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of Contents](#TOC)\n\n​\n\n​\n\n**UNITED STATES**\n\n**SECURITIES AND EXCHANGE COMMISSION**\n\n**WASHINGTON, D.C. 20549**\n\n**FORM****10-Q**\n\n☒\n\nQuarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934\n\nFor the quarterly period ended March 31, 2026\n\n**OR**\n\n☐\n\nTransition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934\n\nFor the transition period from                    to                   \n\n**Commission File No.****000-56575**\n\n**Mercer Bancorp, Inc.**\n\n(Exact Name of Registrant as Specified in Its Charter)\n\n​\n\n​\n\n​\n\n**Maryland**\n\n  ​ ​ ​\n\n**92-3452469**\n\n(State or Other Jurisdiction of Incorporation or Organization)\n\n​\n\n(I.R.S. Employer Identification Number)\n\n​\n\n​\n\n​\n\n**1100 Irmscher Blvd****,****Celina****,****Ohio**\n\n​\n\n**45822**\n\n(Address of Principal Executive Offices)\n\n​\n\n(Zip Code)\n\n​\n\n**(****419****)****586-5158**\n\n(Registrant’s Telephone Number, Including Area Code)\n\n**N/A**\n\n(Former Name, Former Address and Former Fiscal Year, if Changed Since Last Report)\n\nSecurities registered pursuant to Section 12(b) of the Act: None.\n\nIndicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such requirements for the past 90 days.\n\nYES ☒      NO ☐\n\nIndicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 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 ☐\n\nIndicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act:\n\n​\n\n​\n\nLarge accelerated filer ☐\n\nAccelerated filer ☐\n\nNon-accelerated filer ☒\n\nSmaller reporting company ☒\n\n​\n\nEmerging growth company ☒\n\n​\n\nIf an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐\n\nIndicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act). YES ☐ NO ☒\n\nAs of May 11, 2026, 1,013,303 shares of the registrant’s common stock, par value $0.01 per share, were issued and outstanding.\n\n​\n\n​\n\n​\n\n​\n\n[Table of Contents](#TOC)\n\n**Mercer Bancorp, Inc.**\n\n**Form 10-Q**\n\nIndex\n\n​\n\n​\n\n​\n\n  ​ ​ ​\n\nPage\n\n[**Part I. – Financial Information**](#PartIFinancialInformation_749324)\n\n​\n\n​\n\n​\n\n​\n\n​\n\n[Item 1.](#Item1FinancialStatements_967918)\n\n​\n\n[Consolidated Financial Statements](#Item1FinancialStatements_967918)\n\n​\n\n1\n\n​\n\n​\n\n​\n\n​\n\n​\n\n​\n\n​\n\n[Balance Sheets as of March 31, 2026 (unaudited) and September 30, 2025 (audited)](#BalanceSheets_903510)\n\n​\n\n1\n\n​\n\n​\n\n​\n\n​\n\n​\n\n​\n\n​\n\n[Statements of Income for the Three and Six Months Ended March 31, 2026 and 2025 (unaudited)](#StatementsofIncome_968861)\n\n​\n\n2\n\n​\n\n​\n\n​\n\n​\n\n​\n\n​\n\n​\n\n[Statements of Comprehensive Income for the Three and Six Months Ended March 31, 2026 and 2025 (unaudited)](#StatementsofComprehensiveIncomeLoss_7418)\n\n​\n\n3\n\n​\n\n​\n\n​\n\n​\n\n​\n\n​\n\n​\n\n[Statements of Changes in Shareholders’ Equity for the Three and Six Months Ended March 31, 2026 and 2025 (unaudited)](#StatementsofChangesInEquity_9515)\n\n​\n\n4\n\n​\n\n​\n\n​\n\n​\n\n​\n\n​\n\n​\n\n[Statements of Cash Flows for the Six Months Ended March 31, 2026 and 2025 (unaudited)](#StatementsofCashFlows_980565)\n\n​\n\n5\n\n​\n\n​\n\n​\n\n​\n\n​\n\n​\n\n​\n\n[Notes to Financial Statements (unaudited)](#Note1NatureofOperationsandSummaryofSigni)\n\n​\n\n6\n\n​\n\n​\n\n​\n\n​\n\n​\n\n[Item 2.](#Item2ManagementsDiscussionandAnalysisofF)\n\n​\n\n[Management’s Discussion and Analysis of Financial Condition and Results of Operations](#Item2ManagementsDiscussionandAnalysisofF)\n\n​\n\n31\n\n​\n\n​\n\n​\n\n​\n\n​\n\n[Item 3.](#Item3QuantitativeandQualitativeDisclosur)\n\n​\n\n[Quantitative and Qualitative Disclosures about Market Risk](#Item3QuantitativeandQualitativeDisclosur)\n\n​\n\n43\n\n​\n\n​\n\n​\n\n​\n\n​\n\n[Item 4.](#Item4ControlsandProcedures_797446)\n\n​\n\n[Controls and Procedures](#Item4ControlsandProcedures_797446)\n\n​\n\n43\n\n​\n\n​\n\n​\n\n​\n\n​\n\n[**Part II. – Other Information**](#Part_2_Other_Information)\n\n​\n\n​\n\n​\n\n​\n\n​\n\n[Item 1.](#Legal_Proceedings)\n\n​\n\n[Legal Proceedings](#Legal_Proceedings)\n\n​\n\n43\n\n​\n\n​\n\n​\n\n​\n\n​\n\n[Item 1A.](#Item1ARiskFactors_64983)\n\n​\n\n[Risk Factors](#Item1ARiskFactors_64983)\n\n​\n\n44\n\n​\n\n​\n\n​\n\n​\n\n​\n\n[Item 2.](#Item2UnregisteredSalesofEquitySecurities)\n\n​\n\n[Unregistered Sales of Equity Securities and Use of Proceeds](#Item2UnregisteredSalesofEquitySecurities)\n\n​\n\n44\n\n​\n\n​\n\n​\n\n​\n\n​\n\n[Item 3.](#Item3DefaultsUponSeniorSecurities_201454)\n\n​\n\n[Defaults Upon Senior Securities](#Item3DefaultsUponSeniorSecurities_201454)\n\n​\n\n44\n\n​\n\n​\n\n​\n\n​\n\n​\n\n[Item 4.](#Item4MineSafetyDisclosures_936466)\n\n​\n\n[Mine Safety Disclosures](#Item4MineSafetyDisclosures_936466)\n\n​\n\n44\n\n​\n\n​\n\n​\n\n​\n\n​\n\n[Item 5.](#Item5OtherInformation_871750)\n\n​\n\n[Other Information](#Item5OtherInformation_871750)\n\n​\n\n44\n\n​\n\n​\n\n​\n\n​\n\n​\n\n[Item 6.](#Item6Exhibits_330209)\n\n​\n\n[Exhibits](#Item6Exhibits_330209)\n\n​\n\n45\n\n​\n\n​\n\n​\n\n​\n\n​\n\n​\n\n​\n\n[Signature Page](#SIGNATURES_550138)\n\n​\n\n46\n\n​\n\n​\n\n​\n\n​\n\n​\n\n​\n\n​\n\n[Table of Contents](#TOC)\n\n​\n\n​\n\n**Part I. – Financial Information**"}