| South Texas Syndicate -A- O-1-6008 | Green Branch (4600) | McMullen | 5 | 417K | 825 | Jan 1993 – Jul 2026 |
| South Texas Syndicate -B- O-1-4971 | Camaron Ranch (Queen City) | LA Salle | 12 | 363K | 154 | Jan 1993 – Jul 2026 |
| South Texas Syndicate -B- O-1-3694 | Little Alamo | McMullen | 12 | 313K | 21 | Jan 1993 – Jul 2026 |
| South Texas Syndicate -A- O-1-14547 | Green Branch | McMullen | 2 | 223K | 0 | Oct 2004 – Jul 2026 |
| South Texas Syndicate -A- O-1-6497 | Green Branch (Queen City) | McMullen | 5 | 202K | 113 | Jan 1993 – Jul 2026 |
| Duval County Ranch Co. State -P- O-4-1655 | Lopez, North (Lopez) | Duval | 9 | 138K | 20 | Jan 1993 – Jul 2026 |
| Duval Co. Ranch Co.-State -L- O-4-557 | Colmena | Duval | 36 | 133K | 20 | Jan 1993 – Jul 2026 |
| Duval Co. Ranch Co. -C- O-4-1654 | Lopez, North (Lopez) | Duval | 3 | 130K | 20 | Jan 1993 – Jul 2026 |
| South Texas Syndicate O-1-3224 | Jack Frost (Crockett) | LA Salle | 13 | 117K | 21 | Jan 1993 – Jul 2026 |
| Duval Co. Ranch Co. -D- O-4-556 | Colmena | Duval | 11 | 102K | 20 | Jan 1993 – Jul 2026 |
| Duval County Ranch Co.-State -F- O-4-438 | Cedro Hill | Duval | 9 | 86.6K | 20 | Jan 1993 – Jul 2026 |
| D.C.R.C. Section 55 O-4-10583 | Colmena | Duval | 4 | 83.3K | 20 | Jan 1993 – Jul 2026 |
| South Texas Syndicate -A- O-1-14577 | Green Branch (5500) | McMullen | 1 | 63.2K | 164K | Jan 2005 – Jul 2026 |
| Alamo Natl Bnk., Trustee O-1-3424 | Jack Frost (Crockett) | LA Salle | 5 | 59.8K | 21 | Jan 1993 – Jul 2026 |
| South Texas Syndicate -B- O-1-14580 | Jourdanton (Sparta Sand) | LA Salle | 2 | 55.6K | 0 | Jan 2004 – Jul 2026 |
| Dcrc NCT-29 O-4-9826 | Brelum (Chernosky) | Duval | 1 | 33.3K | 19 | Jan 1993 – Jul 2026 |
| Dcrc NCT-29 O-4-9671 | Brelum (Chernosky, N.) | Duval | 1 | 33.3K | 19 | Jan 1993 – Jul 2026 |
| Brelum Field Unit O-4-7121 | Brelum (Govt. Wells Sand) | — | 15 | 30.9K | 19 | Jan 1993 – Jul 2026 |
| Smith Oil Unit O-4-11485 | Gregg Wood (1400) | Starr | 1 | 30.9K | 21 | Jan 1993 – Jul 2026 |
| Wood "A" G-4-159195 | Arroyo Los Olmos (Yegua 25) | Starr | 1 | 0 | 290K | May 1996 – Jul 2026 |
| Wood "B" G-4-159201 | Arroyo Los Olmos (Yegua 25) | Starr | 1 | 0 | 919K | Apr 1996 – Jul 2026 |
| Wood "A" G-4-202354 | Arroyo Los Olmos (Middle Yegua) | Starr | 1 | 0 | 1.44K | Dec 2002 – Jul 2026 |
| Guerra State Gas Unit G-4-214733 | Gregg Wood, S. (4160) | Starr | 1 | 0 | 14.7K | Oct 2005 – Jul 2026 |
| Ricaby Trust G-4-216673 | Gregg Wood, S. (5250) | Starr | 1 | 0 | 246K | Oct 2005 – Jul 2026 |
| Dcrc "a" NCT-17 O-4-11033 | Wildcat | Duval | 1 | 0 | 0 | Jan 1993 – Jul 2026 |
| Rodriguez G-4-210315 | Gregg Wood (Yegua 5190) | Starr | 1 | 0 | 261K | Apr 2005 – Jul 2026 |
| Duval County Ranch Co., -G- G-4-35381 | Cedro Hill (1400) | — | 1 | 0 | 1.08K | Jan 1993 – Jul 2026 |
| Zarsky, Frank G-4-35549 | Gregg Wood, West (5450) | — | 1 | 0 | 0 | Jan 1993 – Jul 2026 |
| Zarsky, Frank G-4-35550 | Gregg Wood, West (5350) | — | 1 | 0 | 715K | Jan 1993 – Jul 2026 |
| Groos National Bank G-4-41927 | Gregg Wood, S. (5350) | — | 1 | 0 | 4.55M | Jan 1993 – Jul 2026 |
| Groos National Bank G-4-42162 | Gregg Wood, S (4100) | — | 1 | 0 | 0 | Jan 1993 – Jul 2026 |
| Rodriguez, T. G-4-47679 | Gregg Wood, S. (3950 W.) | Starr | 1 | 0 | 837K | Jan 1993 – Jul 2026 |
| Rodriquez, T. G-4-123138 | Gregg Wood, S. (4160) | Starr | 1 | 0 | 0 | Jan 1993 – Jul 2026 |
| Rodriquez G-4-123250 | Gregg Wood, S. (3950) | Starr | 1 | 0 | 31 | Jan 1993 – Jul 2026 |
| Block-Guerra G-4-127383 | Arroyo Los Olmos (Yegua 25) | Starr | 1 | 0 | 646K | Jan 1993 – Jul 2026 |
| Groos National Bank G-4-128801 | Arroyo Los Olmos (Yegua 25) | Starr | 1 | 0 | 2.08M | Jan 1993 – Jul 2026 |
| Groos National Bank G-4-145003 | Gregg Wood, S. (3950 W.) | Starr | 1 | 0 | 232K | Mar 1993 – Jul 2026 |
| Block/Guerra Gas Unit G-4-148549 | Arroyo Los Olmos (Yegua 25) | Starr | 1 | 0 | 1.09M | Dec 1993 – Jul 2026 |
| Guerra State GU G-4-148569 | Gregg Wood, S. (3950) | Starr | 1 | 0 | 485K | Jan 1994 – Jul 2026 |
| Wood "A" G-4-157769 | Arroyo Los Olmos (Yegua 25) | Starr | 1 | 0 | 5.25M | Feb 1996 – Jul 2026 |
| Wood "A" G-4-157779 | Arroyo Los Olmos (Yegua 25) | Starr | 1 | 0 | 1.3M | Feb 1996 – Jul 2026 |
| Wood "B" G-4-157796 | Arroyo Los Olmos (Yegua 25) | Starr | 1 | 0 | 782K | Feb 1996 – Jul 2026 |
| Wood "B" G-4-157799 | Arroyo Los Olmos (Yegua 25) | Starr | 1 | 0 | 303K | Feb 1996 – Jul 2026 |
| Wood "A" G-4-158086 | Arroyo Los Olmos (Yegua 25) | Starr | 1 | 0 | 527K | Mar 1996 – Jul 2026 |
| Dietze SWD G-1-278072 | Mula Pasture (Edwards Lime) | LA Salle | 1 | 0 | 0 | Jan 2015 – Nov 2021 |