| Marshall, S. et Al G-4-159851 | Hilcorp Energy Company only | Benavides (Lobo Cons.) | Webb | 1 | 137K | 7.93M | Aug 1996 – Aug 2026 |
| Edward H. Seifert, et UX G-2-194166 | Remora Operating, LLC only | Marshall (Middle Wilcox) | Goliad | 1 | 111K | 4.99M | Mar 2003 – Aug 2024 |
| Marshall & Winston 78 G-14-280885 | BE Anadarko II, LLC only | Lipscomb, S.E. (Cleveland) | Hemphill | 1 | 108K | 847K | May 2015 – Aug 2026 |
| Bethke G-2-249063 | Nog Production & Operating LLC only | Marshall (Middle Wilcox) | Goliad | 1 | 95K | 2.45M | Nov 2008 – Jun 2020 |
| Robinson-Reaves G-2-185702 | Remora Operating, LLC only | Marshall (Middle Wilcox) | Goliad | 1 | 93K | 4.66M | Jun 2001 – Aug 2026 |
| Windberg, Dalhart G-2-200642 | Remora Operating, LLC only | Marshall (Middle Wilcox) | Goliad | 1 | 90.8K | 5.95M | Feb 2004 – Aug 2026 |
| Carmichael G-2-207936 | Remora Operating, LLC only | Marshall (Middle Wilcox) | Goliad | 1 | 83K | 2.27M | Oct 2004 – Aug 2026 |
| Marshall, Ruth G-3-148739 | Ocean Energy, Inc. only | San Leon (F-19) | Galveston | 1 | 75.8K | 2.69M | Feb 1994 – Feb 2001 |
| Carmichael G-2-201843 | Remora Operating, LLC only | Marshall (Middle Wilcox) | Goliad | 1 | 71.5K | 2.44M | Dec 2003 – Aug 2026 |
| Eichman Gas Unit G-2-211723 | Remora Operating, LLC only | Marshall (Middle Wilcox) | Goliad | 1 | 61.8K | 4.4M | Apr 2005 – Aug 2026 |
| Heard Unit G-2-214303 | Etoco, L.P. only | Marshall (Middle Wilcox) | Goliad | 1 | 61.4K | 3.27M | Jun 2005 – Mar 2020 |
| Heard G-2-209545 | Etoco, L.P. only | Marshall (Middle Wilcox) | Goliad | 1 | 61K | 2.91M | Jan 2005 – Feb 2016 |
| Marshall Brothers Trusts -C- GU G-3-152177 | Galloway Lone Star, L.L.C. only | Tomball, SE. (11700) | Harris | 1 | 52.1K | 3.24M | Dec 1994 – Jan 2011 |
| Hoff G-2-216246 | Remora Operating, LLC only | Marshall (Middle Wilcox) | Goliad | 1 | 51.1K | 1.75M | Sep 2005 – Apr 2022 |
| Zengerle Gas Unit G-2-227370 | Winn Exploration Co., Inc. only | Marshall (Middle Wilcox) | De Witt | 1 | 49.4K | 592K | Mar 2007 – Feb 2014 |
| Prewett, Marshall G-2-125785 | Virtex Operating Company, Inc. only | Yorktown, South (Wilcox 9930) | De Witt | 1 | 46.5K | 506K | by Jan 1993 – Jul 2013 |
| State Marshall G-4-203198 | Hilcorp Energy Company only | Kelsey (Frio Consol.) | Brooks | 1 | 43.4K | 459K | Jun 2004 – Aug 2026 |
| Roudon G-2-188866 | Nog Production & Operating LLC only | Marshall (Middle Wilcox) | Goliad | 1 | 41.5K | 2.13M | Jan 2002 – Jul 2026 |
| Windberg, Dalhart G-2-198681 | Remora Operating, LLC only | Marshall (Middle Wilcox) | Goliad | 1 | 39.9K | 2.01M | Aug 2003 – Aug 2026 |
| Windberg, Dalhart G-2-199096 | Remora Operating, LLC only | Marshall (Middle Wilcox) | Goliad | 1 | 38.3K | 2.28M | Sep 2003 – Aug 2026 |
| Morton 23 G-10-197666 | Marshall R. Young Operating, LLC only | A. C. Morton (Canyon Reef, Lo.) | Winkler | 1 | 36.3K | 1.69M | Oct 2002 – Jul 2026 |
| Bammert G-2-215482 | Remora Operating, LLC only | Marshall (Middle Wilcox) | Goliad | 1 | 35.6K | 866K | Jun 2005 – Apr 2022 |
| Marshall "B" G-2-200715 | Estate of James L. Nelson only | Slick, S. (Wilcox "J") | Goliad | 1 | 35.3K | 1.74M | May 2004 – Jul 2024 |
| Hoff, Georgia et Al G-2-195043 | Remora Operating, LLC only | Marshall (Middle Wilcox) | Goliad | 1 | 34.6K | 1.23M | Mar 2003 – Apr 2022 |
| Carmichael G-2-207929 | Remora Operating, LLC only | Marshall (Middle Wilcox) | Goliad | 1 | 33.2K | 895K | Aug 2004 – Aug 2026 |
