | Mar 2001 – Feb 2006 |
| Hirsch Estate 537 G-4-170511 | Hilcorp Energy Company only | Big Cowboy (Lobo) | Webb | 1 | 20.8K | 809K | Sep 1998 – Apr 2026 |
| Hirsch Estate A G-4-143419 | Hilcorp Energy Company only | Big Cowboy (Lobo) | Webb | 1 | 20.8K | 2.54M | Jan 1993 – Nov 2017 |
| Hirsch Estate O-3-1058 | Rim Operating, Inc. only | Cottonwood | Liberty | 3 | 19.2K | 21 | Jan 1993 – Apr 2006 |
| Hirsch Estate 1766 G-4-158123 | Hilcorp Energy Company only | Big Cowboy (Lobo) | Webb | 1 | 16.2K | 1.98M | Apr 1996 – Apr 2026 |
| Hirsch Estate 517 G-4-138518 | Hilcorp Energy Company only | Big Cowboy (Lobo) | Webb | 1 | 15.3K | 1.45M | Jan 1993 – Apr 2026 |
| Hirsch Estate 2071 G-4-140147 | Hilcorp Energy Company only | Big Cowboy (Lobo) | Webb | 1 | 15K | 1.58M | Jan 1993 – Dec 2022 |
| Hirsch Estate 1766 G-4-91289 | Hilcorp Energy Company only | Big Cowboy (Lobo) | Webb | 1 | 13.5K | 2.03M | Jan 1993 – Apr 2026 |
| Hirsch Estate 2071 G-4-169529 | Conocophillips Company only | Big Cowboy (Lobo) | Webb | 1 | 13.1K | 394K | May 1998 – Apr 2001 |
| Hirsch Estate Gas Unit 1766 G-4-129859 | Hilcorp Energy Company only | El Caballero (Lobo) | Webb | 1 | 12.3K | 756K | Feb 1993 – Apr 2026 |
| Hirsch Estate 858 G-4-161957 | Hilcorp Energy Company only | Big Cowboy (Lobo) | Webb | 1 | 10.4K | 329K | Nov 1996 – Feb 2016 |
| Hirsch Estate "2095" G-4-131670 | Hilcorp Energy Company only | Big Cowboy (Lobo) | Webb | 1 | 10.3K | 1.02M | Jan 1993 – Apr 2026 |
| Hirsch Estate 2094 G-4-195937 | Hilcorp Energy Company only | Big Cowboy (Lobo) | Webb | 1 | 10.3K | 2.24M | Jun 2003 – Apr 2026 |
| Hirsch Estate 1766 G-4-115796 | Hilcorp Energy Company only | Big Cowboy (Lobo) | Webb | 1 | 10.1K | 437K | Jan 1993 – Apr 2026 |
| Hirsch Estate 857 G-4-104927 | Conoco Inc. only | Big Cowboy (Lobo) | Webb | 1 | 9.78K | 468K | Jan 1993 – May 1996 |
| Hirsch Estate Gas Unit G-4-133784 | Conocophillips Company only | Big Cowboy (Lobo) | Webb | 1 | 9.45K | 990K | Jan 1993 – Aug 2008 |
| Hirsch Estate 1772 G-4-191619 | Hilcorp Energy Company only | Big Cowboy (Lobo) | Webb | 1 | 8.85K | 1.54M | Aug 2002 – Apr 2026 |
| Hirsch Estate 2096 G-4-113244 | Hilcorp Energy Company only | Big Cowboy (Lobo) | Webb | 1 | 8.58K | 2.56M | Jan 1993 – Apr 2026 |
| Hirsch Estate 1772 G-4-114141 | Hilcorp Energy Company only | Big Cowboy (Lobo) | Webb | 1 | 7.81K | 1.1M | Jan 1993 – Apr 2026 |
| Hirsch Estate Gas Unit 1766 G-4-162230 | Hilcorp Energy Company only | Big Cowboy (Lobo) | Webb | 1 | 7.42K | 1.68M | Dec 1996 – Apr 2026 |
| Hirsch Estate 54 G-4-165741 | Conocophillips Company only | Big Cowboy (Lobo) | Webb | 1 | 6.53K | 302K | Dec 1997 – Mar 2000 |
| Hirsch Estate 537 G-4-188199 | Hilcorp Energy Company only | Big Cowboy (Lobo) | Webb | 1 | 6.17K | 566K | Feb 2002 – Apr 2026 |
