Notification about a significant change in the number of voting rights (Law 3556/2007)

HELLENIC EXCHANGES - ATHENS STOCK EXCHANGE S.A.

Notification about a significant change in the number of voting rights (Law 3556/2007)

MORGAN STANLEY informed the Company in writing on 07.05.2008 that on 29.04.2008 it sold common registered shares with a voting right of HELLENIC EXCHANGES S.A. HOLDING CLEARING SETTLEMENT & REGISTRY (HELEX). Following the abovementioned transaction, MORGAN STANLEY indirectly holds 4.970% of the share capital of HELEX (from 5.012% before the transaction).