0000842517 false 2025 Q3 12/31 xbrli:shares iso4217:USD iso4217:USD xbrli:shares isba:segment isba:security xbrli:pure 0000842517 2025-01-01 2025-09-30 0000842517 2025-11-06 0000842517 2025-09-30 0000842517 2024-12-31 0000842517 2025-07-01 2025-09-30 0000842517 2024-07-01 2024-09-30 0000842517 2024-01-01 2024-09-30 0000842517 us-gaap:CommonStockMember 2024-06-30 0000842517 us-gaap:DeferredCompensationShareBasedPaymentsMember 2024-06-30 0000842517 us-gaap:RetainedEarningsMember 2024-06-30 0000842517 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2024-06-30 0000842517 2024-06-30 0000842517 us-gaap:RetainedEarningsMember 2024-07-01 2024-09-30 0000842517 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2024-07-01 2024-09-30 0000842517 us-gaap:CommonStockMember 2024-07-01 2024-09-30 0000842517 us-gaap:DeferredCompensationShareBasedPaymentsMember 2024-07-01 2024-09-30 0000842517 isba:IsabellaBankCorporationRestrictedStockPlanMember us-gaap:AdditionalPaidInCapitalMember 2024-07-01 2024-09-30 0000842517 isba:IsabellaBankCorporationRestrictedStockPlanMember 2024-07-01 2024-09-30 0000842517 us-gaap:CommonStockMember 2024-09-30 0000842517 us-gaap:DeferredCompensationShareBasedPaymentsMember 2024-09-30 0000842517 us-gaap:RetainedEarningsMember 2024-09-30 0000842517 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2024-09-30 0000842517 2024-09-30 0000842517 us-gaap:CommonStockMember 2025-06-30 0000842517 us-gaap:DeferredCompensationShareBasedPaymentsMember 2025-06-30 0000842517 us-gaap:RetainedEarningsMember 2025-06-30 0000842517 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2025-06-30 0000842517 2025-06-30 0000842517 us-gaap:RetainedEarningsMember 2025-07-01 2025-09-30 0000842517 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2025-07-01 2025-09-30 0000842517 us-gaap:CommonStockMember 2025-07-01 2025-09-30 0000842517 us-gaap:DeferredCompensationShareBasedPaymentsMember 2025-07-01 2025-09-30 0000842517 isba:IsabellaBankCorporationRestrictedStockPlanMember us-gaap:AdditionalPaidInCapitalMember 2025-07-01 2025-09-30 0000842517 isba:IsabellaBankCorporationRestrictedStockPlanMember 2025-07-01 2025-09-30 0000842517 us-gaap:CommonStockMember 2025-09-30 0000842517 us-gaap:DeferredCompensationShareBasedPaymentsMember 2025-09-30 0000842517 us-gaap:RetainedEarningsMember 2025-09-30 0000842517 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2025-09-30 0000842517 us-gaap:CommonStockMember 2023-12-31 0000842517 us-gaap:DeferredCompensationShareBasedPaymentsMember 2023-12-31 0000842517 us-gaap:RetainedEarningsMember 2023-12-31 0000842517 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2023-12-31 0000842517 2023-12-31 0000842517 us-gaap:RetainedEarningsMember 2024-01-01 2024-09-30 0000842517 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2024-01-01 2024-09-30 0000842517 us-gaap:CommonStockMember 2024-01-01 2024-09-30 0000842517 isba:IsabellaBankCorporationRestrictedStockPlanMember us-gaap:CommonStockMember 2024-01-01 2024-09-30 0000842517 isba:IsabellaBankCorporationRestrictedStockPlanMember 2024-01-01 2024-09-30 0000842517 us-gaap:DeferredCompensationShareBasedPaymentsMember 2024-01-01 2024-09-30 0000842517 isba:IsabellaBankCorporationRestrictedStockPlanMember us-gaap:AdditionalPaidInCapitalMember 2024-01-01 2024-09-30 0000842517 us-gaap:CommonStockMember 2024-12-31 0000842517 us-gaap:DeferredCompensationShareBasedPaymentsMember 2024-12-31 0000842517 us-gaap:RetainedEarningsMember 2024-12-31 0000842517 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2024-12-31 0000842517 us-gaap:RetainedEarningsMember 2025-01-01 2025-09-30 0000842517 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2025-01-01 2025-09-30 0000842517 us-gaap:CommonStockMember 2025-01-01 2025-09-30 0000842517 isba:IsabellaBankCorporationRestrictedStockPlanMember us-gaap:CommonStockMember 2025-01-01 2025-09-30 0000842517 isba:IsabellaBankCorporationRestrictedStockPlanMember 2025-01-01 2025-09-30 0000842517 us-gaap:DeferredCompensationShareBasedPaymentsMember 2025-01-01 2025-09-30 0000842517 isba:IsabellaBankCorporationRestrictedStockPlanMember us-gaap:AdditionalPaidInCapitalMember 2025-01-01 2025-09-30 0000842517 us-gaap:USTreasurySecuritiesMember 2025-09-30 0000842517 us-gaap:USStatesAndPoliticalSubdivisionsMember 2025-09-30 0000842517 us-gaap:AuctionRateSecuritiesMember 2025-09-30 0000842517 us-gaap:MortgageBackedSecuritiesMember 2025-09-30 0000842517 us-gaap:CollateralizedMortgageObligationsMember 2025-09-30 0000842517 us-gaap:CorporateDebtSecuritiesMember 2025-09-30 0000842517 us-gaap:USTreasurySecuritiesMember 2024-12-31 0000842517 us-gaap:USStatesAndPoliticalSubdivisionsMember 2024-12-31 0000842517 us-gaap:AuctionRateSecuritiesMember 2024-12-31 0000842517 us-gaap:MortgageBackedSecuritiesMember 2024-12-31 0000842517 us-gaap:CollateralizedMortgageObligationsMember 2024-12-31 0000842517 us-gaap:CorporateDebtSecuritiesMember 2024-12-31 0000842517 isba:CommercialAndIndustrialSecuredPortfolioSegmentMember 2025-09-30 0000842517 isba:CommercialAndIndustrialSecuredPortfolioSegmentMember 2024-12-31 0000842517 isba:CommercialAndIndustrialUnsecuredPortfolioSegmentMember 2025-09-30 0000842517 isba:CommercialAndIndustrialUnsecuredPortfolioSegmentMember 2024-12-31 0000842517 us-gaap:CommercialPortfolioSegmentMember 2025-09-30 0000842517 us-gaap:CommercialPortfolioSegmentMember 2024-12-31 0000842517 isba:CommercialRealEstateOwnerOccupiedPortfolioSegmentMember 2025-09-30 0000842517 isba:CommercialRealEstateOwnerOccupiedPortfolioSegmentMember 2024-12-31 0000842517 isba:CommercialRealEstateNonOwnerOccupiedMember 2025-09-30 0000842517 isba:CommercialRealEstateNonOwnerOccupiedMember 2024-12-31 0000842517 isba:CommercialRealEstate14FamilyInvestorPortfolioSegmentMember 2025-09-30 0000842517 isba:CommercialRealEstate14FamilyInvestorPortfolioSegmentMember 2024-12-31 0000842517 isba:CommercialRealEstateMultifamilyPortfolioSegmentMember 2025-09-30 0000842517 isba:CommercialRealEstateMultifamilyPortfolioSegmentMember 2024-12-31 0000842517 us-gaap:CommercialRealEstateMember 2025-09-30 0000842517 us-gaap:CommercialRealEstateMember 2024-12-31 0000842517 isba:CommercialAdvancestoMortgageBrokersSegmentMember 2025-09-30 0000842517 isba:CommercialAdvancestoMortgageBrokersSegmentMember 2024-12-31 0000842517 isba:AgriculturalMortgagePortfolioSegmentMember 2025-09-30 0000842517 isba:AgriculturalMortgagePortfolioSegmentMember 2024-12-31 0000842517 isba:AgriculturalOtherPortfolioSegmentMember 2025-09-30 0000842517 isba:AgriculturalOtherPortfolioSegmentMember 2024-12-31 0000842517 isba:AgriculturalPortfolioSegmentMember 2025-09-30 0000842517 isba:AgriculturalPortfolioSegmentMember 2024-12-31 0000842517 isba:ResidentialRealEstateSeniorLienPortfolioSegmentMember 2025-09-30 0000842517 isba:ResidentialRealEstateSeniorLienPortfolioSegmentMember 2024-12-31 0000842517 isba:ResidentialRealEstateJuniorLienPortfolioSegmentMember 2025-09-30 0000842517 isba:ResidentialRealEstateJuniorLienPortfolioSegmentMember 2024-12-31 0000842517 isba:ResidentialRealEstateHomeEquityLinesOfCreditPortfolioSegmentMember 2025-09-30 0000842517 isba:ResidentialRealEstateHomeEquityLinesOfCreditPortfolioSegmentMember 2024-12-31 0000842517 us-gaap:ResidentialMortgageMember 2025-09-30 0000842517 us-gaap:ResidentialMortgageMember 2024-12-31 0000842517 isba:ConsumerSecuredDirectPortfolioSegmentMember 2025-09-30 0000842517 isba:ConsumerSecuredDirectPortfolioSegmentMember 2024-12-31 0000842517 isba:ConsumerSecuredIndirectPortfolioSegmentMember 2025-09-30 0000842517 isba:ConsumerSecuredIndirectPortfolioSegmentMember 2024-12-31 0000842517 isba:ConsumerUnsecuredPortfolioSegmentMember 2025-09-30 0000842517 isba:ConsumerUnsecuredPortfolioSegmentMember 2024-12-31 0000842517 us-gaap:ConsumerPortfolioSegmentMember 2025-09-30 0000842517 us-gaap:ConsumerPortfolioSegmentMember 2024-12-31 0000842517 us-gaap:CustomerConcentrationRiskMember isba:CommercialAndAgriculturalPortfolioSegmentMember 2025-01-01 2025-09-30 0000842517 isba:CommercialAndAgriculturalPortfolioSegmentMember 2025-01-01 2025-09-30 0000842517 srt:MaximumMember 2025-01-01 2025-09-30 0000842517 us-gaap:ResidentialPortfolioSegmentMember 2025-01-01 2025-09-30 0000842517 isba:ResidentialPrivatelyInsuredFinancingReceivableMember 2025-01-01 2025-09-30 0000842517 srt:MaximumMember us-gaap:ConsumerPortfolioSegmentMember 2025-01-01 2025-09-30 0000842517 isba:CommercialAgriculturalandResidentialPortfolioSegmentsMember 2025-01-01 2025-09-30 0000842517 us-gaap:LoansMember 2025-09-30 0000842517 us-gaap:LoansMember 2024-12-31 0000842517 us-gaap:FinancingReceivables30To59DaysPastDueMember isba:CommercialAndIndustrialSecuredPortfolioSegmentMember 2025-09-30 0000842517 us-gaap:FinancingReceivables60To89DaysPastDueMember isba:CommercialAndIndustrialSecuredPortfolioSegmentMember 2025-09-30 0000842517 us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember isba:CommercialAndIndustrialSecuredPortfolioSegmentMember 2025-09-30 0000842517 us-gaap:FinancialAssetNotPastDueMember isba:CommercialAndIndustrialSecuredPortfolioSegmentMember 2025-09-30 0000842517 us-gaap:FinancingReceivables30To59DaysPastDueMember isba:CommercialAndIndustrialUnsecuredPortfolioSegmentMember 2025-09-30 0000842517 us-gaap:FinancingReceivables60To89DaysPastDueMember isba:CommercialAndIndustrialUnsecuredPortfolioSegmentMember 2025-09-30 0000842517 us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember isba:CommercialAndIndustrialUnsecuredPortfolioSegmentMember 2025-09-30 0000842517 us-gaap:FinancialAssetNotPastDueMember isba:CommercialAndIndustrialUnsecuredPortfolioSegmentMember 2025-09-30 0000842517 us-gaap:FinancingReceivables30To59DaysPastDueMember us-gaap:CommercialPortfolioSegmentMember 2025-09-30 0000842517 us-gaap:FinancingReceivables60To89DaysPastDueMember us-gaap:CommercialPortfolioSegmentMember 2025-09-30 0000842517 us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember us-gaap:CommercialPortfolioSegmentMember 2025-09-30 0000842517 us-gaap:FinancialAssetNotPastDueMember us-gaap:CommercialPortfolioSegmentMember 2025-09-30 0000842517 us-gaap:FinancingReceivables30To59DaysPastDueMember isba:CommercialRealEstateOwnerOccupiedPortfolioSegmentMember 2025-09-30 0000842517 us-gaap:FinancingReceivables60To89DaysPastDueMember isba:CommercialRealEstateOwnerOccupiedPortfolioSegmentMember 2025-09-30 0000842517 us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember isba:CommercialRealEstateOwnerOccupiedPortfolioSegmentMember 2025-09-30 0000842517 us-gaap:FinancialAssetNotPastDueMember isba:CommercialRealEstateOwnerOccupiedPortfolioSegmentMember 2025-09-30 0000842517 us-gaap:FinancingReceivables30To59DaysPastDueMember isba:CommercialRealEstateNonOwnerOccupiedMember 2025-09-30 0000842517 us-gaap:FinancingReceivables60To89DaysPastDueMember isba:CommercialRealEstateNonOwnerOccupiedMember 2025-09-30 0000842517 us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember isba:CommercialRealEstateNonOwnerOccupiedMember 2025-09-30 0000842517 us-gaap:FinancialAssetNotPastDueMember isba:CommercialRealEstateNonOwnerOccupiedMember 2025-09-30 0000842517 us-gaap:FinancingReceivables30To59DaysPastDueMember isba:CommercialRealEstate14FamilyInvestorPortfolioSegmentMember 2025-09-30 0000842517 us-gaap:FinancingReceivables60To89DaysPastDueMember isba:CommercialRealEstate14FamilyInvestorPortfolioSegmentMember 2025-09-30 0000842517 us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember isba:CommercialRealEstate14FamilyInvestorPortfolioSegmentMember 2025-09-30 0000842517 us-gaap:FinancialAssetNotPastDueMember isba:CommercialRealEstate14FamilyInvestorPortfolioSegmentMember 2025-09-30 0000842517 us-gaap:FinancingReceivables30To59DaysPastDueMember isba:CommercialRealEstateMultifamilyPortfolioSegmentMember 2025-09-30 0000842517 us-gaap:FinancingReceivables60To89DaysPastDueMember isba:CommercialRealEstateMultifamilyPortfolioSegmentMember 2025-09-30 0000842517 us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember isba:CommercialRealEstateMultifamilyPortfolioSegmentMember 2025-09-30 0000842517 us-gaap:FinancialAssetNotPastDueMember isba:CommercialRealEstateMultifamilyPortfolioSegmentMember 2025-09-30 0000842517 us-gaap:FinancingReceivables30To59DaysPastDueMember us-gaap:CommercialRealEstateMember 2025-09-30 0000842517 us-gaap:FinancingReceivables60To89DaysPastDueMember us-gaap:CommercialRealEstateMember 2025-09-30 0000842517 us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember us-gaap:CommercialRealEstateMember 2025-09-30 0000842517 us-gaap:FinancialAssetNotPastDueMember us-gaap:CommercialRealEstateMember 2025-09-30 0000842517 us-gaap:FinancingReceivables30To59DaysPastDueMember isba:CommercialAdvancestoMortgageBrokersSegmentMember 2025-09-30 0000842517 us-gaap:FinancingReceivables60To89DaysPastDueMember isba:CommercialAdvancestoMortgageBrokersSegmentMember 2025-09-30 0000842517 us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember isba:CommercialAdvancestoMortgageBrokersSegmentMember 2025-09-30 0000842517 us-gaap:FinancialAssetNotPastDueMember isba:CommercialAdvancestoMortgageBrokersSegmentMember 2025-09-30 0000842517 us-gaap:FinancingReceivables30To59DaysPastDueMember isba:AgriculturalMortgagePortfolioSegmentMember 2025-09-30 0000842517 us-gaap:FinancingReceivables60To89DaysPastDueMember isba:AgriculturalMortgagePortfolioSegmentMember 2025-09-30 0000842517 us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember isba:AgriculturalMortgagePortfolioSegmentMember 2025-09-30 0000842517 us-gaap:FinancialAssetNotPastDueMember isba:AgriculturalMortgagePortfolioSegmentMember 2025-09-30 0000842517 us-gaap:FinancingReceivables30To59DaysPastDueMember isba:AgriculturalOtherPortfolioSegmentMember 2025-09-30 0000842517 us-gaap:FinancingReceivables60To89DaysPastDueMember isba:AgriculturalOtherPortfolioSegmentMember 2025-09-30 0000842517 us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember isba:AgriculturalOtherPortfolioSegmentMember 2025-09-30 0000842517 us-gaap:FinancialAssetNotPastDueMember isba:AgriculturalOtherPortfolioSegmentMember 2025-09-30 0000842517 us-gaap:FinancingReceivables30To59DaysPastDueMember isba:AgriculturalPortfolioSegmentMember 2025-09-30 0000842517 us-gaap:FinancingReceivables60To89DaysPastDueMember isba:AgriculturalPortfolioSegmentMember 2025-09-30 0000842517 us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember isba:AgriculturalPortfolioSegmentMember 2025-09-30 0000842517 us-gaap:FinancialAssetNotPastDueMember isba:AgriculturalPortfolioSegmentMember 2025-09-30 0000842517 us-gaap:FinancingReceivables30To59DaysPastDueMember isba:ResidentialRealEstateSeniorLienPortfolioSegmentMember 2025-09-30 0000842517 us-gaap:FinancingReceivables60To89DaysPastDueMember isba:ResidentialRealEstateSeniorLienPortfolioSegmentMember 2025-09-30 0000842517 us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember isba:ResidentialRealEstateSeniorLienPortfolioSegmentMember 2025-09-30 0000842517 us-gaap:FinancialAssetNotPastDueMember isba:ResidentialRealEstateSeniorLienPortfolioSegmentMember 2025-09-30 0000842517 us-gaap:FinancingReceivables30To59DaysPastDueMember isba:ResidentialRealEstateJuniorLienPortfolioSegmentMember 2025-09-30 0000842517 us-gaap:FinancingReceivables60To89DaysPastDueMember isba:ResidentialRealEstateJuniorLienPortfolioSegmentMember 2025-09-30 0000842517 us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember isba:ResidentialRealEstateJuniorLienPortfolioSegmentMember 2025-09-30 0000842517 us-gaap:FinancialAssetNotPastDueMember isba:ResidentialRealEstateJuniorLienPortfolioSegmentMember 2025-09-30 0000842517 us-gaap:FinancingReceivables30To59DaysPastDueMember isba:ResidentialRealEstateHomeEquityLinesOfCreditPortfolioSegmentMember 2025-09-30 0000842517 us-gaap:FinancingReceivables60To89DaysPastDueMember isba:ResidentialRealEstateHomeEquityLinesOfCreditPortfolioSegmentMember 2025-09-30 0000842517 us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember isba:ResidentialRealEstateHomeEquityLinesOfCreditPortfolioSegmentMember 2025-09-30 0000842517 us-gaap:FinancialAssetNotPastDueMember isba:ResidentialRealEstateHomeEquityLinesOfCreditPortfolioSegmentMember 2025-09-30 0000842517 us-gaap:FinancingReceivables30To59DaysPastDueMember us-gaap:ResidentialMortgageMember 2025-09-30 0000842517 us-gaap:FinancingReceivables60To89DaysPastDueMember us-gaap:ResidentialMortgageMember 2025-09-30 0000842517 us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember us-gaap:ResidentialMortgageMember 2025-09-30 0000842517 us-gaap:FinancialAssetNotPastDueMember us-gaap:ResidentialMortgageMember 2025-09-30 0000842517 us-gaap:FinancingReceivables30To59DaysPastDueMember isba:ConsumerSecuredDirectPortfolioSegmentMember 2025-09-30 0000842517 us-gaap:FinancingReceivables60To89DaysPastDueMember isba:ConsumerSecuredDirectPortfolioSegmentMember 2025-09-30 0000842517 us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember isba:ConsumerSecuredDirectPortfolioSegmentMember 2025-09-30 0000842517 us-gaap:FinancialAssetNotPastDueMember isba:ConsumerSecuredDirectPortfolioSegmentMember 2025-09-30 0000842517 us-gaap:FinancingReceivables30To59DaysPastDueMember isba:ConsumerSecuredIndirectPortfolioSegmentMember 2025-09-30 0000842517 us-gaap:FinancingReceivables60To89DaysPastDueMember isba:ConsumerSecuredIndirectPortfolioSegmentMember 2025-09-30 0000842517 us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember isba:ConsumerSecuredIndirectPortfolioSegmentMember 2025-09-30 0000842517 us-gaap:FinancialAssetNotPastDueMember isba:ConsumerSecuredIndirectPortfolioSegmentMember 2025-09-30 0000842517 us-gaap:FinancingReceivables30To59DaysPastDueMember isba:ConsumerUnsecuredPortfolioSegmentMember 2025-09-30 0000842517 us-gaap:FinancingReceivables60To89DaysPastDueMember isba:ConsumerUnsecuredPortfolioSegmentMember 2025-09-30 0000842517 us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember isba:ConsumerUnsecuredPortfolioSegmentMember 2025-09-30 0000842517 us-gaap:FinancialAssetNotPastDueMember isba:ConsumerUnsecuredPortfolioSegmentMember 2025-09-30 0000842517 us-gaap:FinancingReceivables30To59DaysPastDueMember us-gaap:ConsumerPortfolioSegmentMember 2025-09-30 0000842517 us-gaap:FinancingReceivables60To89DaysPastDueMember us-gaap:ConsumerPortfolioSegmentMember 2025-09-30 0000842517 us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember us-gaap:ConsumerPortfolioSegmentMember 2025-09-30 0000842517 us-gaap:FinancialAssetNotPastDueMember us-gaap:ConsumerPortfolioSegmentMember 2025-09-30 0000842517 us-gaap:FinancingReceivables30To59DaysPastDueMember 2025-09-30 0000842517 us-gaap:FinancingReceivables60To89DaysPastDueMember 2025-09-30 0000842517 us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2025-09-30 0000842517 us-gaap:FinancialAssetNotPastDueMember 2025-09-30 0000842517 us-gaap:FinancingReceivables30To59DaysPastDueMember isba:CommercialAndIndustrialSecuredPortfolioSegmentMember 2024-12-31 0000842517 us-gaap:FinancingReceivables60To89DaysPastDueMember isba:CommercialAndIndustrialSecuredPortfolioSegmentMember 2024-12-31 0000842517 us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember isba:CommercialAndIndustrialSecuredPortfolioSegmentMember 2024-12-31 0000842517 us-gaap:FinancialAssetNotPastDueMember isba:CommercialAndIndustrialSecuredPortfolioSegmentMember 2024-12-31 0000842517 us-gaap:FinancingReceivables30To59DaysPastDueMember isba:CommercialAndIndustrialUnsecuredPortfolioSegmentMember 2024-12-31 0000842517 us-gaap:FinancingReceivables60To89DaysPastDueMember isba:CommercialAndIndustrialUnsecuredPortfolioSegmentMember 2024-12-31 0000842517 us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember isba:CommercialAndIndustrialUnsecuredPortfolioSegmentMember 2024-12-31 0000842517 us-gaap:FinancialAssetNotPastDueMember isba:CommercialAndIndustrialUnsecuredPortfolioSegmentMember 2024-12-31 0000842517 us-gaap:FinancingReceivables30To59DaysPastDueMember us-gaap:CommercialPortfolioSegmentMember 2024-12-31 0000842517 us-gaap:FinancingReceivables60To89DaysPastDueMember us-gaap:CommercialPortfolioSegmentMember 2024-12-31 0000842517 us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember us-gaap:CommercialPortfolioSegmentMember 2024-12-31 0000842517 us-gaap:FinancialAssetNotPastDueMember us-gaap:CommercialPortfolioSegmentMember 2024-12-31 0000842517 us-gaap:FinancingReceivables30To59DaysPastDueMember isba:CommercialRealEstateOwnerOccupiedPortfolioSegmentMember 2024-12-31 0000842517 us-gaap:FinancingReceivables60To89DaysPastDueMember isba:CommercialRealEstateOwnerOccupiedPortfolioSegmentMember 2024-12-31 0000842517 us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember isba:CommercialRealEstateOwnerOccupiedPortfolioSegmentMember 2024-12-31 0000842517 us-gaap:FinancialAssetNotPastDueMember isba:CommercialRealEstateOwnerOccupiedPortfolioSegmentMember 2024-12-31 0000842517 us-gaap:FinancingReceivables30To59DaysPastDueMember isba:CommercialRealEstateNonOwnerOccupiedMember 2024-12-31 0000842517 us-gaap:FinancingReceivables60To89DaysPastDueMember isba:CommercialRealEstateNonOwnerOccupiedMember 2024-12-31 0000842517 us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember isba:CommercialRealEstateNonOwnerOccupiedMember 2024-12-31 0000842517 us-gaap:FinancialAssetNotPastDueMember isba:CommercialRealEstateNonOwnerOccupiedMember 2024-12-31 0000842517 us-gaap:FinancingReceivables30To59DaysPastDueMember isba:CommercialRealEstate14FamilyInvestorPortfolioSegmentMember 2024-12-31 0000842517 us-gaap:FinancingReceivables60To89DaysPastDueMember isba:CommercialRealEstate14FamilyInvestorPortfolioSegmentMember 2024-12-31 0000842517 us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember isba:CommercialRealEstate14FamilyInvestorPortfolioSegmentMember 2024-12-31 0000842517 us-gaap:FinancialAssetNotPastDueMember isba:CommercialRealEstate14FamilyInvestorPortfolioSegmentMember 2024-12-31 0000842517 us-gaap:FinancingReceivables30To59DaysPastDueMember isba:CommercialRealEstateMultifamilyPortfolioSegmentMember 2024-12-31 0000842517 us-gaap:FinancingReceivables60To89DaysPastDueMember isba:CommercialRealEstateMultifamilyPortfolioSegmentMember 2024-12-31 0000842517 us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember isba:CommercialRealEstateMultifamilyPortfolioSegmentMember 2024-12-31 0000842517 us-gaap:FinancialAssetNotPastDueMember isba:CommercialRealEstateMultifamilyPortfolioSegmentMember 2024-12-31 0000842517 us-gaap:FinancingReceivables30To59DaysPastDueMember us-gaap:CommercialRealEstateMember 2024-12-31 0000842517 us-gaap:FinancingReceivables60To89DaysPastDueMember us-gaap:CommercialRealEstateMember 2024-12-31 0000842517 us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember us-gaap:CommercialRealEstateMember 2024-12-31 0000842517 us-gaap:FinancialAssetNotPastDueMember us-gaap:CommercialRealEstateMember 2024-12-31 0000842517 us-gaap:FinancingReceivables30To59DaysPastDueMember isba:CommercialAdvancestoMortgageBrokersSegmentMember 2024-12-31 0000842517 us-gaap:FinancingReceivables60To89DaysPastDueMember isba:CommercialAdvancestoMortgageBrokersSegmentMember 2024-12-31 0000842517 us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember isba:CommercialAdvancestoMortgageBrokersSegmentMember 2024-12-31 0000842517 us-gaap:FinancialAssetNotPastDueMember isba:CommercialAdvancestoMortgageBrokersSegmentMember 2024-12-31 0000842517 us-gaap:FinancingReceivables30To59DaysPastDueMember isba:AgriculturalMortgagePortfolioSegmentMember 2024-12-31 0000842517 us-gaap:FinancingReceivables60To89DaysPastDueMember isba:AgriculturalMortgagePortfolioSegmentMember 2024-12-31 0000842517 us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember isba:AgriculturalMortgagePortfolioSegmentMember 2024-12-31 0000842517 us-gaap:FinancialAssetNotPastDueMember isba:AgriculturalMortgagePortfolioSegmentMember 2024-12-31 0000842517 us-gaap:FinancingReceivables30To59DaysPastDueMember isba:AgriculturalOtherPortfolioSegmentMember 2024-12-31 0000842517 us-gaap:FinancingReceivables60To89DaysPastDueMember isba:AgriculturalOtherPortfolioSegmentMember 2024-12-31 0000842517 us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember isba:AgriculturalOtherPortfolioSegmentMember 2024-12-31 0000842517 us-gaap:FinancialAssetNotPastDueMember isba:AgriculturalOtherPortfolioSegmentMember 2024-12-31 0000842517 us-gaap:FinancingReceivables30To59DaysPastDueMember isba:AgriculturalPortfolioSegmentMember 2024-12-31 0000842517 us-gaap:FinancingReceivables60To89DaysPastDueMember isba:AgriculturalPortfolioSegmentMember 2024-12-31 0000842517 us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember isba:AgriculturalPortfolioSegmentMember 2024-12-31 0000842517 us-gaap:FinancialAssetNotPastDueMember isba:AgriculturalPortfolioSegmentMember 2024-12-31 0000842517 us-gaap:FinancingReceivables30To59DaysPastDueMember isba:ResidentialRealEstateSeniorLienPortfolioSegmentMember 2024-12-31 0000842517 us-gaap:FinancingReceivables60To89DaysPastDueMember isba:ResidentialRealEstateSeniorLienPortfolioSegmentMember 2024-12-31 0000842517 us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember isba:ResidentialRealEstateSeniorLienPortfolioSegmentMember 2024-12-31 0000842517 us-gaap:FinancialAssetNotPastDueMember isba:ResidentialRealEstateSeniorLienPortfolioSegmentMember 2024-12-31 0000842517 us-gaap:FinancingReceivables30To59DaysPastDueMember isba:ResidentialRealEstateJuniorLienPortfolioSegmentMember 2024-12-31 0000842517 us-gaap:FinancingReceivables60To89DaysPastDueMember isba:ResidentialRealEstateJuniorLienPortfolioSegmentMember 2024-12-31 0000842517 us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember isba:ResidentialRealEstateJuniorLienPortfolioSegmentMember 2024-12-31 0000842517 us-gaap:FinancialAssetNotPastDueMember isba:ResidentialRealEstateJuniorLienPortfolioSegmentMember 2024-12-31 0000842517 us-gaap:FinancingReceivables30To59DaysPastDueMember isba:ResidentialRealEstateHomeEquityLinesOfCreditPortfolioSegmentMember 2024-12-31 0000842517 us-gaap:FinancingReceivables60To89DaysPastDueMember isba:ResidentialRealEstateHomeEquityLinesOfCreditPortfolioSegmentMember 2024-12-31 0000842517 us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember isba:ResidentialRealEstateHomeEquityLinesOfCreditPortfolioSegmentMember 2024-12-31 0000842517 us-gaap:FinancialAssetNotPastDueMember isba:ResidentialRealEstateHomeEquityLinesOfCreditPortfolioSegmentMember 2024-12-31 0000842517 us-gaap:FinancingReceivables30To59DaysPastDueMember us-gaap:ResidentialMortgageMember 2024-12-31 0000842517 us-gaap:FinancingReceivables60To89DaysPastDueMember us-gaap:ResidentialMortgageMember 2024-12-31 0000842517 us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember us-gaap:ResidentialMortgageMember 2024-12-31 0000842517 us-gaap:FinancialAssetNotPastDueMember us-gaap:ResidentialMortgageMember 2024-12-31 0000842517 us-gaap:FinancingReceivables30To59DaysPastDueMember isba:ConsumerSecuredDirectPortfolioSegmentMember 2024-12-31 0000842517 us-gaap:FinancingReceivables60To89DaysPastDueMember isba:ConsumerSecuredDirectPortfolioSegmentMember 2024-12-31 0000842517 us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember isba:ConsumerSecuredDirectPortfolioSegmentMember 2024-12-31 0000842517 us-gaap:FinancialAssetNotPastDueMember isba:ConsumerSecuredDirectPortfolioSegmentMember 2024-12-31 0000842517 us-gaap:FinancingReceivables30To59DaysPastDueMember isba:ConsumerSecuredIndirectPortfolioSegmentMember 2024-12-31 0000842517 us-gaap:FinancingReceivables60To89DaysPastDueMember isba:ConsumerSecuredIndirectPortfolioSegmentMember 2024-12-31 0000842517 us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember isba:ConsumerSecuredIndirectPortfolioSegmentMember 2024-12-31 0000842517 us-gaap:FinancialAssetNotPastDueMember isba:ConsumerSecuredIndirectPortfolioSegmentMember 2024-12-31 0000842517 us-gaap:FinancingReceivables30To59DaysPastDueMember isba:ConsumerUnsecuredPortfolioSegmentMember 2024-12-31 0000842517 us-gaap:FinancingReceivables60To89DaysPastDueMember isba:ConsumerUnsecuredPortfolioSegmentMember 2024-12-31 0000842517 us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember isba:ConsumerUnsecuredPortfolioSegmentMember 2024-12-31 0000842517 us-gaap:FinancialAssetNotPastDueMember isba:ConsumerUnsecuredPortfolioSegmentMember 2024-12-31 0000842517 us-gaap:FinancingReceivables30To59DaysPastDueMember us-gaap:ConsumerPortfolioSegmentMember 2024-12-31 0000842517 us-gaap:FinancingReceivables60To89DaysPastDueMember us-gaap:ConsumerPortfolioSegmentMember 2024-12-31 0000842517 us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember us-gaap:ConsumerPortfolioSegmentMember 2024-12-31 0000842517 us-gaap:FinancialAssetNotPastDueMember us-gaap:ConsumerPortfolioSegmentMember 2024-12-31 0000842517 us-gaap:FinancingReceivables30To59DaysPastDueMember 2024-12-31 0000842517 us-gaap:FinancingReceivables60To89DaysPastDueMember 2024-12-31 0000842517 us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2024-12-31 0000842517 us-gaap:FinancialAssetNotPastDueMember 2024-12-31 0000842517 isba:RiskRatings13Member isba:CommercialAndIndustrialSecuredPortfolioSegmentMember 2025-09-30 0000842517 isba:LowSatisfactoryMember isba:CommercialAndIndustrialSecuredPortfolioSegmentMember 2025-09-30 0000842517 us-gaap:SpecialMentionMember isba:CommercialAndIndustrialSecuredPortfolioSegmentMember 2025-09-30 0000842517 us-gaap:SubstandardMember isba:CommercialAndIndustrialSecuredPortfolioSegmentMember 2025-09-30 0000842517 isba:VulnerableMember isba:CommercialAndIndustrialSecuredPortfolioSegmentMember 2025-09-30 0000842517 us-gaap:DoubtfulMember isba:CommercialAndIndustrialSecuredPortfolioSegmentMember 2025-09-30 0000842517 isba:LossMember isba:CommercialAndIndustrialSecuredPortfolioSegmentMember 2025-09-30 0000842517 isba:CommercialAndIndustrialSecuredPortfolioSegmentMember 2025-01-01 2025-09-30 0000842517 isba:RiskRatings13Member isba:CommercialAndIndustrialUnsecuredPortfolioSegmentMember 2025-09-30 0000842517 isba:LowSatisfactoryMember isba:CommercialAndIndustrialUnsecuredPortfolioSegmentMember 2025-09-30 0000842517 us-gaap:SpecialMentionMember isba:CommercialAndIndustrialUnsecuredPortfolioSegmentMember 2025-09-30 0000842517 us-gaap:SubstandardMember isba:CommercialAndIndustrialUnsecuredPortfolioSegmentMember 2025-09-30 0000842517 isba:VulnerableMember isba:CommercialAndIndustrialUnsecuredPortfolioSegmentMember 2025-09-30 0000842517 us-gaap:DoubtfulMember isba:CommercialAndIndustrialUnsecuredPortfolioSegmentMember 2025-09-30 0000842517 isba:LossMember isba:CommercialAndIndustrialUnsecuredPortfolioSegmentMember 2025-09-30 0000842517 isba:CommercialAndIndustrialUnsecuredPortfolioSegmentMember 2025-01-01 2025-09-30 0000842517 isba:RiskRatings13Member isba:CommercialRealEstateOwnerOccupiedPortfolioSegmentMember 2025-09-30 0000842517 isba:LowSatisfactoryMember isba:CommercialRealEstateOwnerOccupiedPortfolioSegmentMember 2025-09-30 0000842517 us-gaap:SpecialMentionMember isba:CommercialRealEstateOwnerOccupiedPortfolioSegmentMember 2025-09-30 0000842517 us-gaap:SubstandardMember isba:CommercialRealEstateOwnerOccupiedPortfolioSegmentMember 2025-09-30 0000842517 isba:VulnerableMember isba:CommercialRealEstateOwnerOccupiedPortfolioSegmentMember 2025-09-30 0000842517 us-gaap:DoubtfulMember isba:CommercialRealEstateOwnerOccupiedPortfolioSegmentMember 2025-09-30 0000842517 isba:LossMember isba:CommercialRealEstateOwnerOccupiedPortfolioSegmentMember 2025-09-30 0000842517 isba:CommercialRealEstateOwnerOccupiedPortfolioSegmentMember 2025-01-01 2025-09-30 0000842517 isba:RiskRatings13Member isba:CommercialRealEstateNonOwnerOccupiedMember 2025-09-30 0000842517 isba:LowSatisfactoryMember isba:CommercialRealEstateNonOwnerOccupiedMember 2025-09-30 0000842517 us-gaap:SpecialMentionMember isba:CommercialRealEstateNonOwnerOccupiedMember 2025-09-30 0000842517 us-gaap:SubstandardMember isba:CommercialRealEstateNonOwnerOccupiedMember 2025-09-30 0000842517 isba:VulnerableMember isba:CommercialRealEstateNonOwnerOccupiedMember 2025-09-30 0000842517 us-gaap:DoubtfulMember isba:CommercialRealEstateNonOwnerOccupiedMember 2025-09-30 0000842517 isba:LossMember isba:CommercialRealEstateNonOwnerOccupiedMember 2025-09-30 0000842517 isba:CommercialRealEstateNonOwnerOccupiedMember 2025-01-01 2025-09-30 0000842517 isba:RiskRatings13Member isba:CommercialRealEstate14FamilyInvestorPortfolioSegmentMember 2025-09-30 0000842517 isba:LowSatisfactoryMember isba:CommercialRealEstate14FamilyInvestorPortfolioSegmentMember 2025-09-30 0000842517 us-gaap:SpecialMentionMember isba:CommercialRealEstate14FamilyInvestorPortfolioSegmentMember 2025-09-30 0000842517 us-gaap:SubstandardMember isba:CommercialRealEstate14FamilyInvestorPortfolioSegmentMember 2025-09-30 0000842517 isba:VulnerableMember isba:CommercialRealEstate14FamilyInvestorPortfolioSegmentMember 2025-09-30 0000842517 us-gaap:DoubtfulMember isba:CommercialRealEstate14FamilyInvestorPortfolioSegmentMember 2025-09-30 0000842517 isba:LossMember isba:CommercialRealEstate14FamilyInvestorPortfolioSegmentMember 2025-09-30 0000842517 isba:CommercialRealEstate14FamilyInvestorPortfolioSegmentMember 2025-01-01 2025-09-30 0000842517 isba:RiskRatings13Member isba:CommercialRealEstateMultifamilyPortfolioSegmentMember 2025-09-30 0000842517 isba:LowSatisfactoryMember isba:CommercialRealEstateMultifamilyPortfolioSegmentMember 2025-09-30 0000842517 us-gaap:SpecialMentionMember isba:CommercialRealEstateMultifamilyPortfolioSegmentMember 2025-09-30 0000842517 us-gaap:SubstandardMember isba:CommercialRealEstateMultifamilyPortfolioSegmentMember 2025-09-30 0000842517 isba:VulnerableMember isba:CommercialRealEstateMultifamilyPortfolioSegmentMember 2025-09-30 0000842517 us-gaap:DoubtfulMember isba:CommercialRealEstateMultifamilyPortfolioSegmentMember 2025-09-30 0000842517 isba:LossMember isba:CommercialRealEstateMultifamilyPortfolioSegmentMember 2025-09-30 0000842517 isba:CommercialRealEstateMultifamilyPortfolioSegmentMember 2025-01-01 2025-09-30 0000842517 isba:RiskRatings13Member isba:CommercialAdvancestoMortgageBrokersSegmentMember 2025-09-30 0000842517 isba:CommercialAdvancestoMortgageBrokersSegmentMember 2025-01-01 2025-09-30 0000842517 isba:RiskRatings13Member isba:AgriculturalMortgagePortfolioSegmentMember 2025-09-30 0000842517 isba:LowSatisfactoryMember isba:AgriculturalMortgagePortfolioSegmentMember 2025-09-30 0000842517 us-gaap:SpecialMentionMember isba:AgriculturalMortgagePortfolioSegmentMember 2025-09-30 0000842517 us-gaap:SubstandardMember isba:AgriculturalMortgagePortfolioSegmentMember 2025-09-30 0000842517 isba:VulnerableMember isba:AgriculturalMortgagePortfolioSegmentMember 2025-09-30 0000842517 us-gaap:DoubtfulMember isba:AgriculturalMortgagePortfolioSegmentMember 2025-09-30 0000842517 isba:LossMember isba:AgriculturalMortgagePortfolioSegmentMember 2025-09-30 0000842517 isba:AgriculturalMortgagePortfolioSegmentMember 2025-01-01 2025-09-30 0000842517 isba:RiskRatings13Member isba:AgriculturalOtherPortfolioSegmentMember 2025-09-30 0000842517 isba:LowSatisfactoryMember isba:AgriculturalOtherPortfolioSegmentMember 2025-09-30 0000842517 us-gaap:SpecialMentionMember isba:AgriculturalOtherPortfolioSegmentMember 2025-09-30 0000842517 us-gaap:SubstandardMember isba:AgriculturalOtherPortfolioSegmentMember 2025-09-30 0000842517 isba:VulnerableMember isba:AgriculturalOtherPortfolioSegmentMember 2025-09-30 0000842517 us-gaap:DoubtfulMember isba:AgriculturalOtherPortfolioSegmentMember 2025-09-30 0000842517 isba:LossMember isba:AgriculturalOtherPortfolioSegmentMember 2025-09-30 0000842517 isba:AgriculturalOtherPortfolioSegmentMember 2025-01-01 2025-09-30 0000842517 isba:RiskRatings13Member isba:CommercialAndIndustrialSecuredPortfolioSegmentMember 2024-12-31 0000842517 isba:LowSatisfactoryMember isba:CommercialAndIndustrialSecuredPortfolioSegmentMember 2024-12-31 0000842517 us-gaap:SpecialMentionMember isba:CommercialAndIndustrialSecuredPortfolioSegmentMember 2024-12-31 0000842517 us-gaap:SubstandardMember isba:CommercialAndIndustrialSecuredPortfolioSegmentMember 2024-12-31 0000842517 isba:VulnerableMember isba:CommercialAndIndustrialSecuredPortfolioSegmentMember 2024-12-31 0000842517 us-gaap:DoubtfulMember isba:CommercialAndIndustrialSecuredPortfolioSegmentMember 2024-12-31 0000842517 isba:LossMember isba:CommercialAndIndustrialSecuredPortfolioSegmentMember 2024-12-31 0000842517 isba:CommercialAndIndustrialSecuredPortfolioSegmentMember 2024-01-01 2024-12-31 0000842517 isba:RiskRatings13Member isba:CommercialAndIndustrialUnsecuredPortfolioSegmentMember 2024-12-31 0000842517 isba:LowSatisfactoryMember isba:CommercialAndIndustrialUnsecuredPortfolioSegmentMember 2024-12-31 0000842517 us-gaap:SpecialMentionMember isba:CommercialAndIndustrialUnsecuredPortfolioSegmentMember 2024-12-31 0000842517 us-gaap:SubstandardMember isba:CommercialAndIndustrialUnsecuredPortfolioSegmentMember 2024-12-31 0000842517 isba:VulnerableMember isba:CommercialAndIndustrialUnsecuredPortfolioSegmentMember 2024-12-31 0000842517 us-gaap:DoubtfulMember isba:CommercialAndIndustrialUnsecuredPortfolioSegmentMember 2024-12-31 0000842517 isba:LossMember isba:CommercialAndIndustrialUnsecuredPortfolioSegmentMember 2024-12-31 0000842517 isba:CommercialAndIndustrialUnsecuredPortfolioSegmentMember 2024-01-01 2024-12-31 0000842517 isba:RiskRatings13Member isba:CommercialRealEstateOwnerOccupiedPortfolioSegmentMember 2024-12-31 0000842517 isba:LowSatisfactoryMember isba:CommercialRealEstateOwnerOccupiedPortfolioSegmentMember 2024-12-31 