EXECUTION VERSION SUPPLEMENTAL AGENCY AGREEMENT DATED 19 SEPTEMBER 2023 TÜRKİYE İHRACAT KREDİ BANKASI A.Ş. U.S.$ 5,000,000,000GLOBAL MEDIUM TERM NOTE PROGRAMMEAgency Agreement • September 19th, 2023Contract TypeAgency AgreementFiledSeptember 19th, 2023