| Maxwell 13 O-10-37310 | Chevron U. S. A. Inc. only | Emperor (Simpson) | Winkler | 1 | 38.9K | 758K | May 2003 – May 2017 |
| Brandenburg G-10-108598 | WTG Exploration only | Brandenburg Payton (Simpson) | Ward | 1 | 38.8K | 3.59M | Jan 1993 – Apr 2026 |
| Simpson Canyon 1046 State O-9-15878 | Surge Solutions, Inc. only | Bluegrass (Wolfcamp) | Crockett | 1 | 38.1K | 0 | Sep 2005 – Feb 2026 |
| Simpson, O. L. O-10-25746 | Unitex Oil & Gas, L.L.C. only | Coleman Ranch, N. (Clear Fork) | Mitchell | 8 | 37.6K | 19 | Jan 1993 – Jan 2020 |
| Maxwell "18" G-10-174840 | Permex Petroleum Corporation only | Emperor (Simpson) | Winkler | 1 | 36.8K | 1.47M | Jun 1999 – Nov 2025 |
| Simpson, L. M. T. O-13-12113 | BKM Production only | Sherman (Davis 8400) | Grayson | 2 | 36.2K | 226K | Jan 1993 – Apr 2026 |
| Simpson Unit G-13-279116 | EOG Resources, Inc. only | Newark, East (Barnett Shale) | Montague | 1 | 35.7K | 413K | Jan 2014 – Apr 2026 |
| Simpson "A" O-11-67712 | Canan Mowrey Operating, LLC only | Dry Duck (Tannehill) | Dickens | 3 | 35.1K | 21.8K | Apr 1997 – Oct 2025 |
| Hoover -128- O-14-6218 | Unbridled Resources, LLC only | Alpar-Falcon (Simpson) | Ochiltree | 1 | 35K | 417K | Jan 1993 – Dec 2009 |
| Simpson O-10-37840 | Midland Oil and Gas, Inc. only | Luther, E. (Canyon Reef) | Howard | 1 | 33.8K | 49.1K | Sep 2006 – Jun 2010 |
| Brooks O-13-31901 | Atoka Operating, Inc. only | Big Mineral Creek (Simpson) | Grayson | 1 | 32.1K | 77.8K | Jan 2011 – Jul 2019 |
| Simpson Unit O-13-33514 | EOG Resources, Inc. only | Newark, East (Barnett Shale) | Montague | 1 | 31.8K | 592K | Jan 2014 – Apr 2026 |
| Big State 7-10 O-9-10773 | Hoover Petroleum Company, LLC only | Simpson | Crockett | 2 | 31.1K | 48 | Jan 1993 – Apr 2026 |
| Gary O-9-16903 | Simpson Operating Services, LP only | Ballinger, West (Morris SD) | Runnels | 1 | 30.2K | 174K | May 2007 – Mar 2026 |
| Marshall O-13-26621 | BKM Production only | Sherman, SW. (Simpson) | Grayson | 1 | 29.9K | 169K | Jan 1993 – Dec 2022 |
| Simpson et Al O-3-15042 | Betro, Inc. only | Inez Jameson (Navarro) | Burleson | 1 | 28.6K | 20 | Jan 1993 – Apr 2026 |
| Ford, Fred O-13-18156 | Great American Resources Inc. only | Dimock (Simpson) | Montague | 1 | 28K | 87.7K | Jan 1993 – Apr 2026 |
| Lewis-Simpson Ranch O-5-3146 | Kilmarnock Oil Company, Inc. only | Bazette | Navarro | 6 | 27.9K | 1.73K | Jan 1993 – Aug 2005 |
| Simpson, T. P. O-8-19192 | King Energy Resources only | Hawk Eye (Adams Branch) | Eastland | 10 | 27K | 21 | Jan 1993 – Apr 2026 |
| Hoover-Sun O-9-1287 | Hoover Petroleum Company, LLC only | Simpson | Crockett | 2 | 25.8K | 22 | Jan 1993 – Jan 2026 |
| Scull 5N O-9-11094 | Hoover Petroleum Company, LLC only | Simpson | Crockett | 1 | 24.7K | 86 | Jan 1993 – Apr 2026 |
| Univ. -11-Sec.-1- O-10-34319 | BP America Production Company only | Martin (Second Simpson Sd.) | Andrews | 1 | 24.1K | 32K | Feb 1998 – Jun 2002 |
| SB & TG #10-13 O-9-10017 | Hoover Petroleum Company, LLC only | Simpson | Crockett | 4 | 23.9K | 6K | Apr 1993 – Apr 2026 |
| Simpson O-8-31405 | RHB Exploration & Production,llc only | White Flat | Nolan | 1 | 23.7K | 0 | Nov 2013 – Apr 2026 |
| Big State Ranch -2- O-9-12276 | Hoover Petroleum Company, LLC only | Simpson | Crockett | 1 | 23.7K | 13.3K | Jan 1993 – Apr 2026 |
