| Armstrong G-14-282790 | Unbridled Resources, LLC only | Stiles Ranch (Granite Wash Cons) | Wheeler | 1 | 26K | 1.26M | Dec 2016 – Aug 2026 |
| Old Ocean Unit G-3-136880 | Hilcorp Energy Company only | Old Ocean (Armstrong) | Brazoria | 1 | 25.3K | 4.43M | by Jan 1993 – Aug 2026 |
| Armstrong, Elizabeth -A- O-10-34677 | Coda Energy, Inc. only | Andrews (Wolfcamp-Penn.) | Andrews | 4 | 25K | 53.9K | Oct 1995 – Jun 1996 |
| Armstrong, Elizabeth O-10-26176 | Coda Energy, Inc. only | Andrews, North (Strawn) | Andrews | 1 | 24.5K | 6.82K | by Jan 1993 – Jul 1996 |
| Armstrong G-14-218380 | Complete Oil & Gas Services, LLC only | Stiles Ranch (Granite Wash Cons) | Wheeler | 1 | 24.3K | 1.1M | Apr 2006 – Mar 2023 |
| Armstrong, C. M. O-4-7553 | Headington Oil Company, L.P. only | Candelaria (I-60 Sand) | Kenedy | 2 | 22.5K | 60.8K | by Jan 1993 – Dec 2001 |
| Armstrong G-14-276813 | Unbridled Resources, LLC only | Stiles Ranch (Granite Wash Cons) | Wheeler | 1 | 22.1K | 1.35M | Jul 2014 – Jul 2025 |
| Armstrong O-10-38884 | Ring Energy, Inc. only | Means | Andrews | 1 | 21.7K | 0 | Aug 2008 – Jun 2019 |
| Strong Gas Unit G-2-190858 | Transpacific Energy, LLC only | Bego (Consolidated) | Goliad | 1 | 21.5K | 2.42M | Feb 2002 – Aug 2026 |
| Armstrong G-14-286875 | Unbridled Resources, LLC only | Stiles Ranch (Granite Wash Cons) | Wheeler | 1 | 20.8K | 1.37M | Jul 2017 – Aug 2026 |
| Armstrong-Arnim Unit O-3-23151 | McA Petroleum Corporation only | Elm Grove (Arnim -A-) | Fayette | 1 | 20.6K | 0 | Jan 1997 – Aug 2026 |
| Old Ocean Unit G-3-136851 | Hilcorp Energy Company only | Old Ocean (Armstrong) | Brazoria | 1 | 20.4K | 1.47M | by Jan 1993 – Apr 2003 |
| Old Ocean Unit G-3-157759 | Hilcorp Energy Company only | Old Ocean (Armstrong) | Brazoria | 1 | 19.5K | 1.92M | Jul 1995 – Dec 2007 |
| Armstrong G-14-217303 | Complete Oil & Gas Services, LLC only | Stiles Ranch (Granite Wash Cons) | Wheeler | 1 | 19.5K | 1.03M | Oct 2005 – Mar 2023 |
| Old Ocean Unit G-3-170146 | Hilcorp Energy Company only | Old Ocean (Armstrong) | Brazoria | 1 | 19.5K | 4.23M | Aug 1998 – Aug 2003 |
| Armstrong O-10-33643 | Moore, David & Associates, Inc. only | Shafter Lake (San Andres) | Andrews | 1 | 18.9K | 96 | by Jan 1993 – Jul 2008 |
| Old Ocean Unit G-3-235088 | Hilcorp Energy Company only | Old Ocean (Armstrong) | Brazoria | 1 | 18.6K | 1.16M | Mar 2008 – Aug 2026 |
| Armstrong G-14-229819 | Zephyr Lone Star Oper Co.,l.l.c. only | Stiles Ranch (Granite Wash Cons) | Wheeler | 1 | 18.5K | 845K | Jul 2007 – Jan 2018 |
| Strong Gas Unit G-2-169126 | Transpacific Energy, LLC only | Bego (Consolidated) | Goliad | 1 | 18.1K | 5.11M | Oct 1997 – Aug 2026 |
| Armstrong, Elizabeth a/C 3 O-10-12571 | Coda Energy, Inc. only | Andrews (Pennsylvanian) | Andrews | 5 | 17.9K | 22.9K | by Jan 1993 – Sep 1995 |
| Armstrong O-14-43 | O. H. M. Operating only | Panhandle Carson County Field | Carson | 1 | 17.4K | 45K | by Jan 1993 – May 2015 |
| Armstrong O-10-21035 | Redco Oil & Gas, Inc. only | Block a-34 (Seven Rivers) | Andrews | 1 | 17.2K | 1.21K | by Jan 1993 – Aug 2026 |
| Knight-Strong Gas Unit G-6-141468 | Samson Lone Star, LLC only | Carthage, SE (CV) | Panola | 1 | 17.1K | 1.04M | by Jan 1993 – Aug 2014 |
| Old Ocean Unit G-3-158667 | Hilcorp Energy Company only | Old Ocean (Armstrong) | Brazoria | 1 | 15.7K | 1.42M | May 1995 – Apr 2008 |
| Armstrong G-14-210628 | Complete Oil & Gas Services, LLC only | Stiles Ranch (Granite Wash Cons) | Wheeler | 1 | 15.5K | 823K | Mar 2005 – Mar 2023 |
