| State of Texas -FW- O-10-32326 | Jetta Operating Company, Inc. only | Block 17, Southeast (Delaware) | Ward | 1 | 7.55K | 50.6K | Jan 1993 – May 2004 |
| Waldron, M L GU 1 G-6-100099 | Neg Operating LLC only | Blocker (Cotton Valley) | Harrison | 1 | 7.51K | 578K | Jan 1993 – Feb 2006 |
| Block 76 Unit G-2-133397 | Hedrick Production Inc. only | Clayton (Wilcox 7360) | Live Oak | 1 | 7.49K | 125K | Jan 1993 – Mar 2026 |
| King O-10-35985 | Kidd Johnson Oil & Gas, LLC only | Block 31 (Queen) | Crane | 1 | 7.49K | 6.41K | Mar 1999 – Apr 2023 |
| Block 86 Unit G-2-57692 | Hedrick Production Inc. only | Clayton (Block 86 SD) | Live Oak | 1 | 7.45K | 387K | Jan 1993 – Nov 1998 |
| Young, Delcia M. -B- G-6-205769 | Mmgl East Texas III, LLC only | Blocker (Cotton Valley) | Harrison | 1 | 7.45K | 964K | Sep 2004 – Jun 2021 |
| George, T.W. Gas Unit "B" G-6-178955 | Mmgl East Texas III, LLC only | Blocker (Cotton Valley) | Harrison | 1 | 7.44K | 690K | Jul 2000 – Apr 2026 |
| Young, Delcia M. -B- G-6-223148 | Mmgl East Texas III, LLC only | Blocker (Cotton Valley) | Harrison | 1 | 7.42K | 815K | Sep 2006 – Mar 2022 |
| University 10-18 "B" G-10-157394 | Texaco E & P Inc. only | Block 18 (Cherry Canyon) | Ward | 1 | 7.4K | 284K | Feb 1996 – Jan 2001 |
| Roden, Mary L. Gas Unit G-6-227895 | Mmgl East Texas III, LLC only | Blocker (Cotton Valley) | Harrison | 1 | 7.39K | 1.37M | Jan 2007 – Apr 2026 |
| Harris, James Gas Unit G-6-251592 | Valence Operating Company only | Blocker (Cotton Valley) | Harrison | 1 | 7.39K | 410K | Jul 2009 – Nov 2016 |
| Bath Gas Unit "B" G-6-177831 | Mmgl East Texas III, LLC only | Blocker (Cotton Valley) | Harrison | 1 | 7.38K | 865K | May 2000 – Apr 2026 |
| University 9 -AA- O-10-32362 | XTO Energy Inc. only | University Block 9 (Penn.) | Andrews | 1 | 7.33K | 3.95K | Jan 1993 – Oct 1998 |
| Block/Guerra Gas Unit G-4-148549 | Caribbean Energy LLC II only | Arroyo Los Olmos (Yegua 25) | Starr | 1 | 7.25K | 1.09M | Dec 1993 – Mar 2026 |
| Thompson, J. Philip Gas Unit G-6-141232 | Mmgl East Texas III, LLC only | Blocker (Cotton Valley) | Harrison | 1 | 7.23K | 1.85M | Jan 1993 – Apr 2026 |
| Block 85 Unit G-2-132586 | Sheridan Energy,inc. only | Clayton (Block 86 SD) | Live Oak | 1 | 7.23K | 343K | Jan 1993 – Feb 1998 |
| Pyote Gas Unit 11 G-10-188350 | XTO Energy Inc. only | Block 16 (Montoya) | Ward | 1 | 7.21K | 1.31M | Dec 2001 – Mar 2026 |
| Brewster Gas Unit G-6-223619 | Mmgl East Texas III, LLC only | Blocker (Cotton Valley) | Harrison | 1 | 7.17K | 774K | Oct 2006 – Apr 2026 |
| University Block 42 O-9-14693 | EOG Resources, Inc. only | Redemption (Ellenburger) | Crockett | 1 | 7.15K | 75.7K | Oct 1997 – Jan 2007 |
| Justice Gas Unit G-6-93283 | Mmgl East Texas III, LLC only | Blocker (Cotton Valley) | Harrison | 1 | 7.15K | 581K | Jan 1993 – Apr 2026 |
| Thompson, J. Phillip Gas Unit G-6-178651 | Mmgl East Texas III, LLC only | Blocker (Cotton Valley) | Harrison | 1 | 7.11K | 958K | May 2000 – Apr 2026 |
| Knackstedt, G.C. Gas Unit G-6-167894 | Mmgl East Texas III, LLC only | Blocker (Cotton Valley) | Harrison | 1 | 7.09K | 1.03M | Feb 1998 – Apr 2026 |
| University B O-9-13271 | Reliance Energy, Inc. only | Block 38 (Ellenburger) | Crockett | 1 | 7.06K | 14.5K | Jan 1993 – Jun 1995 |
| University 16-33 O-10-42159 | Sheridan Production Company, LLC only | Block 16 (Cherry Canyon) | Ward | 1 | 7.05K | 7.13K | Dec 2011 – Jul 2013 |
| Phillips University DD O-10-31393 | Morningstar Operating LLC only | University Block 9 (Penn.) | Andrews | 3 | 7.01K | 3.02K | Jan 1993 – Apr 1994 |
