| Colby, O. C. O-3-8426 | Josey Oil Company, Ltd. only | Manvel (4970) | Brazoria | 3 | 253K | 28.7K | Jan 1993 – Apr 2026 |
| Old Ocean Unit G-3-194351 | Hilcorp Energy Company only | Old Ocean (Larsen) | Brazoria | 1 | 250K | 12.6M | Apr 2003 – Apr 2026 |
| Sebesta-Cloud O-3-24319 | JH Contract Field Services only | Angleton, NE. (Frio 9900) | Brazoria | 1 | 244K | 2.54K | Dec 2002 – May 2024 |
| Gibson "B" O-3-23837 | Cerberus Engineering, LLC only | Lochridge | Brazoria | 4 | 237K | 1.09M | May 2000 – Oct 2024 |
| Belcher B60 Unit O-3-23587 | Texcal Energy (GP) LLC only | Manvel (Oligocene, Frio D) | Brazoria | 1 | 233K | 136K | Aug 1998 – Sep 2009 |
| Hogg-Japhet O-3-4484 | Davis Energy Services LLC only | West Columbia | Brazoria | 3 | 233K | 638 | Jan 1993 – Apr 2026 |
| Houston "M" O-3-23056 | Elliott Oil & Gas Operating Co. only | Chocolate Bayou, N. (Schenck) | Brazoria | 1 | 232K | 460K | Jun 1996 – Jan 2025 |
| Borsodi O-3-11004 | Elliott Oil & Gas Operating Co. only | Chocolate Bayou ( Frio Upper) | Brazoria | 1 | 232K | 57.1K | Jan 1993 – Oct 2025 |
| Lockhart Bank Oil Unit #3 O-3-16117 | Hockley Energy, Inc. only | Alvin, South (#39) | Brazoria | 2 | 230K | 338K | Jan 1993 – May 2014 |
| Locke O-3-24201 | Pine Ridge Operating, L.P. only | Algoa, West (Frio A) | Brazoria | 1 | 226K | 229K | Mar 2002 – Feb 2020 |
| Angle G-3-154744 | Phillips Petroleum Company only | Chocolate Bayou (12,000-S) | Brazoria | 1 | 223K | 5.4M | May 1995 – Jul 2000 |
| Kitchen O-3-21812 | Atlas Operating LLC only | Chocolate Bayou ( Frio Upper) | Brazoria | 1 | 222K | 118K | Jan 1993 – Mar 2026 |
| Farms, I. P. G-3-148541 | Meridian Resource & Expl Co, The only | Chocolate Bayou (IP) | Brazoria | 1 | 219K | 19.4M | Sep 1993 – Jun 1999 |
| Smith, T. L. O-3-1124 | Deguello Operating LLC only | Damon Mound, East (FLT BLK 1) | Brazoria | 20 | 218K | 76 | Jan 1993 – Dec 2023 |
| Lewellyn, Nellie O-3-10394 | Denbury Onshore, LLC only | Manvel (F.B. II, Oligocene) | Brazoria | 2 | 213K | 133K | Jan 1993 – Aug 2015 |
| Spohn Foundation G-3-280236 | Magnum Producing, LP only | Allen Dome (10,800) | Brazoria | 1 | 212K | 3.96M | Jun 2015 – Dec 2021 |
| Roca-Negra G-3-227186 | White Oak Operating Company LLC only | Pegasus Gulf Coast (Big Gas Sd.) | Brazoria | 1 | 212K | 3.28M | Jun 2007 – Mar 2013 |
| Old Ocean Unit G-3-48883 | Hilcorp Energy Company only | Old Ocean (Larsen) | Brazoria | 1 | 211K | 10.6M | Jan 1993 – Apr 2026 |
| Plummer O-3-23181 | Atlas Operating LLC only | Chocolate Bayou | Brazoria | 1 | 204K | 215K | Jan 1997 – Mar 2026 |
| Holland, John G. O-3-7078 | 19TH Hole Production, LLC only | Danbury, North (7900) | Brazoria | 1 | 196K | 45 | Jan 1993 – Apr 2026 |
| IP Farms "PG" O-3-22879 | Kiawah Resources, LLC only | Pegasus Gulf Coast (Alibel) | Brazoria | 1 | 194K | 1.03M | Aug 1995 – Jul 2009 |
| Colby, E.H. et Al O-3-18825 | Denbury Onshore, LLC only | Manvel (Oligocene) | Brazoria | 1 | 194K | 423K | Jan 1993 – Aug 2025 |
| Miller, Wm. J., Estate O-3-5616 | Denbury Onshore, LLC only | Hastings, East | Brazoria | 3 | 193K | 362K | Jan 1993 – Apr 2026 |
| Belcher B57 Unit O-3-23589 | Denbury Onshore, LLC only | Manvel (Oligocene, Frio D) | Brazoria | 1 | 191K | 131K | Aug 1998 – May 2010 |
| Finger O-3-15173 | STS Petroleum LLC only | Pleasant Bayou (Finger SD) | Brazoria | 1 | 191K | 179K | Jan 1993 – Apr 2026 |
