| Dooley, H.H. #6 G-8-80497 | Foag, Inc. only | Strong, SW (Congl "A") | Stephens | 1 | 468 | 685K | by Jan 1993 – Aug 2019 |
| Dooley, C. G-8-103206 | Kramer Operating, LLC only | Strong, SW (Congl. D) | Stephens | 1 | 468 | 587K | by Jan 1993 – Aug 2026 |
| Strong, C.W. Gas Unit G-6-211409 | Proline Energy Resources Inc only | Beckville (Cotton Valley) | Rusk | 1 | 451 | 248K | May 2005 – Aug 2026 |
| Armstrong Ranch G-4-168660 | Dallas Production, Inc. only | Frank Pitts (J-37) | Kenedy | 1 | 443 | 111K | Jun 1998 – Sep 1998 |
| Armstrong, Tobin "S" G-4-234516 | Headington Energy Partners, LLC only | Candelaria (Consolidated) | Kenedy | 1 | 412 | 1.62M | Dec 2007 – Aug 2026 |
| Dooley, C. G-8-117997 | Kramer Operating, LLC only | Strong, SW (Congl. D) | Stephens | 1 | 412 | 828K | by Jan 1993 – Aug 2026 |
| Strong, C.W. Gas Unit G-6-222322 | Proline Energy Resources Inc only | Beckville (Cotton Valley) | Rusk | 1 | 402 | 244K | Aug 2006 – Aug 2026 |
| Tippen, G. R. G-11-116601 | Trek Resources, Inc. only | Armstrong (Atoka Congl.) | Cottle | 1 | 398 | 151K | by Jan 1993 – Aug 1997 |
| Armstrong O-13-30123 | Carter Energy Corporation only | Boonsville (Bend Congl., Gas) | Jack | 1 | 378 | 17 | Oct 2001 – Feb 2003 |
| Armstrong G-13-165566 | Carter Energy Corporation only | Boonsville (Bend Congl., Gas) | Jack | 1 | 350 | 10.3K | Sep 1997 – Jan 1999 |
| Armstrong O-6-16016 | Elms Oil Company only | Percy Wheeler (Travis Peak) | Cherokee | 1 | 339 | 0 | Jan 2024 – Jun 2026 |
| Armstrong G-8-181617 | DMV Pipeline LLC only | Desdemona, E. (Marble Falls) | Erath | 1 | 337 | 110K | Jan 2001 – Jun 2019 |
| Old Ocean Unit G-3-134202 | Hilcorp Energy Company only | Old Ocean (Armstrong) | Brazoria | 1 | 293 | 837K | by Jan 1993 – Jul 1996 |
| Old Ocean Unit G-3-300330 | Hilcorp Energy Company only | Old Ocean (Armstrong) | Brazoria | 1 | 277 | 20.7K | Jul 2025 – Aug 2026 |
| Stroman-Armstrong G-4-228834 | Hugoton Operating Company, Inc. only | Thompsonville, NE. (12500) | Webb | 1 | 271 | 4.78M | Jun 2007 – Jan 2025 |
| Old Ocean Unit G-3-235567 | Hilcorp Energy Company only | Old Ocean (Armstrong) | Brazoria | 1 | 269 | 10.8K | May 2008 – Oct 2008 |
| Armstrong -A- O-1-11308 | Great Plains Resources, Inc. only | Somerset | Bexar | 2 | 267 | 14 | by Jan 1993 – Oct 1995 |
| Lea, P.J. et Al O-10-47262 | Stronghold Energy II Oper, LLC only | Lea, South (Wolfcamp) | Crane | 2 | 215 | 21 | Sep 2015 – Jan 2016 |
| Old Ocean Unit G-3-180736 | Hilcorp Energy Company only | Old Ocean (Armstrong) | Brazoria | 1 | 212 | 68.5K | Oct 2000 – May 2005 |
| Armstrong -B- O-1-11312 | Great Plains Resources, Inc. only | Somerset | Bexar | 3 | 191 | 21 | Feb 1993 – Oct 1995 |
| Ballard Strong G-13-242718 | Marathon Oil Company only | Newark, East (Barnett Shale) | Erath | 1 | 174 | 23.5K | Sep 2007 – Jul 2008 |
| Old Ocean Unit G-3-125504 | Hilcorp Energy Company only | Old Ocean (Armstrong) | Brazoria | 1 | 171 | 219K | by Jan 1993 – Mar 1995 |
| Armstrong Ranch G-4-153315 | Cox, Martin Regan only | Berry R. Cox (Wx. 7TH Hinnant) | Webb | 1 | 167 | 402K | Aug 1994 – Mar 2004 |
| Robinette, J. C. G-4-52230 | Nadcf Recovery Group, Inc. only | Donna (Armstrong) | Hidalgo | 1 | 122 | 187K | by Jan 1993 – Nov 2011 |
| Robinette, J. C. G-4-190827 | Momentum Production Corp. only | Donna (Armstrong) | Hidalgo | 1 | 122 | 26.5K | Oct 1998 – Nov 2002 |
