•Net income of $52.7 million, or $1.16 per share, and core net income1 of $52.8 million, or $1.16 per share

•Return on average common equity of 20.3% and core return on average tangible common equity1 of 22.5%

•Net interest margin of 2.61%, cost of deposits of 1.91%

•Board declares dividend for the quarter ended September 30, 2024 of $0.44 per share

•Repurchases of 1.0 million common shares at an average price of $37.00 per share

Hamilton, Bermuda - October 22, 2024: The Bank of N.T. Butterfield & Son Limited ("Butterfield" or the "Bank") (BSX: NTB.BH; NYSE: NTB) today announced financial results for the quarter ended September 30, 2024.

Net income for the third quarter of 2024 was $52.7 million, or $1.16 per diluted common share, compared to net income of $50.6 million, or $1.09 per diluted common share, for the previous quarter and $48.7 million, or $0.99 per diluted common share, for the third quarter of 2023. Core net income1 for the third quarter of 2024 was $52.8 million, or $1.16 per diluted common share, compared to $51.4 million, or $1.11 per diluted common share, for the previous quarter and $57.0 million, or $1.16 per diluted common share, for the third quarter of 2023.

The return on average common equity for the third quarter of 2024 was 20.3% compared to 20.7% for the previous quarter and 20.6% for the third quarter of 2023. The core return on average tangible common equity1 for the third quarter of 2024 was 22.5%, compared to 23.3% for the previous quarter and 26.1% for the third quarter of 2023. The efficiency ratio for the third quarter of 2024 was 60.3%, compared to 62.4% for the previous quarter and 64.1% for the third quarter of 2023. The core efficiency ratio1 for the third quarter of 2024 was 60.2% compared with 61.8% in the previous quarter and 58.3% for the third quarter of 2023.

Michael Collins, Chairman and Chief Executive Officer, commented, “Butterfield delivered strong results in the third quarter of 2024 through improved efficiency, stable non-interest income, and focused capital management. We have a high fee/income ratio and will continue to increase the proportion of fee revenue over time through acquisitions, while returning excess capital to our shareholders. Economic conditions in Bermuda, the Cayman Islands, and the Channel Islands remain favorable, with strong demand and contributions from both international business and tourism. As we enter a period of easing financial conditions, we expect to see better affordability for borrowing customers and a general pick-up in business activity."

Net income was up in the third quarter of 2024 versus the prior quarter primarily due to higher net interest income and lower non-interest expense, as well as a modest increase in non-interest income.

Net interest income (“NII”) for the third quarter of 2024 was $88.1 million, or $0.6 million higher compared with NII of $87.4 million in the previous quarter and down $2.1 million from $90.2 million in the third quarter of 2023. NII was

higher during the third quarter of 2024 compared to the second quarter of 2024, primarily due to higher average investable asset volume, which was partially offset by higher deposit costs and lower treasury yields. Compared to the third quarter of 2023, the decreased NII in the third quarter of 2024 was due to higher deposit costs, that were slightly offset by higher yielding interest earning assets and a larger balance sheet.

Net interest margin (“NIM”) for the third quarter of 2024 was 2.61%, a decrease of 3 basis points from 2.64% in the previous quarter and down 15 basis points from 2.76% in the third quarter of 2023. NIM in the third quarter of 2024 decreased compared to the prior quarter and third quarter of 2023 due to mix shift to term deposits and lower treasury yields, partially offset by increased yields on investments.

Non-interest income for the third quarter of 2024 was $56.0 million, an increase of $0.4 million from $55.6 million in the previous quarter and $4.0 million higher than $52.0 million in the third quarter of 2023. The increase in the third quarter of 2024 compared to the prior quarter was due to higher card volume, one-off loan prepayment fees, and growth in asset management fees due to higher asset valuations. The increases were partially offset by lower unclaimed balances recognized into income. Non-interest income in the third quarter of 2024 was higher than the third quarter of 2023 primarily due to increases in asset management fees, as well as increased trust income from assets acquired from Credit Suisse.

