Munksjö Oyj - Other information disclosed according to the rules of the Exchange

Supplement to the merger prospectus

MUNKSJÖ OYJ, STOCK EXCHANGE RELEASE 2 February 2017 at 15:00 CET
Helsinki, Finland

This stock exchange release may not be published or distributed, in whole or in
part, directly or indirectly, in or into Canada, Australia, Hong Kong, South
Africa, Japan or any other country where such publication or distribution would
violate applicable laws or rules or would require additional documents to be
completed or registered or require any measure to be undertaken, in addition to
the requirements under Finnish law. For further information, see “Important
notice” below.

Supplement to the merger prospectus

Munksjö Oyj (“Munksjö”) has supplemented the merger prospectus dated December
16, 2016. The Finnish Financial Supervisory Authority has on February 2, 2017
approved the supplement to the merger prospectus, which relates to the
publication by Ahlstrom Corporation of its financial statements release 2016 on
January 27, 2017.

The Finnish language merger prospectus and the supplement to the Finnish
language merger prospectus are available on the internet at
www.munksjo.com/ahlstrommunksjo/fin and www.ahlstrom.com/fi/Sijoittajat/
ahlstromin-ja-munksjon-yhdistyminen
 (http://www.ahlstrom.com/fi/Sijoittajat/%20ahlstromin-ja-munksjon
-yhdistyminen%20)as well as at the registered office of Munksjö at
Eteläesplanadi 14, FI-00130 Helsinki, Finland, and at the registered office of
Ahlstrom Corporation at Alvar Aallon katu 3 C, FI-00100 Helsinki, Finland. The
English language merger prospectus, the supplement to the English language
merger prospectus and the supplemented Swedish language summary are available on
the internet at www.munksjo.com/ahlstrommunksjo and
www.ahlstrom.com/en/Investors/ahlstrommunksjo-combination/.

Munksjö Oyj

For further information, please contact

Anna Selberg, SVP Communications, tel. +46 703 23 10 32
Laura Lindholm, Head of Investor Relations, tel. +46 72 703 63 36

IMPORTANT NOTICE

The distribution of this release may be restricted by law and persons into whose
possession any document or other information referred to herein comes should
inform themselves about and observe any such restrictions. The information
contained herein is not for publication or distribution, directly or indirectly,
in or into Canada, Australia, Hong Kong, South Africa or Japan. Any failure to
comply with these restrictions may constitute a violation of the securities laws
of any such jurisdiction. This release is not directed to, and is not intended
for distribution to or use by, any person or entity that is a citizen or
resident or located in any locality, state, country or other jurisdiction where
such distribution, publication, availability or use would be contrary to law or
regulation or which would require any registration or licensing within such
jurisdiction.

This release does not constitute a notice to an extraordinary general meeting or
a merger prospectus and as such, does not constitute or form part of and should
not be construed as, an offer to sell, or the solicitation or invitation of any
offer to buy, acquire or subscribe for, any securities or an inducement to enter
into investment activity. Any decision with respect to the proposed statutory
absorption merger of Ahlstrom Corporation (“Ahlstrom”) into Munksjö (the
“Merger”) should be made solely on the basis of information contained in the
actual notices to the extraordinary general meeting of Munksjö and Ahlstrom, as
applicable, the merger prospectus and the supplement to the merger prospectus
related to the Merger as well as on an independent analysis of the information
contained therein. You should consult the merger prospectus and the supplement
to the merger prospectus for more complete information about Munksjö, Ahlstrom,
their respective subsidiaries, their respective securities and the Merger.

No part of this release, nor the fact of its distribution, should form the basis
of, or be relied on in connection with, any contract or commitment or investment
decision whatsoever. The information contained in this release has not been
independently verified. No representation, warranty or undertaking, expressed or
implied, is made as to, and no reliance should be placed on, the fairness,
accuracy, completeness or correctness of the information or the opinions
contained herein. Neither Munksjö nor Ahlstrom, nor any of their respective
affiliates, advisors or representatives or any other person, shall have any
liability whatsoever (in negligence or otherwise) for any loss however arising
from any use of this release or its contents or otherwise arising in connection
with this release. Each person must rely on their own examination and analysis
of Munksjö, Ahlstrom, their respective subsidiaries, their respective securities
and the Merger, including the merits and risks involved.

