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        <OtherCompensationAmt>40462</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <TotalReportableCompFromOrgAmt>3478135</TotalReportableCompFromOrgAmt>
      <TotReportableCompRltdOrgAmt>0</TotReportableCompRltdOrgAmt>
      <TotalOtherCompensationAmt>1228856</TotalOtherCompensationAmt>
      <IndivRcvdGreaterThan100KCnt>167</IndivRcvdGreaterThan100KCnt>
      <FormerOfcrEmployeesListedInd>0</FormerOfcrEmployeesListedInd>
      <TotalCompGreaterThan150KInd>1</TotalCompGreaterThan150KInd>
      <CompensationFromOtherSrcsInd>0</CompensationFromOtherSrcsInd>
      <ContractorCompensationGrp>
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          </BusinessName>
        </ContractorName>
        <ContractorAddress>
          <USAddress>
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            <CityNm>Chicago</CityNm>
            <StateAbbreviationCd>IL</StateAbbreviationCd>
            <ZIPCd>60677</ZIPCd>
          </USAddress>
        </ContractorAddress>
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        <CompensationAmt>2304566</CompensationAmt>
      </ContractorCompensationGrp>
      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
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          </BusinessName>
        </ContractorName>
        <ContractorAddress>
          <USAddress>
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            <CityNm>Newaygo</CityNm>
            <StateAbbreviationCd>MI</StateAbbreviationCd>
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          </USAddress>
        </ContractorAddress>
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      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
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          </BusinessName>
        </ContractorName>
        <ContractorAddress>
          <USAddress>
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            <StateAbbreviationCd>MI</StateAbbreviationCd>
            <ZIPCd>49684</ZIPCd>
          </USAddress>
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      </ContractorCompensationGrp>
      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
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          </BusinessName>
        </ContractorName>
        <ContractorAddress>
          <USAddress>
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      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
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        <ContractorAddress>
          <USAddress>
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      <CntrctRcvdGreaterThan100KCnt>5</CntrctRcvdGreaterThan100KCnt>
      <ProgramServiceRevenueGrp>
        <Desc>Electric Sales</Desc>
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        <RelatedOrExemptFuncIncomeAmt>253636156</RelatedOrExemptFuncIncomeAmt>
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      <ProgramServiceRevenueGrp>
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        <RelatedOrExemptFuncIncomeAmt>11194791</RelatedOrExemptFuncIncomeAmt>
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      <ProgramServiceRevenueGrp>
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      <NetRentalIncomeOrLossGrp>
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      <NetGainOrLossInvestmentsGrp>
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        <ExclusionAmt>-49684</ExclusionAmt>
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        <ExclusionAmt>894183</ExclusionAmt>
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      <InfoInScheduleOPartIXInd>X</InfoInScheduleOPartIXInd>
      <BenefitsToMembersGrp>
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      </BenefitsToMembersGrp>
      <CompCurrentOfcrDirectorsGrp>
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      </CompCurrentOfcrDirectorsGrp>
      <OtherSalariesAndWagesGrp>
        <TotalAmt>34862714</TotalAmt>
      </OtherSalariesAndWagesGrp>
      <PensionPlanContributionsGrp>
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      <PayrollTaxesGrp>
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      <InterestGrp>
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      <DepreciationDepletionGrp>
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      <OtherExpensesGrp>
        <Desc>Cost of Power</Desc>
        <TotalAmt>137651688</TotalAmt>
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      <OtherExpensesGrp>
        <Desc>UBI Taxes</Desc>
        <TotalAmt>5497</TotalAmt>
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      <OtherExpensesGrp>
        <Desc>Distribution Expenses</Desc>
        <TotalAmt>47541369</TotalAmt>
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      <OtherExpensesGrp>
        <Desc>Administrative &amp; Genera</Desc>
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      <AllOtherExpensesGrp>
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        <EOYAmt>2516824</EOYAmt>
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        <EOYAmt>6619429</EOYAmt>
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      <TotalAssetsGrp>
