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ITEM 1A. Risk Factors

In addition to factors discussed in the description of our business and elsewhere in this Annual Report, the following are factors that could adversely affect our future results of operations and financial condition.

Risks Related to our Lending Activities

Our portfolios of commercial real estate loans and commercial and industrial loans have increased in recent periods, and we intend to continue originating these types of loans. These loans involve credit risks that could adversely affect our financial condition and results of operations.

At December 31, 2023, commercial real estate, multifamily loans and construction and land development loans, totaled $2.01 billion, or 51.5% of our loan portfolio, and commercial and industrial loans, including those secured by owner-occupied real estate, totaled $487.8 million, or 12.5% of our loan portfolio. These loans generally have more risk than the one-to four-family residential real estate loans we originate. Such loans typically involve larger loan balances to single borrowers or groups of related borrowers compared to one- to four-family residential mortgage loans. In addition, the repayment of these types of loans depends on the successful management and operation of the borrower’s businesses or properties. The repayment of such loans can be affected by adverse conditions in the local real estate market or economy. Also, many of our commercial borrowers have more than one loan outstanding with us. At December 31, 2023, our loans-to-one borrower limit was $125.8 million and our four largest borrower relationships, including available lines of credit, were $76.2 million, $70.6 million, $68.5 million and $67.6 million, respectively. Consequently, an adverse development with respect to one loan or one credit relationship can expose us to a significantly greater risk of loss compared to an adverse development with respect to a one- to four-family residential real estate loan. Commercial and industrial loans expose us to additional risk since they typically are dependent on the borrower’s ability to make repayments from the cash flows of the business and are sometimes secured by non-real estate collateral that may depreciate over time, such as inventory and accounts receivable, the value of which may be more difficult to appraise, control or collect and may be more susceptible to fluctuation in value at the time of default. In addition, if we foreclose on commercial real estate loans, our holding period for the collateral may be longer than for a single-family residential property if there are fewer potential purchasers of the collateral. Furthermore, if loans that are collateralized by commercial real estate become troubled and the value of the real estate has been significantly impaired, then we may not be able to recover the full contractual amount of principal and interest that we anticipated at the time we originated the loan. Any of these risks could cause us to increase our provision for credit losses and adversely affect our operating results and financial condition.

The level of our commercial real estate loan portfolio subjects us to additional regulatory scrutiny.

The Federal Reserve Board and the other federal bank regulatory agencies have promulgated joint guidance on sound risk management practices for financial institutions with concentrations in commercial real estate lending. Under

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the guidance, a financial institution that is actively involved in commercial real estate lending should perform a risk assessment to identify concentrations. A financial institution may have a concentration in commercial real estate lending if, among other factors, (i) total reported loans for construction, land acquisition and development, and other land represent 100% or more of total capital, or (ii) total reported loans secured by multifamily and non-farm residential properties, loans for construction, land acquisition and development and other land, and loans otherwise sensitive to the general commercial real estate market, including loans to non-owner occupied commercial real estate related entities, represent 300% or more of total capital.

Based on these factors we could be deemed to have a concentration in commercial real estate lending, as such loans represent approximately 234.9% of our total capital as of December 31, 2023. The guidance focuses on exposure to commercial real estate loans that is dependent on the cash flow from the real estate held as collateral and that is likely to be at greater risk to conditions in the commercial real estate market (as opposed to real estate collateral held as a secondary source of repayment or as an abundance of caution). The guidance assists banks in developing risk management practices and capital levels commensurate with the level and nature of real estate concentrations. The guidance states that management should employ heightened risk management practices including board and management oversight and strategic planning, development of underwriting standards, risk assessment and monitoring through market analysis and stress testing. While we believe we have implemented policies and procedures with respect to our commercial real estate loan portfolio consistent with this guidance, bank regulators could require us to implement additional policies and procedures consistent with their interpretation of the guidance that may result in additional costs to us or that may result in a curtailment of our commercial real estate lending, including multifamily and construction and land development lending, and/or the requirement that we maintain higher levels of regulatory capital, either of which would adversely affect our loan originations and profitability.

Our construction and land development loans involve credit risks that could adversely affect our financial condition and results of operations.

At December 31, 2023, construction loans and loans to finance the acquisition of developable land which we refer to as “land development loans” totaled $622.7 million, or 16.0% of our loan portfolio and 100.4% of our the Bank’s total capital. Construction lending involves additional risks when compared with permanent finance lending because funds are advanced upon the security of the project, which is of uncertain value before its completion. Because of the uncertainties inherent in estimating construction costs, as well as the market value of the completed project and the effects of governmental regulation of real property, it is relatively difficult to accurately evaluate the total funds required to complete a project and the related loan-to-value ratio. In addition, generally during the term of a construction loan, interest may be funded by the borrower or disbursed from an interest reserve set aside from the construction loan budget. These loans often involve the disbursement of substantial funds with repayment substantially dependent on the success of the ultimate project and the ability of the borrower to sell or lease the property or obtain permanent take-out financing, rather than the ability of the borrower or guarantor to repay principal and interest. If the appraised value of a completed project proves to be overstated, we may have inadequate security for the repayment of the loan upon completion of construction of the project and may incur a loss. In addition, speculative construction loans, which are loans made to home builders who, at the time of loan origination, have not yet secured an end buyer for the home under construction, typically carry higher risks than those associated with traditional construction loans. These increased risks arise because of the risk that there will be inadequate demand to ensure the sale of the property within an acceptable time. As a result, in addition to the risks associated with traditional construction loans, speculative construction loans carry the added risk that the builder will have to pay the property taxes and other carrying costs of the property until an end buyer is found. Land loans have substantially similar risks to speculative construction loans. As our construction and land loan portfolio increases, the corresponding risks and potential for losses from these loans may also increase.

Lack of seasoning of certain portions of our commercial and industrial loan portfolio, especially with respect to cannabis, wind and solar customers, may increase the risk of credit defaults in the future.

We have experienced significant loan growth in recent years in our larger commercial and industrial loans, which we refer to as Structured Finance loans. Most of these loans are to new customers in the cannabis, wind and solar industries. We believe we have grown these loan portfolios consistent with prudent underwriting standards but in general, loans do not begin to show signs of credit deterioration or default until they have been outstanding for some

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period of time, a process referred to as “seasoning.” As a result, a portfolio of older loans will usually behave more predictably than a newer portfolio. It will take several years to determine our borrowers’ payment histories, with respect to many of these new lending relationships and, as a result, we may not be able to reliably evaluate the quality of the loan portfolio until that time.

Our historical emphasis on residential mortgage loans exposes us to lending risks.

At December 31, 2023, $1.10 billion, or 28.2% of our loan portfolio, was secured by one- to four-family residential real estate and we intend to continue to provide this type of lending for the foreseeable future. One- to four-family residential mortgage lending is generally sensitive to regional and local economic conditions that significantly impact the ability of borrowers to meet their loan payment obligations, making loss levels difficult to predict. Declines in real estate values could cause some of our residential mortgages to be inadequately collateralized, which would expose us to a greater risk of loss if we seek to recover on defaulted loans by selling the real estate collateral.

The geographic concentration of our loan portfolio and lending activities makes us vulnerable to a downturn in the local economy.

We primarily serve individuals and businesses located in the Greater Boston metropolitan area and surrounding communities, including eastern Connecticut, southern New Hampshire and Rhode Island. At December 31, 2023, the vast majority of our total loans were primarily secured by real estate in this market area, defined as within a 100-mile radius of the company headquarters in Needham, Massachusetts. At December 31, 2023, $46.4 million in loans were reported as out of territory, excluding Structured Finance loans, which have a broader geographical targeted footprint. Therefore, our success is largely dependent on the economic conditions, including employment levels, population growth, income levels, savings trends and government policies, in this market area. Although our loan portfolio has very limited exposure to commercial office space in downtown Boston, increased vacancies in this market resulting in depressed prices could have a ripple effect on the Greater Boston Metropolitan area. Moreover, the continued trend of hybrid and remote work would likely result in increased vacancy rates in commercial office space throughout the Greater Boston metropolitan area which could also negatively affect the demand for retail occupancy and sales in surrounding areas, any of which could adversely affect the value of the properties used as collateral for such loans. Similarly, weaker economic conditions caused by recessions, unemployment, inflation, a decline in real estate values or other factors beyond our control may adversely affect the ability of our borrowers to service their debt obligations and could result in higher loan and lease losses and lower net income for us.

Although there is not a single employer or industry in our market area on which a significant number of our customers are dependent, a substantial portion of our loan portfolio is composed of loans secured by property located in the Greater Boston metropolitan area. This makes us vulnerable to a downturn in the local economy and real estate markets. Decreases in local real estate values caused by economic conditions or other events could adversely affect the value of the property used as collateral for our loans, which could cause us to realize a loss in the event of a foreclosure.

A worsening of business and economic conditions generally or specifically in the principal markets in which we conduct business could have adverse effects on our business, including the following:

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Moreover, a significant decline in general economic conditions, caused by inflation, recession, acts of terrorism, an outbreak of hostilities or other international or domestic calamities, unemployment, public health crises or other factors beyond our control could further impact these local economic conditions and could further negatively affect the financial results of our banking operations. In addition, deflationary pressures, while possibly lowering our operating costs, could have a significant negative effect on our borrowers, especially our business borrowers, and the values of underlying collateral securing loans, which could negatively affect our financial performance. In the event of severely adverse business and economic conditions generally or specifically in the principal markets in which we conduct business, there can be no assurance that the federal government and the Federal Reserve Board would intervene. If economic conditions worsen or volatility increases, our business, financial condition and results of operations could be materially adversely affected. For more information about our market area, please see the section titled “Business of Needham Bank – Market Area.”

If our allowance for credit losses is not sufficient to cover actual credit losses, our earnings could decrease.

We maintain an allowance for credit losses, which is established through a provision for credit losses that represents management’s best estimate of the current expected losses within the loan portfolio. We make various assumptions and judgments about the collectability of our loan portfolio, including the creditworthiness of our borrowers and the value of the real estate and other assets serving as collateral for the repayment of many of our loans. In determining the amount of the allowance for credit losses, we review our loans and our loss and delinquency experience, and we evaluate economic conditions. If our assumptions or the results of our analyses are incorrect, our allowance for credit losses may not be sufficient to cover losses inherent in our loan portfolio, resulting in additions to our allowance. In addition, our emphasis on loan growth and on increasing our portfolios of commercial real estate loans, as well as any future credit deterioration or changes in economic conditions could require us to increase our allowance for credit losses in the future. At December 31, 2023, our allowance for credit losses was 0.83% of total loans and 298% of non-performing loans. Material additions to our allowance would materially decrease our net income.

We adopted the Current Expected Credit Loss (“CECL”) standard on January 1, 2023. CECL requires financial institutions to determine periodic estimates of lifetime expected credit losses on loans, and recognize the expected credit losses as allowances for credit losses. This has changed the current method of providing allowances for credit losses that are incurred or probable, which has required us to increase our allowance for credit losses, and to greatly increase the types of data we need to collect and review to determine the appropriate level of the allowance for credit losses. Our day one CECL adjustment on January 1, 2023, was $2.1 million, net of tax.

In addition, bank regulators periodically review our allowance for credit losses and, as a result of such reviews, we may be required to increase our provision for credit losses or recognize further loan charge-offs. However, regulatory agencies are not directly involved in the process of establishing the allowance for credit losses, as the process is our responsibility and any adjustment of the allowance is the responsibility of our management. Any increase in our allowance for credit losses or loan charge-offs as a result of such review or otherwise may have a material adverse effect on our financial condition and results of operations.

We provide banking services to customers who do business in the cannabis industry and the strict enforcement of federal laws regarding cannabis would likely result in our inability to continue to provide banking services to these customers and we could have legal action taken against us by the federal government.

We have deposit and loan customers that are licensed in various States to do business in the cannabis industry as growers, processors, and dispensaries. While cannabis is legal in each of these States, it remains classified as a Schedule I controlled substance under the Federal Controlled Substances Act, or CSA. As such, the cultivation, use, distribution, and possession of cannabis is a violation of federal law that is punishable by imprisonment and fines. Moreover, the U.S. Supreme Court ruled in USA v. Oakland Cannabis Buyers’ Coop. that the federal government has the authority to regulate and criminalize cannabis, including medical marijuana.

In January 2018, the U.S. Department of Justice (“DOJ”) rescinded the “Cole Memo” and related memoranda which characterized the enforcement of the CSA against persons and entities complying with state regulatory systems permitting the use, manufacture and sale of medical marijuana as an inefficient use of their prosecutorial resources and

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discretion. The impact of the DOJ’s rescission of the Cole Memo and related memoranda is unclear, but may result in the DOJ increasing its enforcement actions against the regulated cannabis industry generally.

As in past years, the U.S. Congress has enacted an omnibus spending bill that includes a provision prohibiting the DOJ and the U.S. Drug Enforcement Administration from using funds appropriated by that bill to prevent states from implementing their medical-use cannabis laws. This provision was recently renewed as part of the Consolidated Appropriations Act of 2022. While this provision has been re-enacted every year since 2014, and is expected to continue to be re-enacted in future federal spending bills, if Congress and the President fail to further renew the provision, then the ability of medical cannabis businesses to act in this area, and our ability to provide banking products and services to such businesses, may be impeded. Further, the U.S. Court of Appeals for the Ninth Circuit held in USA v. McIntosh that this provision prohibits the DOJ from spending funds from relevant appropriations acts to prosecute individuals who engage in conduct permitted by state medical-use cannabis laws and who strictly comply with such laws. There is no guarantee that the U.S. Congress will extend this provision or that U.S. Federal courts located outside the Ninth Circuit will follow the ruling in USA v. McIntosh. As of the date of filing this Annual Report on Form 10-K, we are aware of no federal or state court in or for Massachusetts that has addressed the merits of the McIntosh ruling.