0000842517 us-gaap:SpecialMentionMember isba:CommercialRealEstateOwnerOccupiedPortfolioSegmentMember 2024-12-31 0000842517 us-gaap:SubstandardMember isba:CommercialRealEstateOwnerOccupiedPortfolioSegmentMember 2024-12-31 0000842517 isba:VulnerableMember isba:CommercialRealEstateOwnerOccupiedPortfolioSegmentMember 2024-12-31 0000842517 us-gaap:DoubtfulMember isba:CommercialRealEstateOwnerOccupiedPortfolioSegmentMember 2024-12-31 0000842517 isba:LossMember isba:CommercialRealEstateOwnerOccupiedPortfolioSegmentMember 2024-12-31 0000842517 isba:CommercialRealEstateOwnerOccupiedPortfolioSegmentMember 2024-01-01 2024-12-31 0000842517 isba:RiskRatings13Member isba:CommercialRealEstateNonOwnerOccupiedMember 2024-12-31 0000842517 isba:LowSatisfactoryMember isba:CommercialRealEstateNonOwnerOccupiedMember 2024-12-31 0000842517 us-gaap:SpecialMentionMember isba:CommercialRealEstateNonOwnerOccupiedMember 2024-12-31 0000842517 us-gaap:SubstandardMember isba:CommercialRealEstateNonOwnerOccupiedMember 2024-12-31 0000842517 isba:VulnerableMember isba:CommercialRealEstateNonOwnerOccupiedMember 2024-12-31 0000842517 us-gaap:DoubtfulMember isba:CommercialRealEstateNonOwnerOccupiedMember 2024-12-31 0000842517 isba:LossMember isba:CommercialRealEstateNonOwnerOccupiedMember 2024-12-31 0000842517 isba:CommercialRealEstateNonOwnerOccupiedMember 2024-01-01 2024-12-31 0000842517 isba:RiskRatings13Member isba:CommercialRealEstate14FamilyInvestorPortfolioSegmentMember 2024-12-31 0000842517 isba:LowSatisfactoryMember isba:CommercialRealEstate14FamilyInvestorPortfolioSegmentMember 2024-12-31 0000842517 us-gaap:SpecialMentionMember isba:CommercialRealEstate14FamilyInvestorPortfolioSegmentMember 2024-12-31 0000842517 us-gaap:SubstandardMember isba:CommercialRealEstate14FamilyInvestorPortfolioSegmentMember 2024-12-31 0000842517 isba:VulnerableMember isba:CommercialRealEstate14FamilyInvestorPortfolioSegmentMember 2024-12-31 0000842517 us-gaap:DoubtfulMember isba:CommercialRealEstate14FamilyInvestorPortfolioSegmentMember 2024-12-31 0000842517 isba:LossMember isba:CommercialRealEstate14FamilyInvestorPortfolioSegmentMember 2024-12-31 0000842517 isba:CommercialRealEstate14FamilyInvestorPortfolioSegmentMember 2024-01-01 2024-12-31 0000842517 isba:RiskRatings13Member isba:CommercialRealEstateMultifamilyPortfolioSegmentMember 2024-12-31 0000842517 isba:LowSatisfactoryMember isba:CommercialRealEstateMultifamilyPortfolioSegmentMember 2024-12-31 0000842517 us-gaap:SpecialMentionMember isba:CommercialRealEstateMultifamilyPortfolioSegmentMember 2024-12-31 0000842517 us-gaap:SubstandardMember isba:CommercialRealEstateMultifamilyPortfolioSegmentMember 2024-12-31 0000842517 isba:VulnerableMember isba:CommercialRealEstateMultifamilyPortfolioSegmentMember 2024-12-31 0000842517 us-gaap:DoubtfulMember isba:CommercialRealEstateMultifamilyPortfolioSegmentMember 2024-12-31 0000842517 isba:LossMember isba:CommercialRealEstateMultifamilyPortfolioSegmentMember 2024-12-31 0000842517 isba:CommercialRealEstateMultifamilyPortfolioSegmentMember 2024-01-01 2024-12-31 0000842517 isba:RiskRatings13Member isba:CommercialAdvancestoMortgageBrokersSegmentMember 2024-12-31 0000842517 isba:CommercialAdvancestoMortgageBrokersSegmentMember 2024-01-01 2024-12-31 0000842517 isba:RiskRatings13Member isba:AgriculturalMortgagePortfolioSegmentMember 2024-12-31 0000842517 isba:LowSatisfactoryMember isba:AgriculturalMortgagePortfolioSegmentMember 2024-12-31 0000842517 us-gaap:SpecialMentionMember isba:AgriculturalMortgagePortfolioSegmentMember 2024-12-31 0000842517 us-gaap:SubstandardMember isba:AgriculturalMortgagePortfolioSegmentMember 2024-12-31 0000842517 isba:VulnerableMember isba:AgriculturalMortgagePortfolioSegmentMember 2024-12-31 0000842517 us-gaap:DoubtfulMember isba:AgriculturalMortgagePortfolioSegmentMember 2024-12-31 0000842517 isba:LossMember isba:AgriculturalMortgagePortfolioSegmentMember 2024-12-31 0000842517 isba:AgriculturalMortgagePortfolioSegmentMember 2024-01-01 2024-12-31 0000842517 isba:RiskRatings13Member isba:AgriculturalOtherPortfolioSegmentMember 2024-12-31 0000842517 isba:LowSatisfactoryMember isba:AgriculturalOtherPortfolioSegmentMember 2024-12-31 0000842517 us-gaap:SpecialMentionMember isba:AgriculturalOtherPortfolioSegmentMember 2024-12-31 0000842517 us-gaap:SubstandardMember isba:AgriculturalOtherPortfolioSegmentMember 2024-12-31 0000842517 isba:VulnerableMember isba:AgriculturalOtherPortfolioSegmentMember 2024-12-31 0000842517 us-gaap:DoubtfulMember isba:AgriculturalOtherPortfolioSegmentMember 2024-12-31 0000842517 isba:LossMember isba:AgriculturalOtherPortfolioSegmentMember 2024-12-31 0000842517 isba:AgriculturalOtherPortfolioSegmentMember 2024-01-01 2024-12-31 0000842517 srt:MinimumMember isba:LowSatisfactoryMember 2025-01-01 2025-09-30 0000842517 srt:MaximumMember isba:LowSatisfactoryMember 2025-01-01 2025-09-30 0000842517 srt:MinimumMember us-gaap:SpecialMentionMember 2025-09-30 0000842517 srt:MaximumMember us-gaap:SpecialMentionMember 2025-09-30 0000842517 isba:FinancialAssets30To89DaysPastDueMember isba:ResidentialRealEstateSeniorLienPortfolioSegmentMember 2025-09-30 0000842517 us-gaap:NonperformingFinancingReceivableMember isba:ResidentialRealEstateSeniorLienPortfolioSegmentMember 2025-09-30 0000842517 isba:ResidentialRealEstateSeniorLienPortfolioSegmentMember 2025-01-01 2025-09-30 0000842517 isba:FinancialAssets30To89DaysPastDueMember isba:ResidentialRealEstateJuniorLienPortfolioSegmentMember 2025-09-30 0000842517 us-gaap:NonperformingFinancingReceivableMember isba:ResidentialRealEstateJuniorLienPortfolioSegmentMember 2025-09-30 0000842517 isba:ResidentialRealEstateJuniorLienPortfolioSegmentMember 2025-01-01 2025-09-30 0000842517 isba:FinancialAssets30To89DaysPastDueMember isba:ResidentialRealEstateHomeEquityLinesOfCreditPortfolioSegmentMember 2025-09-30 0000842517 us-gaap:NonperformingFinancingReceivableMember isba:ResidentialRealEstateHomeEquityLinesOfCreditPortfolioSegmentMember 2025-09-30 0000842517 isba:ResidentialRealEstateHomeEquityLinesOfCreditPortfolioSegmentMember 2025-01-01 2025-09-30 0000842517 isba:FinancialAssets30To89DaysPastDueMember isba:ConsumerSecuredDirectPortfolioSegmentMember 2025-09-30 0000842517 us-gaap:NonperformingFinancingReceivableMember isba:ConsumerSecuredDirectPortfolioSegmentMember 2025-09-30 0000842517 isba:ConsumerSecuredDirectPortfolioSegmentMember 2025-01-01 2025-09-30 0000842517 isba:FinancialAssets30To89DaysPastDueMember isba:ConsumerSecuredIndirectPortfolioSegmentMember 2025-09-30 0000842517 us-gaap:NonperformingFinancingReceivableMember isba:ConsumerSecuredIndirectPortfolioSegmentMember 2025-09-30 0000842517 isba:ConsumerSecuredIndirectPortfolioSegmentMember 2025-01-01 2025-09-30 0000842517 isba:FinancialAssets30To89DaysPastDueMember isba:ConsumerUnsecuredPortfolioSegmentMember 2025-09-30 0000842517 us-gaap:NonperformingFinancingReceivableMember isba:ConsumerUnsecuredPortfolioSegmentMember 2025-09-30 0000842517 isba:ConsumerUnsecuredPortfolioSegmentMember 2025-01-01 2025-09-30 0000842517 isba:FinancialAssets30To89DaysPastDueMember isba:ResidentialRealEstateSeniorLienPortfolioSegmentMember 2024-12-31 0000842517 us-gaap:NonperformingFinancingReceivableMember isba:ResidentialRealEstateSeniorLienPortfolioSegmentMember 2024-12-31 0000842517 isba:ResidentialRealEstateSeniorLienPortfolioSegmentMember 2024-01-01 2024-12-31 0000842517 isba:FinancialAssets30To89DaysPastDueMember isba:ResidentialRealEstateJuniorLienPortfolioSegmentMember 2024-12-31 0000842517 us-gaap:NonperformingFinancingReceivableMember isba:ResidentialRealEstateJuniorLienPortfolioSegmentMember 2024-12-31 0000842517 isba:ResidentialRealEstateJuniorLienPortfolioSegmentMember 2024-01-01 2024-12-31 0000842517 isba:FinancialAssets30To89DaysPastDueMember isba:ResidentialRealEstateHomeEquityLinesOfCreditPortfolioSegmentMember 2024-12-31 0000842517 us-gaap:NonperformingFinancingReceivableMember isba:ResidentialRealEstateHomeEquityLinesOfCreditPortfolioSegmentMember 2024-12-31 0000842517 isba:ResidentialRealEstateHomeEquityLinesOfCreditPortfolioSegmentMember 2024-01-01 2024-12-31 0000842517 isba:FinancialAssets30To89DaysPastDueMember isba:ConsumerSecuredDirectPortfolioSegmentMember 2024-12-31 0000842517 us-gaap:NonperformingFinancingReceivableMember isba:ConsumerSecuredDirectPortfolioSegmentMember 2024-12-31 0000842517 isba:ConsumerSecuredDirectPortfolioSegmentMember 2024-01-01 2024-12-31 0000842517 isba:FinancialAssets30To89DaysPastDueMember isba:ConsumerSecuredIndirectPortfolioSegmentMember 2024-12-31 0000842517 us-gaap:NonperformingFinancingReceivableMember isba:ConsumerSecuredIndirectPortfolioSegmentMember 2024-12-31 0000842517 isba:ConsumerSecuredIndirectPortfolioSegmentMember 2024-01-01 2024-12-31 0000842517 isba:FinancialAssets30To89DaysPastDueMember isba:ConsumerUnsecuredPortfolioSegmentMember 2024-12-31 0000842517 us-gaap:NonperformingFinancingReceivableMember isba:ConsumerUnsecuredPortfolioSegmentMember 2024-12-31 0000842517 isba:ConsumerUnsecuredPortfolioSegmentMember 2024-01-01 2024-12-31 0000842517 isba:CommercialAndIndustrialSecuredPortfolioSegmentMember us-gaap:PaymentDeferralMember 2025-07-01 2025-09-30 0000842517 isba:CommercialAndIndustrialSecuredPortfolioSegmentMember us-gaap:ExtendedMaturityMember 2025-07-01 2025-09-30 0000842517 isba:CommercialAndIndustrialSecuredPortfolioSegmentMember isba:ExtendedMaturityAndPaymentDeferralMember 2025-07-01 2025-09-30 0000842517 isba:AgriculturalMortgagePortfolioSegmentMember us-gaap:PaymentDeferralMember 2025-07-01 2025-09-30 0000842517 isba:AgriculturalMortgagePortfolioSegmentMember us-gaap:ExtendedMaturityMember 2025-07-01 2025-09-30 0000842517 isba:AgriculturalMortgagePortfolioSegmentMember isba:ExtendedMaturityAndPaymentDeferralMember 2025-07-01 2025-09-30 0000842517 isba:AgriculturalOtherPortfolioSegmentMember us-gaap:PaymentDeferralMember 2025-07-01 2025-09-30 0000842517 isba:AgriculturalOtherPortfolioSegmentMember us-gaap:ExtendedMaturityMember 2025-07-01 2025-09-30 0000842517 isba:AgriculturalOtherPortfolioSegmentMember isba:ExtendedMaturityAndPaymentDeferralMember 2025-07-01 2025-09-30 0000842517 us-gaap:PaymentDeferralMember 2025-07-01 2025-09-30 0000842517 us-gaap:ExtendedMaturityMember 2025-07-01 2025-09-30 0000842517 isba:ExtendedMaturityAndPaymentDeferralMember 2025-07-01 2025-09-30 0000842517 isba:CommercialAndIndustrialSecuredPortfolioSegmentMember us-gaap:InterestRateBelowMarketReductionMember 2025-01-01 2025-09-30 0000842517 isba:CommercialAndIndustrialSecuredPortfolioSegmentMember us-gaap:PaymentDeferralMember 2025-01-01 2025-09-30 0000842517 isba:CommercialAndIndustrialSecuredPortfolioSegmentMember us-gaap:ExtendedMaturityMember 2025-01-01 2025-09-30 0000842517 isba:CommercialAndIndustrialSecuredPortfolioSegmentMember isba:ExtendedMaturityAndPaymentDeferralMember 2025-01-01 2025-09-30 0000842517 isba:CommercialRealEstateOwnerOccupiedPortfolioSegmentMember us-gaap:InterestRateBelowMarketReductionMember 2025-01-01 2025-09-30 0000842517 isba:CommercialRealEstateOwnerOccupiedPortfolioSegmentMember us-gaap:PaymentDeferralMember 2025-01-01 2025-09-30 0000842517 isba:CommercialRealEstateOwnerOccupiedPortfolioSegmentMember us-gaap:ExtendedMaturityMember 2025-01-01 2025-09-30 0000842517 isba:CommercialRealEstateOwnerOccupiedPortfolioSegmentMember isba:ExtendedMaturityAndPaymentDeferralMember 2025-01-01 2025-09-30 0000842517 isba:AgriculturalMortgagePortfolioSegmentMember us-gaap:InterestRateBelowMarketReductionMember 2025-01-01 2025-09-30 0000842517 isba:AgriculturalMortgagePortfolioSegmentMember us-gaap:PaymentDeferralMember 2025-01-01 2025-09-30 0000842517 isba:AgriculturalMortgagePortfolioSegmentMember us-gaap:ExtendedMaturityMember 2025-01-01 2025-09-30 0000842517 isba:AgriculturalMortgagePortfolioSegmentMember isba:ExtendedMaturityAndPaymentDeferralMember 2025-01-01 2025-09-30 0000842517 isba:AgriculturalOtherPortfolioSegmentMember us-gaap:InterestRateBelowMarketReductionMember 2025-01-01 2025-09-30 0000842517 isba:AgriculturalOtherPortfolioSegmentMember us-gaap:PaymentDeferralMember 2025-01-01 2025-09-30 0000842517 isba:AgriculturalOtherPortfolioSegmentMember us-gaap:ExtendedMaturityMember 2025-01-01 2025-09-30 0000842517 isba:AgriculturalOtherPortfolioSegmentMember isba:ExtendedMaturityAndPaymentDeferralMember 2025-01-01 2025-09-30 0000842517 us-gaap:InterestRateBelowMarketReductionMember 2025-01-01 2025-09-30 0000842517 us-gaap:PaymentDeferralMember 2025-01-01 2025-09-30 0000842517 us-gaap:ExtendedMaturityMember 2025-01-01 2025-09-30 0000842517 isba:ExtendedMaturityAndPaymentDeferralMember 2025-01-01 2025-09-30 0000842517 isba:AgriculturalOtherPortfolioSegmentMember us-gaap:InterestRateBelowMarketReductionMember 2024-07-01 2024-09-30 0000842517 us-gaap:InterestRateBelowMarketReductionMember 2024-07-01 2024-09-30 0000842517 isba:CommercialAndIndustrialSecuredPortfolioSegmentMember us-gaap:InterestRateBelowMarketReductionMember 2024-01-01 2024-09-30 0000842517 isba:CommercialAndIndustrialSecuredPortfolioSegmentMember us-gaap:PaymentDeferralMember 2024-01-01 2024-09-30 0000842517 isba:CommercialAndIndustrialSecuredPortfolioSegmentMember us-gaap:ExtendedMaturityMember 2024-01-01 2024-09-30 0000842517 isba:CommercialAndIndustrialSecuredPortfolioSegmentMember isba:ExtendedMaturityAndPaymentDeferralMember 2024-01-01 2024-09-30 0000842517 isba:CommercialRealEstateOwnerOccupiedPortfolioSegmentMember us-gaap:InterestRateBelowMarketReductionMember 2024-01-01 2024-09-30 0000842517 isba:CommercialRealEstateOwnerOccupiedPortfolioSegmentMember us-gaap:PaymentDeferralMember 2024-01-01 2024-09-30 0000842517 isba:CommercialRealEstateOwnerOccupiedPortfolioSegmentMember us-gaap:ExtendedMaturityMember 2024-01-01 2024-09-30 0000842517 isba:CommercialRealEstateOwnerOccupiedPortfolioSegmentMember isba:ExtendedMaturityAndPaymentDeferralMember 2024-01-01 2024-09-30 0000842517 isba:AgriculturalMortgagePortfolioSegmentMember us-gaap:InterestRateBelowMarketReductionMember 2024-01-01 2024-09-30 0000842517 isba:AgriculturalMortgagePortfolioSegmentMember us-gaap:PaymentDeferralMember 2024-01-01 2024-09-30 0000842517 isba:AgriculturalMortgagePortfolioSegmentMember us-gaap:ExtendedMaturityMember 2024-01-01 2024-09-30 0000842517 isba:AgriculturalMortgagePortfolioSegmentMember isba:ExtendedMaturityAndPaymentDeferralMember 2024-01-01 2024-09-30 0000842517 isba:AgriculturalOtherPortfolioSegmentMember us-gaap:InterestRateBelowMarketReductionMember 2024-01-01 2024-09-30 0000842517 isba:AgriculturalOtherPortfolioSegmentMember us-gaap:PaymentDeferralMember 2024-01-01 2024-09-30 0000842517 isba:AgriculturalOtherPortfolioSegmentMember us-gaap:ExtendedMaturityMember 2024-01-01 2024-09-30 0000842517 isba:AgriculturalOtherPortfolioSegmentMember isba:ExtendedMaturityAndPaymentDeferralMember 2024-01-01 2024-09-30 0000842517 isba:ConsumerSecuredIndirectPortfolioSegmentMember us-gaap:InterestRateBelowMarketReductionMember 2024-01-01 2024-09-30 0000842517 isba:ConsumerSecuredIndirectPortfolioSegmentMember us-gaap:PaymentDeferralMember 2024-01-01 2024-09-30 0000842517 isba:ConsumerSecuredIndirectPortfolioSegmentMember us-gaap:ExtendedMaturityMember 2024-01-01 2024-09-30 0000842517 isba:ConsumerSecuredIndirectPortfolioSegmentMember isba:ExtendedMaturityAndPaymentDeferralMember 2024-01-01 2024-09-30 0000842517 us-gaap:InterestRateBelowMarketReductionMember 2024-01-01 2024-09-30 0000842517 us-gaap:PaymentDeferralMember 2024-01-01 2024-09-30 0000842517 us-gaap:ExtendedMaturityMember 2024-01-01 2024-09-30 0000842517 isba:ExtendedMaturityAndPaymentDeferralMember 2024-01-01 2024-09-30 0000842517 us-gaap:FinancialAssetNotPastDueMember isba:CommercialAndIndustrialSecuredPortfolioSegmentMember 2024-09-30 0000842517 us-gaap:FinancingReceivables30To59DaysPastDueMember isba:CommercialAndIndustrialSecuredPortfolioSegmentMember 2024-09-30 0000842517 us-gaap:FinancingReceivables60To89DaysPastDueMember isba:CommercialAndIndustrialSecuredPortfolioSegmentMember 2024-09-30 0000842517 us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember isba:CommercialAndIndustrialSecuredPortfolioSegmentMember 2024-09-30 0000842517 isba:CommercialAndIndustrialSecuredPortfolioSegmentMember 2024-09-30 0000842517 us-gaap:FinancialAssetNotPastDueMember isba:CommercialRealEstateOwnerOccupiedPortfolioSegmentMember 2024-09-30 0000842517 us-gaap:FinancingReceivables30To59DaysPastDueMember isba:CommercialRealEstateOwnerOccupiedPortfolioSegmentMember 2024-09-30 0000842517 us-gaap:FinancingReceivables60To89DaysPastDueMember isba:CommercialRealEstateOwnerOccupiedPortfolioSegmentMember 2024-09-30 0000842517 us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember isba:CommercialRealEstateOwnerOccupiedPortfolioSegmentMember 2024-09-30 0000842517 isba:CommercialRealEstateOwnerOccupiedPortfolioSegmentMember 2024-09-30 0000842517 us-gaap:FinancialAssetNotPastDueMember isba:CommercialRealEstateMultifamilyPortfolioSegmentMember 2024-09-30 0000842517 us-gaap:FinancingReceivables30To59DaysPastDueMember isba:CommercialRealEstateMultifamilyPortfolioSegmentMember 2024-09-30 0000842517 us-gaap:FinancingReceivables60To89DaysPastDueMember isba:CommercialRealEstateMultifamilyPortfolioSegmentMember 2024-09-30 0000842517 us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember isba:CommercialRealEstateMultifamilyPortfolioSegmentMember 2024-09-30 0000842517 isba:CommercialRealEstateMultifamilyPortfolioSegmentMember 2024-09-30 0000842517 us-gaap:FinancialAssetNotPastDueMember isba:AgriculturalMortgagePortfolioSegmentMember 2024-09-30 0000842517 us-gaap:FinancingReceivables30To59DaysPastDueMember isba:AgriculturalMortgagePortfolioSegmentMember 2024-09-30 0000842517 us-gaap:FinancingReceivables60To89DaysPastDueMember isba:AgriculturalMortgagePortfolioSegmentMember 2024-09-30 0000842517 us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember isba:AgriculturalMortgagePortfolioSegmentMember 2024-09-30 0000842517 isba:AgriculturalMortgagePortfolioSegmentMember 2024-09-30 0000842517 us-gaap:FinancialAssetNotPastDueMember isba:AgriculturalOtherPortfolioSegmentMember 2024-09-30 0000842517 us-gaap:FinancingReceivables30To59DaysPastDueMember isba:AgriculturalOtherPortfolioSegmentMember 2024-09-30 0000842517 us-gaap:FinancingReceivables60To89DaysPastDueMember isba:AgriculturalOtherPortfolioSegmentMember 2024-09-30 0000842517 us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember isba:AgriculturalOtherPortfolioSegmentMember 2024-09-30 0000842517 isba:AgriculturalOtherPortfolioSegmentMember 2024-09-30 0000842517 us-gaap:FinancialAssetNotPastDueMember isba:ConsumerSecuredIndirectPortfolioSegmentMember 2024-09-30 0000842517 us-gaap:FinancingReceivables30To59DaysPastDueMember isba:ConsumerSecuredIndirectPortfolioSegmentMember 2024-09-30 0000842517 us-gaap:FinancingReceivables60To89DaysPastDueMember isba:ConsumerSecuredIndirectPortfolioSegmentMember 2024-09-30 0000842517 us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember isba:ConsumerSecuredIndirectPortfolioSegmentMember 2024-09-30 0000842517 isba:ConsumerSecuredIndirectPortfolioSegmentMember 2024-09-30 0000842517 us-gaap:FinancialAssetNotPastDueMember 2024-09-30 0000842517 us-gaap:FinancingReceivables30To59DaysPastDueMember 2024-09-30 0000842517 us-gaap:FinancingReceivables60To89DaysPastDueMember 2024-09-30 0000842517 us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember 2024-09-30 0000842517 us-gaap:CommercialPortfolioSegmentMember 2025-06-30 0000842517 us-gaap:CommercialRealEstateMember 2025-06-30 0000842517 isba:AgriculturalPortfolioSegmentMember 2025-06-30 0000842517 us-gaap:ResidentialMortgageMember 2025-06-30 0000842517 us-gaap:ConsumerPortfolioSegmentMember 2025-06-30 0000842517 us-gaap:CommercialPortfolioSegmentMember 2025-07-01 2025-09-30 0000842517 us-gaap:CommercialRealEstateMember 2025-07-01 2025-09-30 0000842517 isba:AgriculturalPortfolioSegmentMember 2025-07-01 2025-09-30 0000842517 us-gaap:ResidentialMortgageMember 2025-07-01 2025-09-30 0000842517 us-gaap:ConsumerPortfolioSegmentMember 2025-07-01 2025-09-30 0000842517 us-gaap:CommercialPortfolioSegmentMember 2025-01-01 2025-09-30 0000842517 us-gaap:CommercialRealEstateMember 2025-01-01 2025-09-30 0000842517 isba:AgriculturalPortfolioSegmentMember 2025-01-01 2025-09-30 0000842517 us-gaap:ResidentialMortgageMember 2025-01-01 2025-09-30 0000842517 us-gaap:ConsumerPortfolioSegmentMember 2025-01-01 2025-09-30 0000842517 us-gaap:CommercialPortfolioSegmentMember 2024-06-30 0000842517 us-gaap:CommercialRealEstateMember 2024-06-30 0000842517 isba:AgriculturalPortfolioSegmentMember 2024-06-30 0000842517 us-gaap:ResidentialMortgageMember 2024-06-30 0000842517 us-gaap:ConsumerPortfolioSegmentMember 2024-06-30 0000842517 us-gaap:CommercialPortfolioSegmentMember 2024-07-01 2024-09-30 0000842517 us-gaap:CommercialRealEstateMember 2024-07-01 2024-09-30 0000842517 isba:AgriculturalPortfolioSegmentMember 2024-07-01 2024-09-30 0000842517 us-gaap:ResidentialMortgageMember 2024-07-01 2024-09-30 0000842517 us-gaap:ConsumerPortfolioSegmentMember 2024-07-01 2024-09-30 0000842517 us-gaap:CommercialPortfolioSegmentMember 2024-09-30 0000842517 us-gaap:CommercialRealEstateMember 2024-09-30 0000842517 isba:AgriculturalPortfolioSegmentMember 2024-09-30 0000842517 us-gaap:ResidentialMortgageMember 2024-09-30 0000842517 us-gaap:ConsumerPortfolioSegmentMember 2024-09-30 0000842517 us-gaap:CommercialPortfolioSegmentMember 2023-12-31 0000842517 us-gaap:CommercialRealEstateMember 2023-12-31 0000842517 isba:AgriculturalPortfolioSegmentMember 2023-12-31 0000842517 us-gaap:ResidentialMortgageMember 2023-12-31 0000842517 us-gaap:ConsumerPortfolioSegmentMember 2023-12-31 0000842517 us-gaap:CommercialPortfolioSegmentMember 2024-01-01 2024-09-30 0000842517 us-gaap:CommercialRealEstateMember 2024-01-01 2024-09-30 0000842517 isba:AgriculturalPortfolioSegmentMember 2024-01-01 2024-09-30 0000842517 us-gaap:ResidentialMortgageMember 2024-01-01 2024-09-30 0000842517 us-gaap:ConsumerPortfolioSegmentMember 2024-01-01 2024-09-30 0000842517 2025-03-31 0000842517 us-gaap:CollateralPledgedMember us-gaap:CommercialPortfolioSegmentMember 2025-09-30 0000842517 us-gaap:CollateralPledgedMember us-gaap:CommercialPortfolioSegmentMember 2024-12-31 0000842517 us-gaap:CollateralPledgedMember us-gaap:CommercialRealEstateMember 2025-09-30 0000842517 us-gaap:CollateralPledgedMember us-gaap:CommercialRealEstateMember 2024-12-31 0000842517 us-gaap:CollateralPledgedMember isba:AgriculturalPortfolioSegmentMember 2025-09-30 0000842517 us-gaap:CollateralPledgedMember isba:AgriculturalPortfolioSegmentMember 2024-12-31 0000842517 us-gaap:CollateralPledgedMember us-gaap:ResidentialMortgageMember 2025-09-30 0000842517 us-gaap:CollateralPledgedMember us-gaap:ResidentialMortgageMember 2024-12-31 0000842517 us-gaap:CollateralPledgedMember us-gaap:ConsumerPortfolioSegmentMember 2025-09-30 0000842517 us-gaap:CollateralPledgedMember us-gaap:ConsumerPortfolioSegmentMember 2024-12-31 0000842517 us-gaap:CollateralPledgedMember 2025-09-30 0000842517 us-gaap:CollateralPledgedMember 2024-12-31 0000842517 us-gaap:SecuritiesSoldUnderAgreementsToRepurchaseMember 2025-07-01 2025-09-30 0000842517 us-gaap:SecuritiesSoldUnderAgreementsToRepurchaseMember 2024-07-01 2024-09-30 0000842517 us-gaap:FederalFundsPurchasedMember 2025-07-01 2025-09-30 0000842517 us-gaap:FederalFundsPurchasedMember 2024-07-01 2024-09-30 0000842517 us-gaap:FederalReserveBankAdvancesMember 2025-07-01 2025-09-30 0000842517 us-gaap:FederalReserveBankAdvancesMember 2024-07-01 2024-09-30 0000842517 us-gaap:SecuritiesSoldUnderAgreementsToRepurchaseMember 2025-01-01 2025-09-30 0000842517 us-gaap:SecuritiesSoldUnderAgreementsToRepurchaseMember 2024-01-01 2024-09-30 0000842517 us-gaap:FederalFundsPurchasedMember 2025-01-01 2025-09-30 0000842517 us-gaap:FederalFundsPurchasedMember 2024-01-01 2024-09-30 0000842517 us-gaap:FederalReserveBankAdvancesMember 2025-01-01 2025-09-30 0000842517 us-gaap:FederalReserveBankAdvancesMember 2024-01-01 2024-09-30 0000842517 us-gaap:SecuritiesSoldUnderAgreementsToRepurchaseMember 2025-09-30 0000842517 us-gaap:SecuritiesSoldUnderAgreementsToRepurchaseMember 2024-12-31 0000842517 us-gaap:USTreasurySecuritiesMember 2025-09-30 0000842517 us-gaap:USTreasurySecuritiesMember 2024-12-31 0000842517 us-gaap:MortgageBackedSecuritiesOtherMember 2025-09-30 0000842517 us-gaap:MortgageBackedSecuritiesOtherMember 2024-12-31 0000842517 us-gaap:CollateralizedMortgageObligationsMember 2025-09-30 0000842517 us-gaap:CollateralizedMortgageObligationsMember 2024-12-31 0000842517 isba:FederalHomeLoanBankAdvancesFixedRateDue2025Member 2025-09-30 0000842517 isba:FederalHomeLoanBankAdvancesFixedRateDue2025Member 2024-12-31 0000842517 us-gaap:SubordinatedDebtMember 2025-09-30 0000842517 us-gaap:SubordinatedDebtMember 2025-01-01 2025-09-30 0000842517 us-gaap:SubordinatedDebtMember 2024-12-31 0000842517 2024-01-01 2024-12-31 0000842517 srt:SubsidiariesMember 2025-09-30 0000842517 srt:SubsidiariesMember 2024-12-31 0000842517 us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember 2025-06-30 0000842517 us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember 2025-06-30 0000842517 us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember 2024-06-30 0000842517 us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember 2024-06-30 0000842517 us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember 2025-07-01 2025-09-30 0000842517 us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember 2025-07-01 2025-09-30 0000842517 us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember 2024-07-01 2024-09-30 0000842517 us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember 2024-07-01 2024-09-30 0000842517 us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember 2025-09-30 0000842517 us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember 2025-09-30 0000842517 us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember 2024-09-30 0000842517 us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember 2024-09-30 0000842517 us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember 2024-12-31 0000842517 us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember 2024-12-31 0000842517 us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember 2023-12-31 0000842517 us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember 2023-12-31 0000842517 us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember 2025-01-01 2025-09-30 0000842517 us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember 2025-01-01 2025-09-30 0000842517 us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember 2024-01-01 2024-09-30 0000842517 us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember 2024-01-01 2024-09-30 0000842517 us-gaap:AuctionRateSecuritiesMember 2025-07-01 2025-09-30 0000842517 isba:AvailableforsaleSecuritiesExcludingAuctionRateMoneyMarketPreferredandPreferredStocksMember 2025-07-01 2025-09-30 0000842517 us-gaap:AuctionRateSecuritiesMember 2024-07-01 2024-09-30 0000842517 isba:AvailableforsaleSecuritiesExcludingAuctionRateMoneyMarketPreferredandPreferredStocksMember 2024-07-01 2024-09-30 0000842517 us-gaap:AuctionRateSecuritiesMember 2025-01-01 2025-09-30 0000842517 isba:AvailableforsaleSecuritiesExcludingAuctionRateMoneyMarketPreferredandPreferredStocksMember 2025-01-01 2025-09-30 0000842517 us-gaap:AuctionRateSecuritiesMember 2024-01-01 2024-09-30 0000842517 isba:AvailableforsaleSecuritiesExcludingAuctionRateMoneyMarketPreferredandPreferredStocksMember 2024-01-01 2024-09-30 0000842517 isba:DiscountedAppraisalValueValuationTechniqueMember us-gaap:FairValueInputsLevel3Member 2025-09-30 0000842517 isba:LoansReceivableCollateralizedByRealEstateMember us-gaap:FairValueInputsLevel3Member isba:DiscountedAppraisalValueValuationTechniqueMember 2025-01-01 2025-09-30 0000842517 isba:DiscountedAppraisalValueValuationTechniqueMember us-gaap:FairValueInputsLevel3Member 2024-12-31 0000842517 isba:LoansReceivableCollateralizedByRealEstateMember us-gaap:FairValueInputsLevel3Member isba:DiscountedAppraisalValueValuationTechniqueMember 2024-01-01 2024-12-31 0000842517 us-gaap:ValuationTechniqueDiscountedCashFlowMember us-gaap:FairValueInputsLevel3Member 2025-09-30 0000842517 us-gaap:FairValueMeasurementsNonrecurringMember us-gaap:FairValueInputsLevel3Member us-gaap:ValuationTechniqueDiscountedCashFlowMember 2025-01-01 2025-09-30 0000842517 us-gaap:ValuationTechniqueDiscountedCashFlowMember us-gaap:FairValueInputsLevel3Member 2024-12-31 0000842517 us-gaap:FairValueMeasurementsNonrecurringMember us-gaap:FairValueInputsLevel3Member us-gaap:ValuationTechniqueDiscountedCashFlowMember 2024-01-01 2024-12-31 0000842517 us-gaap:CarryingReportedAmountFairValueDisclosureMember 2025-09-30 0000842517 us-gaap:EstimateOfFairValueFairValueDisclosureMember 2025-09-30 0000842517 us-gaap:FairValueInputsLevel1Member 2025-09-30 0000842517 us-gaap:FairValueInputsLevel2Member 2025-09-30 0000842517 us-gaap:FairValueInputsLevel3Member 2025-09-30 0000842517 us-gaap:CarryingReportedAmountFairValueDisclosureMember 2024-12-31 0000842517 us-gaap:EstimateOfFairValueFairValueDisclosureMember 2024-12-31 0000842517 us-gaap:FairValueInputsLevel1Member 2024-12-31 0000842517 us-gaap:FairValueInputsLevel2Member 2024-12-31 0000842517 us-gaap:FairValueInputsLevel3Member 2024-12-31 0000842517 us-gaap:USTreasurySecuritiesMember us-gaap:FairValueMeasurementsRecurringMember 2025-09-30 0000842517 us-gaap:USTreasurySecuritiesMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel1Member 2025-09-30 0000842517 us-gaap:USTreasurySecuritiesMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel2Member 2025-09-30 0000842517 us-gaap:USTreasurySecuritiesMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel3Member 2025-09-30 0000842517 us-gaap:USTreasurySecuritiesMember us-gaap:FairValueMeasurementsRecurringMember 2024-12-31 0000842517 us-gaap:USTreasurySecuritiesMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel1Member 2024-12-31 0000842517 us-gaap:USTreasurySecuritiesMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel2Member 2024-12-31 0000842517 us-gaap:USTreasurySecuritiesMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel3Member 2024-12-31 0000842517 us-gaap:USStatesAndPoliticalSubdivisionsMember us-gaap:FairValueMeasurementsRecurringMember 2025-09-30 0000842517 us-gaap:USStatesAndPoliticalSubdivisionsMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel1Member 2025-09-30 0000842517 us-gaap:USStatesAndPoliticalSubdivisionsMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel2Member 2025-09-30 0000842517 us-gaap:USStatesAndPoliticalSubdivisionsMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel3Member 2025-09-30 0000842517 us-gaap:USStatesAndPoliticalSubdivisionsMember us-gaap:FairValueMeasurementsRecurringMember 2024-12-31 0000842517 us-gaap:USStatesAndPoliticalSubdivisionsMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel1Member 2024-12-31 0000842517 us-gaap:USStatesAndPoliticalSubdivisionsMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel2Member 2024-12-31 0000842517 us-gaap:USStatesAndPoliticalSubdivisionsMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel3Member 2024-12-31 0000842517 us-gaap:AuctionRatePreferredSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember 2025-09-30 0000842517 us-gaap:AuctionRatePreferredSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel1Member 2025-09-30 0000842517 us-gaap:AuctionRatePreferredSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel2Member 2025-09-30 0000842517 us-gaap:AuctionRatePreferredSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel3Member 2025-09-30 0000842517 us-gaap:AuctionRatePreferredSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember 2024-12-31 0000842517 us-gaap:AuctionRatePreferredSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel1Member 2024-12-31 0000842517 us-gaap:AuctionRatePreferredSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel2Member 2024-12-31 0000842517 us-gaap:AuctionRatePreferredSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel3Member 2024-12-31 0000842517 us-gaap:MortgageBackedSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember 2025-09-30 0000842517 us-gaap:MortgageBackedSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel1Member 2025-09-30 0000842517 us-gaap:MortgageBackedSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel2Member 2025-09-30 0000842517 us-gaap:MortgageBackedSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel3Member 2025-09-30 0000842517 us-gaap:MortgageBackedSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember 2024-12-31 0000842517 us-gaap:MortgageBackedSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel1Member 2024-12-31 0000842517 us-gaap:MortgageBackedSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel2Member 2024-12-31 0000842517 us-gaap:MortgageBackedSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel3Member 2024-12-31 0000842517 us-gaap:CollateralizedMortgageObligationsMember us-gaap:FairValueMeasurementsRecurringMember 2025-09-30 0000842517 us-gaap:CollateralizedMortgageObligationsMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel1Member 2025-09-30 0000842517 us-gaap:CollateralizedMortgageObligationsMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel2Member 2025-09-30 0000842517 us-gaap:CollateralizedMortgageObligationsMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel3Member 2025-09-30 0000842517 us-gaap:CollateralizedMortgageObligationsMember us-gaap:FairValueMeasurementsRecurringMember 2024-12-31 0000842517 us-gaap:CollateralizedMortgageObligationsMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel1Member 2024-12-31 0000842517 us-gaap:CollateralizedMortgageObligationsMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel2Member 2024-12-31 0000842517 us-gaap:CollateralizedMortgageObligationsMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel3Member 2024-12-31 0000842517 us-gaap:CorporateDebtSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember 2025-09-30 0000842517 us-gaap:CorporateDebtSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel1Member 2025-09-30 0000842517 us-gaap:CorporateDebtSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel2Member 2025-09-30 0000842517 us-gaap:CorporateDebtSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel3Member 2025-09-30 0000842517 us-gaap:CorporateDebtSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember 2024-12-31 0000842517 us-gaap:CorporateDebtSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel1Member 2024-12-31 0000842517 us-gaap:CorporateDebtSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel2Member 2024-12-31 0000842517 us-gaap:CorporateDebtSecuritiesMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel3Member 2024-12-31 0000842517 us-gaap:FairValueMeasurementsRecurringMember 2025-09-30 0000842517 us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel1Member 2025-09-30 0000842517 us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel2Member 2025-09-30 0000842517 us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel3Member 2025-09-30 0000842517 us-gaap:FairValueMeasurementsRecurringMember 2024-12-31 0000842517 us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel1Member 2024-12-31 0000842517 us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel2Member 2024-12-31 0000842517 us-gaap:FairValueMeasurementsRecurringMember us-gaap:FairValueInputsLevel3Member 2024-12-31 0000842517 us-gaap:FairValueMeasurementsNonrecurringMember 2025-09-30 0000842517 us-gaap:FairValueMeasurementsNonrecurringMember us-gaap:FairValueInputsLevel1Member 2025-09-30 0000842517 us-gaap:FairValueMeasurementsNonrecurringMember us-gaap:FairValueInputsLevel2Member 2025-09-30 0000842517 us-gaap:FairValueMeasurementsNonrecurringMember us-gaap:FairValueInputsLevel3Member 2025-09-30 0000842517 us-gaap:FairValueMeasurementsNonrecurringMember 2024-12-31 0000842517 us-gaap:FairValueMeasurementsNonrecurringMember us-gaap:FairValueInputsLevel1Member 2024-12-31 0000842517 us-gaap:FairValueMeasurementsNonrecurringMember us-gaap:FairValueInputsLevel2Member 2024-12-31 0000842517 us-gaap:FairValueMeasurementsNonrecurringMember us-gaap:FairValueInputsLevel3Member 2024-12-31 0000842517 isba:MortgageServicingRightsMember us-gaap:FairValueMeasurementsNonrecurringMember us-gaap:FairValueInputsLevel3Member 2025-07-01 2025-09-30 0000842517 isba:MortgageServicingRightsMember us-gaap:FairValueMeasurementsNonrecurringMember us-gaap:FairValueInputsLevel3Member 2025-01-01 2025-09-30 0000842517 isba:MortgageServicingRightsMember us-gaap:FairValueMeasurementsNonrecurringMember us-gaap:FairValueInputsLevel3Member 2024-07-01 2024-09-30 0000842517 isba:MortgageServicingRightsMember us-gaap:FairValueMeasurementsNonrecurringMember us-gaap:FairValueInputsLevel3Member 2024-01-01 2024-09-30 0000842517 isba:ForeclosedAssetMember us-gaap:FairValueMeasurementsNonrecurringMember us-gaap:FairValueInputsLevel3Member 2025-07-01 2025-09-30 0000842517 isba:ForeclosedAssetMember us-gaap:FairValueMeasurementsNonrecurringMember us-gaap:FairValueInputsLevel3Member 2025-01-01 2025-09-30 0000842517 isba:ForeclosedAssetMember us-gaap:FairValueMeasurementsNonrecurringMember us-gaap:FairValueInputsLevel3Member 2024-07-01 2024-09-30 0000842517 isba:ForeclosedAssetMember us-gaap:FairValueMeasurementsNonrecurringMember us-gaap:FairValueInputsLevel3Member 2024-01-01 2024-09-30
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

