| Marrs McLean O-1-17169 | Trailblazer Energy Resources,llc only | Briscoe Ranch (Eagleford) | Frio | 10 | 1.37M | 5.37M | Oct 2013 – Aug 2026 |
| Marrs McLean O-1-15864 | Javelin Energy Partners Mgmt LLC only | Briscoe Ranch (Eagleford) | Frio | 7 | 576K | 534K | Mar 2012 – Aug 2026 |
| Marrs McLean O-1-16221 | Trailblazer Energy Resources,llc only | Pearsall (Austin Chalk) | Frio | 1 | 89K | 354 | May 2011 – Oct 2016 |
| G. W. Brown Unit G-3-270295 | Orx Resources, L.L.C. only | Marrs McLean (Nod. 2, FB-7) | Jefferson | 1 | 82.1K | 9.41M | Mar 2013 – Jul 2025 |
| Marrs McLean O-3-21766 | Oily Dog Operators Texas, LLC only | Liberty, South | Liberty | 2 | 43.2K | 86 | by Jan 1993 – Nov 2017 |
| Marrs McLean "G" O-3-25116 | Sandpoint Texas LLC only | High Island | Galveston | 1 | 30.6K | 0 | Nov 2007 – Aug 2025 |
| Burrell Estate G-3-257222 | Square Mile Energy, L.L.C. only | Marrs McLean (Frio B 11,200) | Jefferson | 1 | 20.7K | 878K | May 2010 – Aug 2012 |
| Marrs McLean Estate O-4-9572 | Three C Exploration, LLC only | Collett (Yegua 3180) | Jim Hogg | 5 | 16.7K | 21 | by Jan 1993 – Jan 2023 |
| Lebold O-3-26213 | Square Mile Energy, L.L.C. only | Marrs McLean (Hackb. 10,800) | Jefferson | 1 | 14.5K | 0 | Jan 2013 – Dec 2014 |
| BB Unit G-3-209807 | Square Mile Energy, L.L.C. only | Marrs McLean (FB-7, Nodosaria) | Jefferson | 1 | 13K | 3.27M | Apr 2005 – Apr 2012 |
| Marrs McLean "H" O-3-25082 | Sandpoint Texas LLC only | High Island | Galveston | 1 | 12.9K | 0 | Oct 2007 – Aug 2026 |
| Marrs McLean Unit G-1-261622 | Trailblazer Energy Resources,llc only | Doering Ranch (Georgetown) | Frio | 1 | 8K | 713K | Mar 2011 – Aug 2026 |
| Broussard G-3-157663 | Elliott Oil & Gas Operating Co. only | Marrs McLean (McLean) | Jefferson | 1 | 7.77K | 1.13M | Dec 1995 – Aug 2023 |
| Marrs McLean Unit G-3-253427 | Magnum Producing, LP only | Big Hill (Marginulina) | Jefferson | 1 | 6.54K | 881K | Oct 2009 – Sep 2013 |
| Brown, George W., et al Unit G-3-7304 | Square Mile Energy, L.L.C. only | Marrs McLean (McLean) | Jefferson | 1 | 6.29K | 1.12M | by Jan 1993 – May 2012 |
| Marrs McLean Unit G-1-260006 | Trailblazer Energy Resources,llc only | Doering Ranch (Georgetown) | Frio | 1 | 4.52K | 581K | Nov 2010 – Jul 2024 |
| Marrs McLean Unit G-1-259992 | Trailblazer Energy Resources,llc only | Doering Ranch (Georgetown) | Frio | 1 | 4.36K | 431K | Nov 2010 – Feb 2025 |
| Marrs McLean Unit G-1-263312 | Trailblazer Energy Resources,llc only | Doering Ranch (Georgetown) | Frio | 1 | 4.22K | 775K | Apr 2011 – Aug 2024 |
| Bordages Heirs G-3-257945 | Square Mile Energy, L.L.C. only | Marrs McLean (Hackb. 10,200) | Jefferson | 1 | 2.82K | 254K | Sep 2010 – Oct 2012 |
| Marrs McLean O-1-15219 | Bishop Petroleum Inc. only | Charlotte, North | Atascosa | 1 | 2.73K | 0 | Jul 2010 – Dec 2011 |
| McLean et al Unit G-3-7302 | Hilcorp Energy Company only | Marrs McLean (FB-3, Hackberry) | Jefferson | 1 | 2.68K | 6.08M | by Jan 1993 – Aug 2026 |
| Marrs McLean G-4-172985 | Opex Energy, LLC only | Lockhart (Cockfield 4) | Starr | 1 | 2.54K | 373K | May 1999 – Dec 2003 |
| Marrs McLean Unit G-1-271820 | Trailblazer Energy Resources,llc only | Doering Ranch (Georgetown) | Frio | 1 | 2.24K | 413K | Aug 2013 – Jul 2024 |
| Marrs McLean G-3-247933 | Magnum Producing, LP only | Big Hill (Frio A) | Jefferson | 1 | 2.01K | 617K | Dec 2008 – Oct 2013 |
| Marrs McLean "C" G-4-117304 | Hilcorp Energy Company only | Vaquillas Ranch (Lobo Cons.) | Webb | 1 | 1.56K | 447K | by Jan 1993 – Oct 2006 |