Non-interest expenses were $88.8 million in the third quarter of 2024, compared to $91.1 million in the previous quarter and $92.5 million in the third quarter of 2023. Core non-interest expenses1 of $88.6 million in the third quarter of 2024 were lower than the $90.3 million incurred in the previous quarter and higher than the $84.3 million incurred in the third quarter of 2023. Core non-interest expenses1 in the third quarter of 2024 were lower compared to the prior quarter due to decreased professional and outside services costs. Compared to the third quarter of 2023, core non-interest expenses1 were higher due to performance-based remuneration accruals and inflationary increases in staff healthcare costs and property cost; and increased expense arising from the recently implemented core banking software.

Period end deposit balances were $12.7 billion, an increase of 6.3% compared to $12.0 billion at December 31, 2023, primarily due to deposit increases in the Channel Islands, as well as a strengthened British pound. Average deposits were $12.4 billion in the quarter ended September 30, 2024, in-line with the prior quarter.

Tangible book value per share improved by $1.87 or 9.3% this quarter to $21.90 per share.

The Bank maintained its balanced capital return policy. The Board again declared a quarterly dividend of $0.44 per common share to be paid on November 19, 2024 to shareholders of record on November 5, 2024. During the third quarter of 2024, Butterfield repurchased 1.0 million common shares under the Bank's existing share repurchase program.

The current total regulatory capital ratio as at September 30, 2024 was 24.3% as calculated under Basel III, compared to 25.4% as at December 31, 2023. Both of these ratios remain conservatively above the minimum Basel III regulatory requirements applicable to the Bank.

(1)See table "Reconciliation of US GAAP Results to Core Earnings" below for reconciliation of US GAAP results to non-GAAP measures.

(2)In accordance with regulatory capital guidance, the Bank has elected to make use of transitional arrangements which allow the deferral of the January 1, 2020 Current Expected Credit Loss ("CECL") impact of $7.8 million on its regulatory capital over a period of 5 years.

Net income for the quarter ended September 30, 2024 was $52.7 million, up from $50.6 million in the prior quarter.

Movements in net income during the quarter ended September 30, 2024 compared to the previous quarter are attributable to the following:

•$0.4 million increase in non-interest income driven by (i) $0.6 million increase in banking fees due to one-off loan prepayment fees and increased card volumes; (ii) $0.6 million increase in asset management fees due to increases in asset valuations; (iii) offset by $0.9 million decrease in other non-interest income due to a decrease in unclaimed customer balances being recognized in revenue, and a $0.4 million decrease in foreign exchange revenue due to seasonality and lower volumes;

•$0.6 million increase in net interest income before provision for credit losses driven by an increased volume of interest earning assets, increased yields on new investment assets and additional day count. This was partially offset by decreased yields on treasury assets as market interest rates declined;

•$0.8 million increase in provision for credit losses driven by a commercial facility in Bermuda;

•$2.4 million decrease in non-interest expenses driven by (i) $1.9 million decrease in professional and outside services fees in the current quarter; and (ii) $0.4 million decrease in technology and communications from reduced depreciation on IT equipment and lower software maintenance costs; and

•$0.3 million increase in income tax expenses due to higher net income in the Channel Islands.

Non-Core Items1

Non-core items resulted in expenses, net of gains, of $0.1 million in the third quarter of 2024. Non-core items for the quarter included legal fees for corporate restructuring work in the Channel Islands.

Management does not believe that comparative period expenses, gains or losses identified as non-core are indicative of the results of operations of the Bank in the ordinary course of business.

(1)See table "Reconciliation of US GAAP Results to Core Earnings" below for reconciliation of US GAAP results to non-GAAP measures.

Total assets of the Bank were $14.4 billion at September 30, 2024, an increase of $1.0 billion from December 31, 2023. The Bank maintained a highly liquid position at September 30, 2024, with $9.3 billion of cash, bank deposits, reverse repurchase agreements and liquid investments representing 64.6% of total assets, compared with 61.0% at December 31, 2023.

The loan portfolio totaled $4.6 billion at September 30, 2024, which was $0.1 billion lower than December 31, 2023 balances. The decrease was driven primarily by maturities and prepayments in excess of originations across the residential mortgage portfolios, partially offset by a strengthened British pound.

The allowance for credit losses at September 30, 2024 totaled $25.8 million, which remains flat from $25.8 million at December 31, 2023.