| Armstrong-Green O-10-7215 | Q Natural Resources, LLC only | Ward, South | Ward | 4 | 14.9K | 122 | by Jan 1993 – Dec 2023 |
| Armstrong-Armstrong Unit O-3-24548 | Magnolia Oil & Gas Operating LLC only | Giddings (Austin Chalk-3) | Fayette | 1 | 14.5K | 191K | Jan 2004 – Aug 2026 |
| Armstrong, Roy O-8-26581 | Quest Emg, Inc. only | Brown County Regular | Brown | 13 | 14.5K | 21 | by Jan 1993 – Dec 2010 |
| Armstrong,gwendolyn O-13-18124 | Great American Resources Inc. only | Clay County Regular | Clay | 4 | 14.3K | 150 | by Jan 1993 – Aug 2026 |
| Old Ocean Unit G-3-137150 | Hilcorp Energy Company only | Old Ocean (Armstrong) | Brazoria | 1 | 14.2K | 1.99M | by Jan 1993 – Apr 1998 |
| Old Ocean Unit G-3-158180 | Hilcorp Energy Company only | Old Ocean (Armstrong) | Brazoria | 1 | 14.1K | 592K | Jul 1995 – Jan 2000 |
| Rice Gas Unit G-4-98902 | Remora Operating, LLC only | Donna (Armstrong) | Hidalgo | 1 | 13.8K | 1.12M | Oct 2004 – Aug 2026 |
| Stroman, D. C. O-4-157 | Calstar Energy Consultants, LLC only | Armstrong | Jim Hogg | 6 | 13.7K | 124 | May 1993 – Oct 2009 |
| Armstrong O-10-25870 | Redco Oil & Gas, Inc. only | Block a-34 (Yates) | Andrews | 1 | 13.6K | 39 | by Jan 1993 – Aug 2026 |
| Armstrong, A. F. O-8-125 | Scranton Exploration only | Brown County Regular | Brown | 6 | 13.4K | 20 | by Jan 1993 – Jul 2026 |
| Old Ocean Unit G-3-239810 | Hilcorp Energy Company only | Old Ocean (Armstrong) | Brazoria | 1 | 13K | 416K | Jul 2008 – Jan 2020 |
| Armstrong G-14-227393 | Zephyr Lone Star Oper Co.,l.l.c. only | Stiles Ranch (Granite Wash Cons) | Wheeler | 1 | 12.9K | 681K | Dec 2006 – Apr 2019 |
| Strong, Cora E. -B- O-6-2460 | Tower Resources Inc only | Slocum, NW (Woodbine Up. FB 1) | Anderson | 1 | 12.9K | 24 | by Jan 1993 – Oct 2019 |
| Armstrong, Tobin G-4-208657 | Headington Energy Partners, LLC only | Candelaria (Consolidated) | Kenedy | 1 | 12.4K | 1.62M | May 2004 – Apr 2024 |
| Armstrong O-13-22544 | Primexx Operating Corporation only | Deer Creek (Israel 5000) | Clay | 2 | 12.3K | 37.7K | by Jan 1993 – May 2010 |
| Strong Memorial Park O-6-5109 | HD Operating Co, LLC only | Slocum | Anderson | 1 | 12.2K | 55 | by Jan 1993 – Jun 2026 |
| Armstrong OL G-3-157683 | Magnolia Oil & Gas Operating LLC only | Giddings (Austin Chalk-3) | Grimes | 1 | 12.1K | 4.79M | Feb 1996 – Jun 2003 |
| Armstrong G-14-238239 | Zephyr Lone Star Oper Co.,l.l.c. only | Stiles Ranch (Granite Wash Cons) | Wheeler | 1 | 12K | 604K | Nov 2007 – Dec 2016 |
| Armstrong Banker O-8-30647 | Goopco, Inc. only | Oinks (Mississippian Lime) | Throckmorton | 1 | 11.6K | 0 | Jan 2011 – Sep 2013 |
| Old Ocean Unit G-3-152176 | Hilcorp Energy Company only | Old Ocean (Armstrong) | Brazoria | 1 | 11.3K | 1.22M | May 1995 – Jan 2004 |
| D.W. Armstrong O-8-30839 | Ram Oil and Gas, Inc. only | Oinks (Mississippian Lime) | Throckmorton | 1 | 11.1K | 0 | Sep 2011 – Aug 2026 |
| Armstrong, Tobin O-4-14172 | Headington Energy Partners, LLC only | Candelaria (Consolidated) | Kenedy | 2 | 10.6K | 24K | Aug 2021 – Aug 2026 |
| Armstrong O-8-9476 | Gaylyn, Inc. only | Isett (Caddo) | Eastland | 1 | 10.4K | 76K | by Jan 1993 – Mar 2014 |
| Old Ocean Unit G-3-134505 | Hilcorp Energy Company only | Old Ocean (Armstrong) | Brazoria | 1 | 9.98K | 226K | by Jan 1993 – Aug 2023 |
| Armstrong G-14-120289 | Formation Resour Field Svcs, LLC only | Stiles Ranch (Granite Wash Cons) | Wheeler | 1 | 9.67K | 549K | by Jan 1993 – Oct 2022 |