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      <TotalLiabilitiesGrp>
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        <EOYAmt>759492086</EOYAmt>
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        <EOYAmt>0</EOYAmt>
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      <RtnEarnEndowmentIncmOthFndsGrp>
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        <EOYAmt>281010969</EOYAmt>
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      <TotalNetAssetsFundBalanceGrp>
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      <TotLiabNetAssetsFundBalanceGrp>
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        <EOYAmt>1040503055</EOYAmt>
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      <MethodOfAccountingAccrualInd>X</MethodOfAccountingAccrualInd>
      <AccountantCompileOrReviewInd>0</AccountantCompileOrReviewInd>
      <FSAuditedInd>1</FSAuditedInd>
      <FSAuditedBasisGrp>
        <ConsolidatedBasisFinclStmtInd>X</ConsolidatedBasisFinclStmtInd>
      </FSAuditedBasisGrp>
      <AuditCommitteeInd>1</AuditCommitteeInd>
      <FederalGrantAuditRequiredInd>0</FederalGrantAuditRequiredInd>
    </IRS990>
    <IRS990ScheduleD documentId="RetDoc1040000001">
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        <BookValueAmt>5859115</BookValueAmt>
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      <BuildingsGrp>
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        <DepreciationAmt>8909288</DepreciationAmt>
        <BookValueAmt>31548649</BookValueAmt>
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      <EquipmentGrp>
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        <DepreciationAmt>219088637</DepreciationAmt>
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      <OtherLandBuildingsGrp>
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        <BookValueAmt>47527376</BookValueAmt>
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        <BookValueAmt>-13714016</BookValueAmt>
        <MethodValuationCd>C</MethodValuationCd>
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      <InvstProgramRelatedOrgGrp>
        <Desc>Due from Subsidiary</Desc>
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        <MethodValuationCd>C</MethodValuationCd>
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      <InvstProgramRelatedOrgGrp>
        <Desc>Patronage Capital from Assoc Orgs</Desc>
        <BookValueAmt>137673548</BookValueAmt>
        <MethodValuationCd>C</MethodValuationCd>
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      <InvstProgramRelatedOrgGrp>
        <Desc>Investments in Other Related Organizations</Desc>
        <BookValueAmt>5725</BookValueAmt>
        <MethodValuationCd>C</MethodValuationCd>
      </InvstProgramRelatedOrgGrp>
      <InvstProgramRelatedOrgGrp>
        <Desc>Coop Finance Corp Member Certificates</Desc>
        <BookValueAmt>4511478</BookValueAmt>
        <MethodValuationCd>C</MethodValuationCd>
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        <Desc>Customer Deposits</Desc>
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        <Desc>Finance Lease Liability</Desc>
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        <Desc>Obligation under interest rate swap</Desc>
        <Amt>-1331126</Amt>
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      <OtherLiabilitiesOrgGrp>
        <Desc>Postretirement Benefit Obligation</Desc>
        <Amt>-3479049</Amt>
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      <FootnoteTextInd>X</FootnoteTextInd>
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      <RevenueNotReportedAmt>-3296793</RevenueNotReportedAmt>
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      <RevenueNotReportedFinclStmtAmt>12501035</RevenueNotReportedFinclStmtAmt>
      <TotalRevenuePerForm990Amt>278373109</TotalRevenuePerForm990Amt>
      <TotExpnsEtcAuditedFinclStmtAmt>244124883</TotExpnsEtcAuditedFinclStmtAmt>
      <OtherExpensesIncludedAmt>-12501035</OtherExpensesIncludedAmt>
      <ExpensesNotReportedAmt>-12501035</ExpensesNotReportedAmt>
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      <ExpensesNotRptFinclStmtAmt>18450398</ExpensesNotRptFinclStmtAmt>
      <TotalExpensesPerForm990Amt>275076316</TotalExpensesPerForm990Amt>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part X, Line 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>The Company evaluates its tax positions that have been taken or are expected to be taken on income tax returns to determine if an accrual is necessary for uncertain tax positions. As of December 31, 2024 and 2023, the accrual was $0. The Company will recognize future accrued interest and penalties related to unrecognized tax benefits in income tax expense if incurred.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part XI, Line 2d - Other Adjustments:</FormAndLineReferenceDesc>
        <ExplanationTxt>Change in Equity of Subsidiary -3,296,793.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part XI, Line 4b - Other Adjustments:</FormAndLineReferenceDesc>
