Vestas Wind Systems — Director's Dealing 2010

May 7, 2010

Finanstilsynet (The Danish Financial Supervisory Authority) Gl. Kongevej 74 A 1850 Frederiksberg C Denmark

Randers, 7 May 2010 Insiders' trading - announcement No. 5/2010 Page 1 of 1

Announcement of Vestas Executives' trading with securities

In accordance with section 28 a of the Danish Securities Trading Act, Vestas Wind Systems A/S is required to publish information regarding trading in Vestas Wind Systems A/S shares and securities by Executives and persons closely associated with an Executive.

The statement is based on a report which Vestas Wind Systems A/S has received from one of the Executives on 7 May 2010.

Name:	Søren Lomholt Husted
Position of Executive:	President of Vestas Nacelles
Issuer:	Vestas Wind Systems A/S
ID code:	DK0010268606
Type of securities:	Shares
Type of transaction:	Purchase (exercise of share options)
Date of trading:	5 May 2010
Place of transaction:	NASDAQ OMX Copenhagen
Number of securities traded:	2,550
Market value (DKK) of securities traded:	DKK 376,380.00
Name: Position of Executive:	Søren Lomholt Husted President of Vestas Nacelles
Issuer:	Vestas Wind Systems A/S
ID code:	DK0010268606
Type of securities:	Shares
Type of transaction:	Sale
Date of trading:	7 May 2010
Place of transaction:	NASDAQ OMX Copenhagen
Number of securities traded:	2,550

Any questions may be addressed to the Executive Management at Vestas Wind Systems A/S, telephone +45 9730 0000.

Yours sincerely Vestas Wind Systems A/S

Ditlev Engel President and CEO