Federal prosecutors have significant discretion and there can be no assurance that a federal prosecutor in any of the federal districts in which we operate will not choose to strictly enforce the federal laws governing cannabis, including medical-use cannabis, or that any of these federal courts will follow the Ninth Circuit’s ruling in USA v. McIntosh. Any change in the federal government’s enforcement position, could cause us to immediately cease providing banking services to the medical-use cannabis industry in the States where we operate.

Additionally, as the possession and use of cannabis remains illegal under the CSA, we may be deemed to be aiding and abetting illegal activities through the services that we provide to these customers and could have legal action taken against us by the Federal government, including imprisonment and fines. Any change in position or potential action taken against us could result in significant financial damage to us and our stockholders.

The Financial Crimes Enforcement Network (“FinCEN”) published guidelines in 2014 for financial institutions servicing state legal cannabis business. These guidelines were issued for the explicit purpose so “that financial institutions can provide services to marijuana-related businesses in a manner consistent with their obligations to know their customers and to report possible criminal activity.” Needham Bank has and will continue to follow this and other FinCEN guidance in the areas of cannabis banking. Any adverse change in this FinCEN guidance, any new regulations or legislation, any change in existing regulations or oversight, whether a change in regulatory policy or a change in a regulator’s interpretation of a law or regulation, could have a negative impact on our interest income and noninterest income, as well as the cost of our operations, increasing our cost of regulatory compliance and of doing business, and/or otherwise affect us, which may materially affect our profitability.

Environmental liability associated with our lending activities could result in losses.

In the course of business, we may acquire, through foreclosure, properties securing loans originated or purchased that are in default. Particularly in commercial real estate lending, there is a risk that material environmental violations could be discovered on these properties. In this event, we might be required to remedy these violations at the affected properties at our sole cost and expense. The cost of remedial action could substantially exceed the value of affected properties. We may not have adequate remedies against the prior owner or other responsible parties and could find it difficult or impossible to sell the affected properties. These events could have an adverse effect on our financial condition and results of operations.

The foreclosure process may adversely impact our recoveries on non-performing loans.

The judicial foreclosure process is protracted, which delays our ability to resolve non-performing loans through the sale of the underlying collateral. The longer timelines have been the result of additional consumer protection initiatives related to the foreclosure process, increased documentary requirements and judicial scrutiny, and, both voluntary and mandatory programs under which lenders may consider loan modifications or other alternatives to foreclosure. These reasons and the legal and regulatory responses have impacted the foreclosure process and completion

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time of foreclosures for residential mortgage lenders. This may result in a material adverse effect on collateral values and our ability to minimize its losses.

Risks Related to Market Interest Rates

The reversal of the historically low interest rate environment may adversely affect our net interest income and profitability.

Net interest income historically has been, and we anticipate that it will remain, a significant component of our total revenue. A high percentage of our assets and liabilities involve interest-bearing or interest-related instruments. Thus, changes in interest rates have impacted and may continue to impact many areas of our business, including net interest income, both the earnings and volume of interest-earning assets and interest-bearing liabilities, as well as loan delinquency. Interest rates are highly sensitive to many factors that are beyond our control, including global, national, regional and local economic conditions, the effects of disease pandemics such as COVID-19, competitive pressures, and policies of various governmental and regulatory agencies and, in particular, the FOMC. Changes in interest rates have influenced and will continue to influence the interest we receive on loans and securities and the amount of interest we pay on deposits and borrowings, our ability to originate loans and obtain deposits, and the fair value of our financial assets and liabilities. If the interest rates on our interest-bearing liabilities increase at a faster pace than the interest rates on our interest earning assets, our net interest income may decline and, with it, a decline in our earnings may occur. Our net interest income and our earnings would be similarly affected if the interest rates on our interest earning assets declined at a faster pace than the interest rates on our interest-bearing liabilities.

The FOMC raised the target range for the federal funds throughout 2022 and 2023, and additional rate increases may occur if inflation pressures remain elevated or intensify. Increases to the target range for the federal funds rate, combined with ongoing geopolitical instability, could raise the risk of an economic recession and responsive measures, including a reduction of the federal funds rate. Any such downturn may adversely affect our asset quality, deposit levels, loan demand and results of operations.

Higher interest rates generally are associated with a lower volume of loan originations and refinancings, while lower interest rates are usually associated with higher loan originations and refinancings. Our ability to generate gains on sales of mortgage loans is significantly dependent on the level of originations. Cash flows are affected by changes in market interest rates. Generally, in rising interest rate environments, loan prepayment rates are likely to decline, and in falling interest rate environments, loan prepayment rates are likely to increase. A significant amount of our commercial and industrial and commercial real estate, including multi-family residential real estate loans, are adjustable-rate loans and an increase in the general level of interest rates may adversely affect the ability of borrowers, especially those with adjustable rate loans, to pay their loan obligations. Changes in interest rates, prepayment speeds and other factors may also cause the value of our loans held for sale to change.

Although we have implemented risk management strategies, as well as policies and procedures designed to manage the risks associated with changes in market interest rates, changes in interest rates have had and may continue to have an adverse effect on our operating results and financial condition.

If our ongoing assumptions regarding borrower or depositor behavior or overall economic conditions are significantly different than we anticipate, then our risk mitigation may be insufficient to protect against interest rate risk and our operating results and financial condition would be adversely affected.

Changes in interest rates could reduce our profits and asset values.

We derive our income mainly from the difference or “spread” between the interest earned on loans, securities and other interest-earning assets and interest paid on deposits, borrowings and other interest-bearing liabilities. In general, the larger the spread, the more we earn. When market rates of interest change, the interest we receive on our assets and the interest we pay on our liabilities will fluctuate. This can cause decreases in our spread and can adversely affect our income. For the past several years, we have been asset sensitive, which indicates that assets generally reprice

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faster than liabilities. In a rising rate environment, asset sensitivity is preferable as it results in improvement to our net interest margin.

Interest rates also affect how much money we lend. For example, when interest rates rise, the cost of borrowing increases for customers and the Bank’s loan originations tend to decrease. A rising rate environment can also negatively impact the Bank if the higher debt service costs on adjustable-rate loans lead to borrowers’ inability to pay contractual obligations. In addition, changes in interest rates can affect the average life of loans and securities. For example, a reduction in interest rates generally results in increased prepayments of loans and mortgage-backed securities, as borrowers refinance their debt to reduce their borrowing cost. This causes reinvestment risk, because we generally are not able to reinvest prepayments at rates that are comparable to the rates we earned on the prepaid loans or securities in a declining rate environment.

Any substantial, unexpected, prolonged change in market interest rates could have a material adverse effect on our financial condition, liquidity and results of operations. Changes in the level of interest rates also may negatively affect the value of our assets, including the value of our available-for-sale investment securities, which generally decrease when market interest rates rise, and ultimately affect our earnings. During the year ended December 31, 2023, we incurred other comprehensive income of $3.3 million, primarily related to net changes in unrealized holding gains (losses) in the available-for-sale investment securities portfolio.

Changes in the level of interest rates also may negatively affect our ability to originate real estate loans, the value of our assets, and our ability to realize gains from the sale of our assets, all of which ultimately affect our earnings. Also, our interest rate risk modeling techniques and assumptions likely may not fully predict or capture the impact of actual interest rate changes on our balance sheet or projected operating results. See “Management’s Discussion and Analysis of Financial Condition and Results of Operations – Management of Market Risk.”

Hedging against interest rate exposure may adversely affect our earnings.

On occasion we have employed various financial risk methodologies that limit, or “hedge,” the adverse effects of rising or decreasing interest rates on our loan portfolios and short-term liabilities. We also engage in hedging strategies with respect to arrangements where our customers swap floating interest rate obligations for fixed interest rate obligations, or vice versa. Our hedging activity varies based on the level and volatility of interest rates and other changing market conditions. There are no perfect hedging strategies, and interest rate hedging may fail to protect us from loss. Moreover, hedging activities could result in losses if the event against which we hedge does not occur. Additionally, interest rate hedging could fail to protect us or adversely affect us because, among other things:

● the duration of the hedge may not match the duration of the related liability;

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Risks Related to Economic Conditions

Inflation can have an adverse impact on our business and on our customers.

Inflation risk is the risk that the value of assets or income from investments will be worth less in the future as inflation decreases the value of money. Recently, there has been a rise in inflation and the Federal Reserve Board has raised certain benchmark interest rates in an effort to combat inflation. As discussed above under “– Risks Related to Market Interest Rates – Changes in interest rates could reduce our profits and asset values,” as inflation increases and market interest rates rise, the value of our investment securities, particularly those with longer maturities, would decrease, although this effect can be less pronounced for floating rate instruments. In addition, inflation generally increases the cost of goods and services we use in our business operations, such as electricity and other utilities, which increases our noninterest expenses. Furthermore, our customers are also affected by inflation and the rising costs of goods and services used in their households and businesses, which could have a negative impact on their ability to repay their loans with us.

A worsening of economic conditions in our market area could reduce demand for our products and services and/or result in increases in our level of non-performing loans, which could adversely affect our operations, financial condition and earnings.

Local and regional economic conditions have a significant impact on the ability of our borrowers to repay loans and the value of the collateral securing loans. A deterioration in economic conditions, especially local conditions, could have the following consequences, any of which could have a material adverse effect on our business, financial condition, liquidity and results of operations, and could more negatively affect us compared to a financial institution that operates with more geographic diversity:

● demand for our products and services may decline;

● loan delinquencies, problem assets and foreclosures may increase;

Moreover, a significant decline in general economic conditions caused by inflation, recession, acts of terrorism, civil unrest, an outbreak of hostilities or other international or domestic calamities, an epidemic or pandemic, unemployment or other factors beyond our control could further impact these local economic conditions and could further negatively affect the financial results of our banking operations. In addition, deflationary pressures, while possibly lowering our operating costs, could have a significant negative effect on our borrowers, especially our business borrowers, and the values of underlying collateral securing loans, which could negatively affect our financial performance.

Further, a U.S. government debt default would have a material adverse impact on our business and financial performance, including a decrease in the value of U.S. Treasury securities and other government securities held by us, which could negatively impact our capital position and our ability to meet regulatory requirements. Other negative impacts could be volatile capital markets, an adverse impact on the U.S. economy and the U.S. dollar, as well as increased default rates among borrowers in light of increased economic uncertainty. Some of these impacts might occur even in the absence of an actual default but as a consequence of extended political negotiations around the threat of such a default and a government shutdown.

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We have a high concentration of loans secured by real estate in our market area. Adverse economic conditions, both generally and in our market area, could adversely affect our financial condition and results of operations.

The majority of our loans are inside of our primary market area and, as a result, we have a greater risk of loan defaults and losses in the event of a further economic downturn in our market area, as adverse economic conditions may have a negative effect on the ability of our borrowers to make timely payments of their loans. A return of recessionary conditions and/or negative developments in the domestic and international credit markets may significantly affect the markets in which we do business, the value of our loans, investments, and collateral securing our loans, and our ongoing operations, costs and profitability. Any of these negative events may result in higher-than-expected loan delinquencies, increase our levels of nonperforming and classified assets, and reduce demand for our products and services, which may cause us to incur losses and may adversely affect our capital, liquidity and financial condition.

Adverse developments affecting the financial services industry, such as actual events or concerns involving liquidity, defaults, or non-performance by financial institutions or transactional counterparties, could adversely affect our financial condition and results of operations.

Actual events involving limited liquidity, defaults, non-performance or other adverse developments that affect financial institutions, transactional counterparties or other companies in the financial services industry or the financial services industry generally, or concerns or rumors about any events of these kinds or other similar risks, have in the past and may in the future lead to market-wide liquidity problems. For example, on May 1, 2023, First Republic Bank went into receivership and its deposits and substantially all of its assets were acquired by JPMorgan Chase Bank, National Association. Similarly, on March 10, 2023, Silicon Valley Bank went into receivership, and on March 12, 2023, Signature Bank went into receivership.

Inflation and rapid increases in interest rates have led to a decline in the trading value of previously issued government securities with interest rates below current market interest rates. Although the Treasury, FDIC and Federal Reserve Board have announced a program to provide up to $25 billion of loans to financial institutions secured by certain of such government securities held by financial institutions to mitigate the risk of potential losses on the sale of such instruments, widespread demands for customer withdrawals or other liquidity needs of financial institutions for immediately liquidity may exceed the capacity of such program. Additionally, there is no guarantee that the Treasury, FDIC and Federal Reserve Board will provide access to uninsured funds in the future in the event of the closure of other banks or financial institutions, or that they would do so in a timely fashion.

Our securities portfolio performance in difficult market conditions could have adverse effects on our results of operations.

