Note 1 - Summary of Significant Accounting Policies	6 Months Ended
Jun. 30, 2026
Notes to Financial Statements
Significant Accounting Policies [Text Block]	NOTE 1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Nature of Operations The Company is a financial holding company, headquartered in Baton Rouge, Louisiana that provides full banking services, excluding trust services, through its wholly-owned banking subsidiary, Investar Bank, National Association, a national bank, primarily to meet the needs of individuals, professionals and small to medium-sized businesses. The Company’s primary markets are in south Louisiana, Texas and Alabama. At June 30, 2026, the Company operated 20 full service branches located in Louisiana, ten full service branches located in Texas and six full service branches located in Alabama and had 421 full-time equivalent employees. Basis of Presentation The accompanying unaudited consolidated financial statements of the Company have been prepared in accordance with GAAP for interim financial information and the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include information or footnotes necessary for a complete presentation of financial position, results of operations, and cash flows in conformity with GAAP. However, in the opinion of management, all adjustments (consisting of normal recurring adjustments) necessary for a fair statement of the financial statements have been included. The results of operations for the three and six month periods ended June 30, 2026 are not necessarily indicative of the results that may be expected for the entire fiscal year. These statements should be read in conjunction with the Company’s audited consolidated financial statements for the year ended December 31, 2025, including the notes thereto, which were included as part of the Company’s Annual Report. Prior period consolidated financial statements are reclassified whenever necessary to conform to the current period presentation. No reclassifications of prior period balances were material to the consolidated financial statements. Principles of Consolidation The consolidated financial statements include the accounts of the Company and its wholly-owned subsidiary, the Bank. All significant intercompany accounts and transactions have been eliminated in consolidation. Segment Reporting The Company determined that all of its banking operations serve a similar customer base, offer similar products and services, and are managed through similar processes. Therefore, the Company’s banking operations are aggregated into one reportable operating segment, which generates income principally from interest on loans and, to a lesser extent, securities investments, as well as from fees charged in connection with various loan and deposit services. The CODM is the Chief Executive Officer, who for the purposes of assessing performance, making operating decisions, and allocating Company resources, regularly reviews net income as reported in the accompanying consolidated statements of income. The level of disaggregation and amounts of significant segment income and expenses that are regularly provided to the CODM are the same as those presented in the accompanying consolidated statements of income. Likewise, the measure of segment assets is reported on the accompanying consolidated balance sheets as total assets. Use of Estimates The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the financial statements as well as the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates, and such differences could be material. Material estimates that are particularly susceptible to significant change relate to the determination of the ACL. While management uses available information to recognize credit losses on loans, future additions to the allowance may be necessary based on changes in economic conditions, changes in conditions of borrowers’ industries or changes in the condition of individual borrowers. Because of these factors, it is reasonably possible that the ACL may change materially in the near term. However, the amount of change that is reasonably possible cannot be estimated. Other estimates that are susceptible to significant change in the near term relate to the allowance for off-balance sheet credit losses, the fair value of stock-based compensation awards, the determination of an ACL for investment securities, and the fair value of financial instruments and goodwill. A changing interest rate environment, elevated levels of inflation and changing U.S. trade and tariff policies have made certain estimates more challenging, including those discussed above. INVESTAR HOLDING CORPORATION NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS (Unaudited) Accounting Standards Adopted in 2026 FASB ASC Topic 326 “Financial Instruments - Credit Losses (Topic 326): Purchased Loans.” Update No. 2025-08 (“ASU 2025-08”). In November 2025, the FASB issued ASU 2025-08, which expands the scope of the “gross‑up” method, formerly applicable only to PCD assets, to include acquired non‑PCD loans that meet certain criteria, now referred to as PSLs. Under this model, an ACL is recognized at acquisition, offsetting the loan’s amortized cost basis, thereby eliminating the day-one provision expense previously required for non‑PCD assets. PSLs are defined as non‑PCD loans acquired either (i) through a business combination, or (ii) purchased more than 90 days after origination when the acquirer was not involved in origination. ASU 2025-08 is effective for annual reporting periods beginning after December 15, 2026, including interim reporting periods, and must be applied prospectively. Early adoption is permitted in interim or annual reporting periods in which financial statements have not yet been issued. An entity that adopts the amendments in an interim reporting period may apply them as of the beginning of that interim reporting period or the beginning of the annual reporting period that includes that interim reporting period. The Company early adopted ASU 2025-08 for the annual reporting period beginning on January 1, 2026. On January 1, 2026, for PSLs acquired from WFB, the Company established an ACL of $11.6 million and recorded it as part of their initial amortized cost. For additional information, see Note 2. Business Combinations and Note 5. Loans and Allowance for Credit Losses. Recent Accounting Pronouncements FASB ASC Topic 220 “Income Statement - Reporting Comprehensive Income - Expense Disaggregation Disclosures: Disaggregation of Income Statement Expenses” Update No. 2024-03 (“ASU 2024-03”). In November 2024, the FASB issued ASU 2024-03, which requires disaggregated disclosure of income statement expenses in a tabular format in the notes of the financial statements for public business entities. ASU 2024-03 is effective on a prospective basis for fiscal years beginning after December 15, 2026 and interim periods within fiscal years beginning after December 15, 2027, with early adoption and retrospective application permitted. ASU 2024-03 is not expected to have a significant impact on our financial statements. FASB ASC Topic 815 “Derivatives and Hedging (Topic 815): Hedge Accounting Improvements.” Update No. 2025-09 (“ASU 2025-09”). In November 2025, the FASB issued ASU 2025-09, which aligns hedge accounting more closely with an entity’s economic risk management practices. Key amendments include (i) to allow designating a variable price component of a nonfinancial forecasted purchase or sale as the hedged risk, (ii) to allow grouping individual forecasted transactions with similar (not identical) risk exposures, (iii) a new model for hedging forecasted interest on variable-rate debt, enabling changes in index or tenor without dedesignation, subject to simplifying assumptions, and (iv) additional clarifications related to hedge accounting of nonfinancial components, net written options, and dual-hedge strategies. ASU 2025-09 is effective on a prospective basis for annual reporting periods beginning after December 15, 2026. Early adoption is permitted. ASU 2025-09 is not expected to have a significant impact on our financial statements. INVESTAR HOLDING CORPORATION NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS (Unaudited)

