| University 45 O-10-45869 | Apache Corporation only | Block 31 (Atoka 7900) | Crane | 1 | 484 | 96 | Nov 2014 – May 2015 |
| University 15 G-9-166351 | Rim Operating, Inc. only | Block 38 (Ellenburger) | Crockett | 1 | 481 | 22.5K | Nov 1997 – Jun 2003 |
| Shaw Gas Unit G-6-211924 | Thunderbird (Texas) Resources LP only | Blocker (Cotton Valley) | Harrison | 1 | 480 | 119K | May 2005 – Jul 2007 |
| East Block 31 Atoka Unit G-10-228821 | Formentera Operations LLC only | Block 31, East (Atoka) | Crane | 1 | 478 | 372K | May 2007 – Sep 2019 |
| University C G-9-154366 | Rim Operating, Inc. only | Block 38 (Canyon Sd.) | Crockett | 1 | 475 | 52.8K | May 1995 – Jun 2003 |
| State of Texas -V- G-10-65958 | Olsen Energy Inc. only | Block 12 (Yates) | Andrews | 1 | 472 | 8.87K | Nov 2001 – Jan 2026 |
| Cornett, E. V. "A" O-11-61937 | BC Operating, Inc. only | Block 35 (Dean Sd.) | Dawson | 1 | 471 | 235 | Jan 1993 – Apr 1996 |
| Block 31 Unit G-10-165878 | Hilcorp Energy Company only | Block 31 (Queen) | Crane | 1 | 466 | 199K | Oct 1997 – Apr 2026 |
| University 12-25 SE O-10-43515 | Sheridan Production Company, LLC only | Block 12 | Andrews | 1 | 458 | 1.4K | May 2012 – Nov 2012 |
| Moore "B" G-4-225806 | Block "T" Petroleum, Inc. only | Las Hermanitas (House Sand) | Duval | 1 | 450 | 896K | Mar 2007 – Apr 2026 |
| Dorsett, W.N. Gas Unit G-6-191807 | Mmgl East Texas III, LLC only | Blocker (Page) | Harrison | 1 | 449 | 83.5K | Oct 2002 – Oct 2003 |
| Deutsch G-6-194431 | RFE Operating, LLC only | Blocker (Travis Peak) | Harrison | 1 | 448 | 167K | Apr 2003 – Jun 2025 |
| Beaty G-10-134815 | JJH Energy Company only | Miller Block B-29 (Penn.) | Ward | 1 | 436 | 270K | Jan 1993 – Feb 2026 |
| Kellison Unit G-10-59041 | Endeavor Energy Resources L.P. only | Block 16 (Devonian) | Ward | 1 | 426 | 1.05M | Jan 1993 – Aug 1999 |
| Blocker Ranch-State A G-4-92658 | Vaquero Operating only | Gold River, North (Olmos) | Webb | 1 | 414 | 237K | Jan 1993 – Sep 2022 |
| Wood Unit G-10-199633 | Q Natural Resources, LLC only | Block 16 (Montoya) | Ward | 1 | 413 | 133K | Apr 2003 – Sep 2023 |
| Allen, Lenora Gas Unit G-6-193862 | Spindletop Oil & Gas Company only | Blocker (Page) | Harrison | 1 | 413 | 115K | Feb 2003 – Apr 2026 |
| McQuatters O-10-29618 | OXY USA Inc. only | Block a-34 (Yates) | Andrews | 1 | 412 | 85 | Jan 1993 – Jun 2010 |
| Roman O-10-49254 | Ring Energy, Inc. only | Block a-34 (San Andres) | Andrews | 1 | 411 | 0 | Aug 2017 – Jan 2018 |
| Wernecke, E. D. -A G-4-171982 | Block "T" Petroleum, Inc. only | Rosita, NW (Wilcox Cons.) | Duval | 1 | 410 | 980K | Apr 1998 – Apr 2026 |
| Kellison Unit G-10-197146 | Endeavor Energy Resources L.P. only | Block 16 (Montoya) | Ward | 1 | 405 | 121K | Jul 2002 – May 2017 |
| State of Texas Block 582-S G-3-174432 | Vamos Oil & Gas, LLC only | Matagorda Island BLK.582-S (M-5) | Matgrda IS-SB | 1 | 405 | 664K | Oct 1998 – Nov 1999 |
| E.D. Wernecke G.U. G-4-171990 | Block "T" Petroleum, Inc. only | Rosita, NW (Wilcox Cons.) | Duval | 1 | 395 | 6.24M | Mar 1998 – Apr 2026 |
| Blocker G-13-174154 | Western Chief Operating, L.L.C. only | McCutchin (Ellenburger) | Wise | 1 | 391 | 247K | Aug 1999 – May 2024 |
| Weatherby - Weatherby Gas Unit G-4-138674 | Block "T" Petroleum, Inc. only | Rosita, NW (Wilcox Cons.) | Duval | 1 | 383 | 4.64M | Jan 1993 – Apr 2026 |
