| Conroe Field Unit #1633HHZ42-339-31126 | Highmark Energy Operating LLC | Montgomery, TXConroe | ActiveOil | 4,967 | Mar 20, 2019 | — | — |
| Covington Ella B #22R42-445-32457 | Highmark Energy Operating LLC | Terry, TXSuntura (Lower Clear Fork) | ActiveOil | 8,492 | Nov 5, 2018 | — | — |
| Malinda 745 #1HRHZ42-357-33696 | Highmark Energy Operating LLC | Ochiltree, TXAllen-Parker (Marmaton) | ActiveGas | 7,152 | Sep 7, 2018 | — | — |
| Covington Ella B #2942-445-32454 | Highmark Energy Operating LLC | Terry, TXSuntura (Lower Clear Fork) | ActiveOil | 8,501 | Sep 4, 2018 | — | — |
| Malinda 745 #2HHZ42-357-33682 | Highmark Energy Operating LLC | Ochiltree, TXAllen-Parker (Marmaton) | ActiveOil | 7,181 | May 4, 2018 | — | — |
| Covington Ella B #2342-445-32452 | Highmark Energy Operating LLC | Terry, TXSuntura (Lower Clear Fork) | ActiveOil | 8,483 | Aug 29, 2017 | — | — |
| Covington Ella B #2142-445-32451 | Highmark Energy Operating LLC | Terry, TXSuntura (Lower Clear Fork) | ActiveOil | 8,500 | Aug 15, 2017 | — | — |
| Southland Royalty D #442-003-39716 | Highmark Energy Operating LLC | Andrews, TXDeep Rock (Glorieta 5950) | ActiveInjection | 9,515 | Apr 4, 2017 | — | — |
| Reba N Miller #12HHZ42-295-34307 | Highmark Energy Operating LLC | Lipscomb, TXLipscomb (Cleveland) | ActiveGas | 7,722 | Oct 14, 2016 | — | — |
| Harry Parker 697 #8HHZ42-295-34302 | Highmark Energy Operating LLC | Lipscomb, TXLipscomb (Cleveland) | ActiveGas | 7,811 | Oct 5, 2016 | — | — |
| Reba N Miller #18HHZ42-295-34303 | Highmark Energy Operating LLC | Lipscomb, TXLipscomb (Cleveland) | ActiveGas | 7,759 | Sep 2, 2016 | — | — |
| Harry Parker 697 #9HHZ42-295-34300 | Highmark Energy Operating LLC | Lipscomb, TXLipscomb (Cleveland) | ActiveGas | 7,883 | Aug 26, 2016 | — | — |
| Harry Parker 697 #10HHZ42-295-34301 | Highmark Energy Operating LLC | Lipscomb, TXLipscomb (Cleveland) | ActiveGas | 7,828 | Aug 26, 2016 | — | — |
| Harry Parker 697 #7HHZ42-295-34299 | Highmark Energy Operating LLC | Lipscomb, TXLipscomb (Cleveland) | ActiveGas | 7,855 | Aug 24, 2016 | — | — |
| Covington Ella B #2042-445-32436 | Highmark Energy Operating LLC | Terry, TXSuntura (Lower Clear Fork) | ActiveOil | 8,513 | Aug 22, 2016 | — | — |
| Weidner 798 #5HHZ42-295-34230 | Highmark Energy Operating LLC | Lipscomb, TXLipscomb (Cleveland) | ActiveOil | 7,749 | Dec 8, 2014 | — | — |
| Deep Rock Etal -a- #11G42-003-46169 | Highmark Energy Operating LLC | Andrews, TXDeep Rock (Glorieta 5950) | ActiveInjection | 6,235 | May 5, 2014 | — | — |
| Deep Rock Etal -a- #12G42-003-46170 | Highmark Energy Operating LLC | Andrews, TXDeep Rock (Glorieta 5950) | ActiveInjection | 6,151 | May 5, 2014 | — | — |
| Lowe M. R. 6 #342-003-46073 | Highmark Energy Operating LLC | Andrews, TXFullerton | Shut inOil | 7,450 | Mar 27, 2014 | — | — |
| Bitler-Lowe -B- #1342-003-46074 | Highmark Energy Operating LLC | Andrews, TXFullerton | Shut inOil | 7,600 | Mar 27, 2014 | — | — |
| Conroe Field Unit #152942-339-31119 | Highmark Energy Operating LLC | Montgomery, TXConroe | ActiveOil | 5,442 | Nov 13, 2013 | — | — |
| Conroe Field Unit #163642-339-31116 | Highmark Energy Operating LLC | Montgomery, TXConroe | ActiveInjection | 5,373 | Jul 26, 2013 | — | — |
| Prentice Northeast Unit #190442-445-32369 | Highmark Energy Operating LLC | Terry, TXPrentice (6700) | ActiveOil | 7,370 | Apr 12, 2013 | — | — |
| Conroe Field Unit #212342-339-31109 | Highmark Energy Operating LLC | Montgomery, TXConroe | ActiveInjection | 5,458 | Sep 18, 2012 | — | — |
| Bitler-Lowe -B- #2242-003-44588 | Highmark Energy Operating LLC | Andrews, TXFullerton | Shut inOil | 7,295 | Jul 23, 2012 | — | — |
