Ahlstrom - Company Announcement

Updated determination of acquisition costs of Ahlstrom and Munksjö shares for Finnish taxation

Ahlstrom Corporation STOCK EXCHANGE RELEASE December 17, 2013 at 11.20

Ahlstrom's Label and Processing business in Brazil (Coated Specialties) was
transferred to Munksjö Oyj through a partial demerger, which was registered with
the Finnish Trade Register on December 2, 2013. In Finnish income taxation, part
of the remaining acquisition cost of Ahlstrom shares will be transferred to the
Munksjö shares received as demerger consideration in the Coated Specialties
demerger. The acquisition cost is used for the calculation of capital gains
and/or losses from share transactions for the basis of Finnish taxation.

Based on the average weighted trading prices, the proportion of the fair values
of Munksjö shares received as demerger consideration in the Coated Specialties
demerger and Ahlstrom shares do not differ significantly from the proportion of
net assets of Coated Specialties and the total net assets of Ahlstrom. Thus, the
acquisition cost of Ahlstrom's shares is divided based on the proportion of net
assets at the effective date of the demerger. Coated Specialties' transferred
net assets were 4.8% of the total net assets of Ahlstrom.

Ahlstrom's shareholders received as demerger consideration 0.265 Munksjö shares
for each one share held in Ahlstrom prior to the completion of the Coated
Specialties demerger. After the demerger of LP Europe on May 27, 2013, 4.8% of
the remaining acquisition cost of each Ahlstrom share will be transferred to an
acquisition cost per 0.265 Munksjö share.

Theoretical example:

For an Ahlstrom shareholder who has prior (May 24, 2013, at the latest) to the
completion of the two demergers purchased 1,000 Ahlstrom shares at a total price
of EUR 10,000 (EUR 10 per share), the acquisition cost of the shares is EUR
8,870 following the completion of LP Europe demerger on May 27, 2013. (EUR
1,130 or 11.3% of the original acquisition cost was transferred to the 250
Munksjö shares received as demerger consideration in the LP Europe demerger.)

Following the Coated Specialties demerger, 4.8%, or EUR 425.76, of the EUR
8,870 acquisition cost will be transferred to the 265 Munksjö Oyj shares
received in the demerger. This equals to EUR 1.61 per received Munksjö share.
Therefore the acquisition cost of 1,000 Ahlstrom shares remaining following both
demergers is EUR 8,444.24 or EUR 8.44 per share.

This does not apply to Ahlstrom or Munksjö shareholders residing permanently
outside of Finland. Shareholders who are tax resident outside of Finland are
recommended to contact their tax advisors or local tax office regarding the
split of the acquisition cost in taxation.

For more information, please contact:
Juho Erkheikki
Manager, Financial Communications & Investor Relations
Tel. +358 10 888 4731

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 24 countries. Ahlstrom's share is quoted on the NASDAQ OMX
Helsinki. More information available at www.ahlstrom.com.


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