| Armstrong, Charles M. G-4-83372 | Headington Oil Company, L.P. only | Candelaria (9600) | Kenedy | 1 | 0 | 0 | — |
| Yeager Armstrong G-4-84264 | Bright & Co. only | Albercas, N. (Jackson 1020) | Webb | 1 | 0 | 152K | by Jan 1993 – Jun 2002 |
| Armstrong, Charles M. G-4-86122 | Headington Oil Company, L.P. only | Candelaria (G-45) | Kenedy | 1 | 0 | 0 | — |
| Armstrong, Charles M G-4-86806 | Headington Oil Company, L.P. only | Candelaria (G-30) | Kenedy | 1 | 0 | 823K | Dec 1993 – Feb 1997 |
| Armstrong, Charles M. -Y- G-4-101017 | Exxon Mobil Corporation only | Candelaria (J-57, South) | Kenedy | 1 | 0 | 137K | by Jan 1993 – Aug 2001 |
| Armstrong, Charles M. G-4-101238 | Headington Oil Company LLC only | Candelaria (Consolidated) | Kenedy | 1 | 0 | 279K | by Jan 1993 – Sep 2011 |
| Armstrong, Charles M. G-4-105419 | Exxon Corp. only | Candelaria (I-90) | Kenedy | 1 | 0 | 22.5K | by Jan 1993 – Nov 1995 |
| Armstrong, Charles M. G-4-106399 | Exxon Mobil Corporation only | Candelaria (J-05) | Kenedy | 1 | 0 | 103K | by Jan 1993 – May 1997 |
| Armstrong, Charles M. G-4-108406 | Headington Oil Company, L.P. only | Candelaria (I-87) | Kenedy | 1 | 0 | 523K | by Jan 1993 – Feb 2002 |
| Armstrong, Charles M. G-4-117137 | Headington Oil Company, L.P. only | Candelaria (Consolidated) | Kenedy | 1 | 0 | 1.71M | Dec 1993 – Sep 2001 |
| Armstrong, Charles M. G-4-124986 | Headington Oil Company, L.P. only | Candelaria (G-30) | Kenedy | 1 | 0 | 0 | — |
| Armstrong, Charles M G-4-125675 | Headington Oil Company, L.P. only | Candelaria (G-71) | Kenedy | 1 | 0 | 0 | — |
| Armstrong, Charles M. G-4-127043 | Headington Oil Company, L.P. only | Candelaria (G-30) | Kenedy | 1 | 0 | 47.3K | by Jan 1993 – Oct 1995 |
| Armstrong, Charles M. G-4-130141 | Headington Oil Company, L.P. only | Candelaria (G-30) | Kenedy | 1 | 0 | 194K | by Jan 1993 – Dec 1995 |
| Armstrong, Charles M. G-4-131796 | Exxon Corp. only | Candelaria (G-30) | Kenedy | 1 | 0 | 304K | by Jan 1993 – Oct 1994 |
| Armstrong, Charles M. G-4-138124 | Headington Oil Company, L.P. only | Candelaria (G-30) | Kenedy | 1 | 0 | 0 | — |
| Armstrong, Charles M. G-4-140853 | Headington Oil Company, L.P. only | Candelaria (G-30) | Kenedy | 1 | 0 | 0 | — |
| Armstrong, Charles M. G-4-140854 | Headington Oil Company, L.P. only | Candelaria (G-30) | Kenedy | 1 | 0 | 51.9K | by Jan 1993 – Jun 1995 |
| Armstrong 258 G-4-154413 | Cox, Martin Regan only | Berry R. Cox (Wx. 7TH Hinnant) | Webb | 1 | 0 | 99.9K | Apr 1995 – Apr 1996 |
| Swallow Gas Unit G-4-158159 | Vastar Resources, Inc. only | Donna (Armstrong) | Hidalgo | 1 | 0 | 0 | — |
| Swallow Gas Unit G-4-161635 | Vastar Resources, Inc. only | Donna (Armstrong) | Hidalgo | 1 | 0 | 0 | — |
| Armstrong, Charles M. G-4-172604 | Exxon Mobil Corporation only | Candelaria (I-45) | Kenedy | 1 | 0 | 0 | — |
| Armstrong "258" G-4-172772 | Cox, Martin Regan only | Berry R. Cox (Wx. 6TH Hinnant) | Webb | 1 | 0 | 1.1K | Dec 2001 – Oct 2002 |
| Armstrong, Charles M. G-4-172971 | Headington Oil Company, L.P. only | Candelaria (G-17) | Kenedy | 1 | 0 | 0 | — |
| Armstrong, Charles M. G-4-173261 | Headington Oil Company, L.P. only | Candelaria (G-63) | Kenedy | 1 | 0 | 0 | — |
