Tieto’s total number of shares increases – Cevian Capital’s holding consequently below 15%, with no change in shares held

Tieto Corporation STOCK EXCHANGE RELEASE 15 April 2015, 14.00 EET

Tieto has received an announcement pursuant to the Securities Market Act
regarding the shareholding of Cevian Capital Partners Ltd.

According to the announcement made by Tieto today, the number of the company’s
shares has increased due to share subscriptions pursuant to stock options. As a
result, the holding of Cevian Capital has fallen below the 15% threshold. The
number of shares held by Cevian Capital has remained unchanged at 11 073 614
shares.

Target company: Tieto Corporation (Business Identity Code: 0101138-5)

The registered number of Tieto shares: 73 926 163, which entitle to a total of
73 926 163 votes.

The current aggregate holding of Cevian Capital Partners Ltd (Registration
number: C45913) is 11 073 614 shares, corresponding to 14.98% of shares.

For further information, please contact:
Tanja Lounevirta, Head of Investor Relations, tel. +358 50 321 7510,
tanja.lounevirta (at) tieto.com

TIETO CORPORATION

DISTRIBUTION
NASDAQ Helsinki
NASDAQ Stockholm
Principal Media


Tieto is the largest IT services company in the Nordics providing full lifecycle
IT services. We also provide global product development services for companies
in the communications and embedded technologies arena. Through industry insight,
technology vision, and innovative thinking, Tieto proactively strives to inspire
and engage our customers in finding new ways of accelerating their business.

Building on a strong Nordic heritage, Tieto combines global capabilities with
local presence. Headquartered in Helsinki, Finland, Tieto has over 13 000
experts in more than 20 countries. Turnover is approximately EUR 1.5 billion.
Tieto’s shares are listed on NASDAQ in Helsinki and Stockholm. www.tieto.com