| Alta-Ottis Gas Unit G-3-209804 | Samson Exploration, LLC only | Wadsworth, South (Tex-Miss) | Matagorda | 1 | 19.8K | 1.27M | Mar 2005 – Aug 2013 |
| Burkhart Gas Unit G-3-219022 | Atlas Operating LLC only | Silverspoon (Tex SA1 Sand) | Matagorda | 1 | 19.6K | 3.27M | Dec 2005 – Dec 2014 |
| Sanders O-3-19066 | Magnum Engineering Company only | Pheasant (McDonald) | Matagorda | 1 | 19.6K | 21 | by Jan 1993 – Aug 2026 |
| Grisham G-3-216124 | Hilcorp Energy Company only | Bouldin Lake (Lower Frio) | Matagorda | 1 | 19.5K | 484K | Nov 2005 – Apr 2015 |
| Rooth Rice Corporation O-3-12922 | JPF Well Service, Inc. only | Buckeye, West (7900) | Matagorda | 1 | 19.5K | 11.7K | by Jan 1993 – Dec 1996 |
| Pidco G-3-213180 | Earthstone Energy,inc. only | Camp Hulen (Middle Frio Sd.) | Matagorda | 1 | 19.3K | 174K | Oct 2005 – Mar 2012 |
| Olson, J. O. et Al O-3-20029 | Penn Virginia Oil & Gas, L.P. only | Rugeley, SW. (13200) | Matagorda | 1 | 19.3K | 413K | by Jan 1993 – Feb 2001 |
| Strnadel O-3-23419 | Sue-Ann Operating, L.C. only | Midfields (Frio 8575) | Matagorda | 1 | 19.2K | 80.6K | Feb 1998 – Nov 2004 |
| Pierce O-3-23896 | Samedan Oil Corporation only | Potthast (Upper McDonald) | Matagorda | 1 | 19.1K | 338K | Aug 2000 – Jun 2001 |
| Huebner O-3-26193 | Magnum Producing, LP only | Lucky (Huebner 8900) | Matagorda | 1 | 19K | 199K | Feb 2013 – Oct 2018 |
| Flowers Foundation G-3-197147 | Deep Rock Resources, Inc. only | Ashby (9000) | Matagorda | 1 | 18.9K | 471K | Aug 2003 – Nov 2017 |
| Richers, E. O-3-1855 | Rusk Energy Operating LLC only | Hamman | Matagorda | 1 | 18.9K | 41 | by Jan 1993 – Mar 2020 |
| Pierce G-3-223952 | Kebo Oil & Gas, Inc. only | Blessing (Frio 8430) | Matagorda | 1 | 18.8K | 159K | Mar 2006 – Apr 2014 |
| Wolf Heirs G-3-192886 | Kirkpatrick, John Oil LLC only | Lucky, West (Gola) | Matagorda | 1 | 18.8K | 318K | Oct 2002 – Jul 2018 |
| Goodall-Doss Gas Unit G-3-174072 | EOG Resources, Inc. only | Wadsworth, South (Doss) | Matagorda | 1 | 18.8K | 1.11M | Aug 1999 – Aug 2002 |
| Burkhart Gas Unit G-3-230811 | Devon Energy Production Co, L.P. only | Silverspoon (Tex SA1 Sand) | Matagorda | 1 | 18.5K | 2.52M | Aug 2007 – Dec 2008 |
| Petrucha Unit #2 O-3-21313 | Remora Operating, LLC only | Petrucha (11,480) | Matagorda | 2 | 18.3K | 753K | by Jan 1993 – Dec 2017 |
| Lewis, J. C. O-3-21941 | Expro Engineering, Inc. only | Duncan Slough (Frio-3) | Matagorda | 1 | 17.9K | 241K | by Jan 1993 – Sep 2006 |
| Hicki, E. L. et Al G-3-74164 | Sandel Operating Company only | Mellon (10500) | Matagorda | 1 | 17.6K | 1.54M | by Jan 1993 – Apr 2019 |
| Heffelfinger-Sartwelle O-3-26972 | Langston Oil, LLC only | Tidehaven (Frio, Upper) | Matagorda | 1 | 17.4K | 9.87K | Mar 2014 – Nov 2021 |
| Milberger G-3-209426 | Rap Operating, L.L.C. only | Hamman, East (11,200 Frio) | Matagorda | 1 | 17.4K | 239K | Dec 2004 – Jul 2010 |
| Buckeye Ranch Unit G-3-271146 | Tri-C Resources Partners I, LLC only | Duncan Slough (Frio Cons.) | Matagorda | 1 | 17.2K | 312K | Oct 2013 – Apr 2024 |
| Grant, John F. O-3-18405 | Oak Energy, LLC only | Sugar Valley, N. (Thomasson) | Matagorda | 1 | 17.2K | 21.7K | by Jan 1993 – Mar 2005 |
| Henry Rugeley O-3-27013 | Texian Operating Company, LLC only | Bay City (8650 Frio) | Matagorda | 1 | 17.1K | 42.5K | May 2016 – Aug 2026 |
| Duncan Ranch "A" G-3-244604 | Milagro Exploration, LLC only | Hollywood, South (Frio 7900) | Matagorda | 1 | 16.7K | 1.09M | Dec 2008 – Oct 2012 |