FORM 10-Q

☒ | Quarterly Report Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934

For the quarterly period ended September 30, 2025
or

☐ | Transition Report Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934

For the transition period from to
Commission File Number: 0-18415

Isabella Bank Corporation
(Exact name of registrant as specified in its charter)

Michigan |  | 38-2830092
(State or other jurisdiction of incorporation or organization) |  | (I.R.S. Employer Identification No.)
401 N. Main St | Mt. Pleasant | MI |  | 48858
(Address of principal executive offices) |  | (Zip code)

(989) 772-9471
(Registrant’s telephone number, including area code)
N/A
(Former name, former address and former fiscal year, if changed since last report)

Securities registered pursuant to Section 12(b) of the Act:

Title of each class | Trading Symbol(s) | Name of each exchange on which registered
Common stock, no par value per share | ISBA | The Nasdaq Stock Market LLC

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 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. ☒ Yes ☐ No
Indicate 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). ☒ Yes ☐ No
Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a 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.

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 complying 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 Rule 12b-2 of the Exchange Act). ☐ Yes ☒ No
The number of common shares outstanding of the registrant’s Common Stock (no par value) was 7,335,096 as of November 6, 2025.

Table of Contents
ISABELLA BANK CORPORATION
QUARTERLY REPORT ON FORM 10-Q
Table of Contents

PART I – FINANCIAL INFORMATION |  | 4
Item 1. |  | Financial Statements |  | 4
Item 2. |  | Management’s Discussion and Analysis of Financial Condition and Results of Operations |  | 40
Item 3. |  | Quantitative and Qualitative Disclosures About Market Risk |  | 54
Item 4. |  | Controls and Procedures |  | 54
PART II – OTHER INFORMATION |  | 55
Item 1. |  | Legal Proceedings |  | 55
Item 1A. |  | Risk Factors |  | 55
Item 2. |  | Unregistered Sales of Equity Securities and Use of Proceeds |  | 55
Item 3. |  | Defaults Upon Senior Securities |  | 55
Item 4. |  | Mine Safety Disclosures |  | 55
Item 5. |  | Other Information |  | 56
Item 6. |  | Exhibits |  | 56
SIGNATURES |  |  |  | 57

2

Table of Contents
Glossary of Acronyms and Abbreviations
The acronyms and abbreviations identified below may be used throughout this Quarterly Report on Form 10-Q for the three and nine-month periods ended September 30, 2025 or in our other SEC filings. You may find it helpful to refer back to this page while reading this report.

ACL: Allowance for credit losses |  | Freddie Mac: Federal Home Loan Mortgage Corporation
AFS: Available-for-sale |  | FTE: Fully taxable equivalent
ALCO: Asset-Liability Committee |  | GAAP: U.S. generally accepted accounting principles
AOCI: Accumulated other comprehensive income |  | HFS: Held-for-sale
ASC: FASB Accounting Standards Codification |  | IRR: Interest rate risk
ASU: FASB Accounting Standards Update |  | N/A: Not applicable
ATM: Automated teller machine |  | N/M: Not meaningful
AUM: Assets under management |  | NASDAQ: NASDAQ Stock Market Index
BOLI: Bank-owned life insurance |  | NAV: Net asset value
CECL: Current expected credit losses |  | NIM: Net interest margin
CIK: Central Index Key |  | NSF: Non-sufficient funds
DIF: Deposit Insurance Fund |  | OBBBA: One Big Beautiful Bill Act
DIFS: Department of Insurance and Financial Services |  | OCI: Other comprehensive income (loss)
Directors Plan: Isabella Bank Corporation and Related Companies Deferred Compensation Plan for Directors |  | OMSR: Originated mortgage servicing rights
Dividend Reinvestment Plan: Isabella Bank Corporation Stockholder Dividend Reinvestment Plan and Employee Stock Purchase Plan |  | OREO: Other real estate owned
ETR: Effective tax rate |  | Rabbi Trust: A trust established to fund our Directors Plan
Exchange Act: Securities Exchange Act of 1934, as amended |  | RSP: Isabella Bank Corporation Restricted Stock Plan
FASB: Financial Accounting Standards Board |  | SOFR: Secured Overnight Financing Rate
FDIC: Federal Deposit Insurance Corporation |  | SEC: U.S. Securities and Exchange Commission
FFIEC: Federal Financial Institutions Examinations Council |  | SOX: Sarbanes-Oxley Act of 2002
FHLB: Federal Home Loan Bank |  | XBRL: eXtensible Business Reporting Language
FRB: Federal Reserve Bank |  | Yield Curve: U.S. Treasury Yield Curve

3

Table of Contents
PART I – FINANCIAL INFORMATION
Item 1. Financial Statements.
INTERIM CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED)
(Dollars in thousands)

| September 30 2025 |  | December 31 2024
ASSETS |  |  |
Cash and demand deposits due from banks | $ | 32,124 |  |  | $ | 22,830 |
Fed Funds sold and interest bearing balances due from banks | 129,177 |  |  | 1,712 |
Total cash and cash equivalents | 161,301 |  |  | 24,542 |
AFS securities, at fair value | 511,970 |  |  | 489,029 |
FHLB stock | 5,600 |  |  | 12,762 |
Mortgage loans HFS | 737 |  |  | 242 |
Loans | 1,431,905 |  |  | 1,423,571 |
Less allowance for credit losses | 13,149 |  |  | 12,895 |
Net loans | 1,418,756 |  |  | 1,410,676 |
Premises and equipment | 28,659 |  |  | 27,659 |
Cash surrender value of BOLI | 45,651 |  |  | 34,882 |
Goodwill and other intangible assets | 48,282 |  |  | 48,283 |
Other assets | 38,698 |  |  | 38,166 |
Total assets | $ | 2,259,654 |  |  | $ | 2,086,241 |
LIABILITIES AND SHAREHOLDERS’ EQUITY |  |  |
Liabilities |  |  |
Demand deposits | $ | 421,027 |  |  | $ | 416,373 |
Interest bearing demand deposits | 248,666 |  |  | 237,548 |
Money market deposits | 558,212 |  |  | 423,883 |
Savings | 292,899 |  |  | 281,665 |
Certificates of deposit | 404,798 |  |  | 387,591 |
Total deposits | 1,925,602 |  |  | 1,747,060 |
Short-term borrowings | 62,022 |  |  | 53,567 |
FHLB advances | — |  |  | 30,000 |
Subordinated debt, net of unamortized issuance costs | 29,492 |  |  | 29,424 |
Total borrowed funds | 91,514 |  |  | 112,991 |
Other liabilities | 15,118 |  |  | 15,914 |
Total liabilities | 2,032,234 |  |  | 1,875,965 |
Shareholders’ equity |  |  |
Common stock — no par value, 15,000,000 shares authorized: issued and outstanding 7,350,567 shares at September 30, 2025 and 7,424,893 shares at December 31, 2024 | 124,284 |  |  | 126,224 |
Shares to be issued for deferred compensation obligations | 2,373 |  |  | 2,383 |
Retained earnings | 111,172 |  |  | 103,024 |
Accumulated other comprehensive loss | (10,409) |  |  | (21,355) |
Total shareholders’ equity | 227,420 |  |  | 210,276 |
Total liabilities and shareholders' equity | $ | 2,259,654 |  |  | $ | 2,086,241 |

See notes to interim condensed consolidated financial statements (unaudited).
4

Table of Contents
INTERIM CONDENSED CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED)
(Dollars in thousands except per share amounts)

| Three Months Ended September 30 |  | Nine Months Ended September 30
| 2025 |  | 2024 |  | 2025 |  | 2024
Interest income |  |  |  |  |  |  |
Loans | $ | 20,583 |  |  | $ | 20,230 |  |  | $ | 59,763 |  |  | $ | 57,150 |
AFS securities | 2,994 |  |  | 2,749 |  |  | 8,669 |  |  | 8,437 |
FHLB stock | 70 |  |  | 168 |  |  | 355 |  |  | 472 |
Federal funds sold and other | 1,235 |  |  | 194 |  |  | 1,970 |  |  | 750 |
Total interest income | 24,882 |  |  | 23,341 |  |  | 70,757 |  |  | 66,809 |
Interest expense |  |  |  |  |  |  |
Deposits | 8,012 |  |  | 7,631 |  |  | 22,866 |  |  | 22,107 |
Short-term borrowings | 441 |  |  | 384 |  |  | 1,106 |  |  | 1,026 |
FHLB advances | — |  |  | 571 |  |  | 170 |  |  | 1,597 |
Subordinated debt | 267 |  |  | 267 |  |  | 799 |  |  | 799 |
Total interest expense | 8,720 |  |  | 8,853 |  |  | 24,941 |  |  | 25,529 |
Net interest income | 16,162 |  |  | 14,488 |  |  | 45,816 |  |  | 41,280 |
Provision (reversal) for credit losses | 209 |  |  | 946 |  |  | (997) |  |  | 1,508 |
Net interest income after provision for credit losses | 15,953 |  |  | 13,542 |  |  | 46,813 |  |  | 39,772 |
Noninterest income |  |  |  |  |  |  |
Service charges and fees | 2,352 |  |  | 2,133 |  |  | 6,397 |  |  | 6,089 |
Wealth management fees | 1,074 |  |  | 1,003 |  |  | 3,137 |  |  | 2,990 |
Earnings on BOLI | 468 |  |  | 252 |  |  | 1,140 |  |  | 748 |
Net gain on sale of mortgage loans | 38 |  |  | 37 |  |  | 115 |  |  | 138 |
Other | 376 |  |  | 103 |  |  | 733 |  |  | 639 |
Total noninterest income | 4,308 |  |  | 3,528 |  |  | 11,522 |  |  | 10,604 |
Noninterest expenses |  |  |  |  |  |  |
Compensation and benefits | 7,630 |  |  | 7,251 |  |  | 22,509 |  |  | 21,236 |
Occupancy and equipment | 2,628 |  |  | 2,645 |  |  | 7,878 |  |  | 7,970 |
Other professional services | 851 |  |  | 588 |  |  | 2,425 |  |  | 1,628 |
ATM and debit card fees | 595 |  |  | 503 |  |  | 1,636 |  |  | 1,459 |
Marketing | 514 |  |  | 403 |  |  | 1,442 |  |  | 1,254 |
FDIC insurance premiums | 271 |  |  | 291 |  |  | 841 |  |  | 823 |
Other losses | 47 |  |  | 347 |  |  | 501 |  |  | 908 |
Other | 1,449 |  |  | 1,200 |  |  | 3,797 |  |  | 3,521 |
Total noninterest expenses | 13,985 |  |  | 13,228 |  |  | 41,029 |  |  | 38,799 |
Income before income tax expense | 6,276 |  |  | 3,842 |  |  | 17,306 |  |  | 11,577 |
Income tax expense | 1,036 |  |  | 561 |  |  | 3,086 |  |  | 1,684 |
Net income | $ | 5,240 |  |  | $ | 3,281 |  |  | $ | 14,220 |  |  | $ | 9,893 |
Earnings per common share |  |  |  |  |  |  |
Basic | $ | 0.71 |  |  | $ | 0.44 |  |  | $ | 1.93 |  |  | $ | 1.32 |
Diluted | 0.71 |  |  | 0.44 |  |  | 1.92 |  |  | 1.32 |
Cash dividends per common share | 0.28 |  |  | 0.28 |  |  | 0.84 |  |  | 0.84 |

See notes to interim condensed consolidated financial statements (unaudited).
5

Table of Contents
INTERIM CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED)
(Dollars in thousands)

| Three Months Ended September 30 |  | Nine Months Ended September 30
| 2025 |  | 2024 |  | 2025 |  | 2024
Net income | $ | 5,240 |  |  | $ | 3,281 |  |  | $ | 14,220 |  |  | $ | 9,893 |
Unrealized gains on AFS securities | 5,030 |  |  | 13,081 |  |  | 13,923 |  |  | 10,858 |
Tax effect (1) | (1,052) |  |  | (2,724) |  |  | (2,977) |  |  | (2,241) |
Unrealized gains on AFS securities, net of tax | 3,978 |  |  | 10,357 |  |  | 10,946 |  |  | 8,617 |
Comprehensive income | $ | 9,218 |  |  | $ | 13,638 |  |  | $ | 25,166 |  |  | $ | 18,510 |

(1) See “Note 6 – Capital Ratios and Shareholders' Equity” of these consolidated financial statements for tax effect reconciliation.
See notes to interim condensed consolidated financial statements (unaudited).
6

Table of Contents
INTERIM CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS’ EQUITY (UNAUDITED)
(Dollars in thousands except per share amounts)

| Common Stock |  |  |  |  |  |  |  |
| Common Shares Outstanding |  | Amount |  | Common Shares to be Issued for Deferred Compensation Obligations |  | Retained Earnings |  | Accumulated Other Comprehensive Income (Loss) |  | Totals
June 30, 2024 | 7,474,016 |  |  | $ | 126,126 |  |  | $ | 3,951 |  |  | $ | 99,808 |  |  | $ | (27,636) |  |  | $ | 202,249 |
Comprehensive income (loss) | — |  |  | — |  |  | — |  |  | 3,281 |  |  | 10,357 |  |  | 13,638 |
Issuance of common stock | 17,580 |  |  | 350 |  |  | — |  |  | — |  |  | — |  |  | 350 |
Common stock transferred from the Rabbi Trust to satisfy deferred compensation obligations | — |  |  | 23 |  |  | (23) |  |  | — |  |  | — |  |  | — |
Share-based payment awards under the Directors Plan | — |  |  | — |  |  | 53 |  |  | — |  |  | — |  |  | 53 |
Share-based compensation expense recognized in earnings under the RSP | — |  |  | 26 |  |  | — |  |  | — |  |  | — |  |  | 26 |
Common stock purchased for deferred compensation obligations | — |  |  | (290) |  |  | — |  |  | — |  |  | — |  |  | (290) |
Common stock repurchased | (52,876) |  |  | (1,017) |  |  | — |  |  | — |  |  | — |  |  | (1,017) |
Cash dividends paid ($0.28 per common share) | — |  |  | — |  |  | — |  |  | (2,024) |  |  | — |  |  | (2,024) |
September 30, 2024 | 7,438,720 |  |  | $ | 125,218 |  |  | $ | 3,981 |  |  | $ | 101,065 |  |  | $ | (17,279) |  |  | $ | 212,985 |
June 30, 2025 | 7,361,684 |  |  | $ | 124,607 |  |  | $ | 2,331 |  |  | $ | 107,949 |  |  | $ | (14,387) |  |  | $ | 220,500 |
Comprehensive income (loss) | — |  |  | — |  |  | — |  |  | 5,240 |  |  | 3,978 |  |  | 9,218 |
Issuance of common stock | 7,979 |  |  | 272 |  |  | — |  |  | — |  |  | — |  |  | 272 |
Common stock transferred from the Rabbi Trust to satisfy deferred compensation obligations | — |  |  | (10) |  |  | 10 |  |  | — |  |  | — |  |  | — |
Share-based payment awards under the Directors Plan | — |  |  | — |  |  | 32 |  |  | — |  |  | — |  |  | 32 |
Share-based compensation expense recognized in earnings under the RSP | — |  |  | 24 |  |  | — |  |  | — |  |  | — |  |  | 24 |
Common stock repurchased | (19,096) |  |  | (609) |  |  | — |  |  | — |  |  | — |  |  | (609) |
Cash dividends paid ($0.28 per common share) | — |  |  | — |  |  | — |  |  | (2,017) |  |  | — |  |  | (2,017) |
September 30, 2025 | 7,350,567 |  |  | $ | 124,284 |  |  | $ | 2,373 |  |  | $ | 111,172 |  |  | $ | (10,409) |  |  | $ | 227,420 |

7

Table of Contents

| Common Stock |  |  |  |  |  |  |  |
| Common Shares Outstanding |  | Amount |  | Common Shares to be Issued for Deferred Compensation Obligations |  | Retained Earnings |  | Accumulated Other Comprehensive Income (Loss) |  | Totals
December 31, 2023 | 7,485,889 |  |  | $ | 127,323 |  |  | $ | 3,693 |  |  | $ | 97,282 |  |  | $ | (25,896) |  |  | $ | 202,402 |
Comprehensive income (loss) | — |  |  | — |  |  | — |  |  | 9,893 |  |  | 8,617 |  |  | 18,510 |
Issuance of common stock | 61,560 |  |  | 1,190 |  |  | — |  |  | — |  |  | — |  |  | 1,190 |
Common stock issued for deferred compensation under the RSP | 16,240 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Common stock transferred from the Rabbi Trust to satisfy deferred compensation obligations | — |  |  | 44 |  |  | (44) |  |  | — |  |  | — |  |  | — |
Share-based payment awards under the Directors Plan | — |  |  | — |  |  | 332 |  |  | — |  |  | — |  |  | 332 |
Share-based compensation expense recognized in earnings under the RSP | — |  |  | 71 |  |  | — |  |  | — |  |  | — |  |  | 71 |
Common stock purchased for deferred compensation obligations | — |  |  | (991) |  |  | — |  |  | — |  |  | — |  |  | (991) |
Common stock repurchased | (124,969) |  |  | (2,419) |  |  | — |  |  | — |  |  | — |  |  | (2,419) |
Cash dividends paid ($0.84 per common share) | — |  |  | — |  |  | — |  |  | (6,110) |  |  | — |  |  | (6,110) |
September 30, 2024 | 7,438,720 |  |  | $ | 125,218 |  |  | $ | 3,981 |  |  | $ | 101,065 |  |  | $ | (17,279) |  |  | $ | 212,985 |
December 31, 2024 | 7,424,893 |  |  | $ | 126,224 |  |  | $ | 2,383 |  |  | $ | 103,024 |  |  | $ | (21,355) |  |  | $ | 210,276 |
Comprehensive income (loss) | — |  |  | — |  |  | — |  |  | 14,220 |  |  | 10,946 |  |  | 25,166 |
Issuance of common stock | 36,809 |  |  | 1,031 |  |  | — |  |  | — |  |  | — |  |  | 1,031 |
Common stock issued for deferred compensation under the RSP | 11,367 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Common stock transferred from the Rabbi Trust to satisfy deferred compensation obligations | — |  |  | 243 |  |  | (243) |  |  | — |  |  | — |  |  | — |
Share-based payment awards under the Directors Plan | — |  |  | — |  |  | 233 |  |  | — |  |  | — |  |  | 233 |
Share-based compensation expense recognized in earnings under the RSP | — |  |  | 45 |  |  | — |  |  | — |  |  | — |  |  | 45 |
Common stock repurchased | (122,502) |  |  | (3,259) |  |  | — |  |  | — |  |  | — |  |  | (3,259) |
Cash dividends paid ($0.84 per common share) | — |  |  | — |  |  | — |  |  | (6,072) |  |  | — |  |  | (6,072) |
September 30, 2025 | 7,350,567 |  |  | $ | 124,284 |  |  | $ | 2,373 |  |  | $ | 111,172 |  |  | $ | (10,409) |  |  | $ | 227,420 |

See notes to interim condensed consolidated financial statements (unaudited).
8

Table of Contents
INTERIM CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED)
(Dollars in thousands)

| Nine Months Ended September 30
| 2025 |  | 2024
Operating activities |  |  |
Net income | $ | 14,220 |  |  | $ | 9,893 |
Reconciliation of net income to net cash provided by operating activities |  |  |
(Reversal of) provision for credit losses | (997) |  |  | 1,508 |
Depreciation | 1,601 |  |  | 1,555 |
Net amortization of AFS securities | 771 |  |  | 1,017 |
Net gain on sale of mortgage loans | (115) |  |  | (138) |
Increase in cash value of BOLI | (1,125) |  |  | (733) |
Share-based payment awards | 278 |  |  | 403 |
Origination of loans HFS | (4,881) |  |  | (6,168) |
Proceeds from loan sales | 4,501 |  |  | 5,802 |
Net changes in: |  |  |
Other assets | (2,002) |  |  | (895) |
Other liabilities | 3,039 |  |  | 270 |
Net cash provided by (used in) operating activities | 15,290 |  |  | 12,514 |
Investing activities |  |  |
Proceeds from maturities, calls and prepayments of AFS securities | 52,359 |  |  | 31,183 |
Purchases of AFS securities | (62,148) |  |  | — |
Net change in loans HFI | (8,008) |  |  | (77,151) |
Purchases of premises and equipment | (2,601) |  |  | (1,590) |
Purchases of BOLI policies | (10,225) |  |  | — |
Proceeds from sale of FHLB stock | 7,162 |  |  | — |
Low income housing tax credit investments | (3,767) |  |  | (1,690) |
Net cash provided by (used in) investing activities | (27,228) |  |  | (49,248) |
Financing activities |  |  |
Net increase (decrease) in deposits | 178,542 |  |  | 58,137 |
Net increase (decrease) in short-term borrowings | 8,455 |  |  | 5,633 |
Net increase (decrease) in FHLB advances | (30,000) |  |  | (25,000) |
Cash dividends paid on common stock | (6,072) |  |  | (6,110) |
Proceeds from issuance of common stock | 1,031 |  |  | 1,190 |
Common stock repurchased | (3,259) |  |  | (2,419) |
Common stock purchased for deferred compensation obligations | — |  |  | (991) |
Net cash provided by (used in) financing activities | 148,697 |  |  | 30,440 |
Increase (decrease) in cash and cash equivalents | 136,759 |  |  | (6,294) |
Cash and cash equivalents at beginning of period | 24,542 |  |  | 33,672 |
Cash and cash equivalents at end of period | $ | 161,301 |  |  | $ | 27,378 |
Supplemental cash flows information |  |  |
Interest paid | $ | 24,769 |  |  | $ | 25,203 |
Income taxes paid | 1,900 |  |  | 1,800 |
Supplemental noncash information |  |  |
Transfers of loans to foreclosed assets | 925 |  |  | 350 |

