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)

STICHTING PENSIOENFONDS ABP informed the Company in writing on 05.11.2007 that on 01.11.2007 it sold common registered shares with a voting right of HELLENIC EXCHANGES S.A. HOLDING CLEARING SETTLEMENT & REGISTRY (HELEX) that it owned. Following the abovementioned sale, STICHTING PENSIOENFONDS ABP owns directly 4.23% (from 5.46% before the relevant transaction) of the share capital of HELEX.