| McFaddin Trust O-3-702 | Gepard Energy Inc only | Clam Lake | Jefferson | 41 | 1.84M | 762K | Jan 1993 – Jul 2026 |
| Sunset Unit O-3-26108 | Hilcorp Energy Company only | Sunset (Frio 8230) | Jefferson | 2 | 1.08M | 602K | Oct 2012 – Jul 2026 |
| McFaddin O-3-24865 | Square Mile Energy, L.L.C. only | Big Hill Bayou (H-4) | Jefferson | 1 | 807K | 2.01M | Apr 2006 – Nov 2018 |
| Blauw-Paetz O-3-9024 | Shoco Production LLC only | Stowell (Sullivan LF) | Jefferson | 2 | 723K | 551K | Jan 1993 – Jul 2026 |
| Thomas, E., Mrs. et Al O-3-10454 | Hilcorp Energy Company only | Fannett | Jefferson | 3 | 642K | 1.13M | Jan 1993 – Jul 2026 |
| McDermond, F. O-3-12200 | Hilcorp Energy Company only | Nome SE. (Frio, UP) | Jefferson | 2 | 636K | 151K | Jan 1993 – Jul 2026 |
| State Tract 30 Unit O-3-25092 | Davis Petroleum Corp. only | Pleasure Island (H-1 Hackberry) | Jefferson | 4 | 616K | 1.65M | Nov 2007 – Jul 2026 |
| McFaddin State O-3-701 | Gepard Energy Inc only | Clam Lake | Jefferson | 7 | 603K | 284K | Jan 1993 – Jul 2026 |
| Gladys City O-3-3959 | Kingwood Exploration LLC only | Spindletop | Jefferson | 15 | 600K | 60.1K | Jan 1993 – Jul 2026 |
| Gladys City O-3-3963 | Rheaco Oil Company, Ltd. only | Spindletop | Jefferson | 103 | 596K | 21 | Jan 1993 – Jul 2026 |
| Attridge O-3-9023 | Shoco Production LLC only | Stowell (Sullivan LF) | Jefferson | 3 | 498K | 618K | Jan 1993 – Jul 2026 |
| McFaddin, W.P.H. O-3-3960 | Kingwood Exploration LLC only | Spindletop | Jefferson | 18 | 496K | 46.5K | Jan 1993 – Jul 2026 |
| Broussard Trust O-3-26066 | Hilcorp Energy Company only | Pond Gully (Frio 8110) | Jefferson | 1 | 451K | 240K | Sep 2012 – Jul 2026 |
| Thomas, E., et Al O-3-20896 | Hilcorp Energy Company only | Fannett | Jefferson | 27 | 447K | 795K | Jan 1993 – Jul 2026 |
| Sonny V O-3-26652 | Olipdp II, LLC only | Port Acres (Marg-Frio Cons.) | Jefferson | 2 | 445K | 515K | May 2014 – Jul 2026 |
| Koch, T.K. O-3-19423 | Texcal Energy (GP) LLC only | Winnie, S.E. (Hutcheson) | Jefferson | 2 | 407K | 328K | Jan 1993 – Mar 2008 |
| McFaddin Ranch O-3-10421 | Kingwood Exploration LLC only | McFaddin Ranch (Miocene -Q- West | Jefferson | 4 | 388K | 71.5K | Jan 1993 – May 2022 |
| Sherron, Elenor et Al O-3-24849 | Allied-Gulf Energy, LLC only | Ineeda (Hackberry) | Jefferson | 1 | 356K | 116K | Apr 2006 – Jul 2026 |
| MMK O-3-26396 | Olipdp II, LLC only | Port Acres (Marg-Frio Cons.) | Jefferson | 1 | 345K | 280K | May 2013 – Jul 2026 |
| Sherron, Eleanor Etal O-3-23760 | Allied-Gulf Energy, LLC only | Ineeda (Nodosaria B) | Jefferson | 1 | 323K | 538K | Jul 1999 – May 2025 |
| Wilson Jr. High Unit O-3-24194 | Noble Energy Inc only | Nederland (Frio 2) | Jefferson | 1 | 309K | 368K | Mar 2002 – May 2007 |
| Clark O-3-11431 | Rheaco Oil Company, Ltd. only | Spindletop | Jefferson | 25 | 280K | 21 | Jan 1993 – Jul 2026 |
| Keith & Dowlen O-3-303 | Hilcorp Energy Company only | Beaumont, West | Jefferson | 16 | 279K | 464K | Jan 1993 – May 2004 |
| Bordages, P., Est. O-3-1501 | Hilcorp Energy Company only | Fannett | Jefferson | 6 | 276K | 696K | Jan 1993 – Jul 2026 |
| Casey Mineral Trust O-3-24729 | Serco Operating LLC only | Little Engine (Nod. Blanpedi) | Jefferson | 1 | 270K | 87.8K | May 2005 – Jul 2026 |
| Clubb, J. T. O-3-23692 | Allied-Gulf Energy, LLC only | Ineeda (Hackberry) | Jefferson | 1 | 268K | 1.37M | Mar 1999 – Jul 2026 |
