Metso Corporation Company Release April 17, 2008 at 2.30 p.m. Metso Corporation has been informed about a change in the holding of the mutual funds managed by UBS AG of the paid up share capital of Metso Corporation. On April 15, 2008 UBS AG's (CH-270.3.004.646-4/) group holding in shares of Metso Corporation exceeded the 5% threshold. The holding amounted to 7,274,140 shares, which corresponds to 5.13 percent of the paid up share capital and votes in Metso Corporation. According to UBS AG's announcement, this position is held at the following UBS entities: UBS AG, UBS Fund Management (Switzerland) AG, UBS Global Asset Management (Deutschland) GmbH, UBS Global Asset Management Life Limited, UBS Global Asset Management (UK) Limited, UBS AG London Branch, UBS AG (Switzerland), UBS Securities LLC, UBS Financial Services Inc. Metso is a global engineering and technology corporation with 2007 net sales of over EUR 6 billion. Its almost 27,000 employees in approximately 50 countries serve customers in the pulp and paper industry, rock and minerals processing, the energy industry and selected other industries. www.metso.com For further information for investors, please contact: Johanna Sintonen, Vice President, Investor Relations, Metso Corporation, tel. +358 204 84 3253 Leipäteksti Metso Corporation Olli Vaartimo Executive Vice President and CFO Kati Renvall Vice President, Corporate Communications distribution: OMX Nordic Exchange in Helsinki Media www.metso.com