| South Texas Syndicate -A- O-1-6008 | Caribbean Energy LLC II only | Green Branch (4600) | McMullen | 5 | 418K | 825 | by Jan 1993 – Aug 2026 |
| South Texas Syndicate -B- O-1-4971 | Caribbean Energy LLC II only | Camaron Ranch (Queen City) | La Salle | 12 | 364K | 154 | by Jan 1993 – Aug 2026 |
| South Texas Syndicate -B- O-1-3694 | Caribbean Energy LLC II only | Little Alamo | McMullen | 12 | 315K | 21 | by Jan 1993 – Aug 2026 |
| South Texas Syndicate G-1-270312 | Verdun Oil & Gas LLC only | Hawkville (Eagleford Shale) | La Salle | 1 | 286K | 2.08M | Apr 2013 – Aug 2026 |
| South Texas Syndicate G-1-268310 | Verdun Oil & Gas LLC only | Hawkville (Eagleford Shale) | La Salle | 1 | 250K | 1.8M | Oct 2011 – Aug 2026 |
| South Texas Syndicate G-1-276119 | Verdun Oil & Gas LLC only | Hawkville (Eagleford Shale) | La Salle | 1 | 240K | 1.6M | Nov 2014 – Aug 2026 |
| South Texas Syndicate -A- O-1-14547 | Caribbean Energy LLC II only | Green Branch | McMullen | 2 | 225K | 0 | Oct 2004 – Aug 2026 |
| South Texas Syndicate G-1-274907 | Verdun Oil & Gas LLC only | Hawkville (Eagleford Shale) | La Salle | 1 | 217K | 1.8M | Oct 2014 – Aug 2026 |
| South Texas Syndicate -A- O-1-6497 | Caribbean Energy LLC II only | Green Branch (Queen City) | McMullen | 5 | 204K | 113 | by Jan 1993 – Aug 2026 |
| South Texas Syndicate G-1-268315 | Verdun Oil & Gas LLC only | Hawkville (Eagleford Shale) | La Salle | 1 | 199K | 1.71M | Oct 2011 – Aug 2026 |
| South Texas Syndicate G-1-282291 | Verdun Oil & Gas LLC only | Hawkville (Eagleford Shale) | La Salle | 1 | 194K | 1.69M | Feb 2017 – Aug 2026 |
| South Texas Syndicate G-1-260340 | Verdun Oil & Gas LLC only | Hawkville (Eagleford Shale) | La Salle | 1 | 186K | 1.17M | Oct 2011 – Aug 2026 |
| South Texas Syndicate G-1-298710 | Verdun Oil & Gas LLC only | Hawkville (Eagleford Shale) | La Salle | 1 | 185K | 1.39M | Feb 2025 – Aug 2026 |
| South Texas Syndicate G-1-275925 | Verdun Oil & Gas LLC only | Hawkville (Eagleford Shale) | La Salle | 1 | 185K | 1.65M | Dec 2014 – Jul 2026 |
| South Texas Syndicate G-1-275938 | Verdun Oil & Gas LLC only | Hawkville (Eagleford Shale) | La Salle | 1 | 181K | 1.58M | Feb 2015 – Aug 2026 |
| South Texas Syndicate G-1-269096 | Verdun Oil & Gas LLC only | Hawkville (Eagleford Shale) | La Salle | 1 | 178K | 1.55M | Jul 2012 – Aug 2026 |
| South Texas Syndicate G-1-254365 | Verdun Oil & Gas LLC only | Hawkville (Eagleford Shale) | La Salle | 1 | 167K | 1.5M | Jul 2009 – Aug 2024 |
| South Texas Syndicate G-1-275662 | Verdun Oil & Gas LLC only | Hawkville (Eagleford Shale) | La Salle | 1 | 159K | 1.31M | Sep 2014 – Aug 2026 |
| South Texas Syndicate G-1-298713 | Verdun Oil & Gas LLC only | Hawkville (Eagleford Shale) | La Salle | 1 | 150K | 1.26M | Feb 2025 – Aug 2026 |
| South Texas Syndicate G-1-297312 | Verdun Oil & Gas LLC only | Hawkville (Eagleford Shale) | La Salle | 1 | 149K | 1.16M | Feb 2024 – Aug 2026 |
| South Texas Syndicate G-1-282333 | Verdun Oil & Gas LLC only | Hawkville (Eagleford Shale) | La Salle | 1 | 148K | 1.92M | Feb 2017 – Aug 2026 |
| South Texas Syndicate G-1-284669 | Verdun Oil & Gas LLC only | Hawkville (Eagleford Shale) | La Salle | 1 | 143K | 1.8M | Jul 2017 – Aug 2026 |
| South Texas Syndicate G-1-300821 | Verdun Oil & Gas LLC only | Hawkville (Eagleford Shale) | La Salle | 1 | 133K | 1.13M | Oct 2025 – Aug 2026 |
| South Texas Syndicate G-1-300708 | Verdun Oil & Gas LLC only | Hawkville (Eagleford Shale) | La Salle | 1 | 124K | 1.01M | Oct 2025 – Aug 2026 |
| South Texas Syndicate G-1-284673 | Verdun Oil & Gas LLC only | Hawkville (Eagleford Shale) | La Salle | 1 | 123K | 1.46M | Jul 2017 – Jul 2026 |
