National Bank of Greece S.A.

Transaction in Own Shares • Oct 21, 2025

ANNOUNCEMENT ON PURCHASE OF OWN SHARES

National Bank of Greece S.A. ("the Bank"), following the resolutions of the Annual General Meeting of its Shareholders held on 30/05/2025 and its announcement of 04/06/2025 on the commencement of the implementation of the first tranche of the share buyback program approved by the above-mentioned Annual General Meeting (Tranche I), the respective approval of the Single Supervisory Mechanism (SSM) of the European Central Bank (ECB) on 28/05/2025 and its announcements of 16/06/2025, 26/06/2025, 04/07/2025, 14/07/2025, 21/07/2025, 29/07/2025, 07/08/2025, 18/08/2025, 26/08/2025, 02/09/2025, 09/09/2025, 17/09/2025, 26/09/2025, 06/10/2025 and 13/10/2025 on purchase of own shares, announces that in the period from 13/10/2025 up to and including 20/10/2025 has purchased a total amount of 105,637 common shares of the Bank ("Own Shares") traded on the Athens Stock Exchange at a weighted average price of €13.2049 per share and at a total cost of €1,394,931.12. It is noted that in accordance with the resolutions of above-mentioned Annual General Meeting, the Bank intends to proceed with a subsequent cancellation of the above acquired own shares, in accordance with the relevant provisions regarding the time frame for the cancellation of Law 4548/2018.

The following transactions were executed during the abovementioned period:

Date	Number of Shares	Weighted Average Price (€)	Total cost (€)
13/10/2025	6,000	13.8537	83,122.20
14/10/2025	5,642	13.6285	76,892.00
15/10/2025	6,000	13.7001	82,200.60
16/10/2025	29,995	13.2946	398,771.53
17/10/2025	33,000	12.7581	421,017.30
20/10/2025	25,000	13.3171	332,927.50
Total	105,637	13.2049	1,394,931.12

Following the above transactions, the Bank holds directly a total of 9,670,722 Οwn Shares, which correspond to 1.06% of its share capital.

This announcement is issued in accordance with the provisions of (EU) Regulation No 596/2014, the Commission Delegated Regulation (EU) 2016/1052 and Resolution No 25 of the Stock Markets Steering Committee of the Athens Exchange.

Tax ID: 094014201, Tax Office: KEFODE ATTIKIS, Gen. Com. Reg. No.: 237901000 nbg.gr