Stock Exchange release December 18, 2012 03:45:00 PM CET

Announcement pursuant to the Securties Market Act (chapter 2, section 10) regarding a change in shareholding

Metso Corporation's stock exchange release on December 18, 2012 at 4.45 p.m. local time

Metso Corporation has received an announcement pursuant to the Securities Market Act regarding a change in shareholding within the Cevian funds. Cevian Capital II Master Fund L.P. has transferred its aggregate holding of 12,508,060 Metso shares to Cevian Capital Partners Ltd, which is a wholly-owned subsidiary of Cevian Capital II Master Fund L.P.

As of December 18, Cevian Capital Partners Ltd. holds a total of 12,508,060 shares which corresponds to 8.32% of Metso shares. The transfer does not have any impact on the total amount of shares held by Cevian. The registered number of shares of Metso Corporation is 150,348,256, which entitle to a total of 150,348,256 votes.

Metso is a global supplier of technology and services to customers in the process industries, including mining, construction, pulp and paper, power, and oil and gas. Our 30,000 professionals based in over 50 countries deliver sustainability and profitability to customers worldwide. Expect results.

www.metso.com, www.twitter.com/metsogroup

Further information:

Juha Rouhiainen, VP, Investor Relations, Metso Corporation, tel. +358 20 484 3253

Metso Corporation

Harri Nikunen

CFO

Juha Rouhiainen

VP, Investor Relations

Distribution:

NASDAQ OMX Helsinki Ltd

Media

www.metso.com