HELSINKI--(BUSINESS WIRE)--Regulatory News: Tieto Corporation (HEX:TIE1V) (STO:TIEN) 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. T