| Mobley Gas Unit G-6-180403 | Valence Operating Company only | Blocker (Cotton Valley) | Harrison | 1 | 4.57K | 792K | Oct 2000 – May 2009 |
| Dorsett, W.N. Gas Unit G-6-139908 | Mmgl East Texas III, LLC only | Blocker (Cotton Valley) | Harrison | 1 | 4.56K | 995K | Jan 1993 – Apr 2026 |
| George, T.W. Gas Unit "B" G-6-138806 | Sponte Operating, Inc. only | Blocker (Cotton Valley) | Harrison | 1 | 4.56K | 1.32M | Jan 1993 – Jan 2019 |
| Fields, Isaiah Jr. GU G-6-96850 | Sabine Energy Inc. only | Blocker (Cotton Valley) | Harrison | 1 | 4.55K | 594K | Jan 1993 – Apr 2026 |
| Resch, Kathleen M. G-6-204310 | Mmgl East Texas III, LLC only | Blocker (Cotton Valley) | Harrison | 1 | 4.53K | 1.29M | Jul 2004 – Nov 2025 |
| Runnels, Mack V. Gas Unit G-6-89308 | BP America Production Company only | Blocker (Cotton Valley) | Harrison | 1 | 4.52K | 977K | Jan 1993 – Jun 2021 |
| Pepper Gas Unit 1 G-6-222337 | Fortune Resources LLC only | Blocker (Cotton Valley) | Harrison | 1 | 4.52K | 874K | Aug 2006 – Mar 2026 |
| Mobley Gas Unit G-6-176536 | Valence Operating Company only | Blocker (Cotton Valley) | Harrison | 1 | 4.52K | 759K | Dec 1999 – May 2008 |
| Ware Gas Unit -A- G-6-142030 | BP America Production Company only | Blocker (Cotton Valley) | Harrison | 1 | 4.5K | 1.01M | Jan 1993 – Aug 2013 |
| Hall, G. T. O-10-28371 | Bald Eagle Operating Inc. only | Block a-34 (Yates) | Andrews | 1 | 4.49K | 3.76K | Feb 1994 – Sep 2025 |
| State Tract 98-L G-3-188834 | Coastland Operations, LLC only | Block 98-L (MA-4A) | High IS-LB | 1 | 4.49K | 652K | Jan 2002 – Nov 2002 |
| Woods "B" G-6-184364 | Brookston Energy, Inc. only | Blocker (Cotton Valley) | Harrison | 1 | 4.48K | 892K | Jul 2001 – Apr 2026 |
| Ice 24 O-10-62880 | Williams Oil Company only | Estes Block 34 (Wolfcamp, Gas) | Ward | 1 | 4.47K | 35.1K | Feb 2025 – Apr 2026 |
| Dudeck Heirs Gas Unit G-6-179093 | Mmgl East Texas III, LLC only | Blocker (Cotton Valley) | Harrison | 1 | 4.47K | 1.1M | Jun 2000 – Apr 2026 |
| Woods "B" G-6-134439 | Brookston Energy, Inc. only | Blocker (Cotton Valley) | Harrison | 1 | 4.46K | 1.16M | Jan 1993 – Apr 2026 |
| Hall, G. T. -A- O-10-26216 | Bald Eagle Operating Inc. only | Block a-34 (Yates) | Andrews | 1 | 4.45K | 5.9K | Feb 1994 – Dec 2025 |
| Runnels, Mack V. Gas Unit G-6-177727 | Mmgl East Texas III, LLC only | Blocker (Cotton Valley) | Harrison | 1 | 4.44K | 856K | Apr 2000 – Jan 2020 |
| Brown, Katherine J. Gas Unit G-6-87531 | Mmgl East Texas III, LLC only | Blocker (Cotton Valley) | Harrison | 1 | 4.42K | 996K | Jan 1993 – Apr 2026 |
| Block 31 Unit G-10-287037 | Hilcorp Energy Company only | Block 31 (Devonian) | Crane | 1 | 4.42K | 212K | May 2019 – Oct 2024 |
| 12TH Man State O-10-45342 | Vin Fisher Operating, Inc. only | Block a-34, Northwest (Glorieta) | Andrews | 1 | 4.41K | 0 | Aug 2014 – Jun 2015 |
| Allen, Lenora Gas Unit G-6-229542 | Spindletop Oil & Gas Company only | Blocker (Cotton Valley) | Harrison | 1 | 4.4K | 726K | Jun 2007 – Apr 2026 |
| Vann, Aurelia Gas Unit G-6-232792 | Mmgl East Texas III, LLC only | Blocker (Cotton Valley) | Harrison | 1 | 4.38K | 763K | Oct 2007 – Apr 2026 |
| Gross G-6-242879 | RFE Operating, LLC only | Blocker (Cotton Valley) | Harrison | 1 | 4.38K | 734K | Aug 2008 – Apr 2026 |
| University JF O-10-32411 | Union Oil Company of California only | University Block 9 (Penn.) | Andrews | 1 | 4.37K | 5.75K | Jan 1993 – May 1993 |
| Bath Gas Unit A G-6-227989 | Mmgl East Texas III, LLC only | Blocker (Cotton Valley) | Harrison | 1 | 4.37K | 564K | Mar 2007 – May 2012 |
