| Lamb Unit A G-2-268978 | Burlington Resources O & G Co LP only | De Witt (Eagle Ford Shale) | De Witt | 1 | 46.8K | 560K | Aug 2013 – Dec 2019 |
| Lambshead C-9 G-8-208953 | Petex only | Big Buffalo (Caddo) | Throckmorton | 1 | 18.7K | 272K | Apr 2005 – Aug 2026 |
| Lambert Gas Unit G-2-234183 | Hilcorp Energy Company only | Tom Oconnor (7930) | Refugio | 1 | 18.2K | 887K | Jan 2008 – Feb 2009 |
| Lambert, M. F. G-2-144497 | Devon Energy Production Co, L.P. only | Siene Bean (6960) | Refugio | 1 | 16.9K | 1.15M | by Jan 1993 – Oct 1996 |
| Lambert, Charlie "A" G-13-248703 | BKV Barnett, LLC only | Newark, East (Barnett Shale) | Wise | 1 | 15.9K | 2.55M | Oct 2008 – Aug 2026 |
| D. Lambert G-2-249472 | Field Petroleum Corp. only | Koenig, North (Wilcox Migura) | De Witt | 1 | 12.4K | 705K | Sep 2008 – Apr 2019 |
| Lambert, Charlie "A" G-13-248686 | BKV Barnett, LLC only | Newark, East (Barnett Shale) | Wise | 1 | 10.9K | 2.55M | Oct 2008 – Aug 2026 |
| Lambert Gas Unit G-2-249215 | Hilcorp Energy Company only | Tom O' Connor (7800) | Refugio | 1 | 10.7K | 486K | Mar 2009 – Aug 2009 |
| Lambert Gas Unit G-2-234216 | Hilcorp Energy Company only | Tom Oconnor (7930) | Refugio | 1 | 10K | 484K | Feb 2008 – Oct 2008 |
| Critz G-4-181746 | P-R-O Management, Inc. only | Agua Dulce, N. (Lamb Sand) | Nueces | 1 | 8.55K | 608K | Dec 2000 – Nov 2003 |
| Lambert, Charlie "A" G-13-244121 | BKV Barnett, LLC only | Newark, East (Barnett Shale) | Wise | 1 | 8.19K | 1.47M | Sep 2008 – Aug 2026 |
| Lambert, Charlie "A" G-13-246402 | BKV Barnett, LLC only | Newark, East (Barnett Shale) | Wise | 1 | 7.24K | 1.17M | Oct 2008 – Aug 2026 |
| Lambert, M. F. G-2-84415 | Hilcorp Energy Company only | Tom Oconnor | Refugio | 1 | 7.11K | 577K | by Jan 1993 – May 2010 |
| Lambert Gas Unit G-2-255564 | Hilcorp Energy Company only | Tom O'Connor (South 7700) | Refugio | 1 | 5.94K | 381K | Sep 2009 – Jan 2010 |
| Lambert, M. F. G-2-178401 | Devon Energy Production Co, L.P. only | Tom Oconnor (7940) | Refugio | 1 | 5.87K | 35.1K | Apr 2000 – Jul 2000 |
| Lambert, M.F. G-2-90036 | H & D Operating Company only | Tom Oconnor | Refugio | 1 | 5.45K | 1.15M | by Jan 1993 – Oct 2004 |
| Lambert Gas Unit G-2-242628 | Hilcorp Energy Company only | Tom O'Connor (7700) | Refugio | 1 | 4.97K | 188K | Oct 2008 – Jan 2009 |
| Lamb G-14-187271 | High River Res Operating, LLC only | Lips (Cleveland) | Hutchinson | 1 | 3.78K | 381K | Jan 2002 – Mar 2026 |
| Lambert, M. F. G-2-145259 | Pennzoil Exploration & Prod. Co. only | Siene Bean (6300) | Refugio | 1 | 3.23K | 241K | Apr 1993 – Jul 1994 |
| Lambshead D-10 Unit G-8-150348 | Throckmorton Oil, Inc. only | Watt's Spanish Gourd (Miss.) | Throckmorton | 1 | 2.85K | 5.31K | Mar 1994 – Jul 1994 |
| Lambert G-6-122680 | TGNR Gulf Coast LLC only | Oak Hill (Cotton Valley) | Rusk | 1 | 2.82K | 833K | by Jan 1993 – Aug 2026 |
| Lambshead Ranch 1088 G-8-283940 | TC Oil and Gas, LLC only | Taylor Hill, S. (Miss) | Throckmorton | 1 | 2.68K | 1.93K | Aug 2019 – Apr 2020 |
| Lambert, Charlie "A" G-13-186467 | BKV Barnett, LLC only | Newark, East (Barnett Shale) | Wise | 1 | 2.58K | 316K | Sep 2001 – Mar 2011 |
| Herrmann-Liska Unit G-4-280320 | Britanco, L.L.C. only | Agua Dulce (Lamb) | Nueces | 1 | 2.21K | 207K | Aug 2012 – Mar 2023 |
| Lambshead C-10 G-8-265301 | Petex only | Big Buffalo (Caddo) | Throckmorton | 1 | 1.77K | 56.9K | Dec 2011 – Feb 2022 |