| Simpson Family G-6-179086 | Linder, John Operating Co., LLC only | Lassater (Travis Peak, Gas) | Marion | 1 | 23.1K | 1M | Jul 2000 – Apr 2026 |
| Cowden G-10-189128 | Camterra Resources, Inc. only | Emperor (Simpson) | Winkler | 1 | 23K | 1.34M | Apr 2002 – Apr 2026 |
| Phillips O-11-15414 | Patterson Petroleum, Inc. only | Gordon Simpson (Strawn) | Garza | 1 | 22.6K | 21.3K | Jan 1993 – Feb 1996 |
| Simpson Family G-6-166879 | Linder, John Operating Co., LLC only | Lassater (Travis Peak, Gas) | Marion | 1 | 22.4K | 951K | Aug 1997 – Apr 2026 |
| Simpson G-2-245470 | Faulconer Energy, LLC only | Christmas (12300) | De Witt | 1 | 21.9K | 2.79M | Jan 2009 – Apr 2026 |
| Big State 18-2 O-9-12315 | Hoover Petroleum Company, LLC only | Simpson | Crockett | 1 | 21.6K | 8.74K | Jan 1993 – Apr 2026 |
| Simpson Family G-6-157265 | Linder, John Operating Co., LLC only | Lassater (Travis Peak, Gas) | Marion | 1 | 21.5K | 1.1M | Oct 1995 – Apr 2026 |
| Maxwell "23" G-10-186443 | Permex Petroleum Corporation only | Emperor (Simpson) | Winkler | 1 | 21K | 1.97M | Oct 2001 – Nov 2019 |
| Big State -10- O-9-7809 | Hoover Petroleum Company, LLC only | Simpson | Crockett | 2 | 20K | 85 | Jan 1993 – Apr 2026 |
| Big State "2A" O-9-9225 | Hoover Petroleum Company, LLC only | Simpson | Crockett | 3 | 19.9K | 19.9K | Feb 1993 – Jan 2026 |
| Simpson "L" O-13-30454 | JDL Operating, LLC only | Lester (Conglomerate) | Jack | 1 | 17.4K | 10.2K | Aug 2005 – Apr 2026 |
| Simpson-Mann "B" O-9-12350 | Core Petro, LLC only | Atkinson, W. (San Angelo) | Tom Green | 6 | 17.2K | 38 | Jan 1993 – Apr 2026 |
| Edwards, Bryant O-13-1732 | Brisco, W. M. only | Henrietta, E. (Simpson Lime) | Clay | 3 | 16.6K | 750 | Jan 1993 – May 2003 |
| Simpson Family G-6-225612 | Linder, John Operating Co., LLC only | Lassater (Cotton Valley) | Marion | 1 | 16.3K | 425K | Jun 2006 – Apr 2026 |
| Big State 2 McMillan O-9-8309 | Hoover Petroleum Company, LLC only | Simpson | Crockett | 2 | 16.3K | 1.33K | Jan 1993 – Apr 2026 |
| Simpson Unit O-13-29428 | Perry Operating Inc. only | Senate (Miss.) | Jack | 1 | 16.1K | 38.7K | Dec 1997 – Apr 2026 |
| Scull -5-A- O-9-7863 | Hoover Petroleum Company, LLC only | Simpson | Crockett | 2 | 16K | 85 | Jan 1993 – Apr 2026 |
| Bright O-9-10201 | Bright Oil Company only | Simpson | Crockett | 1 | 15.9K | 26.3K | Jan 1993 – Nov 2014 |
| Halley, S. M. G-10-180876 | Permex Petroleum Corporation only | Emperor (Simpson) | Winkler | 1 | 14.8K | 2.3M | Oct 2000 – Sep 2023 |
| Scull -5-B- O-9-7864 | Hoover Petroleum Company, LLC only | Simpson | Crockett | 2 | 14.8K | 85 | Jan 1993 – Apr 2026 |
| Big State Ranch "2A" O-9-12296 | Hoover Petroleum Company, LLC only | Simpson | Crockett | 1 | 14.7K | 8.34K | Jan 1993 – Apr 2026 |
| Stephens, J.B. Dr. O-8-13571 | Simpson Operating Services, LP only | Brown County Regular | Brown | 12 | 14.6K | 2.02K | Jan 1993 – Mar 2026 |
| Big State Ranch 2 "EF" O-9-9435 | Hoover Petroleum Company, LLC only | Simpson | Crockett | 2 | 14.4K | 86 | Jan 1993 – Apr 2026 |
| Simpson O-13-3844 | Geer Production Company only | Plemons (Bryson, Upper) | Jack | 2 | 13.6K | 80 | Jan 1993 – Aug 1999 |
| Simpson O-10-37401 | Midland Oil and Gas, Inc. only | Luther, SE. (Silurian-Devonian) | Howard | 1 | 13.4K | 0 | Aug 2004 – Dec 2014 |