| Hawkins Deep Gas Unit G-2-201842 | Remora Operating, LLC only | Marshall (Middle Wilcox) | Goliad | 1 | 33.2K | 2.86M | Jan 2004 – Oct 2006 |
| Roudon A G-2-220796 | Nog Production & Operating LLC only | Marshall (Middle Wilcox) | Goliad | 1 | 31.9K | 1.97M | Feb 2006 – Jul 2026 |
| Marshall, S. G. G-4-247791 | Mountain V Texas, LLC only | Pok - a - Dot (8600) | Zapata | 1 | 31.8K | 2.96M | Feb 2009 – Aug 2026 |
| McCaslin, G. M. Gas Unit O/A G-5-108961 | Marshall R. Young Operating, LLC only | Roundhouse (Haynesville) | Navarro | 1 | 30.5K | 1.32M | by Jan 1993 – Jul 2026 |
| Marshall Bros. Trust G. V. NO.1 G-3-82061 | Galloway Lone Star, L.L.C. only | Tomball, SE. (11700) | Harris | 1 | 30.4K | 1.6M | by Jan 1993 – Aug 2026 |
| South Marshall St Wells Fargo GU G-4-200503 | Mountain V Texas, LLC only | Tiffany (Wilcox Carrizo) | Webb | 1 | 30K | 2.56M | Feb 2004 – Aug 2026 |
| Georgia Hoff, et. Al. G-2-200771 | Remora Operating, LLC only | Marshall (Middle Wilcox) | Goliad | 1 | 29.8K | 1.32M | Sep 2003 – May 2017 |
| Marshall, S.G. G-4-123171 | Mountain V Texas, LLC only | Pok - a - Dot (8600) | Zapata | 1 | 29.2K | 2.9M | by Jan 1993 – Aug 2026 |
| Marshall, S. G. G-4-174672 | Mountain V Texas, LLC only | Pok - a - Dot (8600) | Zapata | 1 | 29.1K | 3.75M | Sep 1999 – Aug 2026 |
| Marshall & Winston 77 G-14-281723 | BE Anadarko II, LLC only | Lipscomb, S.E. (Cleveland) | Hemphill | 1 | 28.7K | 135K | Jan 2015 – Aug 2026 |
| Whipp G-2-216661 | Etoco, L.P. only | Marshall (Middle Wilcox) | Goliad | 1 | 27.9K | 661K | Sep 2005 – Mar 2017 |
| Hawkins Deep GU G-2-218321 | Remora Operating, LLC only | Marshall (Middle Wilcox) | Goliad | 1 | 27.8K | 2.1M | Aug 2005 – Aug 2026 |
| Seifert, Edward H. et UX G-2-193281 | Remora Operating, LLC only | Marshall (Middle Wilcox) | Goliad | 1 | 27.7K | 1.04M | Dec 2002 – Mar 2026 |
| Alford "A" G-6-141699 | Marshall R. Young Operating, LLC only | Minden (Travis Peak Cons.) | Rusk | 1 | 27.4K | 1.62M | by Jan 1993 – Jul 2026 |
| Morton 23 G-10-188909 | Marshall R. Young Operating, LLC only | A. C. Morton (Canyon Reef, Lo.) | Winkler | 1 | 27.3K | 1.4M | Nov 2001 – Jul 2026 |
| Robinson-Reaves G-2-216437 | Remora Operating, LLC only | Marshall (Middle Wilcox) | Goliad | 1 | 25.9K | 2.08M | Sep 2004 – Aug 2026 |
| Bammert G-2-206412 | Remora Operating, LLC only | Marshall (Middle Wilcox) | Goliad | 1 | 25.7K | 888K | Nov 2004 – Apr 2022 |
| Robinson-Reaves G-2-216446 | Remora Operating, LLC only | Marshall (Middle Wilcox) | Goliad | 1 | 25.2K | 3.17M | Jun 2005 – Aug 2026 |
| Fuller G-2-223745 | Nog Production & Operating LLC only | Marshall (Middle Wilcox) | Goliad | 1 | 25.1K | 2.86M | May 2006 – Jul 2026 |
| Homer G-2-215080 | Hilcorp Energy Company only | Marshall (Middle Wilcox) | Goliad | 1 | 24K | 1.14M | Mar 2005 – Sep 2014 |
| Bammert G-2-200768 | Remora Operating, LLC only | Marshall (Middle Wilcox) | Goliad | 1 | 23.9K | 831K | Nov 2003 – May 2019 |
| Bammert G-2-207638 | Remora Operating, LLC only | Marshall (Middle Wilcox) | Goliad | 1 | 23K | 860K | Jul 2004 – Jul 2020 |
| South Marshall State-Wells Fargo G-4-219522 | Mountain V Texas, LLC only | Tiffany (Wilcox Carrizo) | Webb | 1 | 22.5K | 3.2M | May 2006 – Aug 2026 |
| Marshall Brothers Trust GU G-3-162216 | Galloway Lone Star, L.L.C. only | Tomball, SE. (11700) | Harris | 1 | 21.4K | 1.47M | Jan 1997 – Aug 2026 |
| Duderstadt, Darwyn Et.al. G-2-188647 | Cabeza Oil and Gas, LLC only | Marshall (Middle Wilcox) | Goliad | 1 | 21.4K | 852K | Jan 2002 – Oct 2009 |