Tekla Corporation STOCK EXCHANGE ANNOUNCEMENT 29 September 2008 ACQUISITIONS OF OWN SHARES Date: 29.9.2008 Exchange transaction: Buy Share class: TLA1V Amount: 4000 Average price /share: 6,17000 EUR Highest price /share: 6,35 EUR Lowest price /share: 6,15 EUR Total price: 24680,00 EUR The shares held by Tekla Corporation on 29 September 2008 TLA1V 148866 TEKLA CORPORATION On behalf of Tekla Corporation Lauri Ahokanto EVLI BANK PLC