Stora Enso Oyj Stock Exchange Release 21 May 2007 at 11.30 GMT Stora Enso is investing EUR 25 million in a new copy paper sheeter, two packaging lines and a new machine hall at its Veitsiluoto fine paper mill in Finland. The project, which will increase mill specialisation within the division, is scheduled to start in June 2007 and be completed within a year. This investment in line with Stora Enso's fine paper strategy will increase the mill's copy paper sheet cutting capacity by about 140 000 tonnes to 510 000 tonnes per year, making it Europe's biggest copy paper sheeting plant. The production capacity of the mill will be virtually unchanged. As already announced, envelope paper production will be transferred from Veitsiluoto Mill to Varkaus Mill in 2008, allowing Veitsiluoto Mill to focus on copy paper under the Group's mill specialisation programme. The new investment will enable the Group to react faster to European market growth. For further information, please contact: Juha Vanhainen, SVP, Stora Enso Fine Paper, Office Papers, +358 40 541 8178 Jarkko Tehomaa, General Manager, Stora Enso Veitsiluoto Mill, tel. +358 2046 34301 Kari Vainio, EVP, Corporate Communications, tel. +44 7799 348 197 Keith B Russell, SVP, Investor Relations, tel. +44 7775 788 659 Ulla Paajanen-Sainio, VP, Investor Relations and Financial Communications, tel. +358 2046 21242 Previous press releases concerning Stora Enso's activities of copy paper in Finland are available at www.storaenso.com/press - 28 December 2006: Stora Enso is rebuilding a paper machine at Varkaus Mill to improve mill efficiency www.storaenso.com www.storaenso.com/investors STORA ENSO OYJ Jussi Siitonen Jukka Marttila