| Armstrong Unit B O-2-9758 | Burlington Resources O & G Co LP only | Eagleville (Eagle Ford-2) | Karnes | 5 | 1.44M | 3.76M | Oct 2011 – Apr 2026 |
| Armstrong Unit A O-2-9736 | Burlington Resources O & G Co LP only | Eagleville (Eagle Ford-2) | Karnes | 4 | 1.2M | 3.09M | Aug 2011 – Apr 2026 |
| State Armstrong 9-4 Unit O-10-52567 | Blue Arrow Operating, LLC only | Hoefs T-K (Wolfcamp) | Reeves | 7 | 1.09M | 1.27M | Jun 2019 – Apr 2026 |
| Vest Ranch O-10-19740 | Stronghold Energy II Oper, LLC only | Arenoso (Strawn Detritus) | Winkler | 21 | 815K | 4.67M | Jan 1993 – May 2019 |
| Armstrong Horizontal Unit O-1-18812 | EOG Resources, Inc. only | Eagleville (Eagle Ford-1) | McMullen | 4 | 798K | 409K | Oct 2015 – Apr 2026 |
| Armstrong, Elizabeth M., et Al O-10-18912 | Citation Oil & Gas Corp. only | Block a-34 (Glorieta) | Andrews | 2 | 555K | 29K | Jan 1993 – Apr 2026 |
| Armstrong, Annie "B" O-11-66157 | Apache Corporation only | Emerald (Silurian) | Yoakum | 1 | 510K | 11K | Jan 1993 – Jan 2009 |
| Buscha-Armstrong Unit O-3-21964 | Magnolia Oil & Gas Operating LLC only | Giddings (Austin Chalk-3) | Fayette | 2 | 497K | 3.85M | Feb 1993 – Apr 2026 |
| Armstrong-Munson Unit O-3-21511 | Magnolia Oil & Gas Operating LLC only | Giddings (Austin Chalk-3) | Fayette | 1 | 492K | 3.69M | Jan 1993 – Oct 2023 |
| Strong Fundamental A G-10-287083 | Permian Resources Operating, LLC only | Phantom (Wolfcamp) | Reeves | 1 | 472K | 3.5M | Mar 2019 – Apr 2026 |
| Armstrong "48" O-10-35272 | Apache Corporation only | Spraberry (Trend Area) | Midland | 10 | 467K | 818K | Mar 1997 – Apr 2020 |
| Armstrong, Elizabeth O-10-8521 | Shinnery Oil Company, Inc. only | Shafter Lake (San Andres) | Andrews | 9 | 361K | 293K | Jan 1993 – Apr 2026 |
| Armstrong Unit O-5-3552 | Sage Energy Company only | Ici (Georgetown) | Robertson | 1 | 353K | 55.8K | May 1997 – Jun 2000 |
| Schulz-Armstrong Unit O-3-21865 | Magnolia Oil & Gas Operating LLC only | Giddings (Austin Chalk-3) | Fayette | 1 | 342K | 2.35M | Jan 1993 – Apr 2026 |
| Armstrong 149 O-10-46892 | Primexx Operating Corporation only | Wolfbone (Trend Area) | Reeves | 2 | 341K | 497K | Feb 2015 – May 2021 |
| Armstrong Gas Unit G-3-110517 | Perdido Energy, LLC only | Peveto (9600) | Orange | 1 | 297K | 6.94M | Jan 1993 – Jan 2024 |
| Armstrong 36 O-10-43442 | Diamondback E&P LLC only | Spraberry (Trend Area) | Midland | 4 | 292K | 964K | May 2012 – Apr 2026 |
| Armstrong State 4 O-10-46543 | Blue Arrow Operating, LLC only | Hoefs T-K (Wolfcamp) | Reeves | 1 | 282K | 382K | Dec 2014 – Apr 2026 |
| Armstrong "12" O-10-39527 | Petroplex Energy Inc. only | Spraberry (Trend Area) | Martin | 2 | 281K | 800K | May 2009 – Apr 2026 |
| Armstrong, Annie O-11-65765 | XTO Energy Inc. only | Wasson 72 | Yoakum | 2 | 271K | 104K | Jul 1993 – Jul 2023 |
| LW Armstrong O-3-26824 | Wildfire Energy Operating LLC only | Madisonville, W. (Woodbine -A-) | Robertson | 1 | 267K | 62.9K | May 2015 – Mar 2026 |
| State Armstrong 9-4 B O-10-56242 | Blue Arrow Operating, LLC only | Hoefs T-K (Wolfcamp) | Reeves | 1 | 247K | 371K | May 2020 – Apr 2026 |
| Armstrong Unit #2H O-5-3583 | Sage Energy Company only | Ici (Georgetown) | Robertson | 1 | 244K | 52.6K | Jul 1997 – Sep 2006 |
| Armstrong, Elizabeth O-10-9945 | Hilcorp Energy Company only | Means, South (Wolfcamp) | Andrews | 7 | 244K | 247K | Jan 1993 – Apr 2026 |
| State Armstrong 9-4 A O-10-56174 | Blue Arrow Operating, LLC only | Hoefs T-K (Wolfcamp) | Reeves | 1 | 240K | 302K | May 2020 – Apr 2026 |
