| Normanna Townsite O-2-8128 | Cimarron Engineering, LLC | Normanna (Hockley 3525) | Bee | 1 | 258K | 3.95K | Nov 1995 – Apr 2026 |
| State Lease 21 G-3-289174 | Cimarron Engineering, LLC | Pegasus Gulf Coast (Big Gas Sd.) | Brazoria | 1 | 172K | 2.35M | Feb 2020 – Sep 2024 |
| Blackstone 156 G-3-289172 | Cimarron Engineering, LLC | Rattlesnake Mound (6400) | Brazoria | 1 | 127K | 270K | Mar 2020 – Apr 2026 |
| Gloria Lopez G-4-280268 | Cimarron Engineering, LLC | Lopez Ranch (Consolidated) | Brooks | 1 | 101K | 1.19M | Mar 2016 – Jan 2026 |
| Bazan G-4-184870 | Cimarron Engineering, LLC | Bazan (Yegua 6100) | Duval | 1 | 98.8K | 2.16M | Aug 2001 – Nov 2014 |
| Granberry O-2-9109 | Cimarron Engineering, LLC | Paisano Creek (2ND Yegua) | Live Oak | 1 | 91.7K | 109K | Jul 2006 – Apr 2026 |
| Gloria Lopez G-4-282310 | Cimarron Engineering, LLC | Lopez Ranch (Consolidated) | Brooks | 1 | 84.7K | 1.19M | Apr 2017 – Mar 2026 |
| H. Blackstone G-3-296708 | Cimarron Engineering, LLC | Pegasus Gulf Coast (Grubbs) | Brazoria | 1 | 72K | 1.24M | Jan 2024 – Apr 2026 |
| Hendricks O-4-14229 | Cimarron Engineering, LLC | Alice, SE. (Scheel) | Jim Wells | 1 | 45.1K | 0 | Jul 2023 – Apr 2026 |
| Lehman, W.F.L. G-4-95717 | Cimarron Engineering, LLC | Mobil-David (Anderson, Seg. -R-) | Nueces | 1 | 43.7K | 2.39M | Jan 1993 – May 2009 |
| Messer, W.H. Jr. et Al O-2-6453 | Cimarron Engineering, LLC | Bonnie View, South (5300) | Refugio | 1 | 41.3K | 20 | Jan 1993 – Feb 2016 |
| Twin Peaks G-3-294982 | Cimarron Engineering, LLC | Pegasus Gulf Coast (Big Gas Sd.) | Brazoria | 1 | 40.8K | 640K | Aug 2022 – Jun 2025 |
| Westhoff & McCrory O-2-11044 | Cimarron Engineering, LLC | Mauritz, West (5400) | Jackson | 1 | 35.9K | 0 | Mar 2015 – Apr 2026 |
| McCaslin, Charles L. O-2-4047 | Cimarron Engineering, LLC | Ramirena, SW. (Yegua 3) | Live Oak | 3 | 35.4K | 46.8K | Jan 1993 – Oct 2014 |
| Lehman O-4-13319 | Cimarron Engineering, LLC | London, West (Frio-Horne) | Nueces | 1 | 33.2K | 0 | Aug 2005 – Aug 2015 |
| McCaslin, Charles L. O-2-5661 | Cimarron Engineering, LLC | Ramirena SW (Yeg 3, UP, Seg E) | Live Oak | 1 | 32K | 79.9K | Jan 1993 – Oct 2014 |
| Hartman O-2-10352 | Cimarron Engineering, LLC | Arneckeville (Yegua 4910) | De Witt | 1 | 30K | 0 | Sep 2012 – Apr 2026 |
| Hendricks A O-4-14244 | Cimarron Engineering, LLC | Alice, SE. (Scheel) | Jim Wells | 1 | 23.9K | 0 | Jun 2024 – Apr 2026 |
| Davidson, Mary O-2-8836 | Cimarron Engineering, LLC | Ramirena, SW. (Yegua #2 Sd.) | Live Oak | 1 | 23.6K | 48.3K | Oct 2003 – Aug 2021 |
| McCaslin, Charles L. O-2-8263 | Cimarron Engineering, LLC | Ramirena, S.W. (5500 Sec B) | Live Oak | 1 | 21.9K | 32.8K | Feb 1997 – Feb 2024 |
| Panzer 43 G-3-295596 | Cimarron Engineering, LLC | Sour Lake (Yegua 10,000) | Hardin | 1 | 21.4K | 697K | Apr 2023 – Apr 2026 |
| Reynolds, Mary A. O-2-2015 | Cimarron Engineering, LLC | Ramirena, SW. (Sec. B, a Sand) | Live Oak | 2 | 21.3K | 9.17K | Jan 1996 – Sep 2014 |
| LJ O-2-11842 | Cimarron Engineering, LLC | Jackson Ranch (Yegua 5400) | Live Oak | 1 | 19.6K | 0 | Oct 2019 – Apr 2026 |
| McCaslin, Charles O-2-7181 | Cimarron Engineering, LLC | Ramirena, SW. (Yegua 3, Upper) | Live Oak | 1 | 19.2K | 75.9K | Jan 1993 – May 2018 |
