SUBMISSION OF REQUEST FOR THE REVISION OF THE VOLUNTARY SHARE EXCHANGE TENDER OFFER MADE BY EURONEXT N.V. (“OFFEROR” OR “EURONEXT”) FOR THE ORDINARY REGISTERED SHARES OF HELLENIC EXCHANGES-ATHENS STOCK EXCHANGE S.A.

Core Points - Euronext has submitted a request to revise its voluntary tender offer for the ordinary registered shares of Hellenic Exchanges-Athens Stock Exchange S.A. (ATHEX) [2][5] - The initial tender offer required at least 38,759,500 ATHEX shares, representing 67% of total voting rights, to be validly tendered [4] - The revised terms lower the minimum number of shares required to 30,174,001, which corresponds to 50% plus one share of total voting rights [5] - The acceptance period for the tender offer remains unchanged, running from October 6, 2025, to November 17, 2025 [6] Summary of Tender Offer - Euronext's tender offer was initially submitted on July 30, 2025, and was approved by the Hellenic Capital Market Commission (HCMC) on October 3, 2025 [2][3] - The revised tender offer is subject to HCMC approval and does not extend the acceptance period [6] - Shareholders who accepted the original tender offer will also be considered as having accepted the revised terms [7] Advisory Statement - Deutsche Bank AG is acting as the advisor to Euronext for the tender offer, confirming the Offeror's capability to issue and deliver the required shares [8][10] - The advisor considers the tender offer credible, contingent upon the fulfillment of the revised terms and conditions [10]