Vaisala Oyj

Transaction in Own Shares • Nov 20, 2015

Disclosure 328424

Vaisala - Changes in company's own shares

Vaisala Corporation share repurchases completed

Vaisala Corporation Stock Exchange Release November 20, 2015 at 12:30 p.m. Vaisala Corporation share repurchases completed The share repurchases announced by Vaisala Corporation on April 28, 2015 have been completed. The Company has acquired through public trading in accordance with the rules of on the NASDAQ OMX Helsinki Ltd. during the time period April 30-November 19, 2015 a total of 160,000 Company's own shares at an average price per share of EUR 24.1771. The total value of the acquired shares was EUR 3,868,334.28. After the repurchases, the Company holds a total of 191,550 own A shares. Further information Kaarina Muurinen, CFO Tel +358 40 577 5066 Distribution NASDAQ OMX Helsinki Key media www.vaisala.com Vaisala is a global leader in environmental and industrial measurement. Building on 79 years of experience, Vaisala contributes to a better quality of life by providing a comprehensive range of innovative observation and measurement products and services for chosen weather-related and industrial markets. Headquartered in Finland, Vaisala employs approximately 1,600 professionals worldwide and is listed on the NASDAQ OMX Helsinki stock exchange. www.vaisala.com www.twitter.com/VaisalaGroup [HUG#1968385]