| Williams H.C. -B- G-8-63664 | Southwest Gas Systems, Inc. only | Brown Co. Regular (Marble Falls) | Brown | 1 | 991 | 61.2K | Jul 2001 – Aug 2026 |
| McMillan A O-13-33910 | Delfin Operating, LLC only | Bowie, SW. (Marble Falls) | Jack | 1 | 991 | 18.7K | Sep 2018 – Nov 2023 |
| Jack Brown O-13-32659 | D L Operating only | KRS (Marble Falls) | Jack | 1 | 990 | 22.3K | Jun 2012 – Sep 2014 |
| Allen, Alice E. Heirs G-8-116660 | Blackbird R 22 OG L.L.C. only | Carrie Cole (Marble Falls) | Eastland | 1 | 989 | 501K | by Jan 1993 – Jul 2025 |
| Rosser O-8-25177 | Ringo Rig LLC only | Byler H (Marble Falls) | Brown | 1 | 988 | 9.47K | by Jan 1993 – Sep 2019 |
| Dawson, D. B. G-8-18097 | Foundation Energy Management LLC only | Pottsville (Marble Falls) | Hamilton | 1 | 984 | 267K | by Jan 1993 – Mar 2019 |
| Wright Heirs O-13-32905 | Stovall Operating Co. only | KRS (Marble Falls) | Young | 1 | 984 | 16.2K | May 2014 – Apr 2020 |
| Jade O-8-30233 | Tracer Operating, Inc. only | Buck Creek (Marble Falls) | Palo Pinto | 1 | 981 | 10.2K | Aug 2008 – Aug 2009 |
| Walsh Ranch West G-8-236065 | Walsh & Watts, Inc. only | Walsh Ranch West (Marble Falls) | Parker | 1 | 981 | 494K | Sep 2008 – Aug 2026 |
| Ethel Worthington G-13-280448 | Oakridge Oil and Gas, LP only | Neale (Marble Falls) | Jack | 1 | 980 | 42.2K | May 2016 – Aug 2026 |
| Craddock G-8-129312 | Lesikar, L. W. only | Crawford (Marble Falls) | Eastland | 1 | 974 | 15.5K | by Jan 1993 – Jul 2001 |
| Sneed O-8-25848 | Mehaffey Investments, Inc. only | Crawford (Marble Falls) | Eastland | 1 | 971 | 2.5K | by Jan 1993 – Aug 1997 |
| Barnes, J.E. One G-8-106215 | North Ridge Corporation only | Ranger,nw (Marble Falls) | Eastland | 1 | 968 | 38.3K | by Jan 1993 – Feb 2005 |
| Thompson G-8-101989 | Southwest Gas Systems, Inc. only | Brown Co. Regular (Marble Falls) | Brown | 1 | 968 | 179K | by Jan 1993 – Aug 2026 |
| Sneed, Ernest G-8-141636 | Ronning Gas and Oil LLC only | Reb (Marble Falls) | Eastland | 1 | 963 | 60.2K | by Jan 1993 – Aug 2022 |
| Lann G-13-278828 | GO Oil Corp. only | KRS (Marble Falls) | Jack | 1 | 960 | 57.2K | Jun 2013 – Oct 2017 |
| B Rogers G-8-279235 | Graystone Operating, LLC only | Burns-Dalton(marble Falls) | Palo Pinto | 1 | 960 | 187K | Aug 2015 – Jul 2026 |
| Anderson-Cooper-Williams Unit G-13-278854 | Eagleridge Operating, LLC only | KRS (Marble Falls) | Jack | 1 | 958 | 149K | May 2015 – Apr 2021 |
| Anderson Bros. G-8-122345 | M. E. Operating & Services, Inc. only | Morenco (Marble Falls) | Eastland | 1 | 957 | 98.4K | by Jan 1993 – Feb 2016 |
| Robinson, Guy G-8-157224 | Tarpon Oil & Gas Co. only | Strawn, NW. (Marble Falls) | Palo Pinto | 1 | 957 | 77.1K | Jan 1996 – Mar 2002 |
| Higginbottom G-8-181668 | DMV Pipeline LLC only | Desdemona, E. (Marble Falls) | Erath | 1 | 956 | 250K | Feb 2001 – Feb 2020 |
| Red Bear G-13-269712 | Xplore Operating, LLC only | KRS (Marble Falls) | Jack | 1 | 954 | 172K | May 2013 – Dec 2017 |
| McAnear O-13-33662 | G & F Oil, Inc. only | KRS (Marble Falls) | Jack | 1 | 953 | 20.7K | May 2017 – Jul 2026 |
| Westfall Estate G-6-169019 | Cypress Operating, Inc. only | Shiloh (Travis Peak) | Rusk | 1 | 952 | 65.2K | Apr 1998 – Apr 1999 |
| Walter Ranch G-13-279107 | FX Energy Operating, LLC only | KRS (Marble Falls) | Palo Pinto | 1 | 952 | 38.3K | Dec 2015 – Sep 2018 |
