| Tomball Gas Unit No. 9 G-3-207934 | Tandem Energy Corporation | Tomball (Michel) | Harris | 1 | 172K | 1.19M | Jan 2005 – Apr 2026 |
| Ball G-8-186406 | Tandem Energy Corporation | Birdsong (Lake Sand) | Palo Pinto | 1 | 5.56K | 426K | Nov 2001 – Apr 2026 |
| Ball G-8-70068 | Tandem Energy Corporation | Palo Pinto Co. Reg. (Gas) | Palo Pinto | 1 | 1.25K | 39.2K | Jan 1993 – Nov 1996 |
| Tomball Gas Unit 9 G-3-146082 | Tandem Energy Corporation | Tomball (Wilcox 8400) | Harris | 1 | 934 | 270K | Jul 1993 – Mar 2001 |
| Ball G-8-255750 | Tandem Energy Corporation | Strawn, East (Marble Falls) | Palo Pinto | 1 | 722 | 276K | Oct 2009 – Jan 2026 |
| Tomball Gas Unit "9" G-3-248052 | Tandem Energy Corporation | Tomball (Wilcox 8860, 2ND) | Harris | 1 | 326 | 446K | Mar 2008 – Dec 2019 |
| Ball G-8-197334 | Tandem Energy Corporation | C.B. Long, (Marble Falls) | Palo Pinto | 1 | 319 | 337K | Sep 2003 – Apr 2026 |
| Ball G-8-184082 | Tandem Energy Corporation | C.B. Long, (Marble Falls) | Palo Pinto | 1 | 313 | 239K | Jul 2001 – Dec 2004 |
| Ball G-8-273851 | Tandem Energy Corporation | Strawn, East (Marble Falls) | Palo Pinto | 1 | 305 | 136K | Mar 2013 – Mar 2024 |
| Tomball GU 9 G-3-51663 | Tandem Energy Corporation | Tomball (Schultz SE.) | Harris | 1 | 195 | 73.6K | Jan 1993 – Sep 2010 |
| Ball G-8-226666 | Tandem Energy Corporation | C.B. Long, (Marble Falls) | Palo Pinto | 1 | 153 | 154K | Apr 2007 – Apr 2026 |
| Ball G-8-208550 | Tandem Energy Corporation | Pywacket, (Duffer) | Palo Pinto | 1 | 148 | 323K | Jan 2005 – Jun 2018 |
| Bird, Henry G-8-215635 | Tandem Energy Corporation | Strawn (Marble Falls Strawn) | Palo Pinto | 1 | 128 | 120K | Feb 2006 – Apr 2026 |
| Ball G-8-263501 | Tandem Energy Corporation | Birdsong (Lake Sand) | Palo Pinto | 1 | 126 | 162K | Jul 2010 – Sep 2017 |
| Tomball GU 6 G-3-71536 | Tandem Energy Corporation | Tomball (Cockfield Upper 5500) | Harris | 1 | 75 | 320K | Jan 1993 – Aug 2002 |
| Tomball GU 9 G-3-127891 | Tandem Energy Corporation | Tomball (Lewis 5930, East) | Harris | 1 | 73 | 101K | Aug 1999 – Apr 2026 |
| Ball G-8-76163 | Tandem Energy Corporation | Strawn, East (Marble Falls) | Palo Pinto | 1 | 49 | 950K | Jan 1993 – Jan 2026 |
| Bird, Henry G-8-201667 | Tandem Energy Corporation | Palo Pinto Co. Reg. (Gas) | Palo Pinto | 1 | 48 | 107K | Jun 2004 – Jul 2013 |
| Ball G-8-128255 | Tandem Energy Corporation | Strawn, East (Marble Falls) | Palo Pinto | 1 | 41 | 515K | Jan 1993 – Feb 2019 |
| Ball G-8-172322 | Tandem Energy Corporation | Palo Pinto Co. Reg. (Gas) | Palo Pinto | 1 | 40 | 221K | Feb 1999 – Nov 2010 |
| Ball G-8-241378 | Tandem Energy Corporation | Strawn, East (Marble Falls) | Palo Pinto | 1 | 39 | 100K | Dec 2007 – Aug 2020 |
| Ball G-8-273813 | Tandem Energy Corporation | Birdsong (Lake Sand) | Palo Pinto | 1 | 35 | 2.88K | Jan 2011 – Feb 2015 |
| Ball "Ashworth" G-8-86556 | Tandem Energy Corporation | Strawn, East (Marble Falls) | Palo Pinto | 1 | 24 | 438K | Jan 1993 – Jun 2017 |
| Ball G-8-205001 | Tandem Energy Corporation | Rector (Barnett Shale) | Palo Pinto | 1 | 19 | 178K | Sep 2004 – Apr 2026 |
