| Maccarthy, Janet G-3-199113 | Denbury Onshore, LLC only | Willow Slough, N. (10770 Sand) | Chambers | 1 | 254K | 2.42M | Nov 2003 – May 2008 |
| Naiser, J.E. Estate G-3-131991 | Faulconer Energy, LLC only | Mott Slough (Yegua) | Wharton | 1 | 182K | 10.3M | Jan 1993 – Apr 2026 |
| Tytex G-3-147820 | Rutherford Oil Corporation only | Willow Slough,n.(nodosaria 9500) | Chambers | 1 | 164K | 1.43M | Nov 1993 – Jun 1996 |
| Sheard Gas Unit G-3-174860 | Faulconer, Vernon E., Inc. only | Mott Slough (Yegua) | Wharton | 1 | 76K | 2.63M | Sep 1999 – Jan 2015 |
| Naiser, J. E. Estate G-3-133342 | Faulconer Energy, LLC only | Mott Slough (Yegua) | Wharton | 1 | 67.3K | 5.46M | Jan 1993 – Apr 2026 |
| Santos-Lewis GU G-3-188995 | Atlas Operating LLC only | Duncan Slough (Frio Cons.) | Matagorda | 1 | 49K | 2.3M | Sep 2001 – Mar 2026 |
| Saint John Catholic Church Unit G-3-168100 | Faulconer Energy, LLC only | Mott Slough (Yegua) | Wharton | 1 | 45.3K | 3.99M | May 1998 – Apr 2026 |
| Jackson G-3-279195 | Hilcorp Energy Company only | Willow Slough (13300) | Chambers | 1 | 38.4K | 2.62M | Feb 2015 – Nov 2021 |
| Hebert & Broussard G-3-186758 | Kerr-McGee Oil & Gas Onshore LLC only | Willow Slough (Nod. B-3) | Chambers | 1 | 37.9K | 2.95M | Oct 2001 – Jul 2002 |
| Lewis, J. C. G-3-160251 | Atlas Operating LLC only | Duncan Slough (Frio Cons.) | Matagorda | 1 | 37.8K | 859K | Sep 1996 – Mar 2026 |
| Richter G-3-148926 | Faulconer Energy, LLC only | Mott Slough (Yegua) | Wharton | 1 | 36.2K | 1.56M | Feb 1994 – Apr 2026 |
| Zboril, Henry G-3-130032 | Faulconer Energy, LLC only | Mott Slough (Yegua) | Wharton | 1 | 34.9K | 3.34M | Jan 1993 – Apr 2026 |
| White, William C. et Al G-3-150126 | Rutherford Oil Corporation only | Willow Slough,n.(nodosaria 9500) | Chambers | 1 | 29.9K | 819K | May 1994 – Nov 1999 |
| Runnells Gas Unit G-3-201102 | IV Standard, LLC only | Duncan Slough (Frio Cons.) | Matagorda | 1 | 29.7K | 4.72M | Nov 2003 – Apr 2026 |
| Pierce Est. Oil & Gas Ints. G-3-48189 | IV Standard, LLC only | Duncan Slough, S. (Frio, Lo.) | Matagorda | 1 | 26.8K | 1.92M | Sep 1993 – Apr 2026 |
| Lewis, J. C. "C" G-3-217099 | Atlas Operating LLC only | Duncan Slough (Frio Cons.) | Matagorda | 1 | 26.5K | 773K | Mar 2006 – Mar 2026 |
| Stovall, Guy F. Trust G-3-149968 | Viper S.W.D., LLC only | Mott Slough (Yegua) | Wharton | 1 | 23.1K | 441K | Jun 1994 – Sep 2022 |
| Allegro-Buckeye G-3-202774 | Gaither Petroleum Corporation only | Duncan Slough (Frio Cons.) | Matagorda | 1 | 22.4K | 1.1M | Feb 2004 – Nov 2014 |
| Lewis, J. C., -C- G-3-6039 | Expro Engineering, Inc. only | Duncan Slough (Frio-2) | Matagorda | 1 | 21.6K | 471K | Jan 1993 – Feb 2006 |
| Ticonderoga Gas Unit B G-3-281398 | Magnum Producing, LP only | Maple Slough (Upper Wilcox Cons) | Hardin | 1 | 20.7K | 55.8K | Jul 2015 – Jul 2016 |
| Federal Land Bank of Texas G-3-150653 | Swift Energy Company only | Willow Slough (FB-B, Hack-A) | Chambers | 1 | 20K | 1.8M | Aug 1994 – Dec 1997 |
| Zboril, Henry G-3-130570 | Faulconer, Vernon E., Inc. only | Mott Slough (Yegua) | Wharton | 1 | 18.7K | 2.29M | Jan 1993 – Feb 2016 |
| Srubar, Dorothy G-3-127749 | Faulconer Energy, LLC only | Mott Slough (Yegua) | Wharton | 1 | 17.6K | 2.27M | Jan 1993 – Apr 2026 |
| Buckeye Ranch Unit G-3-271146 | Tri-C Resources Partners I, LLC only | Duncan Slough (Frio Cons.) | Matagorda | 1 | 17.2K | 312K | Oct 2013 – Apr 2024 |
| Lewis, J. C. G-3-153266 | Expro Engineering, Inc. only | Duncan Slough (Frio-8) | Matagorda | 1 | 13.7K | 689K | Feb 1995 – Jul 2000 |
