Document
Exhibit 21.1
| SUBSIDIARIES OF THE REGISTRANT | |||||
| Valaris Limited Subsidiaries as of December 31, 2025 | |||||
| Company Name | Jurisdiction | ||||
| Alpha Achiever Company S.à r.l. | Luxembourg | ||||
| Alpha Admiral Company S.à r.l. | Luxembourg | ||||
| Alpha Archer Company S.à r.l. | Luxembourg | ||||
| Alpha International Drilling Company S.à r.l. | Luxembourg | ||||
| Alpha Leasing Drilling Limited | Mauritius | ||||
| Alpha Offshore Drilling Services Company | Cayman Islands | ||||
| Alpha Offshore Drilling Services Company (Ghana) Limited | Ghana | ||||
| Alpha Orca Company S.à r.l. | Luxembourg | ||||
| ATLANTIC MARITIME SERVICES LLC | Delaware | ||||
| Atwood Advantage S.à r.l. | Luxembourg | ||||
| Atwood Australian Waters Drilling Pty Ltd | Western Australia | ||||
| Atwood Beacon S.à r.l. | Luxembourg | ||||
| Atwood Oceanics (M) Sdn. Bhd. | Malaysia | ||||
| Atwood Oceanics Leasing Limited | Labuan FT | ||||
| Atwood Offshore Drilling Limited | Hong Kong | ||||
| Atwood Offshore Worldwide Limited | Cayman Islands | ||||
| Aurora Offshore Services Gmbh | Germany | ||||
| C.A. Foravep, Forasol Venezuela de Perforaciones | Venezuela | ||||
| Clearways Offshore Drilling Sdn. Bhd. | Malaysia | ||||
| Drillquest Offshore Company | Cayman Islands | ||||
| Durand Maritime S.A.S. | France | ||||
| ENSCO (Bermuda) Limited | Bermuda | ||||
| Ensco (Myanmar) Limited | Republic of Myanmar | ||||
| Ensco (Thailand) Limited | Thailand | ||||
| ENSCO Arabia Company Limited | Saudi Arabia | ||||
| ENSCO Asia Company LLC | Texas | ||||
| ENSCO Asia Pacific Pte. Limited | Singapore | ||||
| ENSCO Australia Pty. Limited | Western Australia | ||||
| ENSCO Corporate Resources LLC | Delaware | ||||
| ENSCO de Venezuela, S.R.L. | Venezuela | ||||
| Ensco Deepwater Drilling Limited | England and Wales | ||||
| Ensco Deepwater USA II LLC | Delaware | ||||
| Ensco do Brasil Petróleo e Gás Ltda. | Brazil | ||||
| ENSCO Drilling Company (Nigeria) Ltd. | Nigeria | ||||
| Ensco Endeavors Limited | Cayman Islands | ||||
| Ensco France S.A.S. | France | ||||
| ENSCO Gerudi (M) Sdn. Bhd. | Malaysia | ||||
| ENSCO Global GmbH | Switzerland | ||||
| Ensco Global II Ltd. | Cayman Islands | ||||
| Ensco Holdco Limited | England and Wales | ||||
| ENSCO Holding Company | Delaware | ||||
| ENSCO Holland B.V. | Netherlands | ||||
| ENSCO Incorporated | Texas | ||||
| Ensco Intercontinental GmbH | Switzerland | ||||
| ENSCO International Incorporated | Delaware | ||||
| Ensco International Management GP LLC | Delaware | ||||
| Ensco International Management LP LLC | Delaware | ||||
| ENSCO Investments LLC | Nevada | ||||
| ENSCO Labuan Limited | Labuan FT | ||||
| Ensco Mexico Services, S. de R.L. de C.V. | Mexico | ||||
| Ensco Ocean 1 Company | Cayman Islands | ||||
| Ensco Ocean 2 Company | Cayman Islands | ||||
| ENSCO Oceanics Company LLC | Delaware | ||||
Exhibit 21.1
| ENSCO Oceanics International Company | Cayman Islands | ||||
| ENSCO Offshore International S.à r.l. | Luxembourg | ||||
| Ensco Offshore International Company S.à r.l. | Luxembourg | ||||
| Ensco Offshore International LLC | Delaware | ||||
| ENSCO Offshore International Holdings Limited | Cayman Islands | ||||
| ENSCO Offshore LLC | Delaware | ||||
| Ensco Offshore Petróleo e Gás Ltda. | Brazil | ||||
| ENSCO Offshore U.K. Limited | England and Wales | ||||
| ENSCO Overseas Limited | Cayman Islands | ||||
| ENSCO Services Limited | England and Wales | ||||
| ENSCO Services LLC | Delaware | ||||
| Ensco Transcontinental I LLC | Nevada | ||||
| Ensco Transcontinental I LP | England and Wales | ||||
| Ensco Transcontinental II LLC | Nevada | ||||
| Ensco Transcontinental II LP | England and Wales | ||||
| ENSCO U.K. Limited | England and Wales | ||||
| Ensco U.K. Limited (Australia PE) | England and Wales | ||||
