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 14.08.2008 that it purchased on 13.08.2008 700 HELEX common registered shares with a total value of 5,222.00 Euro

2. on 14.08.2008 that it sold on 13.08.2008 5,500 HELEX common registered shares with a total value of 40,720.00 Euro

3. on 18.08.2008 that it purchased on 14.08.2008 10,400 HELEX common registered shares with a total value of 76,570.00 Euro

4. on 18.08.2008 that it sold on 14.08.2008 140 HELEX common registered shares with a total value of 1,038.80 Euro

5. on 18.08.2008 that it sold on 14.08.2008 1,400 HELEX common registered shares with a total value of 10,346.00 Euro

The above transactions, excluding number four, were made for the derivatives market making account.