Tekla Corporation STOCK EXCHANGE ANNOUNCEMENT 02 September 2008 ACQUISITIONS OF OWN SHARES Date: 2.9.2008 Exchange transaction: Buy Share class: TLA1V Amount: 4000 Average price /share: 7,36147 EUR Highest price /share: 7,48 EUR Lowest price /share: 7,35 EUR Total price: 29445,88 EUR The shares held by Tekla Corporation on 02 September 2008 TLA1V 118100 TEKLA CORPORATION On behalf of Tekla Corporation Jaakko Salomaa EVLI BANK PLC