The loan portfolio represented 32.3% of total assets at September 30, 2024 (December 31, 2023: 35.5%), while loans as a percentage of total deposits was 36.5% at September 30, 2024 (December 31, 2023: 39.6%). The decrease in both ratios was attributable principally to a decrease in loan balances at September 30, 2024 compared to December 31, 2023.

As at September 30, 2024, the Bank had gross non-accrual loans of $89.6 million, representing 1.9% of total gross loans, an increase of $28.6 million from $61.0 million, or 1.3% of total loans, at December 31, 2023. The increase in non-accrual loans was driven by a commercial facility secured by real estate in Bermuda and residential mortgages in the Channel Islands and UK segment.

Other real estate owned (“OREO”) decreased by $0.1 million compared to December 31, 2023 driven by the sale of a residential property in Bermuda.

The investment portfolio was $5.5 billion at September 30, 2024, which was $0.2 billion lower than the December 31, 2023 balances. The changes were attributable to paydowns and maturities in the portfolio.

The investment portfolio is made up of high-quality assets with 100% invested in A-or-better-rated securities. The investment book yield was 2.39% during the quarter ended September 30, 2024 compared with 2.30% during the previous quarter. Total net unrealized losses on the available-for-sale portfolio decreased to $117.1 million, compared with total net unrealized losses of $163.9 million at December 31, 2023, as a result of declining long-term US dollar interest rates.

Average total deposit balances were consistent with the prior quarter at $12.4 billion for the quarter ended September 30, 2024, while period end balances as at September 30, 2024 were $12.7 billion, an increase of $0.7 billion compared to December 31, 2023.

Average Balance Sheet2

(2) Averages are based upon a daily averages for the periods indicated.

Total assets under administration for the trust and custody businesses were $133.5 billion and $30.2 billion, respectively, at September 30, 2024, while assets under management were $6.0 billion at September 30, 2024. This compares with $132.4 billion, $30.3 billion and $5.5 billion, respectively, at December 31, 2023.

The table below shows the reconciliation of net income in accordance with US GAAP to core earnings, a non-GAAP measure, which excludes certain significant items that are included in our US GAAP results of operations. We focus on core net income, which we calculate by adjusting net income to exclude certain income or expense items that are not representative of our business operations, or “non-core”. Core net income includes revenue, gains, losses and expense items incurred in the normal course of business. We believe that expressing earnings and certain other financial measures excluding these non-core items provides a meaningful base for period-to-period comparisons, which management believes will assist investors in analyzing the operating results of the Bank and predicting future performance. We believe that presentation of these non-GAAP financial measures will permit investors to assess the performance of the Bank on the same basis as management.

Butterfield will host a conference call to discuss the Bank’s results on Wednesday, October 23, 2024 at 10:00 a.m. Eastern Time. Callers may access the conference call by dialing +1 (844) 855-9501 (toll-free) or +1 (412) 858-4603 (international) ten minutes prior to the start of the call and referencing the Conference ID: Butterfield Group. A live webcast of the conference call, including a slide presentation, will be available in the investor relations section of Butterfield’s website at www.butterfieldgroup.com. A replay of the call will be archived on the Butterfield website for 12 months.

Certain statements in this release involve the use of non-GAAP financial measures. We believe such measures provide useful information to investors that is supplementary to our financial condition, results of operations and cash flows computed in accordance with US GAAP; however, our non-GAAP financial measures have a number of limitations. As such, investors should not view these disclosures as a substitute for results determined in accordance with US GAAP, and they are not necessarily comparable to non-GAAP financial measures that other companies use. See "Reconciliation of US GAAP Results to Core Earnings" for additional information.

