| Scull 5J O-9-7932 | Hoover Petroleum Company, LLC only | Simpson | Crockett | 2 | 13K | 85 | Jan 1993 – Apr 2026 |
| SB & TG "18" O-9-10139 | Hoover Petroleum Company, LLC only | Simpson | Crockett | 1 | 12.6K | 7.36K | Apr 1993 – Feb 2023 |
| Simpson G-2-133215 | Shidler, Mark L., Inc. only | Speaks, S.W. (12010) | Lavaca | 1 | 12.5K | 780K | Jan 1993 – Jan 2007 |
| Daniel, M. K. -A- O-1-14357 | Tema Oil and Gas Company only | Simpson-Mann (Canyon) | Val Verde | 1 | 12.4K | 38.9K | Jul 2001 – Feb 2017 |
| Stephens "A" O-8-21462 | Simpson Operating Services, LP only | Brown County Regular | Brown | 17 | 12.4K | 30 | Jan 1993 – Mar 2026 |
| Simpson O-13-33813 | Oakridge Oil and Gas, LP only | Ken-Rich (Conglomerate 5100) | Jack | 1 | 12.3K | 133K | May 2018 – Aug 2022 |
| Gary-Waller Unit O-9-16324 | Simpson Operating Services, LP only | Ballinger, West (Jennings) | Runnels | 1 | 12.2K | 80.1K | Aug 2007 – Mar 2026 |
| Big State 10A O-9-7883 | Hoover Petroleum Company, LLC only | Simpson | Crockett | 2 | 11.9K | 85 | Jan 1993 – Apr 2026 |
| Cederholm O-9-17141 | Simpson Operating Services, LP only | Ballinger, West (Morris SD) | Runnels | 1 | 11.8K | 43.1K | Mar 2010 – Mar 2026 |
| Hoover, -B- O-9-1288 | Hoover Petroleum Company, LLC only | Simpson | Crockett | 2 | 11K | 14 | Jan 1993 – Apr 2026 |
| Hoover O-14-5915 | Plains Exploration & Prod. Co. only | Alpar-Falcon (Simpson) | Ochiltree | 2 | 10.7K | 268K | Jan 1993 – Nov 2006 |
| Simpson O-13-18932 | Spiller Oil & Gas Company only | Lucky Ridge, SW. (2100) | Jack | 2 | 10.6K | 428 | Jan 1993 – Jun 2006 |
| Halley, S. M. G-10-183097 | Permex Petroleum Corporation only | Emperor (Simpson) | Winkler | 1 | 10.4K | 945K | Dec 2000 – Nov 2025 |
| Big State Ranch "2B" O-9-12655 | Hoover Petroleum Company, LLC only | Simpson | Crockett | 1 | 10.4K | 2.67K | Jan 1993 – Aug 2022 |
| Maxwell "18" G-10-195445 | Permex Petroleum Corporation only | Emperor (Simpson) | Winkler | 1 | 10.3K | 1.59M | Oct 2002 – Dec 2025 |
| Bright #2 O-9-10614 | Bright Oil Company only | Simpson | Crockett | 1 | 9.59K | 2.02K | Jan 1993 – Sep 2012 |
| Big State 10B O-9-8019 | Hoover Petroleum Company, LLC only | Simpson | Crockett | 2 | 9.52K | 85 | Jan 1993 – Apr 2026 |
| Simpson O-8-23587 | TKP Petroleum, Inc. only | Old Glory, NE. (Bend Congl.) | Stonewall | 3 | 9.35K | 10.3K | Jan 1993 – May 2002 |
| SB & TG "24-25" O-9-10138 | Hoover Petroleum Company, LLC only | Simpson | Crockett | 2 | 9.11K | 36 | Apr 1993 – Apr 2026 |
| Cone, Rachel O-13-28947 | E-Z Disposal Service, Inc. only | Cone (Simpson Dolomite) | Montague | 2 | 8.89K | 49.7K | Mar 1995 – May 2010 |
| Scull 5K O-9-8017 | Hoover Petroleum Company, LLC only | Simpson | Crockett | 2 | 8.83K | 84 | Jan 1993 – Apr 2026 |
| Lewis-Simpson Ranch Oil Unit NO2 O-5-3391 | Kilmarnock Oil Company, Inc. only | Bazette | Navarro | 2 | 8.56K | 1.86K | Jan 1993 – May 1997 |
| Simpson, J.R. Unit O-3-14417 | Sage Energy Company only | Giddings (Austin Chalk-3) | Burleson | 1 | 8.29K | 53.8K | Jan 1993 – Jan 1996 |
| Blaze O-9-9054 | Brody Oil & Gas Services, Inc. only | Simpson | Crockett | 1 | 8.21K | 82 | Jan 1993 – Apr 2026 |
| Scull 5D O-9-7931 | Hoover Petroleum Company, LLC only | Simpson | Crockett | 1 | 8.18K | 84 | Jan 1993 – Apr 2026 |
