Ahlstrom Corporation STOCK EXCHANGE RELEASE 17.10.2008 Ahlstrom Corporation will publish its third quarter financial results for 2008 on Tuesday, October 28, 2008 approximately at 8.30 a.m. Finnish time. A news conference for media and analysts will be held on Tuesday, October 28, 2008 at 10.00 am Finnish time at Restaurant Savoy, address Eteläesplanadi 14, floor 7, cabinet 2. The conference will be held in Finnish. Welcome. A conference call for analysts and investors will be held in English on October 28, 2008 at 1.00 pm Finnish time. To participate in the teleconference, please dial +358 (0)9 2313 9201 a few minutes before the call. Use the title of the conference call: Ahlstrom conference call. A replay number is available until November 27, 2008. The number for the replay is +358 (0)9 2314 4681, access code: 814197. The presentation material will be available on October 28, 2008 after the interim report has been published at www.ahlstrom.com > Investors> IR presentations. Ahlstrom Corporation Niina Suhonen Vice President, Corporate Communications Distribution: NASDAQ OMX Helsinki Main media www.ahlstrom.com Ahlstrom in brief Ahlstrom is a global leader in the development, manufacture and marketing of high performance fiber-based materials. Nonwovens and specialty papers, made by Ahlstrom, are used in a large variety of everyday products, such as filters, wipes, flooring, labels, and tapes. Based upon its unique fiber expertise and innovative approach, the company has a strong market position in several business areas in which it operates. Ahlstrom's 6,500 employees serve customers via sales offices and production facilities in more than 20 countries on six continents. In 2007, Ahlstrom's net sales amounted to EUR 1.8 billion. Ahlstrom's share is listed on the NASDAQ OMX Helsinki. The company website is www.ahlstrom.com.