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10-K - 10-K - ATWOOD OCEANICS INCatw-2016930x10k.htm
EX-32.2 - EXHIBIT 32.2 - ATWOOD OCEANICS INCex322-cfo906certification2.htm
EX-32.1 - EXHIBIT 32.1 - ATWOOD OCEANICS INCex321-ceo906certification2.htm
EX-31.2 - EXHIBIT 31.2 - ATWOOD OCEANICS INCex312-cfocertification2016.htm
EX-31.1 - EXHIBIT 31.1 - ATWOOD OCEANICS INCex311-ceocertification2016.htm
EX-23 - EXHIBIT 23 - ATWOOD OCEANICS INCex2320160930-10kpwcconsent.htm
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 Archer 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.a.r.l.
Luxembourg
100%
Alpha Mako Company
Cayman Islands
100%
Alpha Leasing Drilling Limited
Mauritius
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 (Ghana) Ltd.
Ghana
100%
Alpha Offshore International Leasing Limited
UK
100%
Alpha Offshore Singapore Supply Company Pte. Ltd.
Singapore
100%
Alpha Orca Company
Cayman Islands
100%
Alpha Osprey Company
Cayman Islands
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 Advantage S.á r.l.
Luxembourg
100%
Atwood Australian Waters Drilling Pty. Ltd.
Western Australia
100%
Atwood Beacon S.á r.l.
Luxembourg
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 (M) Sdn. Bhd.
Malaysia
100%
Atwood Oceanics Australia Pty. Ltd.
Western Australia
100%
Atwood Oceanics Drilling Mexico S. de R.L. de C.V
Mexico
100%
Atwood Oceanics Global Limited
Cayman Islands
100%
Atwood Oceanics International Limited
Cayman Islands
100%
Atwood Oceanics Leasing Ltd.
Malaysia
100%



Atwood Oceanics Malta Ltd.
Malta
100%
Atwood Oceanics Management, Inc.
Delaware
100%
Atwood Oceanics Pacific Limited
Cayman Islands
100%
Atwood Oceanics Services Mexico,S.de R.L. de C.V
Mexico
100%
Atwood Offshore (Gibraltar) Limited
Gibraltar
100%
Atwood Offshore (Gibraltar) Advantage Limited
Gibraltar
100%
Atwood Offshore (Gibraltar) Beacon Limited
Gibraltar
100%
Atwood Offshore Drilling Ltd.
Hong Kong
100%
Atwood Offshore Labor Company
Cayman Islands
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%