| Gutierrez No. 1 O-4-13246 | Mortimer Production Company | Pedernal (Queen City) | Starr | 3 | 246K | 282K | Jul 2004 – Aug 2026 |
| Lago O-4-13722 | Mortimer Production Company | Pedernal (Queen City) | Starr | 2 | 200K | 677K | Apr 2011 – Aug 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 | 156K | 156K | Oct 2011 – Aug 2026 |
| Plains Capital O-4-14162 | Mortimer Production Company | Pedernal (Queen City) | Starr | 2 | 128K | 53.2K | Nov 2021 – Aug 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 | 2.72M | by Jan 1993 – Aug 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 | 80.8K | 18.1K | Jan 2022 – Aug 2026 |
| Walker, Billy L. G-4-153063 | Mortimer Production Company | Arroyo Los Olmos (Yegua 25) | Starr | 1 | 41K | 3.77M | Jan 1995 – Aug 2026 |
| Breaker O-4-11322 | Mortimer Production Company | Arroyo Los Olmos (Vicksburg) | Starr | 1 | 35.2K | 35 | by 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 | 26.3K | 3.31M | by Jan 1993 – Aug 2026 |
| Ricaby G-4-172075 | Mortimer Production Company | Arroyo Los Olmos (Yegua 25) | Starr | 1 | 24.4K | 1.07M | May 1998 – Aug 2026 |
| Margo/Pena G-4-121118 | Mortimer Production Company | Arroyo Los Olmos (Yegua 25) | Starr | 1 | 22.6K | 2.84M | by Jan 1993 – Aug 2026 |
| Ringgold Farms 1 G-4-123139 | Mortimer Production Company | Arroyo Los Olmos (Yegua 25) | Starr | 1 | 22.2K | 1.68M | by Jan 1993 – Aug 2026 |
| Walker, Billy L. G-4-185319 | Mortimer Production Company | Arroyo Los Olmos (Yegua 25) | Starr | 1 | 20.3K | 2.11M | Sep 2001 – Aug 2026 |
| Parks/Hickman O-4-12017 | Mortimer Production Company | Arroyo Los Olmos (Yegua 25) | Starr | 1 | 20.2K | 109K | by Jan 1993 – May 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 | 19.2K | 93.7K | Mar 2007 – Aug 2026 |
| Walker, Billy L G-4-274294 | Mortimer Production Company | Arroyo Los Olmos (Yegua 25) | Starr | 1 | 19.2K | 888K | Apr 2014 – Aug 2026 |
| Margo/Pena G-4-179853 | Mortimer Production Company | Arroyo Los Olmos (Guerra Sand) | Starr | 1 | 18.9K | 1.1M | Oct 2000 – Aug 2026 |
| Wood/Wardner G-4-211972 | Mortimer Production Company | Gregg Wood, W. (5530) | Starr | 1 | 15.2K | 1.54M | May 2005 – Aug 2026 |
| Guerra G-4-215507 | Mortimer Production Company | Arroyo Los Olmos (Yegua 25) | Starr | 1 | 10.7K | 1.23M | Nov 2005 – Aug 2026 |
| Guerra G-4-151443 | Mortimer Production Company | Arroyo Los Olmos (Yegua 25) | Starr | 1 | 9.95K | 1.28M | Oct 1994 – Aug 2026 |
| 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 |
| 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 | 6.1K | 717K | Apr 2014 – Aug 2026 |
| Gutierrez G-4-233584 | Mortimer Production Company | T Patch (Reklaw Oso) | Starr | 1 | 5.94K | 1.38M | Aug 2007 – Jun 2016 |
| Guerra Mineral Trust G-4-218315 | Mortimer Production Company | T Patch (Reklaw Oso) | Starr | 1 | 5.24K | 703K | Mar 2006 – Apr 2021 |
| Wood/Guerra G-4-129867 | Mortimer Production Company | Arroyo Los Olmos (Yegua 25) | Starr | 1 | 4.18K | 1.01M | by Jan 1993 – Aug 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 | by Jan 1993 – Dec 1998 |
| Sue Fuller O-4-13942 | Mortimer Production Company | Pedernal (Crockett) | Starr | 1 | 3.03K | 166K | Jul 2012 – Aug 2026 |
| Hiles/Garza #1 G-4-216708 | Mortimer Production Company | Arroyo Los Olmos (Yegua 25) | Starr | 1 | 2.84K | 42.3K | Mar 2006 – Feb 2007 |
| Walker, Billy L. G-4-150189 | Mortimer Production Company | Arroyo Los Olmos (Yegua 25) | Starr | 1 | 2.37K | 268K | Jun 1994 – Jun 2013 |
| Garza G-4-247278 | Mortimer Production Company | Roma, East (5650) | Starr | 1 | 2.36K | 428K | Jun 2008 – Aug 2026 |
| Gutierrez G-4-234479 | Mortimer Production Company | T Patch (Reklaw Oso) | Starr | 1 | 2.2K | 408K | Jan 2008 – Aug 2026 |
| Guerra, R.R. G-4-219301 | Mortimer Production Company | Pedernal (Queen City) | Starr | 1 | 1.37K | 625K | Jul 2006 – Aug 2026 |
| Wood Unit G-4-279335 | Mortimer Production Company | Gregg Wood, W. (5530) | Starr | 1 | 1.23K | 155K | Jun 2015 – Aug 2026 |
| Guerra G-4-225218 | Mortimer Production Company | Arroyo Los Olmos (Yegua 25) | Starr | 1 | 936 | 102K | Feb 2007 – Aug 2015 |
| Gutierrez G-4-235477 | Mortimer Production Company | T Patch (Reklaw Oso) | Starr | 1 | 515 | 215K | Mar 2008 – Sep 2025 |
| Mauricio Gonzalez Unit G-4-233582 | Mortimer Production Company | T Patch (Reklaw Oso) | Starr | 1 | 372 | 421K | Aug 2007 – Aug 2026 |
| Guerra G-4-125748 | Mortimer Production Company | Arroyo Los Olmos (Yegua 25) | Starr | 1 | 327 | 862K | by Jan 1993 – Aug 2026 |
| Garza Heirs Unit 2 G-4-275498 | Mortimer Production Company | T Patch (Reklaw Oso) | Starr | 1 | 284 | 223K | Mar 2012 – Aug 2026 |
| Salinas, et Al G-4-168189 | Mortimer Production Company | Arroyo Los Olmos (Yegua 25) | Starr | 1 | 76 | 5.36K | Mar 1998 – Oct 2004 |
| Ringgold Farms G-4-124576 | Mortimer Production Company | Arroyo Los Olmos (Yegua 25) | Starr | 1 | 8 | 216K | by Jan 1993 – Aug 2015 |
| Groos National Bank G-4-138077 | Mortimer Production Company | Gregg Wood (1000) | Starr | 1 | 1 | 200K | by Jan 1993 – Sep 2000 |