| Windham "108" G-9-205285 | EOG Resources, Inc. only | Amacker-Tippett (Devonian) | Upton | 1 | 190K | 4.11M | Jun 2003 – Apr 2026 |
| Windham A G-2-260385 | Warwick-Artemis, LLC only | Sugarkane (Eagle Ford) | Bee | 1 | 146K | 3.4M | Dec 2010 – Mar 2024 |
| Windham 108 G-9-193431 | EOG Resources, Inc. only | Amacker-Tippett (Devonian) | Upton | 1 | 127K | 4.11M | Jan 2003 – Apr 2026 |
| Windham 103 G-9-199526 | EOG Resources, Inc. only | Amacker-Tippett (Devonian) | Upton | 1 | 96.1K | 3.15M | Sep 2003 – Apr 2026 |
| Windham A G-2-298173 | Warwick-Artemis, LLC only | Sugarkane (Eagle Ford) | Bee | 1 | 86.9K | 2.26M | Jul 2024 – Apr 2026 |
| Windham-Clark 103 Unit G-9-214430 | Southwest Royalties, Inc. only | Amacker-Tippett (Devonian) | Upton | 1 | 83.4K | 1.13M | Feb 2005 – Mar 2026 |
| Windham, R. S. 118 G-9-226024 | XTO Energy Inc. only | Wilshire (Consolidated) | Upton | 1 | 77K | 1.66M | Dec 2006 – Apr 2026 |
| Windham 103 G-9-205835 | EOG Resources, Inc. only | Amacker-Tippett (Devonian) | Upton | 1 | 73.9K | 1.44M | May 2004 – Apr 2026 |
| R S Windham "A" G-9-207528 | EOG Resources, Inc. only | Amacker-Tippett (Devonian) | Upton | 1 | 72.3K | 2.13M | Jul 2004 – Apr 2026 |
| Windham 16 G-9-191632 | EOG Resources, Inc. only | Amacker-Tippett (Devonian) | Upton | 1 | 66.8K | 1.18M | Jul 2002 – Apr 2026 |
| Windham A G-2-298175 | Warwick-Artemis, LLC only | Sugarkane (Eagle Ford) | Bee | 1 | 64.4K | 2.35M | Jul 2024 – Apr 2026 |
| Windham A G-2-298174 | Warwick-Artemis, LLC only | Sugarkane (Eagle Ford) | Bee | 1 | 57.1K | 1.89M | Jul 2024 – Apr 2026 |
| Windham A G-2-298178 | Warwick-Artemis, LLC only | Sugarkane (Eagle Ford) | Bee | 1 | 55K | 2.27M | Jul 2024 – Apr 2026 |
| Windham, R.S. G-9-240773 | XTO Energy Inc. only | Wilshire (Consolidated) | Upton | 1 | 47K | 667K | Apr 2008 – Mar 2022 |
| "SV" Windham G-10-156160 | Endeavor Energy Resources L.P. only | Parks, S. (Bend, Lower) | Midland | 1 | 32.4K | 2.04M | Sep 1995 – Mar 2016 |
| Windham, R. S. "101" G-9-234211 | Apache Corporation only | Wilshire (Consolidated) | Upton | 1 | 31.9K | 771K | Mar 2002 – Jul 2024 |
| Windham, R.S. "C" G-9-210678 | Southwest Royalties, Inc. only | Amacker-Tippett (Devonian) | Upton | 1 | 27.9K | 598K | Apr 2005 – Apr 2026 |
| Windham, R. S. G-9-18647 | XTO Energy Inc. only | Amacker-Tippett (Devonian) | Upton | 1 | 26.6K | 3.09M | Jan 1993 – Mar 2023 |
| Windham, R. S. G-9-19386 | Apache Corporation only | Wilshire (Consolidated) | Upton | 1 | 26.1K | 2.96M | Jan 1993 – Apr 2026 |
| Windham, R.S. "101" G-9-192603 | Apache Corporation only | Wilshire (Consolidated) | Upton | 1 | 25K | 782K | Jul 2002 – Oct 2014 |
| Windham, R. S. "A" G-9-170457 | EOG Resources, Inc. only | Amacker-Tippett (Devonian) | Upton | 1 | 24.9K | 1.5M | Jul 1998 – Jan 2018 |
| Windham, R. S. et al 118 G-9-234113 | Apache Corporation only | Wilshire (Consolidated) | Upton | 1 | 23.5K | 803K | Jun 2002 – Apr 2026 |
| Windham, Elizabeth G-9-18649 | Southwest Royalties, Inc. only | Amacker-Tippett (Devonian) | Upton | 1 | 23.5K | 2.76M | Jan 1993 – Aug 2020 |
| Windham, R. S. et al 118 G-9-165339 | Apache Corporation only | Wilshire (Consolidated) | Upton | 1 | 22.4K | 1.57M | Jul 1997 – Apr 2026 |
| Windham, R. S. "A" G-9-134832 | EOG Resources, Inc. only | Amacker-Tippett (Devonian) | Upton | 1 | 22.1K | 4.61M | Jan 1993 – Apr 2026 |