See notes to interim condensed consolidated financial statements (unaudited).
9

Table of Contents
NOTES TO INTERIM CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)
(Dollars in thousands except per share amounts and ratios, unless otherwise noted)
Note 1 – Significant Accounting Policies
BASIS OF PRESENTATION AND CONSOLIDATION: As used in these notes, as well as in Management's Discussion and Analysis of Financial Condition and Results of Operations, references to “we,” “our,” “us,” and “the Corporation” refer to Isabella Bank Corporation, a Michigan corporation and registered financial holding company, our wholly-owned banking subsidiary, Isabella Bank, and our other consolidated subsidiaries. References to “the Bank” refer to Isabella Bank.
The accompanying unaudited interim condensed consolidated financial statements in this Quarterly Report on Form 10-Q for the three and nine-month periods ended September 30, 2025 (this “Form 10-Q”) have been prepared in accordance with GAAP for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements. In our opinion, all adjustments considered necessary for a fair presentation have been included. Operating results for the three and nine-month periods ended September 30, 2025 are not necessarily indicative of the results that may be expected for the year ending December 31, 2025. For further information, refer to our Annual Report on Form 10-K for the year ended December 31, 2024, as filed with the SEC on March 12, 2025 (the “2024 Annual Report on Form 10-K”). All financial data presented in these notes, as well as in Management’s Discussion and Analysis of Financial Condition and Results of Operations, including financial data presented in the tables and explanations thereof, are expressed in thousands except per share amounts and ratios and unless otherwise noted.
OPERATING SEGMENTS: Segment information is prepared on the same basis that our Chief Executive Officer, who is our Chief Operating Decision Maker (“CODM”), manages our segments, evaluates financial results, and makes key operating decisions. While the CODM monitors the revenue streams of our various products and services, operations are managed, and financial performance is evaluated on a corporate-wide basis. Operating segments are aggregated into one as operating results for all segments are similar. Accordingly, all of the banking-related operations are considered by management to be aggregated in one reportable operating segment.
The segment is also distinguished by the level of information provided to the CODM, who uses such information to review performance of various components of the business, which are then aggregated if operating performance, products and services, and geographical regions are similar. The CODM will evaluate the financial performance of our business components by evaluating revenue streams, significant expenses, and budget to actual results in assessing our reportable segment and in the determination of allocating resources. Further, the CODM uses revenue streams to evaluate product pricing and significant expenses to assess performance and evaluate return on assets.
Consolidated net income is used to benchmark results against our competitors. Benchmarking and monitoring of budget to actual results are used in assessment performance and in establishing compensation. Revenue from banking operations consists primarily of loan and investment interest, deposit related fees, and wealth fees. Interest expense, provision for credit losses, compensation, and occupancy and equipment costs provide the significant expenses in our banking operations. All operations are domestic.
RECLASSIFICATIONS: Certain amounts reported in the interim 2024 consolidated financial statements have been reclassified to conform with the 2025 presentation. Our accounting policies are materially the same as those discussed in Note 1 to the Consolidated Financial Statements included in our 2024 Annual Report on Form 10-K.
SUBSEQUENT EVENTS: We evaluated subsequent events after September 30, 2025 through the date our interim condensed consolidated financial statements were issued for potential recognition and disclosure. We determined that no subsequent events require financial statement recognition or disclosure between September 30, 2025 and the date our interim condensed consolidated financial statements were issued.
10

Table of Contents
Note 2 – AFS Securities
The amortized cost and fair value of AFS securities, with gross unrealized gains and losses, are as follows at:

| September 30, 2025
| Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Value
U.S. Treasury | $ | 210,462 |  |  | $ | — |  |  | $ | 4,421 |  |  | $ | 206,041 |
States and political subdivisions | 74,042 |  |  | 26 |  |  | 2,966 |  |  | 71,102 |
Auction rate money market preferred | 3,200 |  |  | — |  |  | 410 |  |  | 2,790 |
Mortgage-backed securities | 24,696 |  |  | — |  |  | 1,299 |  |  | 23,397 |
Collateralized mortgage obligations | 203,984 |  |  | 1,081 |  |  | 3,852 |  |  | 201,213 |
Corporate | 8,150 |  |  | — |  |  | 723 |  |  | 7,427 |
Total | $ | 524,534 |  |  | $ | 1,107 |  |  | $ | 13,671 |  |  | $ | 511,970 |

| December 31, 2024
| Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Value
U.S. Treasury | $ | 230,807 |  |  | $ | — |  |  | $ | 10,236 |  |  | $ | 220,571 |
States and political subdivisions | 81,135 |  |  | 9 |  |  | 4,576 |  |  | 76,568 |
Auction rate money market preferred | 3,200 |  |  | — |  |  | 156 |  |  | 3,044 |
Mortgage-backed securities | 29,068 |  |  | — |  |  | 2,182 |  |  | 26,886 |
Collateralized mortgage obligations | 163,156 |  |  | — |  |  | 8,482 |  |  | 154,674 |
Corporate | 8,150 |  |  | — |  |  | 864 |  |  | 7,286 |
Total | $ | 515,516 |  |  | $ | 9 |  |  | $ | 26,496 |  |  | $ | 489,029 |

The amortized cost and fair value of AFS securities by contractual maturity at September 30, 2025 are as follows:

| Maturing |  | Securities with Variable Monthly Payments or Noncontractual Maturities |  |
| Due in One Year or Less |  | After One Year But Within Five Years |  | After Five Years But Within Ten Years |  | After Ten Years |  |  | Total
U.S. Treasury | $ | 160,417 |  |  | $ | 50,045 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 210,462 |
States and political subdivisions | 12,796 |  |  | 18,459 |  |  | 20,048 |  |  | 22,739 |  |  | — |  |  | 74,042 |
Auction rate money market preferred | — |  |  | — |  |  | — |  |  | — |  |  | 3,200 |  |  | 3,200 |
Mortgage-backed securities | — |  |  | — |  |  | — |  |  | — |  |  | 24,696 |  |  | 24,696 |
Collateralized mortgage obligations | — |  |  | — |  |  | — |  |  | — |  |  | 203,984 |  |  | 203,984 |
Corporate | — |  |  | — |  |  | 8,150 |  |  | — |  |  | — |  |  | 8,150 |
Total amortized cost | $ | 173,213 |  |  | $ | 68,504 |  |  | $ | 28,198 |  |  | $ | 22,739 |  |  | $ | 231,880 |  |  | $ | 524,534 |
Fair value | $ | 170,246 |  |  | $ | 66,903 |  |  | $ | 26,153 |  |  | $ | 21,268 |  |  | $ | 227,400 |  |  | $ | 511,970 |

Expected maturities for government sponsored enterprises and states and political subdivisions may differ from contractual maturities as issuers may have the right to call or prepay obligations.
As the auction rate money market preferred investments have continual call dates, they are not reported by a specific maturity group. Because of their variable monthly payments, mortgage-backed securities and collateralized mortgage obligations are not reported by a specific maturity group.
11

Table of Contents
The information in the following tables pertains to AFS securities with gross unrealized losses at September 30, 2025 and December 31, 2024, aggregated by investment category and length of time that individual securities have been in a continuous loss position for which an allowance for credit losses has not been recorded.

| September 30, 2025
| Less Than Twelve Months |  | Twelve Months or More |  |
| Gross Unrealized Losses |  | Fair Value |  | Gross Unrealized Losses |  | Fair Value |  | Total Unrealized Losses
U.S. Treasury | $ | — |  |  | $ | — |  |  | $ | 4,421 |  |  | $ | 206,041 |  |  | $ | 4,421 |
States and political subdivisions | 449 |  |  | 6,642 |  |  | 2,517 |  |  | 31,820 |  |  | 2,966 |
Auction rate money market preferred | — |  |  | — |  |  | 410 |  |  | 2,790 |  |  | 410 |
Mortgage-backed securities | — |  |  | — |  |  | 1,299 |  |  | 23,397 |  |  | 1,299 |
Collateralized mortgage obligations | 59 |  |  | 8,991 |  |  | 3,793 |  |  | 125,753 |  |  | 3,852 |
Corporate | 60 |  |  | 1,640 |  |  | 663 |  |  | 5,787 |  |  | 723 |
Total | $ | 568 |  |  | $ | 17,273 |  |  | $ | 13,103 |  |  | $ | 395,588 |  |  | $ | 13,671 |
Number of securities in an unrealized loss position: |  |  | 39 |  |  |  |  | 144 |  |  | 183 |

| December 31, 2024
| Less Than Twelve Months |  | Twelve Months or More |  |
| Gross Unrealized Losses |  | Fair Value |  | Gross Unrealized Losses |  | Fair Value |  | Total Unrealized Losses
U.S. Treasury | $ | — |  |  | $ | — |  |  | $ | 10,236 |  |  | $ | 220,571 |  |  | $ | 10,236 |
States and political subdivisions | 486 |  |  | 23,553 |  |  | 4,090 |  |  | 36,796 |  |  | 4,576 |
Auction rate money market preferred | — |  |  | — |  |  | 156 |  |  | 3,044 |  |  | 156 |
Mortgage-backed securities | — |  |  | — |  |  | 2,182 |  |  | 26,886 |  |  | 2,182 |
Collateralized mortgage obligations | 185 |  |  | 5,646 |  |  | 8,297 |  |  | 149,028 |  |  | 8,482 |
Corporate | — |  |  | — |  |  | 864 |  |  | 7,286 |  |  | 864 |
Total | $ | 671 |  |  | $ | 29,199 |  |  | $ | 25,825 |  |  | $ | 443,611 |  |  | $ | 26,496 |
Number of securities in an unrealized loss position: |  |  | 175 |  |  |  |  | 178 |  |  | 353 |

As of September 30, 2025, no ACL has been recognized on AFS securities in an unrealized loss position, as management does not believe any of the securities are impaired due to reasons of credit quality. This is based on our analysis of the underlying risk characteristics, including credit ratings, and other qualitative factors related to our AFS securities and consideration of our historical credit loss experience and internal forecasts. The issuers of these securities continue to make timely principal and interest payments under the contractual terms of the securities. Management does not currently intend to sell any of the securities classified as AFS in the table above, and believes it is more likely than not that we will not have to sell any such securities before a recovery of cost. The unrealized losses are generally due to a continued elevated market interest rate environment compared to the yields available at the time the underlying securities were purchased. The fair value is expected to recover as the securities approach their respective maturity date or repricing date, or if the market yields for such investments decline.
12

Table of Contents
Note 3 – Loans and ACL
Loan Composition
The following table provides a detailed listing of our loan portfolio at:

| September 30, 2025 |  | December 31, 2024
| Balance |  | Percent of Total |  | Balance |  | Percent of Total
Commercial and industrial |  |  |  |  |  |  |
Secured | $ | 186,306 |  |  | 13.01 | % |  | $ | 177,239 |  |  | 12.45 | %
Unsecured | 31,826 |  |  | 2.22 | % |  | 23,384 |  |  | 1.64 | %
Total commercial and industrial | 218,132 |  |  | 15.23 | % |  | 200,623 |  |  | 14.09 | %
Commercial real estate |  |  |  |  |  |  |
Commercial mortgage owner occupied | 220,233 |  |  | 15.38 | % |  | 213,086 |  |  | 14.97 | %
Commercial mortgage non-owner occupied | 224,653 |  |  | 15.70 | % |  | 217,679 |  |  | 15.29 | %
Commercial mortgage 1-4 family investor | 97,971 |  |  | 6.84 | % |  | 92,497 |  |  | 6.50 | %
Commercial mortgage multifamily | 83,785 |  |  | 5.85 | % |  | 68,456 |  |  | 4.81 | %
Total commercial real estate | 626,642 |  |  | 43.77 | % |  | 591,718 |  |  | 41.57 | %
Advances to mortgage brokers | 5,056 |  |  | 0.35 | % |  | 63,080 |  |  | 4.43 | %
Agricultural |  |  |  |  |  |  |
Agricultural mortgage | 67,726 |  |  | 4.73 | % |  | 67,550 |  |  | 4.75 | %
Agricultural other | 30,068 |  |  | 2.10 | % |  | 32,144 |  |  | 2.26 | %
Total agricultural | 97,794 |  |  | 6.83 | % |  | 99,694 |  |  | 7.01 | %
Residential real estate |  |  |  |  |  |  |
Senior lien | 358,755 |  |  | 25.05 | % |  | 332,743 |  |  | 23.37 | %
Junior lien | 10,674 |  |  | 0.75 | % |  | 8,655 |  |  | 0.61 | %
Home equity lines of credit | 42,627 |  |  | 2.98 | % |  | 39,474 |  |  | 2.77 | %
Total residential real estate | 412,056 |  |  | 28.78 | % |  | 380,872 |  |  | 26.75 | %
Consumer |  |  |  |  |  |  |
Secured - direct | 29,952 |  |  | 2.09 | % |  | 35,050 |  |  | 2.46 | %
Secured - indirect | 38,922 |  |  | 2.72 | % |  | 49,136 |  |  | 3.45 | %
Unsecured | 3,351 |  |  | 0.23 | % |  | 3,398 |  |  | 0.24 | %
Total consumer | 72,225 |  |  | 5.04 | % |  | 87,584 |  |  | 6.15 | %
Total | $ | 1,431,905 |  |  | 100.00 | % |  | $ | 1,423,571 |  |  | 100.00 | %

We grant commercial, agricultural, residential real estate, and consumer loans to customers primarily in Bay, Clare, Gratiot, Isabella, Mecosta, Midland, Montcalm, and Saginaw counties in Michigan. The ability of borrowers to honor their repayment obligations is often dependent upon the real estate, agricultural, manufacturing, retail, gaming, tourism, health care, higher education, and general economic conditions of this region. Substantially all of our consumer and residential real estate loans are secured by various items of property, while commercial loans are secured primarily by real estate, business assets, and personal guarantees. A small portion of loans are unsecured.
Loans that we have the intent and ability to hold in our portfolio are reported at their outstanding principal balance adjusted for any charge-offs, the ACL, and deferred fees or costs. Unless a loan has a nonaccrual status, interest income is accrued over the term of the loan based on the principal amount outstanding. Loan origination fees and certain direct loan origination costs are capitalized and recognized as a component of interest income over the term of the loan using the appropriate amortization method. Net unamortized deferred loan costs were $3,129 and $3,330 at September 30, 2025 and December 31, 2024, respectively.
Commercial and agricultural loans include loans for commercial real estate, commercial operating loans, advances to mortgage brokers, farmland and agricultural production, and loans to states and political subdivisions. Repayment of these loans is dependent upon the successful operation and management of a business. We minimize our risk by limiting the amount of direct credit exposure to any one borrower to $18,000. Borrowers with direct credit needs of more than $18,000 may be serviced through the use of loan participations with other commercial banks. Commercial and agricultural real estate loans commonly
13

Table of Contents
require loan-to-value limits of 80% or less. Depending upon the type of loan, past credit history, and current operating results, we may require the borrower to pledge accounts receivable, inventory, property, or equipment. Government agency guarantee may be required. Personal guarantees and/or life insurance beneficiary assignments are generally required from the owners of closely held corporations, partnerships, and sole proprietorships. In addition, we may require annual financial statements, prepare cash flow analyses, and review credit reports.
We offer adjustable-rate mortgages, construction loans, and fixed rate residential real estate loans which have amortization periods up to a maximum of 30 years. We consider the anticipated direction of interest rates, balance sheet duration, the sensitivity of our balance sheet to changes in interest rates, our liquidity needs, and overall loan demand to determine whether or not to sell fixed rate loans to Freddie Mac.
Our lending policies generally limit the maximum loan-to-value ratio on residential real estate loans to 100% of the lower of the appraised value of the property or the purchase price. Private mortgage insurance is typically required on loans with loan-to-value ratios in excess of 80% unless the loan qualifies for government guarantees.
Underwriting criteria for originated residential real estate loans generally include:
•Evaluation of the borrower’s ability to make monthly payments.
•Evaluation of the value of the property securing the loan.
•Ensuring the payment of principal, interest, taxes, and hazard insurance generally does not exceed 28% of a borrower’s gross income.
•Ensuring all debt servicing does not exceed 40% of income.
•Verification of acceptable credit reports.
•Verification of employment, income, and financial information.
Appraisals are performed by independent appraisers and are reviewed for appropriateness. Generally, mortgage loan requests are reviewed by our mortgage loan committee or through a secondary market underwriting system; loans in excess of $1,000 require the approval of one or more of the following committees: Internal Loan Committee, the Executive Loan Committee, or the Board of Directors.
Consumer loans include secured and unsecured personal loans. Loans are amortized for a period of up to 15 years based on the age and value of the underlying collateral. The underwriting emphasis is on a borrower’s perceived intent and ability to pay rather than collateral value. No consumer loans are sold to the secondary market.
Nonaccrual and Past Due Loans
The accrual of interest on commercial and agricultural loans, as well as residential real estate loans, is discontinued at the time a loan is 90 days or more past due unless the credit is well-secured and in the process of short-term collection. Upon transferring a loan to nonaccrual status, we perform an evaluation to determine the net realizable value of the underlying collateral. This evaluation is used to help determine if a charge-off is necessary. Consumer loans are typically charged off no later than 180 days past due. Past due status is based on the contractual term of the loan. In all cases, a loan is placed in nonaccrual status at an earlier date if collection of principal or interest is considered doubtful.
When a loan is placed in nonaccrual status, all interest accrued in the current calendar year, but not collected, is reversed against interest income while interest accrued in prior calendar years, but not collected, is charged against the ACL. Loans may be returned to accrual status after six months of continuous performance and achievement of current payment status. Accrued interest receivable on loans was $6,592 and $6,384 at September 30, 2025 and December 31, 2024, respectively, which is included in other assets on the consolidated balance sheets.
14

Table of Contents
The following table summarizes nonaccrual loan data by class of loans as of:

| September 30, 2025 |  | December 31, 2024
| Total Nonaccrual Loans |  | Nonaccrual Loans with No ACL |  | Total Nonaccrual Loans |  | Nonaccrual Loans with No ACL
Commercial and industrial |  |  |  |  |  |  |
Secured | $ | 16 |  |  | $ | 16 |  |  | $ | — |  |  | $ | — |
Commercial real estate |  |  |  |  |  |  |
Commercial mortgage 1-4 family investor | 3,000 |  |  | 3,000 |  |  | — |  |  | — |
Residential real estate |  |  |  |  |  |  |
Senior lien | 427 |  |  | 427 |  |  | 282 |  |  | 282 |
Total | $ | 3,443 |  |  | $ | 3,443 |  |  | $ | 282 |  |  | $ | 282 |

The following tables summarize the past due and current loans for the entire loan portfolio as of:

| September 30, 2025
| Past Due: |  |  |  |  |  | Accruing Loans 90 or More Days Past Due
| 30-59 Days |  | 60-89 Days |  | 90 Days or More |  | Current |  | Total |
Commercial and industrial |  |  |  |  |  |  |  |  |  |  |
Secured | $ | 100 |  |  | $ | — |  |  | $ | 16 |  |  | $ | 186,190 |  |  | $ | 186,306 |  |  | $ | — |
Unsecured | — |  |  | — |  |  | — |  |  | 31,826 |  |  | 31,826 |  |  | — |
Total commercial and industrial | 100 |  |  | — |  |  | 16 |  |  | 218,016 |  |  | 218,132 |  |  | — |
Commercial real estate |  |  |  |  |  |  |  |  |  |  |
Commercial mortgage owner occupied | — |  |  | — |  |  | — |  |  | 220,233 |  |  | 220,233 |  |  | — |
Commercial mortgage non-owner occupied | 139 |  |  | — |  |  | — |  |  | 224,514 |  |  | 224,653 |  |  | — |
Commercial mortgage 1-4 family investor | — |  |  | 3,000 |  |  | — |  |  | 94,971 |  |  | 97,971 |  |  | — |
Commercial mortgage multifamily | — |  |  | — |  |  | — |  |  | 83,785 |  |  | 83,785 |  |  | — |
Total commercial real estate | 139 |  |  | 3,000 |  |  | — |  |  | 623,503 |  |  | 626,642 |  |  | — |
Advances to mortgage brokers | — |  |  | — |  |  | — |  |  | 5,056 |  |  | 5,056 |  |  | — |
Agricultural |  |  |  |  |  |  |  |  |  |  |
Agricultural mortgage | — |  |  | — |  |  | — |  |  | 67,726 |  |  | 67,726 |  |  | — |
Agricultural other | — |  |  | — |  |  | — |  |  | 30,068 |  |  | 30,068 |  |  | — |
Total agricultural | — |  |  | — |  |  | — |  |  | 97,794 |  |  | 97,794 |  |  | — |
Residential real estate |  |  |  |  |  |  |  |  |  |  |
Senior lien | 51 |  |  | 125 |  |  | 18 |  |  | 358,561 |  |  | 358,755 |  |  | 18 |
Junior lien | — |  |  | — |  |  | — |  |  | 10,674 |  |  | 10,674 |  |  | — |
Home equity lines of credit | — |  |  | — |  |  | — |  |  | 42,627 |  |  | 42,627 |  |  | — |
Total residential real estate | 51 |  |  | 125 |  |  | 18 |  |  | 411,862 |  |  | 412,056 |  |  | 18 |
Consumer |  |  |  |  |  |  |  |  |  |  |
Secured - direct | 7 |  |  | — |  |  | — |  |  | 29,945 |  |  | 29,952 |  |  | — |
Secured - indirect | 70 |  |  | — |  |  | — |  |  | 38,852 |  |  | 38,922 |  |  | — |
Unsecured | 8 |  |  | — |  |  | — |  |  | 3,343 |  |  | 3,351 |  |  | — |
Total consumer | 85 |  |  | — |  |  | — |  |  | 72,140 |  |  | 72,225 |  |  | — |
Total | $ | 375 |  |  | $ | 3,125 |  |  | $ | 34 |  |  | $ | 1,428,371 |  |  | $ | 1,431,905 |  |  | $ | 18 |

15

Table of Contents

| December 31, 2024
| Past Due: |  |  |  |  |  | Accruing Loans 90 or More Days Past Due
| 30-59 Days |  | 60-89 Days |  | 90 Days or More |  | Current |  | Total |
Commercial and industrial |  |  |  |  |  |  |  |  |  |  |
Secured | $ | 328 |  |  | $ | — |  |  | $ | — |  |  | $ | 176,911 |  |  | $ | 177,239 |  |  | $ | — |
Unsecured | — |  |  | 50 |  |  | — |  |  | 23,334 |  |  | 23,384 |  |  | — |
Total commercial and industrial | 328 |  |  | 50 |  |  | — |  |  | 200,245 |  |  | 200,623 |  |  | — |
Commercial real estate |  |  |  |  |  |  |  |  |  |  |
Commercial mortgage owner occupied | 25 |  |  | 304 |  |  | — |  |  | 212,757 |  |  | 213,086 |  |  | — |
Commercial mortgage non-owner occupied | 792 |  |  | — |  |  | — |  |  | 216,887 |  |  | 217,679 |  |  | — |
Commercial mortgage 1-4 family investor | — |  |  | — |  |  | — |  |  | 92,497 |  |  | 92,497 |  |  | — |
Commercial mortgage multifamily | — |  |  | — |  |  | — |  |  | 68,456 |  |  | 68,456 |  |  | — |
Total commercial real estate | 817 |  |  | 304 |  |  | — |  |  | 590,597 |  |  | 591,718 |  |  | — |
Advances to mortgage brokers | — |  |  | — |  |  | — |  |  | 63,080 |  |  | 63,080 |  |  | — |
Agricultural |  |  |  |  |  |  |  |  |  |  |
Agricultural mortgage | — |  |  | — |  |  | — |  |  | 67,550 |  |  | 67,550 |  |  | — |
Agricultural other | — |  |  | — |  |  | — |  |  | 32,144 |  |  | 32,144 |  |  | — |
Total agricultural | — |  |  | — |  |  | — |  |  | 99,694 |  |  | 99,694 |  |  | — |
Residential real estate |  |  |  |  |  |  |  |  |  |  |
Senior lien | 3,846 |  |  | 148 |  |  | 163 |  |  | 328,586 |  |  | 332,743 |  |  | — |
Junior lien | 19 |  |  | — |  |  | — |  |  | 8,636 |  |  | 8,655 |  |  | — |
Home equity lines of credit | 10 |  |  | — |  |  | — |  |  | 39,464 |  |  | 39,474 |  |  | — |
Total residential real estate | 3,875 |  |  | 148 |  |  | 163 |  |  | 376,686 |  |  | 380,872 |  |  | — |
Consumer |  |  |  |  |  |  |  |  |  |  |
Secured - direct | 15 |  |  | — |  |  | 19 |  |  | 35,016 |  |  | 35,050 |  |  | 19 |
Secured - indirect | 232 |  |  | — |  |  | — |  |  | 48,904 |  |  | 49,136 |  |  | — |
Unsecured | 4 |  |  | — |  |  | — |  |  | 3,394 |  |  | 3,398 |  |  | — |
Total consumer | 251 |  |  | — |  |  | 19 |  |  | 87,314 |  |  | 87,584 |  |  | 19 |
Total | $ | 5,271 |  |  | $ | 502 |  |  | $ | 182 |  |  | $ | 1,417,616 |  |  | $ | 1,423,571 |  |  | $ | 19 |

16

Table of Contents
Credit Quality Indicators
The following tables display commercial and agricultural loans by credit risk ratings and year of origination as of:

| September 30, 2025
| 2025 |  | 2024 |  | 2023 |  | 2022 |  | 2021 |  | Prior |  | Revolving Loans |  | Revolving Loans Converted to Term |  | Total
Commercial and industrial: Secured |  |  |  |  |  |  |  |  |  |  |  |  |  |
Risk ratings 1-3 | $ | 4,620 |  |  | $ | 10,717 |  |  | $ | 14,511 |  |  | $ | 2,312 |  |  | $ | 3,930 |  |  | $ | 2,927 |  |  | $ | 19,994 |  |  | $ | — |  |  | $ | 59,011 |
Risk rating 4 | 19,291 |  |  | 22,202 |  |  | 10,594 |  |  | 7,197 |  |  | 7,530 |  |  | 2,601 |  |  | 29,246 |  |  | — |  |  | 98,661 |
Risk rating 5 | 2,392 |  |  | 2,278 |  |  | 225 |  |  | 15,553 |  |  | 25 |  |  | — |  |  | 4,422 |  |  | — |  |  | 24,895 |
Risk rating 6 | 91 |  |  | 520 |  |  | 20 |  |  | — |  |  | 39 |  |  | 7 |  |  | 3,046 |  |  | — |  |  | 3,723 |
Risk rating 7 | — |  |  | — |  |  | — |  |  | 16 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 16 |
Risk rating 8 | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Risk rating 9 | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Total | $ | 26,394 |  |  | $ | 35,717 |  |  | $ | 25,350 |  |  | $ | 25,078 |  |  | $ | 11,524 |  |  | $ | 5,535 |  |  | $ | 56,708 |  |  | $ | — |  |  | $ | 186,306 |
2025 year-to-date gross charge-offs | $ | — |  |  | $ | — |  |  | $ | 22 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 22 |
Commercial and industrial: Unsecured |  |  |  |  |  |  |  |  |  |  |  |  |  |
Risk ratings 1-3 | $ | 1,544 |  |  | $ | 348 |  |  | $ | 2,496 |  |  | $ | 160 |  |  | $ | 25 |  |  | $ | 412 |  |  | $ | 1,936 |  |  | $ | — |  |  | $ | 6,921 |
Risk rating 4 | 9,145 |  |  | 1,333 |  |  | 985 |  |  | 1,369 |  |  | 594 |  |  | 299 |  |  | 9,899 |  |  | — |  |  | 23,624 |
Risk rating 5 | 3 |  |  | — |  |  | 63 |  |  | — |  |  | 96 |  |  | — |  |  | 1,031 |  |  | — |  |  | 1,193 |
Risk rating 6 | — |  |  | 88 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 88 |
Risk rating 7 | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Risk rating 8 | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Risk rating 9 | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Total | $ | 10,692 |  |  | $ | 1,769 |  |  | $ | 3,544 |  |  | $ | 1,529 |  |  | $ | 715 |  |  | $ | 711 |  |  | $ | 12,866 |  |  | $ | — |  |  | $ | 31,826 |
2025 year-to-date gross charge-offs | $ | — |  |  | $ | 50 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 50 |
Commercial real estate: Owner occupied |  |  |  |  |  |  |  |  |  |  |  |  |  |
Risk ratings 1-3 | $ | 2,627 |  |  | $ | 4,178 |  |  | $ | 8,979 |  |  | $ | 1,433 |  |  | $ | 10,697 |  |  | $ | 16,331 |  |  | $ | 838 |  |  | $ | — |  |  | $ | 45,083 |
Risk rating 4 | 17,653 |  |  | 34,711 |  |  | 20,676 |  |  | 28,358 |  |  | 37,301 |  |  | 26,896 |  |  | 1,907 |  |  | — |  |  | 167,502 |
Risk rating 5 | 1,497 |  |  | 193 |  |  | 452 |  |  | 1,259 |  |  | 69 |  |  | 1,369 |  |  | 372 |  |  | — |  |  | 5,211 |
Risk rating 6 | — |  |  | 2,060 |  |  | 304 |  |  | — |  |  | 73 |  |  | — |  |  | — |  |  | — |  |  | 2,437 |
Risk rating 7 | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Risk rating 8 | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Risk rating 9 | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Total | $ | 21,777 |  |  | $ | 41,142 |  |  | $ | 30,411 |  |  | $ | 31,050 |  |  | $ | 48,140 |  |  | $ | 44,596 |  |  | $ | 3,117 |  |  | $ | — |  |  | $ | 220,233 |
2025 year-to-date gross charge-offs | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Commercial real estate: Non-owner occupied |  |  |  |  |  |  |  |  |  |  |  |  |  |
Risk ratings 1-3 | $ | 2,564 |  |  | $ | 283 |  |  | $ | 729 |  |  | $ | 6,060 |  |  | $ | 5,651 |  |  | $ | 65 |  |  | $ | 139 |  |  | $ | — |  |  | $ | 15,491 |
Risk rating 4 | 25,717 |  |  | 8,233 |  |  | 26,229 |  |  | 54,700 |  |  | 34,622 |  |  | 29,205 |  |  | 1,490 |  |  | — |  |  | 180,196 |
Risk rating 5 | 220 |  |  | 9,565 |  |  | 7,620 |  |  | 935 |  |  | 1,629 |  |  | 7,497 |  |  | 466 |  |  | — |  |  | 27,932 |
Risk rating 6 | — |  |  | — |  |  | 988 |  |  | — |  |  | — |  |  | 46 |  |  | — |  |  | — |  |  | 1,034 |
Risk rating 7 | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Risk rating 8 | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Risk rating 9 | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Total | $ | 28,501 |  |  | $ | 18,081 |  |  | $ | 35,566 |  |  | $ | 61,695 |  |  | $ | 41,902 |  |  | $ | 36,813 |  |  | $ | 2,095 |  |  | $ | — |  |  | $ | 224,653 |
2025 year-to-date gross charge-offs | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |

17

Table of Contents

| September 30, 2025
| 2025 |  | 2024 |  | 2023 |  | 2022 |  | 2021 |  | Prior |  | Revolving Loans |  | Revolving Loans Converted to Term |  | Total
Commercial real estate: 1-4 family investor |  |  |  |  |  |  |  |  |  |  |  |
Risk ratings 1-3 | $ | 477 |  |  | $ | 1,135 |  |  | $ | 226 |  |  | $ | 2,679 |  |  | $ | 959 |  |  | $ | 1,432 |  |  | $ | 2,857 |  |  | $ | — |  |  | $ | 9,765 |
Risk rating 4 | 10,725 |  |  | 8,790 |  |  | 7,848 |  |  | 8,175 |  |  | 27,307 |  |  | 14,141 |  |  | 7,175 |  |  | — |  |  | 84,161 |
Risk rating 5 | — |  |  | — |  |  | 139 |  |  | 219 |  |  | — |  |  | 123 |  |  | — |  |  | — |  |  | 481 |
Risk rating 6 | — |  |  | — |  |  | 521 |  |  | — |  |  | — |  |  | 43 |  |  | — |  |  | — |  |  | 564 |
Risk rating 7 | — |  |  | — |  |  | 3,000 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 3,000 |
Risk rating 8 | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Risk rating 9 | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Total | $ | 11,202 |  |  | $ | 9,925 |  |  | $ | 11,734 |  |  | $ | 11,073 |  |  | $ | 28,266 |  |  | $ | 15,739 |  |  | $ | 10,032 |  |  | $ | — |  |  | $ | 97,971 |
2025 year-to-date gross charge-offs | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Commercial real estate: Multifamily |  |  |  |  |  |  |  |  |  |  |  |
Risk ratings 1-3 | $ | — |  |  | $ | 992 |  |  | $ | 2,378 |  |  | $ | 1,627 |  |  | $ | 874 |  |  | $ | 1,167 |  |  | $ | 188 |  |  | $ | — |  |  | $ | 7,226 |
Risk rating 4 | 16,633 |  |  | 4,466 |  |  | 1,893 |  |  | 20,533 |  |  | 10,235 |  |  | 19,371 |  |  | 137 |  |  | — |  |  | 73,268 |
Risk rating 5 | — |  |  | 484 |  |  | — |  |  | — |  |  | — |  |  | 2,807 |  |  | — |  |  | — |  |  | 3,291 |
Risk rating 6 | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Risk rating 7 | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Risk rating 8 | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Risk rating 9 | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Total | $ | 16,633 |  |  | $ | 5,942 |  |  | $ | 4,271 |  |  | $ | 22,160 |  |  | $ | 11,109 |  |  | $ | 23,345 |  |  | $ | 325 |  |  | $ | — |  |  | $ | 83,785 |
2025 year-to-date gross charge-offs | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Advances to mortgage brokers |  |  |  |  |  |  |  |  |  |  |  |
Risk ratings 1-3 | $ | 5,056 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 5,056 |
2025 year-to-date gross charge-offs | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Agricultural mortgage |  |  |  |  |  |  |  |  |  |  |  |
Risk ratings 1-3 | $ | 2,169 |  |  | $ | 729 |  |  | $ | — |  |  | $ | 3,026 |  |  | $ | 2,000 |  |  | $ | 4,067 |  |  | $ | 35 |  |  | $ | — |  |  | $ | 12,026 |
Risk rating 4 | 2,544 |  |  | 4,039 |  |  | 3,934 |  |  | 11,242 |  |  | 6,029 |  |  | 12,025 |  |  | 1,681 |  |  | — |  |  | 41,494 |
Risk rating 5 | 550 |  |  | 271 |  |  | 1,097 |  |  | 511 |  |  | 5,836 |  |  | 645 |  |  | 1,048 |  |  | — |  |  | 9,958 |
Risk rating 6 | 535 |  |  | — |  |  | — |  |  | 2,127 |  |  | 69 |  |  | 1,517 |  |  | — |  |  | — |  |  | 4,248 |
Risk rating 7 | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Risk rating 8 | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Risk rating 9 | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Total | $ | 5,798 |  |  | $ | 5,039 |  |  | $ | 5,031 |  |  | $ | 16,906 |  |  | $ | 13,934 |  |  | $ | 18,254 |  |  | $ | 2,764 |  |  | $ | — |  |  | $ | 67,726 |
2025 year-to-date gross charge-offs | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Agricultural other |  |  |  |  |  |  |  |  |  |  |  |  |  |
Risk ratings 1-3 | $ | 874 |  |  | $ | 617 |  |  | $ | 434 |  |  | $ | 677 |  |  | $ | 221 |  |  | $ | 385 |  |  | $ | 2,989 |  |  | $ | — |  |  | $ | 6,197 |
Risk rating 4 | 1,682 |  |  | 864 |  |  | 769 |  |  | 830 |  |  | 576 |  |  | 89 |  |  | 9,970 |  |  | — |  |  | 14,780 |
Risk rating 5 | 206 |  |  | 244 |  |  | 133 |  |  | 31 |  |  | 910 |  |  | 391 |  |  | 2,282 |  |  | — |  |  | 4,197 |
Risk rating 6 | 3,625 |  |  | — |  |  | 103 |  |  | — |  |  | 61 |  |  | — |  |  | 1,105 |  |  | — |  |  | 4,894 |
Risk rating 7 | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Risk rating 8 | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Risk rating 9 | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Total | $ | 6,387 |  |  | $ | 1,725 |  |  | $ | 1,439 |  |  | $ | 1,538 |  |  | $ | 1,768 |  |  | $ | 865 |  |  | $ | 16,346 |  |  | $ | — |  |  | $ | 30,068 |
2025 year-to-date gross charge-offs | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |

