Wärtsilä’s Interim Report January-March 2013 to be published 18 April 2013 at 8.30 a.m. local time

Wärtsilä Corporation, Stock exchange release 4 April 2013 at 14:30 UTC+2

Wärtsilä Corporation will publish its Interim Report for the period January-March on Thursday 18 April 2013 at 8.30 a.m. Finnish time. The report will be available in pdf-format and in a web-based report system at www.wartsilareports.com as well as on the company website at www.wartsila.com after publishing.

An analyst and press conference will be held on the same date, Thursday 18 April 2013, at 10.00 a.m. Finnish time (8.00 a.m. UK time), at the Wärtsilä headquarters in Helsinki, Finland. The combined web- and teleconference will be held in English and can be viewed on the internet at the following address: http://wcc.webeventservices.com/r.htm?e=604978&s=1&k=EA232CDE570D7B4382BEDAEE6F9DE426.

To participate in the teleconference please register at the following address; http://emea.directeventreg.com/registration/32537292. You will receive dial-in details by e-mail once you have registered. If problems occur, please press *0 for operator assistance. Please and use *6 to mute the sounds from your phone during the teleconference and the same code to unmute.

An on-demand version of the webcast will be available on the company website later the same day.