| Ball G-8-215653 | Tandem Energy Corporation | Pywacket, (Duffer) | Palo Pinto | 1 | 12 | 214K | Apr 2006 – Mar 2024 |
| Ball G-8-226667 | Tandem Energy Corporation | C.B. Long, (Marble Falls) | Palo Pinto | 1 | 11 | 69K | Apr 2007 – Apr 2026 |
| Bird, Henry G-8-150347 | Tandem Energy Corporation | Strawn (Marble Falls) | Palo Pinto | 1 | 4 | 409K | Mar 1994 – May 2012 |
| Ball G-8-128256 | Tandem Energy Corporation | Strawn, East (Marble Falls) | Palo Pinto | 1 | 3 | 333K | Jan 1993 – Mar 2015 |
| Ball G-8-124150 | Tandem Energy Corporation | Palo Pinto Co. Reg. (Gas) | Palo Pinto | 1 | 3 | 138K | Jan 1993 – Sep 2021 |
| Ball G-8-98783 | Tandem Energy Corporation | Pywacket, (Duffer) | Palo Pinto | 1 | 0 | 32.9K | Jan 1993 – Nov 1996 |
| Bird, Henry G-8-150306 | Tandem Energy Corporation | Strawn, North (Marble Falls) | Palo Pinto | 1 | 0 | 89.8K | Feb 1994 – Jan 2001 |
| Ball G-8-161184 | Tandem Energy Corporation | Strawn, East (Marble Falls) | Palo Pinto | 1 | 0 | 204K | Nov 1996 – Jul 2015 |
| Ball "Ashworth" G-8-165539 | Tandem Energy Corporation | Strawn, East (Marble Falls) | Palo Pinto | 1 | 0 | 286K | Nov 1997 – Sep 2015 |
| Ball G-8-171932 | Tandem Energy Corporation | Palo Pinto County Regular | Palo Pinto | 1 | 0 | 10K | Nov 1998 – Jan 1999 |
| Ball G-8-171944 | Tandem Energy Corporation | Strawn, East (Marble Falls) | Palo Pinto | 1 | 0 | 0 | — |
| Ball G-8-176246 | Tandem Energy Corporation | Strawn, North (Marble Falls) | Palo Pinto | 1 | 0 | 36.4K | Feb 2000 – Jan 2005 |
| Tomball Gas Unit "9" G-3-217998 | Tandem Energy Corporation | Hooks (Shallow) | Harris | 1 | 0 | 32.6K | Jan 2006 – Jan 2009 |
| Tomball Gas Unit 9 G-3-148471 | Tandem Energy Corporation | Tomball (Cockfield Upper 5500SW) | Harris | 1 | 0 | 0 | — |
| Ball G-8-192521 | Tandem Energy Corporation | Birdsong (Lake Sand) | Palo Pinto | 1 | 0 | 20.7K | Dec 2002 – Aug 2003 |
| Tomball GU 5 G-3-135259 | Tandem Energy Corporation | Tomball | Harris | 1 | 0 | 0 | — |
| Ball G-8-204250 | Tandem Energy Corporation | Rector (Barnett Shale) | Palo Pinto | 1 | 0 | 0 | — |
| Ball G-8-204989 | Tandem Energy Corporation | Rector (Barnett Shale) | Palo Pinto | 1 | 0 | 85.6K | Aug 2004 – Oct 2013 |
| Choate Fee G-3-130783 | Tandem Energy Corporation | Batson New | Hardin | 1 | 0 | 37.1K | Jan 1993 – Oct 2011 |
| Choate Fee G-3-113758 | Tandem Energy Corporation | Batson New | Hardin | 1 | 0 | 56.9K | Jan 1993 – Oct 2011 |
| Tomball GU 9 G-3-101195 | Tandem Energy Corporation | Tomball (Wilcox 8860, 2ND) | Harris | 1 | 0 | 0 | — |
| Tomball GU 16 G-3-99515 | Tandem Energy Corporation | Tomball (Stray 5300) | Harris | 1 | 0 | 205K | Jan 1993 – Apr 2003 |
| Tomball G U 9 G-3-86064 | Tandem Energy Corporation | Tomball (Jackson 4400,SE) | Harris | 1 | 0 | 0 | — |
| Tomball GU 9 G-3-72891 | Tandem Energy Corporation | Tomball (Jackson 4400,SE) | Harris | 1 | 0 | 0 | — |
| Tomball Gas Unit 6 G-3-157867 | Tandem Energy Corporation | Wildcat | Harris | 1 | 0 | 0 | — |
| Tomball Gas Unit "9" G-3-218754 | Tandem Energy Corporation | Hooks (Shallow) | Harris | 1 | 0 | 294K | Jun 2006 – Apr 2026 |