Unrealized losses on investment securities result from changes in credit spreads and liquidity issues in the marketplace, along with changes in the credit profile of individual securities issuers. Under GAAP, we are required to review our investment portfolio periodically for the presence of credit losses of our securities, taking into consideration current and future market conditions, the extent and nature of changes in fair value, issuer rating changes and trends, volatility of earnings, current analysts’ evaluations, our ability and intent to hold investments until a recovery of fair value, as well as other factors. Adverse developments with respect to one or more of the foregoing factors may require us to deem particular securities to be impaired, with the credit-related portion of the reduction in the value recognized as a charge to our earnings through an allowance. Subsequent valuations, in light of factors prevailing at that time, may result in significant changes in the values of these securities in future periods. Any of these factors could require us to recognize further impairments in the value of our securities portfolio, which may have an adverse effect on our results of operations in future periods.

The fair value of our investment securities can fluctuate due to factors outside of our control.

Factors beyond our control can significantly influence the fair value of securities in our portfolio and can cause potential adverse changes to the fair value of these securities. These factors include, but are not limited to, rating agency actions with respect to individual securities, defaults by the issuer or with respect to the underlying securities, and changes in market interest rates and continued instability in the capital markets. Any of these factors, among others,

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could cause credit losses and realized and/or unrealized losses in future periods and declines in other comprehensive income, which could materially and adversely affect our business, results of operations, financial condition and prospects. The process for determining whether impairment of a security is related to credit usually requires complex, subjective judgments about the future financial performance and liquidity of the issuer and any collateral underlying the security in order to assess the probability of receiving all contractual principal and interest payments on the security. Significant negative changes to valuations could result in credit losses on our securities portfolio, which could have an adverse effect on our financial condition or results of operations. As of December 31, 2023, we had approximately $11.9 million of accumulated other comprehensive losses. During the year ended December 31, 2023, we had $2.5 million of after-tax other comprehensive income, which resulted primarily from $3.7 million in unrealized valuation gains on available-for-sale investment securities.

Potential downgrades of U.S. government securities by one or more of the credit ratings agencies could have a material adverse effect on our operations, earnings and financial condition.

A possible future downgrade of the sovereign credit ratings of the U.S. government and a decline in the perceived creditworthiness of U.S. government-related obligations could impact our ability to obtain funding that is collateralized by affected instruments, as well as affect the pricing of that funding when it is available. A downgrade may also adversely affect the market value of such instruments. We cannot predict if, when or how any changes to the credit ratings or perceived creditworthiness of these organizations will affect economic conditions. Such ratings actions could result in a significant adverse impact on us. Among other things, a downgrade in the U.S. government’s credit rating could adversely impact the value of our securities portfolio and may trigger requirements that we post additional collateral for trades relative to these securities. A downgrade of the sovereign credit ratings of the U.S. government or the credit ratings of related institutions, agencies or instruments would significantly exacerbate the other risks to which we are subject and any related adverse effects on the business, financial condition and results of operations.

The soundness of other financial institutions could adversely affect us.

Our ability to engage in routine funding transactions could be adversely affected by the actions and commercial soundness of other financial institutions. Financial services institutions are interrelated as a result of trading, clearing, counterparty and other relationships. We have exposure to many different counterparties, and we routinely execute transactions with counterparties in the financial industry, including brokers and dealers, other commercial banks, investment banks, mutual and hedge funds, and other financial institutions. As a result, defaults by, or even rumors or questions about, one or more financial services institutions, or the financial services industry generally, could lead to market-wide liquidity problems and losses or defaults by us or by other institutions and organizations. Many of these transactions expose us to credit risk in the event of default of our counterparty or client. In addition, our credit risk may be exacerbated when the collateral held by us cannot be liquidated or is liquidated at prices not sufficient to recover the full amount of the financial instrument exposure due to us. There is no assurance that any such losses would not materially and adversely affect our results of operations.

Risks Related to Our Funding

Our inability to generate core deposits may cause us to rely more heavily on wholesale funding strategies for funding and liquidity needs, which could have an adverse effect on our net interest margin and profitability.

We must maintain sufficient funds to respond to the needs of depositors and borrowers. Deposits have traditionally been our primary source of funds for use in lending and investment activities. We also receive funds from loan repayments, investment maturities and income on other interest-earning assets. While we emphasize generating transaction accounts, we cannot guarantee if and when this will occur. Further, the considerable competition for deposits in our market area also has made, and may continue to make, it difficult for us to obtain reasonably priced deposits. Moreover, deposit balances can decrease if customers perceive alternative investments as providing a better risk/return tradeoff. If we are not able to increase our lower-cost transactional deposits at a level necessary to fund our asset growth or deposit outflows, we may be forced seek other sources of funds, including other certificates of deposit, FHLB advances, brokered deposits and lines of credit to meet the borrowing and deposit withdrawal requirements of our customers, which may be more expensive and have an adverse effect on our net interest margin and profitability. In

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addition, if our capital levels fell such that we were no longer considered “well capitalized,” under federal law we would be subject to restrictions on accepting brokered deposits and on paying above-market rates for deposits. Additionally, if, based on a decrease in our tangible equity, the FHLB were to determine that we have inadequate capital levels, in its discretion, it may limit our ability to utilize FHLB advances.

Additionally, through our April 2022 purchase of cannabis-related and money service businesses from another financial institution, we acquired approximately $297.7 million of deposits. Of this total, approximately $316.0 million are cannabis-related deposits, directly involved in growing, transporting, packaging, distributing, or selling cannabis (that “touch” cannabis along the distribution chain), as of December 31, 2023. Due to the unique industry-specific risks of this business, if we were forced to terminate this business line, we could lose many or most of these deposits, all of which are core deposits.

Our funding sources may prove insufficient to replace deposits at maturity and support our future growth.

We must maintain sufficient funds to respond to the needs of depositors and borrowers. As a part of our liquidity management, we use a number of funding sources in addition to core deposit growth and repayments and maturities of loans and investments. As we continue to grow, we are likely to become more dependent on these sources, which may include FHLB advances, proceeds from the sale of loans, federal funds purchased and brokered certificates of deposit. Adverse operating results or changes in industry conditions could lead to difficulty or an inability to access these additional funding sources. Our financial flexibility will be severely constrained if we are unable to maintain our access to funding or if adequate financing is not available to accommodate future growth at acceptable interest rates. If we are required to rely more heavily on more expensive funding sources to support future growth, our revenues may not increase proportionately to cover our costs. In this case, our operating margins and profitability would be adversely affected.

Risks Related to Laws and Regulations

Changes in laws and regulations and the cost of regulatory compliance with new laws and regulations may adversely affect our operations and/or increase our costs of operations.

Needham Bank is subject to extensive regulation, supervision and examination by the Commissioner and the Federal Reserve Board, and, also by the FDIC as insurer of Needham Bank’s deposit accounts and NB Bancorp is subject to extensive regulation, supervision and examination by the Federal Reserve Board. Such regulation and supervision govern the activities in which an institution and its holding company may engage and are intended primarily for the protection of the federal deposit insurance fund and the depositors of Needham Bank, rather than for our stockholders. Regulatory authorities have extensive discretion in their supervisory and enforcement activities, including the imposition of restrictions on our operations, the classification of our assets and determination of the adequacy of the level of our allowance for credit losses. These regulations, along with existing tax, accounting, securities, insurance and monetary laws, rules, standards, policies, and interpretations, control the methods by which financial institutions conduct business, implement strategic initiatives and tax compliance, and govern financial reporting and disclosures. Any change in such regulation and oversight, whether in the form of regulatory policy, regulations, legislation or supervisory action, may have a material impact on our operations.

Our cannabis-related business, money service business and ATM business present compliance risks that are different in kind or degree compared to those that we are accustomed to managing and have required us to implement new or enhance existing procedures, systems and controls.

Our April 2022 acquisition resulted in our operation of three different business lines that are new to us and have necessitated robust compliance policies and procedures in order to comply with various laws and regulations. We provide depository services to cannabis businesses, including cannabis retailers and cannabis cultivators. We also provide loans to various cannabis-related businesses. We also provide depository services to money service businesses and ATM businesses.

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These acquired portfolios are mature portfolios which have been previously reviewed and managed by the management team and employees now employed by Needham Bank who were previously employed by the selling institution. However, these business lines are relatively new to Needham Bank and have required and we expect will continue to require, proportionately greater compliance and risk management resources than our other business lines in order for us to comply with laws and regulations related to the prevention of financial crimes and combating terrorism, including the U.S. Patriot Act of 2001. These laws and regulations require us to, among other things, implement specific policies and procedures related to those business lines, including enhanced licensing procedures and policies, and anti-money laundering, anti-bribery and corruption, fraud, compliance, suspicious activities, currency transaction reporting, and due diligence on new and existing customers.

With respect to cannabis-related businesses, the Controlled Substances Act makes it illegal under federal law to manufacture, distribute, or dispense cannabis, and therefore federal law, including the money laundering statutes and the Bank Secrecy Act, apply to cannabis-related conduct. Financial transactions involving proceeds generated by cannabis-related conduct can form the basis for prosecution under the money laundering statutes. Financial institutions must report currency transactions and conduct suspicious activity monitoring and reporting in connection with cannabis-related businesses to FinCEN.

Our ability to comply with anti-money laundering laws and our reporting obligations to FinCEN depend on our ability to maintain robust customer due diligence, surveillance, detection, reporting and analytic capabilities. Although we believe that we have policies, systems and procedures designed to comply with these laws and regulations, to the extent our policies or procedures are not fully effective or do not meet heightened regulatory standards or expectations, we may be subject to fines, penalties, restrictions on certain activities including future acquisitions, reputational harm, or other adverse consequences from our federal bank regulators, the Department of Justice or FinCEN.

Non-compliance with the USA PATRIOT Act, Bank Secrecy Act, or other laws and regulations could result in fines or sanctions.

The USA PATRIOT and Bank Secrecy Acts require financial institutions to develop programs to prevent financial institutions from being used for money laundering and terrorist activities. If such activities are suspected, financial institutions are obligated to file suspicious activity reports with FinCEN. These rules require financial institutions to establish procedures for identifying and verifying the identity of customers seeking to open new financial accounts. Failure to comply with these regulations could result in fines or sanctions, including restrictions on pursuing acquisitions or establishing new branches. The policies and procedures we have adopted that are designed to assist in compliance with these laws and regulations may not be effective in preventing violations of these laws and regulations. Furthermore, these rules and regulations continue to evolve and expand.

Monetary policies and regulations of the Federal Reserve Board could adversely affect our business, financial condition and results of operations.

In addition to being affected by general economic conditions, our earnings and growth are affected by the policies of the Federal Reserve Board. An important function of the Federal Reserve Board is to regulate the money supply and credit conditions. Among the instruments used by the Federal Reserve Board to implement these objectives are open market purchases and sales of U.S. government securities, adjustments of the discount rate and changes in banks’ reserve requirements against bank deposits. These instruments are used in varying combinations to influence overall economic growth and the distribution of credit, bank loans, investments and deposits. Their use also affects interest rates charged on loans or paid on deposits.

The monetary policies and regulations of the Federal Reserve Board have had a significant effect on the operating results of financial institutions in the past and are expected to continue to do so in the future. The effects of such policies upon our business, financial condition and results of operations cannot be predicted.

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We are subject to stringent capital requirements, which may adversely impact our return on equity, require us to raise additional capital, or limit our ability to pay dividends or repurchase shares.

Federal regulations establish minimum capital requirements for insured depository institutions, including minimum risk-based capital and leverage ratios, and define “capital” for calculating these ratios. The minimum capital requirements are: (1) a common equity Tier 1 capital ratio of 4.5%; (2) a Tier 1 to risk-based assets capital ratio of 6%; (3) a total capital ratio of 8%; and (4) a Tier 1 leverage ratio of 4%. The regulations also establish a “capital conservation buffer” of 2.5%, which results in the following minimum ratios: (1) a common equity Tier 1 capital ratio of 7.0%; (2) a Tier 1 to risk-based assets capital ratio of 8.5%; and (3) a total capital ratio of 10.5%. An institution will be subject to limitations on paying dividends, engaging in share repurchases and paying discretionary bonuses if its capital level falls below the capital conservation buffer amount.

The application of these capital requirements could, among other things, result in lower returns on equity, and result in regulatory actions if we are unable to comply with such requirements. Needham Bank’s ability to pay dividends to NB Bancorp would be limited if it does not maintain the capital conservation buffer required by the capital rules, which may limit NB Bancorp’s ability to pay dividends to its stockholders. See “Supervision and Regulation – Banking Regulation – Capital Requirements.”

We are an emerging growth company, and any decision on our part to comply only with certain reduced reporting and disclosure requirements applicable to emerging growth companies could make our common stock less attractive to investors.

NB Bancorp is an emerging growth company, and we expect we will cease to be an emerging growth company at the end of the fiscal year following the fifth anniversary of the completion of the offering (i.e., December 31, 2028). For as long as we continue to be an emerging growth company, we may choose to take advantage of exemptions from various reporting requirements applicable to other public companies, including, but not limited to, reduced disclosure obligations regarding executive compensation in our periodic reports and proxy statements, and exemptions from the requirements of holding a non-binding advisory vote on executive compensation and shareholder approval of any golden parachute payments not previously approved. We have also elected to use the extended transition period to delay adoption of new or revised accounting pronouncements applicable to public companies until such pronouncements are made applicable to private companies. Accordingly, our financial statements may not be comparable to the financial statements of public companies that comply with such new or revised accounting standards. Investors may find our common stock less attractive since we have chosen to rely on these exemptions. If some investors find our common stock less attractive as a result of any choices to reduce future disclosure, there may be a less active trading market for our common stock and the price of our common stock may be more volatile.

If our deposits grow too large, we may lose the benefits of excess deposit insurance provided by the Depositors Insurance Fund.