18

Table of Contents

| December 31, 2024 |  |  |  |
| 2024 |  | 2023 |  | 2022 |  | 2021 |  | 2020 |  | Prior |  | Revolving Loans |  | Revolving Loans Converted to Term |  | Total |  |  |  |
Commercial and industrial: Secured |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Risk ratings 1-3 | $ | 11,081 |  |  | $ | 10,173 |  |  | $ | 2,352 |  |  | $ | 4,483 |  |  | $ | 4,437 |  |  | $ | 368 |  |  | $ | 10,316 |  |  | $ | — |  |  | $ | 43,210 |  |  |  |  |
Risk rating 4 | 27,530 |  |  | 20,886 |  |  | 14,240 |  |  | 11,014 |  |  | 1,867 |  |  | 2,144 |  |  | 28,109 |  |  | — |  |  | 105,790 |  |  |  |  |
Risk rating 5 | 3,627 |  |  | 559 |  |  | 11,644 |  |  | 164 |  |  | 137 |  |  | 53 |  |  | 6,626 |  |  | — |  |  | 22,810 |  |  |  |  |
Risk rating 6 | 126 |  |  | 288 |  |  | 1,841 |  |  | 71 |  |  | — |  |  | 10 |  |  | 3,093 |  |  | — |  |  | 5,429 |  |  |  |  |
Risk rating 7 | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  |  |  |
Risk rating 8 | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  |  |  |
Risk rating 9 | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  |  |  |
Total | $ | 42,364 |  |  | $ | 31,906 |  |  | $ | 30,077 |  |  | $ | 15,732 |  |  | $ | 6,441 |  |  | $ | 2,575 |  |  | $ | 48,144 |  |  | $ | — |  |  | $ | 177,239 |  |  |  |  |
2024 year-to-date gross charge-offs | $ | — |  |  | $ | 277 |  |  | $ | 33 |  |  | $ | — |  |  | $ | 17 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 327 |  |  |  |  |
Commercial and industrial: Unsecured |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Risk ratings 1-3 | $ | 378 |  |  | $ | 1,967 |  |  | $ | 203 |  |  | $ | 69 |  |  | $ | 48 |  |  | $ | 414 |  |  | $ | 1,966 |  |  | $ | — |  |  | $ | 5,045 |  |  |  |  |
Risk rating 4 | 3,073 |  |  | 2,049 |  |  | 2,388 |  |  | 268 |  |  | 370 |  |  | — |  |  | 8,896 |  |  | — |  |  | 17,044 |  |  |  |  |
Risk rating 5 | 100 |  |  | — |  |  | — |  |  | 121 |  |  | — |  |  | — |  |  | 1,074 |  |  | — |  |  | 1,295 |  |  |  |  |
Risk rating 6 | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  |  |  |
Risk rating 7 | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  |  |  |
Risk rating 8 | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  |  |  |
Risk rating 9 | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  |  |  |
Total | $ | 3,551 |  |  | $ | 4,016 |  |  | $ | 2,591 |  |  | $ | 458 |  |  | $ | 418 |  |  | $ | 414 |  |  | $ | 11,936 |  |  | $ | — |  |  | $ | 23,384 |  |  |  |  |
2024 year-to-date gross charge-offs | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 8 |  |  | $ | 1 |  |  | $ | — |  |  | $ | 9 |  |  |  |  |
Commercial real estate: Owner occupied |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Risk ratings 1-3 | $ | 4,185 |  |  | $ | 8,933 |  |  | $ | 1,994 |  |  | $ | 11,617 |  |  | $ | 13,300 |  |  | $ | 4,421 |  |  | $ | 221 |  |  | $ | — |  |  | $ | 44,671 |  |  |  |  |
Risk rating 4 | 34,980 |  |  | 21,586 |  |  | 32,319 |  |  | 39,439 |  |  | 9,924 |  |  | 20,260 |  |  | 1,626 |  |  | — |  |  | 160,134 |  |  |  |  |
Risk rating 5 | 197 |  |  | 487 |  |  | 876 |  |  | 72 |  |  | 653 |  |  | 791 |  |  | 372 |  |  | — |  |  | 3,448 |  |  |  |  |
Risk rating 6 | 1,354 |  |  | 1,123 |  |  | — |  |  | 636 |  |  | 1,117 |  |  | 504 |  |  | 99 |  |  | — |  |  | 4,833 |  |  |  |  |
Risk rating 7 | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  |  |  |
Risk rating 8 | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  |  |  |
Risk rating 9 | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  |  |  |
Total | $ | 40,716 |  |  | $ | 32,129 |  |  | $ | 35,189 |  |  | $ | 51,764 |  |  | $ | 24,994 |  |  | $ | 25,976 |  |  | $ | 2,318 |  |  | $ | — |  |  | $ | 213,086 |  |  |  |  |
2024 year-to-date gross charge-offs | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  |  |  |
Commercial real estate: Non-owner occupied |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Risk ratings 1-3 | $ | 644 |  |  | $ | 795 |  |  | $ | 5,994 |  |  | $ | 5,178 |  |  | $ | 348 |  |  | $ | 1,781 |  |  | $ | — |  |  | $ | — |  |  | $ | 14,740 |  |  |  |  |
Risk rating 4 | 8,413 |  |  | 42,135 |  |  | 61,524 |  |  | 36,702 |  |  | 4,399 |  |  | 29,225 |  |  | 497 |  |  | — |  |  | 182,895 |  |  |  |  |
Risk rating 5 | 9,726 |  |  | — |  |  | 218 |  |  | 1,681 |  |  | 6,154 |  |  | 709 |  |  | 500 |  |  | — |  |  | 18,988 |  |  |  |  |
Risk rating 6 | — |  |  | 1,006 |  |  | — |  |  | — |  |  | 50 |  |  | — |  |  | — |  |  | — |  |  | 1,056 |  |  |  |  |
Risk rating 7 | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  |  |  |
Risk rating 8 | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  |  |  |
Risk rating 9 | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  |  |  |
Total | $ | 18,783 |  |  | $ | 43,936 |  |  | $ | 67,736 |  |  | $ | 43,561 |  |  | $ | 10,951 |  |  | $ | 31,715 |  |  | $ | 997 |  |  | $ | — |  |  | $ | 217,679 |  |  |  |  |
2024 year-to-date gross charge-offs | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  |  |  |

19

Table of Contents

| December 31, 2024
| 2024 |  | 2023 |  | 2022 |  | 2021 |  | 2020 |  | Prior |  | Revolving Loans |  | Revolving Loans Converted to Term |  | Total
Commercial real estate: 1-4 family investor |  |  |  |  |  |  |  |  |  |  |  |  |  |
Risk ratings 1-3 | $ | 1,165 |  |  | $ | — |  |  | $ | 2,632 |  |  | $ | 791 |  |  | $ | 846 |  |  | $ | 965 |  |  | $ | 3,076 |  |  | $ | — |  |  | $ | 9,475 |
Risk rating 4 | 9,399 |  |  | 12,535 |  |  | 8,911 |  |  | 28,666 |  |  | 13,930 |  |  | 3,640 |  |  | 4,750 |  |  | — |  |  | 81,831 |
Risk rating 5 | — |  |  | 145 |  |  | 339 |  |  | 72 |  |  | — |  |  | 52 |  |  | — |  |  | — |  |  | 608 |
Risk rating 6 | — |  |  | 536 |  |  | — |  |  | — |  |  | — |  |  | 47 |  |  | — |  |  | — |  |  | 583 |
Risk rating 7 | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Risk rating 8 | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Risk rating 9 | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Total | $ | 10,564 |  |  | $ | 13,216 |  |  | $ | 11,882 |  |  | $ | 29,529 |  |  | $ | 14,776 |  |  | $ | 4,704 |  |  | $ | 7,826 |  |  | $ | — |  |  | $ | 92,497 |
2024 year-to-date gross charge-offs | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Commercial real estate: Multifamily |  |  |  |  |  |  |  |  |  |  |  |  |  |
Risk ratings 1-3 | $ | 638 |  |  | $ | 3,383 |  |  | $ | 1,697 |  |  | $ | 936 |  |  | $ | 545 |  |  | $ | 746 |  |  | $ | 150 |  |  | $ | — |  |  | $ | 8,095 |
Risk rating 4 | 2,081 |  |  | 1,957 |  |  | 21,446 |  |  | 11,646 |  |  | 664 |  |  | 19,617 |  |  | 64 |  |  | — |  |  | 57,475 |
Risk rating 5 | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Risk rating 6 | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 2,886 |  |  | — |  |  | — |  |  | 2,886 |
Risk rating 7 | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Risk rating 8 | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Risk rating 9 | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Total | $ | 2,719 |  |  | $ | 5,340 |  |  | $ | 23,143 |  |  | $ | 12,582 |  |  | $ | 1,209 |  |  | $ | 23,249 |  |  | $ | 214 |  |  | $ | — |  |  | $ | 68,456 |
2024 year-to-date gross charge-offs | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Advances to mortgage brokers |  |  |  |  |  |  |  |  |  |  |  |  |  |
Risk ratings 1-3 | $ | 63,080 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 63,080 |
2024 year-to-date gross charge-offs | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Agricultural mortgage |  |  |  |  |  |  |  |  |  |  |  |  |  |
Risk ratings 1-3 | $ | 792 |  |  | $ | — |  |  | $ | 2,700 |  |  | $ | 2,144 |  |  | $ | 2,550 |  |  | $ | 1,250 |  |  | $ | 34 |  |  | $ | — |  |  | $ | 9,470 |
Risk rating 4 | 4,410 |  |  | 4,118 |  |  | 12,959 |  |  | 6,968 |  |  | 5,737 |  |  | 8,586 |  |  | 1,322 |  |  | — |  |  | 44,100 |
Risk rating 5 | 281 |  |  | 1,521 |  |  | 1,342 |  |  | 5,757 |  |  | — |  |  | 1,364 |  |  | 1,045 |  |  | — |  |  | 11,310 |
Risk rating 6 | 60 |  |  | — |  |  | 1,550 |  |  | — |  |  | — |  |  | 1,060 |  |  | — |  |  | — |  |  | 2,670 |
Risk rating 7 | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Risk rating 8 | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Risk rating 9 | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Total | $ | 5,543 |  |  | $ | 5,639 |  |  | $ | 18,551 |  |  | $ | 14,869 |  |  | $ | 8,287 |  |  | $ | 12,260 |  |  | $ | 2,401 |  |  | $ | — |  |  | $ | 67,550 |
2024 year-to-date gross charge-offs | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Agricultural other |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Risk ratings 1-3 | $ | 634 |  |  | $ | 523 |  |  | $ | 106 |  |  | $ | 137 |  |  | $ | 2 |  |  | $ | 210 |  |  | $ | 3,635 |  |  | $ | — |  |  | $ | 5,247 |
Risk rating 4 | 1,940 |  |  | 1,328 |  |  | 1,863 |  |  | 1,893 |  |  | 463 |  |  | 550 |  |  | 13,531 |  |  | — |  |  | 21,568 |
Risk rating 5 | 1,683 |  |  | — |  |  | — |  |  | — |  |  | 438 |  |  | — |  |  | 608 |  |  | — |  |  | 2,729 |
Risk rating 6 | — |  |  | 172 |  |  | — |  |  | 90 |  |  | — |  |  | — |  |  | 2,338 |  |  | — |  |  | 2,600 |
Risk rating 7 | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Risk rating 8 | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Risk rating 9 | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Total | $ | 4,257 |  |  | $ | 2,023 |  |  | $ | 1,969 |  |  | $ | 2,120 |  |  | $ | 903 |  |  | $ | 760 |  |  | $ | 20,112 |  |  | $ | — |  |  | $ | 32,144 |
2024 year-to-date gross charge-offs | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |

20

Table of Contents
We have certain lending policies and procedures in place designed to maximize loan income within an acceptable level of risk. The Board of Directors reviews and approves these policies and procedures on a regular basis. A reporting system supplements the review process by providing management and the Board of Directors with frequent reports related to loan production, loan quality, and concentration of credit, loan delinquencies, nonperforming loans and potential problem loans. We seek to diversify the loan portfolio as a means of managing risk associated with fluctuations in economic conditions.
Internally assigned credit risk ratings are reviewed, at a minimum, when loans are renewed or when management has knowledge of improvements or deterioration of the credit quality of individual credits. Descriptions of the internally assigned credit risk ratings for commercial and agricultural loans are as follows:
1. EXCELLENT – Substantially Risk Free
Credit has strong financial condition and solid earnings history, characterized by:
•High liquidity, strong cash flow, low leverage.
•Unquestioned ability to meet all obligations when due.
•Experienced management, with management succession in place.
•Secured by cash.
2. HIGH QUALITY – Limited Risk
Credit with sound financial condition and a positive trend in earnings supplemented by:
•Favorable liquidity and leverage ratios.
•Ability to meet all obligations when due.
•Management with successful track record.
•Steady and satisfactory earnings history.
•If loan is secured, collateral is of high quality and readily marketable.
•Access to alternative financing.
•Well defined primary and secondary source of repayment.
•If supported by guaranty, the financial strength and liquidity of the guarantor(s) are clearly evident.
3. HIGH SATISFACTORY – Reasonable Risk
Credit with satisfactory financial condition and further characterized by:
•Working capital adequate to support operations.
•Cash flow sufficient to pay debts as scheduled.
•Management experience and depth appear favorable.
•Loan performing according to terms.
•If loan is secured, collateral is acceptable, and loan is fully protected.
4. SATISFACTORY – Acceptable Risk
Credit with bankable risks, although some signs of weaknesses are shown:
•Would include most start-up businesses.
•Occasional instances of trade slowness or repayment delinquency – may have been 10-30 days slow within the past year.
•Management’s abilities are apparent yet unproven.
•Weakness in primary source of repayment with adequate secondary source of repayment.
•Loan structure generally in accordance with policy.
•If secured, loan collateral coverage is marginal.
21

Table of Contents
To be classified as less than satisfactory, only one of the following criteria must be met.
5. SPECIAL MENTION – Criticized
Credit constitutes an undue and unwarranted credit risk but not to the point of justifying a classification of substandard. The credit risk may be relatively minor yet constitutes an unwarranted risk in light of the circumstances surrounding a specific loan:
•Downward trend in sales, profit levels, and margins.
•Impaired working capital position.
•Cash flow is strained in order to meet debt repayment.
•Loan delinquency (30-60 days) and overdrafts may occur.
•Shrinking equity cushion.
•Diminishing primary source of repayment and questionable secondary source.
•Management abilities are questionable.
•Weak industry conditions.
•Litigation pending against the borrower.
•Loan may need to be restructured to improve collateral position or reduce payments.
•Collateral or guaranty offers limited protection.
•Negative debt service coverage, however, the credit is well collateralized, and payments are current.
6. SUBSTANDARD – Classified
Credit is inadequately protected by the current net worth and paying capacity of the borrower or of the collateral pledged. There is a distinct possibility we will implement collection procedures if the loan deficiencies are not corrected. Any commercial loan placed in nonaccrual status will be rated “7” or worse. In addition, the following characteristics may apply:
•Sustained losses have severely eroded the equity and cash flow.
•Deteriorating liquidity.
•Serious management problems or internal fraud.
•Original repayment terms liberalized.
•Likelihood of bankruptcy.
•Inability to access other funding sources.
•Reliance on secondary source of repayment.
•Litigation filed against borrower.
•Interest non-accrual may be warranted.
•Collateral provides little or no value.
•Requires excessive attention of the loan officer.
•Borrower is uncooperative with loan officer.
7. VULNERABLE – Classified
Credit is considered “Substandard” and warrants placing in nonaccrual status. Risk of loss is being evaluated and exit strategy options are under review. Other characteristics that may apply:
•Insufficient cash flow to service debt.
•Minimal or no payments being received.
•Limited options available to avoid the collection process.
•Transition status, expect action will take place to collect loan without immediate progress being made.
22

Table of Contents
8. DOUBTFUL – Workout
Credit has all the weaknesses inherent in a “Substandard” loan with the added characteristic that collection and/or liquidation is pending. The possibility of a loss is extremely high, but its classification as a loss is deferred until liquidation procedures are completed, or reasonably estimable. Other characteristics that may apply:
•Normal operations are severely diminished or have ceased.
•Seriously impaired cash flow.
•Original repayment terms materially altered.
•Secondary source of repayment is inadequate.
•Survivability as a “going concern” is impossible.
•Collection process has begun.
•Bankruptcy petition has been filed.
•Judgments have been filed.
•Portion of the loan balance has been charged off.
9. LOSS – Charge-off
Credit is considered uncollectible and of such little value that their continuance as bankable assets is not warranted. This classification is for charged-off loans but does not mean that the asset has absolutely no recovery or salvage value. These loans are further characterized by:
•Liquidation or reorganization under bankruptcy, with poor prospects of collection.
•Fraudulently overstated assets and/or earnings.
•Collateral has marginal or no value.
•Debtor cannot be located.
•Over 120 days delinquent.
23

Table of Contents
Our primary credit quality indicator for residential real estate and consumer loans is the individual loan’s past due status. The following tables display residential real estate and consumer loans by payment status and year of origination as of:

| September 30, 2025
| 2025 |  | 2024 |  | 2023 |  | 2022 |  | 2021 |  | Prior |  | Revolving Loans |  | Revolving Loans Converted to Term |  | Total
Residential real estate: Senior lien |  |  |  |  |  |  |  |  |  |  |  |  |  |
Current | $ | 51,300 |  |  | $ | 49,468 |  |  | $ | 37,117 |  |  | $ | 43,219 |  |  | $ | 68,435 |  |  | $ | 98,849 |  |  | $ | — |  |  | $ | 9,746 |  |  | $ | 358,134 |
Past due 30-89 days | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 176 |  |  | — |  |  | — |  |  | 176 |
Past due 90 or more days | — |  |  | — |  |  | — |  |  | 18 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 18 |
Nonaccrual | — |  |  | — |  |  | — |  |  | — |  |  | 180 |  |  | 247 |  |  | — |  |  | — |  |  | 427 |
Total | $ | 51,300 |  |  | $ | 49,468 |  |  | $ | 37,117 |  |  | $ | 43,237 |  |  | $ | 68,615 |  |  | $ | 99,272 |  |  | $ | — |  |  | $ | 9,746 |  |  | $ | 358,755 |
2025 year-to-date gross charge-offs | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 1 |  |  | $ | — |  |  | $ | — |  |  | $ | 1 |
Residential real estate: Junior lien |  |  |  |  |  |  |  |  |  |  |  |  |  |
Current | $ | 3,671 |  |  | $ | 3,681 |  |  | $ | 2,317 |  |  | $ | 603 |  |  | $ | 94 |  |  | $ | 308 |  |  | $ | — |  |  | $ | — |  |  | $ | 10,674 |
Past due 30-89 days | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Past due 90 or more days | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Nonaccrual | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Total | $ | 3,671 |  |  | $ | 3,681 |  |  | $ | 2,317 |  |  | $ | 603 |  |  | $ | 94 |  |  | $ | 308 |  |  | $ | — |  |  | $ | — |  |  | $ | 10,674 |
2025 year-to-date gross charge-offs | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Residential real estate: Home equity lines of credit |  |  |  |  |  |  |  |  |  |  |  |
Current | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 42,585 |  |  | $ | 42 |  |  | $ | 42,627 |
Past due 30-89 days | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Past due 90 or more days | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Nonaccrual | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Total | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 42,585 |  |  | $ | 42 |  |  | $ | 42,627 |
2025 year-to-date gross charge-offs | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Consumer: Secured - direct |  |  |  |  |  |  |  |  |  |  |  |  |  |
Current | $ | 6,776 |  |  | $ | 6,952 |  |  | $ | 6,301 |  |  | $ | 4,560 |  |  | $ | 2,576 |  |  | $ | 2,780 |  |  | $ | — |  |  | $ | — |  |  | $ | 29,945 |
Past due 30-89 days | — |  |  | — |  |  | 7 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 7 |
Past due 90 or more days | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Nonaccrual | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Total | $ | 6,776 |  |  | $ | 6,952 |  |  | $ | 6,308 |  |  | $ | 4,560 |  |  | $ | 2,576 |  |  | $ | 2,780 |  |  | $ | — |  |  | $ | — |  |  | $ | 29,952 |
2025 year-to-date gross charge-offs | $ | 2 |  |  | $ | 3 |  |  | $ | 93 |  |  | $ | 38 |  |  | $ | 9 |  |  | $ | 53 |  |  | $ | — |  |  | $ | — |  |  | $ | 198 |
Consumer: Secured - indirect |  |  |  |  |  |  |  |  |  |  |  |  |  |
Current | $ | 2,500 |  |  | $ | 4,904 |  |  | $ | 16,456 |  |  | $ | 5,670 |  |  | $ | 3,891 |  |  | $ | 5,431 |  |  | $ | — |  |  | $ | — |  |  | $ | 38,852 |
Past due 30-89 days | — |  |  | — |  |  | — |  |  | — |  |  | 18 |  |  | 52 |  |  | — |  |  | — |  |  | 70 |
Past due 90 or more days | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Nonaccrual | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Total | $ | 2,500 |  |  | $ | 4,904 |  |  | $ | 16,456 |  |  | $ | 5,670 |  |  | $ | 3,909 |  |  | $ | 5,483 |  |  | $ | — |  |  | $ | — |  |  | $ | 38,922 |
2025 year-to-date gross charge-offs | $ | — |  |  | $ | 8 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 13 |  |  | $ | — |  |  | $ | — |  |  | $ | 21 |

24

Table of Contents

| September 30, 2025
| 2025 |  | 2024 |  | 2023 |  | 2022 |  | 2021 |  | Prior |  | Revolving Loans |  | Revolving Loans Converted to Term |  | Total
Consumer: Unsecured |  |  |  |  |  |  |  |  |  |  |  |  |  |
Current | $ | 1,302 |  |  | $ | 867 |  |  | $ | 256 |  |  | $ | 47 |  |  | $ | 9 |  |  | $ | — |  |  | $ | 862 |  |  | $ | — |  |  | $ | 3,343 |
Past due 30-89 days | 4 |  |  | 4 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 8 |
Past due 90 or more days | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Nonaccrual | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Total | $ | 1,306 |  |  | $ | 871 |  |  | $ | 256 |  |  | $ | 47 |  |  | $ | 9 |  |  | $ | — |  |  | $ | 862 |  |  | $ | — |  |  | $ | 3,351 |
2025 year-to-date gross charge-offs | $ | 427 |  |  | $ | 4 |  |  | $ | 12 |  |  | $ | 1 |  |  | $ | 1 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 445 |

| December 31, 2024
| 2024 |  | 2023 |  | 2022 |  | 2021 |  | 2020 |  | Prior |  | Revolving Loans |  | Revolving Loans Converted to Term |  | Total
Residential real estate: Senior lien |  |  |  |  |  |  |  |  |  |  |  |  |  |
Current | $ | 55,991 |  |  | $ | 35,105 |  |  | $ | 45,916 |  |  | $ | 73,607 |  |  | $ | 47,057 |  |  | $ | 62,303 |  |  | $ | — |  |  | $ | 8,579 |  |  | $ | 328,558 |
Past due 30-89 days | 173 |  |  | 162 |  |  | 331 |  |  | 287 |  |  | 907 |  |  | 2,043 |  |  | — |  |  | — |  |  | 3,903 |
Past due 90 or more days | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Nonaccrual | — |  |  | — |  |  | — |  |  | 163 |  |  | 28 |  |  | 91 |  |  | — |  |  | — |  |  | 282 |
Total | $ | 56,164 |  |  | $ | 35,267 |  |  | $ | 46,247 |  |  | $ | 74,057 |  |  | $ | 47,992 |  |  | $ | 64,437 |  |  | $ | — |  |  | $ | 8,579 |  |  | $ | 332,743 |
2024 year-to-date gross charge-offs | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 10 |  |  | $ | — |  |  | $ | — |  |  | $ | 10 |
Residential real estate: Junior lien |  |  |  |  |  |  |  |  |  |  |  |  |  |
Current | $ | 4,229 |  |  | $ | 3,092 |  |  | $ | 800 |  |  | $ | 86 |  |  | $ | 71 |  |  | $ | 358 |  |  | $ | — |  |  | $ | — |  |  | $ | 8,636 |
Past due 30-89 days | — |  |  | — |  |  | — |  |  | 19 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 19 |
Past due 90 or more days | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Nonaccrual | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Total | $ | 4,229 |  |  | $ | 3,092 |  |  | $ | 800 |  |  | $ | 105 |  |  | $ | 71 |  |  | $ | 358 |  |  | $ | — |  |  | $ | — |  |  | $ | 8,655 |
2024 year-to-date gross charge-offs | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Residential real estate: Home equity lines of credit |  |  |  |  |  |  |  |  |  |  |  |
Current | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 39,464 |  |  | $ | — |  |  | $ | 39,464 |
Past due 30-89 days | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 10 |  |  | — |  |  | 10 |
Past due 90 or more days | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Nonaccrual | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Total | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 39,474 |  |  | $ | — |  |  | $ | 39,474 |
2024 year-to-date gross charge-offs | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Consumer: Secured - direct |  |  |  |  |  |  |  |  |  |  |  |  |  |
Current | $ | 10,990 |  |  | $ | 9,498 |  |  | $ | 6,535 |  |  | $ | 3,947 |  |  | $ | 2,166 |  |  | $ | 1,880 |  |  | $ | — |  |  | $ | — |  |  | $ | 35,016 |
Past due 30-89 days | — |  |  | — |  |  | 15 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 15 |
Past due 90 or more days | — |  |  | — |  |  | — |  |  | — |  |  | 19 |  |  | — |  |  | — |  |  | — |  |  | 19 |
Nonaccrual | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Total | $ | 10,990 |  |  | $ | 9,498 |  |  | $ | 6,550 |  |  | $ | 3,947 |  |  | $ | 2,185 |  |  | $ | 1,880 |  |  | $ | — |  |  | $ | — |  |  | $ | 35,050 |
2024 year-to-date gross charge-offs | $ | — |  |  | $ | 73 |  |  | $ | — |  |  | $ | — |  |  | $ | 27 |  |  | $ | 2 |  |  | $ | — |  |  | $ | — |  |  | $ | 102 |

25

Table of Contents

| December 31, 2024
| 2024 |  | 2023 |  | 2022 |  | 2021 |  | 2020 |  | Prior |  | Revolving Loans |  | Revolving Loans Converted to Term |  | Total
Consumer: Secured - indirect |  |  |  |  |  |  |  |  |  |  |  |  |  |
Current | $ | 6,526 |  |  | $ | 22,624 |  |  | $ | 7,682 |  |  | $ | 4,990 |  |  | $ | 4,018 |  |  | $ | 3,064 |  |  | $ | — |  |  | $ | — |  |  | $ | 48,904 |
Past due 30-89 days | 42 |  |  | 51 |  |  | 50 |  |  | 28 |  |  | 54 |  |  | 7 |  |  | — |  |  | — |  |  | 232 |
Past due 90 or more days | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Nonaccrual | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Total | $ | 6,568 |  |  | $ | 22,675 |  |  | $ | 7,732 |  |  | $ | 5,018 |  |  | $ | 4,072 |  |  | $ | 3,071 |  |  | $ | — |  |  | $ | — |  |  | $ | 49,136 |
2024 year-to-date gross charge-offs | $ | — |  |  | $ | 43 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 43 |
Consumer: Unsecured |  |  |  |  |  |  |  |  |  |  |  |  |  |
Current | $ | 1,654 |  |  | $ | 656 |  |  | $ | 211 |  |  | $ | 22 |  |  | $ | 16 |  |  | $ | — |  |  | $ | 835 |  |  | $ | — |  |  | $ | 3,394 |
Past due 30-89 days | — |  |  | — |  |  | 2 |  |  | — |  |  | — |  |  | — |  |  | 2 |  |  | — |  |  | 4 |
Past due 90 or more days | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Nonaccrual | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Total | $ | 1,654 |  |  | $ | 656 |  |  | $ | 213 |  |  | $ | 22 |  |  | $ | 16 |  |  | $ | — |  |  | $ | 837 |  |  | $ | — |  |  | $ | 3,398 |
2024 year-to-date gross charge-offs | $ | 1,939 |  |  | $ | 12 |  |  | $ | 21 |  |  | $ | — |  |  | $ | — |  |  | $ | 1 |  |  | $ | 21 |  |  | $ | — |  |  | $ | 1,994 |

Loan Modifications
A loan modification includes terms outside of normal lending practices to a borrower experiencing financial difficulty.
Typical modifications granted include, but are not limited to:
•Agreeing to interest rates below prevailing market rates for debt with similar risk characteristics.
•Extending the maturity date or amortization period beyond typical lending guidelines for loans with similar risk characteristics.
•Agreeing to an interest-only payment structure, delaying principal payments, or delaying payments.
•Forgiving principal.
To determine if a borrower is experiencing financial difficulty, factors we consider include:
•The borrower is currently in default on any debt.
•The borrower would likely default on any debt if the concession is not granted.
•The borrower’s cash flow is insufficient to service all debt if the concession is not granted.
•The borrower has declared, or is in the process of declaring, bankruptcy.
•The borrower is unlikely to continue as a going concern (if the entity is a business).
26

Table of Contents
The following is a summary of the amortized cost basis of loan modifications granted to borrowers experiencing financial difficulty for the:

| Three Months Ended September 30, 2025
| Other-Than-Insignificant Payment Delay |  | Term Extension |  | Other-Than-Insignificant Payment Delay and Term Extension
| Amortized Cost Basis |  | % of Total Class of Financial Receivable |  | Amortized Cost Basis |  | % of Total Class of Financial Receivable |  | Amortized Cost Basis |  | % of Total Class of Financial Receivable
Commercial and industrial |  |  |  |  |  |  |  |  |  |  |
Secured | $ | — |  |  | 0.00 | % |  | $ | — |  |  | 0.00 | % |  | $ | 443 |  |  | 0.18 | %
Agricultural |  |  |  |  |  |  |  |  |  |  |
Agricultural mortgage | 914 |  |  | 1.35 | % |  | — |  |  | 0.00 | % |  | — |  |  | 0.00 | %
Agricultural other | — |  |  | 0.00 | % |  | 925 |  |  | 3.08 | % |  | — |  |  | 0.00 | %
Total | $ | 914 |  |  |  |  | $ | 925 |  |  |  |  | $ | 443 |  |  |

| Nine Months Ended September 30, 2025
| Interest Rate Reduction |  | Other-Than-Insignificant Payment Delay |  | Term Extension |  | Other-Than-Insignificant Payment Delay and Term Extension
| Amortized Cost Basis |  | % of Total Class of Financial Receivable |  | Amortized Cost Basis |  | % of Total Class of Financial Receivable |  | Amortized Cost Basis |  | % of Total Class of Financial Receivable |  | Amortized Cost Basis |  | % of Total Class of Financial Receivable
Commercial and industrial |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Secured | $ | 19 |  |  | 0.01 | % |  | $ | — |  |  | 0.00 | % |  | $ | 3,087 |  |  | 1.26 | % |  | $ | 1,006 |  |  | 0.41 | %
Commercial real estate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commercial mortgage owner occupied | — |  |  | 0.00 | % |  | — |  |  | 0.00 | % |  | 1,497 |  |  | 0.84 | % |  | — |  |  | 0.00 | %
Agricultural |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Agricultural mortgage | — |  |  | 0.00 | % |  | 914 |  |  | 1.35 | % |  | — |  |  | 0.00 | % |  | — |  |  | 0.00 | %
Agricultural other | — |  |  | 0.00 | % |  | — |  |  | 0.00 | % |  | 925 |  |  | 3.08 | % |  | — |  |  | 0.00 | %
Total | $ | 19 |  |  |  |  | $ | 914 |  |  |  |  | $ | 5,509 |  |  |  |  | $ | 1,006 |  |  |

| Three Months Ended September 30, 2024
| Interest Rate Reduction
| Amortized Cost Basis |  | % of Total Class of Financial Receivable
Agricultural |  |  |
Agricultural other | $ | 181 |  |  | 0.60 | %
Total | $ | 181 |  |  |

27

Table of Contents

| Nine Months Ended September 30, 2024
| Interest Rate Reduction |  | Other-Than-Insignificant Payment Delay |  | Term Extension |  | Other-Than-Insignificant Payment Delay and Term Extension
| Amortized Cost Basis |  | % of Total Class of Financial Receivable |  | Amortized Cost Basis |  | % of Total Class of Financial Receivable |  | Amortized Cost Basis |  | % of Total Class of Financial Receivable |  | Amortized Cost Basis |  | % of Total Class of Financial Receivable
Commercial and industrial |  |  |  |  |  |  |  |  |  |
Secured | $ | — |  |  | 0.00 | % |  | $ | 1,926 |  |  | 0.88 | % |  | $ | 11 |  |  | 0.01 | % |  | $ | — |  |  | 0.00 | %
Commercial real estate |  |  |  |  |  |  |  |  |  |
Commercial mortgage owner occupied | — |  |  | 0.00 | % |  | 823 |  |  | 0.48 | % |  | — |  |  | 0.00 | % |  | — |  |  | 0.00 | %
Agricultural |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Agricultural mortgage | — |  |  | 0.00 | % |  | 1,305 |  |  | 1.95 | % |  | — |  |  | 0.00 | % |  | — |  |  | 0.00 | %
Agricultural other | 181 |  |  | 0.60 | % |  | — |  |  | 0.00 | % |  | — |  |  | 0.00 | % |  | 1,038 |  |  | 3.46 | %
Consumer |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Secured - indirect | — |  |  | 0.00 | % |  | — |  |  | 0.00 | % |  | 1 |  |  | 0.00 | % |  | — |  |  | 0.00 | %
Total | $ | 181 |  |  |  |  | $ | 4,054 |  |  |  |  | $ | 12 |  |  |  |  | $ | 1,038 |  |  |