| MM Terry Ranch Ltd G-8-194333 | Itx Corporation only | Veale (Marble Falls) | Stephens | 1 | 947 | 188K | Feb 2003 – Aug 2026 |
| Eison G-8-113919 | Eastland Operating, L.L.C. only | Mittie (Marble Falls) | Comanche | 1 | 942 | 308K | by Jan 1993 – Aug 2026 |
| Maxwell Unit G-13-279995 | Eagleridge Operating, LLC only | KRS (Marble Falls) | Jack | 1 | 941 | 77.6K | Feb 2015 – Aug 2021 |
| Snodgrass O-13-32751 | Borderline Operating Corp. only | KRS (Marble Falls) | Jack | 1 | 938 | 13.8K | Sep 2013 – Aug 2016 |
| Nickens O-13-32935 | Oakridge Oil and Gas, LP only | Kadane (Marble Falls) | Jack | 1 | 937 | 16.9K | Mar 2014 – Sep 2020 |
| Carter, Coy G-8-222976 | United Operating, LLC only | Moby Dick (Marble Falls) | Parker | 1 | 935 | 183K | Oct 2006 – Mar 2012 |
| Ashbrook O-8-32022 | FX Energy Operating, LLC only | Burns-Dalton(marble Falls) | Parker | 1 | 935 | 84.3K | Jun 2016 – Feb 2021 |
| Ryan Mortgage Company O-8-31483 | Dallas Production, Inc. only | Marble Falls (4070) | Palo Pinto | 1 | 934 | 82.2K | Mar 2013 – Dec 2016 |
| Pre-Emption O-8-17262 | Eastland Operating, L.L.C. only | Ranger,nw (Marble Falls) | Eastland | 4 | 931 | 78K | by Jan 1993 – Feb 2001 |
| Lewis, H. H. G-13-70446 | Felderhoff Production Company only | Weiler (Marble Falls) | Jack | 1 | 929 | 499K | by Jan 1993 – Jul 2026 |
| Murphy G-8-276086 | Eagleridge Operating, LLC only | Burns-Dalton(marble Falls) | Palo Pinto | 1 | 929 | 136K | Dec 2014 – Jul 2020 |
| Scudder O-8-26276 | Mitchell Energy Corporation only | Burns-Dalton(marble Falls) | Jack | 1 | 928 | 8.1K | by Jan 1993 – Aug 1994 |
| Clayton Ranch C G-13-286355 | Oakridge Oil and Gas, LP only | Neale (Marble Falls) | Jack | 1 | 926 | 101K | Feb 2019 – Jan 2023 |
| Dutro G-8-203404 | Upham Oil & Gas Company only | Burns-Dalton(marble Falls) | Palo Pinto | 1 | 921 | 130K | Jul 2004 – Aug 2026 |
| Hart O-13-33442 | FX Energy Operating, LLC only | KRS (Marble Falls) | Jack | 1 | 921 | 48.5K | Dec 2015 – Oct 2018 |
| Hardoncourt, Frances G-8-148296 | Texxol Operating Company, Inc. only | Burns-Dalton(marble Falls) | Palo Pinto | 1 | 916 | 139K | Jan 1994 – Aug 2026 |
| Leveridge, M.R. O-8-26283 | Russell, T. Operating Inc. only | Walker-Davis (Marble Falls) | Stephens | 2 | 915 | 52.4K | Feb 1993 – Mar 1998 |
| Cate,j. G-8-114817 | C O G Company only | COG (Marble Falls) | Brown | 1 | 912 | 162K | by Jan 1993 – Aug 2026 |
| Martin G-8-122539 | Mogul Resources, LLC only | Morenco (Marble Falls) | Eastland | 1 | 912 | 120K | by Jan 1993 – Jun 2021 |
| AC Eason O-13-32227 | Eagleridge Operating, LLC only | KRS (Marble Falls) | Jack | 1 | 908 | 1.97K | Nov 2012 – Oct 2014 |
| Robertson "M" O-8-14084 | Littlepage, Tommy only | Crystal Falls, East (Miss) | Stephens | 2 | 905 | 5.54K | by Jan 1993 – Sep 1993 |
| Johnson Ranch G-8-286043 | Eagleridge Operating, LLC only | Burns-Dalton(marble Falls) | Palo Pinto | 1 | 905 | 1.78K | Apr 2018 – Jun 2023 |
| Ankenbauer G-8-169206 | Dodson Prairie Oil & Gas LLC only | Strawn, NW. (Marble Falls) | Palo Pinto | 1 | 905 | 279K | Jun 1998 – Apr 2023 |
| Stover, Don "C" O-8-22027 | Southeastern Resources Corp. only | Williams (Marble Falls) | Brown | 2 | 901 | 90K | by Jan 1993 – Aug 1996 |
| McClure Agt G-13-283668 | Oakridge Oil and Gas, LP only | KRS (Marble Falls) | Jack | 1 | 901 | 267K | Feb 2018 – Aug 2026 |