Tekla - Major shareholder announcements

Notification of a change in shareholding according to Securities Markets Act 2:10

Tekla Corporation       Stock exchange release      September 18,
2009    4:00 p.m.

Notification of a change in shareholding according to Securities
Markets Act 2:10
Tekla Corporation has received the following notification on
September 18, 2009 from Threadneedle Asset Management Holdings
Limited and Ameriprice Financial Inc. according to which their
holdings have decreased below the 10% threshold on September 17,
2009.

Ameriprice Financial Inc. is the parent company of Threadneedle Asset
Management Holdings Limited, which is the parent company of
Threadneedle Asset Management Limited and Threadneedle International
Limited.
According to the notification, the holdings of Ameriprice Inc. and
its group have decreased by 7,806 shares to a total of 2,251,721
shares, which represent 9.969% of Tekla's shares and voting rights.

The stock of Tekla Corporation comprises a total of 22,586,200
shares.


Tekla Corporation

Timo Keinänen, CFO
phone  358 400 813 027, timo.keinanen (at) tekla.com



Distribution:     OMX Nordic Exchange Helsinki, Main media

Tekla is an international software product company whose model-based
software solutions make customers' core processes more effective in
building and construction, energy distribution, infrastructure
management and water supply. Tekla has customers in over 90
countries. Tekla Group's net sales for 2008 were nearly 60 million
euros and operating result approximately 14 million euros.
International operations account for approximately 80% of net sales.
Tekla Group currently employs over 460 persons, of whom 190 work
outside Finland. Tekla was established in 1966, making it one of the
longest operating software companies in Finland. www.tekla.com