PATRIOT NATIONAL BANCORP INC

Report of Independent Registered Public Accounting Firm

To the Shareholders and the Board of Directors of Patriot National Bancorp, Inc.

Opinion on the Financial Statements

We have audited the accompanying consolidated balance sheets of Patriot National Bancorp, Inc. and its subsidiaries (the Company) as of December 31, 2024 and 2023, the related consolidated statements of operations, comprehensive loss, shareholders’ equity and cash flows for each of the three years in the period ended December 31, 2024, and the related notes to the consolidated financial statements (collectively, the financial statements). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 2024 and 2023, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2024, in conformity with accounting principles generally accepted in the United States of America.

Basis for Opinion

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

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

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

Critical Audit Matters

The critical audit matter communicated below is a matter arising from the current period audit of the 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 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 financial statements, taken as a whole, and we are not, by communicating the critical audit matter below, providing separate opinions on the critical audit matter or on the accounts or disclosures to which it relates.

Allowance for Credit Losses for Loans

As described in Notes 1 and 4 of the consolidated financial statements, the Company’s allowance for credit losses (allowance) totaled $7.3 million as of December 31, 2024. The recorded allowance was established based on an allowance of $6.8 million related to loans collectively evaluated and on an allowance of $0.5 million relating to loans individually evaluated as of December 31, 2024.

For loans that are collectively evaluated, the Company analyzes loans with similar risk characteristics in pools and uses a model and methodology that forecasts the probability of default (PD), loss given default (LGD), and exposure at default (EAD) for loans in a given pool over their remaining life, thereby deriving an allowance capable of absorbing estimated losses over the remaining life of the portfolio. For all loan segments collectively evaluated, losses are predicted over a period of time determined to be reasonable and supportable, and at the end of the reasonable and supportable forecast period losses are reverted to long-term historical averages. The reasonable and supportable forecasts used in the model are influenced by changes in real Gross Domestic Product ("GDP"), State of Connecticut unemployment rate, New York Fed recession indicator, CoStar composite index, New York Case Schiller index, Coincident activity index, Michigan consumer activity index, S&P's BBB credit spreads, and the Company's loan delinquencies and charge off data.

The PD model employs a quarterly risk-rating transition method to estimate the probability of default by simulating loan downgrades and assigning increasing default probabilities to each loan. This captures the likelihood that borrowers will be unable to repay their loans according to the original terms. The LGD calculation considers characteristics such as collateral value and vintage, underlying collateral characteristics (e.g., commercial real estate vs. residential, owner-occupied vs. investment), a floor for the LGD calculation (minimum loss in event of default regardless of collateral protection), and other relevant underwriting characteristics. Also calculated is the exposure at default. The probability of default is multiplied by the loss given default and the exposure at default. This calculation is forecasted for every year remaining in the life of each loan, and the results are aggregated to determine the necessary level of ACL for the pooled loans. Forecasted exposure at default can be influenced by prepayments speeds.

An additional component of the allowance is determined by management based on a qualitative analysis of certain factors related to portfolio risks that are not incorporated in the calculated model. The factors include lending practices, the ability and experience of the credit staff, the overall lending environment and external factors such as the regulatory environment and competition.

Credit losses for loans that do not share similar risk characteristics with the collectively evaluated pools are excluded from the collective evaluation and estimated on an individual basis (individually evaluated loans). Individual evaluations are performed for nonaccrual loans and loans rated substandard that are in excess of $100,000. Specific allowances were estimated based on one of several methods, including the estimated fair value of the underlying collateral, observable market value of similar debt or the present value of expected cash flows.

We identified the assessment of certain inputs and assumptions used in the allowance for collectively evaluated loans as a critical audit matter because auditing certain underlying assumptions involved a high degree of complexity and auditor judgment given the high degree of subjectivity exercised by management. Specifically, our assessment encompassed the evaluation of management’s determination of reasonable and supportable forecasts, prepayment speeds, the LGD floor, and qualitative factors applied to the quantitative model. In addition, auditor judgment was required to evaluate the sufficiency of audit evidence obtained.

Our audit procedures related to management’s determination of reasonable and supportable forecasts, prepayment speeds, the LGD floor, and qualitative factors applied to the quantitative model included the following:

-We obtained an understanding and tested the relevant controls for design and operating effectiveness related to management’s determination of reasonable and supportable forecasts, prepayment speeds, the LGD floor, and qualitative factors applied to the quantitative model.

-We tested the completeness and accuracy of data used by management in determining the selection and weighting of reasonable and supportable economic forecast scenarios by agreeing on a sample basis the underlying data and components to their appropriate internal or external sources.

-We evaluated the completeness and accuracy of data and assessed assumptions used by management in determining the prepayment speeds used in its calculation of PD and LGD by agreeing the underlying data to internal sources.

-We evaluated the completeness and accuracy of data and assessed assumptions used by management in determining the application of a minimum LGD floor in the calculation of LGD by agreeing the underlying data to internal and external sources.

-We tested the completeness and accuracy of data used by management in determining the qualitative factor adjustments to the quantitative model by agreeing the underlying data to appropriate internal and external sources.

-We evaluated management’s determination of the magnitude and extent of qualitative factors applied to the model for reasonableness in relation to the underlying data tested.

/s/RSM US LLP

We have served as the Company’s auditor since 2017.

Hartford, Connecticut

April 15, 2025