| M. F. Lambert G-2-255911 | Hilcorp Energy Company only | Tom O'Connor (8000, West) | Refugio | 1 | 1.68K | 12.5K | Feb 2010 – Jan 2011 |
| Lambert Gas Unit G-2-274195 | Hilcorp Energy Company only | Tom Oconnor (7930) | Refugio | 1 | 1.62K | 92.5K | Mar 2014 – Dec 2019 |
| Lambert G-6-212336 | TGNR Gulf Coast LLC only | Oak Hill (Cotton Valley) | Rusk | 1 | 1.47K | 388K | Apr 2005 – Mar 2018 |
| Lambshead E-5 G-8-149632 | Throckmorton Oil, Inc. only | Open a & Lazy V (Miss.) | Throckmorton | 1 | 1.33K | 13.6K | May 1994 – Dec 1994 |
| Lambshead B-10 G-8-142187 | Throckmorton Oil, Inc. only | Big Buffalo (Mississippian) | Throckmorton | 1 | 1.31K | 229K | by Jan 1993 – Nov 1997 |
| Lambert, M. F. G-2-159376 | Hilcorp Energy Company only | Refugio-Fox (5500) | Refugio | 1 | 1.25K | 474K | Jun 1996 – Jul 2004 |
| Prochaska G-4-208709 | Republic Resources, LLC. only | Agua Dulce (Lamb) | Nueces | 1 | 1.18K | 85.8K | Feb 2005 – Jun 2006 |
| Lambert, M. F. G-2-36882 | Hilcorp Energy Company only | Tom Oconnor (4950) | Refugio | 1 | 878 | 991K | by Jan 1993 – Feb 2022 |
| Lambert, M. F. G-2-83736 | Devon Energy Production Co, L.P. only | Tom Oconnor | Refugio | 1 | 807 | 185K | by Jan 1993 – Dec 1994 |
| Lambshead C-10 G-8-153918 | Throckmorton Oil, Inc. only | Big Buffalo (Caddo) | Throckmorton | 1 | 645 | 75.1K | Feb 1995 – Sep 1996 |
| Lambert, Charlie G-13-28718 | BKV Barnett, LLC only | Boonsville (Bend Congl., Gas) | Wise | 1 | 628 | 290K | by Jan 1993 – Aug 2016 |
| Hill-Lambert GU G-5-160596 | Atlas Operating LLC only | Marsters, N.E. | Freestone | 1 | 617 | 713K | Sep 1996 – Jun 2026 |
| Lambshead B-8 G-8-152297 | Petex only | Big Buffalo (Caddo) | Throckmorton | 1 | 587 | 596K | Dec 1994 – Aug 2026 |
| Lambert, M. F. G-2-144500 | Pennzoil Exploration & Prod. Co. only | Siene Bean (6500) | Refugio | 1 | 539 | 1.02K | by Jan 1993 – Mar 1993 |
| Lambert G-6-229528 | Sabine Energy Inc. only | Hardwood (Cotton Valley) | Harrison | 1 | 531 | 148K | May 2007 – Aug 2026 |
| Lambert, M. F. G-2-83972 | Pennzoil Exploration & Prod. Co. only | Refugio-Fox (5000) | Refugio | 1 | 463 | 155K | by Jan 1993 – Dec 1994 |
| Lambshead A-3 G-8-155843 | Throckmorton Oil, Inc. only | Antelope Hills (Caddo, Upper) | Shackelford | 1 | 460 | 11.5K | Oct 1995 – Jun 1997 |
| Lambert Gas Unit G-2-267700 | Hilcorp Energy Company only | Tom Oconnor (7930) | Refugio | 1 | 372 | 22.9K | May 2012 – Sep 2012 |
| Lambert "A" G-5-177765 | Corsa Resources, LLC only | Dew (C.V. Consolidated) | Freestone | 1 | 329 | 210K | Apr 2000 – Feb 2026 |
| Lambert, M. F. G-2-151991 | Pennzoil Exploration & Prod. Co. only | Refugio-Fox (5830) | Refugio | 1 | 306 | 50.7K | Oct 1994 – Mar 1995 |
| Lambert G-6-229145 | Sabine Oil & Gas Corporation only | Hardwood (Cotton Valley) | Harrison | 1 | 277 | 64.5K | Apr 2007 – Jun 2013 |
| Mary F. Lambert "EA" G-2-254174 | Hilcorp Energy Company only | Tom O'Connor (5350 Sand) | Refugio | 1 | 214 | 46.1K | Oct 2009 – Apr 2015 |
| Lambert, Charlie G-13-99444 | Devon Energy Production Co, L.P. only | Boonsville (Bend Congl., Gas) | Wise | 1 | 202 | 177K | by Jan 1993 – Apr 2011 |
| Lambert, M.F. G-2-162261 | Devon Energy Production Co, L.P. only | Siene Bean (5150) | Refugio | 1 | 189 | 201K | Dec 1996 – Mar 1999 |
| Lambert, M. F. G-2-146091 | Hilcorp Energy Company only | Refugio-Fox (2600) | Refugio | 1 | 178 | 659K | Jul 1993 – Nov 1999 |