| Gutierrez No. 1 O-4-13246 | Mortimer Production Company | Pedernal (Queen City) | Starr | 3 | 244K | 281K | Jul 2004 – Apr 2026 |
| Lago O-4-13722 | Mortimer Production Company | Pedernal (Queen City) | Starr | 2 | 199K | 671K | Apr 2011 – Apr 2026 |
| La Liebre O-4-13349 | Mortimer Production Company | Pedernal (Queen City) | Starr | 1 | 198K | 195K | Dec 2005 – Jul 2023 |
| Ignacia Gutierrez O-4-13732 | Mortimer Production Company | Pedernal (Queen City) | Starr | 2 | 152K | 155K | Oct 2011 – Apr 2026 |
| Plains Capital O-4-14162 | Mortimer Production Company | Pedernal (Queen City) | Starr | 2 | 120K | 51.5K | Nov 2021 – Apr 2026 |
| Garza Heirs O-4-13297 | Mortimer Production Company | Pedernal (Queen City) | Starr | 1 | 99.7K | 111K | Mar 2005 – Mar 2023 |
| Block/Guerra G-4-125090 | Mortimer Production Company | Arroyo Los Olmos (Guerra Sand) | Starr | 1 | 89.1K | 2.71M | Jan 1993 – Apr 2026 |
| Sue Fuller O-4-13911 | Mortimer Production Company | Pedernal (Queen City) | Starr | 1 | 88.1K | 43.1K | Mar 2014 – Sep 2019 |
| Gutierrez No. 3 O-4-14165 | Mortimer Production Company | Pedernal (Queen City) | Starr | 2 | 77.8K | 16.4K | Jan 2022 – Apr 2026 |
| Jostes O-4-10852 | Mortimer Production Company | Het (3114 Sand) | San Patricio | 2 | 63.2K | 59 | Jan 1993 – Aug 2002 |
| Walker, Billy L. G-4-153063 | Mortimer Production Company | Arroyo Los Olmos (Yegua 25) | Starr | 1 | 41K | 3.76M | Jan 1995 – Apr 2026 |
| Breaker O-4-11322 | Mortimer Production Company | Arroyo Los Olmos (Vicksburg) | Starr | 1 | 35.2K | 35 | Jan 1993 – Jul 2016 |
| Coates/Wright Unit G-4-257197 | Mortimer Production Company | Gregg Wood, S. (3950 W.) | Starr | 1 | 28.9K | 311K | Aug 2010 – May 2025 |
| Block-Guerra G-4-124670 | Mortimer Production Company | Arroyo Los Olmos (Yegua 25) | Starr | 1 | 26.4K | 3.3M | Jan 1993 – Apr 2026 |
| Ricaby G-4-172075 | Mortimer Production Company | Arroyo Los Olmos (Yegua 25) | Starr | 1 | 24.6K | 1.07M | May 1998 – Apr 2026 |
| Margo/Pena G-4-121118 | Mortimer Production Company | Arroyo Los Olmos (Yegua 25) | Starr | 1 | 22.6K | 2.83M | Jan 1993 – Apr 2026 |
| Ringgold Farms 1 G-4-123139 | Mortimer Production Company | Arroyo Los Olmos (Yegua 25) | Starr | 1 | 22.3K | 1.68M | Jan 1993 – Apr 2026 |
| El Paton G-4-246922 | Mortimer Production Company | T Patch (Reklaw Oso) | Zapata | 1 | 22.3K | 1.11M | Jun 2008 – Apr 2026 |
| Walker, Billy L. G-4-185319 | Mortimer Production Company | Arroyo Los Olmos (Yegua 25) | Starr | 1 | 20.3K | 2.1M | Sep 2001 – Apr 2026 |
| Parks/Hickman O-4-12017 | Mortimer Production Company | Arroyo Los Olmos (Yegua 25) | Starr | 1 | 20.2K | 109K | Jan 1993 – Apr 2026 |
| Guerra, R. R. O-4-13374 | Mortimer Production Company | Pedernal (Queen City) | Starr | 1 | 19.2K | 0 | May 2006 – Jun 2016 |
| Hiles/Garza O-4-13424 | Mortimer Production Company | Gregg Wood, S. (5350) | Starr | 1 | 19.1K | 93.5K | Mar 2007 – Apr 2026 |
| Walker, Billy L G-4-274294 | Mortimer Production Company | Arroyo Los Olmos (Yegua 25) | Starr | 1 | 19.1K | 880K | Apr 2014 – Apr 2026 |
| Margo/Pena G-4-179853 | Mortimer Production Company | Arroyo Los Olmos (Guerra Sand) | Starr | 1 | 18.8K | 1.1M | Oct 2000 – Apr 2026 |
| Guiterrez, J.M. Estate G-4-106783 | Mortimer Production Company | Roadrunner (Basal Queen City) | Jim Hogg | 1 | 17K | 1.38M | Jan 1993 – Apr 2019 |
