| State Tract 563 O-2-7970 | Tri-Union Development Corp. only | Matagorda Block 563-L (6517) | Matgrda IS-LB | 1 | 47.7K | 45.3K | May 1994 – Sep 1999 |
| Estes, E. W. O-10-55576 | Two P Partners, LLC only | Estes Block 34 (Penn.) | Ward | 8 | 47.6K | 105K | Jan 2021 – Apr 2026 |
| Watson, L. A. G-10-178573 | XTO Energy Inc. only | Block 16 (Montoya) | Ward | 1 | 47.4K | 10.6M | Jan 2000 – Apr 2026 |
| Martin, W. H. O-10-24091 | N & B Oil and Gas LLC only | Estes Block 34 (Penn.) | Ward | 2 | 47.2K | 785K | Jan 1993 – Apr 2026 |
| University 31-4 O-10-38878 | Baker Operating, Inc. only | Block 31 (Penn. 7620) | Crane | 1 | 47.1K | 0 | May 2008 – Apr 2026 |
| University "14-A" O-10-38057 | Energen Resources Corporation only | Block 11 (Fusselman) | Andrews | 3 | 47.1K | 371K | Feb 2007 – Aug 2010 |
| Crews-Mast, Ltd. O-10-45295 | Vin Fisher Operating, Inc. only | Block a-34 (San Andres) | Andrews | 2 | 47K | 30.4K | Sep 2014 – Apr 2026 |
| High Island 24L SL 59455 G-3-250676 | Jefferson Block 24 Oil & Gas LLC only | High Is. Blk. 24L (FB-DD, HF) | High IS-LB | 1 | 46.8K | 812K | May 2009 – Mar 2013 |
| Estes, E. W. O-10-50656 | Two P Partners, LLC only | Estes Block 34 (Wich.-Alb., L.) | Ward | 2 | 46K | 94.1K | Jul 2018 – Apr 2026 |
| Black Baldy O-10-61635 | Vin Fisher Operating, Inc. only | Block a-34 (San Andres) | Andrews | 13 | 45.3K | 0 | Oct 2024 – Apr 2026 |
| University Devonian 48 O-10-44959 | Formentera Operations LLC only | Block 31 (Penn. 7620) | Crane | 1 | 45.2K | 131K | Jun 2013 – Apr 2026 |
| Cupid O-10-50041 | Ring Energy, Inc. only | Block a-34 (San Andres) | Gaines | 1 | 45.2K | 27.8K | Oct 2017 – Apr 2026 |
| Thea O-10-50865 | Ring Energy, Inc. only | Block a-34 (San Andres) | Andrews | 1 | 45K | 46.8K | Feb 2018 – Dec 2025 |
| Blocker "A" O-10-27183 | Cutbow Operating, LLC only | Spraberry (Trend Area) | Martin | 1 | 44.9K | 40.4K | Jan 1993 – Apr 2026 |
| Parkey Block 44 O-13-27514 | Memorial Production Oper. LLC only | H. F. F. (Caddo) | Archer | 5 | 44.9K | 21 | Jan 1993 – Mar 2008 |
| Jones Ranch 10 O-11-68667 | Formation Resour Field Svcs, LLC only | Block a-7 (Devonian) | Gaines | 1 | 44.8K | 3.57K | Jan 2004 – Aug 2008 |
| State of Texas -AV- O-10-384 | Ovintiv USA Inc. only | Block 6 (Devonian) | Andrews | 2 | 44.8K | 16.7K | Jan 1993 – Dec 1995 |
| University "JA" O-10-33113 | Morningstar Operating LLC only | University Block 9 (Wolfcamp) | Andrews | 2 | 44.4K | 82.4K | Jan 1993 – Apr 2026 |
| Deford White Oil Unit 2 O-10-45893 | Citation Oil & Gas Corp. only | Block a-34 (San Andres) | Andrews | 3 | 44K | 7.32K | Oct 2014 – Mar 2022 |
| Cothes "A" O-10-34814 | Abarta Oil & Gas Co., Inc. only | Block a-34, Northwest (Glorieta) | Andrews | 1 | 43.9K | 53 | Aug 1995 – Dec 1999 |
| Block, B. F. O-14-33 | Red Line Company, Ltd. only | Panhandle Carson County Field | Carson | 11 | 43.1K | 330K | Jan 1993 – Apr 2026 |
| Raider Power State O-10-45780 | Vin Fisher Operating, Inc. only | Block a-34 (San Andres) | Andrews | 2 | 43K | 22.8K | Dec 2014 – Apr 2026 |
| Richter "D" O-10-23835 | Walsh & Watts, Inc. only | Estes Block 34 (Penn.) | Ward | 1 | 42.8K | 226K | Jan 1993 – Apr 2026 |
| Waddell, W. N. Etal O-10-380 | Burlington Res O & G Co-Midland only | Block B-21 (Ellenburger) | Crane | 2 | 42.7K | 78.9K | Jan 1993 – Mar 2006 |
| Bosh OU O-6-13999 | Enpower Resources Inc. only | Blocker (Richardson Sand) | Harrison | 1 | 42.7K | 172K | Jan 2000 – Jun 2018 |
