Nature of Business — Wilson Bank Holding Company (the “Company”) is a bank holding company whose primary business is conducted by its wholly-owned subsidiary, Wilson Bank & Trust (the “Bank”). The Bank is a commercial bank headquartered in Lebanon, Tennessee. The Bank provides a full range of banking services in its primary market areas of Wilson, Davidson, Rutherford, Trousdale, Sumner, Dekalb, Putnam, Smith, Hamilton, and Williamson Counties, Tennessee. The Bank was previously invested in Encompass Home Lending LLC ("Encompass"), a joint venture of which the Bank owned 51% of the outstanding membership interests. Effective June 1, 2025, the Bank sold its 51% membership interest in Encompass to Encompass Home Lending Investors, LLC, which owned 49% of the outstanding membership interests in Encompass prior to the sale. Encompass offers residential mortgage banking services to customers of certain home builders in the Bank's markets as well as other mortgage customers.

Basis of Presentation — The accompanying unaudited, consolidated financial statements have been prepared in accordance with the instructions to Form 10-Q and therefore do not include all information and footnotes necessary for a fair presentation of financial position, results of operations, and cash flows in conformity with U.S. generally accepted accounting principles. All adjustments consisting of normally recurring accruals that, in the opinion of management, are necessary for a fair presentation of the financial position and results of operations for the periods covered by the report have been included. The accompanying unaudited consolidated financial statements should be read in conjunction with the Company’s consolidated audited financial statements and related notes appearing in the Company's Annual Report on Form 10-K for the year ended December 31, 2024 filed with the Securities and Exchange Commission (the "SEC") on February 28, 2025 (the "2024 Form 10-K").

These unaudited consolidated financial statements include the accounts of the Company, the Bank, and through the period of the Company's investment, Encompass. Significant intercompany transactions and accounts are eliminated in consolidation.

Use of Estimates — The preparation of financial statements in conformity with U.S. generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities as of the balance sheet date and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Material estimates that are particularly susceptible to significant change in the near term include the determination of the allowance for credit losses, the valuation of deferred tax assets, determination of any impairment of goodwill or other intangibles, the valuation of other real estate (if any), and the fair value of financial instruments. These financial statements should be read in conjunction with the 2024 Form 10-K. There have been no significant changes to the Company’s significant accounting policies as disclosed in the 2024 Form 10-K.

Newly Issued Not Yet Effective Accounting Standards

Information about certain recently issued accounting standards updates is presented below. Also refer to Note 1 - Accounting Standards Updates in the 2024 Form 10-K for additional information related to previously issued accounting standards updates.

Accounting Standards Update ("ASU") 2024-03, Income Statement – Reporting Comprehensive Income – Expense Disaggregation Disclosures (Subtopic 220-40), in November 2024, the Financial Accounting Standards Board ("FASB") issued this pronouncement which requires public entities to disclose additional information about specific expense categories in the notes to the financial statements. The guidance (as further clarified through ASU 2025-01, Income Statement – Reporting Comprehensive Income – Expense Disaggregation Disclosures (Subtopic 220-40)) is effective for public business entities for fiscal years beginning after December 15, 2026, and interim reporting periods beginning after December 15, 2027. Early adoption is permitted. The Company is assessing ASU 2024-03 and its impact on its consolidated financial statements and accompanying notes.

Recently Adopted Accounting Standards

ASU 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting. In March 2020, the FASB issued this pronouncement and has issued subsequent amendments thereto, which provides temporary optional guidance to ease the potential burden in accounting for reference rate reform. The ASU provides optional expedients and exceptions for applying generally accepted accounting principles to contract modifications and hedging relationships, subject to meeting certain criteria, that reference London Interbank Offered Rate ("LIBOR") or another reference rate expected to be discontinued. It is intended to help stakeholders during the global market-wide reference rate transition period. The guidance was effective for all entities as of March 12, 2020 through December 31, 2022. In December 2022, the FASB issued an update to Accounting Standards Update 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting with Accounting Standards Update 2022-06, Reference Rate Reform (Topic 848): Deferral of the Sunset Date of Topic 848, which updated the effective date to be March 12, 2020 through December 31, 2024. The Company implemented a transition plan to identify and modify its loans

and other financial instruments, including certain indebtedness, with attributes that are either directly or indirectly influenced by LIBOR. The Company has moved all of its LIBOR-based loans to its preferred replacement index, a Secured Overnight Financing Rate ("SOFR") based index as of June 30, 2025.

ASU 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures, in November 2023, the FASB issued this pronouncement which requires public entities to provide disclosures of significant segment expenses and other segment items on an annual and interim basis and to provide in interim periods all disclosures about a reportable segment's profit or loss and assets that are currently required annually. The ASU requires a public entity to disclose, for each reportable segment, the significant expense categories and amounts that are regularly provided to the chief operating decision-maker ("CODM") and included in each reported measure of a segment's profit or loss. ASU 2023-07 also requires disclosure of the title and position of the CODM and an explanation of how the CODM uses the reported measure(s) of segment profit or loss in assessing segment performance and deciding how to allocate resources. ASU 2023-07 is effective for fiscal years beginning after December 15, 2023, and for interim periods beginning after December 15, 2024. The guidance is applied retrospectively to all periods presented in the financial statements unless it is impracticable. The adoption of ASU 2023-07 did not have a significant impact on the Company's financial statements.

ASU 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures, in December 2023, the FASB issued this pronouncement which amends the guidance for income tax disclosures to include certain required disclosures related to tax rate reconciliations, including certain categories of expense requiring disclosure, income taxes paid, including disclosure of taxes paid disaggregated by nation, state, and foreign taxes, and other disclosures for disaggregation of income before income tax expense (or benefit) and income tax expense (or benefit) by domestic and foreign allocation. The guidance is effective for public business entities for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2024. The Company has adopted ASU 2023-09 and does not expect any major impact on reporting.

Other than those previously discussed, there were no other recently issued accounting pronouncements that are expected to materially impact the Company.