Hellenic Exchanges S.A. announces, pursuant to Law 3556/2007 (articles 3 and 21) and in conjunction with article 11 of decision 1/434/03.07.2007 of the Capital Market Commission, that EFG Eurobank Securities notified it: a) on 24.06.2008 that it purchased on 19.06.2008 3,900 HELEX common registered shares with a total value of euro 40,702.50 b) on 24.06.2008 that it sold on 19.06.2008 4,000 HELEX common registered shares with a total value of euro 41,812.74 c) on 24.06.2008 that it purchased on 20.06.2008 3,000 HELEX common registered shares with a total value of euro 30,904.00 d) on 24.06.2008 that it sold on 20.06.2008 24,100 HELEX common registered shares with a total value of euro 249,010.32 c) on 24.06.2008 that it purchased on 23.06.2008 1,700 HELEX common registered shares with a total value of euro 17,268.00 d) on 24.06.2008 that it sold on 23.06.2008 15,600 HELEX common registered shares with a total value of euro 156,424.00 The above mentioned transactions were made for the derivatives market making account.