| Falls City Unit O-2-5369 | Legend Natural Gas II, LP only | Falls City (Umoc) | Karnes | 2 | 32.2K | 977 | by Jan 1993 – Jul 2002 |
| Sanders, A.G.-a- No. 2 Unit O-13-29223 | Itx Corporation only | Barnett (Marble Falls, Oil) | Young | 1 | 32.2K | 200K | Sep 1996 – Aug 2026 |
| Sanders O-8-4000 | Stober Oil and Gas Services, LLC only | Crystal Falls (Miss.) | Stephens | 4 | 32K | 120K | Jun 2002 – Jun 2018 |
| Worthington O-13-33500 | FX Energy Operating, LLC only | KRS (Marble Falls) | Jack | 1 | 31.7K | 106K | Feb 2016 – Aug 2026 |
| Lindsey O-13-32554 | Oakridge Oil and Gas, LP only | KRS (Marble Falls) | Jack | 3 | 31.5K | 515K | May 2013 – Aug 2026 |
| Sewell O-13-32637 | Oakridge Oil and Gas, LP only | KRS (Marble Falls) | Jack | 5 | 31.4K | 714K | Apr 2013 – Aug 2026 |
| WB Owen O-13-31796 | Petrobal Omega 1, LLC only | KRS (Marble Falls) | Jack | 2 | 31.1K | 444K | Oct 2010 – Sep 2019 |
| Hurd O-13-32901 | FX Energy Operating, LLC only | KRS (Marble Falls) | Jack | 2 | 31K | 732K | Mar 2014 – Aug 2026 |
| Briscoe O-13-32925 | Rife Energy Operating, Inc. only | Antelope,s.e. (Marble Falls) | Jack | 4 | 30.9K | 467K | Sep 2013 – Aug 2026 |
| Stewart O-13-32082 | Pop Operating Company only | Markley, SE. (Marble Falls) | Young | 2 | 30.3K | 1.78K | Jun 2011 – Aug 2026 |
| Haag, Oliver O-13-32162 | Oakridge Oil and Gas, LP only | KRS (Marble Falls) | Jack | 3 | 30.3K | 731K | Jul 2011 – Sep 2018 |
| McKittrick-McConnell O-13-29006 | Cholla Petroleum, Inc. only | Weiler (Marble Falls) | Jack | 7 | 30K | 1.69M | Jul 1995 – Mar 2017 |
| Hickman, I.R. "B" O-8-13935 | JQL Energy, LLC only | Santa Anna, E. (Marble Falls) | Coleman | 3 | 29.5K | 5.41K | by Jan 1993 – May 2026 |
| Frances Wimberly O-13-32850 | Oakridge Oil and Gas, LP only | KRS (Marble Falls) | Jack | 4 | 29.5K | 1.13M | Jul 2013 – Aug 2026 |
| Prothro O-13-32656 | Oakridge Oil and Gas, LP only | KRS (Marble Falls) | Jack | 1 | 29.5K | 737K | Apr 2012 – May 2017 |
| Dawson-Conway 163 O-8-12586 | Snyder Drilling Corp. only | J-3, SE (Marble Falls) | Shackelford | 2 | 29.2K | 1.5K | by Jan 1993 – Aug 2026 |
| Fitzgerald McCarty O-13-32319 | Oakridge Oil and Gas, LP only | KRS (Marble Falls) | Jack | 2 | 28.9K | 164K | Aug 2012 – Aug 2026 |
| Coan O-8-20951 | Eastland Operating, L.L.C. only | Mittie (Marble Falls) | Comanche | 3 | 28.9K | 171K | by Jan 1993 – Jun 2023 |
| Barnett O-13-29289 | Itx Corporation only | Barnett (Marble Falls, Oil) | Young | 2 | 28.8K | 331K | Dec 1996 – Aug 2026 |
| Fox O-8-21354 | Eastland Operating, L.L.C. only | Cliff (Marble Falls) | Eastland | 1 | 28.6K | 336K | by Jan 1993 – Aug 2026 |
| Sharon Hyde O-13-32929 | Paratus Petroleum LLC only | KRS (Marble Falls) | Jack | 1 | 28.3K | 170K | Apr 2014 – Aug 2026 |
| Brown O-13-32172 | Eagleridge Operating, LLC only | KRS (Marble Falls) | Jack | 2 | 28.2K | 388K | Jan 2012 – Feb 2023 |
| Olinick, Jerome O-2-5355 | Devon Louisiana Corporation only | Falls City (Lma) | Karnes | 1 | 27.8K | 906 | Jun 1996 – Dec 2001 |
| McClure, Russell O-8-31182 | Bulwark Oil & Gas, LLC only | Burns-Dalton(marble Falls) | Palo Pinto | 2 | 27.7K | 989K | Feb 2013 – Jan 2025 |
| Crawford "B" O-8-25937 | Dodson Prairie Oil & Gas LLC only | Strawn, NW. (Marble Falls) | Palo Pinto | 1 | 27.4K | 400K | by Jan 1993 – Aug 2016 |