| Hathaway, J. F. G-10-119482 | Two P Partners, LLC only | Estes Block 34 (Penn.) | Ward | 1 | 4.35K | 543K | Jan 1993 – Apr 2026 |
| UNIV6 HANNAH26 O-9-15928 | Henry Petroleum LP only | Block 4 (Penn) | Crockett | 1 | 4.34K | 2.78K | Mar 2006 – Nov 2006 |
| Woods "B" G-6-93285 | Brookston Energy, Inc. only | Blocker (Cotton Valley) | Harrison | 1 | 4.33K | 1.05M | Jan 1993 – Aug 2025 |
| Matthews, William Gas Unit G-6-179700 | BP America Production Company only | Blocker (Cotton Valley) | Harrison | 1 | 4.33K | 756K | Sep 2000 – Mar 2021 |
| Rosborough Gas Unit B G-6-90844 | Mmgl East Texas III, LLC only | Blocker (Cotton Valley) | Harrison | 1 | 4.33K | 975K | Jan 1993 – Jan 2026 |
| Resch, Kathleen M. G-6-211879 | Mmgl East Texas III, LLC only | Blocker (Cotton Valley) | Harrison | 1 | 4.31K | 848K | Apr 2005 – Apr 2026 |
| Riethmeyer,e. Gas Unit G-4-237386 | Block "T" Petroleum, Inc. only | Javelina (Vicksburg Cons.) | Hidalgo | 1 | 4.31K | 753K | Mar 2008 – Apr 2026 |
| Washington, Emanuel Gas Unit G-6-179118 | BPX Operating Company only | Blocker (Cotton Valley) | Harrison | 1 | 4.3K | 980K | Aug 2000 – Jul 2022 |
| McElroy Ranch Co. "G" G-9-171157 | Devon Energy Production Co, L.P. only | Block 42 (Penn) | Upton | 1 | 4.29K | 227K | Aug 1998 – Aug 2007 |
| Brown, Maude B. Gas Unit G-6-138814 | Mmgl East Texas III, LLC only | Blocker (Cotton Valley) | Harrison | 1 | 4.28K | 1.76M | Jan 1993 – Apr 2026 |
| Wyatt, C. A. Gas Unit G-6-99792 | Mmgl East Texas III, LLC only | Blocker (Cotton Valley) | Harrison | 1 | 4.27K | 542K | Jan 1993 – Apr 2026 |
| E. Riethmeyer Gas Unit G-4-251205 | Block "T" Petroleum, Inc. only | Javelina (Vicksburg Cons.) | Hidalgo | 1 | 4.23K | 789K | Sep 2008 – Apr 2026 |
| Thompson Gas Unit -B- G-6-139914 | Sponte Operating, Inc. only | Blocker (Cotton Valley) | Harrison | 1 | 4.21K | 667K | Jan 1993 – Jan 2007 |
| Harris-Munden GU G-6-227862 | Craton Operating LLC only | Blocker (Page) | Harrison | 1 | 4.21K | 397K | Mar 2007 – Nov 2023 |
| Brown, Katherine J. Gas Unit G-6-232511 | Mmgl East Texas III, LLC only | Blocker (Cotton Valley) | Harrison | 1 | 4.2K | 520K | Sep 2007 – Apr 2026 |
| University 38 G-10-211842 | Formentera Operations LLC only | Block 31 (Devonian) | Crane | 1 | 4.19K | 111K | Apr 2005 – Apr 2026 |
| Tutt, W. R. G-6-154068 | Valence Operating Company only | Blocker (Cotton Valley) | Harrison | 1 | 4.18K | 615K | Jan 1995 – Apr 2026 |
| Blocker-Ware G-6-62732 | Tanos Exploration II, LLC only | Bethany (Travis Peak) | Harrison | 1 | 4.14K | 201K | Jan 1993 – Mar 2011 |
| Ware Gas Unit -A- G-6-225290 | Mmgl East Texas III, LLC only | Blocker (Cotton Valley) | Harrison | 1 | 4.14K | 586K | Dec 2006 – Apr 2026 |
| Becker, Jossie Taylor Gas Unit G-6-232174 | Brammer Engineering, Inc. only | Blocker (Cotton Valley) | Harrison | 1 | 4.12K | 611K | Sep 2007 – Apr 2026 |
| Greer, Cecil B. Gas Unit G-6-141438 | Mmgl East Texas III, LLC only | Blocker (Cotton Valley) | Harrison | 1 | 4.12K | 650K | Jan 1993 – Aug 2018 |
| Vann, Aurelia Gas Unit G-6-232621 | Mmgl East Texas III, LLC only | Blocker (Cotton Valley) | Harrison | 1 | 4.11K | 990K | Oct 2007 – Apr 2026 |
| Pyote Gas Unit No. 1 G-10-44840 | XTO Energy Inc. only | Block 16 (Devonian) | Ward | 1 | 4.11K | 9.95M | Jan 1993 – Apr 2026 |
| Rosborough, Dr. J.F. Gas Unit G-6-232841 | Brookston Energy, Inc. only | Blocker (Cotton Valley) | Harrison | 1 | 4.09K | 805K | Oct 2007 – Apr 2026 |
| Cooper 49 G-10-183325 | XTO Energy Inc. only | Block 16 (Montoya) | Ward | 1 | 4.09K | 2.06M | Jan 2001 – Mar 2026 |