| Alexander -A- O-1-9457 | Austin Operating, LLC. only | Fentress (1750) | Caldwell | 5 | 2.52K | 42 | by Jan 1993 – Nov 1998 |
| Alexander, M.M. "A" G-4-75015 | Hilcorp Energy Company only | Laredo (Lobo) | Webb | 1 | 2.44K | 1.31M | by Jan 1993 – Aug 2026 |
| Charles Alexander B G-4-167946 | Columbus Energy, LLC only | Hubberd (Lobo) | Webb | 1 | 2.44K | 1.43M | Mar 1998 – Mar 2015 |
| Alexander O-14-6976 | Oklahoma EA II, L.L.C. only | Washita Creek, West (Douglas) | Hemphill | 1 | 2.39K | 28.1K | Jun 1994 – Jun 1998 |
| Alexander G-4-171762 | EOG Resources, Inc. only | Alejandrenas (7400) | Zapata | 1 | 2.36K | 1.18M | Jul 1998 – Jun 2005 |
| Alexander 48 O-14-8399 | Apache Corporation only | Hemphill (Douglas) | Hemphill | 1 | 2.36K | 15.3K | Aug 2010 – Apr 2014 |
| Alexander, R. J. G-13-130450 | Mitchell Energy Corporation only | Boonsville (Bend Congl., Gas) | Wise | 1 | 2.35K | 127K | by Jan 1993 – Oct 1998 |
| Alexander O-13-19603 | Case Oil only | Wichita County Regular | Wichita | 1 | 2.35K | 27 | by Jan 1993 – Nov 1998 |
| Alexander, J. W. G-6-118758 | Rockcliff Energy Operating LLC only | Bethany, East (Cotton Valley) | Panola | 1 | 2.33K | 591K | by Jan 1993 – Nov 2009 |
| Alexander, Maureen G-4-204131 | Mountain V Texas, LLC only | Urebeno, South (Lobo Cons.) | Zapata | 1 | 2.32K | 613K | Aug 2004 – Dec 2025 |
| Killam-Hurd-Amoco Alexander G/U G-4-122909 | Amoco Production Company only | Del Mar (Clark) | Webb | 1 | 2.28K | 95.2K | by Jan 1993 – May 1996 |
| Alexander Gas Unit 1 G-2-255054 | Falcon Production LLC only | Speary (Edwards) | Karnes | 1 | 2.24K | 295K | Jul 2009 – Aug 2014 |
| Koonce Gas Unit G-3-214666 | Mountain V Texas, LLC only | Bob Alexander (Massive Wilcox) | Wharton | 1 | 2.21K | 2.31M | Oct 2005 – Jul 2026 |
| Born, Alex "E" G-14-145382 | Complete Oil & Gas Services, LLC only | Lipscomb (Cleveland) | Lipscomb | 1 | 2.21K | 516K | Apr 1993 – Jun 2017 |
| Alexander, Toni G-5-183634 | Linn Operating, Inc. only | Personville, N (CV Consolidated) | Limestone | 1 | 2.21K | 520K | Jun 2001 – Jul 2016 |
| Born, Alex "F" G-14-157414 | BP America Production Company only | Lipscomb (Douglas) | Lipscomb | 1 | 2.17K | 390K | Jan 1996 – Mar 1999 |
| Born, Alex "E" G-14-201549 | Latigo Petroleum, LLC only | Lipscomb (Cleveland) | Lipscomb | 1 | 2.13K | 653K | Feb 2004 – Aug 2026 |
| Koonce Gas Unit G-3-216466 | Mountain V Texas, LLC only | Bob Alexander (Massive Wilcox) | Wharton | 1 | 2.13K | 251K | Mar 2006 – Jul 2026 |
| Alexander, E.C. -E- O-1-12020 | Triple C Oil Inc. only | Bateman (Austin Chalk) | Bastrop | 1 | 2.12K | 17 | Apr 1993 – May 2005 |
| Alexander, J. W. G-6-197738 | Rockcliff Energy Operating LLC only | Carthage, North (Cotton Valley) | Panola | 1 | 2.12K | 161K | Aug 2003 – Jun 2012 |
| Alexander, W. R. G-13-262278 | BKV Barnett, LLC only | Newark, East (Barnett Shale) | Wise | 1 | 2.12K | 1.07M | Feb 2011 – Aug 2026 |
| Alexander, Charles G-4-163712 | Columbus Energy, LLC only | Bashara-Hereford (7300) | Webb | 1 | 2.1K | 238K | Mar 1997 – Sep 2010 |
| Alexander O-9-11805 | Parker & Parsley Development L.P only | Spraberry (Trend Area) | Reagan | 1 | 2.08K | 11.2K | by Jan 1993 – Sep 1994 |
| Alexander "D" O-11-68881 | Occidental Permian Ltd. only | Prentice (San Andres) | Yoakum | 1 | 2.08K | 0 | Jun 2006 – Jul 2007 |
| Alexander, Charles D. G-4-61280 | Columbus Energy, LLC only | Laredo (Lobo) | Webb | 1 | 2.06K | 324K | by Jan 1993 – Nov 2006 |
