Ahlstrom Corporation STOCK EXCHANGE RELEASE April 15, 2014 at 14.00 Ahlstrom to publish January-March 2014 interim report on April 29, 2014 Ahlstrom will publish its January-March 2014 interim report on Tuesday, April 29, 2014, approximately at 9:00 Finnish time (CET +1). Ahlstrom's President & CEO Jan Lång and CFO Sakari Ahdekivi will present the report in Finnish at an analyst and press conference in Helsinki on Tuesday, April 29 at 10:00 a.m. Finnish time. The conference will take place at Ahlstrom's head office, Alvar Aallon katu 3 C, second floor, meeting room Antti. (Parking: Q-Park Finlandia, Karamzininranta 2.) In addition, CEO Lång and CFO Ahdekivi will hold a conference call in English on the same day at 2:30 p.m. Finnish time. To participate in the teleconference, please dial +358 (0)9 6937 9543 in Finland or +44 (0)20 3410 1910 outside Finland a few minutes before the conference begins. The confirmation code is 3163135. The event can also be viewed as a live audio cast at www.ahlstrom.com. Registration is required. It is possible to participate in the Q & A session online. An on-demand audio cast of the conference will be available on Ahlstrom's website for twelve months after the call. The presentation material will be available at www.ahlstrom.com > Investors > Reports and presentations > 2014 after the report has been published. For more information, please contact: Juho Erkheikki Manager, Financial Communications & Investor Relations Tel. +358 10 888 4731 Ahlstrom in brief Ahlstrom is a high performance fiber-based materials company, partnering with leading businesses around the world to help them stay ahead. We aim to grow with a product offering for clean and healthy environment. Our materials are used in everyday applications such as filters, medical fabrics, life science and diagnostics, wallcoverings and food packaging. In 2013, Ahlstrom's net sales from the continuing operations amounted to EUR 1 billion. Our 3,500 employees serve customers in 24 countries. Ahlstrom's share is quoted on the NASDAQ OMX Helsinki. More information available at www.ahlstrom.com. [HUG#1777473]