        <ExplanationTxt>Fiber Infrastructure Revenue Reported in Expense on Audit 10,880,961. Interest Income Reported in Expense on Audit 1,625,269. Rental Revenue Reported in Expense on Audit 73,551. Allocated Rental Expenses to UBIT activities -78,746.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part XII, Line 2d - Other Adjustments:</FormAndLineReferenceDesc>
        <ExplanationTxt>Fiber Infrastructure Revenue Reported in Revenue on 990 -10,880,961. Interest Income Reported in Revenue on 990 -1,625,269. Rental Revenue Reported in Revenue on 990 -73,551. Allocated Rental Expenses to UBIT activities 78,746.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part XII, Line 4b - Other Adjustments:</FormAndLineReferenceDesc>
        <ExplanationTxt>Patronage Allocations in 2024 for Members in 2025 18,450,398.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleD>
    <IRS990ScheduleJ documentId="RetDoc1042400001">
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      <BoardOrCommitteeApprovalInd>X</BoardOrCommitteeApprovalInd>
      <SeverancePaymentInd>0</SeverancePaymentInd>
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        <PersonNm>Shaun Lamp</PersonNm>
        <TitleTxt>President &amp; CEO</TitleTxt>
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        <OtherCompensationFilingOrgAmt>1520</OtherCompensationFilingOrgAmt>
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        <DeferredCompensationFlngOrgAmt>124499</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>41319</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>751086</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>Jennifer Wilson</PersonNm>
        <TitleTxt>Chief Impact Officer</TitleTxt>
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        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>42712</BonusFilingOrganizationAmount>
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        <OtherCompensationFilingOrgAmt>2689</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>140389</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>38296</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>509826</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>Shari Culver</PersonNm>
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        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
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        <OtherCompensationFilingOrgAmt>2663</OtherCompensationFilingOrgAmt>
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        <DeferredCompensationFlngOrgAmt>119030</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
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        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>495786</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>Daryl Desloover</PersonNm>
        <TitleTxt>VP of Information Technology</TitleTxt>
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        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
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      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>John Fettig</PersonNm>
        <TitleTxt>Chief Financial Officer (End Apr)</TitleTxt>
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      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>Denne' Smith</PersonNm>
        <TitleTxt>Chief Financial Officer (Beg Apr)</TitleTxt>
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      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>Kevin Forbes</PersonNm>
        <TitleTxt>Director of Operations</TitleTxt>
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        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
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      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>Ashley Smith</PersonNm>
        <TitleTxt>VP of Engineering</TitleTxt>
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        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
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      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>Thomas McLouth</PersonNm>
        <TitleTxt>Lineworker</TitleTxt>
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      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>Nicholas Ochampaugh</PersonNm>
        <TitleTxt>Lineworker</TitleTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Schedule J, Part II, Column C, Deferred Compensation:</FormAndLineReferenceDesc>
        <ExplanationTxt>Included in other compensation is the estimated current year increase in the actuarial value of the defined benefit plan. These amounts do not represent any current year contributions to the plan. They are estimates of the increase in the actuarial value of the plans received from the NRECA. The current year expense and the increase in actuarial value for each employee are reflected in the Schedule O statement for Form 990, Part VII, Column f.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleJ>
    <IRS990ScheduleO documentId="RetDoc1044400001">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section A, line 6</FormAndLineReferenceDesc>
