| Harris-Munden GU G-6-262594 | Craton Operating LLC only | Blocker (Cotton Valley) | Harrison | 1 | 1.91K | 241K | Aug 2011 – Aug 2023 |
| Block 71 Unit G-2-154410 | Bay Rock Operating Company only | Clayton (Slick 6450) | Live Oak | 1 | 1.91K | 356K | Jul 1994 – Apr 2012 |
| Block 31 Unit G-10-279629 | Hilcorp Energy Company only | Block 31 (Devonian) | Crane | 1 | 1.9K | 249K | Oct 2015 – Apr 2026 |
| Ruby O-9-18449 | Callon Petroleum Operating Co only | Block 4 (Devonian) | Upton | 1 | 1.9K | 4.26K | Dec 2013 – Oct 2014 |
| UNIVBLOCK13 4 O-9-16141 | Henry Petroleum LP only | Sheep Mountain (Consolidated) | Crockett | 1 | 1.9K | 1.46K | Dec 2006 – Dec 2007 |
| Dorsett G-6-127046 | Winchester Production Company only | Blocker (Page) | Harrison | 1 | 1.9K | 277K | Jan 1993 – Dec 2001 |
| Harris-Munden GU G-6-213032 | Craton Operating LLC only | Blocker (Cotton Valley) | Harrison | 1 | 1.88K | 270K | Jan 2005 – Jun 2017 |
| Wolfe -C- O-10-30809 | Western Reserves Oil Company Inc only | Block a-28 (Wichita-Albany) | Gaines | 1 | 1.86K | 3.45K | Jan 1993 – Jul 1996 |
| Bartlett-Bailey Gas Unit #1 G-6-213530 | Walkabout Operating, LLC only | Blocker (Cotton Valley) | Harrison | 1 | 1.86K | 448K | Jul 2005 – Aug 2025 |
| University Lands "15" O-10-37006 | Vision Oil and Gas LLC only | Block 31 (Grayburg) | Crane | 1 | 1.86K | 69.9K | Nov 2002 – Jan 2023 |
| Armstrong O-10-52032 | Vin Fisher Operating, Inc. only | Block a-34 (San Andres) | Andrews | 1 | 1.85K | 0 | Jul 2019 – Dec 2025 |
| Cook Gas Unit G-6-223258 | Fortune Resources LLC only | Blocker (Cotton Valley) | Harrison | 1 | 1.85K | 495K | Jun 2006 – Mar 2026 |
| University 38 A G-10-166462 | Formentera Operations LLC only | Block 31 (Queen) | Crane | 1 | 1.85K | 138K | Jan 1998 – Feb 2017 |
| Block 31 Unit G-10-295286 | Hilcorp Energy Company only | Block 31 (Devonian) | Crane | 1 | 1.82K | 314K | May 2023 – Apr 2026 |
| Parker, J.E. -AC- O-10-30711 | Union Oil Company of California only | University Block 9 (Penn.) | Andrews | 2 | 1.82K | 2.53K | Jan 1993 – Jun 1993 |
| University -35- A G-10-165881 | Formentera Operations LLC only | Block 31 (Queen) | Crane | 1 | 1.82K | 166K | Nov 1997 – Feb 2017 |
| Resch Gas Unit "B" G-6-153538 | Mmgl East Texas III, LLC only | Blocker (Cotton Valley) | Harrison | 1 | 1.82K | 514K | Feb 1995 – Jun 2011 |
| Knackstedt, G.C. Gas Unit G-6-140337 | Mmgl East Texas III, LLC only | Blocker (Cotton Valley) | Harrison | 1 | 1.81K | 1.31M | Jan 1993 – Apr 2026 |
| Watson, L. A. et al B G-10-66495 | XTO Energy Inc. only | Block 16 (Montoya) | Ward | 1 | 1.8K | 754K | Jan 1993 – Apr 2026 |
| Blalock "A" G-6-226575 | Sabine Oil & Gas Corporation only | Blocker (Cotton Valley) | Harrison | 1 | 1.8K | 495K | Feb 2007 – Apr 2018 |
| Blocker Heirs (Sun) O-6-12823 | Enpower Resources Inc. only | Blocker (Richardson Sand) | Harrison | 1 | 1.78K | 0 | Dec 1994 – Jun 2004 |
| Campbell Estate et Al G-10-191733 | XTO Energy Inc. only | Block 16 (Montoya) | Ward | 1 | 1.75K | 1.41M | May 2002 – Nov 2004 |
| Mosley, Thelma Gas Unit G-6-230270 | Mmgl East Texas III, LLC only | Blocker (Cotton Valley) | Harrison | 1 | 1.74K | 336K | Jun 2007 – Mar 2016 |
| Blalock "A" G-6-207702 | Sabine Energy Inc. only | Blocker (Cotton Valley) | Harrison | 1 | 1.73K | 497K | Dec 2004 – Apr 2026 |
| University "F" O-10-39283 | Nadel and Gussman Permian,l.l.c. only | University Block 9 (Penn.) | Andrews | 1 | 1.72K | 892 | Jun 2008 – Sep 2013 |
