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of Contents](#TOC)\n\n​\n\n​\n\n​\n\nUNITED STATES\n\nSECURITIES AND EXCHANGE COMMISSION\n\nWashington, D.C. 20549\n\nFORM 10-Q\n\n​\n\n☒\n\nQUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934\n\n​\n\nFor the quarterly period ended March 31, 2026\n\nor\n\n​\n\n☐\n\nTRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934\n\n​\n\nFor the transition period from ________ to ________\n\nCommission File Number: 001-42608\n\n​\n\n**MARATHON BANCORP, INC.******\n\n(Exact name of registrant as specified in its charter)\n\n​\n\n​\n\n**Maryland**\n\n \n\n**86-2191258**\n\n(State or other jurisdiction of\nincorporation or organization)\n\n \n\n(I.R.S. Employer\nIdentification No.)\n\n​\n\n​\n\n**500 Scott Street****,****Wausau****,****Wisconsin******\n\n \n\n**54403**\n\n(Address of principal executive offices)\n\n \n\n(Zip Code)\n\n​\n\nRegistrant’s telephone number, including area code: **(****715****)****845-7331**\n\nSecurities registered pursuant to Section 12(b) of the Act:\n\n​\n\n​\n\n​\n\n**Title of each class**\n\n** **\n\n**Trading**\n\n**Symbol(s)**\n\n** **\n\n**Name of each exchange on which registered**\n\n**Common Stock, $.01 par value**\n\n** **\n\n**MBBC**\n\n** **\n\n**The Nasdaq Stock Market LLC**\n\n​\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 filing 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 (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).\n\nYes ⌧       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 definitions of “large accelerated filer,” “accelerated filer,” “small reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.\n\nLarge accelerated filer\n\n☐\n\nAccelerated filer\n\n☐\n\nNon-accelerated filer\n\n⌧\n\nSmaller reporting company\n\n☒\n\nEmerging growth company\n\n☒\n\n \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 7(a)(2)(B) 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\nIndicate the number of shares outstanding of each of the issuer’s classes of common stock, as of the latest practical date:\n\nAs of May 12, 2026, there were 2,950,746 shares of the registrant’s common stock issued and outstanding.\n\n​\n\n​\n\n​\n\n​\n\n[Table of Contents](#TOC)\n\nMARATHON BANCORP, INC.\n\nINDEX\n\n​\n\n  ​ ​ ​\n\nPAGE NO.\n\n[PART I - FINANCIAL INFORMATION](#PARTIFINANCIALINFORMATION_201091)\n\n2\n\n \n\n \n\n[Item 1.](#Item1FinancialStatements_71601)\n\n[Consolidated Balance Sheets as of March 31, 2026 (Unaudited) and June 30, 2025](#Item1FinancialStatements_71601)\n\n2\n\n \n\n[Consolidated Statements of Income for the Three and Nine months ended March 31, 2026 and 2025 (Unaudited)](#STATEMENTSOFINCOME_534511)\n\n3\n\n \n\n[Consolidated Statements of Comprehensive Income for the Three and Nine months ended March 31, 2026 and 2025 (Unaudited)](#CONSOLIDATEDSTATEMENTSOFCOMPREHENSIVEINC)\n\n4-5\n\n \n\n[Consolidated Statements of Changes in Stockholders’ Equity for the Three and Nine months ended March 31, 2026 and 2025 (Unaudited)](#STATEMENTSOFCHANGESINEQUITY_208883)\n\n6\n\n \n\n[Consolidated Statements of Cash Flows for the Nine months ended March 31, 2026 and 2025 (Unaudited)](#STATEMENTSOFCASHFLOWS_152857)\n\n7\n\n \n\n[Notes to Consolidated Financial Statements (Unaudited)](#NOTESTOFINANCIALSTATEMENTS_554150)\n\n8\n\n \n\n \n\n[Item 2.](#Item2ManagementsDiscussionandAnalysisofF)\n\n[Management’s Discussion and Analysis of Financial Condition and Results of Operations](#Item2ManagementsDiscussionandAnalysisofF)\n\n37\n\n \n\n \n\n[Item 3.](#Item3QuantitativeandQualitativeDisclosur)\n\n[Quantitative and Qualitative Disclosures About Market Risk](#Item3QuantitativeandQualitativeDisclosur)\n\n59\n\n \n\n \n\n[Item 4.](#Item4ControlsandProcedures_666156)\n\n[Controls and Procedures](#Item4ControlsandProcedures_666156)\n\n59\n\n \n\n \n\n[PART II - OTHER INFORMATION](#PARTIIOTHERINFORMATION_675080)\n\n60\n\n \n\n \n\n[Item 1.](#Item1LegalProceedings_744755)\n\n[Legal Proceedings](#Item1LegalProceedings_744755)\n\n60\n\n[Item 1A.](#Item1ARiskFactors_713235)\n\n[Risk Factors](#Item1ARiskFactors_713235)\n\n60\n\n[Item 2.](#Item2UnregisteredSalesofEquitySecurities)\n\n[Unregistered Sales of Equity Securities and Use of Proceeds](#Item2UnregisteredSalesofEquitySecurities)\n\n60\n\n[Item 3.](#Item3DefaultsuponSeniorSecurities_412903)\n\n[Defaults upon Senior Securities](#Item3DefaultsuponSeniorSecurities_412903)\n\n60\n\n[Item 4.](#Item4MineSafetyDisclosures_307473)\n\n[Mine Safety Disclosures](#Item4MineSafetyDisclosures_307473)\n\n60\n\n[Item 5.](#Item5OtherInformation_735490)\n\n[Other information](#Item5OtherInformation_735490)\n\n60\n\n[Item 6.](#Item6Exhibits_578896)\n\n[Exhibits](#Item6Exhibits_578896)\n\n61\n\n \n\n \n\n[SIGNATURES](#SIGNATURES_357942)\n\n62\n\n​\n\n​\n\n​\n\n1\n\n[Table of Contents](#TOC)\n\nPART I - FINANCIAL INFORMATION"}