VAISALA CORPORATION: SHARE REPURCHASE 19.5.2023 Published: May 19, 2023 Stock Exchange Releases VAISALA CORPORATION STOCK EXCHANGE RELEASE, 19.5.2023 VAISALA CORPORATION: SHARE REPURCHASE 19.5.2023 In the Helsinki Stock Exchange Trade date 19.5.2023 Bourse trade Buy Share VAIAS Amount 680 Shares Average price/ share 43.4577 EUR Total cost 29,551.24 EUR Vaisala Corporation now holds a total of 151 980 shares including the shares repurchased on 19.5.2023 On behalf of Vaisala Corporation Nordea Bank Oyj Janne Sarvikivi Sami Huttunen Additional information Paula Liimatta tel +358 9 8949 2020, [email protected] www.vaisala.com Vaisala is a global leader in weather, environmental, and industrial measurements. Building on over 85 years of experience, Vaisala provides observations for a better world, with space-proof technology even exploring Mars and beyond. We are a reliable partner for customers around the world, offering a comprehensive range of innovative observation and measurement products and services. Headquartered in Finland, Vaisala employs over 2,000 professionals worldwide and is listed on the Nasdaq Helsinki stock exchange. vaisala.com twitter.com/VaisalaGroup linkedin.com/vaisala Attachment VAIAS 19.5.2023 trades