Ahlstrom Corporation STOCK EXCHANGE RELEASE March 3, 2015 at 14.15 Ahlstrom has sold Munksjö shares worth EUR 14.1 million Ahlstrom, a global high performance fiber-based materials company, has today sold 1,500,000 shares in Munksjö Oyj for approximately EUR 14.1 million. Ahlstrom will book a capital gain of approximately EUR 6 million from the transaction in its first-quarter 2015 financial accounts. Following the sale of shares, Ahlstrom's shareholding in Munksjö is 3,300,981 shares, representing 6.46% of the total shares and votes. For more information, please contact: Liisa Nyyssönen VP, Communications Tel. +358 10 888 4757 Ahlstrom in brief Ahlstrom is a high performance fiber-based materials company, partnering with leading businesses around the world to help them stay ahead. We aim to grow with a product offering for clean and healthy environment. Our materials are used in everyday applications such as filters, medical fabrics, life science and diagnostics, wallcoverings and food packaging. In 2014, Ahlstrom's net sales amounted to EUR 1 billion. Our 3,400 employees serve customers in 22 countries. Ahlstrom's share is quoted on the NASDAQ OMX Helsinki. More information available at www.ahlstrom.com. [HUG#1899043]