Change in Ahlstrom-Munksjö Oyj's reporting practice

AHLSTROM-MUNKSJÖ OYJ STOCK EXCHANGE RELEASE APRIL 12, 2021 at 15:00 EET

Ahlstrom-Munksjö has decided to change its financial reporting practice in
respect of quarterly (Q1 and Q3) reports. Taking into account the pending
redemption proceedings concerning the Company's shares and the Company's
decision to apply for delisting of its shares, the Company will no longer
publish interim reports prepared in accordance with IAS34 for first three (Q1)
and first nine months (Q3) of the financial year. During the time the Company
remains listed on Nasdaq Helsinki Ltd and/or Nasdaq Stockholm Ltd it intends to
publish financial information for said periods in the form of a shorter business
review. As a consequence of the change in the reporting practice the Company
will not publish an interim report for January-March 2021 on April 27, 2021 as
previously announced.

The Company's parent company Spa Holdings 3 Oy is required to report
consolidated financial information for the January-March 2021 period to its debt
investors by the end of June 2021. The Company intends to publish a business
review for January-March 2021 simultaneously with such consolidated reporting by
its parent company, provided that the Company's shares are still listed at the
time. The exact timing of the possible publication of the business review will
be announced later.

As previously announced, the Company's Board of Directors has resolved to submit
applications to Nasdaq Helsinki and to Nasdaq Stockholm for the termination of
public trading and for the delisting of the Company's shares to become effective
(i) in respect of the shares admitted to trading on the main market of Nasdaq
Stockholm on or about  May 31, 2021, and (ii) in respect of the shares admitted
to trading on the official list of Nasdaq Helsinki as soon as possible upon Spa
Holdings 3 having gained title to all the shares in the Company in the pending
redemption proceedings.

Additional information:

Johan Lindh, Vice President, Communications and Investor Relations, + 358 10 888
4994
Juho Erkheikki, Investor Relations Manager, +358 10 888 4731

Ahlstrom-Munksjö in brief
Ahlstrom-Munksjö is a global leader in fiber-based materials, supplying
innovative and sustainable solutions to its customers. Our mission is to expand
the role of fiber-based solutions for sustainable everyday life. Our offering
includes filter materials, release liners, food and beverage processing
materials, decor papers, abrasive and tape backings, electrotechnical paper,
glass fiber materials, medical fiber materials, diagnostics and energy storage
solutions, as well as a range of specialty papers for industrial and consumer
end-uses. Our annual net sales is about EUR 2.7 billion and we employ some 7,800
people. Read more at www.ahlstrom-munksjo.com