UNITED STATESSECURITIES AND EXCHANGE COMMISSIONWashington D.C. 20549_____________________________________ FORM 10-Q_____________________________________ (Mark One)☒QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934For the quarterly period ended June 30, 2026or☐TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934For the transition period fromtoCommission File Number: 001-36522 Investar Holding Corporation(Exact name of registrant as specified in its charter) Louisiana27-1560715(State or other jurisdiction ofincorporation or organization)(I.R.S. EmployerIdentification No.) 10500 Coursey Boulevard, Baton Rouge, Louisiana 70816(Address of principal executive offices, including zip code)(225) 227-2222(Registrant’s telephone number, including area code) Securities registered pursuant to Section 12(b) of the Act: Indicate by check mark whether the registrant (1)has filed all reports required to be filed by Section13 or 15(d) of the SecuritiesExchange Act of 1934 during the preceding 12months (or for such shorter period that the registrant was required to file suchreports), and (2)has been subject to such filing requirements for the past 90days.Yes☒No☐ Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submittedpursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period thatthe registrant was required to submit such files).Yes☒No☐ Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smallerreporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smallerreporting company,” and “emerging growth company” inRule12b-2 of the Exchange Act. Largeacceleratedfiler☐Accelerated filer☒Non-accelerated filer☐Smallerreportingcompany☒Emerging growth company☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period forcomplying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.☐ Indicate by check mark whether the registrant is a shell company (as defined in Rule12b-2 of the Exchange Act).Yes☐No☒ The number of shares outstanding of the issuer’s class of common stock, as of the latest practicable date, is as follows: Commonstock, $1.00 par value, 13,777,026shares outstanding as of August 4, 2026. TABLE OF CONTENTS Part I. Financial Information Item1.Financial Statements (Unaudited)Consolidated Balance Sheets as of June 30, 2026 and December 31, 2025Consolidated Statements of Incomefor the three and six months ended June30, 2026and 2025Consolidated Statements of Comprehensive Incomefor the three and six months ended June30, 2026and2025Consolidated Statements of Changes in Stockholders’Equity for the three and six months ended June 30,2026and 2025Consolidated Statements of Cash Flows for the six months ended June 30, 2026and 2025Notes to the Consolidated Financial StatementsNote 1. Summary of Significant Accounting PoliciesNote 2. Business CombinationsNote 3. EarningsPer Common ShareNote 4. Investment SecuritiesNote 5. Loans and Allowance for CreditLossesNote 6. Goodwill and Other Intangible AssetsNote 7. Stockholders’EquityNote 8. Stock-Based CompensationNote 9. Derivative Financial InstrumentsNote 10. Fair Values of Financial InstrumentsNote 11. Income TaxesNote 12. Commitments and ContingenciesNote 13. LeasesItem2.Management’s Discussion and Analysis of Financial Condition and Results of OperationsItem3.Quantitative and Qualitative Disclosures about Market RiskItem4.Controls and Procedures Part II. Other Information Item1A.Risk FactorsItem2.Unregistered Sales of Equity Securities andUse of ProceedsItem5.Other InformationItem6.ExhibitsSignatures GLOSSARY OF DEFINED TERMS Below is a listing of certain acronyms, abbreviations and defined terms, among others, used throughout this Quarterly Report onForm 10-Q. 2032 Notes – 5.125% Fixed-to-Floating Rate Subordinated Notes due 2032ACL– Allowance for Credit LossesAFS– Available For SaleALCO– Asset/Liability CommitteeAnnualReport–Investar Holding Corporation’s Annual Report on Form 10-K for the year ended December 31, 2025, filed with theSEC on March 16, 2026ASC– Accounting Standards CodificationASU– Accounting Standards UpdateBank– Investar Bank, National AssociationBoard– Board of Directors of Investar Holding CorporationBOLI– Bank Owned Life InsuranceCECL– Current Expected Credit LossCODM– Chief Operating Decision MakerCompany– Investar Holding Corporation and its wholly-owned subsidiary the Bank (also, “we,” “our,” or “us”)FASB– Financial Accounting Standards BoardFDIC– Federal Deposit Insurance CorporationFHLB– Federal Home Loan BankFNB– First National BankFRB– Federal Reserve Bank of AtlantaGAAP– U.S. G