| Hirsch Estate 858 G-4-140778 | Conocophillips Company only | Big Cowboy (Lobo) | Webb | 1 | 5.91K | 1.13M | Jan 1993 – Jun 1997 |
| Hirsch Estate 537 G-4-168108 | Hilcorp Energy Company only | Big Cowboy (Lobo) | Webb | 1 | 5.6K | 334K | May 1998 – Sep 2003 |
| Hirsch Estate A G-4-142703 | Hilcorp Energy Company only | Big Cowboy (Lobo) | Webb | 1 | 5.6K | 648K | Jan 1993 – Feb 2018 |
| Hirsch Estate 538 G-4-139641 | Conocophillips Company only | Big Cowboy (Lobo) | Webb | 1 | 5.32K | 531K | Jan 1993 – Apr 2002 |
| Hirsch Estate 2094 G-4-110945 | Hilcorp Energy Company only | Big Cowboy (Lobo) | Webb | 1 | 5.24K | 1.27M | Apr 1993 – Apr 2026 |
| Hirsch Estate 1772 G-4-98497 | Hilcorp Energy Company only | Big Cowboy (Lobo) | Webb | 1 | 4.74K | 916K | Jan 1993 – Apr 2026 |
| Hirsch Estate 538 G-4-133823 | Hilcorp Energy Company only | Big Cowboy (Lobo) | Webb | 1 | 4.51K | 289K | May 1993 – Apr 2026 |
| Hirsch Estate 1765 G-4-121589 | Hilcorp Energy Company only | Big Cowboy (Lobo) | Webb | 1 | 4.18K | 436K | Jan 1993 – Apr 2026 |
| Hirsch Estate 1770 B G-4-138764 | Hilcorp Energy Company only | Big Cowboy (Lobo) | Webb | 1 | 4.13K | 626K | Jan 1993 – Dec 2008 |
| Hirsch Estate 2071 G-4-141912 | Hilcorp Energy Company only | Big Cowboy (Lobo) | Webb | 1 | 3.88K | 138K | Jan 1993 – Jan 2001 |
| Hirsch Estate "2093" G-4-132025 | Hilcorp Energy Company only | Big Cowboy (Lobo) | Webb | 1 | 3.81K | 535K | Jan 1993 – Apr 2026 |
| Hirsch Estate 2071 G-4-139409 | Hilcorp Energy Company only | Big Cowboy (Lobo) | Webb | 1 | 3.44K | 703K | Jan 1993 – Apr 2026 |
| Hirsch Estate 1765 B G-4-134820 | Hilcorp Energy Company only | Big Cowboy (Lobo) | Webb | 1 | 3.37K | 505K | Jan 1993 – Apr 2026 |
| Hirsch Estate 1772 G-4-141795 | Hilcorp Energy Company only | Big Cowboy (Lobo) | Webb | 1 | 3.27K | 470K | Jan 1993 – Sep 2014 |
| Hirsch Estate 2094 G-4-123370 | Hilcorp Energy Company only | Big Cowboy (Lobo) | Webb | 1 | 3.11K | 526K | Jan 1993 – Apr 2026 |
| Hirsch Estate 517 G-4-139120 | Conocophillips Company only | Big Cowboy (Lobo) | Webb | 1 | 2.8K | 93.7K | Jan 1993 – Jun 1994 |
| Hirsch Estate 1771 G-4-110244 | Hilcorp Energy Company only | Big Cowboy (Lobo) | Webb | 1 | 2.75K | 387K | Jan 1993 – Apr 2026 |
| Hirsch Estate 1772 G-4-201692 | Hilcorp Energy Company only | Big Cowboy (Lobo) | Webb | 1 | 2.59K | 321K | Feb 2004 – Apr 2026 |
| Hirsch Estate 857 G-4-231951 | Hilcorp Energy Company only | Big Cowboy (Lobo) | Webb | 1 | 2.44K | 140K | Jul 2007 – Apr 2026 |
| Hirsch Estate 538 G-4-138040 | Conocophillips Company only | Big Cowboy (Lobo) | Webb | 1 | 2.35K | 223K | Jan 1993 – Feb 1997 |
| Hirsch Estate J. G-4-133793 | Killam Oil Co., Ltd. only | B.M.T. (Lobo Cons.) | Webb | 1 | 2.22K | 1.05M | Jan 1993 – Mar 2016 |
| Hirsch Estate 537 G-4-95750 | Conocophillips Company only | Big Cowboy (Lobo) | Webb | 1 | 2.09K | 101K | Jan 1993 – Sep 1996 |