| Ensco UK Drilling Limited | England and Wales | ||||
| Ensco Universal Holdings II Ltd. | Cayman Islands | ||||
| ENSCO Universal Limited | England and Wales | ||||
| Ensco Vistas Limited | Cayman Islands | ||||
| ENSCO Worldwide GmbH | Switzerland | ||||
| EnscoRowan Ghana Drilling Limited | Ghana | ||||
| Forasub B.V. | Netherlands | ||||
| Forinter Limited | Jersey | ||||
| Great White Shark Limited | Gibraltar | ||||
| Green Turtle S.à r.l. | Luxembourg | ||||
| International Technical Services LLC | Delaware | ||||
| Marine Blue Limited | Gibraltar | ||||
| Mukamala Oil Field Services Limited | Saudi Arabia | ||||
| Ocean Deep Drilling ESV Nigeria Limited | Nigeria | ||||
| Offshore Drilling Services LLC | Delaware | ||||
| P.T. ENSCO Sarida Offshore | Indonesia | ||||
| Petroleum International Pte. Ltd. | Singapore | ||||
| Pride Arabia Co. Ltd. | Saudi Arabia | ||||
| Pride Foramer (Sucursal de Angola) | Angola | ||||
| Pride Foramer S.A.S. | France | ||||
| Pride Forasol Drilling Nigeria Ltd. | Nigeria | ||||
| Pride Forasol S.A.S. | France | ||||
| Pride Global II Ltd. | British Virgin Islands | ||||
| Pride Global Offshore Nigeria Limited | Nigeria | ||||
| Pride International LLC | Delaware | ||||
| Pride International Management Company LP | Texas | ||||
| PT Alpha Offshore Drilling | Indonesia | ||||
| PT Pentawood Offshore Drilling | Indonesia | ||||
| Ralph Coffman Limited | Gibraltar | ||||
| Ralph Coffman Luxembourg S.à r.l. | Luxembourg | ||||
| RD International Services Pte. Ltd. | Singapore | ||||
| RDC Arabia Drilling, Inc. | Cayman Islands | ||||
| RDC Holdings Luxembourg S.à r.l. | Luxembourg | ||||
| Rowan 350 Slot Rigs, LLC | Delaware | ||||
| Rowan Angola Limitada | Angola | ||||
| Rowan Companies, LLC | Delaware | ||||
| Rowan Deepwater Drilling (Gibraltar) Limited | Gibraltar | ||||
| Rowan Drilling (Gibraltar) Limited (Indonesia PE) | Indonesia | ||||
| Rowan Drilling (U.K.) Limited | Scotland | ||||
| Rowan Drilling Cyprus Limited | Cyprus | ||||
| Rowan Drilling Services Limited | Gibraltar | ||||
Exhibit 21.1
| Rowan Drilling Services Nigeria Limited | Nigeria | ||||
| Rowan Drilling S.à r.l. | Luxembourg | ||||
| Rowan Egypt Petroleum Services L.L.C. | Egypt | ||||
| Rowan Financial Holdings S.à r.l. | Luxembourg | ||||
| Rowan Global Drilling Services Limited | Gibraltar | ||||
| Rowan Holdings Luxembourg S.à r.l. | Luxembourg | ||||
| Rowan International Rig Holdings S.à r.l. | Luxembourg | ||||
| Rowan Marine Services, LLC | Texas | ||||
| Rowan N-Class (Gibraltar) Limited | Gibraltar | ||||
| Rowan Norway Limited (FKA Rowan (Gibraltar) Limited) | Gibraltar | ||||
| Rowan Offshore Luxembourg S.à r.l. | Luxembourg | ||||
| Rowan Offshore S.à r.l. | Luxembourg | ||||
| Rowan Rex S.à r.l. | Luxembourg | ||||
| Rowan Rigs S.à r.l. | Luxembourg | ||||
| Rowan Services LLC | Delaware | ||||
| Rowan Standard Ghana Limited | Ghana | ||||
| Rowan US Holdings (Gibraltar) Limited | Gibraltar | ||||
| Rowan, S. de R.L. de C.V. | Mexico | ||||
| Rowandrill Labuan Limited | Labuan | ||||
| Rowandrill Malaysia Sdn. Bhd. | Malaysia | ||||
| Rowandrill, LLC | Texas | ||||
| Saudi Aramco Rowan Offshore Drilling Company | Saudi Arabia | ||||
| SKDP 1 Limited | Cyprus | ||||
| SKDP 2 Limited | Cyprus | ||||
| SKDP 3 Limited | Cyprus | ||||
| Societe Maritime de Services "SOMASER" S.A.S. | France | ||||
| Sonamer Angola Ltd. | Bahamas | ||||
| Sonamer Drilling International Limited | Bahamas | ||||
| Sonamer Limited | Bahamas | ||||
| Sonamer Perfuracoes Ltd, (Sucursal em Angola) | Angola | ||||
| Valaris Finance Company LLC | Delaware | ||||
| Valaris Ghana Drilling Ltd. | Ghana | ||||
| Valaris Holdco 1 Limited | Bermuda | ||||
| Valaris Holdco 2 Limited | Bermuda | ||||
| Valaris Tenerife SL | Spain | ||||
| Valaris United LLC | Delaware | ||||