Hellenic Exchanges S.A. announces, pursuant to Law 3556/2007 (articles 3 and 21) and in conjunction with article 11 of resolution 1/434/03.07.2007 of the Capital Market Commission, that EFG Eurobank Securities notified it: 1. on 19.08.2008 that it sold on 18.08.2008 1,000 HELEX common registered shares with a total value of euro 7,534.00 2. on 20.08.2008 that it sold on 19.08.2008 6,200 HELEX common registered shares with a total value of euro 46,468.00 3. on 20.08.2008 that it purchased on 19.08.2008 140 HELEX common registered shares with a total value of euro 1,058.40 4. on 20.08.2008 that it purchased on 19.08.2008 3,000 HELEX common registered shares with a total value of euro 22,240.00 The above transactions, excluding number four, were made for the derivatives market making account.