| Wood/Wardner G-4-211972 | Mortimer Production Company | Gregg Wood, W. (5530) | Starr | 1 | 15.1K | 1.53M | May 2005 – Apr 2026 |
| Rodriguez-State G-4-245245 | Mortimer Production Company | T Patch (Reklaw Oso) | Zapata | 1 | 12.8K | 333K | Oct 2008 – Oct 2017 |
| Fowler, Bill Dodd O-4-1222 | Mortimer Production Company | Het (3114 Sand) | San Patricio | 1 | 12.2K | 36 | Jan 1993 – Feb 2002 |
| El Paton G-4-242315 | Mortimer Production Company | T Patch (Reklaw Oso) | Zapata | 1 | 11.4K | 718K | Sep 2008 – Apr 2026 |
| Guerra G-4-215507 | Mortimer Production Company | Arroyo Los Olmos (Yegua 25) | Starr | 1 | 10.7K | 1.22M | Nov 2005 – Apr 2026 |
| George, Cornelia O-4-10491 | Mortimer Production Company | Het (Het Sand 2ND) | San Patricio | 1 | 10.6K | 1.57K | Jan 1993 – Sep 2002 |
| Schenkel/Turney O-1-3407 | Mortimer Production Company | Turney | Edwards | 9 | 10.4K | 0 | Nov 2009 – Apr 2026 |
| Guerra G-4-151443 | Mortimer Production Company | Arroyo Los Olmos (Yegua 25) | Starr | 1 | 9.97K | 1.28M | Oct 1994 – Apr 2026 |
| Gutierrez, J. M. Estate G-4-256831 | Mortimer Production Company | Roadrunner (Basal Queen City) | Jim Hogg | 1 | 8.1K | 776K | Jun 2010 – Jul 2015 |
| Margo/Pena G-4-200161 | Mortimer Production Company | Arroyo Los Olmos (Middle Yegua) | Starr | 1 | 7.4K | 233K | Feb 2004 – Nov 2012 |
| Starr Produce Company G-4-222925 | Mortimer Production Company | Garcias Ridge (Queen City) | Starr | 1 | 7.32K | 296K | Oct 2006 – Aug 2017 |
| Bowers Trust G-4-251146 | Mortimer Production Company | T Patch (Reklaw Oso) | Zapata | 1 | 7.23K | 682K | Jul 2009 – Apr 2026 |
| Bowers Trust G-4-252976 | Mortimer Production Company | T Patch (Reklaw Oso) | Zapata | 1 | 7.04K | 1.06M | Oct 2009 – Apr 2026 |
| Wood/Wardner G-4-189026 | Mortimer Production Company | Gregg Wood, W. (5530) | Starr | 1 | 6.33K | 336K | Jan 2002 – Jun 2009 |
| Guerra Mineral Trust G-4-217404 | Mortimer Production Company | T Patch (Reklaw Oso) | Starr | 1 | 6.11K | 276K | Mar 2006 – Jul 2017 |
| Wood-Wardner G-4-279548 | Mortimer Production Company | Gregg Wood, W. (5530) | Starr | 1 | 6.08K | 712K | Apr 2014 – Apr 2026 |
| Donnell Minerals G-4-229978 | Mortimer Production Company | T Patch (Reklaw Oso) | Zapata | 1 | 5.97K | 255K | Aug 2007 – Apr 2026 |
| Gutierrez G-4-233584 | Mortimer Production Company | T Patch (Reklaw Oso) | Starr | 1 | 5.94K | 1.38M | Aug 2007 – Jun 2016 |
| Lopez, J. G. G-4-270772 | Mortimer Production Company | Roadrunner (Basal Queen City) | Jim Hogg | 1 | 5.48K | 650K | Jun 2013 – Oct 2025 |
| Guerra Mineral Trust G-4-218315 | Mortimer Production Company | T Patch (Reklaw Oso) | Starr | 1 | 5.24K | 703K | Mar 2006 – Apr 2021 |
| George G-4-197958 | Mortimer Production Company | Het (2700) | San Patricio | 1 | 4.97K | 38.3K | Oct 2003 – May 2004 |
| George O-4-13608 | Mortimer Production Company | Mathis, N. (4000) | San Patricio | 1 | 4.23K | 10.5K | Mar 2010 – Oct 2011 |
| Wood/Guerra G-4-129867 | Mortimer Production Company | Arroyo Los Olmos (Yegua 25) | Starr | 1 | 4.18K | 1.01M | Jan 1993 – Apr 2026 |
| Margo/Pena O-4-13780 | Mortimer Production Company | Arroyo Los Olmos (Middle Yegua) | Starr | 1 | 3.89K | 12.6K | Dec 2012 – Dec 2025 |
| Margo/Pena G-4-133683 | Mortimer Production Company | Arroyo Los Olmos (Middle Yegua) | Starr | 1 | 3.77K | 61K | Jan 1993 – Dec 1998 |