| Alexander, Charles G-4-192599 | Columbus Energy, LLC only | Hubberd (Lobo) | Webb | 1 | 2.04K | 741K | Nov 2002 – Aug 2026 |
| Alexander G-2-217655 | C & E Operating, Inc. only | Lobue (Discorbis D) | Calhoun | 1 | 1.93K | 155K | Dec 2005 – Dec 2006 |
| Alexander, W. R. G-13-258969 | BKV Barnett, LLC only | Newark, East (Barnett Shale) | Wise | 1 | 1.89K | 651K | Feb 2011 – Aug 2026 |
| Alexander-Mandel G-4-257039 | Hilcorp Energy Company only | Roleta (Wilcox Consolidated) | Zapata | 1 | 1.85K | 1.85M | Apr 2010 – Aug 2026 |
| Alexander Ranch G-13-250386 | BKV Barnett II, LLC only | Newark, East (Barnett Shale) | Parker | 1 | 1.85K | 2.27M | Jan 2009 – Aug 2026 |
| Alexander, M. M. et al 709 G-1-167519 | Lewis Petro Properties, Inc. only | Tri Bar (Olmos) | La Salle | 1 | 1.82K | 181K | Oct 1997 – Aug 2026 |
| Born, Alex et Al G-14-202908 | Latigo Petroleum, LLC only | Lipscomb (Cleveland) | Lipscomb | 1 | 1.81K | 870K | Apr 2004 – Aug 2026 |
| Alexander, Geneva Furrh et Al G-6-213734 | Sheridan Production Co III, LLC only | Carthage (Travis Peak) | Panola | 1 | 1.8K | 75.7K | Jul 2005 – Aug 2011 |
| Alexander Heirs Gas Unit G-6-245830 | Sabine Energy Inc. only | Henderson, E. (Cotton Valley) | Rusk | 1 | 1.79K | 235K | Oct 2008 – Mar 2020 |
| Vela-Alexander Gas Unit G-4-154846 | Hilcorp Energy Company only | Bashara-Hereford (7300) | Zapata | 1 | 1.74K | 4.98M | Jun 1995 – Aug 2026 |
| Alexander G-6-222673 | Global Exploration, LLC only | Percy Wheeler (Travis Peak) | Cherokee | 1 | 1.72K | 86.5K | Sep 2006 – Feb 2026 |
| Alexander Heirs Gas Unit G-6-246026 | Sabine Energy Inc. only | Henderson, E. (Cotton Valley) | Rusk | 1 | 1.68K | 142K | Dec 2008 – May 2017 |
| Alexander Ranch G-13-250390 | BKV Barnett II, LLC only | Newark, East (Barnett Shale) | Parker | 1 | 1.68K | 2.11M | Jan 2009 – Aug 2026 |
| Ramey, Alex G-4-9732 | Remora Operating, LLC only | Cano-Mexico (6700) | Hidalgo | 1 | 1.65K | 442K | by Jan 1993 – Feb 2001 |
| Alexander, M. Trust G-4-163971 | Hilcorp Energy Company only | Exsun (Lobo Cons.) | Zapata | 1 | 1.64K | 3.69M | Mar 1997 – Aug 2026 |
| Alexander Ranch G-13-265713 | BKV Barnett II, LLC only | Newark, East (Barnett Shale) | Parker | 1 | 1.63K | 741K | Oct 2012 – Aug 2026 |
| Born, Alex -E- G-14-182382 | Complete Oil & Gas Services, LLC only | Lipscomb (Cleveland) | Lipscomb | 1 | 1.63K | 460K | Feb 2001 – Feb 2020 |
| Alexander Ranch G-13-265718 | BKV Barnett II, LLC only | Newark, East (Barnett Shale) | Parker | 1 | 1.63K | 1.13M | Oct 2012 – Aug 2026 |
| Alexander Ranch G-13-265725 | BKV Barnett II, LLC only | Newark, East (Barnett Shale) | Parker | 1 | 1.63K | 845K | Oct 2012 – Aug 2026 |
| Alexander Ranch G-13-265817 | BKV Barnett II, LLC only | Newark, East (Barnett Shale) | Parker | 1 | 1.63K | 962K | Oct 2012 – Aug 2026 |
| Alexander Ranch G-13-265712 | BKV Barnett II, LLC only | Newark, East (Barnett Shale) | Parker | 1 | 1.61K | 759K | Oct 2012 – Aug 2026 |
| Alexander, E.C. -F- O-1-12196 | Triple C Oil Inc. only | Bateman (Austin Chalk) | Bastrop | 1 | 1.56K | 17 | Apr 1993 – Oct 2005 |
| Koonce Gas Unit G-3-209048 | Mountain V Texas, LLC only | Bob Alexander (Massive Wilcox) | Wharton | 1 | 1.55K | 2.61M | Jan 2005 – Jul 2026 |
| Alexander, E.C. -D- O-1-12129 | Triple C Oil Inc. only | Bateman (Austin Chalk) | Bastrop | 1 | 1.55K | 29 | by Jan 1993 – Mar 2000 |
| Ramey, Alex G-4-150561 | Fina Oil & Chemical Company only | Cano-Mexico (5100) | Hidalgo | 1 | 1.51K | 251K | May 1994 – Sep 1996 |