Insider Transaction Report for Lee Michael Sean

This filing details a Form 4 submission by Lee Michael Sean, Head of Human Resources at Bank of N.T. Butterfield & Son Ltd. The report covers transactions on May 27, 2026, involving restricted stock units. Specifically, 49 units of "Restricted Stock Units - EDIP" and 47 units of "Restricted Stock Units - ELTIP" were acquired. These units represent contingent rights to receive common stock upon vesting. The EDIP units vest on February 12, 2027, February 10, 2028, and February 9, 2029, subject to continued service. The ELTIP units vest on the third anniversary of the grant date, which is February 10, 2028, and February 9, 2029. All transactions were direct holdings, with no purchase price indicated as the units were acquired under an employee stock plan. Following these transactions, Mr. Lee holds 5617 EDIP units and 5393 ELTIP units.