First Bancorp, Inc /ME/

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Consolidated Statements of Income and Comprehensive Income

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Consolidated Statements of Changes in Shareholders' Equity

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Notes to Consolidated Financial Statements

Nature of Operations

The Company, through its wholly-owned subsidiary, the Bank, provides a full range of banking services to individual and corporate customers from 18 offices in coastal and eastern Maine. First National Wealth Management, a division of the Bank, provides investment management, private banking and financial planning services. On January 28, 2016, the Board of Directors voted to change the Bank's name to First National Bank from The First, N.A.

Note 1. Summary of Significant Accounting Policies

Principles of Consolidation

The consolidated financial statements include the accounts of the Company and the Bank. All intercompany accounts and transactions have been eliminated in consolidation.

Subsequent Events

Events occurring subsequent to December 31, 2025 have been evaluated as to their potential impact on the financial statements.

Use of Estimates in Preparation of Financial Statements

In preparing the financial statements in accordance with GAAP, Management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities as of the date of the balance sheet and revenues and expenses for the reporting period. Actual results could differ significantly from those estimates. Material estimates that are particularly susceptible to significant change in the near-term relate to the determination of the allowance for credit losses, the valuations of mortgage servicing rights, derivative financial instruments, debt securities in an unrealized loss position, and goodwill.

Investment Securities

Investment securities are classified as AFS or HTM when purchased. There are no trading account securities. AFS securities consist primarily of debt securities which Management intends to hold for indefinite periods of time. They may be used as part of the Bank's funds management strategy, and may be sold in response to changes in interest rates or prepayment risk, changes in liquidity needs, or for other reasons. They are accounted for at fair value, with unrealized gains or losses adjusted through shareholders' equity, net of related income taxes. The cost basis is adjusted for the amortization of premiums and accretion of discounts, computed using the effective interest method over the securities' contractual lives. HTM securities consist primarily of debt securities which Management has acquired solely for long-term investment purposes, rather than for purposes of trading or future sale. For HTM Securities, Management has the intent and the Bank has the ability to hold such securities until their respective maturity dates. Such securities are carried at cost adjusted for the amortization of premiums and accretion of discounts, computed using the effective interest method over the securities' contractual lives. Effective January 1, 2022 securities purchases are accounted for on a trade date basis; prior to January 1, 2022 a settlement date basis was used. Reported amounts would not be materially different if basis had not changed. Gains and losses on the sales of investment securities are determined using the amortized cost of the specifically identified security.

Fair Value of Securities. Determining a market price for securities carried at fair value is a critical accounting estimate in the Company's financial statements. Pricing of individual securities is subject to a number of factors including changes in market interest rates, changes in prepayment speeds and assumptions, changes in market tolerance for risk, and any changes in the risk profile of the security. The Company subscribes to a widely recognized, independent pricing service and updates carrying values no less frequently than monthly. It also validates the values provided by the pricing service no less frequently than quarterly by measuring against security prices provided by a secondary source. Results of the validation are reported to the Bank's ALCO each quarter and any variances between the two sources above defined thresholds are investigated by management.

Credit Loss Recognition on Securities. Another significant estimate related to investment securities is the evaluation of potential credit losses on investment securities. The evaluation of securities for potential credit losses is a quantitative and qualitative process, which is subject to risks and uncertainties and is intended to determine whether declines in the fair value of investments should be recognized as a charge to the ACL. The risks and uncertainties include changes in general economic conditions, the issuer's financial condition and/or future prospects, the effects of changes in interest rates or credit spreads and the expected recovery period of unrealized losses. Securities that are in an unrealized loss position are reviewed at least quarterly to determine if recognition of a loss is required. The primary factors considered in this evaluation are (a) the length of time and extent to which the fair value has been less than cost or amortized cost and the expected recovery period of the security, (b) the financial condition, credit rating and future prospects of the issuer, (c) whether the debtor is current on contractually obligated interest and principal payments, (d) the volatility of the securities' market price, (e) the intent and ability of the Company to retain the investment for a period of time sufficient to allow for recovery, which may be at maturity, and (f) any other information and observable data considered relevant, including the expectation of receipt of all principal and interest when due.

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Derivative Financial Instruments Designated as Hedges

The Company recognizes all derivatives in the consolidated balance sheets at fair value. On the date a derivative contract is entered into, the derivative is designated as a hedge of either a forecasted transaction or the variability of cash flows to be received or paid related to a recognized asset or liability (“cash flow hedge”), a hedge of the fair value of a recognized asset or liability or of an unrecognized firm commitment (“fair value hedge”), or a held for trading instrument (“trading instrument”). The relationships between hedging instruments and hedged items is formally documented, as is the risk management objectives and strategy for undertaking various hedge transactions. Both at the hedge’s inception and on an ongoing basis, determination is made as to whether the derivatives that are used in hedging transactions are effective in offsetting changes in cash flows or fair values of hedged items. Changes in fair value of a derivative that is effective and that qualifies as a cash flow hedge are recorded in OCI and are reclassified into earnings when the forecasted transaction or related cash flows affect earnings. Changes in fair value of a derivative that qualifies as a fair value hedge and the change in fair value of the hedged item are both recorded in earnings and offset each other when the transaction is effective. Those derivatives that are classified as trading instruments, including customer loan swaps, are recorded at fair value with changes in fair value recorded in earnings. Hedge accounting is discontinued when it is determined that the derivative is no longer effective in offsetting changes in the cash flows of the hedged item, that it is unlikely that the forecasted transaction will occur, or that the designation of the derivative as a hedging instrument is no longer appropriate.

Loans Held for Sale

Loans held for sale consist of residential real estate mortgage loans and are carried at the lower of aggregate cost or fair value, as determined by current investor yield requirements.

Loans

Loans are generally reported at their outstanding principal balances, adjusted for chargeoffs, the ACL and any deferred fees or costs to originate loans. Loan commitments are recorded when funded.

Loan Fees and Costs

Loan origination fees and certain direct loan origination costs are deferred and recognized in interest income as an adjustment to the loan yield over the life of the related loans. The unamortized net deferred fees and costs are included on the balance sheets with the related loan balances, and the amortization is included with the related interest income.

Allowance for Credit Losses

Management believes the ACL requires the most significant estimates and assumptions used in the preparation of the consolidated financial statements. The ACL is based on Management's evaluation of the level of the allowance required in relation to the estimated loss exposure in the loan and investment portfolios. The allowance is comprised of the ACL on loans, the ACL on unfunded commitments, and the ACL on HTM securities. Management regularly evaluates the allowance, typically monthly, to determine the appropriate level by taking into consideration factors such as the size and growth trajectory of the portfolios, quality trends as measured by key indicators, prior loan loss experience in each loan portfolio segment, local and national business and economic conditions, and other factors contributing to Management's estimation of potential losses. The use of different estimates or assumptions could produce different provisions for credit losses.

Loan Modifications

ASU 2022-02, Troubled Debt Restructurings and Vintage Disclosures, amended ASC 326 for entities that have adopted ASU 2016-13, the CECL standard, such as the Company. ASU 2022-02 eliminated the accounting guidance for TDRs and introduced new guidance for enhanced reporting of certain loan modifications to borrowers experiencing financial difficulty. Loan modifications may include interest rate reduction, term extension, payment deferral, principle forgiveness or a combination thereof. It is the intent of such modifications to minimize future losses while providing borrowers with financial relief. Prior to adoption of ASU 2022-02, the Company evaluated loan modifications and other transactions to determine if classification as a TDR was necessary. A TDR constituted a restructuring of debt if the Company, for economic or legal reasons related to the borrower's financial difficulties, granted a concession to the borrower that it would not have otherwise considered.

Accrual of Interest Income and Expense

Interest on loans and investment securities is taken into income using methods which relate the income earned to the balances of loans and investment securities outstanding. Interest expense on liabilities is derived by applying applicable interest rates to principal amounts outstanding. For all classes of loans, recording of interest income on problem loans, which includes individually analyzed loans, ceases when collectibility of principal and interest within a reasonable period of time becomes doubtful. Cash payments received on non-accrual loans, which includes some individually analyzed loans, are applied to reduce the loan's principal balance until the remaining principal balance is deemed collectible, after which interest is recognized when collected. As a general rule, a loan may be restored to accrual status when payments are current for a substantial period of time, generally six months, and

The First Bancorp - 2025 Form 10-K - Page 56 repayment of the remaining contractual amounts is expected or when it otherwise becomes well secured and in the process of collection.

Premises and Equipment

Premises, furniture and equipment are stated at cost, less accumulated depreciation. Depreciation expense is computed by straight-line methods over the asset's estimated useful life.

Real estate acquired by foreclosure or deed in lieu of foreclosure is transferred to OREO and recorded at fair value, less estimated costs to sell, based on appraised value at the date actually or constructively received. Loan losses arising from the acquisition of such property are charged against the ACL. Subsequent provisions to reduce the carrying value of a property are recorded to the allowance for OREO losses and a charge to operations on a property specific basis.

Goodwill and Identified Intangible Assets

Intangible assets include the excess of the purchase price over the fair value of net assets acquired (goodwill) from the acquisitions of FNB Bankshares in 2005, a bank branch in Rockland, Maine and bank building in Bangor, Maine in 2012, and a bank branch in Belfast, Maine in 2020, as well as the core deposit intangible related to the respective acquisitions. The Company annually evaluates goodwill, and periodically evaluates other intangible assets, for impairment. At December 31, 2025, the Company determined goodwill and other intangible assets werenot impaired.

Income Taxes

Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between financial statement carrying amounts of assets and liabilities and their respective tax bases, and for tax credits that are available to offset future taxable income. 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. The effect of a change in tax rates on deferred tax assets and liabilities is recognized in income in the period the change is enacted.

Mortgage Servicing Rights

The valuation of mortgage servicing rights is a critical accounting policy which requires significant estimates and assumptions. The Bank often sells mortgage loans it originates and retains the ongoing servicing of such loans, receiving a fee for these services, generally 0.25% of the outstanding balance of the loan per annum. Mortgage servicing rights are recognized at fair value when they are acquired through the sale of loans, and are reported in other assets. They are amortized into non-interest income in proportion to, and over the period of, the estimated future net servicing income of the underlying financial assets. The rights are subsequently carried at the lower of amortized cost or fair value. Management uses an independent firm which specializes in the valuation of mortgage servicing rights to determine the fair value which is recorded on the balance sheet. The most important assumption is the anticipated loan prepayment rate, and increases in prepayment speed results in lower valuations of mortgage servicing rights. The valuation also includes an evaluation for impairment based upon the fair value of the rights, which can vary depending upon current interest rates and prepayment expectations, as compared to amortized cost. Impairment is determined by stratifying rights by predominant characteristics, such as interest rates and terms. The use of different assumptions could produce a different valuation. All of the assumptions are based on standards the Company believes would be utilized by market participants in valuing mortgage servicing rights and are consistently derived and/or benchmarked against independent public sources.

