FORM 10-K ☒Annual Report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the fiscal year endedDecember 31, 2025 or ☐Transition Report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period fromto Commission File Number 0-32637 AMES NATIONAL CORPORATION(Exact name of registrant as specified in its charter) Iowa42-1039071(State or other jurisdiction of incorporation or organization)(I.R.S. Employer Identification No.) 323 Sixth Street, Ames, Iowa50010(Address of principal executive offices)(Zip Code) (515) 232-6251(Registrant's telephone number, including area code) Securities registered pursuant to Section 12(b) of the Exchange Act: Title of each classTrading Symbol(s)Name of each exchange on whichCommon Stock, $2.00 par valueATLOThe NASDAQ Capital Ma Securities registered pursuant to Section 12(g) of the Exchange Act: None Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.Yes☐No☒ Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Exchange Act.Yes☐No☒ Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities ExchangeAct of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has beensubject to such filing requirements for the past 90 days.Yes☒No☐ Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant toRule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the 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 smaller reportingcompany or an emerging growth company. See definition of “large accelerated filer,” “accelerated filer,” “smaller reporting company” and“emerging growth company” in Rule 12b-2 of the Exchange Act. Large accelerated filer☐Accelerated filer☐Non-accelerated filer☒Smaller reporting company☒Emerging growth company☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complyingwith any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.☐ Indicate by check mark whether the registrant has filed a report on and attestation to its management’s assessment of the effectiveness of itsinternal control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered publicaccounting firm that prepared or issued its audit report.☐ If securities are registered pursuant to Section 12(b) of the Act, indicate by check mark whether the financial statements of the registrantincluded in the filing reflect the correction of an error to previously issued financial statements.☐ Indicate by check mark whether any of those error corrections are restatements that required a recovery analysis of incentive-basedcompensation received by any of the registrant’s executive officers during the relevant recovery period pursuant to §240.10D-1(b).☐ Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).Yes☐No☒ As of June 30, 2025, the aggregate market value of voting common stock held by non-affiliates of the registrant, based upon the closing saleprice for the registrant’s common stock in the NASDAQ Capital Market, was $156,208,589. The number of shares outstanding of the registrant’s common stock on February 27, 2026, was 8,857,220. DOCUMENTS INCORPORATED BY REFERENCE Portions of the registrant’s definitive proxy statement, as filed with the Securities and Exchange Commission on or about March 13, 2026, areincorporated by reference into Part III of this Form 10-K. TABLE OF CONTENTS Part I Item 1.BusinessItem 1A.Risk FactorsItem 1B.Unresolved Staff CommentsItem 1C.CybersecurityItem 2.PropertiesItem 3.Legal ProceedingsItem 4.Mine Safety Disclosures Part II Item 5.Market for Registrant’s Common Equity, Related Shareholder Matters and Issuer Purchases of Equity SecuritiesItem 6.ReservedItem 7.Management’s Discussion and Analysis of Financial Condition and Results of OperationsItem 7A.Quantitative and Qualitative Disclosures about Market RiskItem 8.Financial Statements and Supplementary DataItem 9.Changes in and Disagreements with Accountants on Accounting and Financial DisclosureItem 9A.Controls and ProceduresItem 9B.Other InformationItem 9C.Disclosure Regarding Foreign Jurisdictions that Prevent Inspections Part III Item 10.Directors, Executive Officers and Corporate GovernanceItem 11.Executive CompensationItem 12.Security Ownership of Certain Beneficial Owners and Managemen