1st Repetitive General Meeting of HELEX - 30 May 2011

Announcement

1^st Repetitive General Meeting of HELEX

30 May 2011 - HELLENIC EXCHANGES S.A. HOLDING, CLEARING, SETTLEMENT AND REGISTRY announces that today, May 30^th 2011, the 1^st Repetitive General Meeting of shareholders of the Company was held in the "HERMES" hall at the offices of the Company. Shareholders representing 38,874,420 common registered shares and voting rights, i.e. 59.47% of the 65,368,563 total common registered shares participated.

The General Meeting approved the reduction of the share capital by the amount of €6,536,856.30 through a reduction in the par value of each share by €0.10, and payment of this amount to shareholders, and amendment of article 5 of the Articles of Association of the Company concerning the share capital.

Furthermore, the General Meeting authorized the Board of Directors to set the ex-date for the right to the share capital return of the Company, the record date for determining the beneficiaries and the payment date for the share capital return.

The Company will inform investors about the ex-date and the record date of the special dividend with a new announcement.