| Martin "a" #135-139-01647 | Mountainside Energy Operating, LLC | Texas | ActiveGas | 2,857 | Mar 24, 2020 | Apr 2, 2004 | — |
| J C Walter #1-1935-149-20066 | Mountainside Energy Operating, LLC | WashitaAtoka B | ActiveGas | 14,271 | Dec 4, 2015 | Jan 17, 1980 | — |
| Grider #12 #135-139-23366 | Mountainside Energy Operating, LLC | TexasFort Riley UP | ActiveGas | 7,200 | Dec 15, 2010 | Oct 10, 2001 | — |
| M.L. Guier #1R35-139-23309 | Mountainside Energy Operating, LLC | TexasGuymon-Hugoton | ActiveGas | 2,804 | Sep 9, 2008 | Jun 5, 2001 | — |
| D.S. Lee (Nash a 1) #235-139-20363 | Mountainside Energy Operating, LLC | Texas | ActiveGas | 7,200 | Apr 16, 2008 | Jul 26, 1979 | — |
| E.J. Truesdell #135-139-00790 | Mountainside Energy Operating, LLC | Texas | ActiveGas | 2,911 | Apr 5, 2007 | Jan 21, 1945 | — |
| Hitch Enterprises #7 #835-139-23586 | Mountainside Energy Operating, LLC | Texas | ActiveGas | 6,900 | Sep 25, 2006 | Mar 3, 2003 | — |
| Gladys #35 #135-139-23688 | Mountainside Energy Operating, LLC | TexasFort Riley | ActiveGas | 7,150 | Sep 25, 2006 | Dec 15, 2003 | — |
| Hudiburg Unit #135-139-00980 | Mountainside Energy Operating, LLC | Texas | ActiveGas | 2,845 | Apr 28, 2006 | Oct 18, 1945 | — |
| Rudolph Johnson #135-139-00964 | Mountainside Energy Operating, LLC | Texas | ActiveGas | 2,890 | Apr 21, 2006 | Nov 15, 1945 | — |
| Montgomery Unit (Montgomery a-1) #135-139-01807 | Mountainside Energy Operating, LLC | Texas | ActiveGas | 2,768 | Apr 21, 2006 | Apr 18, 1945 | — |
| Oklahoma "a" #135-139-01873 | Mountainside Energy Operating, LLC | Texas | ActiveGas | 2,761 | Apr 21, 2006 | Oct 20, 1948 | — |
| Enz, G.A. (G Enz) #135-139-01007 | Mountainside Energy Operating, LLC | Texas | ActiveGas | 2,900 | Mar 9, 2006 | Jul 23, 1946 | — |
| W. H. Wacker (H W Wacker) #135-139-21870 | Mountainside Energy Operating, LLC | Texas | ActiveOil | 5,950 | Feb 27, 2006 | May 11, 1984 | — |
| Davis-Hitch UT #135-139-00791 | Mountainside Energy Operating, LLC | Texas | ActiveGas | 2,887 | Oct 27, 2005 | Oct 16, 1947 | — |
| Joyce Hitch #135-139-00800 | Mountainside Energy Operating, LLC | Texas | ActiveGas | 2,887 | Oct 27, 2005 | Aug 14, 1947 | — |
| Raymond Smith UT #135-139-00966 | Mountainside Energy Operating, LLC | Texas | ActiveGas | 2,847 | Oct 27, 2005 | Nov 9, 1945 | — |
| Roseberry Unit #135-139-00978 | Mountainside Energy Operating, LLC | Texas | ActiveGas | 2,710 | Aug 17, 2005 | Oct 17, 1945 | — |
| Tiger #1-535-139-22898 | Mountainside Energy Operating, LLC | TexasFort Riley | ActiveGas | 2,998 | Aug 1, 2005 | Jan 29, 2006 | — |
| Wiggins B #2R35-139-24028 | Mountainside Energy Operating, LLC | TexasFort Riley | ActiveGas | 2,980 | Aug 1, 2005 | Mar 22, 2006 | — |
| Kate Jackson #2R35-139-24029 | Mountainside Energy Operating, LLC | Texas | ActiveGas | 2,960 | Aug 1, 2005 | Feb 7, 2006 | — |
| Patrick "B" #135-139-00818 | Mountainside Energy Operating, LLC | Texas | ActiveGas | 2,900 | Jun 24, 2005 | Oct 24, 2005 | — |
| J E Wise #135-139-00770 | Mountainside Energy Operating, LLC | Texas | ActiveGas | 2,810 | Jun 9, 2005 | Jul 19, 1945 | — |
| B.H. Gleckler #135-139-00990 | Mountainside Energy Operating, LLC | Texas | ActiveGas | 2,775 | Jun 7, 2005 | Aug 13, 1946 | — |
| J.E. Wise #235-139-35482 | Mountainside Energy Operating, LLC | TexasCherokee | Dry holeDry hole | 6,875 | Jun 6, 2005 | Jun 8, 2005 | — |