| Armstrong, Arthur Jr. O-1-7945 | Ginco Operating Co. only | Somerset | Bexar | 2 | 121 | 13 | by Jan 1993 – Oct 1995 |
| Armstrong -B- I O-1-11313 | Great Plains Resources, Inc. only | Somerset | Bexar | 2 | 93 | 19 | Feb 1993 – Oct 1995 |
| Strong Gas Unit G-2-170018 | Cody Energy LLC only | Bego (Consolidated) | Goliad | 1 | 83 | 304K | Jun 1998 – Jun 2002 |
| Swallow Gas Unit G-4-154576 | Wagner Oil Company only | Donna (Armstrong) | Hidalgo | 1 | 80 | 422K | Jun 1995 – Aug 2026 |
| Armstrong No. 4 O-13-24261 | Carter Energy Corporation only | Dearing (Caddo) | Jack | 1 | 77 | 18.2K | by Jan 1993 – Jul 1993 |
| Armstrong Heirs O-13-24512 | Oakmont Oil and Gas only | Lost Horizons (Miss.) | Jack | 2 | 74 | 6.81K | by Jan 1993 – Oct 1994 |
| Armstrong, James G-13-245388 | Formentera Operations LLC only | Newark, East (Barnett Shale) | Johnson | 1 | 69 | 1.38M | Nov 2008 – Aug 2025 |
| Stringer East G-8-211858 | Cholla Petroleum, Inc. only | Strong (Congl.) | Palo Pinto | 1 | 63 | 131K | Aug 2005 – Sep 2008 |
| Stroman-Armstrong G-4-233964 | Hugoton Operating Company, Inc. only | Thompsonville, NE. (12500) | Webb | 1 | 61 | 919K | Nov 2007 – Feb 2025 |
| Armstrong, Tobin "B" G-4-203505 | Headington Energy Partners, LLC only | Candelaria (Consolidated) | Kenedy | 1 | 59 | 1.19M | May 2004 – Sep 2017 |
| Old Ocean Unit G-3-98245 | Amoco Production Company only | Old Ocean (Armstrong) | Brazoria | 1 | 49 | 24.4K | by Jan 1993 – Sep 1993 |
| Old Ocean Unit G-3-136877 | Hilcorp Energy Company only | Old Ocean (Armstrong) | Brazoria | 1 | 48 | 109K | by Jan 1993 – Sep 1993 |
| Armstrong, James G-13-244088 | Javelin Energy Partners Mgmt LLC only | Newark, East (Barnett Shale) | Johnson | 1 | 44 | 3.29M | Oct 2008 – Jul 2025 |
| Old Ocean Unit G-3-7605 | Hilcorp Energy Company only | Old Ocean (Armstrong) | Brazoria | 1 | 43 | 200K | by Jan 1993 – Sep 1994 |
| Stroman-Armstrong G-4-196853 | Columbus Energy, LLC only | Thompsonville, NE. (12500) | Webb | 1 | 43 | 474K | Aug 2003 – Aug 2026 |
| Dooley G-8-141955 | Kramer Operating, LLC only | Strong, SW (Congl. D) | Stephens | 1 | 43 | 44.6K | by Jan 1993 – Aug 2026 |
| Old Ocean Unit G-3-108054 | Hilcorp Energy Company only | Old Ocean (Armstrong) | Brazoria | 1 | 42 | 19K | by Jan 1993 – Jun 1994 |
| Old Ocean Unit G-3-289521 | Hilcorp Energy Company only | Old Ocean (Armstrong) | Brazoria | 1 | 36 | 1.82K | May 2020 – Jul 2026 |
| Gragg G-8-216251 | Wayop, LLC only | Strong (Congl.) | Palo Pinto | 1 | 36 | 60.4K | Apr 2006 – Jan 2016 |
| Armstrong O-13-26583 | Carter Energy Corporation only | Boonsville (Consolidated Congl.) | Jack | 1 | 31 | 267 | Feb 1994 – May 1994 |
| Gragg, W. A., -A- G-8-18399 | Wayop, LLC only | Strong (Congl.) | Palo Pinto | 1 | 31 | 48.4K | by Jan 1993 – Oct 2024 |
| Armstrong State G-10-233022 | Hailstone Resources, LLC only | Pamela (Silurian) | Reeves | 1 | 31 | 2.93M | Oct 2006 – Aug 2025 |
| Armstrong, Charles M. (Area X) O-4-12034 | Exxon Corp. only | Candelaria (H-56) | Kenedy | 1 | 28 | 25 | Sep 1993 – Dec 1993 |
| Armstrong, Charles M. O-4-10526 | Headington Oil Company, L.P. only | Candelaria (7740) | Kenedy | 2 | 24 | 51 | Jul 1993 – Jul 1993 |
| Old Ocean Unit G-3-133863 | Hilcorp Energy Company only | Old Ocean (Armstrong) | Brazoria | 1 | 22 | 215K | by Jan 1993 – Oct 1994 |