Tekna Holding ASA — Major Shareholding Notification 2011

May 12, 2011

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

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

Tekla Corporation       Stock exchange release      May
12, 2011                     2:15 p.m.

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

Tekla has today received the following notification: Nordea Rahastoyhtiö Suomi
Oy's holdings in Tekla Corporation have increased over the 5% threshold on May
11, 2011.

According to the notification, Nordea's holdings are now in total 1,183,675
shares and votes, which represent 5.24% 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,
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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