| Cree Sykes Unit #62942-399-34908 | Atlas Operating LLC | Runnels, TXCree-Sykes (Gardner Upper) | ActiveOil | 4,240 | Dec 16, 2005 | — | — |
| Cree Sykes Unit #141142-399-34909 | Atlas Operating LLC | Runnels, TXCree-Sykes (Gardner Upper) | PluggedOil | 4,800 | Dec 16, 2005 | — | — |
| Temple #142-347-32164 | Atlas Operating LLC | Nacogdoches, TXNaconiche Creek (Rod.-TP Cons.) | ActiveGas | 9,460 | Nov 7, 2005 | — | — |
| Arledge G. H. C #1742-415-31471 | Atlas Operating LLC | Scurry, TXDiamond -M- (Clear Fork) | Shut inOil | 6,823 | Nov 1, 2005 | — | — |
| Damuth Gas Unit #1 #1HZ42-225-31060 | Atlas Operating LLC | Houston, TXDecker Switch (Pettit) | ActiveGas | 10,595 | Oct 19, 2005 | — | — |
| Cree Sykes Unit #53342-399-34893 | Atlas Operating LLC | Runnels, TXCree-Sykes (Gardner Upper) | ActiveOil | 4,350 | Oct 13, 2005 | — | — |
| Temple-Inland IV #4HZ42-001-32497 | Atlas Operating LLC | Anderson, TXDecker Switch (Pettit) | ActiveGas | 9,982 | Oct 12, 2005 | — | — |
| Cree Sykes Unit #503242-399-34890 | Atlas Operating LLC | Runnels, TXCree-Sykes (Gardner Upper) | ActiveOil | 4,818 | Oct 6, 2005 | — | — |
| Hidalgo-Willacy #13B42-215-31948 | Atlas Operating LLC | Hidalgo, TXTexan Gardens-Tabasco N. (Cons) | ActiveGas | 10,166 | Sep 30, 2005 | — | — |
| Cree Sykes Unit #62842-399-34879 | Atlas Operating LLC | Runnels, TXCree-Sykes (Gardner Upper) | ActiveOil | 4,204 | Sep 29, 2005 | — | — |
| Cree Sykes Unit #602742-399-34880 | Atlas Operating LLC | Runnels, TXCree-Sykes (Gardner Upper) | ActiveOil | 4,308 | Sep 29, 2005 | — | — |
| Cree Sykes Unit #602542-399-34882 | Atlas Operating LLC | Runnels, TXCree-Sykes (Gardner Upper) | ActiveOil | 4,330 | Sep 29, 2005 | — | — |
| Cree Sykes Unit #602342-399-34884 | Atlas Operating LLC | Runnels, TXCree-Sykes (Gardner Upper) | ActiveOil | 4,302 | Sep 29, 2005 | — | — |
| Cree Sykes Unit #602242-399-34872 | Atlas Operating LLC | Runnels, TXCree-Sykes (Gardner Upper) | ActiveOil | 4,702 | Sep 15, 2005 | — | — |
| Zamora Unit #242-215-31651 | Atlas Operating LLC | Hidalgo, TXTexan Gardens-Tabasco N. (Cons) | ActiveGas | 9,224 | Sep 8, 2005 | — | — |
| Burkhart Gas Unit #142-321-32075 | Atlas Operating LLC | Matagorda, TXSilverspoon (Tex SA1 Sand) | Temporarily abandonedGas | 16,600 | Aug 30, 2005 | — | — |
| Cree Sykes Unit #602142-399-34871 | Atlas Operating LLC | Runnels, TXCree-Sykes (Gardner Upper) | ActiveOil | 4,770 | Aug 24, 2005 | — | — |
| Cree Sykes Unit #602042-399-34868 | Atlas Operating LLC | Runnels, TXCree-Sykes (Gardner Upper) | ActiveOil | 4,723 | Aug 16, 2005 | — | — |
| Hidalgo-Willacy #242-215-31747 | Atlas Operating LLC | Hidalgo, TXTexan Gardens-Tabasco N. (Cons) | ActiveGas | 8,750 | Aug 12, 2005 | — | — |
| South Pena Creek Unit #47442-127-33285 | Atlas Operating LLC | Dimmit, TXPena Creek (San Miguel 3RD) | ActiveInjection | 3,340 | Jul 1, 2005 | — | — |
| Hickey #242-325-33594 | Atlas Operating LLC | Medina, TXAdams (Olmos Navarro) | Temporarily abandonedGas | 971 | Jun 28, 2005 | — | — |
| Hickey #342-325-33595 | Atlas Operating LLC | Medina, TXAdams (Olmos Navarro) | Temporarily abandonedGas | 997 | Jun 28, 2005 | — | — |
| Hickey #442-325-33596 | Atlas Operating LLC | Medina, TXAdams (Olmos Navarro) | Temporarily abandonedGas | 983 | Jun 28, 2005 | — | — |
| Pena Creek Unit #21742-127-33283 | Atlas Operating LLC | Dimmit, TXPena Creek (San Miguel 3RD) | ActiveOil | 3,460 | Jun 17, 2005 | — | — |
| Kassner #142-311-33818 | Atlas Operating LLC | McMullen, TXMid-Freddy Hut (Wright) | Shut inOil | 5,725 | Jun 3, 2005 | — | — |