| Neville #6 #135-139-22700 | Mountainside Energy Operating, LLC | Texas | ActiveGas | 7,107 | May 13, 2005 | Feb 1, 1997 | — |
| Brown-Safranko #135-139-00751 | Mountainside Energy Operating, LLC | Texas | ActiveGas | 2,920 | Mar 23, 2005 | Feb 3, 1950 | — |
| Lee Willoughby Unit #135-139-00971 | Mountainside Energy Operating, LLC | Texas | ActiveGas | 2,770 | Feb 11, 2005 | Nov 25, 1945 | — |
| R L Nesmith Unit #135-139-00972 | Mountainside Energy Operating, LLC | Texas | ActiveGas | 2,778 | Feb 11, 2005 | Mar 14, 1946 | — |
| Minnie Matlick Unit #135-139-00979 | Mountainside Energy Operating, LLC | Texas | ActiveGas | 2,860 | Feb 11, 2005 | Nov 29, 1945 | — |
| Rea Gill Unit #135-139-01665 | Mountainside Energy Operating, LLC | Texas | ActiveGas | 2,757 | Feb 11, 2005 | Jul 25, 1946 | — |
| You-Gene #14 #135-139-23600 | Mountainside Energy Operating, LLC | Texas | Dry holeDry hole | 7,078 | Jan 12, 2005 | May 4, 2003 | — |
| E.V. Phillips #135-139-00795 | Mountainside Energy Operating, LLC | Texas | ActiveGas | 2,870 | Nov 18, 2004 | Jan 15, 1948 | — |
| John T Houser Unit #135-139-00973 | Mountainside Energy Operating, LLC | Texas | ActiveGas | 2,850 | Nov 18, 2004 | Feb 14, 1946 | — |
| Olson A. Unit (Christian Olson) #135-139-00761 | Mountainside Energy Operating, LLC | Texas | ActiveGas | 2,902 | Nov 15, 2004 | Apr 25, 1945 | — |
| Ray G. Keller UT #135-139-00763 | Mountainside Energy Operating, LLC | TexasKrider | ActiveGas | 2,798 | Nov 15, 2004 | Aug 19, 1946 | — |
| Wiggins "a" #135-139-00767 | Mountainside Energy Operating, LLC | Texas | ActiveGas | 2,891 | Nov 15, 2004 | Oct 25, 1945 | — |
| Ralph E. Zarker Ut. #135-139-00798 | Mountainside Energy Operating, LLC | Texas | ActiveGas | 2,886 | Nov 15, 2004 | Sep 5, 1947 | — |
| Hurliman "B" Unit #135-139-00970 | Mountainside Energy Operating, LLC | Texas | ActiveGas | 2,712 | Nov 15, 2004 | Nov 15, 1945 | — |
| Leon Allen UT #135-139-00744 | Mountainside Energy Operating, LLC | Texas | ActiveGas | 2,781 | Oct 27, 2004 | Aug 31, 1946 | — |
| Kate Jackson #135-139-00769 | Mountainside Energy Operating, LLC | Texas | ActiveGas | 2,809 | Jun 22, 2004 | Aug 30, 2004 | — |
| Jack Curtis Unit #135-139-00983 | Mountainside Energy Operating, LLC | Texas | ActiveGas | 2,797 | Jun 22, 2004 | Mar 14, 1946 | — |
| B.O. Perkins Unit #135-139-00984 | Mountainside Energy Operating, LLC | Texas | ActiveGas | 2,850 | Jun 22, 2004 | May 12, 1945 | — |
| Porter Unit (Porter 1) #135-139-01672 | Mountainside Energy Operating, LLC | Texas | ActiveGas | 2,795 | Jun 22, 2004 | Apr 25, 1945 | — |
| Patrick #1 A35-139-01808 | Mountainside Energy Operating, LLC | Texas | ActiveGas | 2,805 | Jun 14, 2004 | May 20, 1945 | — |
| Enns Trust #24-135-139-22868 | Mountainside Energy Operating, LLC | TexasFort Riley | ActiveGas | 3,393 | Jun 14, 2004 | Aug 19, 2004 | — |
| Charles Geery #135-139-00768 | Mountainside Energy Operating, LLC | Texas | ActiveGas | 2,895 | May 7, 2004 | May 2, 1945 | — |
| A.J. Davidson #135-139-00981 | Mountainside Energy Operating, LLC | Texas | ActiveGas | 2,809 | May 7, 2004 | Aug 13, 1946 | — |
| Martin "B" #135-139-01648 | Mountainside Energy Operating, LLC | Texas | ActiveGas | 2,870 | May 7, 2004 | May 9, 1945 | — |
| Goss Unit #135-139-00764 | Mountainside Energy Operating, LLC | Texas | ActiveGas | 2,865 | May 6, 2004 | Jun 20, 1945 | — |