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 10.07.2008 that it purchased on 08.07.2008 1,200 HELEX common registered shares with a total value of euro 10,102.00 b) on 10.07.2008 that it sold on 08.07.2008 13,100 HELEX common registered shares with a total value of euro 109,359.38 c) on 10.07.2008 that it purchased on 09.07.2008 5,300 HELEX common registered shares with a total value of euro 46,179.00 d) on 10.07.2008 that it sold on 09.07.2008 2,100 HELEX common registered shares with a total value of euro 18,340.00 The above mentioned transactions were made for the derivatives market making account.