OMX Nordic Exchange Copenhagen is open May 2, 2008 Copenhagen, April 1, 2008 — OMX Nordic Exchange, part of the NASDAQ OMX Group, Inc. (NASDAQ: NDAQ) (NASDAQ OMX Group) informs that the Nordic Exchange Copenhagen is open May 2 2008. In connection to the new agreement within the Financials sector in Denmark an official closing day for the banks has been introduced for the Friday after Ascension Day. Since this has practical, technical and legal impact on the sector and in order to meet existing arrangements, the Nordic Exchange Copenhagen and other market participants in Denmark have chosen to stay open this day in 2008. May 2, 2008, is seen as a normal trading day. -#- The NASDAQ OMX Group, Inc. is the world's largest exchange company. It delivers trading, exchange technology and public company services across six continents, and with over 3,900 companies, it is number one in worldwide listings among major markets. NASDAQ OMX offers multiple capital raising solutions to companies around the globe, including its U.S. listings market; the OMX Nordic Exchange, including First North; and the 144A PORTAL Market. The company offers trading across multiple asset classes including equities, derivatives, debt, commodities, structured products and ETFs. NASDAQ OMX technology supports the operations of over 60 exchanges, clearing organizations and central securities depositories in more than 50 countries. OMX Nordic Exchange is not a legal entity but describes the common offering from Nasdaq OMX exchanges in Helsinki, Copenhagen, Stockholm, Iceland, Tallinn, Riga, and Vilnius. For more information about NASDAQ OMX, visit www.nasdaqomx.com. About OMX Nordic Exchange | OMX Nordic Exchange serves as a central gateway to the Nordic and Baltic financial markets, offering listing and trading services for among others; issuers, bank and brokers and market data vendors. The Nordic Exchange comprises over 850 companies including its alternative market First North and offers trading in equities, derivatives, fixed income and more. The Nordic Exchange is not a legal entity but describes the common offering from Nasdaq OMX exchanges in Helsinki, Copenhagen, Stockholm, Iceland, Tallinn, Riga, and Vilnius. For more information, please visit www.omxgroup.com. -#- CONTACTS: NASDAQ OMX Group, Inc. Ellen-Margrethe Soelberg +45 33 77 04 30