We do not modify any loans by forgiving principal or accrued interest. We had committed to advance $79 and $43 in additional funds to be disbursed in connection with modified loans at September 30, 2025 and December 31, 2024, respectively, as displayed in the tables above.
The following is a summary of the financial effect of the modifications granted to borrowers experiencing financial difficulty for the:

| Three Months Ended September 30
| 2025 |  | 2024
| Payment Delay Term |  | Weighted-Average Term Extension (Years) |  | Weighted-Average Interest Rate Reduction
Commercial and industrial |  |  |  |  |
Secured | 6 months |  | 1.08 |  | N/A
Agricultural |  |  |  |  |
Agricultural mortgage | 4 months |  | N/A |  | N/A
Agricultural other | N/A |  | 0.50 |  | 0.50%

| Nine Months Ended September 30
| 2025 |  | 2024
| Weighted-Average Interest Rate Reduction |  | Payment Delay Term |  | Weighted-Average Term Extension (Years) |  | Weighted-Average Interest Rate Reduction |  | Payment Delay Term |  | Weighted-Average Term Extension (Years)
Commercial and industrial |  |  |  |  |  |  |  |  |  |  |
Secured | 10.00% |  | 8.1 months |  | 1.05 |  | N/A |  | 4 months |  | 3.00
Commercial real estate |  |  |  |  |  |  |  |  |  |  |
Commercial mortgage owner occupied | N/A |  | N/A |  | 15.00 |  | N/A |  | 7 months |  | N/A
Agricultural |  |  |  |  |  |  |  |  |  |  |
Agricultural mortgage | N/A |  | 4 months |  | N/A |  | N/A |  | 5 months |  | 0.50
Agricultural other | N/A |  | N/A |  | 0.50 |  | 0.50% |  | 4 months |  | 0.33
Consumer |  |  |  |  |  |  |  |  |  |  |
Secured - indirect | N/A |  | N/A |  | N/A |  | N/A |  | N/A |  | 1.33

28

Table of Contents
We closely monitor the performance of loans that are modified to borrowers experiencing financial difficulty to understand the effectiveness of our modification efforts. The following tables summarize the amortized cost basis of loans that have been modified within the past 12 months prior to:

| September 30, 2025
| Current |  | 30-59 Days Past Due |  | 60-89 Days Past Due |  | 90 Days or More Past Due |  | Total
Commercial and industrial |  |  |  |  |  |  |  |  |
Secured | $ | 4,114 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 4,114 |
Commercial real estate |  |  |  |  |  |  |  |  |
Commercial mortgage owner occupied | 2,832 |  |  | — |  |  | — |  |  | — |  |  | 2,832 |
Agricultural |  |  |  |  |  |  |  |  |
Agricultural mortgage | 1,185 |  |  | — |  |  | — |  |  | — |  |  | 1,185 |
Agricultural other | 925 |  |  | — |  |  | — |  |  | — |  |  | 925 |
Total | $ | 9,056 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 9,056 |

| September 30, 2024
| Current |  | 30-59 Days Past Due |  | 60-89 Days Past Due |  | 90 Days or More Past Due |  | Total
Commercial and industrial |  |  |  |  |  |  |  |  |
Secured | $ | 1,937 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 1,937 |
Commercial real estate |  |  |  |  |  |  |  |  |
Commercial mortgage owner occupied | 823 |  |  | — |  |  | — |  |  | — |  |  | 823 |
Commercial mortgage multifamily | 2,917 |  |  | — |  |  | — |  |  | — |  |  | 2,917 |
Agricultural |  |  |  |  |  |  |  |  |
Agricultural mortgage | 1,305 |  |  | — |  |  | — |  |  | — |  |  | 1,305 |
Agricultural other | 1,219 |  |  | — |  |  | — |  |  | — |  |  | 1,219 |
Consumer |  |  |  |  |  |  |  |  |
Secured - indirect | 1 |  |  | — |  |  | — |  |  | — |  |  | 1 |
Total | $ | 8,202 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 8,202 |

We had no loans that defaulted in each of the three and nine-month periods ended September 30, 2025 and 2024 which were modified within 12 months prior to the default date.
ACL - Loans
The credit quality of our loan portfolio is continuously monitored and is reflected within the ACL for loans. The ACL is an estimate of expected losses inherent within our loan portfolio. The ACL is adjusted by a credit loss expense, which is reported in earnings, and reduced by the charge-off of loan amounts, net of recoveries.
The ACL is evaluated on a regular basis for appropriateness. Our periodic review of the collectability of a loan considers historical experience, the nature and volume of the loan portfolio, adverse situations that may affect the borrower’s ability to repay, estimated value of any underlying collateral, and prevailing economic conditions. This evaluation is inherently subjective as it requires estimates that are susceptible to significant revision as more information becomes available.
The primary factors behind the determination of the level of the ACL are specific allocations for loans individually evaluated, historical loss percentages, delinquency status, and other credit trends and risk characteristics, including current conditions and reasonable and supportable forecasts about the future. Determining the appropriateness of the allowance is complex and requires judgment by management about the effect of matters that are inherently uncertain. In future periods evaluations of the overall loan portfolio, in light of the factors and forecasts then prevailing, may result in significant changes in the allowance and credit loss expense in those future periods.
The methodology for estimating the amount of expected credit losses reported in the ACL has two basic components: a component of individual loans that do not share risk characteristics with other loans; and a pooled component for estimated expected credit losses for pools of loans that share similar risk characteristics.
For a loan that does not share risk characteristics with other loans, an individual analysis is performed to measure an allowance. Loans in nonaccrual status over established dollar thresholds are individually evaluated for specific allocation of the allowance using the fair value of collateral, less costs to sell if foreclosure is probable, or the discounted cash flow method. We do not
29

Table of Contents
recognize interest income on loans in nonaccrual status. For loans not classified as nonaccrual, interest income is recognized daily, as earned, according to the terms of the loan agreement and the principal amount outstanding.
In determining the allowance for credit losses, we derive an estimated credit loss assumption from a model that categorizes loan pools based on loan type and credit risk ratings or delinquency bucket. This model calculates an expected loss percentage for each loan class by considering the probability of default, based on the migration of loans from performing to loss by credit risk ratings or delinquency buckets using life-of-loan analysis, and the historical severity of loss, based on the aggregate net lifetime losses incurred per loan class.
The default and severity factors used to calculate the allowance for credit losses for loans that share similar risk characteristics with other loans are adjusted for differences between the historical period used to calculate historical default and loss severity rates and expected conditions over the remaining lives of the loans in the portfolio. These qualitative factors are used to adjust the historical probabilities of default and severity of loss so that they reflect management's expectation of future conditions based on a reasonable and supportable forecast. To the extent the lives of the loans in the portfolio extend beyond the period for which a reasonable and supportable forecast can be made, the model reverts back to the historical rates of default and severity of loss. Qualitative factors include:
•Changes in lending policies and procedures, including changes in underwriting standards and collection, charge-off, recovery practices not considered elsewhere in estimating credit losses;
•Changes in the experience, ability, and depth of lending management and other relevant staff;
•Changes in interest rates;
•Changes in international, national, regional, and local economic factors;
•Changes in the nature and volume of the portfolio and in the terms of loans;
•Changes in the volume and severity of past due loans, the volume of nonaccrual loans, and the volume and severity of adversely classified or graded loans;
•Lack of current financial information;
•Competition, legal, and regulatory; and
•Changes in the value of underlying collateral.
A summary of activity in the ACL for loans, excluding unfunded commitments, by portfolio segment and the recorded investment in loans by segments follows for the:

| Three Months Ended September 30, 2025
| Commercial and Industrial |  | Commercial Real Estate |  | Agricultural |  | Residential Real Estate |  | Consumer |  | Total
June 30, 2025 | $ | 1,318 |  |  | $ | 5,277 |  |  | $ | 316 |  |  | $ | 4,673 |  |  | $ | 1,393 |  |  | $ | 12,977 |
Charge-offs | — |  |  | — |  |  | — |  |  | — |  |  | (175) |  |  | (175) |
Recoveries | 6 |  |  | 4 |  |  | — |  |  | 16 |  |  | 75 |  |  | 101 |
Provision for credit losses | 29 |  |  | 102 |  |  | 1 |  |  | 107 |  |  | 7 |  |  | 246 |
September 30, 2025 | $ | 1,353 |  |  | $ | 5,383 |  |  | $ | 317 |  |  | $ | 4,796 |  |  | $ | 1,300 |  |  | $ | 13,149 |

| Nine Months Ended September 30, 2025
| Commercial and Industrial |  | Commercial Real Estate |  | Agricultural |  | Residential Real Estate |  | Consumer |  | Total
December 31, 2024 | $ | 1,316 |  |  | $ | 5,171 |  |  | $ | 287 |  |  | $ | 4,521 |  |  | $ | 1,600 |  |  | $ | 12,895 |
Charge-offs | (72) |  |  | — |  |  | — |  |  | (1) |  |  | (664) |  |  | (737) |
Recoveries | 90 |  |  | 56 |  |  | — |  |  | 46 |  |  | 1,955 |  |  | 2,147 |
Reversal of credit losses | 19 |  |  | 156 |  |  | 30 |  |  | 230 |  |  | (1,591) |  |  | (1,156) |
September 30, 2025 | $ | 1,353 |  |  | $ | 5,383 |  |  | $ | 317 |  |  | $ | 4,796 |  |  | $ | 1,300 |  |  | $ | 13,149 |

30

Table of Contents

| Three Months Ended September 30, 2024
| Commercial and Industrial |  | Commercial Real Estate |  | Agricultural |  | Residential Real Estate |  | Consumer |  | Total
June 30, 2024 | $ | 1,264 |  |  | $ | 5,569 |  |  | $ | 258 |  |  | $ | 4,351 |  |  | $ | 1,653 |  |  | $ | 13,095 |
Charge-offs | — |  |  | — |  |  | — |  |  | — |  |  | (1,767) |  |  | (1,767) |
Recoveries | 6 |  |  | 318 |  |  | — |  |  | 20 |  |  | 64 |  |  | 408 |
Provision for credit losses | (46) |  |  | (710) |  |  | — |  |  | (40) |  |  | 1,695 |  |  | 899 |
September 30, 2024 | $ | 1,224 |  |  | $ | 5,177 |  |  | $ | 258 |  |  | $ | 4,331 |  |  | $ | 1,645 |  |  | $ | 12,635 |

| Nine Months Ended September 30, 2024
| Commercial and Industrial |  | Commercial Real Estate |  | Agricultural |  | Residential Real Estate |  | Consumer |  | Total
December 31, 2023 | $ | 968 |  |  | $ | 5,878 |  |  | $ | 270 |  |  | $ | 4,336 |  |  | $ | 1,656 |  |  | $ | 13,108 |
Charge-offs | (336) |  |  | — |  |  | — |  |  | (10) |  |  | (2,139) |  |  | (2,485) |
Recoveries | 10 |  |  | 353 |  |  | 2 |  |  | 112 |  |  | 210 |  |  | 687 |
Provision for credit losses | 582 |  |  | (1,054) |  |  | (14) |  |  | (107) |  |  | 1,918 |  |  | 1,325 |
September 30, 2024 | $ | 1,224 |  |  | $ | 5,177 |  |  | $ | 258 |  |  | $ | 4,331 |  |  | $ | 1,645 |  |  | $ | 12,635 |

The following table illustrates the two main components of the ACL as of:

| September 30 2025 |  | June 30 2025 |  | March 31 2025 |  | December 31 2024 |  | September 30 2024
ACL |  |  |  |  |  |  |  |  |
Individually evaluated | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Collectively evaluated | 13,149 |  |  | 12,977 |  |  | 12,735 |  |  | 12,895 |  |  | 12,635 |
Total | $ | 13,149 |  |  | $ | 12,977 |  |  | $ | 12,735 |  |  | $ | 12,895 |  |  | $ | 12,635 |
ACL to gross loans |  |  |  |  |  |  |  |  |
Individually evaluated | 0.00 | % |  | 0.00 | % |  | 0.00 | % |  | 0.00 | % |  | 0.00 | %
Collectively evaluated | 0.92 | % |  | 0.93 | % |  | 0.93 | % |  | 0.91 | % |  | 0.89 | %
Total | 0.92 | % |  | 0.93 | % |  | 0.93 | % |  | 0.91 | % |  | 0.89 | %

The following table presents loans that were evaluated for expected credit losses on an individual basis and the related specific allocations, by loan segment as of:

| September 30, 2025 |  | December 31, 2024
| Loan Balance |  | Specific Allocation |  | Loan Balance |  | Specific Allocation
Commercial and industrial | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Commercial real estate | 3,000 |  |  | — |  |  | — |  |  | — |
Agricultural | — |  |  | — |  |  | — |  |  | — |
Residential real estate | 426 |  |  | — |  |  | 254 |  |  | — |
Consumer | — |  |  | — |  |  | — |  |  | — |
Total | $ | 3,426 |  |  | $ | — |  |  | $ | 254 |  |  | $ | — |

We have designated loans classified as collateral dependent for which we apply the practical expedient to measure the ACL based on the fair value of the collateral less cost to sell when the repayment is expected to be provided substantially by the sale or operation of the collateral and the borrower is experiencing financial difficulty. The fair value of the collateral is based on appraisals, which may be adjusted due to their age, and the type, location, and condition of the property or area or general market conditions to reflect the expected change in value between the effective date of the appraisal and the measurement date. Appraisals are updated every one to two years depending on the type of loan and the total exposure of the borrower. Loans evaluated for expected credit losses on an individual basis as of September 30, 2025 include $3,426 in collateral dependent loans secured by commercial real estate and residential real estate of $3,000 and $426, respectively.
31

Table of Contents
Note 4 – Borrowed Funds
Short-term borrowings
Short-term borrowings include securities sold under repurchase agreements without stated maturity dates, federal funds purchased, and FRB Discount Window advances, which all generally mature within one to three days from the transaction date.
A summary of short-term borrowed funds without stated maturity dates was as follows for the:

| Three Months Ended September 30
| 2025 |  | 2024
| Maximum Month End Balance |  | Average Balance |  | Weighted Average Interest Rate During the Period |  | Maximum Month End Balance |  | Average Balance |  | Weighted Average Interest Rate During the Period
Securities sold under agreements to repurchase without stated maturity dates | $ | 62,022 |  |  | $ | 52,700 |  |  | 3.17 | % |  | $ | 56,051 |  |  | $ | 48,151 |  |  | 3.18 | %
Federal funds purchased | — |  |  | — |  |  | 0.00 | % |  | — |  |  | — |  |  | 0.00 | %
FRB Discount Window | — |  |  | — |  |  | 0.00 | % |  | 5,300 |  |  | 153 |  |  | 5.18 | %

| Nine Months Ended September 30
| 2025 |  | 2024
| Maximum Month End Balance |  | Average Balance |  | Weighted Average Interest Rate During the Period |  | Maximum Month End Balance |  | Average Balance |  | Weighted Average Interest Rate During the Period
Securities sold under agreements to repurchase without stated maturity dates | $ | 62,022 |  |  | $ | 45,705 |  |  | 3.18 | % |  | $ | 56,051 |  |  | $ | 43,140 |  |  | 3.17 | %
Federal funds purchased | — |  |  | 7 |  |  | 5.43 | % |  | — |  |  | 1 |  |  | 6.52 | %
FRB Discount Window | — |  |  | 296 |  |  | 4.50 | % |  | 5,300 |  |  | 56 |  |  | 5.21 | %

Securities sold under agreements to repurchase are classified as secured borrowings and are reflected at the amount of cash received in connection with the transaction. The securities underlying the agreements have a carrying value and a fair value of $87,641 and $67,539 at September 30, 2025 and December 31, 2024, respectively. Such securities remain under our control. We may be required to provide additional collateral based on the fair value of underlying securities.
Securities sold under repurchase agreements without stated maturity dates were as follows as of:

| September 30, 2025 |  | December 31, 2024
| Amount |  | Rate |  | Amount |  | Rate
Securities sold under agreements to repurchase without stated maturity dates | $ | 62,022 |  |  | 3.45 | % |  | $ | 53,567 |  |  | 3.18 | %

We had pledged AFS securities and 1-4 family residential real estate loans in the following amounts at:

| September 30 2025 |  | December 31 2024
Pledged to secure borrowed funds | $ | 413,680 |  |  | $ | 395,286 |
Pledged to secure repurchase agreements | 87,641 |  |  | 67,539 |
Pledged for public deposits and for other purposes necessary or required by law | 68,847 |  |  | 86,162 |
Total | $ | 570,168 |  |  | $ | 548,987 |

AFS securities pledged to repurchase agreements consisted of the following at:

| September 30 2025 |  | December 31 2024
U.S. Treasury | $ | 78,547 |  |  | $ | 57,271 |
Mortgage-backed securities | 7,192 |  |  | 7,979 |
Collateralized mortgage obligations | 1,902 |  |  | 2,289 |
Total | $ | 87,641 |  |  | $ | 67,539 |

32

Table of Contents
AFS securities pledged to repurchase agreements are monitored to ensure the appropriate level is collateralized. In the event of maturities, calls, significant principal repayments, or significant decline in market values, we have an adequate level of AFS securities to pledge to satisfy collateral requirements.
As of September 30, 2025, we had the ability to borrow up to an additional $384,555 without pledging additional collateral.
FHLB advances
FHLB advances are collateralized by a blanket lien on all qualified 1-4 family residential real estate loans, specific AFS securities, and FHLB stock.
The following table lists the maturities and weighted average interest rates of FHLB advances as of:

| September 30, 2025 |  | December 31, 2024
| Amount |  | Rate |  | Amount |  | Rate
Fixed rate due 2025 | $ | — |  |  | 0.00 | % |  | $ | 30,000 |  |  | 4.52 | %

Subordinated notes
We have $30,000 in aggregate principal amount of 3.25% Fixed-to-Floating Rate Subordinated Notes due 2031 (the "Notes"). The Notes initially bear a fixed interest rate of 3.25% until June 15, 2026, after which time until maturity on June 15, 2031, the interest rate will reset quarterly to an annual floating rate equal to the then-current 3-month SOFR plus 256 basis points. The Notes are redeemable by us at any time at our option, in whole or in part, on or after June 15, 2026. The Notes are not subject to redemption at the option of the holders. Additionally, the Notes are intended to qualify for Tier 2 capital treatment, subject to regulatory limitations.
The following table summarizes our outstanding subordinated notes as of:

| September 30, 2025 |  | December 31, 2024
| Amount |  | Rate |  | Amount |  | Rate
Fixed rate at 3.25% to floating, due 2031 | $ | 30,000 |  |  | 3.25 | % |  | $ | 30,000 |  |  | 3.25 | %
Unamortized issuance costs | (508) |  |  |  |  | (576) |  |  |
Total subordinated debt, net | $ | 29,492 |  |  |  |  | $ | 29,424 |  |  |

Note 5 – Computation of Earnings Per Common Share
Basic earnings per common share represents income available to common shareholders divided by the weighted average number of common shares outstanding during the period. Diluted earnings per common share includes additional common shares that would have been outstanding if dilutive potential common shares had been issued. Potential common shares that may be issued relate solely to outstanding shares in the Directors Plan and grant awards under the RSP.
Earnings per common share have been computed based on the following for the:

| Three Months Ended September 30 |  | Nine Months Ended September 30
| 2025 |  | 2024 |  | 2025 |  | 2024
Average number of common shares outstanding for basic calculation | 7,357,977 |  |  | 7,454,097 |  |  | 7,385,813 |  |  | 7,475,571 |
Average potential effect of common shares in the RSP | 13,675 |  |  | 19,087 |  |  | 13,628 |  |  | 16,833 |
Average number of common shares outstanding used to calculate diluted earnings per common share | 7,371,652 |  |  | 7,473,184 |  |  | 7,399,441 |  |  | 7,492,404 |
Net income | $ | 5,240 |  |  | $ | 3,281 |  |  | $ | 14,220 |  |  | $ | 9,893 |
Earnings per common share |  |  |  |  |  |  |
Basic | $ | 0.71 |  |  | $ | 0.44 |  |  | $ | 1.93 |  |  | $ | 1.32 |
Diluted | 0.71 |  |  | 0.44 |  |  | 1.92 |  |  | 1.32 |

33

Table of Contents
Note 6 – Capital Ratios and Shareholders' Equity
As of September 30, 2025 and December 31, 2024, the most recent notifications from the FRB and the FDIC categorized us as “well capitalized” under the FDIC's regulatory framework for prompt corrective action and the Basel III capital guidelines. To be categorized as “well capitalized,” an institution must maintain minimum total risk-based, Tier 1 risk-based, common equity Tier 1, and Tier 1 leverage ratios as set forth in the following tables. The minimum requirements presented below include the minimum required capital levels based on the Basel III capital guidelines. Capital requirements to be considered “well capitalized” are based upon the FDIC's prompt corrective action regulations, as amended to reflect the changes under the Basel III capital guidelines. There were no conditions or events since the notifications that we believe have changed our categories. The following tables set forth these requirements and our ratios, both on a bank-only and on a consolidated basis, as of:

| September 30, 2025
| Actual |  | Minimum Capital Required Plus Capital Conservation Buffer |  | Minimum Capital Required To Be Considered Well Capitalized (1)
| Amount |  | Ratio |  | Amount |  | Ratio |  | Amount |  | Ratio
Common equity Tier 1 capital to risk weighted assets |  |  |  |  |  |  |  |  |  |  |
Isabella Bank | $ | 187,258 |  |  | 12.26 | % |  | $ | 106,874 |  |  | 7.00 | % |  | $ | 99,240 |  |  | 6.50 | %
Consolidated | 189,547 |  |  | 12.37 | % |  | 107,266 |  |  | 7.00 | % |  | N/A |  | N/A
Tier 1 capital to risk weighted assets |  |  |  |  |  |  |  |  |  |  |
Isabella Bank | 187,258 |  |  | 12.26 | % |  | 129,776 |  |  | 8.50 | % |  | 122,142 |  |  | 8.00 | %
Consolidated | 189,547 |  |  | 12.37 | % |  | 130,251 |  |  | 8.50 | % |  | N/A |  | N/A
Total capital to risk weighted assets |  |  |  |  |  |  |  |  |  |  |
Isabella Bank | 201,078 |  |  | 13.17 | % |  | 160,311 |  |  | 10.50 | % |  | 152,677 |  |  | 10.00 | %
Consolidated | 232,859 |  |  | 15.20 | % |  | 160,898 |  |  | 10.50 | % |  | N/A |  | N/A
Tier 1 capital to average assets |  |  |  |  |  |  |  |  |  |  |
Isabella Bank | 187,258 |  |  | 8.63 | % |  | 86,788 |  |  | 4.00 | % |  | 108,486 |  |  | 5.00 | %
Consolidated | 189,547 |  |  | 8.71 | % |  | 87,019 |  |  | 4.00 | % |  | N/A |  | N/A

| December 31, 2024
| Actual |  | Minimum Capital Required Plus Capital Conservation Buffer |  | Minimum Capital Required To Be Considered Well Capitalized (1)
| Amount |  | Ratio |  | Amount |  | Ratio |  | Amount |  | Ratio
Common equity Tier 1 capital to risk weighted assets |  |  |  |  |  |  |  |  |  |  |
Isabella Bank | $ | 172,589 |  |  | 11.53 | % |  | $ | 104,783 |  |  | 7.00 | % |  | $ | 97,299 |  |  | 6.50 | %
Consolidated | 183,348 |  |  | 12.21 | % |  | 105,136 |  |  | 7.00 | % |  | N/A |  | N/A
Tier 1 capital to risk weighted assets |  |  |  |  |  |  |  |  |  |  |
Isabella Bank | 172,589 |  |  | 11.53 | % |  | 127,237 |  |  | 8.50 | % |  | 119,753 |  |  | 8.00 | %
Consolidated | 183,348 |  |  | 12.21 | % |  | 127,665 |  |  | 8.50 | % |  | N/A |  | N/A
Total capital to risk weighted assets |  |  |  |  |  |  |  |  |  |  |
Isabella Bank | 185,997 |  |  | 12.43 | % |  | 157,175 |  |  | 10.50 | % |  | 149,691 |  |  | 10.00 | %
Consolidated | 226,179 |  |  | 15.06 | % |  | 157,703 |  |  | 10.50 | % |  | N/A |  | N/A
Tier 1 capital to average assets |  |  |  |  |  |  |  |  |  |  |
Isabella Bank | 172,589 |  |  | 8.36 | % |  | 82,602 |  |  | 4.00 | % |  | 103,252 |  |  | 5.00 | %
Consolidated | 183,348 |  |  | 8.86 | % |  | 82,803 |  |  | 4.00 | % |  | N/A |  | N/A

(1) "Well-capitalized" minimum common equity Tier 1 to risk-weighted and leverage ratio are not formally defined under applicable regulations for bank holding companies.
Total capital includes Tier 1 capital and Tier 2 capital. Tier 2 capital includes a permissible portion of the allowances for credit losses and subordinated debt, net of unamortized issuance costs. There are no significant regulatory constraints placed on our capital. At September 30, 2025, the Bank exceeded all minimum Basel III risk-based capital requirements with the capital conservation buffer.
34

Table of Contents
State banking regulations place certain restrictions on dividends paid by banks to their shareholders. Dividends paid by the Corporation’s bank subsidiary would be prohibited if the effect thereof would cause the bank subsidiary’s capital to be reduced below applicable minimum capital requirements.
The following table summarizes the changes in AOCI by component for the:

| Three Months Ended September 30
| 2025 |  | 2024
| Unrealized Gains (Losses) on AFS Securities |  |  |  | Defined Benefit Pension Plan |  | Total |  | Unrealized Gains (Losses) on AFS Securities |  |  |  | Defined Benefit Pension Plan |  | Total
Balance, July 1 | $ | (13,990) |  |  |  |  | $ | (397) |  |  | $ | (14,387) |  |  | $ | (26,939) |  |  |  |  | $ | (697) |  |  | $ | (27,636) |
OCI before reclassifications | 5,030 |  |  |  |  | — |  |  | 5,030 |  |  | 13,081 |  |  |  |  | — |  |  | 13,081 |
Tax effect | (1,052) |  |  |  |  | — |  |  | (1,052) |  |  | (2,724) |  |  |  |  | — |  |  | (2,724) |
OCI, net of tax | 3,978 |  |  |  |  | — |  |  | 3,978 |  |  | 10,357 |  |  |  |  | — |  |  | 10,357 |
Balance, September 30 | $ | (10,012) |  |  |  |  | $ | (397) |  |  | $ | (10,409) |  |  | $ | (16,582) |  |  |  |  | $ | (697) |  |  | $ | (17,279) |

| Nine Months Ended September 30
| 2025 |  | 2024
| Unrealized Gains (Losses) on AFS Securities |  | Defined Benefit Pension Plan |  | Total |  | Unrealized Gains (Losses) on AFS Securities |  | Defined Benefit Pension Plan |  | Total
Balance, December 31 | $ | (20,958) |  |  | $ | (397) |  |  | $ | (21,355) |  |  | $ | (25,199) |  |  | $ | (697) |  |  | $ | (25,896) |
OCI before reclassifications | 13,923 |  |  | — |  |  | 13,923 |  |  | 10,858 |  |  | — |  |  | 10,858 |
Tax effect | (2,977) |  |  | — |  |  | (2,977) |  |  | (2,241) |  |  | — |  |  | (2,241) |
OCI, net of tax | 10,946 |  |  | — |  |  | 10,946 |  |  | 8,617 |  |  | — |  |  | 8,617 |
Balance, September 30 | $ | (10,012) |  |  | $ | (397) |  |  | $ | (10,409) |  |  | $ | (16,582) |  |  | $ | (697) |  |  | $ | (17,279) |

Included in OCI for the three and nine-month periods ended September 30, 2025 and 2024 are changes in unrealized gains and losses related to certain auction rate money market preferred stocks. These investments, for federal income tax purposes, have no deferred federal income taxes related to unrealized gains or losses given the nature of the investments.
A summary of the components of unrealized gains on AFS securities included in OCI follows for the:

| Three Months Ended September 30
| 2025 |  | 2024
| Auction Rate Money Market Preferred |  | All Other AFS Securities |  | Total |  | Auction Rate Money Market Preferred |  | All Other AFS Securities |  | Total
Unrealized gains (losses) arising during the period | $ | (64) |  |  | $ | 5,094 |  |  | $ | 5,030 |  |  | $ | 109 |  |  | $ | 12,972 |  |  | $ | 13,081 |
Tax effect | — |  |  | (1,052) |  |  | (1,052) |  |  | — |  |  | (2,724) |  |  | (2,724) |
Unrealized gains (losses), net of tax | $ | (64) |  |  | $ | 4,042 |  |  | $ | 3,978 |  |  | $ | 109 |  |  | $ | 10,248 |  |  | $ | 10,357 |

| Nine Months Ended September 30
| 2025 |  | 2024
| Auction Rate Money Market Preferred |  | All Other AFS Securities |  | Total |  | Auction Rate Money Market Preferred |  | All Other AFS Securities |  | Total
Unrealized gains (losses) arising during the period | $ | (279) |  |  | $ | 14,202 |  |  | $ | 13,923 |  |  | $ | 186 |  |  | $ | 10,672 |  |  | $ | 10,858 |
Tax effect | — |  |  | (2,977) |  |  | (2,977) |  |  | — |  |  | (2,241) |  |  | (2,241) |
Unrealized gains (losses), net of tax | $ | (279) |  |  | $ | 11,225 |  |  | $ | 10,946 |  |  | $ | 186 |  |  | $ | 8,431 |  |  | $ | 8,617 |

35

Table of Contents
Note 7 – Fair Value
Under fair value measurement and disclosure authoritative guidance, we group assets and liabilities measured at fair value into three levels, based on the markets in which the assets and liabilities are traded, and the reliability of the assumptions used to determine fair value, based on the prioritization of inputs in the valuation techniques. These levels are:

Level 1: | Valuation is based upon quoted prices for identical instruments traded in active markets.
Level 2: | Valuation is based upon quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active and model-based valuation techniques for which all significant assumptions are observable in the market.
Level 3: | Valuation is generated from model-based techniques that use at least one significant assumption not observable in the market. These unobservable assumptions reflect estimates of assumptions that market participants would use in pricing the asset or liability.

The asset’s or liability’s fair value measurement level within the fair value hierarchy is based on the lowest level of any input that is significant to the fair value measurement. Valuation techniques maximize the use of observable inputs and minimize the use of unobservable inputs. Transfers between measurement levels are recognized at the end of reporting periods.
Fair value measurement requires the use of an exit price notion which may differ from entrance pricing. Generally, we believe our assets and liabilities classified as Level 1 or Level 2 approximate an exit price notion.
Following is a description of the valuation methodologies, key inputs, and an indication of the level of the fair value hierarchy in which the assets or liabilities are classified.
AFS securities: AFS securities are recorded at fair value on a recurring basis. Level 1 fair value measurement is based upon quoted prices for identical instruments. Level 2 fair value measurement is based upon quoted prices for similar instruments. If quoted prices are not available, fair values are measured using independent pricing models or other model-based valuation techniques such as the present value of future cash flows, adjusted for the security’s credit rating, prepayment assumptions and other factors such as credit loss and liquidity assumptions. The values for Level 1 and Level 2 investment securities are generally obtained from an independent third party. On a quarterly basis, we compare the values provided to alternative pricing sources.
Loans: We do not record loans at fair value on a recurring basis. However, some loans are individually evaluated for ACL purposes, and a specific ACL may be established. To measure reserve, the fair value of the loan is estimated using the fair value of the collateral, less costs to sell if foreclosure is probable, or the present value of expected future cash flows discounted at the loan’s effective interest rate. Loans not requiring an allowance represent loans for which the fair value of the expected repayments or collateral exceed the recorded investments in such loans.
We review the net realizable values of the underlying collateral for collateral dependent loans on at least a quarterly basis for all loan types. To determine the collateral value, we utilize independent appraisals, broker price opinions, or internal evaluations. We review these valuations to determine whether an additional discount should be applied given the age of market information that may have been considered as well as other factors such as costs to sell an asset if it is determined that the collateral will be liquidated in connection with the ultimate settlement of the loan. We use these valuations to determine if any specific reserves or charge-offs are necessary. We may obtain new valuations in certain circumstances, including when there has been significant deterioration in the condition of the collateral, if the foreclosure process has begun, or if the existing valuation is deemed to be outdated.
36

Table of Contents
The following tables list the quantitative information about loans measured at fair value on a nonrecurring basis as of:

September 30, 2025
Valuation Technique | Fair Value | Unobservable Input |  | Actual Range |  | Weighted Average
Collateral Dependent Loans |  | Discount applied to collateral: |  |  |  |
Discounted value | $ | 3,426 |  | Real Estate |  | 25% |  | 25%

December 31, 2024
Valuation Technique | Fair Value | Unobservable Input |  | Actual Range |  | Weighted Average
Collateral Dependent Loans |  | Discount applied to collateral: |  |  |  |
Discounted value | $ | 254 |  | Real Estate |  | 20% |  | 20%

Collateral discount rates may have ranges to accommodate differences in the age of the independent appraisal, broker price opinion, or internal evaluation.
OMSR: OMSR (which are included in other assets) are subject to impairment testing. To test for impairment, we utilize a discounted cash flow analysis using interest rates and prepayment speed assumptions currently quoted for comparable instruments and discount rates. If the valuation model reflects a value less than the carrying value, OMSR are adjusted to fair value through a valuation allowance as determined by the model. As such, we classify OMSR subject to nonrecurring fair value adjustments as Level 3.
The following table lists the quantitative information about OMSR fair value measurement as of:

September 30, 2025
Valuation Technique | Fair Value | Unobservable Input |  | Rate
Discounted cash flow | $ | 2,164 |  | Constant prepayment rate |  | 7%
|  | Discount rate |  | 11%

December 31, 2024
Valuation Technique | Fair Value | Unobservable Input |  | Rate
Discounted cash flow | $ | 2,483 |  | Constant prepayment rate |  | 7%
|  | Discount rate |  | 11%

The preceding methods described may produce a fair value calculation that may not be indicative of net realizable value or reflective of future fair values. Although we believe our valuation methods are appropriate and consistent with other market participants, the use of different methodologies or assumptions to determine the fair value of certain financial instruments could result in a different fair value measurement.
Estimated Fair Values of Financial Instruments Not Recorded at Fair Value in their Entirety on a Recurring Basis
Disclosure of the estimated fair values of financial instruments, which differ from carrying values, often requires the use of estimates. In cases where quoted market values in an active market are not available, we use present value techniques and other valuation methods to estimate the fair values of our financial instruments. These valuation methods require considerable judgment and the resulting estimates of fair value can be significantly affected by the assumptions made and methods used.
37

Table of Contents
The carrying amount and estimated fair value of financial instruments not recorded at fair value in their entirety on a recurring basis were as follows as of:

| September 30, 2025
| Carrying Value |  | Estimated Fair Value |  | Level 1 |  | Level 2 |  | Level 3
ASSETS |  |  |  |  |  |  |  |  |
Cash and cash equivalents | $ | 161,301 |  |  | $ | 161,301 |  |  | $ | 161,301 |  |  | $ | — |  |  | $ | — |
FHLB stock (1) | 5,600 |  |  | N/A |  | — |  |  | — |  |  | — |
Mortgage loans HFS | 737 |  |  | 737 |  |  | — |  |  | 737 |  |  | — |
Gross loans | 1,431,905 |  |  | 1,395,921 |  |  | — |  |  | — |  |  | 1,395,921 |
Less allowance for credit losses | 13,149 |  |  | 13,149 |  |  | — |  |  | — |  |  | 13,149 |
Net loans | 1,418,756 |  |  | 1,382,772 |  |  | — |  |  | — |  |  | 1,382,772 |
Accrued interest receivable | 8,901 |  |  | 8,901 |  |  | 8,901 |  |  | — |  |  | — |
Equity securities without readily determinable fair values (1) | 3,086 |  |  | N/A |  | — |  |  | — |  |  | — |
LIABILITIES |  |  |  |  |  |  |  |  |
Deposits without stated maturities | 1,520,804 |  |  | 1,520,804 |  |  | 1,520,804 |  |  | — |  |  | — |
Deposits with stated maturities | 404,798 |  |  | 403,407 |  |  | — |  |  | 403,407 |  |  | — |
Short-term borrowings | 62,022 |  |  | 59,196 |  |  | — |  |  | 59,196 |  |  | — |
FHLB advances | — |  |  | — |  |  | — |  |  | — |  |  | — |
Subordinated debt, net of unamortized issuance costs | 29,492 |  |  | 28,417 |  |  | — |  |  | 28,417 |  |  | — |
Accrued interest payable | 980 |  |  | 980 |  |  | 980 |  |  | — |  |  | — |

| December 31, 2024
| Carrying Value |  | Estimated Fair Value |  | Level 1 |  | Level 2 |  | Level 3
ASSETS |  |  |  |  |  |  |  |  |
Cash and cash equivalents | $ | 24,542 |  |  | $ | 24,542 |  |  | $ | 24,542 |  |  | $ | — |  |  | $ | — |
FHLB stock (1) | 12,762 |  |  | N/A |  | — |  |  | — |  |  | — |
Mortgage loans HFS | 242 |  |  | 247 |  |  | — |  |  | 247 |  |  | — |
Gross loans | 1,423,571 |  |  | 1,363,883 |  |  | — |  |  | — |  |  | 1,363,883 |
Less allowance for credit losses | 12,895 |  |  | 12,895 |  |  | — |  |  | — |  |  | 12,895 |
Net loans | 1,410,676 |  |  | 1,350,988 |  |  | — |  |  | — |  |  | 1,350,988 |
Accrued interest receivable | 8,085 |  |  | 8,085 |  |  | 8,085 |  |  | — |  |  | — |
Equity securities without readily determinable fair values (1) | 3,086 |  |  | N/A |  | — |  |  | — |  |  | — |
LIABILITIES |  |  |  |  |  |  |  |  |
Deposits without stated maturities | 1,359,469 |  |  | 1,359,469 |  |  | 1,359,469 |  |  | — |  |  | — |
Deposits with stated maturities | 387,591 |  |  | 385,200 |  |  | — |  |  | 385,200 |  |  | — |
Short-term borrowings | 53,567 |  |  | 53,503 |  |  | — |  |  | 53,503 |  |  | — |
FHLB advances | 30,000 |  |  | 30,000 |  |  | — |  |  | 30,000 |  |  | — |
Subordinated debt, net of unamortized issuance costs | 29,424 |  |  | 27,658 |  |  | — |  |  | 27,658 |  |  | — |
Accrued interest payable | 1,051 |  |  | 1,051 |  |  | 1,051 |  |  | — |  |  | — |

