Origin Bancorp Inc

Report of Independent Registered Public Accounting Firm

Shareholders, Board of Directors, and Audit Committee

Opinion on the Consolidated Financial Statements

We have audited the accompanying consolidated balance sheets of Origin Bancorp, Inc. (Company) as of December 31, 2024 and 2023, the related consolidated statements of income, comprehensive income (loss), changes in stockholders’ equity, and cash flows for each of the years in the three-year period ended December 31, 2024, and the related notes (collectively referred to as the “financial statements”). In our opinion, the consolidated financial statements referred to above 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 years in the three-year period ended December 31, 2024 in conformity with accounting principles generally accepted in the United States of America.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the Company’s internal control over financial reporting as of December 31, 2024, based on criteria established in Internal Control – Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission, and our report dated February 27, 2025 expressed an unqualified opinion thereon.

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 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 audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audits to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud.

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 include 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 Matter

The critical audit matter communicated below arise from the current-period audit of the financial statements that was communicated or required to be communicated to the audit committee and that: (1) relate to accounts or disclosures that are material to the financial statements and (2) involved our especially challenging, subjective, or complex judgments. The communication of critical audit matters 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 a separate opinion on the critical audit matter or on the accounts or disclosures to which it relates.

Allowance for Credit Losses

The Company’s loan portfolio totaled $7.57 billion as of December 31, 2024, and the allowance for credit losses on loans was $91.1 million.

As more fully described in Notes 1 and 4 to the Company’s consolidated financial statements, the Company estimates its exposure to expected credit losses as of the balance sheet date, for existing loans held for investment.

The determination of the ACL requires management to exercise significant judgment and consider numerous subjective factors, including determining qualitative factors utilized to adjust historical loss rates, loan credit risk grading, and identifying loans requiring individual evaluation among others. As disclosed by management, different assumptions and conditions could result in a materially different amount for the estimate of the ACL.

We identified the identification and valuation of the qualitative factors within the ACL at December 31, 2024 as a critical audit matter. Auditing the qualitative factors involved a high degree of judgment and subjectivity in evaluating management's assessment of economic conditions and other portfolio and environmental factors.

The primary procedures we performed as of December 31, 2024 to address this critical audit matter included:

•Obtained an understanding of the Company’s process for establishing the qualitative factors

•Tested the design and operating effectiveness of controls over the establishment of qualitative factors in the allowance for loan credit losses

•Evaluated the completeness and accuracy and the relevance of the key data used as inputs in the qualitative factor adjustment process

•Evaluated the qualitative adjustments to the ACL, including assessing the basis for adjustments and the reasonableness of the significant assumptions

•Evaluated credit quality trends in delinquencies, non-accruals, charge-offs, and loan risk ratings

/s/Forvis Mazars, LLP

We have served as the Company’s auditor since 2016.

Little Rock, Arkansas

February 27, 2025