Tieto: Share repurchases on week 41

Tieto Corporation Stock exchange release 12 Oct 2026 at 03:00 p.m. EET Tieto: Share repurchases on week 41 In the Helsinki Stock Exchange Date Quantity Average price Total price 5.10.2026 70 000 18,2207 1 275 449,00 6.10.2026 60 000 18,4362 1 106 172,00 7.10.2026 50 000 18,4279 921 395,00 8.10.2026 40 000 18,7735 750 940,00 9.10.2026 70 000 18,3062 1 281 434,00 Total in week 41 290 000 18,3979 5 335 390,00 Tieto now holds a total of 1,142,000 shares including the shares repurchased on 9.10.2026 The share buybacks are executed in compliance with Regulation No. 596/2014 of the European Parliament and Council (MAR) Article 5 and the Commission Delegated Regulation (EU) 2016/1052. On behalf of Tieto Corporation Nordea Bank Oyj Sami Huttunen Ilari Isomäki For further information, please contact: Tommi Järvenpää, Head of Investor Relations, tel. +358 40 576 0288, tommi.jarvenpaa(at)tieto.com Distribution NASDAQ Helsinki NASDAQ Stockholm Principal Media Tieto is a leading software and digital engineering services company with global market reach and capabilities. We provide customers across different industries with mission-critical solutions through our specialized software businesses Tieto Caretech, Tieto Banktech and Tieto Indtech as well as Tieto Tech Consulting business. Our around 13 000 talented vertical software, design, cloud and AI experts are dedicated to empowring our customers to succeed and innovate with latest technology. Tieto`s annual revenue is approximately EUR 2 billion. The company`s shares are listed on the NASDAQ exchange in Helsinki and Stockholm. www.tieto.com