| Gasper Rice - Waters G-4-277042 | Cimarron Engineering, LLC | Shield (Frio D) | Nueces | 1 | 16.3K | 463K | Mar 2014 – May 2020 |
| Vanover O-4-14191 | Cimarron Engineering, LLC | Al Smith (Vicksburg) | Jim Wells | 1 | 13.2K | 1.58K | Jan 2023 – Apr 2026 |
| Elliott Farms O-14-9142 | Cimarron Engineering, LLC | Farnsworth-Conner (Kansas City) | Ochiltree | 1 | 13.1K | 13.3K | Aug 2014 – Apr 2026 |
| Lehman O-4-13524 | Cimarron Engineering, LLC | London Gin (Mass. Catahoula) | Nueces | 1 | 12.6K | 0 | Dec 2008 – Jul 2015 |
| Atkinson O-1-14634 | Cimarron Engineering, LLC | Loma Alta | McMullen | 1 | 12.4K | 0 | Sep 2005 – Jul 2015 |
| Reynolds, Mary A. G-2-159823 | Cimarron Engineering, LLC | Ramirena, Sw.(sec. B, Jackson 3) | Live Oak | 1 | 11.3K | 512K | Jul 1996 – Dec 2017 |
| Parsell Ranch O-14-9204 | Cimarron Engineering, LLC | St. Clair (Granite Wash) | Roberts | 1 | 10.8K | 2.56K | Aug 2014 – Apr 2026 |
| Curtiss O-2-12158 | Cimarron Engineering, LLC | Ramirena (5000) | Live Oak | 1 | 8.99K | 0 | Mar 2021 – Jun 2023 |
| Bitterly O-2-10771 | Cimarron Engineering, LLC | Arneckeville (Yegua 4870,E) | De Witt | 1 | 8.64K | 0 | Feb 2014 – Mar 2019 |
| Rosita Creek G-4-298115 | Cimarron Engineering, LLC | Captain Lucey (5860) | Jim Wells | 1 | 8.35K | 197K | May 2024 – Apr 2026 |
| Reynolds, Mary A. O-2-7614 | Cimarron Engineering, LLC | Ramirena, SW. (D-58) | Live Oak | 1 | 8K | 5K | Dec 1995 – Oct 2014 |
| Parham O-4-13470 | Cimarron Engineering, LLC | King Ranch, W. (Miocene 6000) | Willacy | 1 | 6.96K | 0 | Dec 2007 – Feb 2014 |
| McNeil O-2-8641 | Cimarron Engineering, LLC | Jackson Ranch (Yegua 5400) | Live Oak | 1 | 5.97K | 99.9K | Mar 2001 – Jan 2019 |
| HLR O-3-27730 | Cimarron Engineering, LLC | Hartburg | Newton | 1 | 5.4K | 1 | Feb 2020 – Dec 2022 |
| Thamm Trust O-2-10890 | Cimarron Engineering, LLC | Arneckeville (Yegua 4910) | De Witt | 1 | 4.86K | 0 | Apr 2014 – Mar 2019 |
| Hobbs, B. J. G-2-250628 | Cimarron Engineering, LLC | Provident City (Yegua) | Lavaca | 1 | 4.45K | 322K | Apr 2009 – Apr 2023 |
| McCaslin, Charles L. G-2-158260 | Cimarron Engineering, LLC | Ramirena, SW (Jackson Stray) | Live Oak | 1 | 4.33K | 788K | Dec 1995 – Jul 2021 |
| Mary Alice Jones G-2-256072 | Cimarron Engineering, LLC | Murry's Magic (Yegua) | Live Oak | 1 | 4.16K | 604K | Dec 2009 – Oct 2025 |
| Rosa Saenz G-4-275944 | Cimarron Engineering, LLC | Alice, N. (Stillwell Sand) | Jim Wells | 1 | 3.78K | 533K | Mar 2015 – Jan 2021 |
| Acl O-4-14011 | Cimarron Engineering, LLC | Alice, North (5150) | Jim Wells | 1 | 3.52K | 24.3K | Jan 2017 – Mar 2020 |
| Cottingham G-4-288661 | Cimarron Engineering, LLC | Agua Dulce (Consolidated Frio) | Nueces | 1 | 3.04K | 228K | Nov 2019 – Aug 2021 |
| Mosser O-4-14195 | Cimarron Engineering, LLC | Reynolds (Pundt) | Jim Wells | 1 | 2.33K | 0 | Feb 2023 – May 2024 |
| Reynolds, Mary A. G-2-181724 | Cimarron Engineering, LLC | Ramerina, SW. (D-80) | Live Oak | 1 | 2.25K | 70.2K | Oct 2000 – Dec 2017 |
| Emerald G-3-295301 | Cimarron Engineering, LLC | Hartburg | Orange | 1 | 1.97K | 120K | Mar 2022 – Apr 2023 |
| H. Blackstone O-3-28084 | Cimarron Engineering, LLC | Chocolate Bayou ( Alibel) | Brazoria | 1 | 1.9K | 41.7K | Apr 2023 – Dec 2023 |
| Bazan O-4-13936 | Cimarron Engineering, LLC | Orcones (Frio-Vksbg Cons.) | Duval | 1 | 1.78K | 0 | Dec 2014 – Feb 2019 |