Post-Retirement Benefits

The cost of providing post-retirement benefits is accrued during the active service period of the employee or director.

Earnings Per Share

Basic EPS data are based on the weighted average number of common shares outstanding during each year. Diluted EPS gives effect to restricted stock granted and stock options and warrants outstanding, if any, determined by the treasury stock method.

Comprehensive Income (Loss)

Comprehensive income (loss) includes net income and OCI, which is comprised of the change in unrealized gains and losses on securities AFS net of tax, change in unrealized gains and losses on securities transferred from AFS to HTM net of amortization, change in unrealized gains and losses on cash flow hedging derivative instruments, net of tax, and unrecognized gains and losses related to post-retirement benefit costs, net of tax.

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Segments

The Company's reportable segment is determined by the Chief Financial Officer, who is the designated chief operating decision maker, based upon information provided about the Company's products and services offered, primarily banking operations. The segment is also distinguished by the level of information provided by the chief operating decision maker, who uses such information to review performance of various components of the business, which are then aggregated if operating performance, products/services, and customers are similar. The chief operating decision maker will evaluate the financial performance of the Company's business components such as by evaluating revenue streams, significant expenses, and budget to actual results in assessing the Company's segment and in the determination of allocating resources. The chief operating decision maker uses revenue streams to evaluate product pricing and significant expenses to assess performance and evaluate return on assets. The chief operating decision maker uses consolidated net income to benchmark the Company against its competitors. The benchmarking analysis coupled with monitoring of budget to actual results are used in assessing performance and in establishing compensation. Loans, investments, and deposit product service fees provide the revenues in the banking operation. Interest expense, credit loss expense, and salaries and employee benefits, as reported on the consolidated statements of income, provide the significant expenses in the banking operation. All operations are domestic. Accounting policies for segments are the same as those described herein. Segment performance is evaluated using consolidated net income. The measure of segment assets is reported on the consolidated balance sheets as total consolidated assets. Noncash items, such as depreciation and amortization, as well as expenditures for premises and equipment, are reported on the consolidated statements of cash flows.

Risks & Uncertainties

The economy in the United States and globally has experienced volatility in recent years and may continue to experience some level of volatility for the foreseeable future. Unfavorable or uncertain economic conditions can be caused by declines in economic growth, business activity, or investor or business confidence; limitations on the availability of or increases in the cost of credit and capital; increases in inflation or changes in interest rates; uncertainties regarding fiscal and monetary policies; the timing and impact of changing governmental policies, including changes in guidance and interpretation by regulatory authorities; changes in trade policies by the United States or other countries, such as tariffs or retaliatory tariffs; supply chain disruptions; consumer spending; employment levels; labor shortages; challenging labor market conditions; wage stagnation; energy prices; home prices; commercial property values; bankruptcies or a default by a significant market participant or class of counterparties; fluctuations in equity, commodity, and futures prices; the implied volatility of interest rates and credit spreads; natural disasters; climate change; epidemics; pandemics; terrorist attacks; acts of war; or a combination of these or other factors. Any or all of the foregoing could ultimately have negative downstream effects on the Company's operating results, the extent of which is indeterminable at this time.

Note 2. Cash and Cash Equivalents

For the purposes of reporting consolidated cash flows, cash and cash equivalents include cash on hand, amounts due from banks and federal funds sold. The Company maintains a portion of its cash in bank deposit accounts which, at times, may exceed federally insured limits. The Company has not experienced any losses in such accounts. The Company believes it is not exposed to any significant risk with respect to these accounts.

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Note 3. Investment Securities

The following table summarizes the amortized cost and estimated fair value of investment securities at December 31, 2025:

The following table summarizes the amortized cost and estimated fair value of investment securities at December 31, 2024:

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Allowance for Credit Losses: AFS securities, as shown in the above tables, consist of securities issued by U.S. Government Agencies, U.S. Government Sponsored Entities, State or Local Municipal Governments, or are backed by collateral that is guaranteed by the U.S. Government. We monitor the credit quality of these investments through credit ratings issued by major rating providers and through substantial price changes not consistent with general market movements. Each of the AFS securities is deemed to be investment grade, andno ACL has been established for AFS securities.

Similarly, the agency and mortgage-backed securities in the HTM portfolio were determined to all be investment grade withno ACL required, at December 31, 2025 or 2024. Municipal securities within HTM includetwo private activity bonds issued by well-known customers of the Bank with total balances of $18,357,000 as of December 31, 2025. Corporate securities in HTM consist of 11 individual companies in the banking industry. Management reviewed the collectability of these securities taking into consideration such factors as the financial condition of the issuers, reported regulatory capital ratios of the issuers, and other performance factors. It was concluded that aggregate credit risk of the corporate securities was very low and a small ACL has been carried. As of December 31, 2025 and 2024, the total ACL for HTM securities was $146,000 and $196,000, respectively.

Changes in the ACL are recorded as credit loss expense or reduction. Losses would be charged against the allowance when management believes collection of the full contractual amount due on a security is unlikely.

Contractual Maturities: The following table summarizes the contractual maturities of investment securities at December 31, 2025:

The following table summarizes the contractual maturities of investment securities at December 31, 2024:

Pledged Securities: At December 31, 2025, securities with a carrying value of $385,197,000 were pledged to secure credit lines from the FRBB and FHLBB, public deposits, repurchase agreements, and for other purposes as required by law. This compares to securities with a fair value of $349,833,000 as of December 31, 2024 pledged for the same purposes.

Realized Gains and Losses: Gains and losses on the sale of securities AFS are computed by subtracting the amortized cost at the time of sale from the security's selling price, net of accrued interest to be received. There wereno sales of securities for the years ended December 31, 2025, 2024 and 2023.

Unrealized Gains and Losses on AFS Securities: As of December 31, 2025, there were 225 AFS securities with unrealized losses held in the Company's portfolio. The Company has the ability and intent to hold its securities which are in an unrealized loss position until a recovery of their amortized cost, which may be at maturity.

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The following table summarizes AFS debt securities in an unrealized loss position for which an ACL has not been recorded at December 31, 2025, aggregated by major security type and length of time in a continuous unrealized loss position:

As of December 31, 2024, there were 243 AFS securities with unrealized losses held in the Company's portfolio. The Company has the ability and intent to hold its securities which are in an unrealized loss position until a recovery of their amortized cost, which may be at maturity.

The following table summarizes AFS debt securities in an unrealized loss position for which an ACL has not been recorded at December 31, 2024, aggregated by major security type and length of time in a continuous unrealized loss position:

Credit Quality Indicators: Agency-backed and government-sponsored enterprise securities have a long history with no credit losses, including during times of severe stress. The principal and interest payments on agency-backed debt is guaranteed by the U.S. Government. Government-sponsored enterprises similarly guarantee principal and interest payments and carry an implicit guarantee from the U.S. Department of the Treasury. Additionally, government-sponsored enterprise securities are exceptionally liquid, readily marketable, and provide a substantial amount of price transparency and price parity, indicating a perception of zero credit losses. HTM municipal debt holdings are comprised primarily of high credit quality (rated A- or higher) state and municipal obligations. High credit quality state and municipal obligations have a history of zero to near-zero credit loss. All of the mortgage-backed securities owned were issued either by GMNA, FNMA or FHLMC. HTM municipal debt holdings also includetwo unrated private activity bonds issued by well known customers of the Bank. These securities are regularly monitored as part of an overall credit relationship with the issuers; both issuers were in good standing as of December 31, 2025. HTM corporate debt holdings consist of 11 individual companies in the banking industry. Management conducts periodic reviews of the collectability of these securities taking into consideration such factors as the financial condition of the issuers; each were in good standing as of December 31, 2025.

ACL for HTM Securities: The following table presents the activity in the ACL for HTM debt securities by major security type for the years ended December 31, 2025 and 2024:

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There wasno ACL on U.S. government-sponsored enterprise, agency-backed securities, or mortgage-backed securities as of December 31, 2025. A security is considered to be past due once it is 30 days contractually past due under the terms of the agreement. As of December 31, 2025, none of the Company’s HTM debt securities were past due or on non-accrual status.

Re-Classified Securities: During the third quarter of 2014, the Company transferred securities with a total amortized cost of $89,780,000 and a corresponding fair value of $89,757,000 from AFS to HTM. The net unrealized loss, net of taxes, on these securities at the date of the transfer was $15,000. The net unrealized holding loss at the time of transfer continues to be reported in AOCI, net of tax, and is amortized over the remaining lives of the securities as an adjustment of the yield. The amortization of the net unrealized loss reported in AOCI will offset the effect on interest income of the discount for the transferred securities. The remaining unamortized balance of the net unrealized losses for the securities transferred from AFS to HTM was $38,000, net of taxes, at December 31, 2025. This compares to $47,000, net of taxes, at December 31, 2024. These securities were transferred as a part of the Company's overall investment and balance sheet strategies.

Restricted Equity Securities: The Bank is a member of the FHLBB, a cooperatively owned wholesale bank for housing and finance in thesix New England States. As a requirement of membership in the FHLBB, the Bank must own a minimum required amount of FHLBB stock, calculated periodically based primarily on its level of borrowings from the FHLBB. The Bank uses the FHLBB for a portion of its wholesale funding needs. As of December 31, 2025 and 2024, the Bank's investment in FHLBB stock totaled $7,238,000 and $6,166,000, respectively. FHLBB stock is a non-marketable equity security and therefore is reported at cost, which equals par value.

The Bank is also a member of the FRBB. As a requirement for membership in the FRBB, the Bank must own a minimum required amount of FRBB stock. The Bank uses FRBB for certain correspondent banking services and maintains borrowing capacity at its discount window. The Bank's investment in FRBB stock totaled $1,037,000 at December 31, 2025 and 2024.

The Company periodically evaluates its investment in FHLBB and FRBB stock for impairment based on, among other factors, the capital adequacy of each institution and their overall financial condition. No impairment losses have been recorded through December 31, 2025. The Bank will continue to monitor its investment in these restricted equity securities.

