"Iberdrola Retribución Flexible" Calendar

During December 2025 (expected on 16 December)

• Notice regarding, if applicable, the fulfillment of the Requirements in connection with the payment of the Interim Dividend.

31 December 2025 and 2, 5, 6 and 7 January 2026

• Trading days that count towards determining the number of free allocation rights required to receive one share and the gross amount of the Interim Dividend per share.

8 January 2026

• Communication of the number of free allocation rights required to receive one share and the gross amount of the Interim Dividend per share.

9 January 2026

• Publication of the announcement regarding the execution of the capital increase in the Official Gazette of the Commercial Registry.
• Last trading date for Iberdrola shares to be traded with the right to participate in the "Iberdrola Remuneración Flexible" system.

12 January 2026

• Ex-dividend date after which Iberdrola shares are traded without the right to participate in the "Iberdrola Remuneración Flexible" system.
• Start of the Common Election Period and the trading period for free allocation rights.

13 January 2026

• Reference date to determine the shareholders of the Company eligible to participate in the "Iberdrola Retribución Flexible" system

26 January 2026

• End of the Common Election Period and the trading period for the free allocation rights.

2 February 2026

• Payment of the Interim Dividend to shareholders who opted to receive cash through this option.
• Registration of the new shares to be issued under the capital increase in the records of "Sociedad de Gestión de los Sistemas de Registro, Compensación y Liquidación de Valores, S.A.U." (IBERCLEAR).

4 February 2026

• Expected start date for the trading of the new shares.