Vaisala Oyj

Major Shareholding Notification • Sep 14, 2017

Disclosure 355069

Vaisala - Major shareholder announcements

Notification according to chapter 9, section 5 of the Securities Market Act: Nordea Funds Ltd's holding in Vaisala

Vaisala Corporation Stock Exchange Release September 14, 2017 at 7:00 pm EEST Notification according to chapter 9, section 5 of the Securities Market Act: Nordea Funds Ltd's holding in Vaisala Vaisala Corporation has received a notification, pursuant to Chapter 9, Section 5 of the Finnish Securities Markets Act, about a change in the holding of funds managed by Nordea Funds Ltd of the total amount of shares of Vaisala Corporation. On September 13, 2017, Nordea Funds Ltd's aggregate holding in Vaisala increased above the 5 percent threshold and amounted to 911,662 shares or 5.004% of Vaisala's shares and 1.103% of total votes. Vaisala's total number of shares is 18,218,364 and voting rights 82,616,033. Nordea Funds Ltd's holdings according to the notification: +-------------+-------+-------+------------+-----------+-------+-------+-------+ | |% of |% of |% of shares |% of voting|% of |% of |Total | | |shares |voting |through |rights |total |total |number | | |(A1) |rights |financial |through |shares |voting |of | | | |(A2) |instruments |financial |(A1+B1)|rights |shares | | | | |(B1) |instruments| |(A2+B2)|and | | | | | |(B2) | | |voting | | | | | | | | |rights | | | | | | | | |of | | | | | | | | |issuer | +-------------+-------+-------+------------+-----------+-------+-------+-------+ |Resulting |5.004% |1.103% |0 |0 |5.004% |1.103% |911,662| |situation on | | | | | | | | |the date on | | | | | | | | |which the | | | | | | | | |threshold was| | | | | | | | |crossed or | | | | | | | | |reached | | | | | | | | +-------------+-------+-------+------------+-----------+-------+-------+-------+ |Position of |- |- |- |- |- |- |- | |previous | | | | | | | | |notification | | | | | | | | |(if | | | | | | | | |applicable) | | | | | | | | +-------------+-------+-------+------------+-----------+-------+-------+-------+ For more information, please contact Kaarina Muurinen, CFO Tel. +358 40 577 5066 Vaisala Corporation Distribution Nasdaq Helsinki Key media www.vaisala.com Vaisala is a global leader in environmental and industrial measurement. Building on 80 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 Helsinki stock exchange. www.vaisala.com www.twitter.com/VaisalaGroup []