The Company is a financial holding company, headquartered in Baton Rouge, Louisiana that provides full banking services, excluding trust services, through its wholly-owned banking subsidiary, Investar Bank, National Association, a national bank, primarily to meet the needs of individuals, professionals and small to medium-sized businesses. The Company’s primary markets are in south Louisiana, Texas and Alabama. At June 30, 2026, the Company operated 20 full service branches located in Louisiana, ten full service branches located in Texas and six full service branches located in Alabama and had 421 full-time equivalent employees.

The accompanying unaudited consolidated financial statements of the Company have been prepared in accordance with GAAP for interim financial information and the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include information or footnotes necessary for a complete presentation of financial position, results of operations, and cash flows in conformity with GAAP. However, in the opinion of management, all adjustments (consisting of normal recurring adjustments) necessary for a fair statement of the financial statements have been included. The results of operations for the three and six month periods ended June 30, 2026 are not necessarily indicative of the results that may be expected for the entire fiscal year. These statements should be read in conjunction with the Company’s audited consolidated financial statements for the year ended December 31, 2025, including the notes thereto, which were included as part of the Company’s Annual Report.

Prior period consolidated financial statements are reclassified whenever necessary to conform to the current period presentation. No reclassifications of prior period balances were material to the consolidated financial statements.

Principles of Consolidation

The consolidated financial statements include the accounts of the Company and its wholly-owned subsidiary, the Bank. All significant intercompany accounts and transactions have been eliminated in consolidation.

