| Ohio-Sun Unit O-3-2998 | Goldking Minerals Mgmt, L.L.C. only | Markham N.-Bay City,n(cornelius) | Matagorda | 53 | 1.05M | 1.25M | by Jan 1993 – Aug 2026 |
| Ohio-Sun Unit O-3-2997 | Goldking Minerals Mgmt, L.L.C. only | Markham N.-Bay City, N (Cayce) | Matagorda | 27 | 753K | 456K | by Jan 1993 – Aug 2026 |
| Cobb, F. G. -B- O-3-9504 | Texian Operating Company, LLC only | Bay City (7700 Frio) | Matagorda | 9 | 417K | 504K | by Jan 1993 – Aug 2026 |
| Cobb, F. G. -B- O-3-9470 | Texian Operating Company, LLC only | Bay City (7500 Frio) | Matagorda | 8 | 238K | 248K | by Jan 1993 – Aug 2026 |
| Ohio-Sun Unit O-3-2996 | Goldking Minerals Mgmt, L.L.C. only | Markham N.-Bay City, N (Carlson) | Matagorda | 21 | 223K | 362K | by Jan 1993 – Jan 2025 |
| Moore Estate O-3-7353 | Apache Corporation only | Bay City (8650 Frio) | Matagorda | 1 | 199K | 279K | Sep 1994 – Jan 2008 |
| Cobb, F.G. -A- O-3-20364 | Texian Operating Company, LLC only | Bay City (7000 Frio) | Matagorda | 1 | 192K | 184K | by Jan 1993 – Aug 2026 |
| Cobb, F. G. -B- O-3-9483 | Texian Operating Company, LLC only | Bay City (7900 Frio) | Matagorda | 13 | 180K | 293K | by Jan 1993 – Dec 2005 |
| Johnson, Sallie O-3-9495 | Texian Operating Company, LLC only | Bay City (8200 Frio) | Matagorda | 1 | 147K | 354K | by Jan 1993 – Aug 2026 |
| Cobb, F. G. -B- O-3-9500 | Urban Oil & Gas Group, LLC only | Bay City (8500 Frio) | Matagorda | 3 | 132K | 281K | by Jan 1993 – Sep 2018 |
| Ohio-Sun Unit O-3-11585 | Goldking Minerals Mgmt, L.L.C. only | Markham,n.-Bay City,n (7685) | Matagorda | 9 | 120K | 139K | by Jan 1993 – Jun 2024 |
| Cobb, F.G. "B" O-3-20608 | Texian Operating Company, LLC only | Bay City (8600 Frio) | Matagorda | 1 | 110K | 242K | by Jan 1993 – Jul 2025 |
| Cobb, F. G. -B- O-3-24446 | Texian Operating Company, LLC only | Bay City (7450) | Matagorda | 1 | 105K | 149K | Sep 2003 – Aug 2026 |
| Moore Estate O-3-9467 | Texian Operating Company, LLC only | Bay City (7000 Frio) | Matagorda | 2 | 93.5K | 329K | by Jan 1993 – Aug 2026 |
| Cobb, F. G. -B- O-3-9493 | Urban Oil & Gas Group, LLC only | Bay City (8200 Frio) | Matagorda | 7 | 81.7K | 105K | by Jan 1993 – Jun 2006 |
| F. G. Cobb "A" O-3-24389 | Texian Operating Company, LLC only | Bay City (7500 Frio) | Matagorda | 1 | 81.3K | 59.2K | Aug 2003 – Aug 2026 |
| Rugeley, Henry O-3-21262 | Apache Corporation only | Bay City (8800 Frio) | Matagorda | 1 | 81.1K | 249K | by Jan 1993 – Apr 2006 |
| Ohio-Sun Unit O-3-2999 | Goldking Minerals Mgmt, L.L.C. only | Markham N.-Bay City,n (McDonald) | Matagorda | 13 | 69.8K | 107K | by Jan 1993 – May 2026 |
| Duran, Fannie P. O-3-20412 | Spur Operating Co. only | Linnville Bayou (8900) | Matagorda | 2 | 63.2K | 53.3K | by Jan 1993 – Feb 2002 |
| Milberger Gas Unit G-3-211023 | South Bay Resources, L.L.C. only | Hamman, East (11,200 Frio) | Matagorda | 1 | 62.5K | 1.32M | Aug 2005 – May 2013 |
| Rugeley, Henry O-3-20407 | Texian Operating Company, LLC only | Bay City (8700 Frio) | Matagorda | 2 | 61.6K | 223K | by Jan 1993 – Mar 2021 |
| Linnville O-3-25286 | Texakoma Operating, L.P. only | Linnville Bayou (8600) | Matagorda | 1 | 61.2K | 59.7K | Jan 2009 – Aug 2014 |
| Duncan O-3-27221 | Charolais Energy, LLC only | Bay Prairie (Frio 6300) | Matagorda | 1 | 59.5K | 0 | Nov 2016 – Jul 2026 |
| Ohio-Sun Unit O-3-12601 | Goldking Minerals Mgmt, L.L.C. only | Markham N.-Bay City, N (Betts) | Matagorda | 12 | 58.3K | 116K | by Jan 1993 – Jun 2022 |
