YIT Oyj — Major Shareholding Notification 2010

May 24, 2010

Disclosure 278927

YIT - Company Announcement

NOTIFICATION OF CHANGE IN HOLDINGS UNDER CHAPTER 2, SECTION 9 OF THE FINNISH SECURITIES MARKET ACT

YIT CORPORATION STOCK EXCHANGE RELEASE MAY 24, 2010 AT 10:45 NOTIFICATION OF CHANGE IN HOLDINGS UNDER CHAPTER 2, SECTION 9 OF THE FINNISH SECURITIES MARKET ACT YIT Corporation has on May 24, 2010 gained knowledge of notification under the Finnish Securities Market Act stating that following a share transaction on May 21, 2010 holdings of Varma Mutual Pension Insurance Company has increased to over 5% of YIT Corporation's shares and votes. The company holds a total of 6,570,908 YIT shares which equals to 5.17 per cent of YIT Corporation's shares. For additional information, contact: Virva Salmivaara, Senior Vice President, Corporate Communications, YIT Corporation, +358 (0)40 830 8091, virva.salmivaara@yit.fi YIT CORPORATION Virva Salmivaara Senior Vice President, Corporate Communications Distribution: NASDAQ OMX, major media, www.yitgroup.com