| Lucy Adams O-10-50465 | Two P Partners, LLC only | Estes Block-34 (Holt) | Ward | 1 | 374 | 6.55K | Jun 2018 – Jan 2019 |
| State Tract 368-L G-3-194095 | El Paso Production Oil & Gas Co. only | Block 368-L (6000 Sand) | Brazos-LB | 1 | 366 | 258K | Feb 2003 – Jun 2003 |
| Moore Gas Unit B G-4-217401 | Block "T" Petroleum, Inc. only | Las Hermanitas (House Sand) | Duval | 1 | 360 | 1.92M | Feb 2006 – Apr 2026 |
| Block 31 Unit G-10-279502 | OXY USA Inc. only | Block 31 (Devonian) | Crane | 1 | 359 | 16.5K | Oct 2015 – Jun 2018 |
| Shovlin Vehle/Moore "A" G-4-245805 | Block "T" Petroleum, Inc. only | Las Hermanitas (House Sand) | Duval | 1 | 356 | 1.23M | Aug 2008 – Apr 2026 |
| Runnels, Mack V. Gas Unit G-6-187263 | Valence Operating Company only | Blocker (Cotton Valley) | Harrison | 1 | 354 | 1.11M | Jan 2002 – Apr 2026 |
| Cowden -F- O-10-28123 | Andector Exploration Company only | Block 11 (Wichita) | Andrews | 1 | 353 | 4.79K | Jan 1993 – Nov 1993 |
| Block #3 O-1-3090 | W.W. Energy only | Salt Flat | Caldwell | 1 | 347 | 32 | Jan 1993 – May 1996 |
| Blocker, Vef Unit 2 G-6-221574 | Faulconer Energy, LLC only | Blocker (Page) | Harrison | 1 | 342 | 113K | May 2006 – Mar 2023 |
| State of Texas Block 582-S G-3-174224 | Vamos Oil & Gas, LLC only | Matagorda Island BLK.582-S(m-6) | Matgrda IS-SB | 1 | 340 | 1.64M | Oct 1998 – Aug 2000 |
| F.W. Blocker Estate G-6-29496 | GMX Resources Inc. only | Bethany (Travis Peak) | Harrison | 1 | 335 | 54.5K | Jan 1993 – Aug 2007 |
| Block 31 Unit G-10-295285 | Hilcorp Energy Company only | Block 31 (Devonian) | Crane | 1 | 327 | 116K | May 2023 – Apr 2026 |
| Block 59 State 35 1 G-10-223577 | Permian Resources Operating, LLC only | Toyah, NW (Shale) | Reeves | 1 | 317 | 854K | Apr 2006 – Sep 2020 |
| Harris, James Gas Unit G-6-197157 | Valence Operating Company only | Blocker (Cotton Valley) | Harrison | 1 | 312 | 1.13M | Jul 2003 – Apr 2026 |
| Reeves -43- O-10-25973 | Reeves County SWD, LLC only | Reeves-Block 4 (del. 4430) | Reeves | 1 | 302 | 16 | Feb 1993 – Aug 1995 |
| Rutland G-6-286072 | Diversified Production LLC only | Blocker (Page) | Harrison | 1 | 301 | 101K | Jan 2019 – Aug 2024 |
| Kilgore-Wernecke Gas Unit G-4-161390 | Block "T" Petroleum, Inc. only | Rosita, NW (Wilcox Cons.) | Duval | 1 | 300 | 4.03M | Dec 1996 – Apr 2026 |
| Barron O-11-63188 | Hallwood Energy Corporation only | Block 35 (Dean Sd.) | Dawson | 1 | 299 | 4 | Jan 1993 – Apr 1993 |
| Fisher -2- O-10-26611 | Miocene Oil & Gas, Inc. only | Block a-34 (San Andres) | Andrews | 2 | 294 | 212 | Jan 1993 – May 1995 |
| Becker, Josie Taylor G-6-160162 | Brammer Engineering, Inc. only | Blocker (Page) | Harrison | 1 | 287 | 8.24K | Apr 1996 – Jul 1997 |
| Hill Unit G-10-195322 | XTO Energy Inc. only | Block 16 (Montoya) | Ward | 1 | 284 | 556K | Dec 2002 – Feb 2004 |
| Long, Ell O-10-35343 | Eagle Rock Operating Company,llc only | Block 27 (Tubb) | Crane | 1 | 275 | 95.3K | Jan 1997 – Jul 1997 |
| Harris, James Gas Unit G-6-188198 | Valence Operating Company only | Blocker (Cotton Valley) | Harrison | 1 | 275 | 1.3M | May 2002 – Apr 2026 |
| University -36B- G-10-292372 | Slant Operating, LLC only | Block 31 (Atoka 7900) | Crane | 1 | 266 | 46.1K | Oct 2021 – Jan 2023 |
| Cox, R.A. O-10-35825 | Seay Exploration, Inc. only | Block a-28 (Wichita-Albany) | Andrews | 1 | 257 | 0 | Aug 1998 – Nov 1998 |