(1) Due to the characteristics of equity securities without readily determinable fair values, they are not disclosed under a specific fair value hierarchy. When an impairment or write-down related to these securities is recorded, such amount would be classified as a nonrecurring Level 3 fair value adjustment.
38

Table of Contents
Financial Instruments Recorded at Fair Value
The table below presents the recorded amount of assets and liabilities measured at fair value on:

| September 30, 2025 |  | December 31, 2024
| Total |  | Level 1 |  | Level 2 |  | Level 3 |  | Total |  | Level 1 |  | Level 2 |  | Level 3
Recurring items |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
AFS securities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Treasury | $ | 206,041 |  |  | $ | — |  |  | $ | 206,041 |  |  | $ | — |  |  | $ | 220,571 |  |  | $ | — |  |  | $ | 220,571 |  |  | $ | — |
States and political subdivisions | 71,102 |  |  | — |  |  | 71,102 |  |  | — |  |  | 76,568 |  |  | — |  |  | 76,568 |  |  | — |
Auction rate money market preferred | 2,790 |  |  | — |  |  | 2,790 |  |  | — |  |  | 3,044 |  |  | — |  |  | 3,044 |  |  | — |
Mortgage-backed securities | 23,397 |  |  | — |  |  | 23,397 |  |  | — |  |  | 26,886 |  |  | — |  |  | 26,886 |  |  | — |
Collateralized mortgage obligations | 201,213 |  |  | — |  |  | 201,213 |  |  | — |  |  | 154,674 |  |  | — |  |  | 154,674 |  |  | — |
Corporate | 7,427 |  |  | — |  |  | 7,427 |  |  | — |  |  | 7,286 |  |  | — |  |  | 7,286 |  |  | — |
Total AFS securities | 511,970 |  |  | — |  |  | 511,970 |  |  | — |  |  | 489,029 |  |  | — |  |  | 489,029 |  |  | — |
Nonrecurring items |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collateral dependent (net of ACL) | 3,426 |  |  | — |  |  | — |  |  | 3,426 |  |  | 254 |  |  | — |  |  | — |  |  | 254 |
OMSR | 2,164 |  |  | — |  |  | — |  |  | 2,164 |  |  | 2,185 |  |  | — |  |  | — |  |  | 2,185 |
Foreclosed assets | 1,018 |  |  | — |  |  | — |  |  | 1,018 |  |  | 544 |  |  | — |  |  | — |  |  | 544 |
Total | $ | 518,578 |  |  | $ | — |  |  | $ | 511,970 |  |  | $ | 6,608 |  |  | $ | 492,012 |  |  | $ | — |  |  | $ | 489,029 |  |  | $ | 2,983 |
Percent of assets and liabilities measured at fair value |  |  | 0.00 | % |  | 98.73 | % |  | 1.27 | % |  |  |  | 0.00 | % |  | 99.39 | % |  | 0.61 | %

We recorded an impairment related to OMSR of $1 and $3 through earnings for the three and nine month periods ended September 30, 2025, respectively, and $21 for each of the three and nine month periods ended September 30, 2024. We recorded impairments related to foreclosed assets of $26 and $89 for three and nine month periods ended September 30, 2025, respectively. No impairments related to foreclosed assets were recorded for three and nine month periods ended September 30, 2024. We had no other assets or liabilities recorded at fair value with changes in fair value recognized through earnings, on a recurring basis or nonrecurring basis, as of September 30, 2025. Further, we had no unrealized gains and losses included in OCI for recurring Level 3 fair value measurements held at the end of the reporting period.
39

Table of Contents
Item 2. Management's Discussion and Analysis of Financial Condition and Results of Operations.
(Dollars in thousands except per share amounts and ratios, unless otherwise noted)
The following is management's discussion and analysis of our financial condition and results of operations for the unaudited periods covered by this Quarterly Report on Form 10-Q for the three and nine months ended September 30, 2025 (this “Form 10-Q”). This analysis should be read in conjunction with our Annual Report on Form 10-K for the year ended December 31, 2024, as filed with the SEC on March 12, 2025 (the “2024 Annual Report on Form 10-K”) and with the unaudited interim condensed consolidated financial statements and notes, beginning on page 4 of this Form 10-Q. Unless we state otherwise or the context otherwise requires, references in this Form 10-Q to “we,” “our,” “us,” and “the Corporation” refer to Isabella Bank Corporation, a Michigan corporation and registered financial holding company, our wholly-owned banking subsidiary, Isabella Bank, and our other consolidated subsidiaries. References to “the Bank” refer to Isabella Bank.
General
Isabella Bank Corporation is a registered financial holding company that was incorporated in September 1988 under Michigan law. The Corporation's wholly owned subsidiary, Isabella Bank, has 31 offices located throughout Bay, Clare, Gratiot, Isabella, Mecosta, Midland, Montcalm, and Saginaw counties. The area includes significant agricultural production, manufacturing, retail, gaming and tourism, and several colleges and universities.
Cautionary Notice Regarding Forward-Looking Statements
This Form 10-Q contains statements that we believe are “forward-looking statements” within the meaning of Section 27A of the Securities Act and Section 21E of the Securities Exchange Act of 1934, as amended (the “Exchange Act”). These forward-looking statements reflect our current views with respect to, among other things, future events and our financial performance. These statements are often, but not always, made through the use of words or phrases such as “may,” “might,” “should,” “could,” “predict,” “potential,” “believe,” “expect,” “continue,” “will,” “anticipate,” “seek,” “estimate,” “intend,” “plan,” “strive,” “projection,” “goal,” “target,” “outlook,” “aim,” “would,” “annualized” and “outlook,” or the negative version of those words or other comparable words or phrases of a future or forward-looking nature. These forward-looking statements are not historical facts, and are based on current expectations, estimates and projections about our industry, management’s beliefs and certain assumptions made by management, many of which, by their nature, are inherently uncertain and beyond our control. Accordingly, we caution you that any such forward-looking statements are not guarantees of future performance and are subject to risks, assumptions, estimates and uncertainties that are difficult to predict. Although we believe that the expectations reflected in these forward-looking statements are reasonable as of the date made, actual results may prove to be materially different from the results expressed or implied by the forward-looking statements.
There are or will be important factors that could cause our actual results to differ materially from those indicated in these forward-looking statements, including, but not limited to, the following:
•slower economic growth rates or potential recession in the United States and our market areas;
•the impacts related to or resulting from uncertainty in the banking industry as a whole;
•increased competition for deposits among traditional and nontraditional financial services companies, and related changes in deposit customer behavior;
•the lingering inflationary pressures, and the risk of the resurgence of elevated levels of inflation, in the United States and our market areas, and its impact on market interest rates, the economy and credit quality;
•our ability to effectively execute our expansion strategy and manage our growth, including identifying and consummating suitable acquisitions;
•business and economic conditions, particularly those affecting our market areas, as well as the concentration of our business in such market areas;
•adverse changes in customer spending, borrowing, and savings habits;
•the impact of pandemics, epidemics, or any other health-related crisis;
•high concentrations of loans secured by real estate located in our market areas;
•changes in unemployment rates in the United States and our market areas;
•risks associated with our commercial loan portfolio, including the risk for deterioration in value of the general business assets that secure such loans;
•potential changes in the prices, values and sales volumes of commercial and residential real estate securing our real estate loans;
40

Table of Contents
•risks associated with our agricultural loan portfolio, including the heightened sensitivity to weather conditions, commodity prices, and other factors generally outside the borrowers and our control;
•risks related to the significant amount of credit that we have extended to a limited number of borrowers and in a limited geographic area;
•public funds deposits comprising a relatively high percentage of our deposits;
•potential impairment on the goodwill we have recorded or may record in connection with business acquisitions;
•our ability to maintain our reputation;
•our ability to successfully manage our credit risk and the sufficiency of our allowance for credit losses;
•our ability to attract, hire and retain qualified management personnel;
•our dependence on our management team, including our ability to retain executive officers and key employees and their customer and community relationships;
•interest rate fluctuations, which could have an adverse effect on our profitability;
•competition from banks, credit unions and other financial services providers;
•our ability to keep pace with technological change or difficulties we may experience when implementing new technologies;
•cybersecurity risk, including cyber incidents or other failures, disruptions or breaches of our operational or security systems or infrastructure, or those of our third-party vendors or other service providers, including as a result of a cyber-attack, could impact the Corporation’s reputation, increase regulatory oversight, and impact the financial results of the Corporation;
•our ability to maintain effective internal control over financial reporting;
•employee error, fraudulent activity by employees or customers and inaccurate or incomplete information about our customers and counterparties;
•increased capital requirements imposed by banking regulators, which may require us to raise capital at a time when capital is not available on favorable terms or at all;
•our ability to maintain adequate liquidity and to raise necessary capital to fund our acquisition strategy and operations or to meet increased minimum regulatory capital levels;
•costs and effects of litigation, investigations or similar matters to which we may be subject, including any effect on our reputation;
•natural disasters, severe weather, acts of god, acts of war or terrorism, geopolitical instability, public health outbreaks (such as coronavirus), other international or domestic calamities, and other events beyond our control, including as a result of in the policies of the current U.S. presidential administration or Congress;
•a deterioration of the credit rating for United States long-term sovereign debt or uncertainty regarding United States fiscal debt, deficit and budget matters;
•the impacts of tariffs, sanctions and other trade policies of the United States and its global trading counterparts and the resulting impact on the Corporation and its customers;
•compliance with governmental and regulatory requirements, including the Dodd-Frank Act Wall Street Reform and Consumer Protection Act (“Dodd-Frank Act”), Economic Growth, Regulatory Relief, and Consumer Protection Act of 2018 (“EGRRCPA”), and others relating to banking, consumer protection, securities and tax matters;
•changes in the laws, rules, regulations, interpretations or policies that apply to the Corporation’s business and operations, and any additional regulations, or repeals that may be forthcoming as a result thereof, which could cause the Corporation to incur additional costs and adversely affect the Corporation’s business environment, operations and financial results; and
•our ability to navigate the uncertain impacts of current and future governmental monetary and fiscal policies, including the current and future policies of the Board of Governors of the Federal Reserve System (“Federal Reserve”) and as a result of initiatives of the Trump administration.
The foregoing factors should not be construed as exhaustive and should be read together with the other cautionary statements included in this Form 10-Q and the risk factors set forth in our 2024 Annual Report on Form 10-K. Because of these risks and other uncertainties, our actual future results, performance or achievements, or industry results, may be materially different from the results indicated by the forward-looking statements in this Form 10-Q. In addition, our past results of operations are not
41

Table of Contents
necessarily indicative of our future results. Accordingly, you should not rely on any forward-looking statements, which represent our beliefs, assumptions and estimates only as of the dates on which such forward-looking statements were made. Any forward-looking statement speaks only as of the date on which it is made, and we do not undertake any obligation to update or review any forward-looking statement, whether as a result of new information, future developments or otherwise, except as required by applicable law.
Non-GAAP Financial Measures
Our accounting and reporting policies conform to GAAP and the prevailing practices in the financial services industry. However, we also evaluate our performance by reference to certain additional financial measures discussed in this Quarterly Report on Form 10-Q that we identify as being “non-GAAP financial measures.” In accordance with SEC rules, we classify a financial measure as being a non-GAAP financial measure if that financial measure excludes or includes amounts, or is subject to adjustments that have the effect of excluding or including amounts, as the case may be, in the most directly comparable measure calculated and presented in accordance with GAAP as in effect from time to time in the United States in our statements of income, balance sheets or statements of cash flows. Non-GAAP financial measures do not include operating and other statistical measures or ratios, or statistical measures calculated using exclusively either financial measures calculated in accordance with GAAP, operating measures or other measures that are not non-GAAP financial measures or both.
We believe that, from time to time, these non-GAAP financial measures provide additional understanding of ongoing operations, enhance the comparability of our results of operations with prior periods and show the effects of significant gains and charges in the periods presented without the impact of items or events that may obscure trends in our underlying performance. However, there may be limits in the usefulness of these measures to investors. The way we calculate the non-GAAP financial measures that we discuss in this Quarterly Report on Form 10-Q may differ from that of other companies reporting measures with similar names. Investors should understand how such other banking organizations calculate their financial measures similar to, or with names like, the non-GAAP financial measures we have discussed in this Quarterly Report on Form 10-Q when comparing such non-GAAP financial measures.
As a result, the non-GAAP financial measures that we discuss in this Quarterly Report on Form 10-Q should not be considered in isolation or as a substitute for the most directly comparable or other financial measures calculated in accordance with GAAP. Moreover, the manner in which we calculate the non-GAAP financial measures that we discuss in this report may differ from that of other companies reporting measures with similar names.
Available Information
The Corporation maintains an Internet web site at ir.isabellabank.com. The Corporation makes available, free of charge, on its web site (under ir.isabellabank.com/sec-filings/default) the Corporation’s annual reports on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K, and amendments to those reports filed or furnished pursuant to Section 13(a) or Section 15(d) of the Exchange Act as soon as reasonably practicable after the Corporation files such material with, or furnishes it to, the SEC. The Corporation also makes available, free of charge, through its web site (under ir.isabellabank.com/governance/governance-documents/default) links to the Corporation’s Code of Conduct and Business Ethics and the charters for its board committees. In addition, the SEC maintains an Internet site (at www.sec.gov ) that contains reports, proxy and information statements, and other information regarding issuers that file electronically with the SEC.
The Corporation routinely posts important information for investors on its web site (under ir.isabellabank.com and, more specifically, under the News tab at ir.isabellabank.com/news/default). The Corporation intends to use its web site as a means of disclosing material non-public information and for complying with its disclosure obligations under SEC Regulation FD (Fair Disclosure). Accordingly, investors should monitor the Corporation’s web site, in addition to following the Corporation’s press releases, SEC filings, public conference calls, presentations and webcasts.
The information contained on, or that may be accessed through, the Corporation’s web site is not incorporated by reference into, and is not a part of, this Form 10-Q.
42

Table of Contents
Executive Summary
Comparison of Operating Results for the three and nine months ended September 30, 2025, and 2024, unless otherwise noted
Net income in the third quarter of 2025 was $5,240, or $0.71 per diluted share, compared with $3,281, or $0.44 per diluted share, in the same quarter of 2024. Net income for the year-to-date period of 2025 was $14,220, or $1.92 per diluted share, compared with $9,893, or $1.32 per diluted share, in the same period of 2024.
Net interest income was $16,162 in the third quarter of 2025 and $14,488 in the same quarter of 2024, representing 3.15% and 2.96% of earning assets, or NIM on an FTE basis, respectively. The book yield from securities was 2.42% and 2.17% during the third quarters of 2025 and 2024, respectively. Our yield on loans expanded to 5.78% in the third quarter of 2025, up from 5.72% in the same quarter of 2024. The expansion in loan yields was a result of higher rates on new loans and variable rate commercial loans that continue to reprice. Our cost of interest-bearing liabilities in the third quarter of 2025 decreased to 2.25% from 2.42% in the third quarter of 2024 due to reductions to rates in the money market and certificate of deposit products. NIM is expected to continue to expand as assets reprice and the cost of interest-bearing liabilities stabilizes.
For the first nine months of 2025, net interest income was $45,816 compared with $41,280 in the same period of 2024. The comparison of NIM and yield on interest earning assets for the nine months ending September 30, 2025 were 3.12% and 4.80%, respectively, compared to 2.87% and 4.62%, respectively, for the same period in 2024. The yield on loans expanded to 5.75%, from 5.55%, and our cost of interest bearing liabilities decreased to 2.25% from 2.36% for the first nine months of 2025 and 2024, respectively. The explanations for the improvement in NIM are consistent with those provided in the year-over-year three month comparison above.
The provision for credit losses was a credit of $209 in the third quarter of 2025, which reflects a $172 increase in the ACL on loans, net charge offs totaling $74, and an increase in the reserve for unfunded commitments. The provision for loan losses in the same period of 2024 was $946 due to growth in core loans (non-GAAP), which excludes advances to mortgage brokers, unfunded commitments, and $1,767 in charge offs. The increase in charge offs was related to overdrawn deposit accounts from a single customer.
For the first nine months of 2025, the provision for credit losses was a credit of $997 compared to a provision of $1,508 in the same period of 2024. Recoveries totaled $2,147, of which $1,556 were related to the overdrawn deposit accounts from a single customer charged off during the third quarter of 2024. Credit quality remains strong with low levels of past due and nonaccrual loans and net charge offs. The Corporation continues to closely monitor credit quality in light of the continued economic uncertainty caused by, among other factors, the interest rate environment, employment data in recent periods, continued uncertainty regarding U.S. trade and tariff policy, and the risk of the resurgence of elevated levels of inflation, in the United States and our market areas. Accordingly, additional provisions for credit losses may be necessary in future periods.
Noninterest income for the three months ended September 30, 2025 and 2024 was $4,308 and $3,528, respectively. Service charges and fees increased $219 as a result of profitability initiatives designed to increase fee income. Wealth management fees grew $71 due to growth in assets under management throughout the year. Earnings on BOLI policies increased $216 over the prior year quarter due to new investments in a separate account BOLI, which was offset in part by a one-time expense of $120 due to restructuring charges. Other noninterest income includes a $163 gain on the redemption of a BOLI policy. For the first nine months of 2025, noninterest income was $11,522, compared to $10,604 in the same period of 2024. Service charges and fees, wealth management fees, earnings on BOLI policies, and other income increased $308, $147, $392, and $94, respectively. The reasons for the increase in noninterest income for the nine month comparison are the same as the three month comparison.
Noninterest expenses for the three-month period ended September 30, 2025 increased $757 in comparison to the same period in 2024. Compensation and benefit expenses increased $379 reflecting annual merit increases in 2025, incentives, and higher medical insurance claims compared to the third quarter of 2024. Other professional services increased $263 primarily due to a temporary increase in outsourced services. For the first nine months of 2025, noninterest expenses were $41,029, compared to $38,799 in the same period of 2024. Compensation and benefits increased $1,273 for the same reasons as the three month comparison. Other professional service fees increased $797 principally due to $173 of profitability initiative costs, $168 in legal fees related to our Nasdaq uplisting, and temporary increases in outsourced services. Offsetting these increases was a $407 decline in other losses, largely due to fraudulent related activity.
Income tax expense for the three months ended September 30, 2025 and 2024 was $1,036 and $561 and the ETR was 17% and 15%, respectively. The increase in the ETR was primarily due to a higher annual forecast of pretax income. Income tax expense for the first nine months of 2025 was $3,086, compared to $1,684 in the same period of 2024 and the ETR was 18% and 15%, respectively. The ETR in the first nine months of 2025 included a one-time tax expense totaling $166 due to the taxes owed from the lifetime earnings on BOLI policies that were surrendered during the first quarter of 2025. Excluding the one-
43

Table of Contents
time charge, the ETR was 17% for the first nine months of 2025, which is higher than the prior year due to a higher annual forecast of pretax income.
Financial Condition (September 30, 2025 to December 31, 2024 comparison)
Total assets increased $173,413 to $2,259,654 as of September 30, 2025, primarily due to an increase of $127,465 in interest bearing cash, a $22,941 increase in AFS securities, and a $10,769 increase in BOLI policies.
Our AFS securities portfolio totaled $511,970 at September 30, 2025, increasing $22,941 at the end of third quarter 2025. The increase was driven by $62,148 in purchases, offset by amortization and maturities of $52,359. Net unrealized losses at September 30, 2025 totaled $12,564, or 2.40%, of the portfolio and improved during the quarter due to the treasury portfolio rapidly approaching maturity and an increase in bond prices.
Gross loans increased $8,334 to $1,431,905 as of September 30, 2025. While core loans (non-GAAP) grew $66,358, advances to mortgage brokers decreased $58,024 due to lower participation demand from our counterparty. Core loans (non-GAAP) grew $66,358, led by growth in the commercial and industrial and commercial real estate portfolios of $17,509 and $34,924, respectively. Residential mortgages increased $31,184 since year-end 2024 with $13,388 of growth in the third quarter as construction drawdowns and seasonal patterns occurred. Most residential originations were adjustable rate products, which are put on the balance sheet rather than sold in the secondary market. The consumer loan portfolio continues to slowly roll off amid decreasing demand, competition, and our adherence to credit quality standards.
The ACL was $13,149 at September 30, 2025, an increase of $254 from $12,895 at December 31, 2024. The increase is due to core loan growth (non-GAAP), offset by improvement in historical loss experience driven by the recovery of previously charged-off loans during the year. Nonaccrual loans were $3,443 as of September 30, 2025 compared to $282 at December 31, 2024. This increase relates to one commercial real estate loan. Past due and accruing accounts between 30 to 89 days as a percentage of total loans was 0.03% at September 30, 2025, compared to 0.40% at year-end 2024. Overall, credit quality remains strong.
BOLI assets were $45,651 at September 30, 2025, an increase of $10,769 from December 31, 2024. The growth was mostly driven by a $10,583 investment of new policies in a separate account product at the beginning of January. In the first half of 2025, we also surrendered and/or exchanged over $13,000 of existing general account policies and redeployed the funds into a separate account BOLI structure, which yields a higher rate compared to existing general account policies.
Total deposits increased $178,542 from December 31, 2024, to $1,925,602 at September 30, 2025. The growth was driven by demand and money market deposits. Approximately half of the $134,329 increase in money market deposits was driven by one customer with large deposits during the second and third quarters that are expected to be withdrawn by the customer by the end of the year. Consumer demand for retail certificates of deposit accounts continues based on the rate environment, resulting in a $17,207 increase in the balance during the first nine months of 2025.
Total equity was $227,420, or $30.94 per share, at September 30, 2025 compared to $210,276, or $28.32 per share, at year-end 2024. Our tangible book value per share (non-GAAP) was $24.37 as of September 30, 2025, compared to $21.82 on December 31, 2024. Net unrealized losses on AFS securities reduced tangible book value per share (non-GAAP) by $1.36 and $2.82 for the respective periods. Share repurchases totaled 122,502 during the first nine months of 2025 for a value of $3,259 at an average price of $26.60.
We continue to have robust liquidity levels and capital. As of September 30, 2025, we had $975,856 of unencumbered sources of liquidity and strong capital ratios; the Tier 1 Leverage Ratio was 8.71%, Tier 1 risk-based capital was 12.37%, and Total risk-based capital was 15.20%.
44

Table of Contents
Recent Events
On July 4, 2025, the One Big Beautiful Bill Act (the “OBBBA”) was signed into law by President Trump, which includes a broad range of tax reform provisions affecting businesses, including extending and modifying certain key provisions from the Tax Cuts and Jobs Act of 2017 and expanding certain incentives from the Inflation Reduction Act of 2022 while accelerating the phase-out of others. The Corporation continues to evaluate the OBBBA but does not anticipate that the OBBBA will have a material impact on the Corporation’s Consolidated Financial Statements.
Nasdaq Listing
Beginning with the opening of trading on Monday, May 12, 2025, our shares of common stock were listed for trading on The Nasdaq Capital Market under our current symbol, “ISBA.” Prior to this listing on Nasdaq, our shares of common stock were listed on the OTCQX under the same symbol through May 9, 2025.
Reclassifications
Certain amounts reported in the interim 2024 consolidated financial statements have been reclassified to conform to the 2025 presentation.
Subsequent Events
We evaluated subsequent events after September 30, 2025 through the date our interim condensed consolidated financial statements were issued for potential recognition and disclosure. We determined that no subsequent events require financial statement recognition or disclosure between September 30, 2025 and the date our interim condensed consolidated financial statements were issued.
45

Table of Contents
Selected Financial Data (Unaudited)
The following table outlines our results of operations and provides certain performance measures as of, and for the:

| Three Months Ended |  | Nine Months Ended
| September 30 2025 |  | June 30 2025 |  | March 31 2025 |  | December 31 2024 |  | September 30 2024 |  | September 30 2025 |  | September 30 2024
PER SHARE |  |  |  |  |  |  |  |  |  |  |  |  |
Basic earnings | $ | 0.71 |  |  | $ | 0.68 |  |  | $ | 0.53 |  |  | $ | 0.54 |  |  | $ | 0.44 |  |  | $ | 1.93 |  |  | $ | 1.32 |
Diluted earnings | 0.71 |  |  | 0.68 |  |  | 0.53 |  |  | 0.54 |  |  | 0.44 |  |  | 1.92 |  |  | 1.32 |
Dividends | 0.28 |  |  | 0.28 |  |  | 0.28 |  |  | 0.28 |  |  | 0.28 |  |  | 0.84 |  |  | 0.84 |
Book value (1) | 30.94 |  |  | 29.95 |  |  | 29.10 |  |  | 28.32 |  |  | 28.63 |  |  | 30.94 |  |  | 28.63 |
Tangible book value (1) (2) | 24.37 |  |  | 23.39 |  |  | 22.58 |  |  | 21.82 |  |  | 22.14 |  |  | 24.37 |  |  | 22.14 |
Market price (1) | 35.25 |  |  | 30.15 |  |  | 23.59 |  |  | 25.99 |  |  | 21.21 |  |  | 35.25 |  |  | 21.21 |
PERFORMANCE RATIOS |  |  |  |  |  |  |  |  |  |  |  |
Return on average total assets | 0.94 | % |  | 0.96 | % |  | 0.77 | % |  | 0.76 | % |  | 0.62 | % |  | 0.89 | % |  | 0.64 | %
Return on average shareholders' equity | 9.28 | % |  | 9.19 | % |  | 7.48 | % |  | 7.47 | % |  | 6.26 | % |  | 8.67 | % |  | 6.47 | %
Return on average tangible shareholders' equity (2) | 11.83 | % |  | 11.78 | % |  | 9.65 | % |  | 9.66 | % |  | 8.15 | % |  | 11.12 | % |  | 8.48 | %
Net interest margin yield (FTE) | 3.15 | % |  | 3.14 | % |  | 3.06 | % |  | 2.98 | % |  | 2.96 | % |  | 3.12 | % |  | 2.87 | %
Efficiency ratio | 67.51 | % |  | 70.53 | % |  | 71.73 | % |  | 71.08 | % |  | 72.30 | % |  | 69.80 | % |  | 73.65 | %
Gross loan to deposit ratio (1) | 74.36 | % |  | 75.57 | % |  | 76.07 | % |  | 81.48 | % |  | 79.93 | % |  | 74.36 | % |  | 79.93 | %
Shareholders' equity to total assets (1) | 10.06 | % |  | 10.23 | % |  | 10.25 | % |  | 10.08 | % |  | 10.11 | % |  | 10.06 | % |  | 10.11 | %
Tangible shareholders' equity to tangible assets (1) (2) | 8.10 | % |  | 8.17 | % |  | 8.14 | % |  | 7.95 | % |  | 8.00 | % |  | 8.10 | % |  | 8.00 | %
FINANCIAL DATA (in millions) |  |  |  |  |  |  |  |  |  |  |  |
Total assets (1) | $ | 2,260 |  |  | $ | 2,156 |  |  | $ | 2,103 |  |  | $ | 2,086 |  |  | $ | 2,107 |  |  | $ | 2,260 |  |  | $ | 2,107 |
AFS securities (1) | 512 |  |  | 501 |  |  | 513 |  |  | 489 |  |  | 507 |  |  | 512 |  |  | 507 |
Gross loans (1) | 1,432 |  |  | 1,398 |  |  | 1,368 |  |  | 1,424 |  |  | 1,424 |  |  | 1,432 |  |  | 1,424 |
ACL (1) | 13 |  |  | 13 |  |  | 13 |  |  | 13 |  |  | 13 |  |  | 13 |  |  | 13 |
Deposits (1) | 1,926 |  |  | 1,849 |  |  | 1,798 |  |  | 1,747 |  |  | 1,782 |  |  | 1,926 |  |  | 1,782 |
Borrowed funds (1) | 92 |  |  | 73 |  |  | 77 |  |  | 113 |  |  | 97 |  |  | 92 |  |  | 97 |
Shareholders' equity (1) | 227 |  |  | 221 |  |  | 216 |  |  | 210 |  |  | 213 |  |  | 227 |  |  | 213 |
Wealth assets under management (1) | 680 |  |  | 679 |  |  | 657 |  |  | 658 |  |  | 680 |  |  | 680 |  |  | 680 |
Net income | 5 |  |  | 5 |  |  | 4 |  |  | 4 |  |  | 3 |  |  | 14 |  |  | 10 |
Interest income | 25 |  |  | 23 |  |  | 23 |  |  | 23 |  |  | 23 |  |  | 71 |  |  | 67 |
Interest expense | 9 |  |  | 8 |  |  | 8 |  |  | 9 |  |  | 9 |  |  | 25 |  |  | 26 |
Net interest income | 16 |  |  | 15 |  |  | 15 |  |  | 15 |  |  | 14 |  |  | 46 |  |  | 41 |
Provision for (reversal of) credit losses | — |  |  | (1) |  |  | — |  |  | — |  |  | 1 |  |  | (1) |  |  | 2 |
Noninterest income | 4 |  |  | 4 |  |  | 4 |  |  | 4 |  |  | 4 |  |  | 12 |  |  | 11 |
Noninterest expenses | 14 |  |  | 14 |  |  | 13 |  |  | 13 |  |  | 13 |  |  | 41 |  |  | 39 |

(1) At end of period.
(2) Non-GAAP financial measure; refer to the "Reconciliation of Non-GAAP Financial Measures" section of this Form 10-Q.
46

Table of Contents
Average Balances, Interest Rates, and Net Interest Income
The following schedules present the daily average amount outstanding for each major category of interest earning assets, non-earning assets, interest bearing liabilities, and noninterest bearing liabilities. These schedules also present an analysis of interest income and interest expense for the periods indicated. All interest income is reported on a FTE basis using a federal income tax rate of 21%. Loans in nonaccrual status, for the purpose of the following computations, are included in the average loan balances. FRB restricted equity holdings are included in other interest earning assets.

| Three Months Ended
| September 30, 2025 |  | June 30, 2025 |  | September 30, 2024
| Average Balance |  | Tax Equivalent Interest |  | Average Yield / Rate |  | Average Balance |  | Tax Equivalent Interest |  | Average Yield / Rate |  | Average Balance |  | Tax Equivalent Interest |  | Average Yield / Rate
INTEREST EARNING ASSETS |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loans (1) | $ | 1,409,928 |  |  | $ | 20,583 |  |  | 5.78 | % |  | $ | 1,388,684 |  |  | $ | 19,832 |  |  | 5.71 | % |  | $ | 1,403,810 |  |  | $ | 20,230 |  |  | 5.72 | %
AFS securities (2) | 517,286 |  |  | 3,172 |  |  | 2.42 | % |  | 534,352 |  |  | 3,210 |  |  | 2.38 | % |  | 536,379 |  |  | 2,981 |  |  | 2.17 | %
FHLB stock | 5,600 |  |  | 70 |  |  | 4.95 | % |  | 5,600 |  |  | 125 |  |  | 8.94 | % |  | 12,762 |  |  | 168 |  |  | 5.26 | %
Fed funds sold | 186 |  |  | 2 |  |  | 4.35 | % |  | 6 |  |  | — |  |  | 3.83 | % |  | 4 |  |  | — |  |  | 5.36 | %
Other (3) | 123,183 |  |  | 1,233 |  |  | 3.92 | % |  | 20,487 |  |  | 253 |  |  | 4.92 | % |  | 14,597 |  |  | 194 |  |  | 5.18 | %
Total interest earning assets | 2,056,183 |  |  | 25,060 |  |  | 4.83 | % |  | 1,949,129 |  |  | 23,420 |  |  | 4.81 | % |  | 1,967,552 |  |  | 23,573 |  |  | 4.75 | %
NONEARNING ASSETS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allowance for credit losses | (13,057) |  |  |  |  |  |  | (13,369) |  |  |  |  |  |  | (13,125) |  |  |  |  |
Cash and demand deposits due from banks | 25,591 |  |  |  |  |  |  | 22,026 |  |  |  |  |  |  | 25,903 |  |  |  |  |
Premises and equipment | 28,313 |  |  |  |  |  |  | 28,306 |  |  |  |  |  |  | 27,868 |  |  |  |  |
Other assets | 109,692 |  |  |  |  |  |  | 106,595 |  |  |  |  |  |  | 87,002 |  |  |  |  |
Total assets | $ | 2,206,722 |  |  |  |  |  |  | $ | 2,092,687 |  |  |  |  |  |  | $ | 2,095,200 |  |  |  |  |
INTEREST BEARING LIABILITIES |  |  |  |  |  |  |  |  |  |  |  |
Interest bearing demand deposits | $ | 234,105 |  |  | 144 |  |  | 0.24 | % |  | $ | 236,076 |  |  | 220 |  |  | 0.37 | % |  | $ | 232,018 |  |  | 161 |  |  | 0.28 | %
Money market deposits | 534,127 |  |  | 3,533 |  |  | 2.63 | % |  | 449,110 |  |  | 2,857 |  |  | 2.55 | % |  | 451,216 |  |  | 3,148 |  |  | 2.77 | %
Savings | 289,442 |  |  | 560 |  |  | 0.77 | % |  | 286,434 |  |  | 544 |  |  | 0.76 | % |  | 274,828 |  |  | 423 |  |  | 0.61 | %
Certificates of deposit | 399,781 |  |  | 3,775 |  |  | 3.75 | % |  | 395,450 |  |  | 3,770 |  |  | 3.82 | % |  | 375,936 |  |  | 3,899 |  |  | 4.13 | %
Short-term borrowings | 52,700 |  |  | 441 |  |  | 3.32 | % |  | 41,661 |  |  | 324 |  |  | 3.11 | % |  | 48,304 |  |  | 384 |  |  | 3.17 | %
FHLB advances | — |  |  | — |  |  | — | % |  | 11,539 |  |  | 132 |  |  | 4.53 | % |  | 40,435 |  |  | 571 |  |  | 5.52 | %
Subordinated debt, net of unamortized issuance costs | 29,477 |  |  | 267 |  |  | 3.61 | % |  | 29,455 |  |  | 266 |  |  | 3.61 | % |  | 29,388 |  |  | 267 |  |  | 3.62 | %
Total interest bearing liabilities | 1,539,632 |  |  | 8,720 |  |  | 2.25 | % |  | 1,449,725 |  |  | 8,113 |  |  | 2.24 | % |  | 1,452,125 |  |  | 8,853 |  |  | 2.42 | %
NONINTEREST BEARING LIABILITIES AND SHAREHOLDERS' EQUITY |  |  |  |  |  |  |  |
Demand deposits | 428,144 |  |  |  |  |  |  | 409,262 |  |  |  |  |  |  | 418,973 |  |  |  |  |
Other liabilities | 14,976 |  |  |  |  |  |  | 14,158 |  |  |  |  |  |  | 15,658 |  |  |  |  |
Shareholders’ equity | 223,970 |  |  |  |  |  |  | 219,542 |  |  |  |  |  |  | 208,444 |  |  |  |  |
Total liabilities and shareholders’ equity | $ | 2,206,722 |  |  |  |  |  |  | $ | 2,092,687 |  |  |  |  |  |  | $ | 2,095,200 |  |  |  |  |
Net interest income (FTE) |  |  | $ | 16,340 |  |  |  |  |  |  | $ | 15,307 |  |  |  |  |  |  | $ | 14,720 |  |  |
Net yield on interest earning assets (FTE) |  | 3.15 | % |  |  |  |  |  | 3.14 | % |  |  |  |  |  | 2.96 | %