| SB & TG #15-#22 O-9-12221 | Hoover Petroleum Company, LLC only | Simpson | Crockett | 2 | 8.1K | 314 | Apr 1993 – Apr 2026 |
| Halley, S. G-10-172725 | Permex Petroleum Corporation only | Emperor (Simpson) | Winkler | 1 | 8.1K | 2.13M | Mar 1999 – Nov 2025 |
| Trull, R. B. et Al G-3-170085 | Deep Rock Resources, Inc. only | Ashby (Simpson) | Matagorda | 1 | 8.01K | 110K | Jul 1998 – Jul 2002 |
| Halley, S. M. G-10-186673 | Permex Petroleum Corporation only | Emperor (Simpson) | Winkler | 1 | 7.99K | 2.1M | Feb 2001 – Nov 2025 |
| Hoover -F- O-9-1291 | Hoover Petroleum Company, LLC only | Simpson | Crockett | 2 | 7.82K | 24 | Jan 1993 – Apr 2026 |
| Simpson O-10-25318 | Bald Eagle Operating Inc. only | Block a-34 (Yates) | Gaines | 2 | 7.73K | 9.56K | Jan 1993 – Dec 2025 |
| Bright #3 O-9-11409 | Bright Oil Company only | Simpson | Crockett | 1 | 7.71K | 2.17K | Jan 1993 – Sep 2012 |
| Gary O-9-16118 | Simpson Operating Services, LP only | Ballinger, West (Capps) | Runnels | 1 | 7.65K | 19.5K | Nov 2006 – Apr 2021 |
| Simpson, H. D. O-8-3078 | Benson & Schoen Oil Co., Inc. only | White Flat | Nolan | 2 | 7.55K | 12.4K | Jan 1993 – Nov 2003 |
| Hoover G O-9-10440 | Hoover Petroleum Company, LLC only | Simpson | Crockett | 1 | 7.53K | 23 | Jan 1993 – Apr 2026 |
| Isaacs-Simpson G-14-88188 | Mountainside Energy Operating, L only | Canadian, SE (Douglas) | Hemphill | 1 | 7.32K | 193K | Jan 1993 – Aug 2008 |
| Koonsman, J.B. 678 O-11-67146 | Paladin Exploration Co., Inc. only | Gordon Simpson (Ellenburger) | Garza | 1 | 7.27K | 13 | Sep 1993 – Sep 1994 |
| Simpson -D- O-10-35369 | Unitex Oil & Gas, L.L.C. only | Coleman Ranch, N. (Clear Fork) | Mitchell | 4 | 7.25K | 0 | Jun 1997 – Aug 2016 |
| Hoover -D- O-9-1289 | Hoover Petroleum Company, LLC only | Simpson | Crockett | 2 | 7.15K | 1.99K | Jan 1993 – Apr 2026 |
| Scull 5F O-9-7929 | Hoover Petroleum Company, LLC only | Simpson | Crockett | 1 | 7.14K | 85 | Jan 1993 – Apr 2026 |
| Gill G-14-185511 | Huber, J. M., Corporation only | Miami Bluffs (Simpson) | Roberts | 1 | 6.98K | 140K | Jul 2001 – Oct 2002 |
| University 11 Sec 1 O-10-39306 | OXY USA EOR, LLC only | Martin (Second Simpson Sd.) | Andrews | 1 | 6.95K | 31.4K | May 2007 – May 2016 |
| Big State 2D O-9-9449 | Hoover Petroleum Company, LLC only | Simpson | Crockett | 1 | 6.84K | 86 | Jan 1993 – Apr 2026 |
| Big State 2M O-9-8865 | Hoover Petroleum Company, LLC only | Simpson | Crockett | 1 | 6.82K | 85 | Jan 1993 – Apr 2026 |
| Isaacs-Simpson G-14-58785 | Mountainside Energy Operating, L only | Canadian, SE (Douglas) | Hemphill | 1 | 6.52K | 2.33M | Jan 1993 – Mar 2026 |
| Simpson O-6-15566 | Machin & Associates, Inc. only | Iron Lake | Cass | 1 | 6.43K | 0 | Oct 2017 – Jan 2026 |
| Simpson, L.M.T. (Tract) O-13-28108 | BKM Production only | Sherman (Pennsylvanian 8100) | Grayson | 1 | 6.35K | 226K | Jan 1993 – Apr 2026 |
| Halley, S. G-10-166715 | Permex Petroleum Corporation only | Emperor (Simpson) | Winkler | 1 | 6.26K | 1.97M | Sep 1997 – Oct 2023 |
| Simpson, W. M. G-13-260968 | BKV Barnett, LLC only | Newark, East (Barnett Shale) | Wise | 1 | 6.11K | 990K | Jan 2011 – Mar 2024 |
| Simpson-Mann "A" O-9-12127 | Core Petro, LLC only | Atkinson, W. (San Angelo) | Tom Green | 6 | 6.03K | 32 | Jan 1993 – Apr 2026 |