| Steele, L. M. Trust G-3-130044 | Amrwr, LLC only | Duncan Slough, SW (Frio 7) | Matagorda | 1 | 12.7K | 3.08M | Jan 1993 – May 2011 |
| Wakefield G-3-267028 | Gcows Operating LLC only | Willow Slough (FB-B, UN 2) | Chambers | 1 | 10.5K | 2.06M | May 2012 – Apr 2026 |
| Slough, Henry G-14-21763 | Far West Development, LLC only | Bechthold (Tonkawa) | Lipscomb | 1 | 10.1K | 358K | Jan 1993 – Mar 2023 |
| Pierce Estates G-3-51155 | Bushmaster Production Comp, LLC only | Duncan Slough, SE. (Frio Lo.) | Matagorda | 1 | 10K | 696K | Jan 1993 – Mar 2026 |
| Santos-Lewis GU G-3-188108 | Gaither Petroleum Corporation only | Duncan Slough (Frio Cons.) | Matagorda | 1 | 9.83K | 249K | Feb 2002 – Sep 2005 |
| Naiser, J. E. Estate G-3-133377 | Faulconer Energy, LLC only | Mott Slough (Yegua) | Wharton | 1 | 9.41K | 2.76M | Jan 1993 – Apr 2026 |
| Lewis, J. C. G-3-214657 | Atlas Operating LLC only | Duncan Slough (Frio Cons.) | Matagorda | 1 | 7.19K | 166K | Nov 2005 – Mar 2026 |
| Cornelius G-3-186895 | San Isidro Development Co, L. C. only | Elliott Slough (Frio, Lower) | Matagorda | 1 | 7.04K | 79.7K | Jun 2001 – Nov 2008 |
| Brownson Home G-3-139526 | Chief Petroleum Company only | Chaco Slough (8130) | Wharton | 1 | 5.79K | 187K | Jan 1993 – Jan 1994 |
| Zboril-Bourland G-3-133687 | Faulconer, Vernon E., Inc. only | Mott Slough (Yegua) | Wharton | 1 | 5.35K | 841K | Jan 1993 – Oct 2011 |
| Runnells Gas Unit 1 G-3-253410 | IV Standard, LLC only | Duncan Slough (Frio Cons.) | Matagorda | 1 | 4.84K | 393K | Aug 2009 – Nov 2019 |
| Hahn Estate G-3-227324 | Denali Oil & Gas Management, LLC only | Hardeman Slough | Matagorda | 1 | 4.45K | 819K | Mar 2007 – Jul 2010 |
| Barrow, R. J. G-3-206884 | Gcows Operating LLC only | Willow Slough (FB-B, Hack-A) | Chambers | 1 | 3.45K | 700K | Feb 2005 – Apr 2026 |
| Pavlik G-3-147123 | Brayton Operating Corp. only | Mott Slough (Yegua) | Wharton | 1 | 3.42K | 99.7K | Sep 1993 – Sep 1994 |
| Baylor University et Al G-3-137544 | Viper S.W.D., LLC only | Mott Slough (Yegua) | Wharton | 1 | 3.22K | 561K | Jan 1993 – Aug 2014 |
| White, J. T. Estate "B" G-3-207046 | Denbury Onshore, LLC only | Willow Slough, N. (W. Fault F-1) | Chambers | 1 | 3.14K | 841K | Feb 2005 – Apr 2011 |
| Srubar, Dorothy G-3-133453 | Eex Corporation only | Mott Slough (Yegua) | Wharton | 1 | 3.11K | 171K | Jan 1993 – Jan 1995 |
| Lewis, J. C. G-3-212981 | Atlas Operating LLC only | Duncan Slough (Frio Cons.) | Matagorda | 1 | 2.78K | 137K | Jan 2001 – Jul 2009 |
| White, J. T. Estate "B" G-3-204724 | Denbury Onshore, LLC only | Willow Slough, N. (W. Fault F-1) | Chambers | 1 | 2.4K | 780K | Dec 2004 – Apr 2011 |
| White, J. T. G-3-236346 | Denbury Onshore, LLC only | Willow Slough (Nod. B-1) | Chambers | 1 | 1.98K | 50.2K | May 2008 – Sep 2008 |
| Long Branch Slough G-8-198323 | Cholla Petroleum, Inc. only | Burns-Dalton(marble Falls) | Palo Pinto | 1 | 1.58K | 470K | Sep 2003 – Nov 2017 |
| Tate, R.R. G-3-72452 | Gcows Operating LLC only | Willow Slough (FB-a, F-1) | Chambers | 1 | 1.55K | 795K | Jan 1993 – Apr 2026 |
| Ticonderoga Gas Unit D G-3-281490 | Magnum Producing, LP only | Maple Slough (Upper Wilcox Cons) | Hardin | 1 | 1.54K | 18.8K | May 2016 – Sep 2016 |
| Stoddard-Lewis Unit G-3-147005 | Atlas Operating LLC only | Duncan Slough (Frio Cons.) | Matagorda | 1 | 1.46K | 66.1K | May 1993 – Nov 1996 |
| Naiser, W. J. & J. E. et Al G-3-131684 | Hughes, Dan A. Company only | Mott Slough (Yegua) | Wharton | 1 | 1.38K | 35.1K | Jan 1993 – Mar 1994 |