| Marchbanks O-4-13765 | Awp Operating Company only | Tesoro (5000 Pettus) | Duval | 2 | 351K | 51.9K | Dec 2012 – Jul 2026 |
| Marchbanks-Cadena 'B' G-4-215828 | Crossroads Petroleum L.L.C. only | Orcones (Frio-Vksbg Cons.) | Duval | 1 | 168K | 1.54M | Oct 2005 – Jan 2023 |
| Alta-Marchbanks O-4-13291 | Tepee Petroleum Co., Inc. only | Tesoro (5000 Pettus) | Duval | 1 | 118K | 38.3K | Feb 2005 – Jul 2010 |
| Frost Bank G-4-212586 | Finaly Resources LLC only | Lopez, SE. (Consolidated) | Duval | 1 | 45K | 2.21M | Aug 2005 – Aug 2026 |
| Marchbanks-Cadena Gas Unit #1 G-4-215945 | Crossroads Petroleum L.L.C. only | Orcones (Frio-Vksbg Cons.) | Duval | 1 | 41.9K | 605K | Jan 2006 – Nov 2021 |
| Marchbanks O-4-14124 | Awp Operating Company only | Tesoro (Cole Upper 3640) | Duval | 1 | 40.2K | 0 | Jul 2019 – Jul 2026 |
| Frost Bank G-4-211514 | Finaly Resources LLC only | Lopez, SE. (Consolidated) | Duval | 1 | 36.9K | 2.74M | Jul 2005 – Aug 2026 |
| Frost National Bank 65 G-4-168279 | Block "T" Petroleum, Inc. only | Rosita (Wilcox P) | Duval | 1 | 28.4K | 3.19M | Apr 1998 – Jul 2026 |
| Marchbanks-Cadena G-4-210976 | Green Exploration Company only | Orcones (Frio-Vksbg Cons.) | Duval | 1 | 23.2K | 468K | May 2005 – Nov 2016 |
| Marchbanks-Cadena Gas Unit #1 G-4-212935 | Green Exploration Company only | Orcones (Frio-Vksbg Cons.) | Duval | 1 | 13.8K | 969K | Jul 2005 – Sep 2017 |
| Marchbanks Cadena et Al G-4-233158 | Green Exploration Company only | Orcones (Frio-Vksbg Cons.) | Duval | 1 | 11.9K | 257K | Nov 2007 – Jul 2016 |
| Marchbanks-Cadena G-4-205938 | Green Exploration Company only | Orcones (Frio-Vksbg Cons.) | Duval | 1 | 11K | 398K | Nov 2004 – Sep 2017 |
| Frost Bank/Peal Ranch Unit G-4-230687 | Orx Resources, L.L.C. only | Lopez, SE. (Consolidated) | Duval | 1 | 9.31K | 1.15M | Sep 2007 – Dec 2025 |
| Dallas Joint Stock Land Bank -F- O-4-8545 | Trento Global Group Operator Tex only | Peters (Argo 2350) | Duval | 1 | 6.54K | 69 | by Jan 1993 – Sep 2016 |
| Frost Bank G-4-221497 | Finaly Resources LLC only | Lopez, SE. (Consolidated) | Duval | 1 | 6.15K | 201K | May 2006 – May 2020 |
| Dallas Joint Stock Land Bank -F- O-4-6126 | Trento Global Group Operator Tex only | Peters, North (Argo 2220) | Duval | 1 | 5.31K | 68 | by Jan 1993 – Mar 2016 |
| Marchbanks-Cadena Gas Unit #1 O-4-14148 | Crossroads Petroleum L.L.C. only | Orcones (Frio-Vksbg Cons.) | Duval | 1 | 4.49K | 0 | Jan 2020 – Aug 2023 |
| Frost Bank G-4-222704 | Finaly Resources LLC only | Lopez, SE. (Consolidated) | Duval | 1 | 4.18K | 578K | Aug 2006 – Aug 2026 |
| Marchbanks-Cadena GU#1 O-4-13326 | Green Exploration Company only | Orcones (Frio-Vksbg Cons.) | Duval | 2 | 4.09K | 14.2K | Jan 2006 – Sep 2010 |
| Marchbanks-Cadena O-4-13313 | Magnum Producing, LP only | Atlee | Duval | 3 | 3.87K | 0 | May 2005 – Dec 2005 |
| Marchbanks "A" O-4-14159 | Awp Operating Company only | Tesoro (Cole Upper 3640) | Duval | 1 | 3.17K | 0 | Aug 2021 – Jul 2026 |
| Dallas Joint Stock Land Bank -F- O-4-8425 | Trento Global Group Operator Tex only | Hoffman | Duval | 1 | 2.2K | 0 | Sep 1999 – Dec 2013 |
| Marchbanks-Cadena G-4-216852 | Green Exploration Company only | Orcones (Frio-Vksbg Cons.) | Duval | 1 | 1.92K | 139K | Feb 2006 – Nov 2008 |
| Dallas Joint Stock Land Bank -F- O-4-2061 | Trento Global Group Operator Tex only | Peters | Duval | 1 | 1.73K | 34 | by Jan 1993 – May 2010 |
