National Bank of Greece S.A.

Transaction in Own Shares • Sep 26, 2025

Athens, 26/09/2025

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 and 17/09/2025 on purchase of own shares, announces that in the period from 17/09/2025 up to and including 24/09/2025 has purchased a total amount of 549,975 common shares of the Bank ("Own Shares") traded on the Athens Stock Exchange at a weighted average price of €11.8985 per share and at a total cost of €6,543,866.80. 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.

Date	Number of Shares	Weighted Average Price (€)	Total cost (€)
17/9/2025	278,975	11.8921	3,317,598.60
18/9/2025	18,000	11.9044	214,279.20
19/9/2025	10,000	11.8689	118,689.00
22/9/2025	218,000	11.8642	2,586,395.60
23/9/2025	7,000	12.2486	85,740.20
24/9/2025	18,000	12.2869	221,164.20
Total	549,975	11.8985	6,543,866.80

The following transactions were executed during the abovementioned period:

Following the above transactions, the Bank holds directly a total of 8,876,785 Οwn Shares, which correspond to 0.97% 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.