Stock Exchange Announcement, February 13, 2008 Change in holding in OMX Qatar Holding LLC (Qatar Holding) announced today that they have decreased their holding in OMX AB below five (5) percent on February 13, 2008. The holding in OMX AB was decreased with 12,043,406 shares. Thereafter, Qatar Holding's holding in OMX AB is now 0 shares of OMX AB. The share capital of OMX AB consists of 120 640 467 shares. For further information, please contact: Jakob Håkanson, Vice President, Investor Relations, OMX +46 8 405 60 42