Note 4. Mortgage Servicing Rights

At December 31, 2025 and 2024, the Bank serviced loans for others totaling $276,514,000 and $297,950,000, respectively. Net gains from the sale of loans, the majority of which are serviced by the Bank, totaled $194,000 in 2025, $143,000 in 2024, and $92,000 in 2023. In 2025, mortgage servicing rights of $53,000 were capitalized and amortization for the year totaled $291,000. At December 31, 2025, mortgage servicing rights had a fair value of $2,685,000. In 2024, mortgage servicing rights of $39,000 were capitalized and amortization for the year totaled $322,000. At December 31, 2024, mortgage servicing rights had a fair value of $3,054,000.

FASB ASC Topic 860, "Transfers and Servicing", requires all separately recognized servicing assets and servicing liabilities to be initially measured at fair value, if practicable. Servicing assets and servicing liabilities are reported using the amortization method or the fair value measurement method. In evaluating the carrying values of mortgage servicing rights, the Company obtains third party valuations based on loan level data including note rate, type and term of the underlying loans. The model utilizes several assumptions, the most significant of which are loan prepayments, calculated using athree-month moving average of weekly prepayment data published by the PSA and modeled against the serviced loan portfolio, and the discount rate to discount future cash flows. As of December 31, 2025, the prepayment assumption using the PSA model was 154, which translates into an anticipated annual prepayment rate of 7.39%. The discount rate is 9.38%. Other assumptions include delinquency rates, foreclosure rates, servicing cost inflation, and annual unit loan cost. All assumptions are adjusted periodically to reflect current circumstances. Amortization of mortgage servicing rights, as well as write-offs due to prepayments of the related mortgage loans, are recorded as a charge against mortgage servicing fee income.

Mortgage servicing rights are included in other assets and detailed in the following table:

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Note 5. Loans

The Company periodically reviews and updates the segmentation of its loan portfolio. Updates performed in conjunction with adoption of ASC 326 in 2023 consisted of reporting what had been a single class, commercial real estate loans, as three classes - commercial real estate owner occupied, commercial real estate non-owner occupied, and commercial multi-family. In addition, home equity installment loans which had previously been included in the residential term class were included in the home equity revolving and term class. In the first quarter of 2024, a new segment was established for Agriculture loans, and there have been no subsequent segmentation changes.

Loan Portfolio by Class: The following table shows the composition of the Company's loan portfolio as of December 31, 2025 and 2024:

Loan balances include net deferred loan costs of $12,737,000 in 2025 and $12,457,000 in 2024. Net deferred loan costs have increased from a year ago a due to loan origination unit volume over the period. Loan balances in the Residential Term segment also include a valuation adjustment for fair value swaps hedged by certain loans in the portfolio. This adjustment added $910,000 to the loan balances as of December 31, 2025 and $758,000 to the loan balances as of December 31, 2024. Also included in Residential term loan balances is a valuation adjustment for the market value of interest rate caps which added $371,000 to loan balances as of December 31, 2025. There wasno valuation adjustment for the market value of interest rate caps as of December 31, 2024.

Pledged Loans: Pursuant to collateral agreements, qualifying first mortgage loans and commercial real estate, which totaled $669,541,000 and $626,851,000 at December 31, 2025 and 2024, respectively, were used to collateralize borrowings from the FHLBB. In addition, commercial, residential construction and home equity loans totaling $366,032,000 at December 31, 2025 and $392,562,000 at December 31, 2024 were used to collateralize a standby line of credit at the FRBB.

Loans to Directors, Officers and Employees: Loans to directors, officers and employees totaled $48,681,000 at December 31, 2025 and $54,997,000 at December 31, 2024. A summary of loans to directors and executive officers is as follows:

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Past Due Loans: For all loan classes, loans over 30 days past due are considered delinquent. Information on the past-due status of loans by class of financing receivable as of December 31, 2025, is presented in the following table:

Information on the past-due status of loans by class of financing receivable as of December 31, 2024, is presented in the following table:

Non-Accrual Loans: For all classes, loans are placed on non-accrual status when, based on current information and events, it is probable that the Company will be unable to collect all amounts due according to the contractual terms of the loan agreement or when principal and interest is 90 days or more past due unless the loan is both well secured and in the process of collection (in which case the loan may continue to accrue interest in spite of its past due status). A loan is "well secured" if it is secured (1) by collateral in the form of liens on or pledges of real or personal property, including securities, that have a realizable value sufficient to discharge the debt (including accrued interest) in full, or (2) by the guarantee of a financially responsible party. A loan is "in the process of collection" if collection of the loan is proceeding in due course either (1) through legal action, including judgment enforcement procedures, or, (2) in appropriate circumstances, through collection efforts not involving legal action which are reasonably expected to result in repayment of the debt or in its restoration to a current status in the near future.

Cash payments received on non-accrual loans are applied to reduce the loan's principal balance until the remaining principal balance is deemed collectible, after which interest is recognized when collected. As a general rule, a loan may be restored to accrual status when payments are current for a substantial period of time, generally six months, and repayment of the remaining contractual amounts is expected, or when it otherwise becomes well secured and in the process of collection.

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The following table presents the amortized costs basis of loans on nonaccrual status as of as of December 31, 2025 and 2024 is presented in the following table:

For the years ended December 31, 2025 and 2024, interest income which would have been recognized on these loans, if interest had been accrued, was $466,000 and $172,000, respectively. Loans more than 90 days past due accruing interest totaled $665,000 at December 31, 2025 and $1,020,000 at December 31, 2024. The Company continues to accrue interest on these loans because it believes collection of principal and interest is reasonably assured.

Individually Analyzed Loans: Collectively IAL include loans with balances of $250,000 or more that have either been placed into nonaccrual or are loans identified by management as having characteristics that may impact ultimate collectibility and therefore merit individual analysis. These loans are measured at the present value of expected future cash flows discounted at the loan's effective interest rate or at the fair value of the collateral if the loan is collateral dependent. If the measure of an IAL loan is lower than the recorded investment in the loan and estimated selling costs, a specific reserve is established for the difference, or, in certain situations, if the measure of an IAL loan is lower than the recorded investment in the loan and estimated selling costs, the difference is written off.

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The following table presents the amortized cost basis of collateral-dependent loans as of December 31, 2025 and 2024, by collateral type:

Collateral-dependent loans are loans for which the repayment is expected to be provided substantially by the underlying collateral and there are no other available and reliable sources of repayment.

Loan Modifications to Borrowers Experiencing Financial Difficulty: Loan modifications to borrowers experiencing financial difficulty may include interest rate reduction, term extension, payment deferral, principle forgiveness or a combination thereof. It is the intent to minimize future losses while providing borrowers with financial relief.

The following tables represent loan modifications made to borrowers experiencing financial difficulty by modification type and class of financing receivable, during the year ended December 31, 2025:

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The following tables describe the financial effect of the modifications made to borrowers experiencing financial difficulty for the year ended December 31, 2025:

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The following tables represent loan modifications made to borrowers experiencing financial difficulty by modification type and class of financing receivable, during the year ended December 31, 2024:

The following tables describe the financial effect of the modifications made to borrowers experiencing financial difficulty for the

year ended December 31, 2024:

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The Company monitors the performance of the loans that are modified to borrowers experiencing financial difficulty to understand the effectiveness of its modification efforts. In its monitoring, the Company considers an event of payment default to be a payment past due thirty days or more, and counts all such events even if subsequently cured. The following tables depict the amortized cost basis of loans that had an event of payment default during the years ended December 31, 2025 and 2024 and were modified in the 12 months prior to that default:

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The following tables depict the performance of loans that have been modified during the years ended December 31, 2025 and 2024:

Loans in Process of Foreclosure

As of December 31, 2025, there were seven mortgage loans collateralized by residential real estate with a total balance of $1,754,000 andone home equity line of credit collateralized by residential real estate with a balance of $63,000, in the process of foreclosure. There were also seven commercial loans collateralized by either residential real estate or owner-occupied commercial real estate with a total balance of $3,826,000, in the process of foreclosure. This compares tothree mortgage loans collateralized by residential real estate in the process of foreclosure with a total balance of $192,000 as of December 31, 2024.

Note 6. Allowance for Credit Losses

The ACL is a valuation amount that is deducted from the amortized cost basis of loans to present the net amount expected to be collected on the loans. Loans, or portions thereof, are charged off against the allowance when they are deemed uncollectible. The ACL consists of three elements: (1) specific reserves for loans individually analyzed; (2) general reserves for each portfolio segment; and, (3) qualitative reserves. All outstanding loans are considered in evaluating the appropriateness of the allowance. Loans are segmented by common risk characteristics as delineated in the paragraph below. The Company provides for loan losses through the ACL which represents an estimated reserve for losses in the loan portfolio. To determine an appropriate level for general reserves, a discounted cash flow approach is applied to each portfolio segment implementing a probability of default and loss given default estimate based upon a number of factors including historical losses over an economic cycle, economic forecasts, loan prepayment speeds and curtailment rates. To determine an appropriate level for qualitative reserves, various factors are

The First Bancorp - 2025 Form 10-K - Page 70 considered including underwriting policies, credit administration practices, experience, ability and depth of lending management, and economic factors not captured in the general reserve calculation.

Loan Portfolio Composition & Risk Characteristics: The loan portfolio is segmented into eleven classes and credit risk is evaluated separately in each class. Major risk characteristics relevant to each portfolio segment are as follows:

Commercial Real Estate Owner Occupied - commercial real estate owner occupied loans consist of mortgage loans to finance investments in real property such as retail space, offices, industrial buildings, hotels, educational facilities, and other specific or mixed use properties. Loans are typically written with amortizing payment structures. Collateral values are determined based on appraisals and evaluations in accordance with established policy and regulatory guidelines. Loans typically have a loan-to-value ratio of up to 80% based upon current valuation information at the time the loan is made, and are primarily paid by the cash flow generated from the real property, typically the operating entity of owner occupant. Risk factors typically include competitive market forces, net operating incomes of the operating entity, and overall economic demand. Loans in the recreational and tourism sector can be affected by weather conditions, such as unseasonably low winter snowfalls. Commercial real estate lending also carries a higher degree of environmental risk than other types of lending.

Commercial Real Estate Non-Owner Occupied - commercial real estate loans non-owner occupied share many of the purpose, loan structure and risk characteristics of owner-occupied commercial real estate. The primary differentiating factor from Owner Occupied is that repayment is generally reliant upon cash flow generated from tenants rather than an operating entity. Risk factors are also influenced by vacancy rates, cap rates, lease renewals, and underlying financial health of lessees.

