Conversion of unlisted shares series K into series A

Vaisala Oyj  Stock Exchange Announcement  29.06.2010  at 12.00   1(1) Vaisala Oyj's 3000 unlisted shares (series K) have been converted into listed shares (series A). The conversion has been registered in the Finnish Trade Register June 29, 2010. Listing of the new series A shares has been applied for as of June 30, 2010. Further information: Jouni Lintunen, CFO Tel. +358 9 8949 2215 or +358 40 5790181 Vaisala Oyj Distribution: Helsinki Exchanges [HUG#1427994] This announcement is distributed by Thomson Reuters on behalf of Thomson Reuters clients. The owner of this announcement warrants that: (i) the releases contained herein are protected by copyright and other applicable laws; and (ii) they are solely responsible for the content, accuracy and originality of the information contained therein. All reproduction for further distribution is prohibited. Source: Vaisala Oyj via Thomson Reuters ONE