This release includes “forward-looking statements.” These statements may not be
based on historical facts, but are statements about future expectations. When
used in this release, the words “aims,” “anticipates,” “assumes,” “believes,”
“could,” “estimates,” “expects,” “intends,” “may,” “plans,” “should,” “will,”
“would” and similar expressions as they relate to Munksjö, Ahlstrom, the Merger
or the combination of the business operations of Munksjö and Ahlstrom identify
certain of these forward-looking statements. Other forward-looking statements
can be identified in the context in which the statements are made. Forward
-looking statements are set forth in a number of places in this release,
including wherever this release include information on the future results, plans
and expectations with regard to the combined company’s business, including its
strategic plans and plans on growth and profitability, and the general economic
conditions. These forward-looking statements are based on present plans,
estimates, projections and expectations and are not guarantees of future
performance. They are based on certain expectations, which, even though they
seem to be reasonable at present, may turn out to be incorrect. Such forward
-looking statements are based on assumptions and are subject to various risks
and uncertainties. Shareholders should not rely on these forward-looking
statements. Numerous factors may cause the actual results of operations or
financial condition of the combined company to differ materially from those
expressed or implied in the forward-looking statements. Neither Munksjö nor
Ahlstrom, nor any of their respective affiliates, advisors or representatives or
any other person undertakes any obligation to review or confirm or to release
publicly any revisions to any forward-looking statements to reflect events that
occur or circumstances that arise after the date of this release.

This release includes estimates relating to the cost synergy benefits expected
to arise from the Merger and the combination of the business operations of
Munksjö and Ahlstrom as well as the related integration costs, which have been
prepared by Munksjö and Ahlstrom and are based on a number of assumptions and
judgments. Such estimates present the expected future impact of the Merger and
the combination of the business operations of Munksjö and Ahlstrom on the
combined company’s business, financial condition and results of operations. The
assumptions relating to the estimated cost synergy benefits and related
integration costs are inherently uncertain and are subject to a wide variety of
significant business, economic, and competitive risks and uncertainties that
could cause the actual cost synergy benefits from the Merger and the combination
of the business operations of Munksjö and Ahlstrom, if any, and related
integration costs to differ materially from the estimates in this release.
Further, there can be no certainty that the Merger will be completed in the
manner and timeframe described in this release, or at all.

Notice to Shareholders in the United States

The new shares in Munksjö have not been and will not be registered under the
U.S. Securities Act of 1933, as amended (the “Securities Act”) or under any of
the applicable securities laws of any state or other jurisdiction of the United
States. The new shares in Munksjö may not be offered or sold, directly or
indirectly, in or into the United States (as defined in Regulation S under the
Securities Act), unless registered under the Securities Act or pursuant to an
exemption from the registration requirements of the Securities Act and in
compliance with any applicable state securities laws of the United States. The
new shares in Munksjö will be offered in the United States in reliance upon the
exemption from the registration requirements of the Securities Act provided by
Rule 802 thereunder.

Munksjö and Ahlstrom are Finnish companies. Information distributed in
connection with the Merger and the related shareholder votes is subject to
disclosure requirements of Finland, which are different from those of the United
States. The financial information included in this release has been prepared in
accordance with accounting standards in Finland, which may not be comparable to
the financial statements or financial information of United States companies.

It may be difficult for Ahlstrom’s shareholders to enforce their rights and any
claim they may have arising under the U.S. federal securities laws in respect of
the Merger, since Munksjö and Ahlstrom are located in non-U.S. jurisdictions,
and all of their officers and directors are residents of non-U.S. jurisdictions.
Ahlstrom’s shareholders may not be able to sue Munksjö or Ahlstrom or their
officers or directors in a court in Finland for violations of the U.S.
securities laws. It may be difficult to compel Munksjö and Ahlstrom and their
affiliates to subject themselves to a U.S. court’s judgment.
Made by Munksjö – Intelligent paper technology
Munksjö is a world-leading manufacturer of advanced paper products developed
with intelligent paper technology. Munksjö offers customer-specific innovative
design and functionality in areas ranging from flooring, kitchens and
furnishings to release papers, consumer-friendly packaging and energy
transmission. The transition to a sustainable society is a natural driving force
for Munksjö's growth as the products can replace non-renewable materials. This
is what "Made by Munksjö" stands for. Given Munksjö's global presence and way of
integrating with the customers, the company forms a worldwide service
organisation with approximately 2,900 employees and 15 facilities located in
France, Sweden, Germany, Italy, Spain, Brazil and China. Munksjö's share is
listed on Nasdaq in Helsinki and Stockholm. Read more at www.munksjo.com.