The Company determined that all of its banking operations serve a similar customer base, offer similar products and services, and are managed through similar processes. Therefore, the Company’s banking operations are aggregated into one reportable operating segment, which generates income principally from interest on loans and, to a lesser extent, securities investments, as well as from fees charged in connection with various loan and deposit services. The CODM is the Chief Executive Officer, who for the purposes of assessing performance, making operating decisions, and allocating Company resources, regularly reviews net income as reported in the accompanying consolidated statements of income. The level of disaggregation and amounts of significant segment income and expenses that are regularly provided to the CODM are the same as those presented in the accompanying consolidated statements of income. Likewise, the measure of segment assets is reported on the accompanying consolidated balance sheets as total assets.

The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the financial statements as well as the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates, and such differences could be material.

Material estimates that are particularly susceptible to significant change relate to the determination of the ACL. While management uses available information to recognize credit losses on loans, future additions to the allowance may be necessary based on changes in economic conditions, changes in conditions of borrowers’ industries or changes in the condition of individual borrowers. Because of these factors, it is reasonably possible that the ACL may change materially in the near term. However, the amount of change that is reasonably possible cannot be estimated.

Other estimates that are susceptible to significant change in the near term relate to the allowance for off-balance sheet credit losses, the fair value of stock-based compensation awards, the determination of an ACL for investment securities, and the fair value of financial instruments and goodwill.

A changing interest rate environment, elevated levels of inflation and changing U.S. trade and tariff policies have made certain estimates more challenging, including those discussed above.

FASB ASC Topic 326 “Financial Instruments - Credit Losses (Topic 326): Purchased Loans.” Update No. 2025-08 (“ASU 2025-08”). In November 2025, the FASB issued ASU 2025-08, which expands the scope of the “gross‑up” method, formerly applicable only to PCD assets, to include acquired non‑PCD loans that meet certain criteria, now referred to as PSLs. Under this model, an ACL is recognized at acquisition, offsetting the loan’s amortized cost basis, thereby eliminating the day-one provision expense previously required for non‑PCD assets. PSLs are defined as non‑PCD loans acquired either (i) through a business combination, or (ii) purchased more than 90 days after origination when the acquirer was not involved in origination. ASU 2025-08 is effective for annual reporting periods beginning after December 15, 2026, including interim reporting periods, and must be applied prospectively. Early adoption is permitted in interim or annual reporting periods in which financial statements have not yet been issued. An entity that adopts the amendments in an interim reporting period may apply them as of the beginning of that interim reporting period or the beginning of the annual reporting period that includes that interim reporting period. The Company early adopted ASU 2025-08 for the annual reporting period beginning on January 1, 2026. On January 1, 2026, for PSLs acquired from WFB, the Company established an ACL of $11.6 million and recorded it as part of their initial amortized cost. For additional information, see Note 2. Business Combinations and Note 5. Loans and Allowance for Credit Losses.

FASB ASC Topic 220 “Income Statement - Reporting Comprehensive Income - Expense Disaggregation Disclosures: Disaggregation of Income Statement Expenses” Update No. 2024-03 (“ASU 2024-03”). In November 2024, the FASB issued ASU 2024-03, which requires disaggregated disclosure of income statement expenses in a tabular format in the notes of the financial statements for public business entities. ASU 2024-03 is effective on a prospective basis for fiscal years beginning after December 15, 2026 and interim periods within fiscal years beginning after December 15, 2027, with early adoption and retrospective application permitted. ASU 2024-03 is not expected to have a significant impact on our financial statements.

FASB ASC Topic 815 “Derivatives and Hedging (Topic 815): Hedge Accounting Improvements.” Update No. 2025-09 (“ASU 2025-09”). In November 2025, the FASB issued ASU 2025-09, which aligns hedge accounting more closely with an entity’s economic risk management practices. Key amendments include (i) to allow designating a variable price component of a nonfinancial forecasted purchase or sale as the hedged risk, (ii) to allow grouping individual forecasted transactions with similar (not identical) risk exposures, (iii) a new model for hedging forecasted interest on variable-rate debt, enabling changes in index or tenor without dedesignation, subject to simplifying assumptions, and (iv) additional clarifications related to hedge accounting of nonfinancial components, net written options, and dual-hedge strategies. ASU 2025-09 is effective on a prospective basis for annual reporting periods beginning after December 15, 2026. Early adoption is permitted. ASU 2025-09 is not expected to have a significant impact on our financial statements.