Document

Exhibit 22.1

List of Guarantor Subsidiaries and Affiliate Securities Pledged as Collateral

As of the date hereof, the Senior Secured First Lien Notes due 2028 (the “Notes”) issued by Valaris Limited, a Bermuda exempted company (“Valaris”), are fully and unconditionally guaranteed by each of the following subsidiaries of Valaris (the “Guarantors”).


Guarantor						State or Other Jurisdiction of Incorporation or Organization
Alpha Achiever Company						Cayman Islands
Alpha Admiral Company						Cayman Islands
Alpha Archer Company						Cayman Islands
Alpha Aurora Company						Cayman Islands
Alpha Offshore Drilling Services Company						Cayman Islands
Alpha Orca Company						Cayman Islands
Alpha South Pacific Holding Company						Cayman Islands
Atlantic Maritime Services LLC						Delaware (USA)
Atwood Australian Waters Drilling Pty Limited						Australia
Atwood Oceanics Australia Pty Limited						Australia
Atwood Oceanics Pacific Limited						Cayman Islands
Atwood Offshore Drilling Limited						Hong Kong
Atwood Offshore Worldwide Limited						Cayman Islands
ENSCO (Barbados) Limited						Cayman Islands
Ensco (Myanmar) Limited						Myanmar
ENSCO Arabia Co. Ltd.						Saudi Arabia
ENSCO Asia Company LLC						Texas (USA)
ENSCO Asia Pacific Pte. Limited						Singapore
Ensco Associates Company						Cayman Islands
ENSCO Australia Pty. Limited						Australia
ENSCO Capital Limited						Cayman Islands / United Kingdom
ENSCO Corporate Resources LLC						Delaware (USA)
Ensco Deepwater Drilling Limited						England and Wales (UK)
ENSCO Deepwater USA II LLC						Delaware (USA)
ENSCO Development Limited						Cayman Islands
Ensco do Brasil Petróleo e Gás Ltda.						Brazil
Ensco Drilling I Ltd.						Cayman Islands
ENSCO Drilling Mexico LLC						Delaware (USA)
Ensco Endeavors Limited						Cayman Islands / United Kingdom
ENSCO Global GmbH						Switzerland
Ensco Global II Ltd.						Cayman Islands
ENSCO Global Investments LP						England and Wales (UK)
Ensco Global IV Ltd						British Virgin Islands
ENSCO Global Limited						Cayman Islands / United Kingdom
ENSCO Global Resources Limited						England and Wales (UK)
Ensco Holdco Limited						England and Wales (UK)
ENSCO Holding Company						Delaware (USA)
Ensco Holdings I Ltd.						Cayman Islands
Ensco Incorporated						Texas (USA)
Ensco Intercontinental GmbH						Switzerland
ENSCO International Incorporated						Delaware (USA)
Ensco International Ltd.						British Virgin Islands / United Kingdom
ENSCO Investments LLC						Nevada (USA) / United Kingdom
Ensco Jersey Finance Limited						Jersey / United Kingdom
ENSCO Limited						Cayman Islands

Exhibit 22.1


Ensco Management Corp						British Virgin Islands
ENSCO Maritime Limited						Bermuda
Ensco Mexico Services S.de R.L.						Mexico
Ensco Ocean 2 Company						Cayman Islands
ENSCO Oceanics LLC						Delaware (USA)
ENSCO Oceanics International Company						Cayman Islands
ENSCO Offshore Company						Delaware (USA)
ENSCO Offshore International Company						Cayman Islands
ENSCO Offshore International Holdings Limited						Cayman Islands / United Kingdom
ENSCO Offshore International Inc.						Marshall Islands
Ensco Offshore International LLC						Delaware (USA)
Ensco Offshore Petróleo e Gás Ltda.						Brazil
ENSCO Offshore U.K. Limited						England and Wales (UK)
ENSCO Overseas Limited						Cayman Islands
ENSCO Services Limited						England and Wales (UK)
Ensco Transcontinental II LP						England and Wales (UK)
Ensco Transnational I Limited						Cayman Islands
Ensco Transnational III Limited						Cayman Islands
ENSCO U.K. Limited						England and Wales (UK)
Ensco UK Drilling Limited						England and Wales (UK)
Ensco Universal Holdings I Ltd.						Cayman Islands / United Kingdom
Ensco Universal Holdings II Ltd.						Cayman Islands / United Kingdom
ENSCO Universal Limited						England and Wales (UK)
Ensco Vistas Limited						Cayman Islands
Ensco Worldwide GmbH						Switzerland
EnscoRowan Ghana Drilling Limited						Ghana
Great White Shark Limited						Gibraltar
Green Turtle Limited						Gibraltar
International Technical Services LLC						Delaware (USA)
Manatee Limited						Malta
Manta Ray Limited						Malta
Marine Blue Limited						Gibraltar
Offshore Drilling Services LLC						Delaware (USA)
Pacific Offshore Labor Company						Cayman Islands
Petroleum International Pte. Ltd.						Singapore
Pride Global II Ltd						British Virgin Islands
Pride International LLC						Delaware (USA)
Pride International Management Co. LP						Texas (USA)
Ralph Coffman Cayman Limited						Cayman
Ralph Coffman Limited						Gibraltar
Ralph Coffman Luxembourg S.à r.l.						Luxembourg
RCI International, Inc.						Cayman Islands
RD International Services Pte. Ltd.						Singapore
RDC Arabia Drilling, Inc.						Cayman Islands
RDC Holdings Luxembourg S.à r.l.						Luxembourg
RDC Malta Limited						Malta
RDC Offshore Luxembourg S.à r.l.						Luxembourg
RDC Offshore Malta Limited						Malta
RoCal Cayman Limited						Cayman Islands
Rowan 240C#3, Inc.						Cayman Islands
Rowan Companies Limited						England and Wales (UK)
Rowan Companies, LLC						Delaware (USA)
Rowan Drilling (Gibraltar) Limited						Gibraltar

