Appointment of the Chairwoman of the Supervisory Board with effect from 1 November 2026

The Management Board of mBank S.A. (the “Bank”) hereby announces that on 3 September 2026 the Supervisory Board of the Bank appointed Ms Aleksandra Gren, a member of the Bank’s Supervisory Board, as Chairwoman of the Supervisory Board of the Bank for the duration of the present term of office, with effect from 1 November 2026.The above change is related to the resignation of Ms Agnieszka Słomka-Gołębiowska from her position as a member of the Bank’s Supervisory Board, effective as of the end of 31 October 2026, which the Bank reported on 31 August 2026 in Current Report No. 49/2026. Aleksandra Gren has over 30 years of experience in the financial and technology sectors, including executive and supervisory roles. She began her career in 1995 at the Royal Bank of Canada in Canada. She subsequently participated in preparations for the launch of ING Direct in the Italian market. For more than two decades thereafter, she worked with US technology and fintech companies operating in Poland and across the EMEA region.Since 2020, she has served as an independent member of the Supervisory Board of mBank S.A. Since the establishment of the Supervisory Board’s IT Committee in 2021, she has served as its Chairwoman, leading the Committee’s work in overseeing the Bank’s IT and security strategy, ICT risk, business continuity and key technology initiatives.

She has extensive experience in technology transformation, cybersecurity, risk management, strategic oversight and corporate governance. She is the recipient of Polish and international awards in the financial and technology sectors, including the Banking Technology Awards and the PayTech Leadership Awards in London. She was named “Business Personality of the Year 2021” by the Federation of Polish Entrepreneurs and “Visionary of the Year” at IT@Bank 2025. In 2025, she was also awarded the Nicolaus Copernicus Medal by the Polish Bank Association for her contribution to the development and secure operation of the Polish banking sector.

She is a graduate of the University of British Columbia and the London School of Economics. She has also completed executive education programmes at Harvard Business School and Stanford Graduate School of Business.