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. (“ATHEX”)

ANNOUNCEMENT

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. (“ATHEX”)

TENDER OFFER REVISION

1.   In accordance with Article 21, paragraph 2 of Law 3461/2006 as in force (the “Law”), Euronext announces the following:

a)   On 30 July 2025, (the “Date of the Tender Offer”) the Offeror submitted a voluntary tender offer (the “Tender Offer”) to acquire all ordinary registered shares, each having a nominal value of €0.42 (each, a “ATHEX Share”) issued by ATHEX, which Euronext and any “persons acting in concert” (as defined in article 2(e) of the Law) with Euronext, did not hold directly or indirectly as at the Date of the Tender Offer.

b)   On 3 October 2025, the Hellenic Capital Market Commission (the “HCMC”) approved the information circular in connection with the Tender Offer (the “Information Circular”).

c)   In the terms of the Tender Offer included in the Information Circular, Euronext had set as a prerequisite for the completion of the Tender Offer that no later than the end of the Acceptance Period, at least 38,759,500 ATHEX Shares, corresponding to at least 67% of ATHEX’s total voting rights whose exercise is not subject to suspension, shall have been lawfully and validly tendered to the Offeror (the “Minimum Number of Shares”). Euronext had stated that this prerequisite may be amended in accordance with the provisions of the Law.

d)   On 7 November 2025 (the “Date of the Revision”), Euronext submitted to the HCMC a request to revise the Tender Offer. According to the revised terms of the Tender Offer, the minimum number of shares that should have been lawfully and validly tendered to the Offeror for the Tender Offer to complete shall be equal to 30,174,001 ATHEX Shares, corresponding to 50% plus one (1) ATHEX Share of the total voting rights of ATHEX (the “Reduced Minimum Number of Shares”).

e)   The above revision of the Tender Offer in relation to the Reduced Minimum Number of Shares remains subject to approval by the HCMC in accordance with Article 21 of the Law.

f)   The revision of the Tender Offer does not extend the acceptance period of the Tender Offer which started on 6 October 2025 and ends on 17 November 2025, at the end of the business hours of banks operating in Greece (the “Acceptance Period”).