Exhibit 22.1


Rowan Drilling (Trinidad) Limited						Cayman Islands
Rowan Drilling (U.K.) Limited						Scotland (UK)
Rowan Drilling Services Limited						Gibraltar
Rowan Financial Holdings S.à r.l.						Luxembourg
Rowan International Rig Holdings S.à r.l.						Luxembourg
Rowan Marine Services LLC						Texas (USA)
Rowan N-Class (Gibraltar) Limited						Gibraltar
Rowan No. 1 Limited						England and Wales (UK)
Rowan No. 2 Limited						England and Wales (UK)
Rowan Norway Limited						Gibraltar
Rowan Offshore (Gibraltar) Limited						Gibraltar
Rowan Offshore Luxembourg S.à r.l.						Luxembourg
Rowan Rigs S.à r.l.						Luxembourg
Rowan S. de R.L. de C.V.						Mexico
Rowan Services LLC						Delaware (USA)
Rowan US Holdings (Gibraltar) Limited						Gibraltar
Rowandrill, LLC						Texas (USA)
Valaris Holdco 1 Limited						Bermuda
Valaris Holdco 2 Limited						Bermuda
Valaris United LLC						Delaware (USA)

Concurrently with the issuance of the Notes, Valaris and certain of its subsidiaries entered into pledge and collateral agreements. Pursuant to the terms of these agreements, the Notes are secured on a first-priority basis by a pledge of the equity interests of the Guarantors and affiliates listed below.

Affiliate Pledgee

Class of Security

Percentage Pledged

Alpha Achiever Company

Ordinary Shares

100.00%

Alpha Admiral Company

Ordinary Shares

100.00%

Alpha Archer Company

Ordinary Shares

100.00%

Alpha Aurora Company

Ordinary Shares

100.00%

Alpha Falcon Drilling Company

Ordinary Shares; Class A Shares

100.00%

Alpha Int’l Drilling Company S.à r.l

Ordinary Shares

100.00%

Alpha Mako Company

Ordinary Shares

100.00%

Alpha Manta Company

Ordinary Shares

100.00%

Alpha Offshore Drilling (S) Pte Ltd.

Ordinary Shares

100.00%

Alpha Offshore Drilling Services Company

Ordinary Shares

100.00%

Alpha Offshore International Leasing Limited

Ordinary Shares

100.00%

Alpha Orca Company

Ordinary Shares

100.00%

Alpha South Pacific Holding Company

Ordinary Shares

100.00%

Atlantic Maritime Services LLC

Units

100.00%

Atwood Advantage S.à r.l.

Ordinary Shares

100.00%

Atwood Beacon S.à r.l.

Ordinary Shares

100.00%

Atwood Drilling LLC

Ordinary Shares

100.00%

Atwood Hunter LLC

Ordinary Shares

100.00%

Atwood Malta Holding Company Limited

Class A Shares

> 99.00%

Atwood Oceanics Drilling Mexico S. de R.L. de C.V.