| Talafuse G-3-212241 | South Bay Resources, L.L.C. only | Hamman, East (11,200 Frio) | Matagorda | 1 | 53.8K | 1.5M | Nov 2005 – Dec 2011 |
| Runnells O-3-27630 | Fairway Operating, Inc. only | Markham N.-Bay City, N (Carlson) | Matagorda | 1 | 53.2K | 46.8K | Sep 2019 – Aug 2026 |
| Cobb, F. G. -B- O-3-9465 | Texian Operating Company, LLC only | Bay City (7000 Frio) | Matagorda | 7 | 49.3K | 98.5K | by Jan 1993 – Aug 2026 |
| F. G. Cobb B O-3-25806 | Texian Operating Company, LLC only | Bay City (7200 Frio) | Matagorda | 1 | 47.7K | 55.4K | Sep 2011 – Aug 2026 |
| Cobb, F.G.-B- O-3-24517 | Apache Corporation only | Bay City (7600 Frio) | Matagorda | 1 | 43.9K | 28.8K | May 2003 – Aug 2005 |
| East Matagorda Bay Unit O-3-23455 | Meridian Resource & Expl Llc,the only | Maverick Bayou (Cib. Haz.) | Matagorda | 1 | 43.7K | 117K | Aug 1997 – Jun 1998 |
| Moore Estate O-3-9618 | Apache Corporation only | Bay City (8480 Frio) | Matagorda | 3 | 43K | 73.2K | by Jan 1993 – Mar 1996 |
| Rugeley, Henry O-3-7352 | Apache Corporation only | Bay City (8650 Frio) | Matagorda | 1 | 40.8K | 49.9K | by Jan 1993 – Apr 1999 |
| Moore Estate O-3-22791 | Texian Operating Company, LLC only | Bay City (7500 Frio) | Matagorda | 1 | 39K | 68K | Oct 1995 – Aug 2002 |
| Bay City Unit No. 19 O-3-8273 | Atlas Operating LLC only | Bay City, E ( Parker Sand) | Matagorda | 1 | 36.9K | 48.6K | by Jan 1993 – Aug 2025 |
| Linnville O-3-25453 | Texakoma Operating, L.P. only | Linnville Bayou (8700) | Matagorda | 1 | 32.5K | 37.5K | Dec 2009 – Dec 2015 |
| Cobb, F. G. 'B' O-3-26134 | Texian Operating Company, LLC only | Bay City (7450, E.) | Matagorda | 1 | 27.7K | 52.6K | Feb 2013 – Aug 2026 |
| Milberger Gas Unit G-3-246582 | South Bay Resources, L.L.C. only | Hamman, East (11,200 Frio) | Matagorda | 1 | 27.1K | 303K | Feb 2008 – Jul 2010 |
| Bay City Unit No. 25 O-3-8249 | Atlas Operating LLC only | Bay City, East ( 8500 Badough) | Matagorda | 2 | 24.4K | 45.1K | by Jan 1993 – Aug 2019 |
| Cobb, F. G. -B- O-3-22696 | Apache Corporation only | Bay City (7850 Frio) | Matagorda | 1 | 24.1K | 62.8K | Apr 1995 – Jul 2004 |
| Grimes GU G-3-216896 | South Bay Resources, L.L.C. only | Hamman, East (11,500) | Matagorda | 1 | 23.4K | 1.1M | Aug 2006 – Aug 2010 |
| Bay City Unit No. 26 O-3-8406 | Gaither Petroleum Corporation only | Bay City, E ( Parker Sand) | Matagorda | 1 | 23K | 54.7K | by Jan 1993 – Oct 2008 |
| Badouh, E. M. Heirs G-3-179728 | Tri-C Resources Partners I, LLC only | Bucks Bayou (Frio Tex 2) | Matagorda | 1 | 21.5K | 3.25M | Aug 2000 – Aug 2026 |
| Henry Rugeley O-3-27013 | Texian Operating Company, LLC only | Bay City (8650 Frio) | Matagorda | 1 | 17.1K | 42.5K | May 2016 – Aug 2026 |
| 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 |
| 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 |
| Ohio-Sun Unit G-3-167197 | Remora Management, LLC only | Markham N.-Bay CITY,N(MARK.7900) | Matagorda | 1 | 13.6K | 263K | Feb 1998 – Apr 2002 |
| Cobb, F. G. B O-3-23919 | Urban Oil & Gas Group, LLC only | Bay City (7430 Frio) | Matagorda | 1 | 13.6K | 151K | Feb 2000 – Nov 2019 |
| Ohio-Sun Unit G-3-147825 | Goldking Minerals Mgmt, L.L.C. only | Markham N.-Bay City, N (Braman) | Matagorda | 1 | 12.9K | 865K | Dec 1993 – Feb 2018 |
| Cobb, F. G. "B" O-3-22962 | Apache Corporation only | Bay City (8000 Frio) | Matagorda | 1 | 12.8K | 31K | May 1996 – May 1999 |
| Union Central Life Ins Co. GU G-3-233773 | EOG Resources, Inc. only | Bucks Bayou (Frio Tex 2) | Matagorda | 1 | 12.6K | 2.42M | Jan 2008 – Jun 2015 |