Ahlstrom's announcement under Securities Markets Act (chapter 2, section 10) regarding a change in shareholding

Ahlstrom Corporation STOCK EXCHANGE RELEASE February 14, 2013 at 08.45

Ahlstrom Corporation has received an announcement from Vimpu Intressenter Ab, dated February 13, 2013, regarding a change in the shareholding of the said shareholder.

According to the announcement, Vimpu Intressenter's shareholding in Ahlstrom Corporation has on February 13, 2013, exceeded 10% (1/10) of the share capital and voting rights. Vimpu Intressenter now owns 4,695,000 shares of Ahlstrom Corporation, which represents 10.06% of the share capital and voting rights of Ahlstrom Corporation.

Ahlstrom's share capital consists of 46,670,608 shares, each entitling to one vote.

For more information, please contact:
Liisa Nyyssönen
Vice President, 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. Our products are used in a large variety of everyday applications, such as filters, medical gowns and drapes, diagnostics, wallcoverings, flooring and food packaging. We have a leading market position in the businesses in which we operate. In 2012, Ahlstrom's net sales from the continuing operations (excluding Label and Processing business) amounted to EUR 1 billion. Our 3,800 employees serve customers in 28 countries on six continents. Ahlstrom's share is quoted on the NASDAQ OMX Helsinki. More information available at www.ahlstrom.com.