Partnership Interest

99.00%

Atwood Oceanics Global Limited

Ordinary Shares

100.00%

Atwood Oceanics Pacific Limited

Ordinary Shares; Class A Shares

100.00%

Exhibit 22.1

Atwood Offshore Labor Company

Ordinary Shares

100.00%

Atwood Offshore Worldwide Limited

Ordinary Shares; Class A Shares

64.12%

Drillquest Offshore Company

Ordinary Shares

100.00%

ENSCO (Barbados) Limited

Ordinary Shares

100.00%

ENSCO (Bermuda) Limited

Ordinary Shares

100.00%

Ensco (Myanmar) Limited

Ordinary Shares

100.00%

Ensco (Thailand) Limited

Ordinary Shares

100.00%

ENSCO Arabia Company Limited

Percentage Ownership Interest

100.00%

Ensco Asia Company LLC

Units

100.00%

Ensco Asia Pacific Pte. Limited

Ordinary Shares

100.00%

Ensco Associates Company

Ordinary Shares

100.00%

ENSCO Australia Pty Limited

Ordinary Shares

100.00%

Ensco Capital Limited

Ordinary Shares

100.00%

Ensco Corporate Resources LLC

Ordinary Shares

100.00%

ENSCO de Venezuela, S.R.L.

Ordinary Shares

100.00%

ENSCO Deepwater Drilling Limited

Ordinary Shares

100.00%

Ensco Deepwater USA II LLC

Non-Assessable Member Units

100.00%

Ensco do Brasil Petróleo e Gás Ltda.

Quotas

100.00%

ENSCO Drilling (Caribbean), Inc.

Ordinary Shares

100.00%

Ensco Drilling Company (Nigeria) Limited

Ordinary Shares

100.00%

ENSCO Drilling Company LLC

Ordinary Shares

100.00%

Ensco Drilling I Ltd.

Ordinary Shares

100.00%

ENSCO Drilling Mexico LLC

Units

100.00%

Ensco Endeavors Limited

Ordinary Shares

100.00%

ENSCO Gerudi (M) Sdn. Bhd.

Ordinary Shares

49.00%

ENSCO Global GmbH

Percentage Ownership Interest

100.00%

Ensco Global II Ltd.

Ordinary Shares

100.00%

ENSCO Global Investment LP

Partnership Interests

95.00%

ENSCO Global IV Ltd.

100.00%

Ensco Global Limited

Ordinary Shares

100.00%

Ensco Global Resources Limited

Ordinary Shares

100.00%

Ensco Holdco Limited

Ordinary Shares

100.00%

ENSCO Holding Company

100.00%

Ensco Holdings I Ltd.

Ordinary Shares

100.00%

Ensco Holland B.V.

Ordinary Shares

100.00%

ENSCO Incorporated

Common Stock

100.00%

ENSCO Intercontinental GmbH

Percentage Ownership Interest

100.00%

Ensco International Incorporated

Common Stock

100.00%

Ensco International Ltd.

Ordinary Shares

100.00%

Ensco Investments LLC

Ordinary Shares

100.00%

ENSCO Labuan Limited

Ordinary Shares

100.00%

ENSCO Limited

Ordinary Shares

100.00%

ENSCO Maritime Limited

Ordinary Shares

100.00%

Ensco Mexico Services, S. de R.L. de C.V.

Partnership Interests

100.00%

Ensco North America LLC

Percentage Ownership Interest

100.00%

ENSCO Ocean 1 Company

Ordinary Shares

88.29%

ENSCO Ocean 2 Company

Ordinary Shares

100.00%

ENSCO Oceanics Company LLC

Units

100.00%

Ensco Oceanics International Company

Ordinary Shares

100.00%

Ensco Offshore Company

Ordinary Shares

100.00%

ENSCO Offshore International Company

Ordinary Shares

100.00%

Exhibit 22.1

ENSCO Offshore International Holdings Limited

Ordinary Shares

100.00%

ENSCO Offshore International Inc.

Registered Shares

100.00%

Ensco Offshore International LLC

Percentage Ownership Interest

100.00%

Ensco Offshore Petróleo e Gás Ltda.

Quotas

100.00%

Ensco Offshore Services LLC

Units

100.00%

ENSCO Offshore U.K. Limited

Ordinary Shares

100.00%

ENSCO Overseas Limited

Ordinary Shares

100.00%

Ensco Services Limited

Ordinary Shares

100.00%

ENSCO Services LLC

Units

100.00%

Ensco South Pacific LLC

Percentage Ownership Interest

100.00%

Ensco Transcontinental I LLC

Ordinary Shares

100.00%

Ensco Transcontinental II LLC

Ordinary Shares

100.00%

Ensco Transnational I Ltd.

Ordinary Share

100.00%

Ensco Transnational II Ltd.

Ordinary Share

100.00%

Ensco Transnational III Ltd.

Ordinary Share

100.00%

Ensco Transnational Limited

Ordinary Shares

100.00%

ENSCO U.K. Limited

Ordinary Shares

100.00%

Ensco UK Drilling Limited

Ordinary Shares

100.00%

Ensco Universal Holdings I Ltd.

Ordinary Shares

100.00%

ENSCO Universal Holdings II Ltd.

