| Simon-Littman -7- O-10-32971 | Paraluxe Oil & Gas, LLC only | Smith (Clear Fork) | Andrews | 3 | 266K | 273K | Jan 1993 – Apr 2026 |
| Simons-Elrod 34J O-10-63770 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Martin | 1 | 238K | 239K | Aug 2025 – Apr 2026 |
| Simons-Elrod 34L O-10-64128 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Martin | 1 | 231K | 214K | Aug 2025 – Apr 2026 |
| Simons-Elrod 34M O-10-64129 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Martin | 1 | 192K | 170K | Aug 2025 – Apr 2026 |
| Simons-Elrod 34K O-10-64126 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Martin | 1 | 176K | 229K | Aug 2025 – Apr 2026 |
| Simons 34 O-10-43439 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Martin | 2 | 133K | 517K | Nov 2012 – Apr 2026 |
| Simons, T. K. O-2-6403 | Sequoia Fossil Fuels, Inc. only | Texana, N. (Frio 5880) | Jackson | 1 | 129K | 31.7K | Jan 1993 – May 2012 |
| Simon-Littman O-10-32322 | Paraluxe Oil & Gas, LLC only | Smith (Clear Fork) | Andrews | 4 | 114K | 137K | Jan 1993 – Apr 2026 |
| Hugh a Fitzsimons, et Al O-1-11382 | Prime Operating Company only | Hugh Fitzsimmons (San Miguel) | Dimmit | 16 | 113K | 1.71M | Jan 1993 – Jan 2023 |
| Simons-Elrod 34N O-10-63967 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Martin | 1 | 97.2K | 99K | Aug 2025 – Apr 2026 |
| Simons, E. J. O-13-12552 | Cruthird, Mark Oil only | Wichita County Regular | Wichita | 18 | 89.6K | 45 | Jan 1993 – Mar 2026 |
| San Pedro Ranch O-1-4761 | Prime Operating Company only | Hugh Fitzsimons (Olmos) | Dimmit | 18 | 84.3K | 358K | Jan 1993 – Apr 2018 |
| Simon G-3-224242 | Petrodome Operating, LLC only | Lucky, South (9000) | Matagorda | 1 | 67.3K | 153K | Feb 2007 – Aug 2011 |
| Simons-Elrod 34I O-10-63978 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Martin | 1 | 66.9K | 193K | Aug 2025 – Apr 2026 |
| Simons G-4-192519 | Dewbre Petroleum Corporation only | Midway, South (Consolidated) | San Patricio | 1 | 52.6K | 990K | Oct 2002 – Apr 2017 |
| Robbins, T. E. O-8-11860 | Ase Operations LLC only | Simons | Haskell | 2 | 45.6K | 141 | Jan 1993 – Jun 2020 |
| Simons, M. K. O-2-3924 | D-Mil Production, Inc. only | Texana (6400, E) | Jackson | 1 | 40.2K | 170 | Jan 1993 – Apr 2026 |
| Tankersley O-8-12661 | Gruy Petroleum Management Co. only | Simons | Haskell | 1 | 32K | 26 | Jan 1993 – Sep 2002 |
| Simons, E. J. -B- O-13-16465 | Cruthird, Mark Oil only | Wichita County Regular | Wichita | 5 | 29.6K | 41 | Mar 1993 – Feb 2026 |
| Simons O-10-32397 | JM Cox Resources, L.P. only | Spraberry (Trend Area) | Martin | 1 | 29.2K | 85.3K | Jan 1993 – Sep 2010 |
| Simons-Hafernick Unit O-2-10778 | Magnum Producing, LP only | Westhoff (Combined Associated) | Jackson | 1 | 23.4K | 97.9K | Feb 2014 – May 2017 |
| Fitzsimons, Hugh A. et Al O-1-13337 | Prime Operating Company only | Hugh Fitzsimons (Olmos) | Dimmit | 1 | 19K | 31.4K | Jan 1993 – Oct 1995 |
| Simon O-3-19391 | Enervest Operating, L.L.C. only | Giddings (Austin Chalk-3) | Fayette | 1 | 17.2K | 15 | Jan 1993 – May 1999 |
| Fitzsimmons "A" O-1-14178 | Prime Operating Company only | Hugh Fitzsimons (Olmos) | Dimmit | 2 | 13.3K | 153K | Mar 1998 – Jan 2022 |
| Simon G-3-176895 | EOG Resources, Inc. only | Lucky, South (Frio TM-8) | Matagorda | 1 | 12.5K | 904K | Mar 2000 – Jul 2003 |
| Simon O-3-24393 | EOG Resources, Inc. only | Lucky, South (9300-B) | Matagorda | 1 | 12.5K | 23.8K | Jul 2003 – Aug 2009 |
