Tieto Oyj - Total number of voting rights and capital

Cevian Capital’s holding in Tieto above 15%

Tieto Corporation STOCK EXCHANGE RELEASE 7 December 2011, 9.00 am EET

Tieto Corporation has received an announcement pursuant to the Securities
Market Act regarding a change in its shareholding. Cevian Capital II Master
Fund L.P. (registration number: OG-17445) has announced that its aggregate
holding in Tieto Corporation has risen above the 15% threshold and is currently
15.16%. 

Target company: Tieto Corporation, Business Identity Code: 0101138-5

Date of change in holding: 5 December 2011

The current aggregate holding of Cevian Capital II Master Fund L.P is 10 918
331 shares. 

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 the leading IT service company in Northern Europe providing IT and
product engineering services. Our highly specialized IT solutions and services
complemented by a strong technology platform create tangible business benefits
for our local and global customers. As a trusted transformation partner, we are
close to our customers and understand their unique needs. With about 18 000
experts, we aim to become a leading service integrator creating the best
service experience in IT. www.tieto.com