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 12.08.2008 that it purchased on 11.08.2008 4,500 HELEX common registered shares with a total value of 36,190.00 Euro

2. on 12.08.2008 that it sold on 11.08.2008 1,100 HELEX common registered shares with a total value of 8,788.20 Euro

3. on 13.08.2008 that it purchased on 12.08.2008 300 HELEX common registered shares with a total value of 2,366.00 Euro

4. on 13.08.2008 that it sold on 12.08.2008 4,000 HELEX common registered shares with a total value of 30,980.40 Euro

The above transactions were made for the derivatives market making account.