| East Avis O-13-33393 | G & F Oil, Inc. only | KRS (Marble Falls) | Jack | 1 | 27.3K | 89.1K | May 2015 – Jul 2026 |
| Falls, Minnie O-11-61306 | Walker Oil and Gas Ltd only | Sharon Ridge (Clear Fork) | Scurry | 4 | 27.2K | 21 | by Jan 1993 – Jul 2026 |
| Yow -A- O-8-31508 | FX Energy Operating, LLC only | Burns-Dalton(marble Falls) | Palo Pinto | 1 | 27.1K | 363K | Feb 2014 – Aug 2026 |
| McCullough O-13-29616 | Borderline Operating Corp. only | Antelope,s.e. (Marble Falls) | Jack | 1 | 27K | 140K | Jan 1999 – Aug 2009 |
| Harris Estate O-8-12392 | Johnson & Morris only | Santa Anna, S. (Marble Falls) | Coleman | 2 | 26.9K | 11.6K | by Jan 1993 – Aug 2026 |
| Richards Ranch O-13-31809 | Eagleridge Operating, LLC only | KRS (Marble Falls) | Jack | 1 | 26.8K | 725K | Dec 2010 – Jan 2025 |
| Southerlan Unit O-13-16496 | Pruitt Oil & Gas only | Joy, N.W. (Marble Falls) | Clay | 1 | 26.8K | 41 | by Jan 1993 – Aug 2006 |
| Conway O-13-33742 | Caribou Operating, Inc. only | Antelope,s.e. (Marble Falls) | Jack | 2 | 26.7K | 670K | May 2018 – Jul 2026 |
| Walker 'A' O-8-29546 | Dale Operating Company only | Walker-Davis (Marble Falls) | Stephens | 1 | 26.5K | 251K | Dec 2004 – Jul 2024 |
| McElroy O-13-33607 | G & F Oil, Inc. only | Antelope,s.e. (Marble Falls) | Jack | 2 | 26.4K | 83.5K | Jan 2017 – Jul 2026 |
| Reed Martin O-13-32567 | International Western Oil Corp only | KRS (Marble Falls) | Jack | 1 | 26.4K | 251K | Jun 2013 – Aug 2026 |
| Nickens O-13-32393 | Oakridge Oil and Gas, LP only | Neale (Marble Falls) | Jack | 4 | 26.1K | 322K | Mar 2012 – Jun 2024 |
| Long, Lolita O-8-25037 | Saguaro Petroleum, LLC only | C.B. Long, (Marble Falls) | Palo Pinto | 3 | 25.9K | 472K | by Jan 1993 – Sep 2017 |
| Lucas, W.R. O-8-24689 | Reach Oil only | Lake Brownwood (Marble Falls) | Brown | 7 | 25.9K | 31.1K | by Jan 1993 – Jul 2026 |
| Falls City Unit O-2-5358 | Legend Natural Gas II, LP only | Falls City (Mma) | Karnes | 4 | 25.7K | 3.24K | by Jan 1993 – Jan 1998 |
| Bloodworth O-13-32321 | Oakridge Oil and Gas, LP only | Neale (Marble Falls) | Jack | 2 | 25.1K | 470K | Aug 2012 – Jan 2016 |
| Cheryl "51" G-8-212084 | Texxol Operating Company, Inc. only | Walker-Davis (Marble Falls) | Stephens | 1 | 25.1K | 242K | Nov 2005 – Aug 2026 |
| Moczygemba, V. T. O-2-5352 | Legend Natural Gas II, LP only | Falls City (Ufa) | Karnes | 1 | 24.9K | 813 | by Jan 1993 – Aug 2005 |
| J.D. Johnson Ranch O-8-31216 | Eagleridge Operating, LLC only | Burns-Dalton(marble Falls) | Palo Pinto | 3 | 24.9K | 616K | Jan 2013 – Aug 2023 |
| Keller O-13-32936 | FX Energy Operating, LLC only | KRS (Marble Falls) | Jack | 2 | 24.9K | 637K | Apr 2014 – Aug 2026 |
| Ragle O-8-30994 | G & F Oil, Inc. only | Pickwick (Marble Falls) | Palo Pinto | 3 | 24.9K | 495K | Jun 2012 – Apr 2024 |
| Stamper-Fowler O-13-32753 | Oakridge Oil and Gas, LP only | KRS (Marble Falls) | Jack | 4 | 24.8K | 892K | Oct 2013 – Jun 2026 |
| Easter O-13-30783 | Best Petroleum Explorations,inc. only | Crum (Marble Falls) | Jack | 1 | 24.8K | 321K | Mar 2007 – Jan 2023 |
| Lester Carter 1 O-13-16668 | Paratus Petroleum LLC only | Lost Valley (Marble Falls) | Jack | 1 | 24.7K | 789K | by Jan 1993 – Aug 2026 |
| McFaddin, Caldwell O-13-28841 | Westico Energy Co. only | Benjamin, W. (Marble Falls) | Knox | 1 | 24.3K | 0 | Aug 1994 – Jan 2000 |