Commercial Construction - commercial construction loans consist of loans to finance construction in a mix of owner- and non-owner occupied commercial real estate properties. Loans typically have construction periods of less thantwo years, and payment structures during the construction period are typically on an interest only basis, although principal payments may be established depending on the type of construction project being financed. During the construction phase, commercial construction loans are primarily paid by cash flow generated from the construction project or other operating cash flows from the borrower or guarantors, if applicable. Commercial construction loans will typically convert to permanent financing from the Company, or loan repayment may come from a third party source in the event that the Company will not be providing permanent term financing. Collateral valuation and loan-to-value guidelines follow those for commercial real estate loans. Commercial construction loans are impacted by factors similar to those for commercial real estate loans in addition to risks related to contractor financial capacity and ability to complete a project within acceptable time frames and within budget.

Commercial and Industrial - C&I loans consist of revolving and term loan obligations extended to business and corporate enterprises for the purpose of financing working capital and or capital investment. C&I loans may be secured or unsecured; when secured, collateral generally consists of pledges of business assets including, but not limited to, accounts receivable, inventory, equipment, and/or other tangible and intangible assets. C&I loans are primarily paid by the operating cash flow of the borrower. A weakened economy, soft consumer spending, and the rising cost of labor or raw materials are examples of issues that can impact the credit quality in this segment.

Commercial Multifamily - multifamily loans share structure and risk characteristics with non-owner occupied commercial real estate; underlying collateral is residential in nature rather than commercial, consisting of properties with five or more units.

Municipal Loans - municipal loans are comprised of loans to municipalities in Maine for capitalized expenditures, construction projects, or tax anticipation notes. All municipal loans are considered either general obligations of the municipality collateralized by the taxing ability of the municipality for repayment of debt or have a pledge of specific revenues. The overall health of the economy, including unemployment rates and housing prices, has an impact on the credit quality of this segment.

Agriculture - agriculture loans consist mostly of amortizing term loans and revolving lines of credit made to borrowers in agriculture related industries. For the Company, this includes loans made to land-based agricultural production and to participants in the fishing industry. Collateral values are determined based on appraisals and evaluations in accordance with established policy and regulatory guidelines. Loans are primarily paid by the cash flow generated from the agricultural property or operation of equipment. Risk factors typically include competitive market forces, overall economic demand for the product, and may be further influenced by weather conditions which impact growing and/or harvesting, or other factors such as changes in government regulation(s).

Residential Real Estate Term - residential term loans consist of residential real estate loans made to borrowers who demonstrate the ability to make scheduled payments with full consideration to underwriting factors. Borrower qualifications include favorable credit history combined with supportive income requirements and loan-to-value ratios within established policy and regulatory guidelines. Collateral values are determined based on appraisals and evaluations in accordance with established policy and regulatory guidelines. Residential loans typically have a loan-to-value ratio of up to 80% based on appraisal information at the time the loan is made. Collateral consists of mortgage liens on one-to four-family residential properties. Loans are offered with fixed or adjustable rates with amortization terms of up tothirty years. The overall health of the economy, including unemployment rates and housing prices, has an impact on the credit quality of this segment.

Residential Real Estate Construction - residential construction loans typically consist of loans for the purpose of constructing single family residences to be owned and occupied by the borrower. Borrower qualifications include favorable credit history combined

The First Bancorp - 2025 Form 10-K - Page 71 with supportive income requirements and loan-to-value ratios within established policy and regulatory guidelines. Residential construction loans normally have construction termsone year or less and payment during the construction term is typically on an interest only basis from sources including interest reserves, borrower liquidity, and/or income. Residential construction loans will typically convert to permanent financing from the Company or have another financing commitment in place from an acceptable mortgage lender. Collateral valuation and loan-to-value guidelines are consistent with those for residential term loans. Residential construction loans are impacted by factors similar to those for residential real estate term loans in addition to risks related to contractor financial capacity and ability to complete a project within acceptable time frames and within budget.

Home Equity Revolving and Term - home equity revolving and term loans are made to qualified individuals and are secured by senior or junior mortgage liens on owner occupied one- to four-family homes, condominiums, or vacation homes. The home equity line of credit typically has a variable interest rate and is billed as interest-only payments during the draw period. At the end of the draw period, the home equity line of credit is billed as a percentage of the principal balance plus all accrued interest. Loan maturities are normally 300 months. Borrower qualifications include favorable credit history combined with supportive income requirements and combined loan-to-value ratios usually not exceeding 80% inclusive of priority liens. Collateral valuation guidelines follow those for residential real estate loans. The overall health of the economy, including unemployment rates and housing prices, has an impact on the credit quality of this segment.

Consumer - consumer loans include personal lines of credit and amortizing loans made to qualified individuals for various purposes such as autos, recreational vehicles, debt consolidation, personal expenses, or overdraft protection. Borrower qualifications include favorable credit history combined with supportive income and collateral requirements within established policy guidelines. Consumer loans may be secured or unsecured. The overall health of the economy, including unemployment rates, has an impact on the credit quality of this segment.

Construction, land, and land development: CLLD loans, both commercial and residential, represented 22.8% of total Bank capital as of December 31, 2025 and remain below the regulatory guidance of 100.0% of total Bank capital. Construction loans and non-owner-occupied commercial real estate loans represented 207.1% of total Bank capital at December 31, 2025, below the regulatory guidance of 300.0% of total Bank capital.

The First Bancorp - 2025 Form 10-K - Page 72

Composition of the ACL: The following table summarizes the composition of the ACL, by class of financing receivable and allowance, as of December 31, 2025 and 2024:

The First Bancorp - 2025 Form 10-K - Page 73

A breakdown of the ACL as of December 31, 2025 and 2024, by class of financing receivable and allowance element, is presented in the following tables:

The ACL as a percent of total loans stood at 1.06% as of December 31, 2025, and December 31, 2024.

The First Bancorp - 2025 Form 10-K - Page 74

Off-Balance Sheet Credit Exposures: In the ordinary course of business, the Company enters into commitments to extend credit, including construction lines of credit, revolving lines of credit, written commitments to provide financing, commercial letters of credit and standby letters of credit. Such financial instruments are recorded as loans when they are funded.

Allowance for Credit Losses on Off-Balance Sheet Credit Exposures: The Company estimates expected credit losses over the contractual period in which the Company is exposed to credit risk via a contractual obligation to extend credit, unless that obligation is unconditionally cancellable by the Company. The ACL on off-balance sheet credit exposures is adjusted through credit loss expense and any adjustment is recognized in net income. To appropriately measure expected credit losses, management disaggregates off-balance sheet credit exposures into similar risk characteristics, identical to those determined for the loan portfolio. An estimated funding rate is then applied to the qualifying unfunded loan commitments and letters of credit using the Company’s own historical experience to estimate the expected funded amount for each loan segment as of the reporting date. Once the expected funded amount for each loan segment is determined, the loss rate, which is the calculated expected loan loss as a percent of the amortized cost basis for each loan segment, is applied to calculate the ACL on off-balance sheet credit exposures as of the reporting date. The Company’s ACL on unfunded commitments is recognized as a liability, included within other liabilities on the consolidated balance sheets.

The following table presents the activity in the ACL for off-balance sheet credit exposures for the years ended December 31, 2025 and 2024:

The First Bancorp - 2025 Form 10-K - Page 75

Credit Quality Indicators: To monitor the credit quality of its loan portfolio, management applies an internal risk rating system to categorize commercial loan segments. Approximately 60% of commercial loan outstanding balances are subject to review and validation annually by an independent consulting firm. Additionally, commercial loan relationships with exposure greater than or equal to $1,000,000 are subject to review annually by the Company's internal credit review function.

The risk rating system has eight levels, defined as follows:

1 Strong

Credits rated "1" are characterized by borrowers fully responsible for the credit with excellent capacity to pay principal and interest. Loans rated "1" may be secured with acceptable forms of liquid collateral.

2 Above Average

Credits rated "2" are characterized by borrowers that have better than average liquidity, capitalization, earnings, and/or cash flow with a consistent record of solid financial performance.

3 Satisfactory

Credits rated "3" are characterized by borrowers with favorable liquidity, profitability, and financial condition with adequate cash flow to pay debt service.

4 Average

Credits rated "4" are characterized by borrowers that present more risk than 1, 2 and 3 rated loans and merit an ordinary level of ongoing monitoring. Financial condition is on par or somewhat below industry averages while cash flow is generally adequate to meet debt service requirements.

5 Watch

Credits rated "5" are characterized by borrowers that warrant greater monitoring due to financial condition or unresolved and identified risk factors.

6 Other Assets Especially Mentioned

Loans in this category are currently protected but are potentially weak and constitute an undue and unwarranted credit risk, but not to the point of justifying a classification of substandard. OAEM have potential weaknesses which may, if not checked or corrected, weaken the asset or inadequately protect the Company's credit position at some future date.

7 Substandard

Loans in this category are inadequately protected by the paying capacity of the borrower or of the collateral pledged, if any. Loans so classified have a well-defined weakness or weaknesses that jeopardize the liquidation of the debt. Substandard loans are characterized by the distinct possibility that the Company may sustain some loss if the deficiencies are not corrected.

8 Doubtful

Loans classified "Doubtful" have the same weaknesses as those classified substandard with the added characteristic that the weaknesses make collection or liquidation in full, based on currently existing facts, conditions, and values, highly questionable and improbable. The possibility of loss is high, but because of certain important and reasonably specific pending factors which may work to the advantage and strengthening of the asset, its classification as an estimated loss is deferred until its more exact status may be determined.

Most residential real estate, home equity, and consumer loans are not assigned ratings; therefore they are categorized as performing and non-performing loans. Performing loans include loans that are current and loans that are past due less than 90 days. Loans that are past due more than 90 days are considered non-performing.

The First Bancorp - 2025 Form 10-K - Page 76

The following table summarizes the credit quality for the Company's portfolio by risk category of loans and by class by vintage as of December 31, 2025:

The First Bancorp - 2025 Form 10-K - Page 77

The First Bancorp - 2025 Form 10-K - Page 78

The following table summarizes the credit quality for the Company's portfolio by risk category of loans and by class by vintage as of December 31, 2024:

The First Bancorp - 2025 Form 10-K - Page 79

The First Bancorp - 2025 Form 10-K - Page 80

The following table presents ACL activity by class for the year ended December 31, 2025:

The following table presents ACL activity by class for the year ended December 31, 2024:

The following table presents allowance for loan losses activity by class for the year ended December 31, 2023:

The First Bancorp - 2025 Form 10-K - Page 81

As of December 31, 2025 and 2024, the significant model inputs and assumptions used within the discounted cash flow model for purposes of estimating the ACL on loans were:

Macroeconomic (loss) drivers: The following loss drivers for each loan segment were used to calculate the expected probability of default over the forecast and reversion period:

•Commercial Real Estate Owner Occupied: FOMC median forecasts of national unemployment

•Commercial Real Estate Non-Owner Occupied: FOMC median forecasts of national unemployment

•Commercial Construction: FOMC median forecasts of national unemployment and change in national real GDP

•Commercial & Industrial: FOMC median forecasts of national unemployment and change in national real GDP

•Commercial Multifamily: FOMC median forecast of national unemployment

•Commercial Agriculture: FOMC median forecasts of national unemployment and change in national real GDP

•Municipal: Probability of default is measured based upon an index supplied by a nationally recognized ratings agency

•Residential Real Estate Term: FOMC median forecasts of national unemployment

•Residential Real Estate Construction: FOMC median forecast of national unemployment and change in national real GDP

•Home Equity Revolving & Term: FOMC median forecasts of national unemployment

•Consumer: FOMC median forecast of national unemployment and forecasted retail sales sourced from nationally known provider

Reasonable and supportable forecast period: The ACL on loans estimate used a reasonable and supportable forecast period of one year.