| Lewis & McDonald G-3-174706 | Delta Exploration Company, Inc. only | Wilson Creek (Frio 10500) | Matagorda | 1 | 16.5K | 929K | Aug 1999 – Aug 2002 |
| Myers, N. R. O-3-2977 | KZ Global Energy, LLC only | Markham | Matagorda | 2 | 16.4K | 22 | by Jan 1993 – Jul 2026 |
| Anderson O-3-20712 | Gel Petroleum, Inc. only | Lucky, East (Huebner) | Matagorda | 2 | 16.3K | 12.9K | by Jan 1993 – Aug 2005 |
| Bouldin-Taylor G-3-291536 | Ponderosa Oil & Gas, LLC only | Sugar Valley (Gravier) | Matagorda | 1 | 16.3K | 101K | Oct 2021 – May 2023 |
| Taylor G-3-201047 | Siana Oil & Gas only | Sugar Valley, S. (Frio 11700) | Matagorda | 1 | 16.2K | 1.11M | Apr 2004 – Jun 2015 |
| Wyse G-3-220325 | Hilcorp Energy Company only | Bouldin Lake (Lower Frio) | Matagorda | 1 | 16K | 142K | May 2005 – Jul 2016 |
| First National Bank O-3-22479 | Sue-Ann Production Company only | Midfields, (Frio 8925) | Matagorda | 1 | 16K | 176K | Aug 1994 – Jun 1996 |
| Laraine Collup Oil Unit O-3-22204 | Expro Engineering, Inc. only | Midfields, SW. (8800) | Matagorda | 1 | 15.8K | 80.3K | Oct 1993 – Aug 2005 |
| Beulah G-3-236946 | Halex Oil Corporation only | Potthast (Middle Tex Miss) | Matagorda | 1 | 15.5K | 129K | May 2008 – Nov 2011 |
| Blessing Unit G-3-223955 | GTG Operating, LLC only | Pheasant, East (Frio 10300) | Matagorda | 1 | 15.5K | 342K | Sep 2006 – Jun 2020 |
| West Blessing G-3-242361 | Dallas Petroleum Group, LLC only | Potthast (Middle Tex Miss) | Matagorda | 1 | 15.5K | 141K | Apr 2008 – Feb 2020 |
| Zapalac Gas Unit G-3-233372 | Gulf Coast Acquisitions Co. L.C. only | Lario (10400) | Matagorda | 1 | 15.4K | 486K | Jan 2008 – Mar 2010 |
| Blessing Unit No. 2 G-3-221662 | GTG Operating, LLC only | Potthast (Middle Tex Miss) | Matagorda | 1 | 15.1K | 199K | Jan 2006 – Jul 2025 |
| Dawdy G-3-158764 | Sue-Ann Operating, L.C. only | Lucky, West ( Sloan Sand) | Matagorda | 1 | 15K | 774K | Mar 1996 – Jun 2002 |
| Horak Gas Unit G-3-225126 | South Bay Resources, L.L.C. only | Hamman, East (11,200 Frio) | Matagorda | 1 | 15K | 342K | Jan 2007 – Jul 2010 |
| Strnadel G-3-159419 | Sue-Ann Operating, L.C. only | Midfields, West (-D-, Upper) | Matagorda | 1 | 15K | 867K | Jul 1996 – Nov 2004 |
| Olson, JO et Al G-3-90935 | Hilcorp Energy Company only | Rugeley,sw (14400) | Matagorda | 1 | 14.9K | 288K | by Jan 1993 – Aug 2026 |
| Pidco G-3-145716 | Basic Earth Science Systems,inc. only | Camp Hulen (Middle Frio Sd.) | Matagorda | 1 | 14.8K | 148K | Apr 1993 – Jan 1994 |
| Savage "A" O-3-20999 | Neg Operating LLC only | Wadsworth (a-2, SE. Seq.) | Matagorda | 1 | 14.8K | 695 | by Jan 1993 – Dec 2001 |
| Old Ocean Unit G-3-203429 | Hilcorp Energy Company only | Old Ocean (F-10) | Matagorda | 1 | 14.7K | 1.12M | Jul 2004 – Mar 2026 |
| Heffelfinger, Grace P., -C- O-3-8070 | Rusk Energy Operating LLC only | Tidehaven ( 8,700) | Matagorda | 1 | 14.7K | 40 | by Jan 1993 – Mar 2021 |
| Metzger Gas Unit G-3-137674 | Atlas Operating LLC only | Bay City, East (8150 FB-A) | Matagorda | 1 | 14.7K | 346K | by Jan 1993 – Oct 2020 |
| Cornelius, L. G-3-218804 | Rumble Energy LLC only | Wadsworth (10,400 Frio) | Matagorda | 1 | 14.5K | 443K | Dec 2005 – Dec 2012 |
| Wilson Creek G-3-295977 | Gemarmi Inc. only | Wilson Creek (10000 Sd. FB-C) | Matagorda | 1 | 14.5K | 308K | Feb 2023 – May 2024 |
| Cornelius, L. G-3-227953 | Rumble Energy LLC only | Wadsworth, South (Tex-Miss) | Matagorda | 1 | 14.5K | 1.23M | Aug 2006 – Dec 2015 |