LONDON–(BUSINESS WIRE)–Â 27-October-2026 Issue: Bank of Montreal Series 309 XS2580656549 Pursuant to our appointment as Agent for the above stated issue, please be advised of the following interest rate determination: Date From: 27-October-2026 Date To: 27-January-2027 Record Date: 22-January-2027 Value Date: 27-January-2027 Benchmark Rate: 3.24054% Margin: 0.92% Total Rate: 4.16054% Number of Days: 92 Day Count: Actual / 365 (Fixed) Interest Frequency: Quarterly Denomination: HKD 1,000,000.0