| Herrera Gregorio #842-311-33686 | Atlas Operating LLC | McMullen, TXSan Miguel Creek (Wilcox Cons.) | Shut inOil | 6,100 | Mar 10, 2003 | — | — |
| Swanson #142-481-34522 | Atlas Operating LLC | Wharton, TXDuke (6200) | ActiveGas | 6,310 | Mar 3, 2003 | — | — |
| Herrera Gregorio et al #342-311-32568 | Atlas Operating LLC | McMullen, TXSan Miguel Creek (Wilcox Cons.) | ActiveOil | 6,100 | Feb 27, 2003 | — | — |
| East Pena Creek Unit #5242-127-33196 | Atlas Operating LLC | Dimmit, TXPena Creek (San Miguel 3RD) | Shut inOil | 3,500 | Feb 21, 2003 | — | — |
| South Pena Creek Unit #47342-127-33195 | Atlas Operating LLC | Dimmit, TXPena Creek (San Miguel 3RD) | Shut inOil | 3,420 | Feb 13, 2003 | — | — |
| South Pena Creek Unit #47042-127-33194 | Atlas Operating LLC | Dimmit, TXPena Creek (San Miguel 3RD) | Shut inOil | 3,427 | Feb 10, 2003 | — | — |
| Stump A. F. #142-357-00257 | Atlas Operating LLC | Ochiltree, TXFarnsworth (Morrow Upper) | ActiveGas | 8,601 | Feb 10, 2003 | — | — |
| Pena Creek Unit #7642-127-33191 | Atlas Operating LLC | Dimmit, TXPena Creek (San Miguel 3RD) | ActiveOil | 3,306 | Jan 23, 2003 | — | — |
| South Pena Creek Unit #47142-127-33192 | Atlas Operating LLC | Dimmit, TXPena Creek (San Miguel 3RD) | ActiveOil | 3,410 | Jan 23, 2003 | — | — |
| South Pena Creek Unit #47242-127-33193 | Atlas Operating LLC | Dimmit, TXPena Creek (San Miguel 3RD) | Shut inOil | 3,340 | Jan 23, 2003 | — | — |
| Edinburg Improvement Association #542-215-31994 | Atlas Operating LLC | Hidalgo, TXTexan Gardens-Tabasco N. (Cons) | Temporarily abandonedGas | 11,100 | Dec 5, 2002 | — | — |
| White-Blalock Unit #542-499-30246 | Atlas Operating LLC | Wood, TXQuitman | Shut inOil | 8,274 | Oct 24, 2002 | — | — |
| Cree Sykes Unit #90642-399-34595 | Atlas Operating LLC | Runnels, TXCree-Sykes (Gardner Upper) | PluggedOil | 5,300 | Oct 22, 2002 | — | — |
| Cree Sykes Unit #803542-399-34581 | Atlas Operating LLC | Runnels, TXCree-Sykes (Gardner Upper) | PluggedOil | 5,700 | Oct 17, 2002 | — | — |
| Hidlago - Willacy #3A42-215-31655 | Atlas Operating LLC | Hidalgo, TXTexan Gardens-Tabasco N. (Cons) | ActiveGas | 8,745 | Sep 20, 2002 | — | — |
| Garcia E. #1 C42-215-30917 | Atlas Operating LLC | Hidalgo, TXTexan Gardens-Tabasco N. (Cons) | Shut inGas | 10,021 | Sep 6, 2002 | — | — |
| Williams #142-289-31367 | Atlas Operating LLC | Leon, TXBranton (Rodessa) | ActiveGas | 8,590 | Aug 30, 2002 | — | — |
| Hidalgo Willacy #15B42-215-32108 | Atlas Operating LLC | Hidalgo, TXTexan Gardens-Tabasco N. (Cons) | ActiveGas | 9,310 | Aug 15, 2002 | — | — |
| Wallace Bilby #90142-263-00720 | Atlas Operating LLC | Kent, TXClairemont (Penn. Lower) | Shut inOil | 6,742 | Mar 11, 2002 | — | — |
| Martindale Unit a-15 #1HZ42-241-30687 | Atlas Operating LLC | Jasper, TXBrookeland (Austin Chalk 8800) | ActiveGas | 10,510 | Feb 19, 2002 | — | — |
| Nolan D Fee #342-353-00481 | Atlas Operating LLC | Nolan, TXHylton NW. (Cambrian) | Shut inOil | 6,090 | Feb 11, 2002 | — | — |
| Roane Minnie #142-353-32771 | Atlas Operating LLC | Nolan, TXHylton NW. (Breckenridge) | PluggedOil | 6,900 | Jan 22, 2002 | — | — |
| South Pena Creek Unit #49842-127-33181 | Atlas Operating LLC | Dimmit, TXPena Creek (San Miguel 3RD) | Shut inOil | 3,400 | Sep 24, 2001 | — | — |
| South Pena Creek Unit #49942-127-33182 | Atlas Operating LLC | Dimmit, TXPena Creek (San Miguel 3RD) | Shut inOil | 3,410 | Sep 24, 2001 | — | — |
| Vastar Fee Unit a-109 #1HZ42-241-30684 | Atlas Operating LLC | Jasper, TXBrookeland (Austin Chalk 8800) | ActiveGas | 10,510 | Sep 17, 2001 | — | — |