| Parramore, J. H. "B" O-11-12977 | J & M SWD, LLC only | Block F (Tannehill) | King | 5 | 42.6K | 113 | Jan 1993 – Aug 2025 |
| High Island 24L SL59456 O-3-23759 | Jefferson Block 24 Oil & Gas LLC only | High Is. Blk. 24L (FB-E, HC) | High IS-LB | 1 | 42.1K | 141K | Nov 1999 – Jun 2016 |
| State Tract 98-L O-3-23973 | Whiting Petroleum Corporation only | Block 98-L (Amph B) | High IS-LB | 1 | 41.9K | 117K | Feb 2001 – Aug 2001 |
| Ross O-10-43891 | Walsh & Watts, Inc. only | Block 12 | Andrews | 1 | 41.9K | 97K | Mar 2013 – Apr 2026 |
| State-Fikes O-10-35311 | Block "T" Petroleum, Inc. only | Emma (Glorieta) | Andrews | 1 | 41.8K | 0 | Apr 1997 – Mar 2018 |
| Cowden, Emma O-10-1294 | Block "T" Petroleum, Inc. only | Emma (Ellenburger) | Andrews | 5 | 41.6K | 14.5K | Jan 1993 – Jan 2006 |
| University -7- O-9-8115 | Wynco Energy, Inc. only | Block 47 (Shallow) | Crockett | 4 | 41.5K | 28.4K | Jan 1993 – Apr 2026 |
| State Lucky Strike O-10-45163 | Vin Fisher Operating, Inc. only | Block a-34 (San Andres) | Andrews | 3 | 41.5K | 34.1K | Jun 2014 – Mar 2026 |
| Sultenfuss, H. A. O-4-11603 | Tidewater Minerals Corporation only | Estes Cove (E-1, Fault Block B) | Aransas | 1 | 41.3K | 97 | Jan 1993 – Aug 2013 |
| Crews-Mast 8A O-10-27631 | Vin Fisher Operating, Inc. only | Block a-34 (San Andres) | Andrews | 4 | 41K | 6.42K | Jan 1993 – Nov 2024 |
| University Atp O-10-34020 | Minihan Oil & Gas Corporation only | Block 11 (Ellenburger) | Andrews | 1 | 40.5K | 12.6K | Nov 1993 – Nov 1999 |
| B&W "A" O-10-41595 | Flat Top Operating, LLC only | Block 12 (Devonian) | Andrews | 1 | 40.3K | 68.9K | Mar 2011 – Mar 2026 |
| Moirae O-10-50848 | Ring Energy, Inc. only | Block a-34 (San Andres) | Gaines | 1 | 40K | 6.46K | Mar 2018 – Nov 2020 |
| University -L- O-10-13655 | Mammoth Exploration LLC only | University Block 9 (Wolfcamp) | Andrews | 1 | 39.8K | 58.7K | Jan 1993 – May 2018 |
| University of Texas -234 O-9-9422 | Warren American Oil Company only | Block 46, East (Grayburg) | Crockett | 5 | 39.7K | 29.5K | Jan 1993 – Sep 1998 |
| University -H- O-10-14931 | Scout Energy Management LLC only | Block 31 (Devonian) | Crane | 3 | 39.5K | 410K | Jan 1993 – Apr 2026 |
| High Island 24L SL 59455 O-3-26154 | Jefferson Block 24 Oil & Gas LLC only | High Is. Blk. 24L (FB-DD, HF) | High IS-LB | 1 | 38.5K | 69.5K | Oct 2013 – Jun 2016 |
| University Block 48 O-9-20647 | Permian Resources Operating, LLC only | Spraberry (Trend Area) | Reagan | 4 | 38.5K | 866K | Mar 2020 – Apr 2026 |
| Campbell Estate et Al G-10-178793 | XTO Energy Inc. only | Block 16 (Montoya) | Ward | 1 | 38.3K | 9.68M | May 2000 – Apr 2026 |
| Dobbins, W. T. G-10-55906 | XTO Energy Inc. only | Block 16 (Devonian) | Ward | 1 | 38.2K | 11.6M | Jan 1993 – Apr 2026 |
| Choate Block 1 Lot 4A O-3-18688 | Arrowhead Operating Inc. only | Batson New | Hardin | 1 | 38K | 1.64K | Jan 1993 – Apr 2026 |
| Texu"r" O-10-23153 | WTG Exploration only | Block 12 | Andrews | 1 | 37.1K | 377K | Jan 1993 – Apr 2026 |
| State of Texas -DL- O-10-14549 | Jetta Operating Company, Inc. only | Block 17, Southeast (Delaware) | Ward | 2 | 37K | 285K | Jan 1993 – Dec 2021 |
| Waddell TR 4 O-10-58398 | Blackbeard Operating, LLC only | Block 31, NW. (Penn Upper) | Crane | 2 | 36.8K | 33.3K | Aug 2022 – Apr 2026 |
| University 9 -AB- O-10-18904 | Olsen Energy Inc. only | Block 9 (Devonian) | Andrews | 3 | 36.8K | 319K | Apr 2011 – Apr 2026 |