Reversion period: The ACL on loans estimate used a reversion period of one year.

Prepayment speeds: The estimate of prepayment speed for each loan segment is updated quarterly and derived using internally sourced prepayment data.

Qualitative factors: The ACL on loans estimate incorporated various qualitative factors into the calculation such as changes in lending policies, changes in the nature and volume and terms of loans, changes in the experience, depth and ability of lending management, and economic factors not captured in the quantitative model.

The First Bancorp - 2025 Form 10-K - Page 82

Note 7. Premises and Equipment

Premises and equipment are carried at cost and consist of the following:

Future minimum receipts under lease agreements at December 31, 2025 by year and in the aggregate are:

Leases

The Company enters into operating leases in the normal course of business primarily for bank branch locations. The Company's operating leases have remaining terms ranging fromone to 17 years, including options to renew.

The right‑of‑use asset and lease liability by lease type, and the associated balance sheet classifications as of December 31, 2025 and 2024 were as follows:

Supplemental Lease Information

Lease expense for the year ended December 31, 2025 related to these leases was $97,000. There was $97,000 in lease expense for 2024 and $97,000 for 2023.

The First Bancorp - 2025 Form 10-K - Page 83

Future lease payments for operating leases with initial terms of one year or more as of December 31, 2025 are as follows:

Note 8. Other Real Estate Owned

The following summarizes OREO:

Changes in the allowance for losses from OREO were as follows:

Note 9. Income Taxes

The current and deferred components of income tax expense (benefit) were as follows:

The First Bancorp - 2025 Form 10-K - Page 84

The actual tax expense differs from the expected tax expense (computed by applying the applicable U.S. Federal corporate income tax rate to income before income taxes) as follows:

State taxes in Maine made up the majority (greater than 50%) of the effect of the state and local income tax category.

Income taxes paid were as follows:

The First Bancorp - 2025 Form 10-K - Page 85

Deferred tax assets and liabilities are classified in other assets and other liabilities in the consolidated balance sheets. No valuation allowance is deemed necessary for the deferred tax asset. Items that give rise to the deferred income tax assets and liabilities and the tax effect of each at December 31, 2025 and 2024 are as follows:

The Company invests in low income housing and historical tax credit structures. At December 31, 2025 and 2024, the carrying value of these investments was $3,224,000 and $2,069,000, respectively, and is recorded inother assets. Total unfunded commitments related to the investments in tax credit structures totaled $3,946,000 and $2,826,000 at December 31, 2025 and 2024, respectively. The company expects to fulfill these commitments during 2026 and 2027. Amortization of the investments in these entities totaled $1,253,000 and $1,029,000 for the years ended December 31, 2025 and 2024, respectively, and is recognized as a component ofincome tax expense in the consolidated statements of income and shown asamortization of investments in tax credit structures on the consolidated statements of cash flows. The tax credits from the investments are estimated at $1,527,000 and $1,228,000 for the years ended December 31, 2025 and 2024, respectively, and are recorded as a reduction of income tax expense.

FASB ASC Topic 740, "Income Taxes," defines the criteria that an individual tax position must satisfy for some or all of the benefits of that position to be recognized in a company's financial statements. Topic 740 prescribes a recognition threshold of more-likely-than-not, and a measurement attribute for all tax positions taken or expected to be taken on a tax return, in order for those tax positions to be recognized in the financial statements. The Company is currently open to audit under the statute of limitations by the IRS for the years ended December 31, 2022 through 2025.

The First Bancorp - 2025 Form 10-K - Page 86

Note 10. Certificates of Deposit

The following table represents the breakdown of CDs at December 31, 2025 and 2024:

At December 31, 2025, the scheduled maturities of CDs are as follows:

The First Bancorp - 2025 Form 10-K - Page 87

Note 11. Borrowed Funds

Borrowed funds may consist of Discount Window borrowings from the FRB, advances from the FHLB and securities sold under agreements to repurchase with customers. Pursuant to collateral agreements, FHLB advances are collateralized by all stock in FHLB, qualifying first mortgage loans, U.S. Government and Agency securities not pledged to others, and funds on deposit with FHLB. All FHLB advances as of December 31, 2025 had fixed rates of interest until their respective maturity dates. Securities sold under agreements to repurchase include U.S. agencies securities and other securities. Repurchase agreements have maturity dates ranging fromone day toone year. The Bank also has in place $101,000,000 in credit lines with correspondent banks and a credit facility of $313,000,000 with the FRBB using securities, commercial loans and home equity loans as collateral. Of the correspondent bank and FRB credit lines, none were in use as of December 31, 2025.

Borrowed funds at December 31, 2025 and 2024 have the following range of interest rates and maturity dates:

Note 12. Employee Benefit Plans

401(k) Plan

The Bank has a defined contribution plan available to substantially all employees who have completed three months of service. Employees may contribute up to Internal Revenue Service determined limits and the Bank may provide a match to employee contributions not to exceed 3.0% of compensation depending on contribution level. The Plan is a safe harbor plan whereby the Bank also contributes a minimum 3.0% of annual compensation to the plan for all eligible employees. The expense related to the 401(k) plan was $1,083,000, $1,108,000, and $1,067,000 in 2025, 2024, and 2023, respectively.

The First Bancorp - 2025 Form 10-K - Page 88

Deferred Compensation and Supplemental Retirement Plan

The Bank also provides unfunded supplemental retirement benefits for certain officers, payable in installments over 20 years commencing upon retirement or death. The agreements consist of individual contracts with differing characteristics that, when taken together, do not constitute a post-retirement plan. There are no active officers eligible for these benefits. The costs for these benefits are recognized over the service periods of the participating officers in accordance with FASB ASC Topic 712, "Compensation – Nonretirement Postemployment Benefits". The expense of these supplemental plans was $169,000 in 2025, $201,000 in 2024, and $57,000 in 2023. As of December 31, 2025 and 2024, the accrued liability of these plans was $2,460,000 and $2,578,000, respectively, and is recorded in other liabilities.

Postretirement Benefit Plans

The Bank sponsorstwo postretirement benefit plans. One plan currently provides a subsidy for health insurance premiums to certain retired employees; these subsidies are based on years of service and range between $40 and $1,200 per month per person. The other plan provides life insurance coverage to certain retired employees and health insurance for retired directors. None of these plans are prefunded. The Company utilizes FASB ASC Topic 712 to recognize the overfunded or underfunded status of a defined benefit postretirement plan as an asset or liability in its balance sheet and to recognize changes in the funded status in the year in which the changes occur through OCI.

The following table sets forth the accumulated post-retirement benefit obligation and funded status:

The following table sets forth the net periodic benefit cost:

The measurement date for benefit obligations was as of year-end for all years presented. The estimated amount of benefits to be paid in 2026 is $85,000. For years ending 2027 through 2030, the estimated amount of benefits to be paid is $83,000, $80,000, $77,000 and $75,000, respectively, and the total estimated amount of benefits to be paid for years ended 2030 through 2033 is $328,000. Per actuarial projections, plan expense for 2026 is estimated to be $0.

The First Bancorp - 2025 Form 10-K - Page 89

In accordance with FASB ASC Topic 715, "Compensation – Retirement Benefits", amounts not yet reflected in net periodic benefit cost and included in AOCI are as follows:

Note 13. Other Comprehensive Income (Loss)

The following table summarizes activity in the unrealized gain or loss on AFS securities included in OCI for the years ended December 31, 2025, 2024 and 2023:

The reclassification of realized gains is included in the net securities gains line of the consolidated statements of income and comprehensive income and the tax effect is included in the income tax expense line of the same statement.

The following table summarizes activity in the unrealized loss on securities transferred from AFS to HTM included in OCI for the years ended December 31, 2025, 2024, and 2023:

The following table represents the effect of the Company's derivative financial instruments included in OCI for the years ended December 31, 2025, 2024, and 2023:

The First Bancorp - 2025 Form 10-K - Page 90

The following table summarizes activity in the unrealized gain or loss on postretirement benefits included in OCI for the years ended December 31, 2025, 2024, and 2023:

The reclassification of accumulated losses is a component of net periodic benefit cost (see Note 12) and the income tax effect is included in the income tax expense line of the consolidated statements of income and comprehensive income.

The First Bancorp - 2025 Form 10-K - Page 91

Note 14 -Financial Derivative Instruments

The Bank uses derivative financial instruments for risk management purposes and not for trading or speculative purposes. As part of its overall asset and liability management strategy, the Bank periodically uses derivative instruments to minimize significant unplanned fluctuations in earnings and cash flows caused by interest rate volatility. The Bank’s interest rate risk management strategy involves modifying the re-pricing characteristics of certain assets or liabilities so that changes in interest rates do not have a significant effect on net interest income.

The Bank recognizes its derivative instruments in the consolidated balance sheets at fair value. On the date the derivative instrument is entered into, the Bank designates whether the derivative is part of a hedging relationship (i.e., cash flow or fair value hedge). The Bank formally documents relationships between hedging instruments and hedged items, as well as its risk management objective and strategy for undertaking hedge transactions. The Bank also assesses, both at the hedge’s inception and on an ongoing basis, whether the derivatives used in hedging transactions are highly effective in offsetting the changes in cash flows or fair values of hedged items. Changes in fair value of derivative instruments that are highly effective and qualify as cash flow hedges are recorded in OCI. Any ineffective portion is recorded in earnings. The Bank discontinues hedge accounting when it is determined that the derivative is no longer highly effective in offsetting changes of the hedged risk on the hedged item, or management determines that the designation of the derivative as a hedging instrument is no longer appropriate.

