IBERDROLA, S.A. 06/07/2020 09:28 IBERDROLA, S.A. On financial instruments Supplement to the information memorandum relating to the terms and conditions of the first edition of the “Iberdrola Retribución Flexible” optional dividend system corresponding to the fiscal year 2020 Register number: 3213 Related to communication no. 1815 dated 28/04/2020 (20:16)