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 29.08.2008 that it purchased on 27.08.2008 12,700 HELEX common registered shares with a total value of 95,900.10 Euro

2. on 29.08.2008 that it sold on 27.08.2008 3,300 HELEX common registered shares with a total value of 24,356.00 Euro

3. on 29.08.2008 that it purchased on 28.08.2008 3,300 HELEX common registered shares with a total value of 25,072.50 Euro

4. on 29.08.2008 that it sold on 28.08.2008 1,300 HELEX common registered shares with a total value of 9,932.10 Euro

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