| Armstrong, Elizabeth -D- O-10-30022 | Hilcorp Energy Company only | Means, South (Wolfcamp) | Andrews | 3 | 235K | 254K | Jan 1993 – Apr 2026 |
| State Armstrong 9-4 D O-10-60285 | Blue Arrow Operating, LLC only | Hoefs T-K (Wolfcamp) | Reeves | 1 | 209K | 424K | Aug 2020 – Apr 2026 |
| Yeager & Armstrong O-10-9527 | Crescent Energy Operating, LLC only | Fuhrman-Mascho | Andrews | 10 | 180K | 243K | Mar 1994 – Apr 2026 |
| Lea, P.J. et Al O-10-12887 | Stronghold Energy II Oper, LLC only | Lea, South (Clear Fork) | Crane | 10 | 179K | 318K | Jan 1993 – Jul 2020 |
| Armstrong, Elizabeth O-10-269 | Coda Energy, Inc. only | Andrews (Wolfcamp) | Andrews | 13 | 174K | 554K | Jan 1993 – Sep 1995 |
| Armstrong, Elizabeth M. et Al O-10-44924 | Citation Oil & Gas Corp. only | Block a-34 (San Andres) | Andrews | 3 | 174K | 58.5K | May 2014 – Apr 2026 |
| Armstrong State G-10-281705 | COG Operating LLC only | Ford, West (Wolfcamp) | Culberson | 1 | 161K | 3.07M | Nov 2016 – Apr 2026 |
| Armstrong-Armstrong Unit G-3-144580 | Hunt Petroleum Corporation only | Giddings (Austin Chalk, Gas) | Fayette | 1 | 161K | 1.9M | Feb 1993 – Jan 2004 |
| Armstrong G-14-273227 | Unbridled Resources, LLC only | Stiles Ranch (Granite Wash Cons) | Wheeler | 1 | 149K | 6.65M | Oct 2013 – Apr 2026 |
| Armstrong State G-10-278238 | COG Operating LLC only | Ford, West (Wolfcamp) | Culberson | 1 | 148K | 2.88M | May 2015 – Apr 2026 |
| Armstrong State G-10-278421 | COG Operating LLC only | Sandbar (Bone Spring) | Culberson | 1 | 146K | 1.03M | Apr 2013 – Mar 2025 |
| Armstrong, Elizabeth O-10-26431 | Extex Operating Company only | Shafter Lake (San Andres) | Andrews | 6 | 136K | 23.3K | Jan 1993 – Apr 2026 |
| Armstrong 12 O-10-43716 | Oxyrock Operating, LLC only | Spraberry (Trend Area) | Midland | 2 | 136K | 377K | Nov 2012 – Apr 2026 |
| Lea, P.J. et Al O-10-37433 | Stronghold Energy II Oper, LLC only | Lea, South (Fusselman) | Crane | 2 | 129K | 140K | Nov 2004 – Dec 2018 |
| Armstrong, Elizabeth -C- O-10-18408 | Hilcorp Energy Company only | Means | Andrews | 3 | 122K | 10.3K | Jan 1993 – Apr 2026 |
| Armstrong-TXL O-10-23721 | Q Natural Resources, LLC only | Ken Regan (Delaware) | Reeves | 3 | 122K | 123K | Jan 1993 – Apr 2026 |
| Armstrong, Elizabeth -D- O-10-27889 | Hilcorp Energy Company only | Means | Andrews | 2 | 121K | 16.7K | Jan 1993 – Apr 2026 |
| Armstrong, Elizabeth -D- O-10-8864 | Ring Energy, Inc. only | Shafter Lake (San Andres) | Andrews | 5 | 120K | 125K | Jan 1993 – Apr 2026 |
| Armstrong, T. M. O-7-6911 | Long Trusts, The only | East Texas | Gregg | 4 | 117K | 1.11K | Jan 1993 – Mar 2026 |
| Armstrong, Eliz. O-10-17908 | Reverence Operating LLC only | Parker (Grayburg, San Andres) | Andrews | 3 | 115K | 20 | Jan 1993 – Apr 2026 |
| Armstrong N State Unit G-10-276246 | COG Operating LLC only | Sandbar (Bone Spring) | Culberson | 1 | 109K | 739K | Feb 2014 – Mar 2025 |
| Armstrong, M.B. O-14-4411 | Lera only | Panhandle Hutchinson County Fld. | Hutchinson | 17 | 103K | 92K | Sep 1993 – Apr 2026 |
| Armstrong, Charles M. O-4-13273 | Headington Energy Partners, LLC only | Candelaria (Consolidated) | Kenedy | 3 | 94.3K | 673K | Jan 2005 – Jun 2024 |
| Armstrong, Elizabeth -C- O-10-29679 | Hilcorp Energy Company only | Means, South (Wolfcamp) | Andrews | 4 | 93.2K | 192K | Jan 1993 – Nov 2014 |
| Yeager & Armstrong Caruth FM O-10-38936 | Crescent Energy Operating, LLC only | Fuhrman-Mascho | Andrews | 4 | 91.5K | 173K | Aug 2008 – Apr 2026 |