| Texasgulf, Inc. Fee Unit O-3-23450 | Old Ocean North (10150) | Brazoria | 1 | 743K | 415K | Dec 1997 – Jul 2026 |
| Mayfair la Brisa O-4-14192 | Rincon (G-3, East) | Starr | 1 | 38.4K | 64.6K | Dec 2022 – Jul 2026 |
| J.F. Weed O-2-11131 | Francitas, South ( F-18) | Jackson | 1 | 7.52K | 14.3K | Aug 2012 – Jul 2026 |
| A.R.G.L. & I G-4-125253 | Mercedes ( 1-Q) | Hidalgo | 1 | 0 | 0 | Jan 1993 – Jul 2026 |
| A. R. G. L. & I. Co. G-4-12003 | Mercedes ( 1-E) | — | 1 | 0 | 714K | Jan 1993 – Jul 2026 |
| Frerichs, F. L. G-2-139303 | Sheriff, West (Frio 9000) | Calhoun | 1 | 0 | 1.11M | Jan 1993 – Jul 2026 |
| Weed A G-2-245483 | Francitas, South (10,100) | Jackson | 1 | 0 | 2.9M | Jan 2009 – Jul 2026 |
| Mueller, A. W. Heirs G-2-175302 | Green Lake, West (8850) | Calhoun | 1 | 0 | 1.59M | Jul 1999 – Jul 2026 |
| A.R.G.L. & I. G-4-125424 | Mercedes (1-G-1) | Hidalgo | 1 | 0 | 25.1K | Jan 1993 – Jul 2026 |
| Hobbs G-2-262027 | Gata (Wilcox 11,400 Lower Sd.) | Lavaca | 1 | 0 | 17.6K | Jul 2011 – May 2024 |
| LA Brisa O-4-12886 | Rincon (Vicksburg Upper 5480) | Starr | 1 | 180K | 1.24M | Feb 2000 – Apr 2024 |
| Mayfair la Brisa G-4-181250 | Rincon (Vicksburg Cons.) | Starr | 1 | 0 | 844K | Nov 2000 – Dec 2022 |
| Walters, Dorothy G-2-154952 | Vienna (Wilcox, Middle U) | Lavaca | 1 | 0 | 12.7K | Feb 1995 – Sep 2022 |
| Mueller, A.W. Heirs G-2-138708 | Green Lake, West (Sheriff #3) | Calhoun | 1 | 0 | 0 | Jan 1993 – Mar 2022 |
| Texasgulf, Inc. Fee Unit O-3-23007 | Old Ocean North (10600) | Brazoria | 2 | 14.8K | 6.5K | Feb 1996 – Feb 2022 |
| Weed, J. F. G-2-234410 | Francitas, South ( 9,850) | Jackson | 1 | 0 | 168K | Mar 2007 – Jan 2022 |
| Stork, Arthur O-3-13173 | Giddings (Austin Chalk-3) | Lee | 2 | 112K | 1.87M | Jan 1993 – Jul 2016 |
| Cameron 554 G-4-172453 | Rincon, N. (Vicksburg Cons.) | Starr | 1 | 0 | 110K | Nov 1998 – Nov 2015 |
| Coates State G-4-124464 | Rincon, North (F-2) | Starr | 1 | 0 | 430K | Jan 1993 – Oct 2014 |
| Gonzales O-4-12900 | LA Reforma (G-2) | Starr | 1 | 43.8K | 142K | Dec 1999 – Oct 2013 |
| Argl & I G-4-215844 | Mercedes (7100) | Hidalgo | 1 | 0 | 94.8K | Jan 2006 – Oct 2012 |
| Gonzales G-4-252968 | LA Reforma (5500 Stray) | Starr | 1 | 0 | 125K | Sep 2009 – Aug 2012 |
| Hobbs G-2-243783 | Giv'n Take (Wilcox 10500) | Lavaca | 1 | 0 | 805K | Sep 2008 – May 2012 |
| Slick, T.B. Estate G-4-116870 | Rincon (Vicksburg Cons.) | Starr | 1 | 0 | 0 | Jan 1993 – Nov 2011 |
| Everardo Garza Unit G-4-235231 | LA Reforma (5750) | Starr | 1 | 0 | 158K | Jan 2008 – Feb 2011 |