| Windham, Elizabeth G-9-150764 | Southwest Royalties, Inc. only | Amacker-Tippett (Devonian) | Upton | 1 | 21K | 1.72M | Aug 1994 – Feb 2026 |
| Windham, RS -B- a/C 2 G-9-207981 | Southwest Royalties, Inc. only | Amacker-Tippett (Devonian) | Upton | 1 | 19.1K | 485K | Jan 2005 – Apr 2025 |
| Windham, R. S. et al 118 G-9-234201 | Apache Corporation only | Wilshire (Consolidated) | Upton | 1 | 19K | 1.25M | Oct 2001 – Apr 2026 |
| Windham, R. S. et al 118 G-9-41564 | Apache Corporation only | Wilshire (Consolidated) | Upton | 1 | 18.7K | 1.13M | Jan 1993 – Apr 2026 |
| Windham, R. S. et al 128 G-9-41495 | Apache Corporation only | Wilshire (Consolidated) | Upton | 1 | 18.7K | 2.8M | Jan 1993 – Apr 2026 |
| Windham, R. S. "A" G-9-161093 | EOG Resources, Inc. only | Amacker-Tippett (Devonian) | Upton | 1 | 17.1K | 1.31M | Sep 1996 – Jul 2019 |
| Windham, R. S. "A" G-9-163463 | EOG Resources, Inc. only | Amacker-Tippett (Devonian) | Upton | 1 | 16.8K | 1.27M | Jun 1997 – May 2025 |
| Windham, R.S. G-9-36200 | Apache Corporation only | Wilshire (Consolidated) | Upton | 1 | 15.9K | 2.74M | Jan 1993 – Apr 2026 |
| Windham, R. S. G-9-178372 | Apache Corporation only | Wilshire (Consolidated) | Upton | 1 | 15.7K | 2.89M | Jul 2000 – Apr 2026 |
| Windham, R.S. "101" G-9-195797 | Apache Corporation only | Wilshire (Consolidated) | Upton | 1 | 14.3K | 618K | Jun 2003 – Apr 2026 |
| Windham, R. S. 128A G-9-234208 | Apache Corporation only | Wilshire (Consolidated) | Upton | 1 | 13.2K | 110K | Mar 2005 – Apr 2015 |
| Windham, R. S. G-9-42052 | Southwest Royalties, Inc. only | Wilshire (Consolidated) | Upton | 1 | 12.3K | 924K | Jan 1993 – Apr 2026 |
| Windham, R. S. G-9-163024 | Apache Corporation only | Wilshire (Consolidated) | Upton | 1 | 11.5K | 1.44M | May 1997 – May 2008 |
| Windham, R. S. G-9-148148 | XTO Energy Inc. only | Wilshire (Pennsylvanian) | Upton | 1 | 11.1K | 1.7M | Oct 1993 – Sep 2024 |
| Windham, R. S. G-9-208390 | XTO Energy Inc. only | Barnet-Amacker (Fusselman) | Upton | 1 | 10.6K | 1.05M | Feb 2004 – Jul 2022 |
| Windham, R. S. -B- a/C 2 G-9-18651 | Southwest Royalties, Inc. only | Amacker-Tippett (Devonian) | Upton | 1 | 10.6K | 751K | Jan 1993 – Jan 2025 |
| Windham, Elizabeth G-9-198185 | Southwest Royalties, Inc. only | Amacker-Tippett (Devonian) | Upton | 1 | 10K | 1.62M | Jul 2003 – May 2025 |
| Windham, R. S. G-9-36198 | XTO Energy Inc. only | Wilshire (Consolidated) | Upton | 1 | 9.94K | 701K | Jan 1993 – Apr 2004 |
| Windham, Elizabeth a/C 3 G-9-194185 | Southwest Royalties, Inc. only | Amacker-Tippett (Devonian) | Upton | 1 | 9.12K | 1.31M | Mar 2003 – Mar 2026 |
| Windham, R. S. et al 128 G-9-210724 | Apache Corporation only | Wilshire (Consolidated) | Upton | 1 | 8.29K | 1.21M | Apr 2005 – Apr 2026 |
| Windham, R. S. G-9-203046 | Apache Corporation only | Wilshire (Consolidated) | Upton | 1 | 7.33K | 743K | Mar 2004 – May 2017 |
| Windham, R. S. G-9-181191 | Summit Petroleum LLC only | Jack Herbert (Strawn Penn.) | Upton | 1 | 6.74K | 404K | Dec 2000 – May 2021 |
| Windham, R. S. et al 2 G-9-245479 | V-F Petroleum Inc. only | Jack Herbert (Strawn Penn.) | Upton | 1 | 6.68K | 561K | Apr 2007 – Apr 2026 |
| Windham, R. S. G-9-174635 | XTO Energy Inc. only | Amacker-Tippett (Devonian) | Upton | 1 | 6.23K | 968K | Jul 1999 – Apr 2009 |
| Windham, R. S. G-9-91800 | XTO Energy Inc. only | Wilshire (Consolidated) | Upton | 1 | 5.28K | 328K | Jan 1993 – Dec 2023 |