Ahlstrom - Total number of voting rights and capital

Ahlstrom shares subscribed with option rights

Ahlstrom Corporation STOCK EXCHANGE ANNOUNCEMENT 22.5.2007

A total of 62,611 new shares of Ahlstrom Corporation have been
subscribed with option rights under the company's stock option
programs I (2001) and II (2001). A corresponding increase of EUR
93,916.50 in Ahlstrom's share capital has been entered in the Trade
Register today.

After the increase, the total number of Ahlstrom Corporation shares
is 46,670,608 and the share capital amounts to EUR 70,005,912.00.

The shares will be traded on the Helsinki Stock Exchange as old
shares as of May 23, 2007.

Ahlstrom Corporation

Gustav Adlercreutz
Senior Vice President, Administration and General Counsel


Distribution:
Helsinki Stock Exchange
Main media
www.ahlstrom.com


For further information, please contact:
Gustav Adlercreutz, Ahlstrom Corporation, tel +358 10 888 4727.


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 5,700 employees serve customers via
sales offices and production facilities in more than 20 countries on
six continents. In 2006, Ahlstrom's net sales amounted to EUR 1.6
billion. Ahlstrom's share is listed on the Helsinki Stock Exchange.
The company website is www.ahlstrom.com.