Ahlstrom's Extraordinary Shareholders' Meeting to be held on November 27, 2012

Ahlstrom Corporation STOCK EXCHANGE RELEASE September 20, 2012 at 15.15

Not to be distributed in or into Australia, Canada, the Hong Kong special administrative region of the People's Republic of China, Japan, New Zealand, South Africa or the United States.

Ahlstrom, a global high performance materials company, will hold an Extraordinary Shareholders' Meeting on November 27, 2012. The Extraordinary Shareholders' Meeting will decide on the planned two partial demergers of Ahlstrom Corporation in relation to the combination of Ahlstrom Group's Label and Processing business and Munksjö AB that was announced on August 28, 2012.

The notice to the Extraordinary Shareholders' Meeting will be published in October 2012.

For more information, please contact:

Liisa Nyyssönen
Vice President, Communications
Tel. +358 10 888 4757

Ahlstrom in brief
Ahlstrom is a high performance 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, wallcoverings, flooring, labels and food packaging. We have a leading market position in the businesses in which we operate. Our 5,200 employees serve customers in 28 countries on six continents. In 2011, Ahlstrom's net sales amounted to EUR 1.6 billion. The company's share is quoted on the NASDAQ OMX Helsinki. More information is available at www.ahlstrom.com.