EX-21.1 3 atw-9302012xex211subsidiar.htm LIST OF SUBSIDIARIES ATW-9.30.2012-Ex 21.1 Subsidiary List

EXHIBIT 21.1

ATWOOD OCEANICS, INC.
SUBSIDIARY AND AFFILIATED COMPANIES, STATE OR
JURISDICTION OF INCORPORATION AND OWNERSHIP PERCENTAGE

 
 
 
Alpha Achiever Company
Cayman Islands
100
%
Alpha Admiral Company
Cayman Islands
100
%
Alpha Advantage Company
Cayman Islands
100
%
Alpha Aurora Company
Cayman Islands
100
%
Alpha Beacon Company
Cayman Islands
100
%
Alpha Condor Company
Cayman Islands
100
%
Alpha Falcon Company
Cayman Islands
100
%
Alpha Falcon Drilling Company
Cayman Islands
100
%
Alpha Hunter Company
Cayman Islands
100
%
Alpha International Drilling Company S.à.r.l.
Luxembourg
100
%
Alpha Leasing Drilling Limited
Mauritius
100
%
Alpha Mako Company
Cayman Islands
100
%
Alpha Manta Company
Cayman Islands
100
%
Alpha Offshore Drilling (Cambodia) Ltd
Cambodia
100
%
Alpha Offshore Drilling (S) Pte. Ltd.
Singapore
100
%
Alpha Offshore Drilling Services Company
Cayman Islands
100
%
Alpha Offshore Drilling Services Company, Limited
Angola
100
%
Alpha Offshore Drilling Services Company (Ghana) Ltd.
Ghana
100
%
Alpha Offshore International Leasing Limited
UK
100
%
Alpha Offshore Mexico Company, S. de. R.L. de C.V.    
Mexico
100
%
Alpha Offshore Mexico Labor Company, S. de. R.L. de C.V.
Mexico
100
%
Alpha Offshore Singapore Supply Company Pte. Ltd.    
Singapore
100
%
Alpha Orca Company
Cayman Islands
100
%
Alpha Osprey Company
Cayman Islands
100
%
Alpha Seahawk Company    
Cayman Islands
100
%
Alpha Singapore Supply Company Pte. Ltd.
Singapore
100
%
Alpha South Pacific Holding Company
Western Australia
100
%
Alpha Southern Cross Pty. Ltd.
Western Australia
100
%
Alpha Vicksburg Pty. Ltd.
Western Australia
100
%
Atwood Australian Waters Drilling Pty. Ltd.
Western Australia
100
%
Atwood Deep Seas, Ltd.    
Texas
100
%
Atwood Drilling, Inc
Delaware
100
%
Atwood Hunter Co.
Delaware
100
%
Atwood Malta Holding Company Limited
Malta
100
%
Atwood Oceanics Australia Pty. Ltd.
Western Australia
100
%
Atwood Oceanics Global Limited
Cayman Islands
100
%
Atwood Oceanics International Limited
Cayman Islands
100
%


Atwood Oceanics Leasing Ltd.
Malaysia
100
%
Atwood Oceanics (M) Sdn. Bhd.
Malaysia
100
%
Atwood Oceanics Malta Ltd.
Malta
100
%
Atwood Oceanics Management, Inc.
Delaware
100
%
Atwood Oceanics (NZ) Limited
New Zealand
100
%
Atwood Oceanics Pacific Limited
Cayman Islands
100
%
Atwood Offshore Drilling Limited
Hong Kong
100
%
Atwood Offshore (Gibraltar) Limited
Gibraltar
100
%
Atwood Offshore Worldwide Limited
Cayman Islands
100
%
Atwood Serviços de Perfuração Ltda.
Brazil
100
%
Aurora Offshore Services GmbH
Germany
100
%
Clearways Offshore Drilling Sdn. Bhd.
Malaysia
49
%
Drillquest International Offshore Drilling Services Company
Cayman Islands
100
%
Drillquest Offshore Company
Cayman Islands
100
%
Pacific Offshore Labor Company
Cayman Islands
100
%
PT Alpha Offshore Drilling
Indonesia
100
%
PT Pentawood Offshore Drilling
Indonesia
80
%
Swiftdrill, Inc.
Cayman Islands
100
%
Swiftdrill Malta
Malta
100
%
Swiftdrill Nigeria Limited
Nigeria
60
%
Swiftdrill Offshore Drilling Services Company
Cayman Islands
100
%