Liabilities / Assets
20th percentile
Higher debt load relative to assets than 20% of similar nonprofits.
EIN 04-6819503 • 501(c)3 • Groton, MA
Profile
Suppport of the groton public library
Precomputed percentiles relative to similar nonprofits. These scores are descriptive rather than judgmental.
Liabilities / Assets
20th percentile
Higher debt load relative to assets than 20% of similar nonprofits.
Liabilities / Revenue
27th percentile
Higher debt load relative to revenue than 27% of similar nonprofits.
Net Margin
68th percentile
Higher net margin than 68% of similar nonprofits.
Top Officer Pay
40th percentile
Higher top officer pay than 40% of similar nonprofits.
Top officer pay equals 0.0% of source-year revenue.
Asset Growth
68th percentile
Faster asset growth than 68% of similar nonprofits.
Revenue Growth
23rd percentile
Faster revenue growth than 23% of similar nonprofits.
Assets
Up$4,649,449
Up $457,030 (+11%) from 2024
Liabilities
Down$1,108
Down $1,352 (-55%) from 2024
Net Assets
Up$4,648,341
Up $458,382 (+11%) from 2024
Revenue
Down$178,598
Down $21,122 (-11%) from 2024
Expenses
Down$150,667
Down $22,663 (-13%) from 2024
Net Income
Up$27,931
Up $1,541 (+5.8%) from 2024
Most recent year
2025 • Form 990Facts available. Structured filing facts are available, but richer extracted sections are limited.
Suppport of the groton public library
Groton public library endowment trust provides support for the groton public library which is controlled by the town of groton massachusetts.
| Line | Beginning | End | Change |
|---|---|---|---|
| Assets | |||
| Investments in Publicly Traded Securities | $4,156,195 | $4,612,638 | ▲ $456,443 |
| Cash and Non-Interest-Bearing Accounts | $36,224 | $36,811 | ▲ $587 |
| Total Assets | $4,192,419 | $4,649,449 | ▲ $457,030 |
| Liabilities | |||
| Accounts Payable and Accrued Expenses | $2,460 | $1,108 | ▼ $1,352 |
| Total Liabilities | $2,460 | $1,108 | ▼ $1,352 |
| Net Assets / Fund Balance | |||
| Net Assets Without Donor Restrictions | $4,189,959 | $4,648,341 | ▲ $458,382 |
| Total Net Assets Fund Balance | $4,189,959 | $4,648,341 | ▲ $458,382 |
| Total Liabilities and Net Assets / Fund Balance | $4,192,419 | $4,649,449 | ▲ $457,030 |
| Period | Beginning | Contrib. | Gain/Loss | Other Uses | End |
|---|---|---|---|---|---|
| 2024 | $4,189,959 | $32,606 | ▲ $576,443 | $134,205 | $4,648,341 |
| 2023 | $3,716,169 | $21,195 | ▲ $625,925 | $159,335 | $4,189,959 |
| 2022 | $3,351,731 | $23,139 | ▲ $461,310 | $106,066 | $3,716,169 |
| 2021 | $3,983,886 | $22,876 | ▼ $541,368 | $102,216 | $3,351,731 |
| 2020 | $3,040,506 | $16,740 | ▲ $1,015,972 | $78,762 | $3,983,886 |
| Name | Title |
|---|---|
| Michael Woods | Chair |
| David Zeiler | Director |
| Sam Morrow | Director |
| Vanessa Abraham | Director |
| John Konetzny | Treasurer |
| Line Item | Amount |
|---|---|
| Other Expenses | $150,667 |
| Total Fundraising Expense | $5,304 |
| Grants and Similar Amounts Paid | $0 |
| Professional Fundraising Fees | $0 |
| Salaries, Compensation, and Employee Benefits | $0 |
| Line Item | Program | Management | Fundraising | Total |
|---|---|---|---|---|
| Advertising | $16,695 | - | - | $16,695 |
| Fees for Services Accounting | - | $8,433 | - | $8,433 |
| All Other Expenses | $4,381 | $2,725 | - | $7,106 |
| Other Expenses | $8,878 | - | $5,304 | $5,304 |
| Office Expenses | $5,056 | - | - | $5,056 |
| Total Functional Expenses | $134,205 | $11,158 | $5,304 | $150,667 |
| Line Item | Amount |
|---|---|
| Professional Fundraising Fees | $0 |
“Distributed and reviewed by trustees prior to filing.”
