Caverion Corporation supplements its prospectus

STOCK EXCHANGE RELEASE                    1 July 2013 at 9.55 a.m.

CAVERION CORPORATION SUPPLEMENTS ITS PROSPECTUS

Caverion Corporation (”Caverion”) has supplemented Caverion Corporation’s registration document and the securities note and summary relating to YIT’s partial demerger published by YIT Corporation (“YIT”) on behalf of Caverion on 4 June 2013 (together the “Prospectus”) with the information in a stock exchange release published by YIT on 28 June 2013, according to which the due diligence process as well as sale and purchase agreement negotiations with German HOCHTIEF Service Solutions commenced based on an initial, non-binding offer made by YIT on May have ended without result.

The Finnish Financial Supervisory Authority has approved the supplement on 1 July 2013. The responsibilities and liabilities related to the Prospectus published by YIT on behalf of Caverion have, according to the demerger plan related to the partial demerger of YIT, been transferred to Caverion in the implementation of the demerger on 30 June 2013.

The supplement is available as of 1 July 2013 on YIT’s website at www.yit.fi/sijoittajat and Caverion’s website at www.caverion.fi/sijoittajat. The unofficial English translation of the supplement will be available as of 1 July 2013 on YIT’s website at www.yitgroup.com/investors and Caverion’s website at www.caverion.com/investors.

The registration document according to the Finnish Securities Markets Act, which includes information on Caverion and its business and financial position, as well as the securities note and summary (together with the registration document the “Prospectus”) related to the partial demerger disclosed by YIT on 5 February 2013 and the shares to be given as demerger consideration in connection with the partial demerger, have been available as of 5 June 2013 on YIT’s website at www.yit.fi/sijoittajat. The unofficial English translation of the Prospectus has been available as of 5 June 2013 on YIT’s website at www.yitgroup.com/investors. The Prospectus has already been supplemented by a supplement document dated 26 June 2013, which has been available as a part of the Prospectus as of 27 June 2013 in the above mentioned addresses.

Helsinki, 1 July 2013

YIT Corporation

For further information, please contact:

Hanna-Maria Heikkinen, Vice President, Investor Relations, YIT Corporation, tel. +358 40 826 2172, hanna-maria.heikkinen@yit.fi

Distribution:

NASDAQ OMX Helsinki

Major media

www.yitgroup.com

YIT leads the way in construction field by creating more attractive and sustainable urban environments in Finland, Russia, the Baltic countries, the Czech Republic and Slovakia. YIT builds housing, business premises and infrastructure, develops entire areas, and offers residential service concepts for consumers. YIT has over 100 years of experience and a strong market position: it is the largest residential construction company in Finland and the most significant foreign residential construction company in Russia. YIT is also one of the largest business premises and infrastructure construction companies in Finland. YIT has more than 6,000 employees in seven countries. In 2012, the company’s revenue was approximately EUR 2.0 billion. YIT’s shares are listed on NASDAQ OMX Helsinki. www.yitgroup.com

DISCLAIMER

This announcement is not an offer of securities for sale in any jurisdiction. No securities are being registered under the US Securities Act of 1933 and may not be offered or sold in the United States absent registration or an exemption from registration.  No public offering of securities is being made in the United States.

This release includes forward-looking statements. These forward-looking statements include, but are not limited to, all statements other than statements of historical facts contained in this communication, including, without limitation, those regarding the demerger plan and its execution. By their nature, forward looking statements involve known and unknown risks, uncertainties and other factors because they relate to events and depend on circumstances that may or may not occur in the future. Such statements are based on numerous assumptions and may differ materially from (and be significantly more negative than) those made in, or suggested by, the forward-looking statements contained in this release.