| Bitler-Lowe Clearfork Unit #2542-003-44281 | Highmark Energy Operating LLC | Andrews, TXFullerton | Shut inOil | 7,299 | May 4, 2012 | — | — |
| Bitler-Lowe Clearfork Unit #2642-003-44283 | Highmark Energy Operating LLC | Andrews, TXFullerton | Shut inOil | 7,299 | May 4, 2012 | — | — |
| Bitler-Lowe Clearfork Unit #2742-003-44284 | Highmark Energy Operating LLC | Andrews, TXFullerton | ActiveOil | 7,292 | May 4, 2012 | — | — |
| Bitler-Lowe Clearfork Unit #2842-003-44254 | Highmark Energy Operating LLC | Andrews, TXFullerton | ActiveOil | 7,291 | May 1, 2012 | — | — |
| Prentice Northeast Unit #52742-445-32312 | Highmark Energy Operating LLC | Terry, TXPrentice (6700) | Shut inOil | 7,290 | Nov 1, 2011 | — | — |
| Prentice Northeast Unit #58142-445-32313 | Highmark Energy Operating LLC | Terry, TXPrentice (6700) | ActiveOil | 7,320 | Oct 14, 2011 | — | — |
| Davis L. T. #39442-003-43470 | Highmark Energy Operating LLC | Andrews, TXFuhrman (Glorieta) | Shut inOil | 6,042 | Sep 30, 2011 | — | — |
| Davis L. T. #39942-003-43417 | Highmark Energy Operating LLC | Andrews, TXFuhrman-Mascho | Shut inOil | 6,058 | Sep 16, 2011 | — | — |
| E. F. King #39842-003-43357 | Highmark Energy Operating LLC | Andrews, TXFuhrman (Glorieta) | ActiveOil | 5,827 | Aug 29, 2011 | — | — |
| Lowe M. R. 15 #842-003-43275 | Highmark Energy Operating LLC | Andrews, TXFullerton | ActiveOil | 7,258 | Aug 12, 2011 | — | — |
| Conroe Field Unit #32042-339-31098 | Highmark Energy Operating LLC | Montgomery, TXConroe | ActiveOil | 8,628 | Jun 27, 2011 | — | — |
| Bitler-Lowe Clearfork Unit #3842-003-43075 | Highmark Energy Operating LLC | Andrews, TXFullerton | Shut inOil | 7,290 | Jun 21, 2011 | — | — |
| Bitler-Lowe Clearfork Unit #3742-003-43008 | Highmark Energy Operating LLC | Andrews, TXFullerton | Shut inOil | 7,315 | Jun 7, 2011 | — | — |
| Bitler-Lowe -B- #2142-003-43007 | Highmark Energy Operating LLC | Andrews, TXFullerton | Shut inOil | 7,324 | Jun 6, 2011 | — | — |
| Bitler-Lowe -B- #1842-003-42838 | Highmark Energy Operating LLC | Andrews, TXFullerton | Shut inOil | 7,313 | Apr 18, 2011 | — | — |
| Bitler-Lowe -B- #1942-003-42839 | Highmark Energy Operating LLC | Andrews, TXFullerton | Shut inOil | 7,318 | Apr 18, 2011 | — | — |
| Bitler-Lowe Clearfork Unit #3342-003-42840 | Highmark Energy Operating LLC | Andrews, TXFullerton | Shut inOil | 7,304 | Apr 18, 2011 | — | — |
| Bitler-Lowe Clearfork Unit #3042-003-42841 | Highmark Energy Operating LLC | Andrews, TXFullerton | Shut inOil | 7,320 | Apr 18, 2011 | — | — |
| Shafter Lake Clearfork Unit #507842-003-39235 | Highmark Energy Operating LLC | Andrews, TXShafter Lake (Clear Fork) | ActiveOil | 6,999 | Mar 9, 2011 | — | — |
| Appel 438 #142-295-32992 | Highmark Energy Operating LLC | Lipscomb, TXLipscomb E. (Des Moines) | Shut inOil | 10,150 | Jan 14, 2011 | — | — |
| Prentice Northeast Unit #618HHZ42-445-32082 | Highmark Energy Operating LLC | Terry, TXPrentice (6700) | ActiveOil | 7,385 | Aug 6, 2010 | — | — |
| Doyle J.B. #742-295-33006 | Highmark Energy Operating LLC | Lipscomb, TXLipscomb (Cleveland) | Temporarily abandonedGas | 8,200 | Jun 18, 2010 | — | — |
| Doyle J.B. #3M42-295-32538 | Highmark Energy Operating LLC | Lipscomb, TXLipscomb (Morrow) | Temporarily abandonedGas | 10,500 | Nov 26, 2008 | — | — |
| Shafter Lake Clearfork Unit #505R42-003-40909 | Highmark Energy Operating LLC | Andrews, TXShafter Lake (Clear Fork) | Shut inOil | 6,847 | Nov 13, 2008 | — | — |
| Lowe M. R. 6 #242-003-40813 | Highmark Energy Operating LLC | Andrews, TXFullerton | Shut inOil | 7,300 | Oct 4, 2008 | — | — |