National Bank of Greece S.A.

Transaction in Own Shares • Oct 6, 2025

Athens, 06/10/2025

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 and 26/09/2025 on purchase of own shares, announces that in the period from 25/09/2025 up to and including 02/10/2025 has purchased a total amount of 487,500 common shares of the Bank ("Own Shares") traded on the Athens Stock Exchange at a weighted average price of €12.2131 per share and at a total cost of €5,953,891.25. It is noted that in accordance with the resolutions of abovementioned 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.

Date	Number of Shares	Weighted Average Price (€)	Total cost (€)
25/9/2025	400,000	12.1757	4,870,280.00
26/9/2025	18,000	12.1259	218,266.20
29/9/2025	18,000	12.1752	219,153.60
30/9/2025	17,500	12.2931	215,129.25
1/10/2025	17,000	12.5327	213,055.90
2/10/2025	17,000	12.8239	218,006.30
Total	487,500	12.2131	5,953,891.25

The following transactions were executed during the abovementioned period:

Following the above transactions, the Bank holds directly a total of 9,364,285 Οwn Shares, which correspond to 1.02% 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.