Vestas Wind Systems — Major Shareholding Notification 2018

May 3, 2018

Vestas.

Company announcement from Vestas Wind Systems A/S

Aarhus, 3 May 2018

Company announcement No. 21/2018

Page 1 of 1

Major shareholder announcement – Vestas Wind Systems A/S

In accordance with section 31 of the Danish Capital Markets Act, Vestas Wind Systems A/S (Vestas) discloses that at 3 May 2018, Vestas holds, through direct holdings, 5,207,666 shares in Vestas, corresponding to 2.5 percent of the shares in Vestas.

Contact details

Vestas Wind Systems A/S, Denmark

Patrik Setterberg, Vice President

Investor Relations

Tel: +45 6122 1913

Vestas Wind Systems A/S

Hedeager 42, 8200 Aarhus N, Denmark

Tel: +45 9730 0000, vestas@vestas.com, www.vestas.com

Company Reg. No.: 10 40 37 82

Company Reg. Name: Vestas Wind Systems A/S