Issuance of Additional Tier 1 (AT1) Notes with a total nominal value of EUR 250 million

In reference to the current report no. 53/2026 dated 17 September 2026, the Management Board of mBank S.A. (“Bank”) hereby announces that the subscription for the Bank’s Additional Tier 1 capital instruments (the “AT1 Notes”), with a total nominal value of EUR 250,000,000, was completed on 22 September 2026. In connection with the intention to admit the AT1 Notes to trading on the Regulated Market of the Luxembourg Stock Exchange, the Bank discloses the following information: 1)subscription opening date: 22 September 2026; 2)subscription closing date: 22 September 2026; 3)AT1 Notes allocation date: 22 September 2026; 4)number of AT1 Notes covered by the subscription: 2,500; 5)the allocation reduction rate of the AT1 Notes allocated in one tranche was 85.69%; 6)number of AT1 Notes subscribed: 17,471; 7)number of AT1 Notes which were allocated within the subscription: 2,500; 8)issue price of the AT1 Notes: 100% of their nominal value; 9)number of investors who subscribed for the AT1 Notes in specific tranches: 135 investors; 10)number of investors to whom the AT1 Notes were allocated within the subscription in specific tranches: 89 investors; 11)names of the underwriters that acquired the AT1 Notes under underwriting agreements: not applicable; 12)the aggregate nominal value of subscription, i.e. the product of the number of AT1 Notes under the offering and the issue price: EUR 250,000,000 (in words: two hundred and fifty million euros) equivalent to PLN 1,086,575,000 based on the average NBP exchange rate as of 22 September 2026; 13)the total costs which were included in the issuance costs: the Bank will disclose such information in an updated current report after it has received and accepted all the payments connected with the issuance; 14)the average cost of subscription per one subscribed AT1 Note: the Bank will disclose such information in an updated current report after all payments related to the issuance have been received and approved; 15)the way of payment for AT1 Notes to be acquired: the payment will be made by wire transfer to the Bank’s account. The AT1 Notes will bear interest at a fixed rate from the issue date until 29 March 2032. Thereafter, the interest rate will be reset every five years and will be equal to the sum of the then-prevailing five-year EUR swap rate and the margin specified in the terms and conditions of the issuance. Interest will be payable semi-annually. The expected Fitch rating of the AT1 Notes is BB- (EXP).