Vaisala Corporation complies with the insider guidelines issued by the OMX Nordic Exchange. The company maintains its public and company-specific insider registers in the Finnish Central Securities Depository’s SIRE system

In accordance with the Securities Market Act, Vaisala Corporation’s public insiders include the members of the Board of Directors, the President and CEO, the members of the Corporate Management Group and the auditors. Persons employed by the company who, on account of their position or duties, have regular access to insider information are included in Vaisala’s company-specific register of permanent insiders. Persons who on the basis of an employment or other contract work for the company obtain insider information associated with a specific project are included in Vaisala’s project-specific register of insiders.

Permanent insiders are prohibited from trading in Vaisala's shares for 21 days prior to the publication of Vaisala’s interim reports or financial statements release. Project-specific insiders are prohibited from trading in the company’s shares until the project in question has been cancelled or disclosed.

Vaisala Group’s financial administration supervises compliance with the insider guidelines. The Group’s financial administration also monitors insider trading to ensure trading restrictions are not violated.