Notification of a change in shareholding according to Securities Markets Act 2:9



Tekla Corporation                 Stock exchange release      May 9, 2011
                                         7:10 p.m.



Notification of a change in shareholding according to Securities Markets Act 2:9

According to the Securities Markets Act, Tekla Corporation has today received
the following notification on an agreement which, if executed in due course
leads to a change in holdings of the company:

Trimble and Tekla have on 8 May 2011 entered into a combination agreement,
according to which Trimble Finland Oy, a wholly owned subsidiary of Trimble,
will make a public tender offer to purchase all the issued and outstanding
shares in Tekla that are not owned by Tekla itself. Pursuant to the agreement,
the offer period for the Tender Offer is expected to commence on 19 May 2011 and
expire on 17 June 2011.

Ilmarinen Mutual Pension Insurance Company has confirmed its support for the
offer and undertaken to tender their shares in the offer (unless a higher offer
is available).

On the day of this notification, Ilmarinen's holdings are 2,049,116 or
approximately 9 percent of Tekla Shares and votes.

If the tender offer is excecuted, the holdings of Ilmarinen will decrease below
1/20 of all Tekla shares and votes. In that case Ilmarinen's holding would be,
based on the above mentioned undertaking, 0 shares, corresponding to 0.0 percent
of shares and votes in Tekla.

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


Tekla Corporation

Timo Keinänen, CFO
phone  358 400 813 027,
firstname.lastname@tekla.com





Distribution: NASDAQ OMX Helsinki Ltd, main media





Tekla Corporation

Tekla Corporation drives the evolution of digital information models with its
software, providing a growing competitive advantage to customers in the
construction, infrastructure and energy industries. Tekla's net sales for 2010
were nearly 58 million euros and operating result nearly 10 million euros.
International operations accounted for approximately 80% of net sales. Tekla has
customers in almost 100 countries, offices in 15 countries and a worldwide
partner network. Tekla Group currently employs approximately 500 persons, of
whom about 200 work outside of the headquarters in Finland. Tekla was
established in 1966, and is one of the longest-operating Finnish software
companies. www.tekla.com




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