| University Block 33 17 & 18 G.U. G-9-143883 | DJH Oil & Gas LLC only | Howards Creek (Canyon) | Crockett | 1 | 4.08K | 530K | Jan 1993 – Jan 2022 |
| Bell, C. W. GU 1 G-6-96271 | Soldier Creek Energy, LLC only | Blocker (Cotton Valley) | Harrison | 1 | 4.07K | 560K | Jan 1993 – Apr 2026 |
| Harris-Munden GU G-6-213726 | Craton Operating LLC only | Blocker (Cotton Valley) | Harrison | 1 | 4.04K | 555K | Jan 2005 – Apr 2016 |
| Cothes "B" O-10-34836 | Abarta Oil & Gas Co., Inc. only | Block a-34, Northwest (Glorieta) | Andrews | 1 | 4.03K | 38 | Mar 1996 – Nov 1999 |
| Resch, Kathleen M. G-6-142020 | BP America Production Company only | Blocker (Cotton Valley) | Harrison | 1 | 4.03K | 1.33M | Jan 1993 – Oct 2017 |
| Block, B O-14-98 | WO Operating Company only | Panhandle Carson County Field | Carson | 8 | 4.02K | 11.3K | Jan 1993 – Aug 1994 |
| Mobley Gas Unit G-6-235167 | Valence Operating Company only | Blocker (Cotton Valley) | Harrison | 1 | 4.01K | 1.21M | Jan 2008 – Apr 2026 |
| Blocker Ware G-6-219925 | Enpower Resources Inc. only | Carthage, North (Cotton Valley) | Harrison | 1 | 3.99K | 394K | Dec 2005 – Apr 2026 |
| Mohon GU G-6-217948 | Soldier Creek Energy, LLC only | Blocker (Cotton Valley) | Harrison | 1 | 3.97K | 488K | Sep 2005 – Apr 2026 |
| Resch Gas Unit "B" G-6-82052 | BP America Production Company only | Blocker (Cotton Valley) | Harrison | 1 | 3.94K | 343K | Jan 1993 – Apr 2009 |
| Finklea Gas Unit G-6-217415 | TGNR East Texas II LLC only | Blocker (Cotton Valley) | Harrison | 1 | 3.94K | 1.01M | Dec 2005 – Jun 2019 |
| Mobley Gas Unit G-6-243391 | Valence Operating Company only | Blocker (Cotton Valley) | Harrison | 1 | 3.93K | 914K | Oct 2008 – Apr 2026 |
| Block 31 Unit G-10-279572 | Hilcorp Energy Company only | Block 31 (Devonian) | Crane | 1 | 3.88K | 2.01M | Aug 2015 – Apr 2026 |
| Hannah Estate O-10-377 | Abarta Oil & Gas Co., Inc. only | Block a-34, Northwest (Glorieta) | Andrews | 2 | 3.87K | 32 | Jan 1993 – Oct 1996 |
| Mobley Gas Unit G-6-177237 | Valence Operating Company only | Blocker (Cotton Valley) | Harrison | 1 | 3.86K | 653K | Feb 2000 – Nov 2009 |
| University Block 31 -A- O-10-21362 | Plains Petroleum Operating Co. only | Block 31, NW. (Penn Upper) | Crane | 1 | 3.86K | 6.09K | Jan 1993 – Feb 1998 |
| Bath Gas Unit A G-6-227898 | Mmgl East Texas III, LLC only | Blocker (Cotton Valley) | Harrison | 1 | 3.85K | 839K | Mar 2007 – Nov 2021 |
| Brewster, Nancy Gas Unit G-6-142333 | BP America Production Company only | Blocker (Cotton Valley) | Harrison | 1 | 3.85K | 1M | Jan 1993 – Aug 2011 |
| Smith, F. G. -A- G-10-48317 | Crescent Energy Operating, LLC only | Miller Block B-29 (Penn.) | Ward | 1 | 3.84K | 1.15M | Jan 1993 – Apr 2026 |
| Laird, Roy H. /Block 122/ O-7-6509 | Martin, Billy Ray only | East Texas | Gregg | 2 | 3.81K | 13 | Jan 1993 – Sep 1999 |
| East Side Block Unit G-4-174048 | Wallis Energy, Inc. only | Agua Dulce (Consolidated Frio) | Nueces | 1 | 3.8K | 489K | Jul 1999 – Apr 2026 |
| East Side Block Unit G-4-82840 | Royal Production Company, Inc. only | Agua Dulce (Vicksburg Consl.) | Nueces | 1 | 3.8K | 163K | Jan 1995 – Jun 1997 |
| Parish 48 Gas Unit G-10-181748 | XTO Energy Inc. only | Block 16 (Montoya) | Ward | 1 | 3.8K | 167K | Dec 2000 – Nov 2001 |
| Cooper "43" G-10-187293 | XTO Energy Inc. only | Block 16 (Devonian) | Ward | 1 | 3.78K | 3.3M | Aug 2001 – Aug 2023 |
| Blalock "A" G-6-207070 | Sabine Energy Inc. only | Blocker (Cotton Valley) | Harrison | 1 | 3.77K | 409K | Nov 2004 – Jun 2017 |