| LA Brisa 971 O-4-12026 | Rincon (Sub-L, Upper) | Starr | 1 | 59.6K | 104K | Jan 1993 – Jan 2010 |
| Perez O-4-13174 | Gyp Hill (Finley Sand) | Brooks | 1 | 1.51K | 898 | Apr 2003 – Aug 2009 |
| Martinez, F. F. O-4-11572 | Rincon, N. (5530) | Starr | 1 | 9.73K | 31.7K | Jan 1993 – Mar 2008 |
| Slick O-4-12822 | Frost, W. (Orive Sand) | Starr | 1 | 5.41K | 114K | Sep 1998 – Mar 2008 |
| Weed, J. F. O-2-8480 | Francitas, South ( Trull Sand) | Jackson | 2 | 3.35K | 31.9K | Sep 1999 – Mar 2008 |
| Slick, T.B. Estate No. 5 O-4-9929 | Rincon, S.E. (Frio 4970) | Starr | 1 | 0 | 0 | Jan 1993 – Mar 2008 |
| Weed, J. F. O-2-4059 | Francitas (-a- Sand) | Jackson | 2 | 0 | 0 | Jan 1993 – Mar 2008 |
| Weed, J. F. O-2-4042 | Francitas (Frio 7160) | Jackson | 2 | 0 | 0 | Jan 1993 – Mar 2008 |
| LA Brisa 91 O-4-12884 | Rincon (Vicksburg Lower 5480) | Starr | 1 | 0 | 0 | Feb 2000 – Mar 2008 |
| LA Brisa 91-3 G-4-163615 | Rincon (Vicksburg Upper 5480) | Starr | 1 | 0 | 1.29M | May 1997 – Jun 2007 |
| Frericks, F. L. G-2-4123 | Sheriff, West (Frio 9000) | — | 1 | 0 | 179K | Jan 1993 – Feb 2007 |
| Rio Grande Land Trust G.U. #1 O-4-12903 | Mercedes ( 3-M) | Hidalgo | 1 | 10.9K | 49K | Aug 1999 – Dec 2006 |
| Weed, J. F. O-2-4704 | Francitas, South ( 9,440) | — | 1 | 2.63K | 4.86K | Jan 1993 – Oct 2006 |
| Weed, J. F. G-2-184243 | Francitas, South ( Trull Sand) | Jackson | 1 | 0 | 5.75K | Aug 2001 – Oct 2006 |
| T. Smith GS Unit G-4-147337 | San Salvador (Consolidated Frio) | Hidalgo | 1 | 0 | 533K | Apr 1993 – Oct 2006 |
| Weed, J. F. G-2-205576 | Francitas, South ( 8,960) | Jackson | 1 | 0 | 12K | May 2004 – Aug 2006 |
| Weed, J. F. O-2-4036 | Francitas (Frio 7030) | Jackson | 1 | 0 | 0 | Jan 1993 – Mar 2006 |
| Weed, J. F. G-2-197272 | Francitas (-a- Sand) | Jackson | 1 | 0 | 3.49K | Mar 2003 – Mar 2006 |
| Weed, J.F. G-2-162389 | Wildcat | Jackson | 1 | 0 | 381 | Mar 1995 – Mar 2006 |
| Weed, J. F. G-2-46889 | Francitas, South ( 9,850) | Jackson | 1 | 0 | 0 | Jan 1993 – Mar 2006 |
| Weed, J. F. G-2-41660 | Francitas, South ( F-25) | Jackson | 1 | 0 | 0 | Jan 1993 – Mar 2006 |
| Knobles-Respondek Unit G-2-171219 | Yorktown (Korth Sand) | DE Witt | 1 | 0 | 262K | Sep 1998 – Jan 2006 |
| Argl&i G-4-118701 | Mercedes (1-J) | Hidalgo | 1 | 0 | 0 | Jan 1993 – Jan 2006 |
| Weed, J. F. G-2-186384 | Francitas, South ( F-18) | Jackson | 1 | 0 | 7.59K | Aug 2001 – Dec 2005 |
| Martin, T. G-1-149429 | Hostetter (Wilcox A) | McMullen | 1 | 0 | 1.54M | May 1994 – Jun 2005 |