        <ExplanationTxt>Great Lakes Energy is a Cooperative with all electric customers of the Cooperative required to be members.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section A, line 7a</FormAndLineReferenceDesc>
        <ExplanationTxt>Great Lakes Energy Cooperative is an electric cooperative utility. All members/consumers vote for candidates to fill the nine member Great Lakes Energy Board. An election is held annually. Board Directors serve three year terms and must be re-elected to serve longer than three years. Great Lakes Energy has nine districts with one Board Member from each district.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section A, line 7b</FormAndLineReferenceDesc>
        <ExplanationTxt>Certain bylaw changes must be ratified by the general membership. This ratification is voted upon in conjunction with the annual Board election.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, line 11b</FormAndLineReferenceDesc>
        <ExplanationTxt>The Great Lakes Energy Cooperative Board of Directors were provided with a questionnaire in June 2025 which was used to assist Management in completing pertinent sections of this 990. At a subsequent Board meeting, prior to filing, the Board reviewed the preliminary 990 and discussed specifices of the 990 return.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, line 12c</FormAndLineReferenceDesc>
        <ExplanationTxt>A questionnaire was delivered to each Board Member and Officers asking each to verify that they had received and read the policy and to certify they had no conflicts of interest. These certificates are on file with the supporting documentation for this 990. If there are any potential conflicts the CFO reviews if a conflict exists. During the discussion of a potential conflict, the individual with the potential conflict abstains from the discussion and voting on the potential confict.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, line 15a</FormAndLineReferenceDesc>
        <ExplanationTxt>Great Lakes Energy Cooperative contracts with a nationally recognized compensation consultant to determine salary levels for the Chief Executive Officer and Chief Financial Officer along with certain others in the Company. The consultant performs an annual market survey and position evaluation utilizing comparative financial data for the industry and company size. The results are confidentially disclosed to the Chairman of the Board of Directors and the Board sets the salary level for the CEO each year. The CEO, using the afore mentioned consultant, sets the salary level for the CFO each year.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section C, line 19</FormAndLineReferenceDesc>
        <ExplanationTxt>Great Lakes Energy Cooperative makes company bylaws available to the public on line at www.gtlakes.com and with printed copies upon request. Audited financial statement summaries are mailed to members in Country Lines Magazine. They are also available upon request. Great Lakes Energy Cooperative does not make the conflict of interest policy available to the public.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VII, Column F:</FormAndLineReferenceDesc>
        <ExplanationTxt>Included in Part VII, column F, other compensation is the current year estimated increase in the actuarial value of the defined benefit plans received from the NRECA. These amounts do not represent any current year contributions expense to the plan by the Cooperative. Part IX, line 5 captures only the current year expense of the defined benefit plan of the Cooperative. Therefore, the compensation in Part IX, line 5 is less than that reported in Part VII.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part VII, Section A, line 1</FormAndLineReferenceDesc>
        <ExplanationTxt>The Cooperative is reimbursed for the hours provided by the officers and board members that serve on the related organization, Great Lakes Energy Connections, Inc.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part IX, Line 4, Benefits Paid to or for Members:</FormAndLineReferenceDesc>
        <ExplanationTxt>The Cooperative has interpreted the instructions to Part IX, Line 4, to mean patronage capital allocated for the year, rather than patronage capital retired. This is consistent with the By-laws of the Cooperative.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part IX, Functional Expense, Line 24e</FormAndLineReferenceDesc>
        <ExplanationTxt>Other Expenses: The salaries, pension, and payroll taxes reported on lines 5-10 are already included in distribution expense, administrative &amp; general expense and customer expense. Therefore, these amounts are being subtracted out as an other deduction on line 24e in the amount of $(46,217,364).</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part XI, line 9:</FormAndLineReferenceDesc>
        <ExplanationTxt>Allocation of 2024 margins to members in 2025 18,450,398. Unrealized Gain/(Loss) on Interest Rate Swap -431,333. Sales Tax Refund 360,621. Undeliverable Retired Patronage 863,027. Non-cash Patronage Refunds -258,463. Changes in Equity of Subsidiary -3,296,793.</ExplanationTxt>
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    </IRS990ScheduleO>
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