THE FINNISH FINANCIAL SUPERVISORY AUTHORITY HAS APPROVED CAVERION CORPORATION’S REGISTRATION DOCUMENT PUBLISHED BY YIT CORPORATION AND THE SECURITIES NOTE AND SUMMARY RELATING TO YIT CORPORATION’S PARTIAL DEMERGER

YIT CORPORATION              STOCK EXCHANGE RELEASE                   4 June 2013 at 16.40 p.m.

THE FINNISH FINANCIAL SUPERVISORY AUTHORITY HAS APPROVED CAVERION CORPORATION’S REGISTRATION DOCUMENT PUBLISHED BY YIT CORPORATION AND THE SECURITIES NOTE AND SUMMARY RELATING TO YIT CORPORATION’S PARTIAL DEMERGER

The Finnish Financial Supervisory Authority has today 4 June 2013 approved the registration document of Caverion Corporation (“Caverion”) to be established in the partial demerger of YIT Corporation (“YIT”). The registration document includes information on Caverion and its business and financial position. The registration document is valid for 12 months from its approval by the Finnish Financial Supervisory Authority.

The Finnish Financial Supervisory Authority has today 4 June 2013 also approved 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.

The demerger plan signed by YIT’s Board of Directors has been published on 21 February 2013. YIT’s Board of Directors has proposed the approval of the partial demerger to the Extraordinary General Meeting to be held on 17 June 2013. The planned registration date of the implementation of the demerger is 30 June 2013.

The Finnish Prospectus approved by the Finnish Financial Supervisory Authority will be available as of 5 June 2013 on YIT’s website at www.yit.fi/sijoittajat. The unofficial English translation of the Prospectus will be available as of 5 June 2013 on YIT’s website at www.yitgroup.com/investors.

YIT has published on 4 June 2013 on a separate stock exchange release some previously undisclosed information contained in the Prospectus. The published stock exchange release included the following information contained in the Prospectus:

• Caverion’s outlook and guidance for the second half of 2013
• Strategy and financial objectives for Caverion Group
• Caverion Group’s historical carve-out financial information
• Caverion Group’s pro forma financial information
• Events after the three-month period ended March 31, 2013
• Caverion’s dividends and dividend policy
• Caverion’s treasury policy

Shareholders and investors are instructed to acquaint themselves with the entire Prospectus in addition to the stock exchange release published on 4 June 2013.

Helsinki, 4 June 2013

YIT Corporation

Board of Directors

For further information, please contact:

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

Milena Hæggström, Investor Relations Manager, YIT Corporation, tel. +358 40 5581 328, milena.haeggstrom@yit.fi

Distribution: NASDAQ OMX, principal media, www.yitgroup.com

YIT is a leading European service company in building systems, construction services and services for industry. Our 25,000 professionals serve customers in 14 countries in the Nordic and Baltic countries, Russia and Central Europe. For over one hundred years we have grown together with our customers and developed our services in line with the changes taking place in different societies. We intend to continue on that track. Our vision is to lead the way in creating and maintaining good living environments. In 2012, YIT’s revenue was approximately EUR 4.7 billion. YIT’s shares are listed on the NASDAQ OMX Helsinki. www.yitgroup.com

DISCLAIMER

The information contained herein shall not constitute an offer to sell or the solicitation of an offer to buy the securities referred to herein in any jurisdiction in which such offer, solicitation or sale would be unlawful prior to registration, exemption from registration or qualification under the securities laws of any such jurisdiction.

This document is not an offer for sale of securities in the United States. Securities may not be offered or sold in the United States absent registration or an exemption from registration under the U.S. Securities Act of 1933, as amended. YIT Corporation and Caverion Oyj have not registered, and do not intend to register, any offering of the Caverion shares in the United States. There will be no public offering of the Caverion shares 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.