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


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