The deposits of Needham Bank are insured in full beyond federal deposit insurance coverage limits by the Depositors Insurance Fund (“DIF”) a private excess deposit insurer created under Massachusetts law. We believe offering full deposit insurance gives us a competitive advantage for individual, corporate and municipal depositors having deposit balances in excess of FDIC insurance limits. However, the DIF may require member institutions that pose greater than normal loss exposure risk to the DIF to take certain risk-mitigating measures or withdraw from the DIF and become a Massachusetts trust company by operation of law, subject to the Commissioner’s approval. In such an event, an institution may be required to reduce its level of excess deposits, pay for the reinsurance of excess deposits, make an additional capital contribution to the DIF, provide collateral or take other risk-mitigating measures that the DIF may require, which may include entering into reciprocal deposit programs with other financial institutions or reciprocal deposit services. Reducing excess deposits by taking any of the above risk-mitigating measures, which allows deposits to run off, reduces our overall level of deposits and increases the extent to which we may need to rely in the future on other, more expensive or less stable sources for funding, including FHLB advances, which would reduce net income. Shifting excess deposits into reciprocal deposit programs may result in higher funding costs, which also would reduce net income.

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The Federal Reserve Board may require us to commit capital resources to support our banksubsidiary.

Federal law requires that a holding company act as a source of financial and managerial strength to its subsidiary bank and to commit resources to support such subsidiary bank. Under the “source of strength” doctrine, the Federal Reserve Board may require a holding company to make capital injections into a troubled subsidiary bank and may charge the holding company with engaging in unsafe and unsound practices for failure to commit resources to a subsidiary bank. A capital injection may be required at times when the holding company may not have the resources to provide it and therefore may be required to borrow the funds or raise capital. Thus, any borrowing or funds needed to raise capital required to make a capital injection becomes more difficult and expensive and could have an adverse effect on our business, financial condition and results of operations.

We may become subject to enforcement actions even though noncompliance was inadvertentor unintentional.

The financial services industry is subject to intense scrutiny from bank supervisors in the examination process and aggressive enforcement of federal and state regulations, particularly with respect to mortgage-related practices and other consumer compliance matters, and compliance with anti-money laundering, Bank Secrecy Act and Office of Foreign Assets Control regulations, and economic sanctions against certain foreign countries and nationals. Enforcement actions may be initiated for violations of laws and regulations and unsafe or unsound practices. We maintain systems and procedures designed to ensure that we comply with applicable laws and regulations; however, some legal/regulatory frameworks provide for the imposition of fines or penalties for noncompliance even though the noncompliance was inadvertent or unintentional and even though there was in place at the time systems and procedures designed to ensure compliance. Failure to comply with these and other regulations, and supervisory expectations related thereto, may result in fines, penalties, lawsuits, regulatory sanctions, reputation damage, or restrictions on our business.

We face significant legal risks, both from regulatory investigations and proceedings and from private actions brought against us.

As a participant in the financial services industry, many aspects of our business involve substantial risk of legal liability. From time to time, customers and others make claims and take legal action pertaining to the performance of our responsibilities. Whether customer claims and legal action related to the performance of our responsibilities are founded or unfounded, if such claims and legal actions are not resolved in a manner favorable to us, they may result in significant expenses, attention from management and financial liability. Any financial liability or reputational damage could have a material adverse effect on our business, which, in turn, could have a material adverse effect on our financial condition and results of operations. There is no assurance that litigation with private parties will not increase in the future. Actions currently pending against us may result in judgments, settlements, fines, penalties or other results adverse to us, which could materially adversely affect our business, financial condition or results of operations, or cause serious reputational harm to us.

Risks Related to our Business Strategy

Our business strategy includes growth, and our financial condition and results of operations could be negatively affected if we fail to grow or fail to manage our growth effectively. Growing our operations could also cause our expenses to increase faster than our revenues.

Our business strategy includes growth in assets, deposits and the scale of our operations. Achieving such growth will require us to attract customers that currently bank at other financial institutions in our market area. Our ability to successfully grow will depend on a variety of factors, including our ability to attract and retain experienced bankers, the continued availability of desirable business opportunities and the level of competition from other financial institutions. Growth opportunities may not be available or we may not be able to manage our growth successfully. If we do not manage our growth effectively, our financial condition and operating results could be negatively affected. Furthermore, there can be considerable costs involved in expanding lending capacity, and generally a period of time is required to generate the necessary revenues to offset these costs, especially in areas in which we do not have an established presence. Accordingly, any such business expansion can be expected to negatively impact our earnings until certain economies of scale are reached.

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Our continued pace of growth may require us to raise additional capital in the future, but that capital may not be available when it is needed.

We are required by banking regulatory authorities to maintain adequate levels of capital to support our operations. We may at some point need to raise additional capital to support our continued growth. If we raise capital through the issuance of additional shares of our common stock or other securities, it would dilute the ownership interests of stockholders and may dilute the per share book value of our common stock. New investors may also have rights, preferences and privileges senior to our current stockholders, which may adversely impact our current stockholders. Also, the need to raise additional capital may force our management to spend more time in managerial and financing-related activities than in operational activities.

Our ability to raise additional capital, if needed, will depend on conditions in the capital markets at that time, which are outside of our control, and on our financial performance. Accordingly, we may not be able to raise additional capital, if needed, with favorable terms. If we cannot raise additional capital when needed, our ability to further expand our operations through internal growth and acquisitions could be materially impaired.

We depend on our management team to implement our business strategy and execute successful operations and we could be harmed by the loss of their services.

We depend on the services of the members of our senior management team who direct our strategy and operations. Our executive officers and lending personnel possess substantial expertise, extensive knowledge of our markets and key business relationships. Any one of them could be difficult to replace. Additionally, in recent years, we have grown our Structured Finance loan portfolio significantly, including through lending relationships to cannabis, wind and solar companies. These industries can entail unique regulatory and operational risks and we believe we have experienced team members who are able to understand and assess these risks when originating and managing these relationships. Our loss of these persons, or our inability to hire additional qualified personnel, could impact our ability to implement our business strategy and could have a material adverse effect on our results of operations and our ability to compete in our markets.

Development of new products and services may impose additional costs on us and may expose us to increased operational risk.

The introduction of new products and services can entail significant time and resources, including regulatory approvals. Substantial risks and uncertainties are associated with the introduction of new products and services, including technical and control requirements that may need to be developed and implemented, rapid technological change in the industry, our ability to access technical and other information from its clients, the significant and ongoing investments required to bring new products and services to market in a timely manner at competitive prices and the preparation of marketing, sales and other materials that fully and accurately describe the product or service and its underlying risks. Our failure to manage these risks and uncertainties also exposes it to enhanced risk of operational lapses which may result in the recognition of financial statement liabilities. Regulatory and internal control requirements, capital requirements, competitive alternatives, vendor relationships and shifting market preferences may also determine if such initiatives can be brought to market in a manner that is timely and attractive to our clients. Products and services relying on internet and mobile technologies may expose us to fraud and cybersecurity risks. Failure to successfully manage these risks in the development and implementation of new products or services could have a material adverse effect on our business and reputation, as well as on its consolidated results of operations and financial condition.

Risks Related to Competitive Matters

Strong competition within our market area may limit our growth and profitability.

Competition in the banking and financial services industry is intense. We compete with commercial banks, savings institutions, mortgage brokerage firms, credit unions, finance companies, mutual funds, insurance companies, brokerage and investment banking firms, financial technology or “fintech companies,” and unregulated or less regulated non-banking entities. Many of these competitors are substantially larger than we are and have substantially greater

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resources and higher lending limits than we have and offer certain services that we do not or cannot provide. In addition, some of our competitors offer loans with lower interest rates and/or more attractive terms than loans we offer. Competition also makes it increasingly difficult and costly to attract and retain qualified employees. We expect competition to increase in the future as a result of legislative, regulatory and technological changes and the continuing trend of consolidation in the financial services industry. Our profitability depends upon our continued ability to successfully compete for business and qualified employees in our market areas. The greater resources and deposit and loan products offered by some of our competitors may limit our ability to increase our interest-earning assets.

Risks Related to Operational Matters

We face significant operational risks because of our reliance on technology. Our information technology systems may be subject to failure, interruption or security breaches.

Information technology systems are critical to our business. Our business requires us to collect, process, transmit and store significant amounts of confidential information regarding our customers, employees and our own business, operations, plans and business strategies. We use various technology systems to manage our customer relationships, general ledger, investments, deposits, and loans. Our computer systems, data management and internal processes, as well as those of third parties, are integral to our performance. Our operational risks include the risk of malfeasance by employees or persons outside our company, errors relating to transaction processing and technology, systems failures or interruptions, breaches of our internal control systems and compliance requirements, and business continuation and disaster recovery. There have been increasing efforts by third parties to breach data security at financial institutions. Such attacks include computer viruses, malicious or destructive code, phishing attacks, denial of service or information or other security breaches that could result in the unauthorized release, gathering, monitoring, misuse, loss or destruction of confidential, proprietary and other information, damages to systems, or other material disruptions to network access or business operations. We have established policies and procedures to prevent or limit the impact of system failures, interruptions and security breaches, including privacy breaches and cyber-attacks. Although we take protective measures and believe that we have not experienced any of the data breaches described above, the security of our computer systems, software, and networks may be vulnerable to breaches, unauthorized access, misuse, computer viruses, or other malicious code and cyber-attacks that could have an impact on information security. Because the techniques used to cause security breaches change frequently, we may be unable to proactively address these techniques or to implement adequate preventative measures.

In the event of a breakdown in our internal control systems, improper operation of systems or improper employee actions, or a breach of our security systems, including if confidential or proprietary information were to be mishandled, misused or lost, we could suffer financial loss, loss of customers and damage to our reputation, and face regulatory action or civil litigation. Any of these events could have a material adverse effect on our financial condition and results of operations. Insurance coverage may not be available for such losses, or where available, such losses may exceed insurance limits.

We outsource critical operations to third-party service providers. Systems failures, interruptions and cybersecurity breaches could have a material adverse effect on us.

We outsource a majority of our data processing requirements to third-party providers. Accordingly, our operations are exposed to the risk that these vendors will not perform in accordance with our contractual agreements with them, or we also could be adversely affected if such an agreement is not renewed by the third-party vendor or is renewed on terms less favorable to us. If our third-party providers encounter difficulties, or if we have difficulty communicating with those service providers, our ability to adequately process and account for transactions could be affected, and our business operations could be adversely affected, which could have a material adverse effect on our financial condition and results of operations. Threats to information security also exist in the processing of customer information through various other vendors and their personnel, and our third-party service providers may be vulnerable to unauthorized access, computer viruses, phishing schemes and other security breaches. We may have to expend additional resources to protect against the threat of such security breaches and computer viruses, or to alleviate problems caused by such security breaches or viruses. To the extent that the activities of our third-party service providers or the activities of our customers involve the storage and transmission of confidential information, security breaches and

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viruses could expose us to claims, regulatory scrutiny, litigation costs and other possible liabilities. To our knowledge, the services and programs provided to us by third parties have not experienced any material security breaches. However, the existence of cyber-attacks or security breaches at third parties with access to our data, such as vendors, may not be disclosed to us in a timely manner.

Our business may be adversely affected by an increasing prevalence of fraud and other financial crimes.

Our loans to businesses and individuals and our deposit relationships and related transactions are subject to exposure to the risk of loss due to fraud and other financial crimes. Nationally, reported incidents of fraud and other financial crimes have increased. To our knowledge, we have not experienced material losses due to apparent fraud or other financial crimes. While we have policies and procedures designed to prevent such losses, losses may still occur.

Risks Related to Accounting Matters

Changes in management’s estimates and assumptions may have a material impact on our consolidated financial statements and our financial condition or operating results.

In preparing this Annual Report as well as other periodic reports we are required to file under the Exchange Act, including our consolidated financial statements, our management is required under applicable rules and regulations to make estimates and assumptions as of a specified date. These estimates and assumptions are based on management’s best estimates and experience as of that date and are subject to substantial risk and uncertainty. Materially different results may occur as circumstances change and additional information becomes known. The area requiring significant estimates and assumptions by management include our evaluation of the adequacy of our allowance for credit losses.

Changes in accounting standards could affect reported earnings.

The regulatory bodies responsible for establishing accounting standards, including the Financial Accounting Standards Board, the SEC and other regulatory bodies, periodically change the financial accounting and reporting guidance that governs the preparation of our financial statements. These changes can be hard to predict and can materially impact how we record and report our financial condition and results of operations. In some cases, we could be required to apply new or revised guidance retroactively.

Other Risks Related to Our Business

We operate as a community bank and our ability to maintain our reputation, which is critical to the success of our business, may materially adversely affect our performance.

We are a community bank, and our reputation is one of the most valuable components of our business. A key component of our business strategy is to rely on our reputation for customer service and knowledge of local markets to expand our presence by capturing new business opportunities from existing and prospective customers in our market area and contiguous areas. Threats to our reputation can come from many sources, including adverse sentiment about financial institutions generally, unethical practices, employee misconduct, failure to deliver minimum standards of service or quality, compliance deficiencies, cybersecurity incidents and questionable or fraudulent activities of our customers. Negative publicity regarding our business, employees, or customers, with or without merit, may result in the loss of customers and employees, costly litigation and increased governmental regulation, any or all of which could adversely affect our business and operating results.

The cost of additional finance and accounting systems, procedures and controls in order to satisfy our new public company reporting requirements will increase our expenses.