| Houston Gas Unit G-4-180797 | BP America Production Company only | Donna (Armstrong) | Hidalgo | 1 | 0 | 0 | — |
| Barnhart G-4-185101 | Republic Resources, LLC. only | Armstrong (Govt Wells, E.) | Jim Hogg | 1 | 0 | 1.84K | Oct 2001 – Oct 2001 |
| Stroman-Armstrong G-4-190556 | BP America Production Company only | Thompsonville, NE. (W-19) | Webb | 1 | 0 | 1.58K | Jul 2002 – Aug 2002 |
| Stroman-Armstrong G-4-190646 | BP America Production Company only | Thompsonville, NE. (13700) | Webb | 1 | 0 | 3.58K | Aug 2002 – Feb 2003 |
| Armstrong, Charles M. -Y- G-4-192111 | Headington Oil Company, L.P. only | Wildcat | Kenedy | 1 | 0 | 0 | — |
| Stroman-Armstrong G-4-194701 | BP America Production Company only | Thompsonville, NE. (12500) | Webb | 1 | 0 | 213 | Apr 2003 – Jun 2003 |
| Stroman-Armstrong G-4-197109 | BP America Production Company only | Thompsonville, NE. (10640) | Webb | 1 | 0 | 14.8K | Sep 2003 – Jul 2005 |
| Armstrong, Tobin G-4-202847 | Headington Oil Company, L.P. only | Candelaria (J-45) | Kenedy | 1 | 0 | 68.2K | May 2004 – May 2004 |
| Armstrong, Tobin G-4-202878 | Headington Oil Company, L.P. only | Candelaria (J-05) | Kenedy | 1 | 0 | 442K | Jun 2004 – Dec 2004 |
| Armstrong, Tobin G-4-202880 | Headington Oil Company, L.P. only | Candelaria (J-10) | Kenedy | 1 | 0 | 0 | — |
| Armstrong, Tobin G-4-202881 | Headington Oil Company, L.P. only | Candelaria(j-18-34) | Kenedy | 1 | 0 | 0 | — |
| Armstrong, Tobin G-4-204106 | Headington Oil Company, L.P. only | Candelaria (J-45) | Kenedy | 1 | 0 | 0 | — |
| Armstrong, Tobin G-4-206627 | Headington Oil Company LLC only | Candelaria (Consolidated) | Kenedy | 1 | 0 | 23.2K | Sep 2004 – Feb 2005 |
| Armstrong, Tobin G-4-208718 | Headington Energy Partners, LLC only | Candelaria (Consolidated) | Kenedy | 1 | 0 | 915K | Feb 2005 – May 2014 |
| Armstrong, Tobin G-4-221462 | Headington Oil Company LLC only | Candelaria (Consolidated) | Kenedy | 1 | 0 | 89.5K | Jun 2006 – Nov 2006 |
| Armstrong G-4-234833 | Greeheyco, Inc. only | Wildcat | Kenedy | 1 | 0 | 0 | — |
| Armstrong Ranch 'A' G-4-236536 | Cox, Martin Regan only | Berry R. Cox (Wx. 3RD Hinnant) | Webb | 1 | 0 | 20.7K | Dec 2007 – Feb 2008 |
| Buchanan Gas Unit G-4-236945 | Wagner Oil Company only | Donna (Armstrong) | Hidalgo | 1 | 0 | 50 | Jun 2007 – Oct 2007 |
| ARMSTRONG"258" G-4-251467 | Lgdc Corporation only | Aviators, South (11800) | Webb | 1 | 0 | 0 | — |
| Armstrong G-4-251659 | Hughes, Dan A. Company, L.P. only | Wildcat | Zapata | 1 | 0 | 0 | — |
| Tobin Armstrong 7X G-4-254825 | Greeheyco, Inc. only | Candelaria (Consolidated) | Kenedy | 1 | 0 | 0 | — |
| Grubenman, Effie Mae Leslie G-6-16708 | Strong Stripper Oil Rec Sys, LLC only | Shiloh, East (Blossom) | Panola | 1 | 0 | 0 | — |
| Shaw Gas Unit G-6-86575 | Stronghold Ventures LLC only | Carthage (Cotton Valley) | Panola | 1 | 0 | 0 | — |
| Strong, Lonnie G-6-130586 | Buffco Production Inc. only | Penn-Griffith (Travis Peak, Up.) | Rusk | 1 | 0 | 0 | — |
| Armstrong, Theodore G-6-186955 | Harleton Oil & Gas Inc. only | Bethany (Paluxy) | Panola | 1 | 0 | 0 | — |