| Clubb, G. D. O-3-24871 | Square Mile Energy, L.L.C. only | Train (Hackberry) | Jefferson | 1 | 266K | 117K | Jun 2006 – Oct 2012 |
| E. Pleasant et al Unit O-3-20825 | Milestone Operating, Inc. only | Lovells Lake (Frio 2) | Jefferson | 1 | 265K | 307K | Jan 1993 – Jul 2026 |
| Exxon Fee O-3-21281 | Texcal Energy (GP) LLC only | Winnie, S.E. (Hutcheson) | Jefferson | 1 | 254K | 259K | Jan 1993 – Feb 2007 |
| Jefferson Land Co. a/C #1 O-3-9043 | Milestone Operating, Inc. only | Lovells Lake (Marg. 2) | Jefferson | 11 | 254K | 322K | Jan 1993 – Jul 2026 |
| Spalding, Oakley C. O-3-19316 | White Marlin Operating Co, LLC only | La Belle (6500) | Jefferson | 1 | 253K | 123K | Jan 1993 – Jul 2026 |
| Walter Co. Unit O-3-24724 | Serco Operating LLC only | Green Gully (Nod Blanpedi) | Jefferson | 1 | 252K | 176K | Apr 2005 – Jul 2026 |
| Jefferson Land Company O-3-9052 | Milestone Operating, Inc. only | Lovells Lake (Frio 2) | Jefferson | 6 | 236K | 380K | Jan 1993 – Jul 2026 |
| Sabco Folts O-3-25866 | White Marlin Operating Co, LLC only | La Belle (8600) | Jefferson | 1 | 228K | 651K | Sep 2011 – Jul 2026 |
| Catfish O-3-25151 | Square Mile Energy, L.L.C. only | La Belle, SW (6500) | Jefferson | 1 | 227K | 243K | Jan 2007 – Apr 2017 |
| Glady's City Oil Og&m Co O-3-24811 | Kingwood Exploration LLC only | Spindletop | Jefferson | 12 | 219K | 39.4K | Dec 2005 – Jul 2026 |
| Wingate, Pansy Etal O-3-23695 | Lgdc Corporation only | Ineeda (Hackberry) | Jefferson | 1 | 217K | 1.48M | Jul 1999 – Aug 2007 |
| Hankamer O-3-22034 | S & S Operating Company, Inc. only | Stowell, South (Smith -A-) | Jefferson | 1 | 216K | 35.4K | Feb 1993 – Jul 2026 |
| Craigen-Hebert Unit O-3-25344 | Rutherford Oil Corporation only | Taylor Bayou, East (8700) | Jefferson | 1 | 209K | 115K | Dec 2008 – May 2016 |
| Doornbos O-3-24942 | Hughes Oil Operating, LLC only | Port Acres (Marg-Frio Cons.) | Jefferson | 4 | 207K | 194K | Jan 2007 – Jul 2026 |
| Fitzhugh "A" O-3-17645 | Unit Petroleum Company only | Big Hill | Jefferson | 3 | 205K | 33 | Jan 1993 – Sep 2018 |
| Davis O-3-18649 | 19TH Hole Production, LLC only | Stowell, S. (Crawford, L.) | Jefferson | 1 | 204K | 149K | Jan 1993 – Jul 2026 |
| Junker-Spencer Etal -a- Tr. -B- O-3-1507 | Hilcorp Energy Company only | Fannett | Jefferson | 10 | 201K | 118K | Jan 1993 – Nov 2016 |
| Craigen, Leo -A- O-3-1504 | Hilcorp Energy Company only | Fannett | Jefferson | 5 | 196K | 113K | Jan 1993 – Jul 2026 |
| Pogo Fee O-3-17935 | Karbuhn Oil Company only | Hebert (H-3) | Jefferson | 1 | 191K | 3.11M | Jan 1993 – Mar 2020 |
| Clubb et al Unit O-3-24647 | Square Mile Energy, L.L.C. only | Boots (Nodosaria Blanpiedi) | Jefferson | 1 | 187K | 747K | Nov 2004 – Apr 2009 |
| B. Deaton Estate et Al O-3-25532 | S & S Operating Company, Inc. only | Big Hill, SW (Nodosaria, BLK B) | Jefferson | 2 | 164K | 188K | Jan 2010 – Jul 2026 |
| HI 22-L (TX S/L M-95936) O-3-24147 | Devon Energy Production Co, L.P. only | High Island Blk. 23-L (8800) | Jefferson | 1 | 164K | 66.1K | Apr 2001 – May 2007 |
| Pleasant, Ed, et UX O-3-21441 | Milestone Operating, Inc. only | Lovells Lake (Frio 2) | Jefferson | 2 | 154K | 267K | Jan 1993 – Jul 2026 |
| Broussard & Hebert O-3-23269 | White Marlin Operating Co, LLC only | La Belle (7250) | Jefferson | 1 | 153K | 137K | Jun 1997 – Jul 2026 |