Initial Statement of Beneficial Ownership of Securities

This filing reports the initial beneficial ownership of securities by Michael Schrum, Chief Financial Officer of Bank of N.T. Butterfield & Son Ltd. Schrum directly owns 202,039 shares of the company's common stock. Additionally, he holds 242,666 Restricted Stock Units (RSUs) with a vesting date of August 9, 2027, and 155,235 RSUs with a vesting date of February 12, 2027. These RSUs represent a contingent right to receive one share of common stock upon vesting and do not expire, but are subject to continued service through the vesting dates. The RSUs will vest and settle or be forfeited/cancelled prior to the applicable vesting date.