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 04.08.2008 that it purchased on 31.07.2008 500 HELEX common registered shares with a total value of 4,561.78 Euro

2. on 04.08.2008 that it purchased on 01.08.2008 1,000 HELEX common registered shares with a total value of 9,040.00 Euro

3. on 04.08.2008 that it sold on 01.08.2008 1,000 HELEX common registered shares with a total value of 8,980.00 Euro

4. on 04.08.2008 that it sold on 04.08.2008 6,100 HELEX common registered shares with a total value of 52,834.08 Euro

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