As a result of the completion of our initial public offering in December 2023, we became a public reporting company. The obligations of being a public company, including the substantial public reporting obligations, require significant expenditures and place additional demands on our management team. Any failure to achieve and maintain an effective internal control environment could have a material adverse effect on our business and stock price. In addition,

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we may need to hire additional compliance, accounting and financial staff with appropriate public company experience and technical knowledge, and we may not be able to do so in a timely fashion. As a result, we may need to rely on outside consultants to provide these services for us until qualified personnel are hired. These obligations will increase our operating expenses and could divert our management’s attention from our operations.

Societal responses to climate change could adversely affect our business and performance, including indirectly through impacts on our customers.

Concerns over the long-term impacts of climate change have led and will continue to lead to governmental efforts around the world to mitigate those impacts. Consumers and businesses also may change their behavior as a result of these concerns. We and our customers will need to respond to new laws and regulations as well as consumer and business preferences resulting from climate change concerns. The impact on our customers will likely vary depending on their specific attributes, including reliance on or role in carbon intensive activities. Among the impacts to us could be a decrease in demand for our products and services, particularly in certain sectors. In addition, we could face reductions in creditworthiness on the part of some customers or in the value of assets securing loans. Our efforts to take these risks into account in making lending and other decisions, including by increasing our business with climate-friendly companies, may not be effective in protecting us from the negative impact of new laws and regulations or changes in consumer or business behavior.

Various factors may make takeover attempts more difficult to achieve.

Certain provisions of our articles of incorporation and bylaws and federal and state banking laws, including regulatory approval requirements, could make it more difficult for a third party to acquire control of NB Bancorp without our board of directors’ approval. Massachusetts and federal regulations applicable to the conversion state that for a period of three years following completion of our conversion, no person may offer to acquire or acquire beneficial ownership of more than 10% of our common stock without prior approval of the Federal Reserve Board. Under federal law, subject to certain exemptions, a person, entity or group must notify the Federal Reserve Board and receive the Federal Reserve Board’s non-objection before acquiring control of a bank holding company. There also are provisions in our articles of incorporation and bylaws that we may use to delay or block a takeover attempt, including a provision that prohibits any person from voting more than 10% of our outstanding shares of common stock. Furthermore, shares of restricted stock and stock options that we may grant to employees and directors, stock ownership by our management and directors and other factors may make it more difficult for companies or persons to acquire control of NB Bancorp without the consent of our board of directors, and may increase the cost of an acquisition. Taken as a whole, these statutory or regulatory provisions and provisions in our articles of incorporation and bylaws could result in NB Bancorp being less attractive to a potential acquirer and therefore could adversely affect the market price of our common stock.

Our articles of incorporation provide that, subject to limited exception, state and federal courts in the State of Maryland are the sole and exclusive forum for certain stockholder litigation matters, which could limit our stockholders’ ability to obtain a favorable judicial forum for disputes with us or our directors, officers, and other employees.

The articles of incorporation of NB Bancorp provide that, unless NB Bancorp consents in writing to the selection of an alternative forum, the sole and exclusive forum for (i) any derivative action or proceeding brought on behalf of NB Bancorp, (ii) any action asserting a claim of breach of a fiduciary duty owed by any director, officer or other employee of NB Bancorp to NB Bancorp or its stockholders, (iii) any action asserting a claim arising pursuant to any provision of the Maryland General Corporation Law, or (iv) any action asserting a claim governed by the internal affairs doctrine will be conducted in a state or federal court located within the State of Maryland, in all cases subject to the court having personal jurisdiction over the indispensable parties named as defendants. This exclusive forum provision does not apply to claims arising under the federal securities laws. This exclusive forum provision may limit a stockholder’s ability to bring a claim in a judicial forum it finds favorable for disputes with NB Bancorp and its directors, officers, and other employees or may cause a stockholder to incur additional expense by having to bring a claim in a judicial forum that is distant from where the stockholder resides, or both. In addition, if a court were to find this exclusive forum provision to be inapplicable or unenforceable in a particular action, we may incur additional costs

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associated with resolving the action in another jurisdiction, which could have a material adverse effect on our financial condition and results of operations.

ITEM 1B. Unresolved Staff Comments

None.

ITEM 1C. Cybersecurity

The Company recognizes the importance of cybersecurity and the potential risks posed to our business operations, financial performance, and reputation. Cybersecurity is a significant and integrated component of the Company’s risk management strategy. As a financial services company, cyber threats are present and growing, and the potential exists for a cybersecurity incident to occur, which could disrupt business operations or compromise sensitive data. To date, the Company has not, to its knowledge, experienced an incident materially affecting or reasonably likely to materially affect the Company. Cybersecurity risks and threats include, but are not limited to, unauthorized access, use, disclosure, modification, or destruction of our information systems, data, or network; denial of service attacks; malware; ransomware; phishing; social engineering; and cyberattacks by hackers, state-sponsored actors, or other malicious third parties and is compounded by the advent and availability of artificial intelligence (“AI”) tools.

To prepare and respond to incidents, the Company has implemented a multi-layered cybersecurity strategy, integrating people, technology, and processes. This includes establishing a cybersecurity risk management framework that aligns with industry standards and best practices provided by the National Institute of Standards and Technology (“NIST”), employee training, the use of innovative technologies, and the implementation of policies and procedures in the areas of Information Security, Data Governance, Business Continuity and Disaster Recovery, Privacy, Third-Party Risk Management, and Incident Response that ensure compliance with applicable laws, regulations and obligations, such as the Gramm-Leach-Bliley Act (“GLBA”), the Federal Financial Institutions Examination Council (“FFIEC”) Cybersecurity Assessment Tool, and the Ransomware Self-Assessment Tool (“RSAT”). Additionally, we have implemented various technical measures to prevent, detect, and respond to cybersecurity incidents, such as firewalls, third-party managed detection & response services, encryption, authentication, backup and recovery solutions. The Company engages third-party consultants and independent auditors to, among other things, conduct penetration tests and perform cybersecurity risk assessments and audits to regularly evaluate our cybersecurity posture in conjunction with obtaining cybersecurity insurance coverage to mitigate the potential financial impact of cybersecurity incidents.

The Board Enterprise Risk Management (“ERM”) Committee provides governance oversight of all risks faced by the Company, including cybersecurity and information technology general controls. The Chief Information Officer (“CIO”) manages the IT Department and reports to the Board Risk Committee and Chief Risk Officer (“CRO”) on these matters. The CIO also supervises the Information Security Officer (“ISO”) who is responsible for implementing and maintaining the Company’s Information Security Program. The Information Security Program, which is governed by various information security and cybersecurity, systems development, change control, disaster recovery/business continuity and physical asset classification and control policies. Additional cybersecurity training to the ERM Committee is provided and overseen by the CRO and CIO. The Information Security Program identifies data sources, threats and vulnerabilities and ensures awareness, accountability, and oversight for data protection throughout the Company and with trusted third parties to ensure that data is protected and able to be recovered in the event of a breach or failure (technical or other disaster). The Information Security Department conducts on-going technology and IT threat meetings to ensure the latest threats are addressed in addition to external and internal penetration testing, business continuity/ disaster recovery testing, and incident response plan testing. The CIO is a member of various management committees, chairs the Company’s management-level Information Technology Steering Committee, and presents information security and cybersecurity updates on a regular basis to the Company’s ERM Working Group, which consists of members of management, including the Chairman, President and Chief Executive Officer, Chief Operating Officer, and other senior leaders in the Company. The ERM Working Group is responsible for identifying and assessing cybersecurity risks, developing and implementing risk mitigation strategies that align with the Bank’s corporate strategies, and ensuring compliance with applicable laws and regulations. The Bank’s IT Steering Committee in conjunction with the Bank’s PMO oversees the development and implementation of our cybersecurity strategy, financial planning, and capital allocation.

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The ERM Working Group provides executive management oversight, from a risk perspective, of information systems security. As referenced above, the CIO provides information security updates to the ERM Working Group at each meeting. In addition, as discussed below, the Company has implemented an Incident Response Plan to provide a structured and systematic incident response process for information security incidents that affect any of the information technology systems, network, or data of the Company. The Incident Response Plan is implemented and maintained by the CIO and ISO and is subject to annual review and approval by the ERM Working Group. Cybersecurity metrics are reported to both management level committees and the ERM Committee and ERM Working Group on a quarterly basis.

The Board of Directors recognizes the importance of the FFIEC for Safeguarding Customer Information and has incorporated those elements in its ongoing oversight of the Information Security Program.

We continually monitor and evaluate the evolving cybersecurity landscape and the potential impact of cybersecurity incidents on our business. We may incur additional costs to enhance our cybersecurity processes and controls, to comply with new or changing laws, regulations, or contractual obligations, or to respond to or recover from cybersecurity incidents. We may also experience reputational harm or loss of customer confidence or trust as a result of cybersecurity incidents. Any of these factors could have a material adverse effect on our business, financial condition, results of operations, and reputation.

Despite our efforts to enhance our cybersecurity posture, we cannot guarantee that our processes and controls will be sufficient to prevent or mitigate all cybersecurity risks and threats that we face. We may experience cybersecurity incidents that result in unauthorized access, use, disclosure, modification, or destruction of our information systems, data, or network; disruption or degradation of our operations; loss of customers or business opportunities; regulatory investigations or enforcement actions; litigation or liability; reputational damage; or increased costs.

Risk Assessment. On a periodic basis, but not less than annually, the CIO and ISO, in conjunction with Enterprise Risk Management, identifies and documents internal and external vulnerabilities that could result in unauthorized disclosure, misuse, alteration, or destruction of customer information or customer records. Based on the results of the risk assessment, the Company’s Information Security Program may be revised to protect against any anticipated threats or hazards to the security or integrity of such information. The IT Steering Committee reviews changes to the program designed to monitor, measure, and respond to vulnerabilities identified.

Response to Security Vulnerabilities. In response to identified risks, management may take certain steps to correct and respond to security vulnerabilities, which may include:

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Internal Controls, Audit, and Testing. Regular internal monitoring is integral to the Company’s risk assessment process, which includes regular testing of internal key controls, systems, and procedures. In addition, independent third-party penetration testing to test the effectiveness of security controls and preparedness measures is conducted at least annually or more often, if warranted by the risk assessment or other external factors. Management determines the scope and objectives of the penetration analysis, which may identify additional risks or require additional costs to remediate.

Service Providers. The Company relies, in part, on third-party vendor solutions to support its operations. Many of these vendors, especially in the financial services industry, have access to sensitive and proprietary information. In order to mitigate the operational, informational and other risks associated with the use of vendors, the Company maintains a Vendor Risk Management Program, which is implemented through a Vendor Risk Management Policy and includes a detailed onboarding process and periodic reviews of vendors with access to sensitive Company data. The Vendor Risk Management Policy applies to any business arrangement between the Company and another individual or entity, by contract or otherwise, in compliance with the Interagency Guidance on Vendor Relationships: Risk Management. The Vendor Risk Management Program is audited as part of the Company’s annual Internal Audit Risk Assessment.

Employees and Training. Employees are the first line of defense against cybersecurity measures. Each employee is responsible for protecting Company and client information. Employees are provided training at initial onboarding and thereafter regarding information security and cybersecurity-related policies and procedures applicable to their respective roles within the organization. In addition, employees are subjected to regular simulated phishing assessments, designed to sharpen threat detection and reporting capabilities. In addition to training, employees are supported with solutions designed to identify, prevent, detect, respond to, and recover from incidents. Notable technologies include firewalls, intrusion detection systems, security automation and response capabilities, user behavior analytics, multi-factor authentication, data backups to immutable storage and business continuity applications. Notable services include security monitoring and response, continuous vulnerability scanning, third-party monitoring, and threat intelligence.

Board Reporting. At least annually, the CIO reports to the Board, directly or through the Enterprise-Wide Risk Management Committee, the overall status of the Information Security Program and the Company’s compliance with the Interagency Guidelines for Safeguarding Customer Information. Any material findings related to the risk assessment, risk management and control decisions, service provider arrangements, results of testing, security breaches or violations are discussed as are management’s responses and any recommendations for program changes.

Program Adjustments. The CIO monitors, evaluates, and adjusts the Information Security Program considering any relevant changes in technology, the sensitivity of its customer information, internal or external threats to information, and changing business arrangements, such as mergers and acquisitions, alliances and joint ventures, outsourcing arrangements, and changes to customer information systems.

Incident Response Plan. To ensure that information security incidents can be recovered from quickly and with the least impact to the Company and its customers, the Company maintains a structured and systematic incident response plan (the “IRP”) for all information security incidents that affect any of the IT systems, network, or data of the Company, including the Company’s data held, or IT services provided by third-party vendors or other service providers. The CISO is responsible for implementing and maintaining the IRP, which includes:

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● Report up to the Executive Incident Response Committee, as needed.

ITEM 2. Properties

We conduct our business through our main office located in Needham, Massachusetts and our branch offices located in Wellesley, Westwood, Dedham, Medfield, Medford, Dover, Ashland, Millis, Natick and Boston (Mission Hill), Massachusetts. Additionally, we have two administrative offices in Needham, Massachusetts. We own four of our offices, including our main office, and our two administrative offices and we lease seven offices of our offices. At December 31, 2023 the total net book value of our land, buildings, leasehold improvements, furniture, fixtures and equipment was $35.5 million.