| South Texas Syndicate G-1-269092 | Verdun Oil & Gas LLC only | Hawkville (Eagleford Shale) | La Salle | 1 | 122K | 1.57M | Jul 2012 – Aug 2026 |
| South Texas Syndicate G-1-269294 | Verdun Oil & Gas LLC only | Hawkville (Eagleford Shale) | La Salle | 1 | 120K | 1.11M | Sep 2012 – Jul 2026 |
| South Texas Syndicate O-1-3224 | Caribbean Energy LLC II only | Jack Frost (Crockett) | La Salle | 13 | 118K | 21 | by Jan 1993 – Aug 2026 |
| South Texas Syndicate G-1-296145 | Verdun Oil & Gas LLC only | Hawkville (Eagleford Shale) | La Salle | 1 | 112K | 3.45M | Jul 2023 – Aug 2026 |
| South Texas Syndicate G-1-277916 | Verdun Oil & Gas LLC only | Hawkville (Eagleford Shale) | La Salle | 1 | 109K | 869K | Oct 2015 – Aug 2026 |
| South Texas Syndicate G-1-270945 | Verdun Oil & Gas LLC only | Hawkville (Eagleford Shale) | La Salle | 1 | 108K | 2M | Apr 2013 – Aug 2026 |
| South Texas Syndicate G-1-285709 | Verdun Oil & Gas LLC only | Hawkville (Eagleford Shale) | La Salle | 1 | 104K | 1.56M | Jul 2018 – Aug 2026 |
| South Texas Syndicate G-1-298707 | Verdun Oil & Gas LLC only | Hawkville (Eagleford Shale) | La Salle | 1 | 104K | 4.53M | Feb 2025 – Aug 2026 |
| South Texas Syndicate G-1-282332 | Verdun Oil & Gas LLC only | Hawkville (Eagleford Shale) | La Salle | 1 | 101K | 1.54M | Feb 2017 – Aug 2026 |
| South Texas Syndicate G-1-297311 | Verdun Oil & Gas LLC only | Hawkville (Eagleford Shale) | La Salle | 1 | 99.6K | 1.04M | Feb 2024 – Aug 2026 |
| South Texas Syndicate G-1-270416 | Verdun Oil & Gas LLC only | Hawkville (Eagleford Shale) | La Salle | 1 | 98.3K | 767K | Apr 2013 – Aug 2026 |
| South Texas Syndicate G-1-275071 | Verdun Oil & Gas LLC only | Hawkville (Eagleford Shale) | La Salle | 1 | 96.3K | 683K | Sep 2014 – Aug 2026 |
| South Texas Syndicate G-1-268314 | Verdun Oil & Gas LLC only | Hawkville (Eagleford Shale) | La Salle | 1 | 93.6K | 815K | Oct 2011 – Aug 2026 |
| South Texas Syndicate G-1-271302 | Verdun Oil & Gas LLC only | Hawkville (Eagleford Shale) | La Salle | 1 | 92.9K | 2.48M | Jun 2013 – Aug 2026 |
| South Texas Syndicate G-1-285388 | Verdun Oil & Gas LLC only | Hawkville (Eagleford Shale) | La Salle | 1 | 91.2K | 1.71M | Jul 2018 – Aug 2026 |
| South Texas Syndicate G-1-282047 | Verdun Oil & Gas LLC only | Hawkville (Eagleford Shale) | La Salle | 1 | 90.6K | 3.14M | Feb 2017 – Aug 2026 |
| South Texas Syndicate G-1-255011 | Verdun Oil & Gas LLC only | Hawkville (Eagleford Shale) | La Salle | 1 | 88.3K | 4.78M | Oct 2009 – Aug 2026 |
| South Texas Syndicate G-1-285708 | Verdun Oil & Gas LLC only | Hawkville (Eagleford Shale) | La Salle | 1 | 88.1K | 1.38M | Jul 2018 – Mar 2025 |
| South Texas Syndicate G-1-278266 | Verdun Oil & Gas LLC only | Hawkville (Eagleford Shale) | La Salle | 1 | 86.2K | 598K | Oct 2015 – Aug 2026 |
| South Texas Syndicate G-1-285707 | Verdun Oil & Gas LLC only | Hawkville (Eagleford Shale) | La Salle | 1 | 86.1K | 1.39M | Jul 2018 – Aug 2026 |
| South Texas Syndicate G-1-285387 | Verdun Oil & Gas LLC only | Hawkville (Eagleford Shale) | La Salle | 1 | 85.2K | 1.8M | Jul 2018 – Aug 2026 |
| South Texas Syndicate G-1-277758 | Verdun Oil & Gas LLC only | Hawkville (Eagleford Shale) | La Salle | 1 | 78.5K | 616K | Oct 2015 – Aug 2026 |
| South Texas Syndicate 1391-42 O-1-14309 | White Oak Operating Company LLC only | Washburn, East (5100) | La Salle | 2 | 77.5K | 35.6K | Aug 2000 – Jan 2010 |
| South Texas Syndicate G-1-272022 | Verdun Oil & Gas LLC only | Hawkville (Eagleford Shale) | La Salle | 1 | 77.3K | 744K | Sep 2013 – Jun 2026 |
| South Texas Syndicate G-1-296115 | Verdun Oil & Gas LLC only | Hawkville (Eagleford Shale) | La Salle | 1 | 74.7K | 857K | Jul 2023 – Aug 2026 |