| South Pena Creek Unit #44342-127-30543 | Atlas Operating LLC | Dimmit, TXPena Creek (San Miguel 3RD) | Shut inOil | 3,275 | Aug 2, 2001 | — | — |
| Webb #242-127-30524 | Atlas Operating LLC | Dimmit, TXPena Creek (San Miguel 2ND) | Shut inOil | 3,280 | Jun 8, 2001 | — | — |
| Reinecke Unit #75W42-033-00251 | Atlas Operating LLC | Borden, TXReinecke | ActiveInjection | 6,820 | May 9, 2001 | — | — |
| South Pena Creek Unit #49742-127-33178 | Atlas Operating LLC | Dimmit, TXPena Creek (San Miguel 3RD) | ActiveOil | 3,400 | Apr 27, 2001 | — | — |
| Santos-Lewis GU #142-321-31878 | Atlas Operating LLC | Matagorda, TXDuncan Slough (Frio Cons.) | ActiveGas | 11,800 | Apr 27, 2001 | — | — |
| Montgomery J.R. Gas Unit #142-289-30400 | Atlas Operating LLC | Leon, TXJewett (Pettit) | ActiveGas | 10,610 | Apr 26, 2001 | — | — |
| Cree Sykes Unit #90342-399-34570 | Atlas Operating LLC | Runnels, TXCree-Sykes (Gardner Upper) | Shut inOil | 5,486 | Apr 9, 2001 | — | — |
| Vastar Fee Unit a-15 #1HZ42-241-30681 | Atlas Operating LLC | Jasper, TXBrookeland (Austin Chalk 8800) | ActiveGas | 12,361 | Mar 22, 2001 | — | — |
| Flowers Lois #642-211-32493 | Atlas Operating LLC | Hemphill, TXHemphill (Granite Wash.) | Temporarily abandonedGas | 10,950 | Mar 16, 2001 | — | — |
| Gilliam #242-423-30870 | Atlas Operating LLC | Smith, TXChapel Hill (Travis Peak) | Temporarily abandonedGas | 8,533 | Mar 15, 2001 | — | — |
| South Pena Creek Unit #49642-127-33176 | Atlas Operating LLC | Dimmit, TXPena Creek (San Miguel 3RD) | ActiveOil | 3,400 | Mar 13, 2001 | — | — |
| South Pena Creek Unit #49542-127-33177 | Atlas Operating LLC | Dimmit, TXPena Creek (San Miguel 3RD) | ActiveOil | 3,300 | Mar 13, 2001 | — | — |
| Hanks Billie a #3842-353-32728 | Atlas Operating LLC | Nolan, TXWildcat | PluggedOil | 6,400 | Mar 2, 2001 | — | — |
| Flowers #104042-211-32494 | Atlas Operating LLC | Hemphill, TXHemphill (Granite Wash.) | Temporarily abandonedGas | 10,658 | Jan 26, 2001 | — | — |
| Helmcamp #142-289-30075 | Atlas Operating LLC | Leon, TXJewett (Pettit) | ActiveGas | 10,307 | Jan 26, 2001 | — | — |
| Champion Int L. Unit a-1148 #2HZ42-351-30711 | Atlas Operating LLC | Newton, TXBrookeland (Austin Chalk 8800) | ActiveOil | 11,502 | Dec 20, 2000 | — | — |
| Montgomery J. R. #242-289-31338 | Atlas Operating LLC | Leon, TXJewett (Travis Peak) | ActiveGas | 10,595 | Nov 1, 2000 | — | — |
| Hidalgo - Willacy #6 B42-215-31715 | Atlas Operating LLC | Hidalgo, TXTexan Gardens-Tabasco N. (Cons) | ActiveGas | 9,414 | Oct 18, 2000 | — | — |
| Hidalgo-Willacy #7B42-215-31728 | Atlas Operating LLC | Hidalgo, TXTexan Gardens-Tabasco N. (Cons) | ActiveGas | 9,105 | Oct 18, 2000 | — | — |
| Hobbs Unit a-19 #1HZ42-351-30708 | Atlas Operating LLC | Newton, TXBrookeland (Austin Chalk 8800) | ActiveOil | 8,880 | Oct 17, 2000 | — | — |
| Bennett Mills Estate Fee #6542-047-31905 | Atlas Operating LLC | Brooks, TXMills Bennett (Consolidated) | Temporarily abandonedGas | 4,534 | Oct 5, 2000 | — | — |
| Hidalgo Willacy #5B42-215-31713 | Atlas Operating LLC | Hidalgo, TXTexan Gardens-Tabasco N. (Cons) | ActiveGas | 9,626 | Sep 13, 2000 | — | — |
| Corby #2 Gas Unit #242-289-31333 | Atlas Operating LLC | Leon, TXLac (Rodessa) | ActiveGas | 7,998 | Sep 11, 2000 | — | — |
| Phillips GU #1 #342-213-30808 | Atlas Operating LLC | Henderson, TXMalakoff South (Travis Peak) | ActiveGas | 8,288 | Aug 22, 2000 | — | — |
| Goldsmith-Landreth/San Andres/UT #298W42-135-30722 | Atlas Operating LLC | Ector, TXGoldsmith | PluggedOil | 4,000 | Jul 19, 2000 | — | — |