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

Ahlstrom Corporation STOCK EXCHANGE RELEASE 19.10.2011 at 13.15

Pursuant to Chapter 2, Section 9 of the Securities Market Act, Ahlstrom Corporation has received an announcement from Mr Erkki Etola, dated October 19, 2011, regarding a change in the shareholding of said shareholder.

According to the announcement, Erkki Etola's shareholding in Ahlstrom Corporation has on October 18, 2011, fallen below 5 % (1/20) of the share capital and voting rights of Ahlstrom Corporation. Erkki Etola now owns 2,300,000 shares of Ahlstrom Corporation, which represent 4.93% 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 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, wallcovers, wipes, flooring, labels and food packaging. We have a leading market position in the businesses in which we operate. Our 5,700 employees serve customers in 26 countries on six continents. In 2010, Ahlstrom's net sales amounted to EUR 1.9 billion. The company's share is quoted on the NASDAQ OMX Helsinki. More information is available at www.ahlstrom.com.