HELLENIC EXCHANGES S.A. HOLDING, CLEARING, SETTLEMENT AND REGISTRY (the Company) informs investors that, based on §4 article 4 of the European Commission Regulation 2273/2003, and in implementation of the resolution of the Annual General Meeting of shareholders of the Company of 14.5.2008, it purchased own shares, as follows: - On 7.7.2008 8,020 own shares were purchased, at an average price of euro 8.34 per share, and total transaction cost of euro 66,886.80 - On 8.7.2008 18,000 own shares were purchased, at an average price of euro 8.40 per share, and total transaction cost of euro 151,140.00 - On 9.7.2008 10,682 own shares were purchased, at an average price of euro 8.64 per share, and total transaction cost of euro 92,292.48 - On 10.7.2008 64,307 own shares were purchased, at an average price of euro 8.63 per share, and total transaction cost of euro 554,972.04 - On 11.7.2008 80,000 own shares were purchased, at an average price of euro 8.60 per share, and total transaction cost of euro 688,121.10 The transactions were done through the members of Athens Exchange Alpha Finance, Agricultural Bank of Greece Securities, Eurobank Securities and Midas Securities. Following the abovementioned purchases, the Company owns 1,061,009 own shares (1.51% of the total 70,485,563 shares outstanding).