ITEM 3. Legal Proceedings

Legal Proceedings

Among other things, the activities of Needham Bank, including with respect to disclosures about and implementation of numerous consumer products, are subject to various laws and numerous regulations, including those related to unfair or deceptive acts or practices. If Needham Bank is found to have violated one or more consumer protection laws, it may be required to pay restitution to certain affected customers in connection with certain of these practices. In addition, as a result of the extensive regulation, supervision and examination of our business described elsewhere in this Annual Report on Form 10-K, we are also involved, from time to time, in other reviews, investigations and proceedings (both formal and informal) by governmental agencies regarding our business, certain of which may result in adverse judgments, settlements, fines, penalties, public or private censure, increased costs, required remediation, restriction on business activities or other impacts on us.

We are not involved in any pending legal proceedings as a plaintiff or defendant other than routine legal proceedings occurring in the ordinary course of business, and at December 31, 2023, we were not involved in any legal proceedings, the outcome of which would be material to our financial condition or results of operations.

ITEM 4. Mine Safety Disclosures

Not applicable.

PART II

ITEM 5. Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities

Market, Holder and Dividend Information. The Company’s common stock is listed on the NASDAQ Capital Market under the symbol “NBBK.” The approximate number of holders of record of NB Bancorp common stock as of December 31, 2023 was 3,491. Certain shares of NB Bancorp are held in “nominee” or “street” name and accordingly, the number of beneficial owners of such shares is not known or included in the foregoing number.

NB Bancorp does not currently pay cash dividends on its common stock. Dividend payments by NB Bancorp are dependent, in part, on dividends it receives from Needham Bank, because NB Bancorp has no source of income other than dividends from Needham Bank, earnings from the investment of proceeds from the sale of shares of common stock in the stock offering which closed in December 2023 retained by NB Bancorp and interest payments with respect to our

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loan to the Employee Stock Ownership Plan. See “Item 1. Business—Supervision and Regulation—Federal Banking Regulation—Capital Distributions.”

The Federal Reserve Board has issued supervisory policies providing that dividends should be paid only out of current earnings and only if our prospective rate of earnings retention is consistent with our capital needs, asset quality and overall financial condition. Federal Reserve Board guidance also provides for prior regulatory consultation with respect to capital distributions in certain circumstances such as where the holding company’s net income for the past four quarters, net of dividends previously paid over that period, is insufficient to fully fund the dividend or the holding company’s overall rate or earnings retention is inconsistent with its capital needs and overall financial condition. In addition, Needham Bank’s ability to pay dividends would be limited if it does not have the capital conservation buffer required by the capital rules, which may limit our ability to pay dividends to stockholders. No assurances can be given that any dividends will be paid or that, if paid, will not be reduced or eliminated in the future. Special cash dividends, stock dividends or returns of capital, to the extent permitted by regulations and policies of the Federal Reserve Board and the Commissioner, may be paid in addition to, or in lieu of, regular cash dividends.

Other than its Employee Stock Ownership Plan, NB Bancorp does not have any equity compensation plans that were not approved by stockholders. NB Bancorp currently has no other equity compensation plans.

Report of Offering of Securities and Use of Proceeds Therefrom. Not applicable.

Issuer Purchases of Equity Securities

The Company did not purchase any shares of its common stock during the year ended December 31, 2023. Under current Federal Reserve Board conversion regulations, the Company may not repurchase shares of its common stock during the first year following the Company’s initial public offering, except to fund shareholder-approved equity benefit plans or, with prior regulatory approval, when extraordinary circumstances exist.

ITEM 6. [Reserved]

ITEM 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations

This discussion and analysis reflects our consolidated financial statements and other relevant statistical data, and is intended to enhance your understanding of our financial condition and results of operations. The information in this section has been derived from the consolidated financial statements that appear beginning on page 72 of this Annual Report on Form 10-K. You should read the information in this section in conjunction with the business and financial information regarding NB Bancorp and Needham Bank and the consolidated financial statements provided in this Annual Report on Form 10-K for NB Bancorp and, with respect to the year ended December 31 2022, NB Financial, MHC, Needham Bank’s mutual holding company parent prior to the mutual-to-stock conversion on December 27, 2023. NB Bancorp had not engaged in any material activities prior to December 28, 2023, the date of the consummation of the mutual to stock conversion of NB Financial, MHC.

Our results of operations depend primarily on our net interest income. Net interest income is the difference between the interest income we earn on our interest-earning assets and the interest we pay on our interest-bearing liabilities. Our results of operations also are affected by our provision for credit losses, noninterest income and noninterest expense. Noninterest income currently consists primarily of customer service fees, swap contract income, and income on bank-owned life insurance. Noninterest expense currently consists primarily of expenses related to salary and employee benefits and director fees, occupancy and equipment, data processing, marketing and charitable contribution expense, professional fees, federal deposit insurance assessments and other general and administrative expenses.

Our results of operations also may be affected significantly by general and local economic and competitive conditions, changes in market interest rates, governmental policies and actions of regulatory authorities.

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Summary of Significant Accounting Policies

The discussion and analysis of the financial condition and results of operations are based on our consolidated financial statements, which are prepared in conformity with U.S. GAAP. The preparation of these consolidated financial statements requires management to make estimates and assumptions affecting the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities, and the reported amounts of income and expenses. We consider the accounting policies discussed below to be significant accounting policies. The estimates and assumptions that we use are based on historical experience and various other factors and are believed to be reasonable under the circumstances. Actual results may differ from these estimates under different assumptions or conditions, resulting in a change that could have a material impact on the carrying value of our assets and liabilities and our results of operations.

The JOBS Act contains provisions that, among other things, reduce certain reporting requirements for qualifying public companies. As an “emerging growth company” we have elected to use the extended transition period to delay adoption of new or revised accounting pronouncements applicable to public companies until such pronouncements are made applicable to private companies. Accordingly, our consolidated financial statements may not be comparable to the financial statements of public companies that comply with such new or revised accounting standards.

The following represent our significant accounting policies:

Loans Held for Investment and Allowance for Credit Losses. Loans that management has the intent and ability to hold for the foreseeable future or until loan maturity or pay-off are reported held for investment at their outstanding principal balance adjusted for any charge-offs and net of any deferred fees (including purchase accounting adjustments) and origination costs (collectively referred to as “amortized cost”). Loan origination fees and certain direct origination costs are deferred and amortized as an adjustment of the yield using the payment terms required by the loan contract.

Loans are generally placed into nonaccrual status when they are past due 90 days or more as to either principal or interest or when, in the opinion of management, the collection of principal and/or interest is in doubt. A loan remains in nonaccrual status until the loan is current as to payment of both principal and interest or past due less than 90 days and the borrower demonstrates the ability to pay and remain current. When cash payments are received, they are applied to principal first, then to accrued interest. It is the Company’s policy not to record interest income on nonaccrual loans until principal has become current. In certain instances, accruing loans that are past due 90 days or more as to principal or interest may not go on nonaccrual status if the Company determines that the loans are well-secured and are in the process of collection. In accordance with ASC 326, the Company elected to exclude accrued interest from the amortized cost basis in its determination of the allowance for credit losses (the “ACL”) for loans held for investment, and will instead reverse accrued but unpaid interest through interest income in the period in which the loan is placed on nonaccrual status.

The ACL represents management’s best estimate of credit losses over the remaining life of the loan portfolio. Loans are charged-off against the ACL when management believes the loan balance is no longer collectible. Subsequent recoveries of previously charged-off amounts (recoveries) are recorded as increases to the ACL. The provision for credit losses is an amount sufficient to bring the ACL to an estimated balance that management considers adequate to absorb lifetime expected losses in the Company’s held for investment loan portfolio. The ACL is a valuation account that is deducted from the loans’ amortized cost basis to present the net amount expected to be collected on the loans.

Management’s determination of the adequacy of the ACL under ASC 326 is based on an evaluation of the composition of the loan portfolio current economic conditions, historical loan loss experience, reasonable and supportable forecasts, and other risk factors. We use a third-party CECL model as part of our estimation of the ACL on a quarterly basis. Loans with similar risk characteristics are collectively assessed within pools (or segments). Loss estimates within the collectively assessed population are based on a combination of pooled assumptions and loan-level characteristics. We have determined that using federal call codes is an appropriate loan segmentation methodology, as it is generally based on risk characteristics of a loan’s underlying collateral. Using federal call codes also allows us to utilize and assess publicly available external information when developing our estimate of the ACL. The weighted

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average life (“WAL”) method is the primary credit loss estimation methodology we use and involves estimating future cash flows for pools of loans using their weighted average life.

In applying future economic forecasts, the Company utilizes a forecast period of up to two years. The Company considers economic forecasts of inflation, Federal Open Market Committee interest rates, national gross domestic product, and unemployment rates sourced from the Federal Reserve System’s “Beige Book,” Wells Fargo’s “U.S. Economic Outlook,” and the “Economic Forecast” publications from FHN Financial to inform the model for loss estimation. Historical loss rates used in the quantitative model are primarily derived using both the Bank’s data, supplemented with peer bank data obtained from publicly available sources (i.e., federal call reports). The Bank’s peer group is comprised of financial institutions of relatively similar size and in similar markets (i.e. $10.00 billion or less of total assets and headquartered in Massachusetts). Management also considers qualitative adjustments when estimating credit losses to take into account the model’s quantitative limitations. Qualitative adjustments to quantitative loss factors, either negative or positive, may include considerations of economic conditions, volume and severity of past due loans, value of underlying collateral, experience, depth, and ability of management, and concentrations of credit.

For those loans that do not share similar risk characteristics, we evaluate the ACL needs on an individual (or loan by loan) basis. This population of individually evaluated loans (or loan relationships with the same primary source of repayment) is determined on a quarterly basis and is based on whether the risk grade of the loan is substandard or worse and the balance exceeds $500,000 and the loan’s terms differ significantly from other pooled loans. In accordance with our policy, non-accrual residential real estate loans that are well secured (LTV <75%) are not considered to warrant a downgrade to substandard risk rating and are therefore generally excluded from individually evaluated loans. Measurement of credit loss is based on the expected future cash flows of an individually evaluated loan, discounted at the loan’s effective interest rate, or measured on an observable market value, if one exists, or the estimated market value of the collateral underlying the loan, discounted to consider estimated costs to sell the collateral for collateral-dependent loans. If the net value is less than the loan’s amortized cost, a specific reserve in the ACL is recorded, which is charged-off in the period when management believes the loan balance is no longer collectible.

Income Taxes. We use the liability method of accounting for income taxes. Under this method, deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. Deferred tax assets are reduced by a valuation allowance when it is more likely than not that some portion of the deferred tax asset will not be realized. We exercise significant judgment in evaluating the amount and timing of recognition of the resulting tax liabilities and assets. These judgments may require us to make projections of future taxable income and/or to carryback to taxable income in prior years. The judgments and estimates we make in determining our deferred tax assets, which are inherently subjective, are reviewed on a continual basis as regulatory and business factors change. Any reduction in estimated future taxable income may require us to record a valuation allowance against our deferred tax assets.

Securities Valuation and Credit Losses. We classify our investments in debt securities as either held-to-maturity or available-for-sale. Securities classified as held-to maturity are recorded at cost or amortized cost. Available-for-sale securities are carried at fair value. We obtain our fair values from one or more third-party services. This service’s fair value calculations are based on quoted market prices when such prices are available. If quoted market prices are not available, estimates of fair value are computed using a variety of techniques, including extrapolation from the quoted prices of similar instruments or recent trades for thinly traded securities, fundamental analysis, or through obtaining purchase quotes. Due to the subjective nature of the valuation process, it is possible that the actual fair values of these investments could differ from the estimated amounts, thereby affecting our financial position, results of operations and cash flows.

We adopted ASC 326 using the prospective transition approach for debt securities for which other-than-temporary impairment had been recognized prior to January 1, 2023. As of December 31, 2022, we did not have any other than-temporarily impaired investment securities. Therefore, upon adoption of ASC 326, we determined that an allowance for credit losses on available for sale securities was not deemed material. For available for sale securities, management evaluates all investments in an unrealized loss position on a quarterly basis, and more frequently when

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economic or market conditions warrant such evaluation. If we have the intent to sell the security or it is more likely than not that we will be required to sell the security, the security is written down to fair value and the entire loss is recorded in earnings through an allowance for credit losses. If either of the above criteria is not met, we evaluate whether the decline in fair value is the result of credit losses or other factors. In making the assessment, we may consider various factors including the extent to which fair value is less than amortized cost, performance on any underlying collateral, downgrades in the ratings of the security by a rating agency, the failure of the issuer to make scheduled interest or principal payments and adverse conditions specifically related to the security. If the assessment indicates that a credit loss exists, the present value of cash flows expected to be collected are compared to the amortized cost basis of the security and any excess is recorded as an allowance for credit loss, limited by the amount that the fair value is less than the amortized cost basis. Any amount of unrealized loss that has not been recorded through an allowance for credit loss is recognized in other comprehensive income. Changes in the allowance for credit loss are recorded as provision for (or reversal of) credit loss expense. Losses are charged against the allowance for credit loss when management believes an available for sale security is confirmed to be uncollectible or when either of the criteria regarding intent or requirement to sell is met. At December 31, 2023, there was no allowance for credit loss related to the available for sale portfolio. Accrued interest receivable on available for sale debt securities totaled $1.2 million at December 31, 2023 and was excluded from the estimate of credit losses.

Comparison of Financial Condition at December 31, 2023 and December 31, 2022

Total Assets. Total assets increased $941.1 million, or 26.2%, to $4.53 billion as of December 31, 2023 from $3.59 billion at December 31, 2022. The increase was primarily the result of increases in net loans and federal funds sold.