Ordinary Shares

6.25%

ENSCO Universal Limited

Ordinary Shares

100.00%

Ensco Vistas Limited

Ordinary Shares

100.00%

ENSCO Worldwide GmbH

Ordinary Shares

100.00%

Ensco Worldwide Holdings Ltd.

Ordinary Shares

100.00%

Forasub B.V.

Ordinary Shares

100.00%

Great White Shark Limited

Ordinary Shares

100.00%

Green Turtle Limited

Ordinary Shares

100.00%

Manatee Limited

Ordinary Shares

100.00%

Manta Ray Limited

Ordinary Shares

100.00%

Offshore Drilling Services LLC

Units

100.00%

P.T. ENSCO Sarida Offshore

Ordinary Shares

49.00%

Pride Arabia Co. Ltd.

Ordinary Shares

25.00%

Pride Global II Ltd.

100.00%

Pride Global Offshore Nigeria Limited

Ordinary Shares

100.00%

Pride International LLC

100.00%

Ralph Coffman Cayman Limited

N/A (Uncertificated)

100.00%

Ralph Coffman Luxembourg S.à r.l.

Percentage Ownership Interests

100.00%

RD International Services Pte. Ltd.

100.00%

RDC Arabia Drilling, Inc.

Ordinary Shares

100.00%

RDC Holdings Luxembourg S.à r.l.

Percentage Ownership Interest

100.00%

RDC Malta Limited

Ordinary Shares

100.00%

RDC Offshore Luxembourg S.à r.l.

Percentage Ownership Interest

100.00%

RDC Offshore Malta Limited

Percentage Ownership Interest

100.00%

Rowan Angola Limitada

Percentage Ownership Interest

100.00%

Rowan California S.à r.l.

Percentage Ownership Interest

100.00%

Rowan Deepwater Drilling (Gibraltar) Limited

Ordinary Shares

100.00%

Exhibit 22.1

Rowan do Brasil Servicos de Perfuracao Ltda.

Percentage Ownership Interest

> 99.00%

Rowan Drilling (Gibraltar) Limited

Ordinary Shares

100.00%

Rowan Drilling (Trinidad) Limited

Ordinary Shares

100.00%

Rowan Drilling (U.K.) Limited

Ordinary Shares

100.00%

Rowan Drilling Cyprus Limited

Ordinary Shares

100.00%

Rowan Drilling Services Limited

Ordinary Shares

100.00%

Rowan Drilling Services Nigeria Limited

Ordinary Shares

100.00%

Rowan Egypt Petroleum Services L.L.C.

Quotas

50.00%

Rowan Finanz S.à r.l.

Percentage Ownership Interest

100.00%

ROWAN Global Drilling Services Limited

Ordinary Shares

100.00%

Rowan Holdings Luxembourg S.à r.l.

Percentage Ownership Interest

100.00%

Rowan International Rig Holdings S.à r.l.

Ordinary Shares

100.00%

Rowan Marine Services LLC

LLC Interests

100.00%

Rowan Middle East, Inc.

100.00%

Rowan N-Class (Gibraltar) Limited

Ordinary Shares

100.00%

Rowan No. 2 Limited

100.00%

Rowan North Sea, Inc.

Ordinary Shares

100.00%

Rowan Norway Limited (FKA Rowan (Gibraltar) Limited)

Ordinary Shares

100.00%

Rowan Offshore (Gibraltar) Limited

Ordinary Shares

100.00%

Rowan Offshore Luxembourg S.à r.l.

100.00%

Rowan Relentless Luxembourg S.à r.l.

Percentage Ownership Interest

100.00%

Rowan Reliance Luxembourg S.à r.l.

Percentage Ownership Interest

100.00%

Rowan Renaissance Luxembourg S.à r.l.

Percentage Ownership Interest

100.00%

Rowan Resolute Luxembourg S.à r.l.

Percentage Ownership Interest

100.00%

Rowan Rex Limited (Cayman)

Ordinary Shares

100.00%

Rowan Rigs S.à r.l.

Percentage Ownership Interest

100.00%

Rowan Services LLC

Percentage Ownership Interest

100.00%

Rowan Standard Ghana Limited

Ordinary Shares

49.00%

Rowan US Holdings (Gibraltar) Limited

Ordinary Shares

73.86%

Rowan, S. de R.L. de C.V.

Social Part

99.00%

Rowandrill Labuan Limited

Ordinary Shares

100.00%

Rowandrill Malaysia Sdn. Bhd.

Ordinary Shares

49.00%

Swiftdrill Offshore Drilling Services Company

Ordinary Shares

100.00%

Valaris Holdco 1 Limited

Ordinary Shares

100.00%

Valaris Holdco 2 Limited

Ordinary Shares

100.00%

Valaris United LLC

100.00%