The details of the Bank's swap agreements are as follows:

The details of the Bank's cap agreements are as follows:

The First Bancorp - 2025 Form 10-K - Page 92

For cash flow hedges, the Company would reclassify unrealized gains or losses accounted for within AOCI into earnings if the interest rate cap or swap position(s) were to become ineffective or were to be terminated. For fair value hedges, any gain or loss resulting from a determination of ineffectiveness or from termination would be amortized for the remaining life of the hedged instrument. In the second quarter of 2025, a fair value swap with a notional amount of $40,000,000 was terminated; the termination fee paid by the Bank is being amortized over the remaining lives of the underlying hedged instruments. Amounts paid or received under derivative instruments are reported in interest income or interest expense in the consolidated statements of income, and reflected in net income in the consolidated statements of cash flows.

Customer loan derivatives

The Bank will enter into interest rate swaps with qualified commercial customers. Through these arrangements, the Bank is able to provide a means for a loan customer to obtain a long-term fixed rate, while it simultaneously contracts with an approved, highly-rated, third-party financial institution as counterparty to swap the fixed rate for a variable rate. Such loan level arrangements are not designated as hedges for accounting purposes, and are recorded at fair value in the Company’s consolidated balance sheets.

At December 31, 2025 there were 18 customer loan swap arrangements in place. This compares to 10 customer loan swap arrangements in place at December 31, 2024. The details of the Bank's customer loan swap arrangements are detailed below:

Derivative collateral

The Company has entered into a master netting arrangement with its counterparty and settles payments with the counterparty as necessary. The Bank's arrangement with its institutional counterparty requires it to post cash or other assets as collateral for its various swap contracts in a net liability position based on their fair values and the Bank's credit rating or receive cash collateral for contracts in a net asset position, as requested. At December 31, 2025, there wasno collateral posted on its swap contracts or required amount to be pledged.

The First Bancorp - 2025 Form 10-K - Page 93

Note 15. Common Stock

In 2016, the Company reserved 250,000 shares of its common stock to be made available to directors and employees who elect to participate in the stock purchase or savings and investment plans. As of December 31, 2025,150,228 shares had been issued pursuant to these plans, leaving 99,772 shares available for future use. The issuance price is based on the market price of the stock at issuance date. Sales of stock to directors and employees amounted to 20,028 shares in 2025,18,535 shares in 2024, and 17,472 shares in 2023.

In 2001, the Company established a dividend reinvestment plan to allow shareholders to use their cash dividends for the automatic purchase of shares in the Company. The plan was amended in 2018 to reflect changes in its administration. When the plan was established,600,000 shares were registered with the Securities and Exchange Commission, and as of December 31, 2025,363,633 shares have been issued, leaving 236,367 shares available for future issuance. Participation in this plan is optional and at the individual discretion of each shareholder. Shares are purchased for the plan from the Company at a price per share equal to the average of the daily bid and asked prices reported on the NASDAQ System for the five trading days immediately preceding, but not including, the dividend payment date. Sales of stock under the dividend reinvestment plan amounted to 16,619 shares in 2025,15,908 shares in 2024, and 14,418 shares in 2023.

Proceeds from issuances of common stock under these plans totaled $916,000, $867,000 and $817,000 for the years ended December 31, 2025, 2024 and 2023, respectively.

Note 16. Stock Options and Stock-Based Compensation

At the 2020 Annual Meeting, shareholders approved the 2020 Equity Incentive Plan (the "2020 Plan"). There are 400,000 shares of common stock reserved for issuance pursuant to the 2020 Plan in connection with stock options, restricted stock awards, and other equity based awards to attract and retain the best available personnel, provide additional incentive to officers, employees, and non-employee Directors, and promote the success of the Company. Such grants and awards will be structured in a manner that does not encourage the recipients to expose the Company to undue or inappropriate risk. Options issued under the 2020 Plan qualify for treatment as incentive stock options for purposes of Section 422 of the Internal Revenue Code. Other compensation under the 2020 Plan qualifies as performance-based for purposes of Section 162(m) of the Internal Revenue Code, and satisfies NASDAQ guidelines relating to equity compensation.

As of December 31, 2025,172,916 shares of restricted stock had been granted under the 2020 Plan, of which 93,874 shares remain restricted as of December 31, 2025 as detailed in the following table:

The compensation cost related to these restricted stock grants was $2,533,000 and will be recognized over the vesting terms of each grant. In 2025, $966,000 of expense was recognized for these restricted shares, leaving $872,000 in unrecognized expense as of December 31, 2025. In 2024, $895,000 of expense was recognized for restricted shares, leaving $770,000 in unrecognized expense as of December 31, 2024.

The First Bancorp - 2025 Form 10-K - Page 94

Note 17. Earnings Per Share

The following table provides detail for basic EPS and diluted EPS for the years ended December 31, 2025, 2024 and 2023:

All EPS calculations have been made using the weighted average number of shares outstanding during the period. The dilutive securities are shares of restricted stock granted to certain key members of Management. The dilutive number of shares has been calculated using the treasury method, assuming that all granted stock was vested at the end of each period.

The First Bancorp - 2025 Form 10-K - Page 95

Note 18. Regulatory Capital Requirements

The ability of the Company to pay cash dividends to its shareholders depends primarily on receipt of dividends from its subsidiary, the Bank. The Bank may pay dividends to its parent out of so much of its net income as the Bank's directors deem appropriate, subject to the limitation that the total of all dividends declared by the Bank in any calendar year may not exceed the total of its net income of that year combined with its retained net income of the preceding two years and subject to minimum regulatory capital requirements. The amount available for dividends in 2026 will be 2026 earnings plus retained earnings of $31,814,000 from 2025 and 2024.

The payment of dividends by the Company is also affected by various regulatory requirements and policies, such as the requirements to maintain adequate capital. In addition, if, in the opinion of the applicable regulatory authority, a bank under its jurisdiction is engaged in or is about to engage in an unsafe or unsound practice (which, depending on the financial condition of the bank, could include the payment of dividends), that authority may require, after notice and hearing, that such bank cease and desist from that practice. The Federal Reserve Bank and the Comptroller of the Currency have each indicated that paying dividends that deplete a bank's capital base to an inadequate level would be an unsafe and unsound banking practice. The Federal Reserve Bank, the Comptroller of the Currency and the Federal Deposit Insurance Corporation have issued policy statements which provide that bank holding companies and insured banks should generally only pay dividends out of current operating earnings.

In addition to the effect on the payment of dividends, failure to meet minimum capital requirements can also result in mandatory and discretionary actions by regulators that, if undertaken, could have an impact on the Company's operations. Under capital adequacy guidelines and the regulatory framework for prompt corrective action, the Bank must meet specific capital guidelines that involve quantitative measurements of the Bank's assets, liabilities, and certain off-balance-sheet items as calculated under regulatory accounting practices. The Bank's capital amounts and classifications are also subject to qualitative judgments by the regulators about components, risk weightings, and other factors.

Financial institution regulators have established guidelines for minimum capital ratios for banks and bank holding companies. The net unrealized gain or loss on securities AFS is generally not included in computing regulatory capital. The Company maintains its capital in accordance with the Basel III regulatory capital framework as approved by the federal banking agencies. To avoid limitations on capital distributions, including dividend payments, the Company must hold a capital conservation buffer above the adequately capitalized risk-based capital ratios. As of December 31, 2025, the Company's capital conservation buffer was 6.02%, and met the minimum requirement of 2.5%.

As of December 31, 2025, the most recent notification from the Office of the Comptroller of the Currency classified the Bank as well-capitalized under the regulatory framework for prompt corrective action. To be categorized as well-capitalized, the Bank must maintain minimum total risk-based, Tier 1 risk-based, common equity Tier 1 risk-based and Tier 1 leverage ratios as set forth in the table. There are no conditions or events since this notification that Management believes have changed the Bank's category.

The First Bancorp - 2025 Form 10-K - Page 96

The actual and minimum capital amounts and ratios for the Bank are presented in the following table:

The First Bancorp - 2025 Form 10-K - Page 97

The actual and minimum capital amounts and ratios for the Company, on a consolidated basis, are presented in the following table:

Note 19. Off-Balance-Sheet Financial Credit Exposures and Contractual Obligations

Contractual Obligations

The Bank is party to financial instruments with off-balance-sheet risk in the normal course of business to meet the financing needs of its customers. These financial instruments include commitments to originate loans, commitments for unused lines of credit, and standby letters of credit. The instruments involve, to varying degrees, elements of credit risk in excess of the amount recognized in the consolidated balance sheets. The contract amounts of those instruments reflect the extent of involvement the Bank has in particular classes of financial instruments.

Commitments for unused lines of credit are agreements to lend to a customer provided there is no violation of any condition established in the contract. Commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. Since many of the commitments are expected to expire without being drawn upon, the total commitment amounts do not necessarily represent future cash requirements. The Bank evaluates each customer's creditworthiness on a case-by-case basis. The amount of collateral obtained, if deemed necessary by the Bank upon extension of credit, is based on Management's credit evaluation of the borrower. The Bank did not incur any losses on its commitments in 2025, 2024 or 2023.

Standby letters of credit are conditional commitments issued by the Bank to guarantee a customer's performance to a third party, with the customer being obligated to repay (with interest) any amounts paid out by the Bank under the letter of credit. The credit risk involved in issuing letters of credit is essentially the same as that involved in extending loans to customers.

The Bank's exposure to credit loss in the event of nonperformance by the other party to the financial instrument for loan commitments and standby letters of credit is represented by the contractual amount of those instruments. The Bank uses the same credit policies in making commitments and conditional obligations as it does for on-balance sheet instruments.

The First Bancorp - 2025 Form 10-K - Page 98

At December 31, 2025 and 2024, the Bank had the following off-balance-sheet financial instruments, whose contract amounts represent credit risk:

The Bank grants residential, commercial and consumer loans to customers principally located in the Mid-Coast and Down East regions of Maine. Collateral on these loans typically consists of residential or commercial real estate, or personal property. Although the loan portfolio is diversified, a substantial portion of borrowers' ability to honor their contracts is dependent on the economic conditions in the area, especially in the real estate sector.

Derivative Financial Instruments Designated as Hedges

As part of its overall asset and liability management strategy, the Bank periodically uses derivative instruments to minimize significant unplanned fluctuations in earnings and cash flows caused by interest rate volatility. The Bank's interest rate risk management strategy involves modifying the re-pricing characteristics of certain assets and/or liabilities to mitigate adverse impacts upon net interest income resulting from interest rate changes. Derivative instruments that Management periodically uses as part of its interest rate risk management strategy may include interest rate swap agreements, interest rate floor agreements, and interest rate cap agreements.

