Notification in accordance with the Finnish Securities Market Act Chapter 2 § 9: Changes in Investor AB's ownership in Wärtsilä

Wärtsilä Corporation Company announcement 13.12.2012 at 16.30 EET Wärtsilä has today been informed of the following change in ownership of Investor AB; Investor AB's subsidiary Aktiebolaget Navigare has on 13.12.2012 transferred all of its Wärtsilä shares to Instoria Aktiebolaget, a total of 17,306,978 shares corresponding to 8.77% of the share capital and votes. Instoria Aktiebolaget is also a wholly owned subsidiary of Investor AB. The joint ownership of Fiskars Group and Investor AB in Wärtsilä Corporation has not changed or reached a flagging notification limit. This announcement is distributed by Thomson Reuters on behalf of Thomson Reuters clients. The owner of this announcement warrants that: (i) the releases contained herein are protected by copyright and other applicable laws; and (ii) they are solely responsible for the content, accuracy and originality of the information contained therein. Source: Wärtsilä Oyj Abp via Thomson Reuters ONE [HUG#1664733]