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SOUTHSIDE BANCSHARES INC

For the period ended Dec 31, 2025. Filed Feb 27, 2026.

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A company's yearly report to the SEC, with audited financial statements. It is the fullest account a company gives of its business, its finances and the risks it sees.

FY2025 · Filed Feb 27, 2026

SBSI$35.09+0.0%Stored close · as of Nov 10, 2026

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Report of Independent Registered Public Accounting Firm

To the Shareholders and the Board of Directors of Southside Bancshares, Inc.

Opinion on the Financial Statements

We have audited the accompanying consolidated balance sheets of Southside Bancshares, Inc. and subsidiaries (the Company) as of December 31, 2025 and 2024, the related consolidated statements of income, comprehensive income (loss), changes in shareholders’ equity and cash flows for each of the three years in the period ended December 31, 2025, and the related notes (collectively referred to as the “consolidated financial statements”). In our opinion, the consolidated financial statements present fairly, in all material respects, the financial position of the Company at December 31, 2025 and 2024, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2025, in conformity with U.S. generally accepted accounting principles.

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, 2025, based on criteria established in Internal Control—Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (2013 framework), and our report dated February 27, 2026, 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 audit 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 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 Matter

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 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 account or disclosures to which it relates.

Allowance for Loan Losses
Description of the MatterThe Company’s loan portfolio totaled $4.8 billion as of December 31, 2025, and the allowance for loan losses (ALL) was $45.1 million. As discussed in Note 1 and Note 5 to the consolidated financial statements, the ALL is an amount which represents management’s estimate of credit losses over the expected life of the loans. The ALL is estimated based on historical and expected credit loss patterns within reasonable and supportable forecast periods. Management applies judgement in the assignment of probabilities to economic scenarios included within the modeled forecast periods to estimate the ALL.Auditing management’s estimate of the ALL involved a high degree of subjectivity due to the judgement involved in management’s determination of the probabilities assigned to the economic scenarios utilized within the reasonable and supportable forecast periods to estimate the future credit losses within the loan portfolio. Management’s evaluation of the future economic conditions could have a significant impact on the ALL.
How We Addressed the Matter in Our AuditOur considerations and procedures performed were reflective of the ALL process for the year and included, but was not limited to, the evaluation of the process utilized by management to challenge the model results and determine the best estimate of the ALL as of the balance sheet date. We obtained an understanding of the Company’s process for establishing the ALL, including determination of the probabilities assigned to the economic scenarios utilized within the reasonable and supportable forecast periods. We evaluated the design and tested the operating effectiveness of the controls associated with the ALL process, including controls over the reliability and accuracy of data used in the model, management’s review and approval of the probabilities assigned to the economic scenarios utilized within the reasonable and supportable forecast periods, the governance of the credit loss methodology, and management’s review and approval of the ALL.We tested the completeness and accuracy of data used by the Company within the model to estimate the ALL and involved an internal specialist to assess the conceptual soundness of the model. We tested the probabilities assigned to the economic scenarios utilized within the model for the reasonable and supportable forecast periods and assessed the reasonableness of economic scenarios by comparison of key assumptions to external sources. In addition, we evaluated the Company’s estimate of the overall ALL, considering the Company’s loan portfolio and macroeconomic trends, compared such information to comparable financial institutions and considered whether new or contrary information existed.

/s/Ernst & Young LLP

We have served as the Company’s auditor since 2012.

Dallas, Texas

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