Tekla Corporation STOCK EXCHANGE ANNOUNCEMENT 05 September 2008 ACQUISITIONS OF OWN SHARES Date: 05.09.08 Exchange transaction: Buy Share class: TLA1V Amount: 8023 Average price /share: 7.28090 EUR Highest price /share: 7.39 EUR Lowest price /share: 7.19 EUR Total price: 58414.66 EUR The shares held by Tekla Corporation on 05 September 2008 TLA1V 126123 TEKLA CORPORATION On behalf of Tekla Corporation Teemu Koivisto EVLI BANK PLC