| Simons, T. K. O-2-4964 | Sequoia Fossil Fuels, Inc. only | Texana, N. (Frio 6140) | Jackson | 2 | 11.2K | 8.24K | Mar 1995 – Sep 1997 |
| San Pedro Ranch/DS O-1-12525 | Prime Operating Company only | Hugh Fitzsimons (Olmos) | Dimmit | 1 | 7.05K | 20.5K | Jan 1993 – Jun 1995 |
| Simon "B" G-5-102189 | Hilcorp Energy Company only | Personville, N (CV Consolidated) | Limestone | 1 | 3.77K | 3.12M | Jan 1993 – Apr 2026 |
| San Pedro Ranch-Conoco O-1-9262 | Prime Operating Company only | Hugh Fitzsimons (Olmos) | Dimmit | 6 | 3.59K | 9.92K | Jan 1993 – Jun 1995 |
| San Pedro Ranch G-1-109469 | Prime Operating Company only | Hugh Fitzsimons (Olmos) | Dimmit | 1 | 3.34K | 143K | Jan 1993 – Apr 2017 |
| Simon "B" G-5-168589 | Hilcorp Energy Company only | Personville, N (CV Consolidated) | Limestone | 1 | 3.18K | 1.67M | Apr 1998 – Apr 2026 |
| Schropshire O-10-21047 | Simon, W. D. Oil Co. only | Quito (Delaware Sand) | Ward | 1 | 3.15K | 40 | Apr 1994 – Oct 2000 |
| Simons, T. K. G-2-165416 | Sequoia Fossil Fuels, Inc. only | Texana, North (5550) | Jackson | 1 | 2.93K | 155K | Oct 1997 – Oct 2009 |
| Henderson, Simon W. Jr et Al G-6-115667 | Valence Operating Company only | Gates, East (Travis Peak) | Nacogdoches | 1 | 2.68K | 483K | Aug 2000 – Apr 2026 |
| Hugh A. Fitzsimons, et al -Z- O-1-11354 | Prime Operating Company only | Hugh Fitzsimmons (San Miguel) | Dimmit | 2 | 2.68K | 13.5K | Jan 1993 – Jul 2008 |
| Simon, M. W. O-13-22674 | Quatro Oil and Gas, Inc. only | K-M-A | Wichita | 1 | 2.55K | 20 | Jan 1993 – Apr 2026 |
| Fitzsimons "A" G-1-166532 | Prime Operating Company only | Hugh Fitzsimmons (San Miguel) | Dimmit | 1 | 2.16K | 320K | Nov 1997 – Jan 2023 |
| Welborn-Simon G-13-226335 | Eagleridge Operating, LLC only | Newark, East (Barnett Shale) | Hood | 1 | 2.14K | 1.05M | Jan 2007 – Apr 2026 |
| Welborn-Simon G-13-226345 | Eagleridge Operating, LLC only | Newark, East (Barnett Shale) | Hood | 1 | 2.12K | 1.25M | Jan 2007 – Apr 2026 |
| San Pedro Ranch G-1-108831 | Prime Operating Company only | Hugh Fitzsimons (Olmos) | Dimmit | 1 | 1.51K | 67.1K | Jan 1993 – Jul 1999 |
| Snodgrass O-10-33459 | Simon, W. D. Oil Co. only | Scott (Delaware) | Ward | 1 | 1.45K | 1.27K | Jan 1993 – Jan 1994 |
| Fitzsimons, H. A. G-1-64677 | Bluestar Energy, Inc. only | Louie Herring (Olmos) | Dimmit | 1 | 1.29K | 815K | Jan 1993 – Feb 2012 |
| Simon, Joel L. et Al O-10-22601 | Gruy Petroleum Management Co. only | Smith (Clear Fork) | Andrews | 1 | 1.27K | 4.3K | Jan 1993 – Jul 1996 |
| State "B" O-10-33288 | Simon, W. D. Oil Co. only | Scott (Delaware) | Ward | 1 | 1.02K | 803 | Jan 1993 – Nov 1993 |
| San Pedro Ranch G-1-127035 | Prime Operating Company only | Hugh Fitzsimons (Olmos) | Dimmit | 1 | 979 | 87K | Jan 1993 – Jun 1995 |
| Simons Gas Unit -A- G-4-68991 | Royal Production Company, Inc. only | Portland, N. (Commonwealth Serie | San Patricio | 1 | 768 | 30.7K | Jan 1993 – Jan 1994 |
| Burkhardt-Skiles Mac Simon et Al O-1-571 | San Cajo Oil Company only | Ezzell | Live Oak | 1 | 690 | 149 | Jan 1993 – May 2005 |
| Simons, K. O-2-7511 | Carter Exploration Company only | Buckeye Knoll (Yegua 4760) | Live Oak | 1 | 669 | 542 | Jan 1993 – Jan 1994 |
| Prewit, B.N. Tr. -B- O-10-28027 | Simon, W. D. Oil Co. only | Collie (Delaware) | Reeves | 1 | 667 | 23 | Jan 1993 – Dec 1993 |