47

Table of Contents

| Nine Months Ended
| September 30, 2025 |  | September 30, 2024
| Average Balance |  | Tax Equivalent Interest |  | Average Yield/Rate |  | Average Balance |  | Tax Equivalent Interest |  | Average Yield/Rate
INTEREST EARNING ASSETS |  |  |  |  |  |  |  |  |  |  |
Loans (1) | $ | 1,389,936 |  |  | $ | 59,763 |  |  | 5.75 | % |  | $ | 1,376,122 |  |  | $ | 57,150 |  |  | 5.55 | %
AFS securities (2) | 522,049 |  |  | 9,210 |  |  | 2.34 | % |  | 546,376 |  |  | 9,153 |  |  | 2.23 | %
FHLB stock | 7,384 |  |  | 355 |  |  | 6.41 | % |  | 12,762 |  |  | 472 |  |  | 4.93 | %
Fed funds sold | 66 |  |  | 2 |  |  | 4.35 | % |  | 6 |  |  | — |  |  | 5.35 | %
Other (3) | 63,959 |  |  | 1,968 |  |  | 3.92 | % |  | 17,941 |  |  | 750 |  |  | 5.49 | %
Total interest earning assets | 1,983,394 |  |  | 71,298 |  |  | 4.80 | % |  | 1,953,207 |  |  | 67,525 |  |  | 4.62 | %
NONEARNING ASSETS |  |  |  |  |  |  |  |  |  |  |
Allowance for credit losses | (13,104) |  |  |  |  |  |  | (13,216) |  |  |  |  |
Cash and demand deposits due from banks | 23,844 |  |  |  |  |  |  | 24,623 |  |  |  |  |
Premises and equipment | 28,195 |  |  |  |  |  |  | 27,962 |  |  |  |  |
Other assets | 106,430 |  |  |  |  |  |  | 83,878 |  |  |  |  |
Total assets | $ | 2,128,759 |  |  |  |  |  |  | $ | 2,076,454 |  |  |  |  |
INTEREST BEARING LIABILITIES |  |  |  |  |  |  |  |  |  |  |
Interest bearing demand deposits | $ | 236,989 |  |  | 606 |  |  | 0.34 | % |  | $ | 238,703 |  |  | 542 |  |  | 0.30 | %
Money market deposits | 481,571 |  |  | 9,319 |  |  | 2.59 | % |  | 445,604 |  |  | 9,437 |  |  | 2.83 | %
Savings | 287,425 |  |  | 1,642 |  |  | 0.76 | % |  | 280,447 |  |  | 1,154 |  |  | 0.55 | %
Certificates of deposit | 394,395 |  |  | 11,299 |  |  | 3.83 | % |  | 366,672 |  |  | 10,974 |  |  | 4.00 | %
Short-term borrowings | 46,008 |  |  | 1,106 |  |  | 3.21 | % |  | 43,197 |  |  | 1,026 |  |  | 3.18 | %
FHLB advances | 4,945 |  |  | 170 |  |  | 4.53 | % |  | 37,883 |  |  | 1,597 |  |  | 5.54 | %
Subordinated debt, net of unamortized issuance costs | 29,455 |  |  | 799 |  |  | 3.61 | % |  | 29,365 |  |  | 799 |  |  | 3.63 | %
Total interest bearing liabilities | 1,480,788 |  |  | 24,941 |  |  | 2.25 | % |  | 1,441,871 |  |  | 25,529 |  |  | 2.36 | %
NONINTEREST BEARING LIABILITIES AND SHAREHOLDERS' EQUITY |  |  |  |  |  |  |  |
Demand deposits | 413,568 |  |  |  |  |  |  | 414,179 |  |  |  |  |
Other liabilities | 15,131 |  |  |  |  |  |  | 16,183 |  |  |  |  |
Shareholders’ equity | 219,272 |  |  |  |  |  |  | 204,221 |  |  |  |  |
Total liabilities and shareholders’ equity | $ | 2,128,759 |  |  |  |  |  |  | $ | 2,076,454 |  |  |  |  |
Net interest income (FTE) |  |  | $ | 46,357 |  |  |  |  |  |  | $ | 41,996 |  |  |
Net yield on interest earning assets (FTE) |  |  |  |  | 3.12 | % |  |  |  |  |  | 2.87 | %

(1) Includes loans HFS and nonaccrual loans.
(2) Average balances for AFS securities are based on amortized cost.
(3) Includes average interest-bearing deposits with other banks, net of Federal Reserve daily cash letter.
48

Table of Contents
Loans
The following table displays loan balances as of:

| September 30 2025 |  | June 30 2025 |  | March 31 2025 |  | December 31 2024 |  | September 30 2024 |  | Annualized Growth % Quarter to Date |  | Annualized Growth % Year to Date
Commercial and industrial | $ | 218,132 |  |  | $ | 207,719 |  |  | $ | 205,172 |  |  | $ | 200,623 |  |  | $ | 197,372 |  |  | 20.05 | % |  | 11.64 | %
Commercial real estate | 626,642 |  |  | 614,383 |  |  | 596,282 |  |  | 591,718 |  |  | 590,255 |  |  | 7.98 | % |  | 7.87 | %
Advances to mortgage brokers | 5,056 |  |  | 3,005 |  |  | 3,015 |  |  | 63,080 |  |  | 76,187 |  |  | N/M |  | (122.65) | %
Agricultural | 97,794 |  |  | 96,842 |  |  | 94,359 |  |  | 99,694 |  |  | 96,794 |  |  | 3.93 | % |  | (2.54) | %
Total commercial loans | 947,624 |  |  | 921,949 |  |  | 898,828 |  |  | 955,115 |  |  | 960,608 |  |  | 11.14 | % |  | (1.05) | %
Residential real estate | 412,056 |  |  | 398,668 |  |  | 387,348 |  |  | 380,872 |  |  | 369,846 |  |  | 13.43 | % |  | 10.92 | %
Consumer | 72,225 |  |  | 76,896 |  |  | 81,548 |  |  | 87,584 |  |  | 93,829 |  |  | (24.30) | % |  | (23.38) | %
Total | $ | 1,431,905 |  |  | $ | 1,397,513 |  |  | $ | 1,367,724 |  |  | $ | 1,423,571 |  |  | $ | 1,424,283 |  |  | 9.84 | % |  | 0.78 | %

The following table presents the composition of our commercial real estate portfolio by industry as of:

| September 30, 2025 |  | December 31, 2024
| Balance |  | Percent of Total |  | Balance |  | Percent of Total
Residential |  |  |  |  |  |  |
1-4 family investor | $ | 91,307 |  |  | 14.57 | % |  | $ | 86,736 |  |  | 14.66 | %
Multifamily | 71,148 |  |  | 11.35 | % |  | 61,033 |  |  | 10.31 | %
Real estate | 171,139 |  |  | 27.31 | % |  | 158,739 |  |  | 26.83 | %
Hotels | 85,935 |  |  | 13.71 | % |  | 83,756 |  |  | 14.15 | %
Health care | 55,397 |  |  | 8.84 | % |  | 50,083 |  |  | 8.46 | %
Retail trade | 33,139 |  |  | 5.29 | % |  | 35,063 |  |  | 5.93 | %
Manufacturing | 19,129 |  |  | 3.05 | % |  | 17,030 |  |  | 2.88 | %
Accommodation services | 15,781 |  |  | 2.52 | % |  | 16,804 |  |  | 2.84 | %
Construction | 14,259 |  |  | 2.28 | % |  | 12,825 |  |  | 2.17 | %
Educational services | 10,727 |  |  | 1.71 | % |  | 11,160 |  |  | 1.89 | %
Wholesale trade | 11,262 |  |  | 1.80 | % |  | 11,073 |  |  | 1.87 | %
Other | 47,419 |  |  | 7.57 | % |  | 47,416 |  |  | 8.01 | %
Total commercial real estate | $ | 626,642 |  |  | 100.00 | % |  | $ | 591,718 |  |  | 100.00 | %

Commercial real estate loans are subject to a varying degree of risk from changes in interest rates and economic conditions. To control these risks, we maintain strict underwriting standards, lending limits to a single borrower, loan to collateral value limits, and a defined market area. We also monitor and limit loan concentrations to specific industries. Our practices also include appropriate loan reviews, and monitoring of past due levels, concentrations, industry trends, and other qualitative factors.
Deposits
The following table displays deposit balances as of:

| September 30 2025 |  | June 30 2025 |  | March 31 2025 |  | December 31 2024 |  | September 30 2024 |  | Annualized Growth % Quarter to Date |  | Annualized Growth % Year to Date
Noninterest bearing demand deposits | $ | 421,027 |  |  | $ | 493,477 |  |  | $ | 404,194 |  |  | $ | 416,373 |  |  | $ | 421,493 |  |  | (58.73) | % |  | 1.49 | %
Interest bearing demand deposits | 248,666 |  |  | 223,376 |  |  | 243,939 |  |  | 237,548 |  |  | 228,902 |  |  | 45.29 | % |  | 6.24 | %
Money market deposits | 558,212 |  |  | 446,845 |  |  | 473,138 |  |  | 423,883 |  |  | 471,745 |  |  | 99.69 | % |  | 42.25 | %
Savings | 292,899 |  |  | 289,746 |  |  | 286,399 |  |  | 281,665 |  |  | 276,095 |  |  | 4.35 | % |  | 5.32 | %
Certificates of deposit | 404,798 |  |  | 395,932 |  |  | 390,239 |  |  | 387,591 |  |  | 383,597 |  |  | 8.96 | % |  | 5.92 | %
Total | $ | 1,925,602 |  |  | $ | 1,849,376 |  |  | $ | 1,797,909 |  |  | $ | 1,747,060 |  |  | $ | 1,781,832 |  |  | 16.49 | % |  | 13.63 | %

49

Table of Contents
Asset Quality Analysis
The following table outlines our asset quality analysis as of, and for the three-month periods ended:

| September 30 2025 |  | June 30 2025 |  | March 31 2025 |  | December 31 2024 |  | September 30 2024
NONPERFORMING ASSETS |  |  |  |  |  |  |  |  |
Commercial and industrial | $ | 16 |  |  | $ | 17 |  |  | $ | — |  |  | $ | — |  |  | $ | 120 |
Commercial real estate | 3,000 |  |  | 533 |  |  | — |  |  | — |  |  | — |
Agricultural | — |  |  | — |  |  | — |  |  | — |  |  | — |
Residential real estate | 427 |  |  | 614 |  |  | 173 |  |  | 282 |  |  | 427 |
Consumer | — |  |  | — |  |  | — |  |  | — |  |  | — |
Total nonaccrual loans | 3,443 |  |  | 1,164 |  |  | 173 |  |  | 282 |  |  | 547 |
Accruing loans past due 90 days or more | 18 |  |  | 31 |  |  | 26 |  |  | 19 |  |  | 64 |
Total nonperforming loans | 3,461 |  |  | 1,195 |  |  | 199 |  |  | 301 |  |  | 611 |
Foreclosed assets | 1,018 |  |  | 667 |  |  | 649 |  |  | 544 |  |  | 546 |
Debt securities | — |  |  | — |  |  | — |  |  | — |  |  | 12 |
Total nonperforming assets | $ | 4,479 |  |  | $ | 1,862 |  |  | $ | 848 |  |  | $ | 845 |  |  | $ | 1,169 |
Nonperforming loans to gross loans | 0.24 | % |  | 0.09 | % |  | 0.01 | % |  | 0.02 | % |  | 0.04 | %
Nonperforming assets to total assets | 0.20 | % |  | 0.09 | % |  | 0.04 | % |  | 0.04 | % |  | 0.06 | %
Nonaccrual loans to gross loans | 0.24 | % |  | 0.08 | % |  | 0.01 | % |  | 0.02 | % |  | 0.04 | %
ACL as a % of nonaccrual loans | 381.91 | % |  | N/M |  | N/M |  | N/M |  | N/M
ALLOWANCE FOR CREDIT LOSSES |  |  |  |  |  |
Allowance at beginning of period | $ | 12,977 |  |  | $ | 12,735 |  |  | $ | 12,895 |  |  | $ | 12,635 |  |  | $ | 13,095 |
Charge-offs | 175 |  |  | 390 |  |  | 172 |  |  | 299 |  |  | 1,767 |
Recoveries | 101 |  |  | 1,822 |  |  | 224 |  |  | 197 |  |  | 408 |
Net loan charge-offs (recoveries) | 74 |  |  | (1,432) |  |  | (52) |  |  | 102 |  |  | 1,359 |
(Reversal of) provision for credit losses - loans | 246 |  |  | (1,190) |  |  | (212) |  |  | 362 |  |  | 899 |
Allowance at end of period | $ | 13,149 |  |  | $ | 12,977 |  |  | $ | 12,735 |  |  | $ | 12,895 |  |  | $ | 12,635 |
ACL to gross loans | 0.92 | % |  | 0.93 | % |  | 0.93 | % |  | 0.91 | % |  | 0.89 | %
Reserve for unfunded commitments | 671 |  |  | 708 |  |  | 617 |  |  | 512 |  |  | 498 |
Provision for credit losses - unfunded commitments | (37) |  |  | 91 |  |  | 105 |  |  | 14 |  |  | 47 |
Reserve to unfunded commitments | 0.16 | % |  | 0.16 | % |  | 0.14 | % |  | 0.15 | % |  | 0.15 | %
NET LOAN CHARGE-OFFS (RECOVERIES) |  |  |  |  |  |
Commercial and industrial | $ | (6) |  |  | $ | 68 |  |  | $ | (80) |  |  | $ | 13 |  |  | $ | (6) |
Commercial real estate | (4) |  |  | (50) |  |  | (2) |  |  | (2) |  |  | (318) |
Agricultural | — |  |  | — |  |  | — |  |  | (4) |  |  | — |
Residential real estate | (16) |  |  | (16) |  |  | (13) |  |  | (16) |  |  | (20) |
Consumer | 100 |  |  | (1,434) |  |  | 43 |  |  | 111 |  |  | 1,703 |
Total | $ | 74 |  |  | $ | (1,432) |  |  | $ | (52) |  |  | $ | 102 |  |  | $ | 1,359 |
Net (recoveries) charge-offs (Quarter to Date annualized to average loans) | 0.02 | % |  | (0.41) | % |  | (0.02) | % |  | 0.03 | % |  | 0.39 | %
Net (recoveries) charge-offs (Year to Date annualized to average loans) | (0.14) | % |  | (0.22) | % |  | (0.02) | % |  | 0.14 | % |  | 0.17 | %
DELINQUENT AND NONACCRUAL LOANS |  |  |  |  |  |
Accruing loans 30-89 days past due | $ | 500 |  |  | $ | 1,076 |  |  | $ | 5,555 |  |  | $ | 5,682 |  |  | $ | 2,226 |
Accruing loans past due 90 days or more | 18 |  |  | 31 |  |  | 26 |  |  | 19 |  |  | 64 |
Total accruing past due loans | 518 |  |  | 1,107 |  |  | 5,581 |  |  | 5,701 |  |  | 2,290 |
Nonaccrual loans | 3,443 |  |  | 1,164 |  |  | 173 |  |  | 282 |  |  | 547 |
Total past due and nonaccrual loans | $ | 3,961 |  |  | $ | 2,271 |  |  | $ | 5,754 |  |  | $ | 5,983 |  |  | $ | 2,837 |

50

Table of Contents
Capital
Capital consists solely of common stock, retained earnings, and accumulated other comprehensive income (loss). We are authorized to raise capital through dividend reinvestment, employee and director stock purchases, and shareholder stock purchases. Pursuant to these authorizations, we issued 36,809 shares or $1,031 of common stock during the first nine months of 2025, as compared to 61,560 shares or $1,190 of common stock during the same period in 2024. We offer the Directors Plan in which participants purchase stock units through deferred fees, in lieu of cash payments. Pursuant to this plan, we increased shareholders’ equity by $233 and $332 during the nine-month periods ended September 30, 2025 and 2024, respectively. We also grant restricted stock awards pursuant to the RSP. Pursuant to this plan, we increased shareholders’ equity by $45 during the first nine months of 2025, as compared to $71 during the same period in 2024.
We have publicly announced a common stock repurchase program. Pursuant to this repurchase program, we repurchased 122,502 shares or $3,259 of common stock during the first nine months of 2025 and 124,969 shares or $2,419 of common stock during the first nine months of 2024. As of September 30, 2025, we were authorized to repurchase up to an additional 495,727 shares of common stock under the repurchase program.
The FRB has established minimum risk-based capital guidelines. Pursuant to these guidelines, a framework has been established that assigns risk weights to each category of on and off-balance-sheet items to arrive at risk adjusted total assets. Regulatory capital is divided by the risk adjusted assets with the resulting ratio compared to the minimum standard to determine whether a corporation has adequate capital. At September 30, 2025, we and the Bank were “well capitalized” under the regulatory framework for prompt corrective action. Management believes that no conditions or events have occurred since September 30, 2025 that would materially adversely change such capital classifications. From time to time, we may need to raise additional capital to support our and the Bank’s further growth and to maintain our “well capitalized” status.
The following table sets forth our consolidated capital ratios as of:

| September 30 2025 |  | June 30 2025 |  | March 31 2025 |  | December 31 2024 |  | September 30 2024
Common equity tier 1 capital | 12.37 | % |  | 12.46 | % |  | 12.58 | % |  | 12.21 | % |  | 12.08 | %
Tier 1 capital | 12.37 | % |  | 12.46 | % |  | 12.58 | % |  | 12.21 | % |  | 12.08 | %
Total capital | 15.20 | % |  | 15.34 | % |  | 15.50 | % |  | 15.06 | % |  | 14.90 | %
Tier 1 leverage | 8.71 | % |  | 9.04 | % |  | 8.96 | % |  | 8.86 | % |  | 8.77 | %

Liquidity
Liquidity is monitored regularly by our ALCO, which consists of members of senior management. The committee reviews projected cash flows, key ratios, and liquidity available from both primary and secondary sources.
Our primary sources of liquidity are retail deposits, cash and cash equivalents, and unencumbered AFS securities. Cash, cash equivalents and unencumbered AFS securities totaled $487,212, or 21.56% of assets, as of September 30, 2025, compared to $330,876, or 15.86%, as of December 31, 2024. The increase in the amount and percentage of primary liquidity is a direct result of an increase in cash, driven by deposit growth. Liquidity is important for financial institutions because of their need to meet loan funding commitments, depositor withdrawal requests, and various other commitments including expansion of operations, investment opportunities, and payment of cash dividends. Based on these same factors, daily liquidity could vary significantly.
Our secondary sources include the ability to borrow from the FHLB, from the FRB, and through various correspondent banks in the form of federal funds purchased and lines of credit. These funding methods typically carry a higher interest rate than traditional market deposit accounts. Some borrowed funds, including FHLB advances, FRB Discount Window advances, and repurchase agreements, require us to pledge assets, typically in the form of AFS securities or loans, as collateral. As of September 30, 2025, we had available lines of credit of $384,555.
We monitor our daily liquidity position to meet our cash flow needs. We also forecast anticipated funding needs for changes in interest rates and economic conditions, the scheduled maturity and interest rate sensitivity of the investment and loan portfolios and deposits, and regulatory capital requirements. Our liquidity stress testing is designed with consideration of these and other factors that could pose undue risk to liquidity.
51

Table of Contents
Our liquidity position remained strong at September 30, 2025, which is illustrated in the following table:

| September 30 2025 |  | June 30 2025 |  | March 31 2025 |  | December 31 2024 |  | September 30 2024
Total cash and cash equivalents | $ | 161,301 |  |  | $ | 108,554 |  |  | $ | 69,179 |  |  | $ | 24,542 |  |  | $ | 27,378 |
Brokered CD capacity | 130,000 |  |  | 120,000 |  |  | 120,000 |  |  | 120,000 |  |  | 120,000 |
Available lines of credit |  |  |  |  |  |  |  |  |
Fed funds lines with correspondent banks | 93,000 |  |  | 93,000 |  |  | 93,000 |  |  | 93,000 |  |  | 93,000 |
FHLB borrowings | 257,288 |  |  | 249,890 |  |  | 250,884 |  |  | 215,432 |  |  | 233,552 |
FRB Discount Window | 29,267 |  |  | 29,084 |  |  | 28,940 |  |  | 28,698 |  |  | 28,888 |
Other lines of credit | 5,000 |  |  | 5,000 |  |  | 5,000 |  |  | 5,000 |  |  | 5,000 |
Total available lines of credit | 384,555 |  |  | 376,974 |  |  | 377,824 |  |  | 342,130 |  |  | 360,440 |
Unencumbered lendable value of FRB collateral, estimated (1) | 300,000 |  |  | 320,000 |  |  | 340,000 |  |  | 290,000 |  |  | 290,000 |
Total cash and liquidity | $ | 975,856 |  |  | $ | 925,528 |  |  | $ | 907,003 |  |  | $ | 776,672 |  |  | $ | 797,818 |
Uninsured deposits | $ | 726,514 |  |  | $ | 726,240 |  |  | $ | 687,341 |  |  | $ | 645,764 |  |  | $ | 687,990 |
Coverage ratio of uninsured deposits with total cash and liquidity | 134 | % |  | 127 | % |  | 132 | % |  | 120 | % |  | 116 | %

(1) In cludes estimated unencumbered lendable value of FHLB collateral of $230,000 as of September 30, 2025.
Fair Value
We utilize fair value measurements to record fair value adjustments to certain assets and liabilities and to determine fair value disclosures. AFS securities, cash flow hedge derivative instruments and certain liabilities are recorded at fair value on a recurring basis. Additionally, from time to time, we may be required to record at fair value other assets on a nonrecurring basis, such as mortgage loans AFS, collateral dependent loans, goodwill, foreclosed assets, OMSR, and certain other assets and liabilities. These nonrecurring fair value adjustments typically involve the application of lower of cost or market accounting or write downs of individual assets.
For further information regarding fair value measurements see “Note 7 – Fair Value” of our interim condensed consolidated financial statements included with this Form 10-Q.
Interest Rate Sensitivity and Market Risk
As a financial institution, our primary market risks are interest rate risk and liquidity risk. IRR is the exposure of our net interest income to changes in interest rates. IRR results from the difference in the maturity or repricing frequency of a financial institution's interest earning assets and its interest-bearing liabilities. Managing IRR is the fundamental method by which financial institutions earn income and create shareholder value. Excessive exposure to IRR could pose a significant risk to our earnings and capital.
The FRB has adopted a policy requiring banks to effectively manage the various risks that can have a material impact on safety and soundness. The risks include credit, interest rate, liquidity, operational, and reputational. We have policies, procedures, and internal controls for measuring and managing these risks. Specifically, our ALCO policy and procedures include defining acceptable types and terms of investments and funding sources, liquidity requirements, limits on investments in long-term assets, limiting the mismatch in repricing opportunities of assets and liabilities, and the frequency of measuring and reporting to our Board of Directors.
The primary technique to measure IRR is simulation analysis. Simulation analysis forecasts the effects on the balance sheet structure and net interest income under a variety of scenarios that incorporate changes in interest rates, the shape of yield curves, interest rate relationships, loan prepayments, and funding sources. These forecasts are compared against net interest income projected in a stable interest rate environment. While many assets and liabilities reprice either at maturity or in accordance with their contractual terms, several balance sheet components demonstrate characteristics that require an evaluation to more accurately reflect their repricing behavior. Key assumptions in the simulation analysis include prepayments on loans, probable calls of investment securities, changes in market conditions, loan volumes and loan pricing, deposit sensitivity, and customer preferences. These assumptions are inherently uncertain as they are subject to fluctuation and revision in a dynamic rate environment. As a result, the simulation analysis cannot precisely forecast the impact of rising and falling interest rates on net interest income. Actual results will differ from simulated results due to many other factors, including changes in balance
52

Table of Contents
sheet components, interest rate changes, changes in market conditions, and management strategies. We regularly monitor our projected net interest income sensitivity to ensure that it remains within established limits.
Gap analysis, the secondary method to measure IRR, measures the cash flows and/or the earliest repricing of our interest-bearing assets and liabilities. This analysis is useful for measuring trends in the repricing characteristics of the balance sheet. Significant assumptions are required in this process because of the embedded repricing options contained in assets and liabilities. Residential real estate and consumer loans allow the borrower to repay the balance prior to maturity without penalty, while commercial and agricultural loans may have prepayment penalties. The amount of prepayments is dependent upon many factors, including the interest rate of a given loan in comparison to the current offering rates, the level of home sales, and the overall availability of credit in the marketplace. Generally, a decrease in interest rates will result in an increase in cash flows from these assets. Savings and demand accounts may generally be withdrawn on request without prior notice. The timing of cash flows from these deposits is estimated based on historical experience. Certificates of deposit have penalties that discourage early withdrawals.
Gap analysis is also utilized as a method to measure interest rate sensitivity. Interest rate sensitivity is determined by the amount of earning assets and interest-bearing liabilities repricing within a specific time period, and their relative sensitivity to a change in interest rates. We strive to achieve reasonable stability in the net interest margin through periods of changing interest rates.
We do not believe there has been a material change in the nature or categories of our primary market risk exposure, or the particular markets that present the primary risk of loss. We do not know of or expect there to be any material change in the general nature of our primary market risk exposure in the near term, and we do not expect to make material changes to our market risk methods in the near term. We may change those methods in the future to adapt to changes in circumstances or to implement new techniques.
Contractual Obligations and Loan Commitments
We have various financial obligations, including contractual obligations and commitments related to deposits and borrowings, which may require future cash payments. We also have loan related commitments that may impact liquidity. The commitments include unused lines of credit, commercial and standby letters of credit, and commitments to grant loans. These commitments to grant loans include residential mortgage loans with the majority committed to be sold to the secondary market. Many of these commitments historically have expired without being drawn upon and do not necessarily represent our future cash requirements.
We are party to credit related financial instruments with off-balance-sheet risk. These financial instruments are entered into in the normal course of business to meet the financing needs of our customers. These financial instruments involve, to varying degrees, elements of credit and interest rate risk in excess of the amounts recognized in the consolidated balance sheets. The contractual or notional amounts of these instruments reflect the extent of involvement we have in a particular class of financial instrument.
Our exposure to credit-related loss in the event of nonperformance by the counterparties to the financial instruments for commitments to extend credit and standby letters of credit could be up to the contractual notional amount of those instruments. We use the same credit policies when analyzing the creditworthiness of counterparties as we do for extending loans to customers. No significant losses are anticipated as a result of these commitments.
Reconciliation of Non-GAAP Financial Measures
The following tables provide a detailed analysis, and reconciliation for, our non-GAAP financial measures as of:

|  | September 30 2025 |  | June 30 2025 |  | March 31 2025 |  | December 31 2024 |  | September 30 2024
Gross loans |  | $ | 1,431,905 |  |  | $ | 1,397,513 |  |  | $ | 1,367,724 |  |  | $ | 1,423,571 |  |  | $ | 1,424,283 |
Advances to mortgage brokers |  | 5,056 |  |  | 3,005 |  |  | 3,015 |  |  | 63,080 |  |  | 76,187 |
Core loans |  | $ | 1,426,849 |  |  | $ | 1,394,508 |  |  | $ | 1,364,709 |  |  | $ | 1,360,491 |  |  | $ | 1,348,096 |
Total shareholders’ equity |  | $ | 227,420 |  |  | $ | 220,500 |  |  | $ | 215,556 |  |  | $ | 210,276 |  |  | $ | 212,985 |
Goodwill and other intangible assets |  | 48,282 |  |  | 48,282 |  |  | 48,282 |  |  | 48,283 |  |  | 48,283 |
Tangible equity | (A) | 179,138 |  |  | 172,218 |  |  | 167,274 |  |  | 161,993 |  |  | 164,702 |
Common shares outstanding (1) | (B) | 7,350,567 |  |  | 7,361,684 |  |  | 7,408,010 |  |  | 7,424,893 |  |  | 7,438,720 |
Tangible book value per share | (A/B) | $ | 24.37 |  |  | $ | 23.39 |  |  | $ | 22.58 |  |  | $ | 21.82 |  |  | $ | 22.14 |

(1) Whole shares.
53

Table of Contents
Item 3. Quantitative and Qualitative Disclosures about Market Risk.
The information presented in the section captioned “Interest Rate Sensitivity and Market Risk” in Part I, Item 2, “Management's Discussion and Analysis of Financial Condition and Results of Operations,” of this Form 10-Q is incorporated herein by reference.
Item 4. Controls and Procedures.
DISCLOSURE CONTROLS AND PROCEDURES
We carried out an evaluation, under the supervision and with the participation of the Principal Executive Officer and Principal Financial Officer, of the effectiveness of the design and operation of our disclosure controls and procedures (as such term is defined in Rules 13a-15(e) and 15(d)-15(e) under the Exchange Act) as of September 30, 2025, pursuant to Exchange Act Rule 13a-15. Based upon that evaluation, the Principal Executive Officer and Principal Financial Officer concluded that our disclosure controls and procedures as of September 30, 2025, were effective to ensure that information required to be disclosed in reports that we file or submit under the Exchange Act are recorded, processed, summarized and reported within the time periods specified in SEC rules and forms.
CHANGES IN INTERNAL CONTROL OVER FINANCIAL REPORTING
During the most recent fiscal quarter, no change occurred in our internal control over financial reporting that materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.
54

Table of Contents
PART II – OTHER INFORMATION
Item 1. Legal Proceedings.
We are not involved in any material legal proceedings. We are involved in ordinary, routine litigation incidental to our business; however, no such routine proceedings are expected to result in any material adverse effect on operations, earnings, financial condition, or cash flows.
Item 1A. Risk Factors.
In evaluating an investment in any of our securities, investors should consider carefully, among other things, information under the heading “Cautionary Notice Regarding Forward-Looking Statements” in Part I, Item 2, “Management's Discussion and Analysis of Financial Condition and Results of Operations,” of this Form 10-Q and the risk factors previously disclosed under the heading “Risk Factors” in Part I, Item 1A of our 2024 Annual Report on Form 10-K. Management believes there have been no material changes in the risk factors disclosed by the Corporation in Part I, Item 1A, “Risk Factors,” of the 2024 Annual Report on Form 10-K. Additional risks and uncertainties not currently known to us or that we currently deem to be immaterial also may materially adversely affect our business, financial condition and/or operating results.
During 2025, the Corporation identified and added the following risk factor. This risk factor should be considered when reviewing the risk factors previously disclosed by the Corporation under the heading “Risk Factors” in Part I, Item 1A of our 2024 Annual Report on Form 10-K.
An active public trading market may not be sustained.
We completed our Nasdaq uplisting, and the Company’s common stock began trading on the Nasdaq Capital Market, on May 12, 2025. An active trading market for shares of our common stock may not be sustained. If an active trading market is not sustained, you may have difficulty selling your shares of our common stock at an attractive price, or at all. Consequently, you may not be able to sell your shares of our common stock at or above an attractive price at the time that you would like to sell.
Item 2. Unregistered Sales of Equity Securities, Use of Proceeds, and Issuer Purchases of Equity Securities.
(A)None
(B)None
(C)Repurchases of Common Stock
We have adopted and publicly announced a common stock repurchase program. The repurchase program was last amended on April 30, 2025, to allow for the repurchase of an additional 500,000 shares of common stock after that date. These authorizations do not have expiration dates. As common shares are repurchased under this repurchase program, they are retired with the status of authorized, but unissued, shares.
The following table provides information for the three-month period ended September 30, 2025, with respect to the Corporation's share repurchase activity:

| Common Shares Repurchased |  | Total Number of Common Shares Purchased as Part of Publicly Announced Plan or Program |  | Maximum Number of Common Shares That May Yet Be Purchased Under the Plans or Programs
| Number |  | Average Price Per Common Share |  |
June 30, 2025 |  |  |  |  |  |  | 514,823 |
July 1 - 31 | 5,953 |  |  | $ | 30.91 |  |  | 5,953 |  |  | 508,870 |
August 1 - 31 | 2,757 |  |  | 32.64 |  |  | 2,757 |  |  | 506,113 |
September 1 - 30 | 10,386 |  |  | 32.45 |  |  | 10,386 |  |  | 495,727 |
September 30, 2025 | 19,096 |  |  | $ | 32.00 |  |  | 19,096 |  |  | 495,727 |

Item 3. Defaults Upon Senior Securities.
Not applicable.
Item 4. Mine Safety Disclosures.
Not applicable.
55

Table of Contents
Item 5. Other Information.
Securities Trading Plans of Executive Officers
During the fiscal quarter ended September 30, 2025, none of the Corporation’s directors or officers adopted, modified or terminated a “Rule 10b5-1 trading arrangement” or a “non-Rule 10b5-1 trading arrangement,” in each case as defined in Item 408 of Regulation S-K.
Item 6. Exhibits.
(a) Exhibits

Exhibit Number |  | Exhibits
3.1 |  | Amended Articles of Incorporation (1)
3.2 |  | Amendment to the Articles of Incorporation (2)
3.3 |  | Amendment to the Articles of Incorporation (3)
3.4 |  | Amendment to the Articles of Incorporation (4)
3.5 |  | Amendment to the Articles of Incorporation (5)
3.6 |  | Second A mended and Restated Bylaws, as amended on September 24, 2025 (6)
31.1 |  | Certification pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 by the Principal Executive Officer
31.2 |  | Certification pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 by the Principal Financial Officer
32 |  | Section 1350 Certification of Principal Executive Officer and Principal Financial Officer
101.1* |  | 101.INS (Inline XBRL Instance Document)
|  | 101.SCH (Inline XBRL Taxonomy Extension Schema Document)
|  | 101.CAL (Inline XBRL Calculation Linkbase Document)
|  | 101.LAB (Inline XBRL Taxonomy Label Linkbase Document)
|  | 101.DEF (Inline XBRL Taxonomy Linkbase Document)
|  | 101.PRE (Inline XBRL Taxonomy Presentation Linkbase Document)
104 |  | Cover Page Interactive Data File

* |  | In accordance with Rule 406T of Regulations S-T, the XBRL related information shall not be deemed to be “filed” for purposes of Section 18 of the Exchange Act, or otherwise subject to the liability of that section, and shall not be part of any registration statement or other document filed under the Securities Act or the Exchange Act, except as shall be expressly set forth by specific reference in such filing.
(1) |  | Previously filed as an Exhibit to the Isabella Bank Corporation Form 10-K, filed March 12, 1991, and incorporated herein by reference
(2) |  | Previously filed as an Exhibit to the Isabella Bank Corporation Form 10-K, filed March 26, 1994, and incorporated herein by reference.
(3) |  | Previously filed as an Exhibit to Isabella Bank Corporation Form 10-K, filed March 22, 2000, and incorporated herein by reference.
(4) |  | Previously filed as an Exhibit to Isabella Bank Corporation Form 10-K, filed March 27, 2001, and incorporated herein by reference.
(5) |  | Previously filed as an Exhibit to Isabella Bank Corporation Form 8-K, filed May 16, 2008, and incorporated herein by reference.
(6) |  | Previously filed as an Exhibit to Isabella Bank Corporation Form 8-K, filed September 30, 2025, and incorporated herein by reference.

56

Table of Contents
SIGNATURES
Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

|  | Isabella Bank Corporation
Date: | November 10, 2025 |  |  | /s/ Jerome E. Schwind
|  |  |  | Jerome E. Schwind
|  |  |  | President and Chief Executive Officer
|  |  |  | (Principal Executive Officer)
Date: | November 10, 2025 |  |  | /s/ Neil M. McDonnell
|  |  |  | Neil M. McDonnell
|  |  |  | Isabella Bank President and Interim Chief Financial Officer
|  |  |  | (Principal Financial Officer)

57