Tieto Corporation STOCK EXCHANGE RELEASE 26 January 2010, 2.30 pm EET Tieto Corporation has received an announcement pursuant to the Securities Market Act regarding a change in its shareholding. OP-Pohjola Group Central Cooperative (OPK) (Registration number: 0242522-1) has announced that its group holding in Tieto Corporation has fallen below the 5% threshold. Target company: Tieto Corporation, Business Identity Code: 0101138-5 Date of change in holding: 22 January 2010 Portion of the shares and votes: The current group holding of OP-Pohjola Group Central Cooperative (OPK) is 2 982 587 shares, which represents 4.14% of the shares and voting rights. This position is held at the following entities (number of shares; % of shares and votes): Pohjola Bank plc. (50 000; 0.069%) Pohjola Insurance Ltd (90 000; 0.125%) A-Insurance Ltd (9 000; 0.012%) OP-Pohjola Group Central Cooperative (2 160 000; 2.999%) OP Bank Group Kyösti Haataja Foundation (1 600; 0.002%) OP Bank Group Research Foundation (11 400; 0.016%) OP-Delta (472 282; 0.656%) OP-Suomi Arvo (130 000; 0.180%) OP-Suomi Pienyhtiöt (33 146; 0.046%) OP-Eurooppa Pienyhtiöt (25 159; 0.035%) The registered number of shares of Tieto Corporation is 72 023 173, which entitle to a total of 72 023 173 votes. For further information, please contact Reeta Kaukiainen, VP, Communications and Investor Relations, tel. +358 2072 68711, reeta.kaukiainen@tieto.com TIETO CORPORATION DISTRIBUTION NASDAQ OMX Helsinki NASDAQ OMX Stockholm Principal Media Tieto is an IT service company providing IT, R&D and consulting services. With approximately 16 000 experts, we are among the leading IT service companies in Northern Europe and the global leader in selected segments. We specialize in areas where we have the deepest understanding of our customers' businesses and needs. Our superior customer centricity and Nordic expertise set us apart from our competitors. www.tieto.com <http://www.tieto.com/> [HUG#1377273]