TO: Investment CommunityFROM : Garanti BBVA / Investor RelationsSUBJECT: CMB Approval for Bond Issuance to Foreign MarketsDATE: October 09, 2025Reference: Public disclosures of T. Garanti Bankasi A.S. dated April 19, 2013It was announced on April 19, 2013 that GMTN (Global Medium Term Notes) program has been established by our Bank in order to arrange borrowing instruments issuance transactions in any currency with different series and maturities. Below stated CMB issuance certificates has been received in regards to the issuance under the GMTN programme. ISIN Issue Date Maturity Currency Nominal Amount XS3202009547 09.10.2025 14.10.2026 EUR 20.000.000*In contradiction between the Turkish and English versions of this public disclosure, the Turkish version shall prevail. We declare that our above statements are in conformity with the principles included in the Board’s Communiqué, Serial II Nr.15.1, that it exactly reflects the information we received; that the information complies with our records, books and documents; that we did our best to obtain the correct and complete information relative to this subject and that we are responsible for the declarations made in this regard. Yours sincerely,Garanti BBVAContact Garanti BBVA Investor Relations:Tel: +90 212 318 2352Fax: +90 212 216 5902E-mail: [email protected]