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

Ahlstrom Corporation STOCK EXCHANGE ANNOUNCEMENT 29.4.2008
 
Pursuant to Chapter 2, Section 9 of the Securities Market Act,
Ahlstrom Corporation has received an announcement from Vilha
Intressenter Ab  dated April 28, 2008  regarding a change in the
shareholding of said shareholder.
 
According to the announcement, Vilha Intressenter Ab's shareholding
in Ahlstrom Corporation has on April 28, 2008 exceeded 5 % (1/20) of
the share capital and voting rights of Ahlstrom Corporation. Vilha
Intressenter Ab now owns 2,336,312 shares of Ahlstrom Corporation,
which represent 5.01 % 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.
 
Ahlstrom Corporation
 
For further information, please contact:
 
Jaana Klinga, Director, Assistant General Counsel, tel. +358 10 888
4743
 
 
Distribution:
OMX Nordic Exchange Helsinki
Main media
www.ahlstrom.com
 
Ahlstrom in brief
 
Ahlstrom is a global leader in the development, manufacture and
marketing of high performance fiber-based materials. Nonwovens and
specialty papers, made by Ahlstrom, are used in a large variety of
everyday products, such as filters, wipes, flooring, labels, and
tapes. Based upon its unique fiber expertise and innovative approach,
the company has a strong market position in several business areas in
which it operates. Ahlstrom's 6,500 employees serve customers via
sales offices and production facilities in more than 20 countries on
six continents. In 2007, Ahlstrom's net sales amounted to EUR 1.8
billion. Ahlstrom's share is listed on the OMX Nordic Exchange
Helsinki. The company website is www.ahlstrom.com.