| Cothes O-10-34166 | Abarta Oil & Gas Co., Inc. only | Block a-34, Northwest (Glorieta) | Andrews | 3 | 7K | 63 | May 1994 – Aug 1999 |
| 7810 JV-P Corner -D- O-10-28210 | BTA Oil Producers only | University Block 6 (Devonian) | Gaines | 1 | 7K | 321 | Jan 1993 – Jul 1995 |
| Ware Gas Unit -A- G-6-222299 | Mmgl East Texas III, LLC only | Blocker (Cotton Valley) | Harrison | 1 | 6.97K | 813K | Jul 2006 – Feb 2019 |
| JV-S 7211 Block 16 O-10-36749 | Abraxas Petroleum Corporation only | Block 16 (Permo Penn) | Ward | 1 | 6.97K | 17.7K | Sep 2001 – Aug 2015 |
| Block, Anna G-4-63918 | Columbus Energy, LLC only | Laredo (Lobo) | Webb | 1 | 6.97K | 506K | Jan 1993 – Apr 2026 |
| State "XA" O-10-27644 | Prize Operating Company only | Block 17, Southeast (Delaware) | Ward | 1 | 6.93K | 25.8K | Jan 1993 – Feb 2000 |
| Resch Gas Unit "B" G-6-225314 | Mmgl East Texas III, LLC only | Blocker (Cotton Valley) | Harrison | 1 | 6.93K | 1.03M | Nov 2006 – Apr 2026 |
| Block 85 Unit G-2-139134 | Hedrick Production Inc. only | Clayton (Wilcox 7360) | Live Oak | 1 | 6.9K | 215K | Jan 1993 – Mar 2026 |
| University 22 O-10-37391 | Momentum Energy Corporation only | Block 5 (Devonian) | Andrews | 1 | 6.88K | 0 | Mar 2004 – Mar 2005 |
| Martin, W.H. "B" O-10-24872 | N & B Oil and Gas LLC only | Estes Block 34 (Penn.) | Ward | 1 | 6.82K | 349K | Jan 1993 – Apr 2026 |
| Brune-Burnett -C- Gas Unit G-6-98270 | BP America Production Company only | Blocker (Cotton Valley) | Harrison | 1 | 6.82K | 544K | Jan 1993 – Nov 2016 |
| UNIVBLOCK13 4 O-9-15971 | Henry Petroleum LP only | Block 4 (Penn) | Crockett | 1 | 6.81K | 6.93K | Dec 2005 – Nov 2006 |
| Bruce G-6-116788 | Sabine Oil & Gas Corporation only | Blocker (Travis Peak) | Harrison | 1 | 6.77K | 1.74M | Jan 1993 – May 2018 |
| Brewster Gas Unit G-6-222208 | BPX Operating Company only | Blocker (Cotton Valley) | Harrison | 1 | 6.76K | 856K | Jun 2006 – Jan 2019 |
| Daniels "a" Gas Unit G-6-217842 | TGNR East Texas II LLC only | Blocker (Cotton Valley) | Harrison | 1 | 6.75K | 822K | Jan 2006 – Apr 2026 |
| Parish, Joseph G-6-227769 | RFE Operating, LLC only | Blocker (Cotton Valley) | Harrison | 1 | 6.75K | 692K | May 2007 – Apr 2026 |
| Orion O-10-51563 | Ring Energy, Inc. only | Block a-34 (San Andres) | Gaines | 1 | 6.74K | 558 | May 2018 – Dec 2018 |
| Block 75 Unit O-1-7867 | Shefts & Shefts, Inc. only | Salt Flat | Caldwell | 1 | 6.72K | 7.67K | Jan 1993 – Apr 2024 |
| Vann, Aurelia Gas Unit G-6-138732 | Mmgl East Texas III, LLC only | Blocker (Cotton Valley) | Harrison | 1 | 6.71K | 1.11M | Jan 1993 – Apr 2026 |
| Brewster Gas Unit G-6-221970 | Mmgl East Texas III, LLC only | Blocker (Cotton Valley) | Harrison | 1 | 6.7K | 766K | May 2006 – Jan 2016 |
| George, T.W. Gas Unit "B" G-6-142301 | Mmgl East Texas III, LLC only | Blocker (Cotton Valley) | Harrison | 1 | 6.7K | 1.62M | Jan 1993 – Apr 2026 |
| East Side Block Unit G-4-82838 | Wallis Energy, Inc. only | Agua Dulce (Vicksburg Consl.) | Nueces | 1 | 6.66K | 630K | Jan 1993 – Apr 2026 |
| University D O-10-34320 | Oilfield Management, Inc. (A) only | Block 6 (Strawn) | Andrews | 1 | 6.66K | 27.1K | Nov 1994 – Apr 1995 |
| High Island 24L (SL59455) G-3-150773 | Jefferson Block 24 Oil & Gas LLC only | High Is. Blk. 24L (FB-B, GP) | High IS-LB | 1 | 6.64K | 622K | Jun 1994 – Jan 1995 |
| Gross G-6-212493 | RFE Operating, LLC only | Blocker (Cotton Valley) | Harrison | 1 | 6.59K | 653K | May 2005 – Sep 2024 |