| Pena Creek Unit #9642-127-33279 | Atlas Operating LLC | Dimmit, TXPena Creek (San Miguel 3RD) | ActiveOil | 3,360 | May 24, 2005 | — | — |
| Pena Creek Unit #15942-127-33280 | Atlas Operating LLC | Dimmit, TXPena Creek (San Miguel 3RD) | Shut inOil | 3,360 | May 24, 2005 | — | — |
| Pena Creek Unit #13542-127-33276 | Atlas Operating LLC | Dimmit, TXPena Creek (San Miguel 3RD) | Shut inOil | 3,422 | May 13, 2005 | — | — |
| Middlebrook Unit #242-347-32055 | Atlas Operating LLC | Nacogdoches, TXRaintree (Travis Peak Cons.) | ActiveGas | 13,770 | May 9, 2005 | — | — |
| Hodde A.W. #142-311-33809 | Atlas Operating LLC | McMullen, TXHodde (Wales Sand) | Shut inOil | 5,500 | May 6, 2005 | — | — |
| Pena Creek Unit #13242-127-33274 | Atlas Operating LLC | Dimmit, TXPena Creek (San Miguel 3RD) | ActiveOil | 3,340 | May 4, 2005 | — | — |
| Goldsmith J. B. #1142-499-00782 | Atlas Operating LLC | Wood, TXQuitman | ActiveOil | 6,129 | Apr 18, 2005 | — | — |
| Lovell III #3RHZ42-225-31047 | Atlas Operating LLC | Houston, TXDecker Switch (Pettit) | ActiveGas | 10,256 | Apr 14, 2005 | — | — |
| Johnson O.B. #1 D42-423-31932 | Atlas Operating LLC | Smith, TXChapel Hill (Cotton Valley) | Temporarily abandonedGas | 11,680 | Mar 24, 2005 | — | — |
| Hidalgo-Willacy #542-215-31973 | Atlas Operating LLC | Hidalgo, TXTexan Gardens-Tabasco N. (Cons) | Temporarily abandonedGas | 9,150 | Mar 4, 2005 | — | — |
| Hidalgo-Willacy #742-215-31974 | Atlas Operating LLC | Hidalgo, TXTexan Gardens-Tabasco N. (Cons) | ActiveGas | 9,250 | Mar 4, 2005 | — | — |
| Kleinschmidt #1HZ42-225-31045 | Atlas Operating LLC | Houston, TXDecker Switch (Pettit) | ActiveGas | 10,516 | Mar 4, 2005 | — | — |
| I.P. Farms #2 U42-039-32889 | Atlas Operating LLC | Brazoria, TXChocolate Bayou ( Frio P) | Temporarily abandonedGas | 11,275 | Feb 15, 2005 | — | — |
| Wagner Gas Unit #2 HHZ42-123-32014 | Atlas Operating LLC | De Witt, TXKawitt (Edwards) | Temporarily abandonedGas | 14,079 | Feb 11, 2005 | — | — |
| Rudman #1HZ42-225-31043 | Atlas Operating LLC | Houston, TXDecker Switch (Pettit) | ActiveGas | 10,236 | Feb 9, 2005 | — | — |
| Gilliam I.E. #1D42-423-31907 | Atlas Operating LLC | Smith, TXChapel Hill (Cotton Valley) | Shut inOil | 11,533 | Feb 4, 2005 | — | — |
| Paluxy Gas Unit #442-423-30712 | Atlas Operating LLC | Smith, TXChapel Hill (Paluxy) | Temporarily abandonedGas | 8,800 | Jan 27, 2005 | — | — |
| Bonner #542-161-33185 | Atlas Operating LLC | Freestone, TXLoper (Bossier) | ActiveGas | 12,200 | Jan 21, 2005 | — | — |
| Reinecke Unit #108W42-033-00900 | Atlas Operating LLC | Borden, TXReinecke | PluggedOil | 7,182 | Jan 7, 2005 | — | — |
| TXL 15 #142-353-32860 | Atlas Operating LLC | Nolan, TXE. A. (Cook Sand) | Shut inOil | 4,204 | Dec 2, 2004 | — | — |
| Bennett Mills Estate Fee #7042-047-32174 | Atlas Operating LLC | Brooks, TXMills Bennett (Consolidated) | ActiveOil | 5,101 | Nov 16, 2004 | — | — |
| Mills Bennett Estate #7242-047-32175 | Atlas Operating LLC | Brooks, TXMills Bennett (Consolidated) | Temporarily abandonedGas | 6,114 | Nov 12, 2004 | — | — |
| Lovell II #2HZ42-225-31035 | Atlas Operating LLC | Houston, TXDecker Switch (Pettit) | ActiveGas | 9,884 | Nov 12, 2004 | — | — |
| Meyer #842-337-33612 | Atlas Operating LLC | Montague, TXKennedy (Congl. Lower) | Shut inOil | 7,247 | Nov 1, 2004 | — | — |
| Steinmann #2HHZ42-123-31839 | Atlas Operating LLC | De Witt, TXYoakum (Edwards) | ActiveGas | 14,410 | Oct 27, 2004 | — | — |