Company:  ATP OIL & GAS CORP (ATPAQ)
Form Type:  S-3
Filing Date:  3/29/2012 
CIK:  0001123647 
Address:  4600 POST OAK PL
STE 200 
City, State, Zip:  HOUSTON, Texas 77027 
Telephone:  (713) 622-3311 
Fiscal Year:  12/31 
Last Trade
Last Trade: 
$0.08   		Change: 
0.00 (0.00%)  
Trade Time: 
May 17   		Market Cap: 
$4.12M
Description of Business
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  FORM S-3
    CALCULATION OF REGISTRATION FEE
    THE OFFERING
    SUBJECT TO COMPLETION, DATED MARCH 28, 2012
    ABOUT THIS PROSPECTUS
    TABLE OF CONTENTS
    A WARNING ABOUT FORWARD-LOOKING STATEMENTS
    WHERE YOU CAN FIND MORE INFORMATION
    RISK FACTORS
    RATIO OF EARNINGS TO FIXED CHARGES AND RATIO OF EARNINGS TO ...
    USE OF PROCEEDS
    DESCRIPTION OF DEBT SECURITIES
    Limitations on Certain Sale and Leaseback Transactions
    DESCRIPTION OF CAPITAL STOCK
    DESCRIPTION OF PREFERRED STOCK
    DESCRIPTION OF WARRANTS
    DESCRIPTION OF UNITS
    CERTAIN U.S. FEDERAL INCOME AND ESTATE TAX CONSIDERATIONS TO
    SELLING SHAREHOLDERS
    PLAN OF DISTRIBUTION
    LEGAL MATTERS
    EXPERTS
    PART II
      ITEM 14. OTHER EXPENSES OF ISSUANCE AND DISTRIBUTION
      ITEM 15. INDEMNIFICATION OF DIRECTORS AND OFFICERS
      ITEM 16. EXHIBITS.
      ITEM 17. UNDERTAKINGS.
    SIGNATURES
  EXHIBIT 4.1
  EXHIBIT 4.2
  EXHIBIT 5.1
  EXHIBIT 12.1
    RATIO COMPUTATION
  EXHIBIT 23.1
    CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
  EXHIBIT 23.2
    CONSENT OF INDEPENDENT PETROLEUM ENGINEERS
  EXHIBIT 23.3
    CONSENT OF INDEPENDENT PETROLEUM ENGINEERS
  EXHIBIT 25.1
  EXHIBIT 25.2
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