At December 31, 2025, the Bank hadone outstanding off-balance sheet, derivative instrument, designated as a cash flow hedge andfour off-balance sheet, derivative instruments, designated as fair value hedges. Notional principal amounts totaled $75,000,000 and $160,000,000, respectively, with a cumulative unrealized loss of $597,000, net of taxes. The notional amounts and net unrealized gain (loss) of the financial derivative instruments do not represent exposure to credit loss. The Bank is exposed to credit loss only to the extent the counterparty defaults in its responsibility to pay interest under the terms of the agreements. The credit risk in derivative instruments is mitigated by entering into transactions with highly-rated counterparties that Management believes to be creditworthy and by limiting the amount of exposure to each counter-party. At December 31, 2025, the Bank's derivative instrument counterparties had a composite credit rating of “A-” based upon the ratings of several major credit rating agencies. The interest rate swap agreements were entered into by the Bank to limit its exposure to rising interest rates.

The Bank also enters into swap arrangements with qualified loan customers as a means to provide these customers with access to long-term fixed interest rates for borrowings, and simultaneously enters into a swap contract with an approved third- party financial institution. The terms of the contracts are designed to offset one another resulting in there being neither a net gain or a loss. The notional amounts of the financial derivative instruments do not represent exposure to credit loss. The Bank is exposed to credit loss only to the extent that either counter-party defaults in its responsibility to pay interest under the terms of the agreements. Credit risk is mitigated by prudent underwriting of the loan customer and financial institution counterparties. As of December 31, 2025, the Bank had 18 customer loan swap contracts in place with a total notional value of $169,290,000.

Note 20. Fair Value Disclosures

Certain assets and liabilities are recorded at fair value to provide additional insight into the Company's quality of earnings. Some of these assets and liabilities are measured on a recurring basis while others are measured on a nonrecurring basis, with the determination based upon applicable existing accounting pronouncements. For example, securities AFS are recorded at fair value on a recurring basis. Other assets, such as other real estate owned and IAL, are recorded at fair value on a nonrecurring basis using the lower of cost or market methodology to determine impairment of individual assets. The Company groups assets and liabilities, which are recorded at fair value in three levels, based on the markets in which the assets and liabilities are traded and the reliability of the assumptions used to determine fair value. A financial instrument's level within the fair value hierarchy is based on the lowest level of input that is significant to the fair value measurement (with level 1 considered highest and level 3 considered lowest). A brief description of each level follows:

Level 1 - Valuation is based upon quoted prices for identical instruments in active markets.

Level 2 - Valuation is based upon quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active, and model-based valuation techniques for which all significant assumptions are observable in the market.

The First Bancorp - 2025 Form 10-K - Page 99

Level 3 – Valuation is generated from model-based techniques that use at least one significant assumption not observable in the market. These unobservable assumptions reflect estimates that market participants would use in pricing the asset or liability. Valuation includes use of discounted cash flow models and similar techniques.

The fair value methods and assumptions for the Company's financial instruments and other assets measured at fair value are set forth below.

Investment Securities

The fair values of investment securities are estimated by independent providers using a market approach with observable inputs, including matrix pricing and recent transactions. In obtaining such valuation information from third parties, the Company has evaluated their valuation methodologies used to develop the fair values in order to determine whether the valuations are representative of an exit price in the Company's principal markets. The Company's principal markets for its securities portfolios are the secondary institutional markets, with an exit price that is predominantly reflective of bid level pricing in those markets. Fair values are calculated based on the value of one unit without regard to any premium or discount that may result from concentrations of ownership of a financial instrument, possible tax ramifications, or estimated transaction costs. If these considerations had been incorporated into the fair value estimates, the aggregate fair value could have been changed. The carrying values of restricted equity securities approximate fair values. As such, the Company classifies investment securities as Level 2.

Loans

Fair values are estimated for portfolios of loans held for investment based on an exit pricing notion. The fair values of performing loans are calculated by discounting scheduled cash flows through the estimated maturity using estimated market discount rates that reflect the credit and interest risk inherent in the loan. The estimates of maturity are based on the Company's historical experience with repayments for each loan classification, modified, as required, by an estimate of the effect of current economic and lending conditions, and the effects of estimated prepayments. Assumptions regarding credit risk, cash flows, and discount rates are judgmentally determined using available market information and specific borrower information. Management has made estimates of fair value using discount rates that it believes to be reasonable. However, because there is no market for many of these financial instruments, Management has no basis to determine whether the fair value presented above would be indicative of the value negotiated in an actual sale. As such, the Company classifies loans as Level 3, except for certain IAL. Fair values of IAL are based on estimated cash flows and are discounted using a rate commensurate with the risk associated with the estimated cash flows, or if collateral dependent, discounted to the appraised value of the collateral as determined by reference to sale prices of similar properties, less costs to sell. As such, the Company classifies IAL for which a specific reserve results in a fair value measure as Level 2. All other IAL are classified as Level 3. Management has elected to exclude loans held for sale from its fair value presentation. Loans held for sale typically consists solely of residential mortgage loans originated for sale in the secondary market which have been contracted to be sold at a specified price above par, are often de-minimus in amount, and are assets of the Bank for a short period of time, generally less than ten business days.

Real estate acquired through foreclosure is initially recorded at fair value. The fair value of OREO is generally based on property appraisals and an analysis of sales prices of similar properties currently available. As such, the Company records OREO as nonrecurring Level 2.

Mortgage Servicing Rights

Mortgage servicing rights represent the value associated with servicing residential mortgage loans. Servicing assets and servicing liabilities are reported using the amortization method and compared to fair value for impairment. In evaluating the fair values of mortgage servicing rights, the Company obtains third party valuations based on loan level data including note rate, type and term of the underlying loans. As such, the Company classifies mortgage servicing rights as Level 2.

Time Deposits

The fair value of maturity deposits is based on the discounted value of contractual cash flows using a replacement cost of funds approach. The discount rate is estimated using the cost of funds borrowing rate in the market. As such, the Company classifies deposits as Level 2.

Borrowed Funds

The fair value of borrowed funds is based on the discounted value of contractual cash flows. The discount rate is estimated using the rates currently available for borrowings of similar remaining maturities. As such, the Company classifies borrowed funds as Level 2.

The First Bancorp - 2025 Form 10-K - Page 100

Derivatives

The fair value of interest rate swaps is determined using inputs that are observable in the market place obtained from third parties including yield curves, publicly available volatilities, and floating indexes and, accordingly, are classified as Level 2 inputs. The credit value adjustments associated with derivatives utilize Level 3 inputs, such as estimates of current credit spreads to evaluate the likelihood of default by the Company and its counterparties. As of December 31, 2025 and 2024, the Company has assessed the significance of the impact of the credit valuation adjustments on the overall valuation of its derivative positions and has determined that the credit valuation adjustments are not significant to the overall valuation of its derivatives due to collateral postings.

Customer Loan Derivatives

The valuation of the Company’s customer loan derivatives is obtained from a third-party pricing service and is determined using a discounted cash flow analysis on the expected cash flows of each derivative. The pricing analysis is based on observable inputs for the contractual terms of the derivatives, including the period to maturity and interest rate curves. The Company incorporates credit valuation adjustments to appropriately reflect both its own nonperformance risk and the respective counterparty’s nonperformance risk in the fair value measurements. In adjusting the fair value of its derivative contracts for the effect of nonperformance risk, the Company has considered the impact of master netting arrangements and any applicable credit enhancements, such as collateral postings.

Limitations

Fair value estimates are made at a specific point in time, based on relevant market information and information about the financial instrument. These values do not reflect any premium or discount that could result from offering for sale at one time the Company's entire holdings of a particular financial instrument. Because no market exists for a significant portion of the Company's financial instruments, fair value estimates are based on Management's judgments regarding future expected loss experience, current economic conditions, risk characteristics of various financial instruments, and other factors. These estimates are subjective in nature and involve uncertainties and matters of significant judgment and therefore cannot be determined with precision. Changes in assumptions could significantly affect the estimates. Fair value estimates are based on existing on- and off-balance-sheet financial instruments without attempting to estimate the value of anticipated future business and the value of assets and liabilities that are not considered financial instruments. Other significant assets and liabilities that are not considered financial instruments include the deferred tax asset, premises and equipment, and other real estate owned. In addition, tax ramifications related to the realization of the unrealized gains and losses can have a significant effect on fair value estimates and have not been considered in any of the estimates.

The First Bancorp - 2025 Form 10-K - Page 101

Assets and Liabilities Recorded at Fair Value on a Recurring Basis

The following tables present the balances of assets and liabilities that were measured at fair value on a recurring basis as of December 31, 2025 and 2024.

The First Bancorp - 2025 Form 10-K - Page 102

Assets and Liabilities Recorded at Fair Value on a Non-Recurring Basis

The following tables present assets measured at fair value on a nonrecurring basis that have had a fair value adjustment since their initial recognition. Mortgage servicing rights are presented at fair value withno impairment reserve at at December 31, 2025 and 2024. There wasno OREO or related allowance at December 31, 2025. OREO is presented net of an allowance of $35,000 at December 31, 2024. Only collateral-dependent IAL with a related specific ACL or a partial charge off are included in IAL for purposes of fair value disclosures. IAL below are presented net of specific allowances of $2,740,000 and $821,000 at December 31, 2025 and 2024, respectively.

Fair Value of Financial Instruments

FASB ASC Topic 825, "Financial Instruments," requires disclosures of fair value information about financial instruments, whether or not recognized in the balance sheet, if the fair values can be reasonably determined. Fair value is best determined based upon quoted market prices. However, in many instances, there are no quoted market prices for the Company's various financial instruments. In cases where quoted market prices are not available, fair values are based on estimates using present value or other valuation techniques using observable inputs when available. Those techniques are significantly affected by the assumptions used, including the discount rate and estimates of future cash flows. Accordingly, the fair value estimates may not be realized in an immediate settlement of the instrument. FASB ASC Topic 825 excludes certain financial instruments and all nonfinancial instruments from its disclosure requirements. Accordingly, the aggregate fair value amounts presented may not necessarily represent the underlying fair value of the Company.

This summary excludes financial assets and liabilities for which carrying value approximates fair values and financial instruments that are recorded at fair value on a recurring basis. Financial instruments for which carrying values approximate fair value include cash equivalents, interest-bearing deposits in other banks, demand, NOW, savings and money market deposits. The estimated fair value of demand, NOW, savings and money market deposits is the amount payable on demand at the reporting date. Carrying value is used because the accounts have no stated maturity and the customer has the ability to withdraw funds immediately.