| Block 56-L S/2, SE/4 G-3-208600 | Seiran E & P Company, LLC only | High Island BLK.55-L (Disc. B-4) | High IS-LB | 1 | 1.71K | 1.9M | Oct 2004 – Nov 2006 |
| Block 31 Unit G-10-279531 | Hilcorp Energy Company only | Block 31 (Devonian) | Crane | 1 | 1.71K | 266K | Oct 2015 – Apr 2026 |
| High Island 24L SL 59456 G-3-162015 | Jefferson Block 24 Oil & Gas LLC only | High Is. Blk. 24L (FB-E, IG) | High IS-LB | 1 | 1.7K | 2.87M | Nov 1996 – Apr 2002 |
| Block, Anna G-4-61897 | Columbus Energy, LLC only | Laredo (Lobo) | Webb | 1 | 1.7K | 779K | Jan 1993 – Apr 2026 |
| Canon -51- O-10-25665 | Bledsoe Partners, Inc. only | Block a-2 (Strawn) | Pecos | 1 | 1.7K | 161 | Jan 1993 – May 1994 |
| McElroy Ranch Co. "F" G-9-143620 | Umc Petroleum Corporation only | Block 42 (Penn) | Upton | 1 | 1.69K | 194K | Jan 1993 – Sep 1997 |
| Blocker Heirs G-6-222815 | Enpower Resources Inc. only | Carthage, North (Cotton Valley) | Harrison | 1 | 1.68K | 185K | Jan 2005 – Dec 2019 |
| Amis Gas Unit G-6-92748 | Mmgl East Texas III, LLC only | Blocker (Cotton Valley) | Harrison | 1 | 1.66K | 466K | Jan 1993 – Apr 2026 |
| Washington,e.w. Heirs Gas Unit 1 G-6-223760 | TGNR East Texas II LLC only | Blocker (Cotton Valley) | Harrison | 1 | 1.66K | 759K | Oct 2006 – Apr 2026 |
| Barron, Beachy O-11-60270 | BC Operating, Inc. only | Block 35 (Dean Sd.) | Dawson | 1 | 1.65K | 402 | Jan 1993 – Apr 1996 |
| Polly Brown et Al G-4-167923 | Magnum Producing, LP only | Estes Cove (E-1, Fault Block B) | Aransas | 1 | 1.64K | 245K | Feb 1998 – Aug 2011 |
| Coats Gas Unit G-6-93528 | Mmgl East Texas III, LLC only | Blocker (Cotton Valley) | Harrison | 1 | 1.62K | 447K | Jan 1993 – Oct 2015 |
| Block 75 Unit G-2-281627 | Hedrick Production Inc. only | Clayton (Massive) | Live Oak | 1 | 1.61K | 223K | Jul 2015 – Mar 2026 |
| Block 31 Unit G-10-167927 | Hilcorp Energy Company only | Block 31 (Queen) | Crane | 1 | 1.6K | 88.1K | Feb 1998 – Apr 2026 |
| McSwain O-11-69840 | Burk Royalty Co., Ltd. only | Block D (Devonian) | Yoakum | 1 | 1.58K | 87 | Feb 2012 – Jun 2012 |
| Blocker Heirs G-6-239114 | Enpower Resources Inc. only | Carthage, North (Cotton Valley) | Harrison | 1 | 1.58K | 272K | Apr 2008 – Oct 2025 |
| Blalock "A" G-6-222254 | Sabine Oil & Gas Corporation only | Blocker (Cotton Valley) | Harrison | 1 | 1.58K | 343K | Jul 2006 – Dec 2015 |
| Block 31 Unit G-10-288878 | Hilcorp Energy Company only | Block 31 (Devonian) | Crane | 1 | 1.57K | 112K | May 2018 – Jan 2023 |
| Richter, Louis O-10-23103 | Mr Oil Company only | Estes Block 34 (Penn.) | Ward | 1 | 1.57K | 22.9K | Jan 1993 – May 1994 |
| Block 31 Unit G-10-286779 | Hilcorp Energy Company only | Block 31 (Devonian) | Crane | 1 | 1.56K | 624K | Mar 2019 – Apr 2026 |
| Blalock "A" G-6-95669 | NFR Energy, LLC only | Blocker (Cotton Valley) | Harrison | 1 | 1.56K | 354K | Jan 1993 – Oct 2011 |
| Finklea Gas Unit G-6-223966 | TGNR East Texas II LLC only | Blocker (Cotton Valley) | Harrison | 1 | 1.55K | 390K | Oct 2006 – Aug 2014 |
| State Tract 659-L NW/4 O-2-6498 | White Marlin Operating Co, LLC only | Matagorda Block 629 (Playa C) | Matgrda IS-LB | 1 | 1.55K | 0 | Dec 2000 – Jun 2001 |
| Block 31 Unit G-10-279499 | Hilcorp Energy Company only | Block 31 (Devonian) | Crane | 1 | 1.54K | 462K | Oct 2015 – Apr 2026 |
| State Tract 335-L SW/4 G-3-133913 | Fairways Spec. Sales & Serv Inc only | Brazos Block 335-L (7100) | Brazos-LB | 1 | 1.54K | 1.21M | Jan 1993 – Nov 1995 |