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 11.08.2008 that it purchased on 07.08.2008 100 HELEX common registered shares with a total value of 862.00 Euro

2. on 11.08.2008 that it sold on 07.08.2008 900 HELEX common registered shares with a total value of 7,756.00 Euro

3. on 11.08.2008 that it purchased on 08.08.2008 2,300 HELEX common registered shares with a total value of 18,676.00 Euro

4. on 11.08.2008 that it sold on 08.08.2008 5,300 HELEX common registered shares with a total value of 45,244.66 Euro

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