LONDON–(BUSINESS WIRE)– As Agent Bank, please be advised of the following rate determined on: 9/22/2026 Issue ¦ Standard Chartered Bank – Series 258 USD 25,000,000 FRN due March 2028 ISIN Number ¦ XS2606089089 ISIN Reference ¦ 260608908 Issue Nomin USD ¦ 25000000 Period ¦ 6/29/2026 to 9/29/2026 Payment Date 9/29/2026 Number of Days ¦ 92 Rate ¦ 5.00958 Denomination USD ¦ 1000 ¦ 25000000 ¦ Amount Payable per Denomination ¦ 12.8 ¦ 320000 ¦ Bank of New York Rate F