The First Bancorp - 2025 Form 10-K - Page 103

The carrying amounts and estimated fair values for financial instruments as of December 31, 2025 were as follows:

The First Bancorp - 2025 Form 10-K - Page 104

The carrying amounts and estimated fair values for financial instruments as of December 31, 2024 were as follows:

Note 21. Other Operating Income and Expense

There were no items within Other Operating Income that totaled more than 1% of revenues. Other operating expense includes the

following items greater than 1% of revenues:

Note 22. Legal Contingencies

Various legal claims also arise from time to time in the normal course of business which, in the opinion of Management, will have no material effect on the Company's consolidated financial statements.

Note 23. Reclassifications

Certain items from prior years were reclassified in the financial statements to conform with the current year presentation. These do not have a material impact on the balance sheet or statement of income presentations.

The First Bancorp - 2025 Form 10-K - Page 105

Note 24. Condensed Financial Information of Parent

Condensed financial information for The First Bancorp, Inc. exclusive of its subsidiary is as follows:

Balance Sheets

The First Bancorp - 2025 Form 10-K - Page 106

Statements of Income

Statements of Cash Flows

The First Bancorp - 2025 Form 10-K - Page 107

Note 25. New Accounting Pronouncements

In December 2023 the FASB issued ASU 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures. This ASU requires public business entities, such as the Company, to provide enhanced disclosures on the amount of income taxes paid disaggregated by type and jurisdiction. Adoption is required for annual periods beginning after December 15, 2024 and has not had a material impact on the Company's consolidated financial statements.

In November 2024 the FASB issued ASU 2024-03, Income Statement – Reporting Comprehensive Income – Expense Disaggregation Disclosures (Subtopic 220-40): Disaggregation of Income Statement Expenses (ASU 2024-03). Under ASU 2024-03, public business entities, such as the Company, are required to disclose in the notes to their financial statements disaggregated information about certain costs and expenses in both annual and interim filings. ASU 2024-03 is effective for calendar year-end public business entities beginning in calendar year 2027, and is not expected to have a material impact on the Company's consolidated financial statements.

In November 2025 the FASB issued ASU 2025-08, Financials Instruments - Credit Losses (Topic 326): Purchased Loans. The ASU expands the use of the gross-up approach to include purchased seasoned loans, defined as loans (excluding credit cards) acquired without significant credit deterioration and deemed to be seasoned; seasoned loans are those obtained either through a business combination or purchase at least ninety days after origination, provided the acquirer was not involved in the origination. The change is intended to reduce complexity and subjectivity in loan purchase transactions, and to reduce the risk of double counting expected credit losses that are already reflected in fair value determinations made at the time of acquisition. ASU 2025-08 is effective for reporting periods beginning after December 15, 2026; early adoption is permitted. Adoption is not expected to have a material impact on the Company's consolidated financial statements.

The First Bancorp - 2025 Form 10-K - Page 108

Note 26. Quarterly Information

The following tables provide unaudited financial information by quarter for each of the past two years:

The First Bancorp - 2025 Form 10-K - Page 109

Note 27. Acquisitions and Intangible Assets

On December 11, 2020, the Company acquired a branch at 1B Belmont Avenue, Belfast, Maine from Bangor Savings Bank. The acquisition added to its existing book of business in Belfast and Waldo County. The Company has leveraged having a physical presence in Belfast and the base of new customers to grow its loan and deposit share in the market. There wereno acquisitions in 2024 or 2025.

The core deposit intangible related to the FNB Bankshares acquisition was fully amortized in 2015. The core deposit intangible related to the Rockland branch acquisition was fully amortized in 2022. The core deposit intangible related to the Belfast branch acquisition is being amortized on a straight-line basis overten years. Annual amortization expense for 2025 and 2024 was $26,000, and the amortization expense for each year until fully amortized (presently expected to be 2031) will be $26,000. The Belfast core deposit intangible is being amortized on a straight-line basis as the Company does not expect significant run off in the core deposits.

The First Bancorp - 2025 Form 10-K - Page 110

The Shareholders and Board of Directors

Opinions on the Financial Statements and Internal Control over Financial Reporting

We have audited the accompanying consolidated balance sheet of The First Bancorp, Inc. and Subsidiary (the Company) as of December 31, 2025, and the related consolidated statements of income and comprehensive income, changes in shareholders’ equity, and cash flows for each of the year then ended, and the related notes (collectively referred to as the financial statements). We also have audited the Company’s internal control over financial reporting as of December 31, 2025, based on criteria established in Internal Control—Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO).

In our opinion, the financial statements referred to above present fairly, in all material respects, the financial position of the Company as of December 31, 2025, and the results of their operations and their cash flows for the year then ended, in conformity with U.S generally accepted accounting principles. Also, in our opinion, the Company maintained, in all material respects, effective internal control over financial reporting as of December 31, 2025, based on criteria established in Internal Control—Integrated Framework (2013) issued by COSO.

The consolidated financial statements of the Company as of December 31, 2024, and for the years ended December 31, 2024 and 2023, along with the Company’s internal control over financial reporting as of December 31, 2024, were audited by other auditors whose report dated March 7, 2025, expressed an unqualified opinion on those statements.

Basis for Opinion

The Company’s management is responsible for these financial statements, for maintaining effective internal control over financial reporting, and for its assessment of the effectiveness of internal control over financial reporting included in the accompanying Management’s Annual Report on Internal Control over Financial Reporting. Our responsibility is to express an opinion on the Company’s financial statements and an opinion on the Company’s internal control over financial reporting 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 the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audit 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, and whether effective internal control over financial reporting was maintained in all material respects.

Our audit of the financial statements 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 audit also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. Our audit of internal control over financial reporting included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, and testing and evaluating the design and operating effectiveness of internal control based on the assessed risk. Our audit also included performing such other procedures as we considered necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinion.

Critical Audit Matter

The critical audit matter communicated below is a matter arising from the current period audit of the consolidated financial statements that was communicated or required to be communicated to the audit committee and that: (1) relates to accounts or disclosures that are material to the consolidated financial statements and (2) involved our especially challenging, subjective or complex judgments. The communication of the critical audit matter does not alter in any way our opinion on the consolidated financial statements, taken as a whole, and we are not, by communicating the critical audit matter below, providing a separate opinion on the critical audit matter or on the accounts or disclosures to which it relates.

Allowance for Credit Losses on Loans and Off-Balance Sheet Credit Exposures

As described in Notes 5 and 6 to the Company's consolidated financial statements, the Company has a gross loan portfolio of $2,394,109,000, related allowance for credit losses of $25,365,000, off-balance credit exposures of $129,566,000, and related allowance for credit losses on off-balance sheet exposures of$565,000 as of December 31, 2025. The Company's allowance for credit losses on loans and off-balance sheet credit exposures are material and complex estimates requiring significant management judgment in the evaluation of the credit quality and the estimation of inherent losses within the loan portfolio and off-balance sheet credit exposures.

The allowance for credit losses on loans represents the Company’s estimate of expected credit losses over the expected life of the loans at the balance sheet date. The allowance for credit losses on loans is comprised of reserves measured on a collective (pool) basis based on a lifetime loss-rate model when similar risk characteristics exist. Loans that do not share risk characteristics are evaluated on an individual basis.

For reserves measured on a collective (pool) basis, the Company uses the discounted cash flow method to estimate expected credit losses for all loan pools. For each of the loan segments, the Company generates cash flow projections at the instrument level wherein payment expectations are adjusted for estimated prepayment speed, curtailments, time to recovery, and loss rates. The modeling of expected prepayment speeds, curtailment rates, and time to recovery are based on historical benchmark data. The Company uses regression analysis of historical internal and peer data to determine suitable loss drivers to utilize when modeling lifetime loss rates.

The Company also incorporates a reasonable and supportable forecast period, which reverts back to a historical loss rate. The combination of adjustments for credit expectations (default and loss) and timing expectations (prepayment, curtailment, and time to recovery) produces an expected cash flow stream at the instrument level that represents the sum of expected losses to determine the estimated allowance for credit losses on loans. The allowance for credit losses on loans evaluation also considers various qualitative factors, including changes in policy and/or underwriting standards, actual or expected changes in economic trends and conditions, changes in the nature and volume of the

The First Bancorp - 2025 Form 10-K - Page 111 portfolio, changes in credit and lending staff/administration, problem loan trends, credit risk concentrations, loan review results, changes in the value of underlying collateral for loans, and changes in the regulatory and business environment.

The allowance for credit losses on off-balance sheet credit exposures represents the estimate of probable credit losses inherent in unfunded commitments to extend credit as of the balance sheet date. Unfunded commitments to extend credit include unused portions of lines of credit, commitments to originate loans and standby and commercial letters of credit. The process used to determine the allowance for credit losses for these exposures is consistent with the process for determining the allowance for credit losses on loans, as adjusted for estimated funding probabilities.

Changes in these judgments and assumptions could have a material effect on the Company’s financial results. Auditing these complex judgments and assumptions involves especially challenging auditor judgment due to the nature and extent of audit evidence and effort required to address these matters, including the extent of specialized skill or knowledge needed. The primary procedures we performed to address this critical audit matter included:

•Obtaining an understanding of the relevant controls related to the allowance for credit losses on loans and tested such controls for design and operating effectiveness, including those over approval of key data inputs including forecasted economic scenarios, loss drivers and qualitative factors including validation of underlying data.

•Evaluating the reasonableness of judgments, assumptions, and sources of data used by management in forming its expected cash flow streams by analyzing data used in developing the judgments and assumptions, including assessment of whether there were additional sources of data relevant to the loan portfolio not used by management.

•Comparing the judgments and assumptions documented by management to the allowance for credit loss model for consistency.

•Evaluating the appropriateness of inputs and factors that the Company used in forming the qualitative loss factors and assessing whether such inputs and factors were relevant, reliable, and reasonable for the purpose used.

•Evaluating the appropriateness of inputs and factors that the Company used in forming the qualitative loss factors and assessing whether such inputs and factors were relevant, reliable, and reasonable for the purpose used.

•Evaluating the appropriateness of specific reserves for individually analyzed loans.

•Verifying the mathematical accuracy and computation of the allowance for credit losses on loans and off-balance sheet credit exposures by re-performing or independently calculating significant elements of the allowance for credit losses on loans and off-balance sheet credit exposures based on relevant source documents.

Definition and Limitations of Internal Control over Financial Reporting

A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company’s internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s assets that could have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

We have served as the Company’s auditor since 2025.

/s/BDMP Assurance, LLP

Firm ID 136

Portland, Maine

March 6, 2026

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