Acergy S.A. announces anti-trust clearance from relevant US and Norwegian authorities regarding the proposed combination of Acergy S.A and Subsea 7 Inc.

London, England - September 28, 2010 - Acergy S.A.

(NASDAQ-GS: ACGY; Oslo Stock Exchange: ACY) today

announced that anti-trust clearance has been granted

from the relevant US and Norwegian authorities.

On August 9, 2010 Acergy S.A. and Subsea 7 Inc.

submitted their respective applications to the US

Federal Trade Commission and the Anti-trust Division

of the US Department of Justice. On September 8,

2010, the waiting period in connection with the

application was terminated, at which point the

Combination was cleared by the relevant US

authorities.

On September 6, 2010, Acergy S.A. and Subsea 7 Inc.

submitted a notification to the Norwegian Competition

Authority. On September 28, 2010 unconditional

clearance was issued.

Completion is currently anticipated for January 2011

subject to shareholder approvals and other customary

completion conditions, as outlined in the prospectus

dated September 21, 2010.

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Acergy S.A. is a seabed-to-surface engineering and

construction contractor to the offshore oil and gas

industry worldwide. We provide integrated services,

and we plan, design and deliver complex projects in

harsh and challenging environments.

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Contact:

Karen Menzel

Acergy S.A.

+44 (0)20 8210 5568

www.acergy-group.com

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