Certain of the statements made in this release are forward-looking statements within the meaning of the U.S. Private Securities Litigation Reform Act of 1995. Forward-looking statements include statements with respect to our beliefs, plans, objectives, goals, expectations, anticipations, assumptions estimates, intentions, and future performance, including, without limitation, our intention to make share repurchases, our dividend payout target, our fee/income ratio, our OCI burndown, and affordability for borrowing customers and business activity levels, and involve known and unknown risks, uncertainties and other factors, which may be beyond our control, and which may cause the actual results, performance, capital, ownership or achievements of Butterfield to be materially different from future results, performance or achievements expressed or implied by such forward-looking statements due to a variety of factors, including worldwide economic conditions (including economic growth and general business conditions) and fluctuations of interest rates, inflation, a decline in Bermuda’s sovereign credit rating, any sudden liquidity crisis, the successful completion and integration of acquisitions (including our integration of the trust assets acquired from Credit Suisse) or the realization of the anticipated benefits of such acquisitions in the expected time-frames or at all, success in business retention (including the retention of relationships associated with our Credit Suisse acquisition) and obtaining new business, potential impacts of climate change, the success of our updated systems and platforms and other factors. Forward-looking statements can be identified by words such as "anticipate," "assume," "believe," "estimate," "expect," "indicate," "intend," "may," "plan," "point to," "predict," "project," "seek," "target," "potential," "will," "would," "could," "should," "continue," "contemplate" and other similar expressions, although not all forward-looking statements contain these identifying words. All statements other than statements of historical fact are statements that could be forward-looking statements.

All forward-looking statements in this disclosure are expressly qualified in their entirety by this cautionary notice, including, without limitation, those risks and uncertainties described in our SEC reports and filings, including under the caption "Risk Factors" in our most recent Form 20-F. Such reports are available upon request from Butterfield, or from the Securities and Exchange Commission ("SEC"), including through the SEC’s website at https://www.sec.gov. Any forward-looking statements made by Butterfield are current views as at the date they are made. Except as otherwise required by law, Butterfield assumes no obligation and does not undertake to review, update, revise or correct any of the forward-looking statements included in this disclosure, whether as a result of new information, future events or other developments. You are cautioned not to place undue reliance on the forward-looking statements made by Butterfield in this disclosure. Comparisons of results for current and any prior periods are not intended to express any future trends or indications of future performance, and should only be viewed as historical data. BF-All

Certain monetary amounts, percentages and other figures included in this report have been subject to rounding adjustments. Accordingly, figures shown as totals in certain tables may not be the arithmetic aggregation of the figures that precede them, and figures expressed as percentages in the text may not total 100% or, as applicable, when aggregated may not be the arithmetic aggregation of the percentages that precede them.

Butterfield is a full-service bank and wealth manager headquartered in Hamilton, Bermuda, providing services to clients from Bermuda, the Cayman Islands, Guernsey and Jersey, where our principal banking operations are located, and The Bahamas, Switzerland, Singapore and the United Kingdom, where we offer specialized financial services. Banking services comprise deposit, cash management and lending solutions for individual, business and institutional clients. Wealth management services are composed of trust, private banking, asset management and custody. In Bermuda, the Cayman Islands and Guernsey, we offer both banking and wealth management. In The Bahamas, Singapore and Switzerland, we offer select wealth management services. In the UK, we offer residential property lending. In Jersey, we offer select banking and wealth management services. Butterfield is publicly traded on the New York Stock Exchange (symbol: NTB) and the Bermuda Stock Exchange (symbol: NTB.BH). Further details on the Butterfield Group can be obtained from our website at: www.butterfieldgroup.com.

Investor Relations Contact:                Media Relations Contact:        

Noah Fields                    Nicky Stevens

Investor Relations                 Group Strategic Marketing & Communications

The Bank of N.T. Butterfield & Son Limited        The Bank of N.T. Butterfield & Son Limited        

Phone: (441) 299 3816                Phone: (441) 299 1624    

E-mail: noah.fields@butterfieldgroup.com         E-mail: nicky.stevens@butterfieldgroup.com

        

The Bank of N.T. Butterfield & Son Limited (“Butterfield”, the “Bank” or the “Company”) is incorporated under the laws of Bermuda and has a banking license under the Banks and Deposit Companies Act, 1999 (“the Act”). Butterfield is regulated by the Bermuda Monetary Authority (“BMA”), which operates in accordance with Basel principles.

