ATP Oil & Gas (ATPG)

Item 2.01 Completion of Acquisition or Disposition of Assets.

On September 21, 2005, the Company acquired all of BP’s 55% working interest in four federal oil and gas leases covering Mississippi Canyon Blocks 173/217 and Desoto Canyon Blocks 133/177, offshore Gulf of Mexico, an oil and gas discovery area named “King’s Peak.” The Company will operate this field which includes two producing subsea wells, in addition to proved undeveloped, probable and possible reserves, and all of BP’s interest (19.25%) in the Canyon Express Pipeline System (“CEPS”). CEPS is a 56-mile pipeline system operated by TotalFinaElf that gathers production from King’s Peak and two other fields. Consideration paid in cash at closing, after closing adjustments, was $18.6 million.

Item 2.01 — Completion of Acquisition or Disposition of Assets.

On September 21, 2005, ATP Oil & Gas Corporation (the “Company”) acquired all of BP Exploration & Production Inc.’s (“BP”) 55% working interest in four federal oil and gas leases covering Mississippi Canyon Blocks 173/217 and Desoto Canyon Blocks 133/177, offshore Gulf of Mexico, an oil and gas discovery area named “King’s Peak.” ATP will operate this field which includes two producing subsea wells, in addition to proved undeveloped, probable and possible reserves, and all of BP’s interest (19.25%) in the Canyon Express Pipeline System (“CEPS”). CEPS is a 56 mile pipeline system operated by TotalFinaElf that gathers production from King’s Peak and two other fields. Consideration paid in cash at closing, after closing adjustments, was $18.6 million.