| Simon G-3-224242 | Petrodome Operating, LLC only | Lucky, South (9000) | Matagorda | 1 | 67.3K | 153K | Feb 2007 – Aug 2011 |
| Simons G-4-192519 | Dewbre Petroleum Corporation only | Midway, South (Consolidated) | San Patricio | 1 | 52.6K | 990K | Oct 2002 – Apr 2017 |
| Simon G-3-176895 | EOG Resources, Inc. only | Lucky, South (Frio TM-8) | Matagorda | 1 | 12.5K | 904K | Mar 2000 – Jul 2003 |
| 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 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 |
| 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 |
| 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 |
| Fitzsimons, H. A. G-1-64677 | Bluestar Energy, Inc. only | Louie Herring (Olmos) | Dimmit | 1 | 1.29K | 815K | Jan 1993 – Feb 2012 |
| 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 |
| Simon-Ottis G-3-147988 | Anadarko E&P Company LP only | Wadsworth, South (Tex-Miss) | Matagorda | 1 | 540 | 355K | May 1993 – Apr 1994 |
| Simons, M. G-13-150514 | Richey, Ray Management Co., Inc. only | Wise County Regular | Wise | 1 | 465 | 26.8K | Jul 1994 – Dec 2005 |
| San Pedro Ranch G-1-159568 | Prime Operating Company only | Hugh Fitzsimons (Olmos) | Dimmit | 1 | 396 | 13.9K | Jul 1996 – Jul 1997 |
| Simon-Ottis G-3-123118 | Union Pacific Resources Company only | Wadsworth, South (Doss) | Matagorda | 1 | 383 | 48K | Jan 1993 – Apr 1997 |
| Grossman, Simon G-2-71443 | Dirks Petroleum Company only | Gamble Gully (Queen City) | Live Oak | 1 | 353 | 55.7K | Jan 1993 – Jan 1995 |
| Simons, K. G-2-149348 | Carter Exploration Company only | Buckeye Knoll (Yegua 4760) | Live Oak | 1 | 288 | 12.7K | Mar 1994 – May 1994 |
| Simon "B" G-5-75846 | Hilcorp Energy Company only | Personville, N (CV Consolidated) | Limestone | 1 | 274 | 229K | Jan 1993 – Feb 1998 |
| San Pedro Ranch G-1-139425 | Prime Operating Company only | Hugh Fitzsimons (Olmos) | Dimmit | 1 | 259 | 1.93K | Jan 1993 – Apr 1993 |
| Simon Gas Unit G-3-219135 | Samson Lone Star, LLC only | Wadsworth, South (Tex-Miss) | Matagorda | 1 | 135 | 109K | Jun 2006 – Dec 2007 |
| Fitzsimons, Hugh A. et al -Z- G-1-106951 | Prime Operating Company only | Hugh Fitzsimons (Olmos) | Dimmit | 1 | 109 | 19.6K | Jan 1993 – Jul 1996 |
| Fitzsimons "A" G-1-169582 | Collins & Ware, Inc. only | Hugh Fitzsimons (Olmos) | Dimmit | 1 | 107 | 64.8K | Apr 1998 – Feb 1999 |
| San Pedro Ranch G-1-138919 | Prime Operating Company only | Hugh Fitzsimons (Olmos) | Dimmit | 1 | 47 | 11.2K | Jan 1993 – Oct 1993 |
| Simons Gas Unit B G-4-88564 | Global Natural Resources Corp. only | Midway, S. (Anderson) | San Patricio | 1 | 38 | 829 | Jan 1993 – Feb 1993 |
| Fitzsimons G-1-165203 | Bluestar Energy, Inc. only | Louie Herring (Olmos) | Dimmit | 1 | 11 | 355K | Oct 1997 – Feb 2012 |
| Fitzsimmons "A" G-1-172350 | Prime Operating Company only | Hugh Fitzsimons (Olmos) | Dimmit | 1 | 9 | 17.4K | Feb 1999 – Aug 2001 |
| San Pedro Ranch D/S G-1-135049 | Prime Operating Company only | Hugh Fitzsimons (Olmos) | Dimmit | 1 | 2 | 41.9K | Jan 1993 – Aug 1995 |
| Simons Gas Unit -A- G-4-63707 | Global Natural Resources Corp. only | Portland, N. (Commonwealth Serie | San Patricio | 1 | 0 | 0 | — |
| Simons G-4-192440 | EOG Resources, Inc. only | Midway, South (Frio Deep) | San Patricio | 1 | 0 | 0 | — |
| Simons G-4-197021 | EOG Resources, Inc. only | Wildcat | San Patricio | 1 | 0 | 0 | — |
| Sanders, Buela G-8-32490 | Dial-Simon only | Throckmorton County Regular(gas) | Throckmorton | 1 | 0 | 0 | — |
| Simon-Barker Unit G-8-134892 | North Ridge Corporation only | Ranger (Black Lime West) | Eastland | 1 | 0 | 724 | Jan 1993 – Sep 1994 |
| Westbrook G-10-20181 | Hillin-Simon Oil Company only | Kermit (Yates) | Winkler | 1 | 0 | 0 | — |
| Crum, M. E. G-10-126702 | Hillin-Simon Oil Company only | Keystone (Yates) | Winkler | 1 | 0 | 2.38K | Jan 1993 – Jan 1995 |
| Keystone "14" G-10-137637 | Hillin-Simon Oil Company only | Keystone, SW. (San Andres) | Winkler | 1 | 0 | 0 | — |
| Fitzsimon, Laurence J. G-14-22758 | RTC Resources, LLP only | Twin (Tonkawa) | Hansford | 1 | 0 | 69.2K | Jan 1993 – Aug 2015 |
| Simone G-14-27747 | Burk Royalty Co., Ltd. only | Texas Hugoton | Sherman | 1 | 0 | 617K | Jan 1993 – Apr 2026 |
| Fitzsimons G-1-313 | Prime Operating Company only | Hugh Fitzsimons (Olmos) | Dimmit | 1 | 0 | 0 | — |
| Simonson G-14-27748 | Burk Royalty Co., Ltd. only | Texas Hugoton | Hansford | 1 | 0 | 433K | Jan 1993 – Apr 2026 |
| Fitzsimons et Al G-1-316 | Prime Operating Company only | Hugh Fitzsimons (Olmos) | Dimmit | 1 | 0 | 0 | — |
| Fitzsimmons, Hugh G-1-65528 | Prime Operating Company only | Hugh Fitzsimons (Olmos) | Dimmit | 1 | 0 | 0 | — |
| Fitzsimons, Hugh A. et al -Z- G-1-93058 | Prime Operating Company only | San Pedro | Dimmit | 1 | 0 | 0 | — |
| San Pedro Ranch G-1-99202 | Prime Operating Company only | Hugh Fitzsimons (Olmos) | Dimmit | 1 | 0 | 862 | Jan 1993 – Nov 2000 |
| San Pedro Ranch G-1-101766 | Prime Operating Company only | Hugh Fitzsimons (Olmos) | Dimmit | 1 | 0 | 0 | — |
| San Pedro Ranch G-1-108832 | Prime Operating Company only | Hugh Fitzsimons (Olmos) | Dimmit | 1 | 0 | 0 | — |
| San Pedro Ranch G-1-128007 | Prime Operating Company only | Hugh Fitzsimons (Olmos) | Maverick | 1 | 0 | 0 | — |