| Frost Bank G-4-222842 | Finaly Resources LLC only | Lopez, SE. (Consolidated) | Duval | 1 | 1.26K | 67.8K | Oct 2006 – Jun 2022 |
| Frost National Bank G-4-154319 | Rockdale Energy, LLC only | Rosita (Wilcox P) | Duval | 1 | 1.18K | 308K | May 1995 – Oct 1997 |
| Hubberd-Frost Nat. Bank Gas Unit G-4-137108 | Block "T" Petroleum, Inc. only | Rosita, NW (Wilcox Cons.) | Duval | 1 | 889 | 3.29M | by Jan 1993 – Jul 2026 |
| Marchbanks G-4-270852 | Awp Operating Company only | Tesoro | Duval | 1 | 832 | 161K | Nov 2013 – Oct 2014 |
| Frost National Bank Trustee "A" G-4-199220 | Thorp Petroleum Corporation only | Rancho Solo (Wilcox) | Duval | 1 | 447 | 518K | Jul 2003 – Apr 2004 |
| Marchbanks-Cadena Gas Unit #1 G-4-212934 | Magnum Producing, LP only | Atlee (4900) | Duval | 1 | 366 | 62.4K | Jul 2005 – Nov 2005 |
| Hubberd - Frost Nat'l. Bank G.U. G-4-75912 | Block "T" Petroleum, Inc. only | Rosita, NW (Wilcox Cons.) | Duval | 1 | 247 | 16.8M | by Jan 1993 – Jan 2018 |
| Eubank G-4-191670 | Carrizo Oil & Gas, Inc. only | Seis Banderas (Slick) | Duval | 1 | 167 | 646K | Dec 2001 – Jul 2003 |
| Dallas Joint Stock Land Bank -F- G-4-59992 | Coronado Minerals, LLC only | Peters, North | Duval | 1 | 150 | 167 | Mar 2011 – Sep 2012 |
| Dallas Joint Stock Land Bank -F- O-4-13748 | Trento Global Group Operator Tex only | Peters, North | Duval | 1 | 63 | 0 | Oct 2012 – Mar 2016 |
| Frost National Bank & Trust G-4-100828 | Shidler, Mark L., Inc. only | Rancho Solo (Bruni) | Duval | 1 | 60 | 961K | by Jan 1993 – Dec 2020 |
| Frost National Bank G-4-167872 | Cimarex Energy Co. of Colorado only | Rancho Solo (Wilcox F-1) | Duval | 1 | 39 | 156K | Nov 1997 – Sep 2006 |
| Hubberd-Frost Nat'l Bank G/U G-4-153324 | Block "T" Petroleum, Inc. only | Rosita, NW (Wilcox Cons.) | Duval | 1 | 29 | 5.92M | Feb 1995 – Jul 2026 |
| Frost National Bank G-4-183721 | Edge Petroleum Oper. Co., Inc. only | Muy Grande (15900 Sand) | Duval | 1 | 10 | 1.39M | Mar 2001 – Sep 2006 |
| Frost National Bank & Trust G-4-95442 | Bowman, Fred Inc. only | Rancho Solo (Wilcox) | Duval | 1 | 3 | 2.24K | by Jan 1993 – Jan 1993 |
| Marchbanks Cadena Gas Unit #1 G-4-233186 | Green Exploration Company only | Orcones (Frio-Vksbg Cons.) | Duval | 1 | 1 | 12.8K | Aug 2007 – Aug 2016 |
| Frost National Bank G-4-251886 | NI Energy LLC only | Wildcat | Duval | 1 | 0 | 0 | — |
| Hubberd-Frost Nat'l Bank G/U G-4-156291 | NI Energy LLC only | Rosita, NW (Wilcox Cons.) | Duval | 1 | 0 | 418K | Jun 1995 – Jul 1996 |
| Marchbanks, G.B. G-4-119854 | Tyludadeda, LLC only | Tesoro (3600) | Duval | 1 | 0 | 0 | — |
| Frost National Bank & Trust G-4-115769 | Bowman, Fred Inc. only | Rancho Solo (Wilcox) | Duval | 1 | 0 | 0 | — |
| Hubberd-Frost Nat'l Bank Gas Uni G-4-84076 | EOG Resources, Inc. only | Rosita, NW (Wilcox Cons.) | Duval | 1 | 0 | 157K | by Jan 1993 – Mar 1995 |
| Frost National Bank G-4-223564 | Apache Corporation only | Rancho Solo (Bruni) | Duval | 1 | 0 | 112K | Oct 2006 – Apr 2012 |
| Dallas Joint Stock Land Bank -F- G-4-67207 | Hawk Petroleum, L L C only | Peters, North | Duval | 1 | 0 | 0 | — |
| Eubank G-4-216715 | Carrizo Oil & Gas, Inc. only | Wildcat | Duval | 1 | 0 | 0 | — |
| Eubank G-4-213828 | Carrizo Oil & Gas, Inc. only | Wildcat | Duval | 1 | 0 | 0 | — |
| Frost National Bank G-4-183726 | Smith Production Inc. only | Muy Grande (FB-D) | Duval | 1 | 0 | 0 | — |