| Harris-Munden GU G-6-211745 | Craton Operating LLC only | Blocker (Cotton Valley) | Harrison | 1 | 3.76K | 441K | Mar 2005 – Dec 2016 |
| University -M- O-10-31357 | WPX Energy Permian, LLC only | Block 16 (Permo Penn) | Ward | 1 | 3.74K | 19 | Jan 1993 – Oct 2015 |
| Blocker, W. O., Etal O-13-10915 | Itx Pipeline Company, LLC only | Morris (Strawn) | Wise | 1 | 3.73K | 90 | Jan 1993 – Apr 2026 |
| Block 37-Unit #1 O-1-3116 | W.W. Energy only | Salt Flat | Caldwell | 1 | 3.73K | 1.23K | Jan 1993 – Nov 2025 |
| State Lease 59455 G-3-138259 | Jefferson Block 24 Oil & Gas LLC only | High Is. Blk. 24L (FB-C, GK) | High IS-LB | 1 | 3.72K | 3.9M | Jan 1993 – May 1998 |
| State Lease 59455 G-3-47122 | Jefferson Block 24 Oil & Gas LLC only | High Is. Blk. 24L (FB-C, HC) | High IS-LB | 1 | 3.72K | 3.08M | Jan 1993 – Jun 2016 |
| Mosley, Thelma Gas Unit G-6-180101 | Valence Operating Company only | Blocker (Cotton Valley) | Harrison | 1 | 3.72K | 882K | Aug 2000 – May 2011 |
| University 20-1 O-10-36779 | Brown, H.L. Operating, L.L.C. only | Block 20 (Bone Spring) | Winkler | 1 | 3.72K | 2.51K | Oct 2001 – Feb 2003 |
| Block 31 Unit G-10-279798 | Hilcorp Energy Company only | Block 31 (Devonian) | Crane | 1 | 3.72K | 2.58M | Aug 2015 – Apr 2026 |
| Block 55-L SW/4 G-3-204070 | Seiran E & P Company, LLC only | High Island BLK.55-L (Disc. B) | High IS-LB | 1 | 3.71K | 782K | Jul 2004 – Jun 2008 |
| Mathews, Fannie O-10-25179 | Bald Eagle Operating Inc. only | Block a-34 (Yates) | Andrews | 1 | 3.69K | 5.64K | Jan 1994 – Dec 2025 |
| State Tract 368-L G-3-192482 | El Paso Production Oil & Gas Co. only | Block 368-L (Miocene C) | Brazos-LB | 1 | 3.68K | 985K | Feb 2002 – Jan 2003 |
| Edwards Block 3 O-10-61456 | Utoco, Ltd. only | Spraberry (Trend Area) | Gaines | 1 | 3.68K | 0 | Mar 2024 – Apr 2026 |
| Thompson, J. Philip Gas Unit G-6-140850 | Mmgl East Texas III, LLC only | Blocker (Cotton Valley) | Harrison | 1 | 3.67K | 1.11M | Jan 1993 – Sep 2021 |
| Mustang Island Block 883-S G-4-262506 | Fieldwood Energy LLC only | Mstg Isl BLK 883 (Cib Haz 3) | Mustang IS-SB | 1 | 3.67K | 550K | Apr 2011 – Mar 2014 |
| Pyote Gas Unit No. 3 G-10-44182 | XTO Energy Inc. only | Block 16 (Devonian) | Ward | 1 | 3.66K | 5.31M | Jan 1993 – Apr 2026 |
| University "15-11" O-10-36426 | Minihan Oil & Gas Corporation only | Block 11 (Wichita, LO) | Andrews | 1 | 3.64K | 2 | Oct 2000 – Nov 2000 |
| Bath Gas Unit A G-6-228174 | BP America Production Company only | Blocker (Cotton Valley) | Harrison | 1 | 3.64K | 627K | Apr 2007 – Mar 2011 |
| Matthews, William Gas Unit G-6-202074 | BP America Production Company only | Blocker (Cotton Valley) | Harrison | 1 | 3.64K | 511K | Apr 2004 – Feb 2014 |
| Harris, James Gas Unit G-6-162332 | Valence Operating Company only | Blocker (Cotton Valley) | Harrison | 1 | 3.63K | 901K | Dec 1996 – Jan 2016 |
| E. Riethmeyer Gas Unit G-4-223249 | Block "T" Petroleum, Inc. only | Javelina (Vicksburg Cons.) | Hidalgo | 1 | 3.62K | 851K | Aug 2006 – Apr 2026 |
| Bath Gas Unit "B" G-6-142396 | Mmgl East Texas III, LLC only | Blocker (Cotton Valley) | Harrison | 1 | 3.61K | 1.03M | Jan 1993 – Sep 2015 |
| Bartlett-Bailey Gas Unit 1 G-6-265773 | Walkabout Operating, LLC only | Blocker (Cotton Valley) | Harrison | 1 | 3.61K | 783K | Jan 2012 – Apr 2026 |
| Roscoe, Rosa R. Gas Unit G-6-231986 | Mmgl East Texas III, LLC only | Blocker (Cotton Valley) | Harrison | 1 | 3.58K | 1M | Sep 2007 – Apr 2026 |
| Dudeck Heirs Gas Unit G-6-247941 | Mmgl East Texas III, LLC only | Blocker (Cotton Valley) | Harrison | 1 | 3.56K | 2.48M | Mar 2009 – Apr 2026 |