Vaisala to sell its treasury shares

Vaisala Corporation                                        
Stock Exchange Release               
March 10, 2015 at 12:30 p.m.

Vaisala to sell its treasury shares

The Board of Directors of Vaisala Corporation has decided to use the authorization granted by the Annual General Meeting of Shareholders held on 26 March, 2014 for transferring the Company's series A treasury shares. Vaisala Corporation sells a total of 63,800 series A treasury shares held by the Company in order to cover the cash reward of the Performance Share Plan 2012. The cash reward is used to cover withholding tax and other similar costs. The sale of the Company's treasury shares will commence earliest on March 11th, 2015. The Company's treasury shares will be sold through public trading at the market price prevailing at the time of the transactions in accordance with the rules of the Nasdaq OMX Helsinki Ltd.

Currently the Company holds 159,150 series A treasury shares in its possession. A total of 63,800 series A treasury shares representing approximately 0.35% of the Company's total shares, 0.43% of all series A shares and 0.08% of the total voting rights will be sold. After the directed share issue without consideration which Vaisala released as the stock exchange release on March 10th, 2015 and selling its treasury shares the Company holds a total of 31,550 series A treasury shares.

Further information
Kaarina Muurinen, CFO
gsm +358 40 577 5066
Vaisala Corporation

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