Tekla Corporation STOCK EXCHANGE ANNOUNCEMENT 26 August 2008 ACQUISITIONS OF OWN SHARES Date: 26.08.08 Exchange transaction: Buy Share class: TLA1V Amount: 4000 Average price /share: 7.28136 EUR Highest price /share: 7.34 EUR Lowest price /share: 7.20 EUR Total price: 29125.44 EUR The shares held by Tekla Corporation on 26 August 2008 TLA1V 109600 TEKLA CORPORATION On behalf of Tekla Corporation Teemu Koivisto EVLI BANK PLC