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 06.08.2008 that it purchased on 05.08.2008 500 HELEX common registered shares with a total value of 4,370.00 Euro

2. on 06.08.2008 that it sold on 05.08.2008 1,200 HELEX common registered shares with a total value of 10,476.00 Euro

3. on 07.08.2008 that it purchased on 06.08.2008 4,500 HELEX common registered shares with a total value of 39,130.00 Euro

4. on 07.08.2008 that it sold on 06.08.2008 5,300 HELEX common registered shares with a total value of 46,004.00 Euro

5. on 07.08.2008 that it purchased on 06.08.2008 9,461 HELEX common registered shares with a total value of 82,310.70 Euro

6. on 07.08.2008 that it sold on 06.08.2008 9,461 HELEX common registered shares with a total value of 82,310.70 Euro

The transactions 1 to 4 were made for the derivatives market making account.