Cash and Cash Equivalents. Cash and cash equivalents increased $116.0 million, or 31.0%, to $272.6 million as of December 31, 2023 from $156.5 million at December 31, 2022. The increase in cash and cash equivalents was due to the proceeds from the Company’s mutual-to-stock conversion and related IPO, which closed on December 27, 2023.

Securities Available-for-Sale. Securities available-for-sale decreased $56.0 million, or 22.8%, to $189.5 million as of December 31, 2023 from $245.5 million at December 31, 2022. During the year ended December 31, 2023, purchases of securities were more than offset by the fair value decline in the portfolio, as well as amortization and calls. No securities were sold during the year ended December 31, 2023.

Loans, net. Loans, net increased $866.6 million, or 29.0%, to $3.86 billion at December 31, 2023 from $2.99 billion at December 31, 2022. We experienced increases in each of our loan portfolios. From December 31, 2022 to December 31, 2023, one- to four-family residential real estate loans, including home equity loans, increased $187.1 million, or 18.6%; our commercial real estate portfolio, including multi-family real estate loans, increased $372.0 million, or 36.8%; construction and land development increased $70.3 million, or 12.7%; commercial and industrial loans increased $240.5 million, or 97.2%; and consumer loans increased $8.3 million, or 5.3%. The increase in these loan portfolios reflects our strategy to grow the balance sheet by continuing to diversify into these higher-yielding loans to improve net margins and manage interest rate risk. In addition, to help manage interest rate risk and generate non-interest income, occasionally we sell one- to four-family residential mortgage loans into the secondary market on a servicing-retained basis. During the year ended December 31, 2023, we sold $2.1 million in loans and recognized gains of $29,000.

Federal Home Loan Bank Stock. The FHLB is a cooperative bank that provides services to its member financial institutions. The primary reason for our membership in the FHLB is to gain access to a reliable source of wholesale funding and as a tool to manage interest rate risk. The purchase of stock in the FHLB is a requirement for a member to gain access to funding. We purchase and/or are subject to redemption of FHLB stock proportional to the volume of funding received and view the holdings as a necessary long-term investment for the purpose of balance sheet liquidity and not for investment return. We held an investment in FHLB stock of $14.6 million and $13.2 million at December 31, 2023 and 2022, respectively. The amount of stock we are required to purchase is in proportion to our FHLB borrowings and level of total assets. Accordingly, the increase in the FHLB stock is due to increased borrowings.

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Bank-owned Life Insurance. We invest in bank-owned life insurance to help offset the costs of our employee benefit plan obligations. Bank-owned life insurance also generally provides noninterest income that is nontaxable. Bank-owned life insurance increased $1.5 million, or 3.1%, to $50.5 million as of December 31, 2023 from $49.0 million at December 31, 2022. The increase during 2023 was from increases in the cash surrender value of the policies.

Prepaid Expenses and Other Assets. Prepaid expenses and other assets consist primarily of right of use assets related to our long-term leases and derivatives with a positive fair value and other investments and decreased $4.1 million, or 7.1%, to $53.1 million as of December 31, 2023 from $57.2 million as of December 31, 2021. The decrease resulted primarily from increases in the value of our right of use assets and derivatives from hedging strategies and other investments.

Deposits. Deposits increased $500.6 million, or 17.3%, to $3.39 billion as of December 31, 2023 from $2.89 billion as of December 31, 2022. Core deposits (which we define as all deposits including certificates of deposit, other than brokered deposits) increased $567.0 million, or 21.5%, to $3.2 billion at December 31, 2023 from $2.6 billion at December 31, 2022. The increase resulted from increases in customer deposits, primarily certificates of deposit, which increased $353.8 million, or 36.9% from the prior year, along with money market and checking accounts, which increased $229.1 million and $82.9 million, respectively, from December 31, 2022.

As of December 31, 2023 and 2022, we had approximately $183.6 million and $250.0 million of brokered deposits, respectively. The decrease in brokered deposits during 2023 resulted from the growth in the core deposit portfolio.

Borrowings. We had $283.3 million of borrowings at December 31, 2023 as compared to $293.1 million at December 31, 2022. The decrease is due to funding needs and our ability to repay some advances. Our borrowings consisted solely of FHLB advances.

Accrued expenses and other liabilities. Accrued expenses and other liabilities increased $28.9 million, or 55.20%, to $81.3 million as of December 31, 2023 from $52.4 million at December 31, 2022. The increase resulted from an IPO-related payable, an increase in the allowance for unfunded commitments, and an increase in derivatives with a negative fair value.

Equity. Shareholders’ equity was $758.0 million, representing an increase of $413.9 million, or 120.3%, from the prior year. The increase resulted primarily from the capital raised during the Company’s public offering, which was consummated on December 27, 2023, and net income of $9.8 million during the year ended December 31, 2023.

Comparison of Operating Results for the Years Ended December 31, 2023 and December 31, 2022

Net Income. Net income was $9.8 million for the year ended December 31, 2023, compared to net income of $30.1 million for the year ended December 31, 2022, a decrease of $20.2 million, or 67.3%. The decrease was primarily due to a one-time donation of $2.0 million in cash and 1.7 million shares of common stock to the Needham Bank Charitable Foundation at a total market value of $19.1 million, in addition to a $7.9 million discretionary bonus awarded by the Compensation Committee, a $1.9 million pension expense and $3.7 million of additional income tax expense related to the impact of public company tax laws. In addition to the mutual-to-stock conversion expense, the Company also recognized $7.2 million in additional provision for credit losses, due to the growth of the loan portfolio and unfunded commitments. Partially offsetting these increases in expenses was a $25.1 million, or 23.9%, increase in net interest income due to net loan growth and an increase in the weighted average yield on our interest-earning assets and a $6.3 million, or 67.9%, increase in noninterest income due to increases from employee retention credit income and increases in cash management fees from customers.

Interest and Dividend Income. Interest and dividend income increased $100.0 million, or 83.0%, to $220.5 million for the year ended December 31, 2023 from $120.5 million for the year ended December 31, 2022, primarily due to a $98.2 million increase in interest and fees on loans. The increase in interest and fees on loans was primarily due to an increase of $979.5 million in the average balance of the loan portfolio to $3.46 billion for the year ended December 31, 2023 from $2.49 billion for the year ended December 31, 2022 and an increase of 154 basis points in the weighted

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average yield for the loan portfolio to 6.12% for 2023 from 4.58% for 2022, reflecting the increasing rate environment year to year as well as the growth of our loan portfolio.

Average interest-earning assets increased $807.2 million, to $3.81 billion for the year ended December 31, 2023 from $3.01 billion for the year ended December 31, 2022. The yield on interest-earning assets increased 177 basis points to 5.78% for the year ended December 31, 2023 from 4.01% for the year ended December 31, 2022.

Interest Expense.Total interest expense increased $74.9 million, or 481.7%, to $90.4 million for the year ended December 31, 2023 from $15.5 million for the year ended December 31, 2022. Interest expense on deposit accounts increased $63.7 million, or 502.0%, to $76.4 million for the year ended December 31, 2023 from $12.7 million for the year ended December 31, 2022, due to an increase in the average balance of interest-bearing deposits of $516.6 million, or 23.6%, to $2.70 billion for the year ended December 31, 2023 from $2.19 billion for the year ended December 31, 2022 and an increase in the weighted average rate on interest-bearing deposits to 3.05% for the year ended December 31, 2023 from 0.68% for the year ended December 31, 2022.

Interest expense on FHLB advances increased $11.2 million, or 391.4%, to $14.1 million for the year ended December 31, 2023 from $2.9 million for the year ended December 31, 2022. The average balance of FHLB advances increased $171.1 million, or 193.7%, to $259.5 million for the year ended December 31, 2023 from $88.3 million for the year ended December 31, 2022 and the weighted average cost of these advances increased to 5.41% for 2023 from 3.24% for 2022. The increase in the average balance was due to our strategy to utilize additional borrowings to support loan growth and for liquidity management.

Net Interest Income. Net interest income was $130.1 million for the year ended December 31, 2023, compared to $105.0 million in the prior year, representing an increase of $25.1 million, or 23.9%. The net interest margin was 3.41% for 2023, representing a decrease of eight basis points from 2022, primarily due to an increase in the cost of liabilities used to fund the Company’s loan growth. The increase in net interest income was primarily due to a $807.2 million increase in the average balance of interest-earning assets during the year ended December 31, 2023, which outpaced growth in average interest-bearing liabilities, which grew by $689.7 million during the year ended December 31, 2023. The net interest margin decreased slightly to 3.41% for the year ended December 31, 2023 from 3.49% for the year ended December 31, 2022. The decrease in the net interest margin was primarily due to the increase in the average rates paid on interest-bearing liabilities increasing by 237 basis points during the year ended December 31, 2023, while the yield on interest-earning assets grew by 177 basis points.

Provision for Credit Losses. Based on management’s analysis of the adequacy of allowance for credit losses, a provision of $13.9 million was recorded for the year ended December 31, 2023 in accordance with the CECL standard, compared to a provision of $6.7 million for the year ended December 31, 2022 in accordance with the incurred loss methodology standard. The $7.2 million, or 107.2%, increase in the provision was primarily due to the material growth in total loans which increased $878.3 million, or 29.1%, to $3.89 billion at December 31, 2023 from $3.02 billion at December 31, 2022. The provision for credit losses for the year ended December 31, 2023 consisted of a provision for credit losses of $9.7 million and a provision for unfunded commitments of $4.2 million.

Noninterest Income. Noninterest income increased $6.3 million, or 68.0%, to $15.6 million for the year ended December 31, 2023 from $9.3 million for the year ended December 31, 2022. The increase resulted primarily from a $3.5 million employee retention credit received in 2023 resulting from COVID-19 impacts, and a $2.7 million increase in customer service fees, primarily from increased money service fees related to the cannabis banking services. The table below sets forth our noninterest income for the years ended December 31, 2023 and 2022:

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Year ended

December 31, Change

(Dollars in thousands) 2023 2022 Amount Percent

Increase in cash surrender value of BOLI 1,510 1,157 353 30.51%

Mortgage banking income 581 595 (14) (2.35%)

Employee retention credit income 3,452 — 3,452 100.00%

Noninterest Expense. Noninterest expense for 2023 was $119.9 million, representing an increase of $48.8 million, or 68.5%, from the prior year, and included certain one-time costs associated with the Company’s mutual-to-stock conversion during the year ended December 31, 2023. Excluding expenses related to the mutual-to-stock conversion and certain other non-operating items, noninterest expense on an operating basis for 2023 was $91.0 million, which represents a $19.8 million, or 27.9%, increase from 2022 as the Company continued to invest in infrastructure to support growth. Noninterest expense increased $48.8 million, or 68.5%, to $119.9 million for the year ended December 31, 2023 from $71.2 million for the year ended December 31, 2022. Salary and employee benefit expenses increased $20.9 million, or 44.0%. The increase in salary and employee benefits resulted primarily from the hiring of additional employees consistent with our business strategy to grow the Company, as well as discretionary bonuses awarded by the Compensation Committee. Charitable contribution expense increased $19.3 million resulting from a $19.1 million charitable contribution as part of the Company’s mutual-to-stock conversion and related IPO. Additionally, director and professional fees increased $1.5 million, or 31.0%, resulting primarily from increased professional services in connection with our loan operations, and FDIC insurance expense increased $2.9 million, or 157.4%, resulting from an increase in asset growth and a reduction in capital ratios. The table below sets forth our noninterest expense for the years ended December 31, 2023 and 2022:

Year ended

December 31, Change

(Dollars in thousands) 2023 2022 Amount Percent

Income Tax Expense. Income tax expense decreased $4.3 million, or 68.1%, to $2.0 million for the year ended December 31, 2023 from $6.3 million for the year ended December 31, 2022. The effective tax rate was 17.1% and 17.4% for the years ended December 31, 2023 and 2022, respectively. The effective tax rate decreased during 2023 primarily as a result of a decrease in income before taxes of $24.5 million, or 67.45% in comparison to 2022.

Average Balances and Yields. The following tables set forth average balance sheets, average yields and costs, and certain other information for the periods indicated. No tax-equivalent yield adjustments have been made, as the effects would be immaterial. Non-accrual loans were included in the computation of average balances. All average balances are daily average balances. The yields set forth below include the effect of deferred fees, discounts, and premiums that are amortized or accreted to interest income or interest expense; such fees, discounts and premiums were not material for the periods presented.

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For the Year Ended December 31,

Average Average

Outstanding Average Outstanding Average

Interest-earning assets:

Allowance for credit losses (30,041) (20,422)

Interest-bearing liabilities:

Other non-interest-bearing liabilities 78,149 48,210

Total liabilities and shareholders' equity $ 3,974,214 $ 3,118,889

Net interest rate spread (1) 2.73 % 3.33 %

Net interest-earning assets (2) $ 850,615 $ 731,115

Net interest margin (3) 3.41 % 3.49 %

Rate/Volume Analysis. The following table presents the effects of changing rates and volumes on our net interest income for the periods indicated. The rate column shows the effects attributable to changes in rate (changes in rate multiplied by prior volume). The volume column shows the effects attributable to changes in volume (changes in volume multiplied by prior rate). The total column represents the sum of the prior columns. For purposes of this table, changes attributable to both rate and volume, which cannot be segregated, have been allocated proportionately based on the changes due to rate and the changes due to volume. There were no out-of-period items or adjustments required to be excluded from the table below.

