Ahlstrom Corporation STOCK EXCHANGE RELEASE May 17, 2013 at 18.17

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 leader in high performance fiber-based materials, publishes carve-out financial information for 2012 and first-quarter of 2013 with respect to Ahlstrom's Label and Processing business in Europe and Brazil.

This previously unpublished information is included in Munksjö Oyj's prospectus, consisting of a registration document and a summary and securities note (together the Prospectus), related to the listing of Munksjö Oyj shares in connection with the combination of Ahlstrom's Label and Processing businesses in Europe with Munksjö AB.

The Finnish language Prospectus approved by the Finnish Financial Supervisory Authority as well as the English language translation will be available on Ahlstrom's website at www.ahlstrom.com/en/munksjotransaction and on the website of Munksjö Oyj at www.munksjo.com on  May 20, 2013 at the latest.

On May 13, 2013, Munksjö Oyj submitted a listing application to the Helsinki Stock Exchange (NASDAQ OMX Helsinki Ltd) for the listing of the company's shares on the official list of the Helsinki Stock Exchange. The trading in Munksjö's shares is expected to commence on Friday, June 7, 2013, under the trading symbol MUNK1, provided that the completion of the transaction in Europe has taken place.

Ahlstrom announced on August 28, 2012, the transaction between Ahlstrom and EQT concerning the combination of Ahlstrom's Label and Processing business and Munksjö AB. The execution of the transaction involves the demergers of Ahlstrom's Label and Processing businesses in Europe (LP Europe) and Brazil (Coated Specialties) into Munksjö Oyj, the new company established in Finland for these purposes. In these demergers, Ahlstrom's shareholders will receive newly issued shares of Munksjö as contribution.

The LP Europe completion is expected to take place on or before May 27, 2013, provided that the relevant competition clearances, e.g. from the European Commission and Brazil, are obtained prior to that. The Coated Specialties completion is expected to take place in the second half of 2013.

The Prospectus contains the following previously unpublished information related to Ahlstrom (terms used in this document will have the meanings assigned to them in the Prospectus):

Carve-out financial information

The Prospectus contains carve-out financial information with respect to Ahlstrom's Label and Processing business in Europe and Brazil derived from the Ahlstrom Group's consolidated financial statements. These carve-out financial statements have been prepared in accordance with IFRS under consideration of the principles for determining which assets and liabilities, income and expenses as well as cash flows are to be assigned to LP Europe and Coated Specialties as described in the notes to the carve-out financial statements. The carve-out financial information to be disclosed in the Prospectus includes the following:

1. LP Europe's unaudited interim report for the three month period ended March 31, 2013;

2. LP Europe's audited carve-out financial statements as at and for the year ended December 31, 2012;

3. Coated Specialties' unaudited interim report for the three month period ended March 31, 2012;

4. Coated Specialties' audited carve-out financial statements as at and for the year ended December 31, 2012.

Appendix 1 and 2: LP Europe carve-out financial information as pdf.

Appendix 3 and 4: Coated Specialties carve-out financial information as pdf.

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.

Disclaimer
This document may not 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. The information contained herein shall not constitute an offer to sell or the solicitation of an offer to buy the securities referred to herein in any jurisdiction in which such offer, solicitation or sale would be unlawful prior to registration, exemption from registration or qualification under the securities laws of any such jurisdiction.  
This document is not an offer for sale of securities in the United States. Securities may not be offered or sold in the United States absent registration or an exemption from registration under the U.S. Securities Act of 1933, as amended. Ahlstrom Corporation, Munksjö AB and Munksjö Corporation have not registered, and do not intend to register, any offering of the Munksjö shares in the United States. There will be no public offering of the Munksjö shares in the United States. This document is only being distributed to and is only directed at (i) persons who are outside the United Kingdom or (ii) to investment professionals falling within Article 19(5) of the Financial Services and Markets Act 2000 (Financial Promotion) Order 2005 (the "Order") or (iii) high net worth companies, and other persons to whom it may lawfully be communicated, falling within Article 49(2)(a) to (d) of the Order or (iv) persons who are members or creditors of the company to which this communication relates, falling within article 43(2) of the Order (all such persons in (i), (ii) (iii) and (iv) above together being referred to as "relevant persons"). Any investment activity to which this document relates will be only available to and will be engaged in only with, relevant persons. Any person who is not a relevant person should not act or rely on this document or any of its contents.