| Roberts G-3-187473 | Noble Energy Inc only | Iowa Colony (9700 Vicksburg) | Brazoria | 1 | 190K | 3.74M | Dec 2001 – Apr 2006 |
| Old Ocean Unit G-3-201523 | Hilcorp Energy Company only | Old Ocean (Larsen) | Brazoria | 1 | 187K | 9.45M | Mar 2004 – Jan 2024 |
| Old Ocean Unit G-3-31353 | Hilcorp Energy Company only | Old Ocean (Larsen) | Brazoria | 1 | 186K | 12.6M | Jan 1993 – Apr 2026 |
| Old Ocean Unit O-3-23849 | Hilcorp Energy Company only | Old Ocean (F-24) | Brazoria | 3 | 183K | 510K | May 2000 – Apr 2026 |
| Kidd, Margaret O-3-5615 | Denbury Onshore, LLC only | Hastings, East | Brazoria | 8 | 179K | 269K | Jan 1993 – Apr 2026 |
| Way, H. J. -B- O-3-2935 | Denbury Onshore, LLC only | Manvel (Miocene) | Brazoria | 3 | 179K | 506K | Jan 1993 – Nov 2025 |
| Old Ocean Unit G-3-175016 | Hilcorp Energy Company only | Old Ocean (Larsen) | Brazoria | 1 | 176K | 9.46M | Oct 1999 – Apr 2026 |
| State Lease 21 G-3-289174 | Cimarron Engineering, LLC only | Pegasus Gulf Coast (Big Gas Sd.) | Brazoria | 1 | 172K | 2.35M | Feb 2020 – Sep 2024 |
| Corbett O-3-9874 | McGowan Working Partners, Inc. only | Bonney (Frio Upper) | Brazoria | 2 | 172K | 59.8K | Jan 1993 – Apr 2026 |
| Old Ocean Unit G-3-42778 | Hilcorp Energy Company only | Old Ocean (Larsen) | Brazoria | 1 | 167K | 9.91M | Jan 1993 – Apr 2026 |
| Schenck G-3-158354 | XOG Resources, LLC only | Chocolate Bayou (12,000-S) | Brazoria | 1 | 166K | 3.81M | Jan 1996 – Oct 1998 |
| Reese, J. T. O-3-6476 | Yordes Energy, LLC only | Allen Dome | Brazoria | 9 | 164K | 0 | Jun 2000 – Feb 2026 |
| Belcher, W. T. -A- O-3-2926 | Denbury Onshore, LLC only | Manvel (Miocene) | Brazoria | 11 | 164K | 491K | Jan 1993 – Nov 2025 |
| Arco O-3-18037 | Boling Production Company, Inc. only | Damon Mound | Brazoria | 2 | 163K | 21 | Jan 1993 – Sep 2017 |
| Bernand Unit O-3-662 | Atlas Operating LLC only | Chocolate Bayou ( Frio Upper) | Brazoria | 2 | 163K | 167K | Jan 1993 – Mar 2026 |
| Way, H. J., -A- O-3-9174 | Denbury Onshore, LLC only | Manvel (4970) | Brazoria | 1 | 162K | 658K | Jan 1993 – Nov 2025 |
| Wieting, A. M. G-3-138865 | Texaco E & P Inc. only | Chocolate Bayou (Andrau Stray) | Brazoria | 1 | 162K | 1.11M | Jan 1993 – Nov 1995 |
| Sneed, Gilbert O-3-5619 | Denbury Onshore, LLC only | Hastings, East | Brazoria | 8 | 159K | 187K | Feb 2006 – Apr 2026 |
| Wieting, A. M. Gas Unit G-3-235493 | Dune Operating Company only | Chocolate Bayou (Andrau) | Brazoria | 1 | 153K | 1.46M | Feb 2008 – Sep 2009 |
| Hemus-Braden Unit O-3-22412 | Gcows Operating LLC only | Chenango (9100) | Brazoria | 2 | 153K | 45K | May 1994 – Apr 2026 |
| Belcher, W. T. -A- O-3-10796 | Denbury Onshore, LLC only | Manvel (FB-III, Oligocene Seg A) | Brazoria | 7 | 153K | 299K | Jan 1993 – Oct 2021 |
| Wieting, A. M. O-3-10697 | White Marlin Operating Co, LLC only | Chocolate Bayou (9020) | Brazoria | 5 | 152K | 60.4K | Jan 1993 – Apr 2026 |
| Reese O-3-21932 | Goldking Minerals Mgmt, L.L.C. only | Alvin, North (7900) | Brazoria | 1 | 150K | 137K | Feb 1993 – Jun 1997 |
| Dawson, L. C. O-3-10398 | Denbury Onshore, LLC only | Manvel (F.B. II, Oligocene) | Brazoria | 2 | 150K | 690K | Jan 1993 – Nov 2025 |
| Edgar R. Maxey G-3-283463 | Llox, L.L.C. only | Algoa, South (Upper Vicksburg) | Brazoria | 1 | 148K | 4.98M | Jul 2017 – Jan 2023 |