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Year Ended

Increase (Decrease) Due to Total

Increase

(Dollars in thousands) Volume Rate (Decrease)

Interest-earning assets:

Interest-bearing liabilities:

Savings accounts (12) — (12)

Management of Market Risk

General. Our most significant form of market risk is interest rate risk because, as a financial institution, the majority of our assets and liabilities are sensitive to changes in interest rates. Therefore, a principal part of our operations is to manage interest rate risk and limit the exposure of our financial condition and results of operations to changes in market interest rates. Our ERM Committee is responsible for evaluating the interest rate risk inherent in our assets and liabilities, for determining the level of risk that is appropriate, given our business strategy, operating environment, capital, liquidity and performance objectives, and for managing this risk consistent with the policy and guidelines approved by our board of directors. The ERM Committee meets at least quarterly, is comprised of directors, executive officers and certain senior management, and reports to the full board of directors on at least a quarterly basis. We currently utilize a third-party modeling program, prepared on a quarterly basis, to evaluate our sensitivity to changing interest rates, given our business strategy, operating environment, capital, liquidity and performance objectives, and for managing this risk consistent with the guidelines approved by the board of directors.

We have sought to manage our interest rate risk in order to minimize the exposure of our earnings and capital to changes in interest rates. We have implemented the following strategies to manage our interest rate risk:

● maintaining a prudent level of liquidity;

● maintaining a prudent level of off-balance sheet funding capacity

● growing our volume of core deposit accounts;

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Shortening the average term of our interest-earning assets by increasing our investments in shorter-term assets, as well as originating loans with variable interest rates, helps to match the maturities and interest rates of our assets and liabilities better, thereby reducing the exposure of our net interest income to changes in market interest rates.

Net Interest Income. We analyze our sensitivity to changes in interest rates through a net interest income model. Net interest income is the difference between the interest income we earn on our interest-earning assets, such as loans and securities, and the interest we pay on our interest-bearing liabilities, such as deposits and borrowings. We estimate what our net interest income would be for a 12-month period. We then calculate what the net interest income would be for the same period under the assumptions that the United States Treasury yield curve increases or decreases instantaneously by various basis point increments, with changes in interest rates representing immediate and permanent, parallel shifts in the yield curve. A basis point equals one-hundredth of one percent, and 100 basis points equals one percent. An increase in interest rates from 3% to 4% would mean, for example, a 100-basis point increase in the “Change in Interest Rates” column below.

The following table sets forth, as of December 31, 2023, the calculation of the estimated changes in our net interest income that would result from the designated immediate changes in the United States Treasury yield curve.

Change in Interest Rates Net Interest Income Year Year 1 Change from

(basis points) (1) 1 Forecast Level

(Dollars in thousands)

(1) Assumes an immediate uniform change in interest rates at all maturities.

The table above indicates that at December 31, 2023, we would have experienced a 0.3% decrease in net interest income in the event of an instantaneous parallel 200 basis point increase in market interest rates and a 3.1% decrease in net interest income in the event of an instantaneous 200 basis point decrease in market interest rates.

Economic Value of Equity. We also compute amounts by which the net present value of our assets and liabilities (economic value of equity or “EVE”) would change in the event of a range of assumed changes in market interest rates. This model uses a discounted cash flow analysis and an option-based pricing approach to measure the interest rate sensitivity of net portfolio value. The model estimates the economic value of each type of asset, liability and off-balance sheet contract under the assumptions that the United States Treasury yield curve increases instantaneously by 100, 200, and 300 basis point increments or decreases instantaneously by 100 or 200 basis point increments, with changes in interest rates representing immediate and permanent, parallel shifts in the yield curve.

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The following table sets forth, as of December 31, 2023, the calculation of the estimated changes in our EVE that would result from the designated immediate changes in the United States Treasury yield curve.

Estimated Increase

At December 31, 2023 Estimated (Decrease) in EVE

Change in Interest Rates (basis points) (1) EVE (2) Amount Percent

(Dollars in thousands)

(1) Assumes an immediate uniform change in interest rates at all maturities.

The table above indicates that at December 31, 2023, we would have experienced a 1.5% decrease in EVE in the event of an instantaneous parallel 200 basis point increase in market interest rates and a 2.9% decrease in EVE in the event of an instantaneous 200 basis point decrease in market interest rates.

Certain shortcomings are inherent in the methodologies used in the above interest rate risk measurements. Modeling changes require making certain assumptions that may or may not reflect the manner in which actual yields and costs respond to changes in market interest rates. The net interest income and net economic value tables presented assume that the composition of our interest-sensitive assets and liabilities existing at the beginning of a period remains constant over the period being measured and assumes that a particular change in interest rates is reflected uniformly across the yield curve regardless of the duration or repricing of specific assets and liabilities. Accordingly, although the tables provide an indication of our interest rate risk exposure at a particular point in time, such measurements are not intended to and do not provide a precise forecast of the effect of changes in market interest rates, and actual results may differ.

Interest rate risk calculations also may not reflect the fair values of financial instruments. For example, decreases in market interest rates can increase the fair values of our loans, mortgage servicing rights, deposits and borrowings.

Liquidity and Capital Resources

Liquidity describes our ability to meet the financial obligations that arise in the ordinary course of business. Liquidity is primarily needed to meet the borrowing and deposit withdrawal requirements of our customers and to fund current and planned expenditures. Our primary sources of funds are deposits, principal and interest payments on loans and securities, and proceeds from maturities of securities. We are also able to borrow from the FHLB. At December 31, 2023, we had outstanding advances of $283.3 million from the FHLB. At December 31, 2023, we had unused borrowing capacity of $608.6 million with the FHLB. At December 31, 2023 we also had a $46.2 million available line of credit with the Discount Window at the Federal Reserve Bank of Boston. Additionally, at December 31, 2023, we had $183.6 million of brokered deposits and pursuant to our internal liquidity policy, which allows us to utilize brokered deposits up to 10.0% of our total assets, we had an additional capacity of up to approximately $269.7 million of brokered deposits.

While maturities and scheduled amortization of loans and securities are predictable sources of funds, deposit flows and loan prepayments are greatly influenced by general interest rates, economic conditions, and competition. Our most liquid assets are cash and short-term investments. The levels of these assets are dependent on our operating, financing, lending, and investing activities during any given period.

Our cash flows are comprised of three primary classifications: cash flows from operating activities, investing activities, and financing activities. For additional information, see the consolidated statements of cash flows for the years

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ended December 31, 2023 and 2022 included as part of the consolidated financial statements appearing elsewhere in this Annual Report on Form 10-K.

We are committed to maintaining a strong liquidity position. We monitor our liquidity position on a daily basis. We anticipate that we will have sufficient funds to meet our current funding commitments. Based on our deposit retention experience and current pricing strategy, we anticipate that a significant portion of maturing time deposits will be retained.

At December 31, 2023, Needham Bank exceeded all of its regulatory capital requirements, and was categorized as well-capitalized at that date. Management is not aware of any conditions or events since the most recent notification of well-capitalized status that would change our category. See Note 11 of the notes to consolidated financial statements on page 105.

Off-Balance Sheet Arrangements and Aggregate Contractual Obligations

Commitments. As a financial services provider, we routinely are a party to various financial instruments with off-balance-sheet risks, such as commitments to extend credit and unused lines of credit. While these contractual obligations represent our future cash requirements, a significant portion of commitments to extend credit may expire without being drawn upon. Such commitments are subject to the same credit policies and approval process accorded to loans we make. At December 31, 2023, the unfunded portion of construction loans, home equity lines of credit, commercial lines of credit and other lines of credit, along with letters of credit, totaled $1.1 billion. Our allowance for credit losses on these unfunded commitments amounted to $6.0 million. We anticipate that we will have sufficient funds available to meet our current lending commitments. Time deposits that are scheduled to mature in less than one year from December 31, 2023 totaled $340.8 million. Management expects that a substantial portion of these time deposits will be retained. However, if a substantial portion of these time deposits is not retained, we may utilize advances from the FHLB, brokered deposits or raise interest rates on deposits to attract new accounts, which may result in higher levels of interest expense.

Contractual Obligations. In the ordinary course of our operations, we enter into certain contractual obligations. Such obligations include data processing services, operating leases for premises and equipment, agreements with respect to borrowed funds and deposit liabilities.

Recent Accounting Pronouncements

See Note 23 to the notes to the consolidated financial statements for a description of recent accounting pronouncements that may affect our financial condition and results of operations.

Impact of Inflation and Changing Prices

The consolidated financial statements and related data presented in this Annual Report on Form 10-K have been prepared in accordance with U.S. GAAP, which requires the measurement of financial position and operating results in terms of historical dollars without considering changes in the relative purchasing power of money over time due to inflation. The primary impact of inflation on our operations is reflected in increased operating costs. Unlike most industrial companies, virtually all of the assets and liabilities of a financial institution are monetary in nature. As a result, interest rates, generally, have a more significant impact on a financial institution’s performance than does inflation. Interest rates do not necessarily move in the same direction or to the same extent as the prices of goods and services.

ITEM 7A. Quantitative and Qualitative Disclosures about Market Risk

The information called for by this Item is incorporated by reference to the discussion of market risk in Item 7 - “Management’s Discussion and Analysis of Financial Condition and Results of Operations - Management of Interest Rate Risk.”

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ITEM 8. Financial Statements and Supplementary Data

(a)(1) Financial Statements

The documents files as a part of this 10-K are:

(A) Report of Independence Registered Public Accounting Firm [PCAOB ID 149]

(B) Consolidated Balance Sheets as of December 31, 2023 and 2022

(G) Notes to Consolidated Financial Statements

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Report of Independent Registered Public Accounting Firm

To the Shareholders and the Board of Directors of NB Bancorp, Inc.

Opinion on the Financial Statements

We have audited the accompanying consolidated balance sheets of NB Bancorp, Inc. (the “Company”) as of December 31, 2023 and 2022, the related consolidated statements of income, comprehensive income, changes in shareholders’ equity and cash flows for the years then ended, and the related notes to the consolidated financial statements (collectively, the “financial statements”). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 2023 and 2022, and the results of its operations and its cash flows for the years then ended, in conformity with accounting principles generally accepted in the United States of America.

Change in Accounting Principle

As discussed in Note 1 to the financial statements, the Company has elected to change its method of accounting for credit losses effective January 1, 2023 due to the adoption of Financial Accounting Standards Board Accounting Standards Codification No. 326, Financial Instruments – Credit Losses (ASC 326). The Company adopted the new credit loss standard using the modified retrospective method such that prior period amounts are not adjusted and continue to be reported in accordance with previously applicable generally accepted accounting principles.

Basis for Opinion

These financial statements are the responsibility of the Company’s management. Our responsibility is to express an opinion on the Company’s financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to the Company in accordance with U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. The Company is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part of our audits we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of the Company’s internal control over financial reporting. Accordingly, we express no such opinion.

Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.

/s/ Elliott Davis, LLC

We have served as the Company's auditor since 2023.

Columbia, South Carolina

March 28, 2024

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NB Bancorp, Inc.

Consolidated Balance Sheets

December 31, 2023 and 2022

(Dollars in thousands)

Assets

Available-for-sale securities, at fair value 189,465 245,480

Allowance for credit losses (32,222) (25,028)

Banking premises and equipment, net 35,531 35,344

Depositors Insurance Fund stock 139 139

Federal Reserve Bank stock 10,323 8,104

Bank owned life insurance ("BOLI") 50,516 49,006

Prepaid expenses and other assets 53,109 57,167

Income tax refunds receivable — 4,134

Liabilities and shareholders' equity

Mortgagors' escrow accounts 4,229 4,064

Accrued expenses and other liabilities 81,325 52,399

Accrued retirement liabilities 19,213 11,982

Commitments and contingencies (Notes 2, 6, 8 & 12)

Shareholders' equity

Additional paid in capital 417,030 —

Accumulated other comprehensive loss (11,897) (14,401)

The accompanying notes are an integral part of these consolidated financial statements.

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NB Bancorp, Inc.

Consolidated Statements of Income

For the Years Ended December 31, 2023 and 2022

(Dollars in thousands, except per share amounts)

For the Year Ended

December 31

INTEREST AND DIVIDEND INCOME

Interest on investments securities 4,773 4,954

Interest on cash equivalents and other 3,755 1,798

INTEREST EXPENSE

NBBK US Equity

NBBK · 10-K · period ended 2023-12-31

ITEM 1A. Risk Factors

ITEM 1B. Unresolved Staff Comments

ITEM 1C. Cybersecurity

ITEM 2. Properties

ITEM 3. Legal Proceedings

ITEM 4. Mine Safety Disclosures

ITEM 5. Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities

ITEM 6. [Reserved]

ITEM 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations

ITEM 7A. Quantitative and Qualitative Disclosures about Market Risk

ITEM 8. Financial Statements and Supplementary Data

NBBK US Equity☆

NBBK · 10-K · period ended 2023-12-31

ITEM 1A. Risk Factors

ITEM 1B. Unresolved Staff Comments

ITEM 1C. Cybersecurity

ITEM 2. Properties

ITEM 3. Legal Proceedings

ITEM 4. Mine Safety Disclosures

ITEM 5. Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities

ITEM 6. [Reserved]

ITEM 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations

ITEM 7A. Quantitative and Qualitative Disclosures about Market Risk

ITEM 8. Financial Statements and Supplementary Data

NBBK US Equity