| Marrs McLean a/C Unit O-1-16498 | Virtex Operating Company, Inc. only | Pearsall (Austin Chalk) | Frio | 1 | 1.32K | 22 | Oct 2011 – Aug 2012 |
| Marrs McLean Trust -C- G-4-155807 | Columbus Energy, LLC only | Thompsonville, NE. (12500) | Jim Hogg | 1 | 1.11K | 9.74M | Jun 1995 – Aug 2026 |
| Broussard O-3-22857 | Samedan Oil Corporation only | Marrs McLean (Nodosaria 11400) | Jefferson | 1 | 1.03K | 673 | Sep 1995 – Oct 1995 |
| Frost National Bank G-3-78533 | Tucker Operating Co., Inc. only | Marrs McLean (McLean, Lo.) | Jefferson | 1 | 916 | 234K | by Jan 1993 – Jun 1998 |
| Marrs McLean Unit G-1-251760 | Trailblazer Energy Resources,llc only | Doering Ranch (Georgetown) | Frio | 1 | 883 | 199K | Jul 2009 – Sep 2021 |
| Marrs McLean A G-4-192458 | Hilcorp Energy Company only | Vaquillas Ranch (Lobo Cons.) | Webb | 1 | 796 | 1.24M | Nov 2002 – Aug 2026 |
| Brown, George W.,sr.,et al Unit G-3-7307 | Square Mile Energy, L.L.C. only | Marrs McLean (FB-7, Hackberry) | Jefferson | 1 | 696 | 88.9K | by Jan 1993 – May 1998 |
| Marrs McLean Trust -A- G-4-211212 | Columbus Energy, LLC only | Thompsonville, NE. (12500) | Jim Hogg | 1 | 357 | 1.64M | Jun 2005 – Dec 2017 |
| Marrs McLean Trust -A- G-4-171363 | Columbus Energy, LLC only | Thompsonville, NE. (12500) | Jim Hogg | 1 | 348 | 7.91M | Sep 1998 – Aug 2026 |
| Marrs McLean Trust G-4-184921 | Columbus Energy, LLC only | Thompsonville, NE. (12500) | Jim Hogg | 1 | 261 | 7.36M | Sep 2001 – Aug 2026 |
| Marrs McLean Trust G-4-150050 | Columbus Energy, LLC only | Thompsonville, NE. (12500 FB-C) | Jim Hogg | 1 | 242 | 12M | May 1994 – Aug 2026 |
| Marrs McLean G-4-194453 | Conocophillips Company only | Vaquillas Ranch (Lobo Cons.) | Webb | 1 | 219 | 106K | Mar 2003 – Mar 2011 |
| Marrs McLean Trust -A- G-4-191795 | Columbus Energy, LLC only | Thompsonville, NE. (10640) | Jim Hogg | 1 | 196 | 5.4M | Nov 2002 – Aug 2026 |
| Marrs McLean G-4-164350 | Conocophillips Company only | Vaquillas Ranch (Lobo Cons.) | Webb | 1 | 158 | 32.6K | Jul 1997 – Jan 2006 |
| Marrs McLean Trust G-4-195634 | Columbus Energy, LLC only | Thompsonville, NE. (12500) | Jim Hogg | 1 | 137 | 2.75M | Jun 2003 – Aug 2026 |
| Marrs McLean Trust G-4-163877 | Columbus Energy, LLC only | Thompsonville, NE. (12500 FB-C) | Jim Hogg | 1 | 125 | 10.3M | Jul 1997 – Jul 2022 |
| Marrs McLean Trust G-4-178020 | Columbus Energy, LLC only | Thompsonville, NE. (12500) | Jim Hogg | 1 | 125 | 5.36M | Jul 2000 – Aug 2026 |
| Marrs McLean Trust -A- G-4-230403 | Columbus Energy, LLC only | Thompsonville, NE. (10640) | Jim Hogg | 1 | 115 | 821K | May 2006 – Apr 2017 |
| Marrs McLean G-4-261380 | EOG Resources, Inc. only | Stirling (Wilcox Consolidated) | Zapata | 1 | 114 | 75.7K | Jun 2011 – Oct 2012 |
| Marrs McLean "C" G-4-147055 | Conocophillips Company only | Vaquillas Ranch (Lobo Cons.) | Webb | 1 | 86 | 850K | Oct 1993 – May 1998 |
| Marrs McLean Trust C G-4-245778 | Columbus Energy, LLC only | Thompsonville, NE. (11,300) | Jim Hogg | 1 | 61 | 202K | Nov 2008 – Aug 2026 |
| Marrs McLean "C" G-4-121432 | Conocophillips Company only | Vaquillas Ranch (Lobo Cons.) | Webb | 1 | 58 | 216K | by Jan 1993 – Oct 1994 |
| Marrs McLean Trust G-4-176678 | Columbus Energy, LLC only | Thompsonville, NE. (12500) | Jim Hogg | 1 | 45 | 2.35M | Apr 2000 – Feb 2016 |
| Marrs McLean Trust -C- G-4-210492 | BP America Production Company only | Thompsonville, NE. (10640) | Jim Hogg | 1 | 36 | 14.2K | May 2005 – Apr 2006 |
| Marrs McLean Trust G-4-166952 | Columbus Energy, LLC only | Thompsonville, NE. (12500 FB-C) | Jim Hogg | 1 | 28 | 1.16M | Feb 1998 – Jun 2018 |