Butterfield is a full service bank and wealth manager headquartered in Hamilton, Bermuda. The Bank operates its business through three geographic segments: Bermuda, Cayman, and the Channel Islands and the United Kingdom ("UK"), where its principal banking operations are located and where it offers specialized financial services. Butterfield offers banking services, comprised of retail and corporate banking, and wealth management, which consists of trust, private banking, and asset management. In the Bermuda, Cayman, and Channel Islands and the UK segments, Butterfield offers both banking and wealth management services. Butterfield also has operations in the jurisdictions of The Bahamas, Canada, Mauritius, Singapore and Switzerland, which are included in our Other segment.

The Bank's common shares trade on the New York Stock Exchange under the symbol "NTB" and on the Bermuda Stock Exchange ("BSX") under the symbol "NTB.BH".

The accompanying unaudited interim consolidated financial statements of the Bank have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) for interim financial information and should be read in conjunction with the Bank’s audited financial statements for the year ended December 31, 2023.

In the opinion of Management, these unaudited interim consolidated financial statements reflect all adjustments (consisting primarily of normal recurring accruals) considered necessary for a fair statement of the Bank’s financial position and results of operations as at the end of and for the periods presented. The Bank’s results for interim periods are not necessarily indicative of results for the full year.

The preparation of financial statements in conformity with GAAP requires Management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities at the date of the unaudited consolidated financial statements and the reported amounts of revenues and expenses during the reporting period, and actual results could differ from those estimates. Management believes that the most critical accounting estimates upon which the financial condition depends, and which involve the most complex or subjective decisions or assessments, are as follows:

•Allowance for credit losses

•Fair value of financial instruments

•Impairment of goodwill

•Employee benefit plans

•Share-based compensation

There were no accounting developments issued during the nine months ended September 30, 2024 or accounting standards pending adoption which impacted the Bank.

On the consolidated balance sheets, available-for-sale ("AFS") investments are carried at fair value and held-to-maturity ('HTM') investments are carried at amortized cost.

¹For the nine months ended September 30, 2024 and September 30, 2023, impairments recognized in other comprehensive income for HTM investments were nil.

The Bank does not believe that the AFS debt securities that were in an unrealized loss position as of September 30, 2024, comprising 164 securities representing 73.7% of the AFS portfolios' carrying value (December 31, 2023: 163 and 96.2%), represent credit losses. Total gross unrealized AFS losses were 7.9% of the fair value of the affected securities (December 31, 2023: 9.4%).

The Bank’s HTM debt securities are comprised of US government and federal agencies securities and have a zero credit loss assumption under the CECL model. HTM debt securities that were in an unrealized loss position as of September 30, 2024, were comprised of 219 securities representing 98.9% of the HTM portfolios’ carrying value (December 31, 2023: 219 and 100%). Total gross unrealized HTM losses were 14.8% of the fair value of affected securities (December 31, 2023: 16.3%).

Management does not intend to sell and it is likely that management will not be required to sell the securities prior to the anticipated recovery of the cost of these securities. Unrealized losses were attributable primarily to changes in market interest rates, relative to when the investment securities were purchased, and not due to a decrease in the credit quality of the investment securities. The issuers continue to make timely principal and interest payments on the securities. The following describes the processes for identifying credit impairment in security types with the most significant unrealized losses as shown in the preceding tables.

Management believes that all the US government and federal agencies securities do not have any credit losses, given the explicit and implicit guarantees provided by the US federal government.

Management believes that all the Non-US governments debt securities do not have any credit losses, given the explicit guarantee provided by the issuing government.

Investments in Asset-backed securities - Student loans are composed primarily of securities collateralized by Federal Family Education Loan Program loans (“FFELP loans”). FFELP loans benefit from a US federal government guarantee of at least 97% of defaulted principal and accrued interest, with additional credit support provided in the form of over-collateralization, subordination and excess spread, which collectively total in excess of 100%. Accordingly, the vast majority of FFELP loan-backed securities are not exposed to traditional consumer credit risk.

Investments in Residential mortgage-backed securities relate to 13 securities (December 31, 2023: 13) which are rated AAA and possess similar significant credit enhancement as described above. No credit losses were recognized on these securities as the weighted average credit support and the weighted average loan-to-value ratios range from 15.6% - 49.8% and 44.2% - 53.2%, respectively. Current credit support is significantly greater than any delinquencies experienced on the underlying mortgages.

In the following tables, debt securities with unrealized losses that are not deemed to be credit impaired and for which an allowance for credit losses has not been recorded are categorized as being in a loss position for "less than 12 months" or "12 months or more" based on the point in time that the fair value most recently declined below the amortized

cost basis.

The following table presents the remaining term to contractual maturity of the Bank’s securities. The actual maturities may differ as certain securities offer prepayment options to the borrowers.

The Bank pledges certain US government and federal agencies investment securities to further secure the Bank's issued customer deposit products. The secured party does not have the right to sell or repledge the collateral.

The Bank also pledges certain non-US governments debt investment securities to secure the Bank's repurchase agreements. Where the secured party has the right to sell or repledge the collateral, the Bank discloses such pledged financial assets separately in the accompanying consolidated balance sheets.

None of the investments' interest income have received a specific preferential income tax treatment in any of the jurisdictions in which the Bank owns investments.

The principal means of securing residential mortgages, personal, credit card and business loans are entitlements over assets and guarantees. Mortgage loans are generally repayable over periods of up to thirty years and personal and business loans are generally repayable over a period of five to ten years, depending on the purpose. Government loans are repayable over a variety of terms which are individually negotiated. Amounts owing on credit cards are revolving and typically a minimum amount is due within 30 days from billing. The credit card portfolio is managed as a single portfolio and includes consumer and business cards. The effective yield on total loans as at September 30, 2024 is 6.39% (December 31, 2023: 6.46%). The interest receivable on total loans as at September 30, 2024 is $15.0 million (December 31, 2023: $23.1 million). The interest receivable is included in Accrued interest and other assets on the consolidated balance sheets and is excluded from all loan amounts disclosed in this note.

The four credit quality classifications set out in the following tables are defined below and describe the credit quality of the Bank's lending portfolio. These classifications each encompass a range of more granular internal credit rating grades. Loans' internal credit ratings are assigned by the Bank's customer relationship managers as well as members of the Bank's jurisdictional and Group Credit Committees. The borrowers' financial condition is documented at loan origination and maintained periodically thereafter at a frequency which can be up to monthly for certain loans. The loans' performing status, as well as current economic trends, are continuously monitored. The Bank's jurisdictional and Group Credit Committees meet on a monthly basis. The Bank also has a Group Provisions and Impairments Committee which is responsible for approving significant provisions and other impairment charges.

A pass loan shall mean a loan that is expected to be repaid as agreed. A loan is classified as pass where the Bank is not expected to face repayment difficulties because the present and projected cash flows are sufficient to repay the debt and the repayment schedule as established by the agreement is being followed. Loans in this category are reviewed by the Bank’s management on at least an annual basis.

A special mention loan shall mean a loan under close monitoring by the Bank’s management on at least a quarterly basis. Loans in this category are currently still performing, but are potentially weak and present an undue credit risk exposure, but not to the point of justifying a classification of substandard.

A substandard loan shall mean a loan whose evident unreliability makes repayment doubtful and there is a threat of loss to the Bank unless the unreliability is averted. Loans in this category are under close monitoring by the Bank’s management on at least a quarterly basis.

A non-accrual loan shall mean either management is of the opinion full payment of principal or interest is in doubt or that the principal or interest is 90 days past due unless it is a residential mortgage loan which is well secured and collection efforts are reasonably expected to result in amounts due. Loans in this category are under close monitoring by the Bank’s management on at least a quarterly basis.

The amortized cost of loans by credit quality classification and allowance for expected credit losses by class of loans is as follows:

1 Other consumer loans’ amortized cost includes $11 million of cash and portfolio secured lending and $32 million of lending secured by buildings in construction or other collateral.

1 Other consumer loans’ amortized cost includes $8 million of cash and portfolio secured lending and $27 million of lending secured by buildings in construction or other collateral.

Based on the most recent analysis performed, the amortized cost of loans by year of origination and credit quality classification is as follows:

The following tables summarize the past due status of the loans. The aging of past due amounts are determined based on the contractual delinquency status of payments under the loan and this aging may be affected by the timing of the last business day at period end. Loans less than 30 days past due are included in current loans.