“Policy review at trustee meeting.”
“UPON REQUEST”
“UPON REQUEST.”
“No changes from prior year.”
This appendix keeps the raw XML leaves available for debugging and edge-case review. The human report above is the primary experience.
| Path | # | Value |
|---|---|---|
| IRS990/AccountantCompileOrReviewInd | 0 | 1 |
| IRS990/AccountsPayableAccrExpnssGrp/BOYAmt | 0 | 2460 |
| IRS990/AccountsPayableAccrExpnssGrp/EOYAmt | 0 | 1108 |
| IRS990/AcctCompileOrReviewBasisGrp/SeparateBasisFinclStmtInd | 0 | X |
| IRS990/ActivitiesConductedPrtshpInd | 0 | 0 |
| IRS990/ActivityOrMissionDesc | 0 | GROTON PUBLIC LIBRARY ENDOWMENT TRUST PROVIDES SUPPORT FOR THE GROTON PUBLIC LIBRARY WHICH IS CONTROLLED BY THE TOWN OF GROTON MASSACHUSETTS. |
| IRS990/AdvertisingGrp/ProgramServicesAmt | 0 | 16695 |
| IRS990/AdvertisingGrp/TotalAmt | 0 | 16695 |
| IRS990/AllOtherContributionsAmt | 0 | 32606 |
| IRS990/AllOtherExpensesGrp/ManagementAndGeneralAmt | 0 | 2725 |
| IRS990/AllOtherExpensesGrp/ProgramServicesAmt | 0 | 4381 |
| IRS990/AllOtherExpensesGrp/TotalAmt | 0 | 7106 |
| IRS990/AnnualDisclosureCoveredPrsnInd | 0 | 1 |
| IRS990/AuditCommitteeInd | 0 | 1 |
| IRS990/BackupWthldComplianceInd | 0 | 1 |
| IRS990/BooksInCareOfDetail/BusinessName/BusinessNameLine1Txt | 0 | THE ORGANIZATION |
| IRS990/BooksInCareOfDetail/PhoneNum | 0 | 9784482652 |
| IRS990/BooksInCareOfDetail/USAddress/AddressLine1Txt | 0 | PO BOX 401 |
| IRS990/BooksInCareOfDetail/USAddress/CityNm | 0 | GROTON |
| IRS990/BooksInCareOfDetail/USAddress/StateAbbreviationCd | 0 | MA |
| IRS990/BooksInCareOfDetail/USAddress/ZIPCd | 0 | 014500401 |
| IRS990/BusinessRlnWith35CtrlEntInd | 0 | 0 |
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| IRS990/CashNonInterestBearingGrp/BOYAmt | 0 | 36224 |
| IRS990/CashNonInterestBearingGrp/EOYAmt | 0 | 36811 |
| IRS990/ChangeToOrgDocumentsInd | 0 | 0 |
| IRS990/CntrctRcvdGreaterThan100KCnt | 0 | 0 |
| IRS990/CollectionsOfArtInd | 0 | 0 |
| IRS990/CompensationFromOtherSrcsInd | 0 | 0 |
| IRS990/CompensationProcessCEOInd | 0 | 0 |
| IRS990/CompensationProcessOtherInd | 0 | 0 |
| IRS990/ConflictOfInterestPolicyInd | 0 | 1 |
| IRS990/ConservationEasementsInd | 0 | 0 |
| IRS990/ConsolidatedAuditFinclStmtInd | 0 | 0 |
| IRS990/CreditCounselingInd | 0 | 0 |
| IRS990/CYBenefitsPaidToMembersAmt | 0 | 0 |
| IRS990/CYContributionsGrantsAmt | 0 | 32606 |
| IRS990/CYGrantsAndSimilarPaidAmt | 0 | 0 |
| IRS990/CYInvestmentIncomeAmt | 0 | 145992 |
| IRS990/CYOtherExpensesAmt | 0 | 150667 |
| IRS990/CYOtherRevenueAmt | 0 | 0 |
| IRS990/CYProgramServiceRevenueAmt | 0 | 0 |
| IRS990/CYRevenuesLessExpensesAmt | 0 | 27931 |
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| IRS990/CYTotalExpensesAmt | 0 | 150667 |
| IRS990/CYTotalFundraisingExpenseAmt | 0 | 5304 |
| IRS990/CYTotalProfFndrsngExpnsAmt | 0 | 0 |
| IRS990/CYTotalRevenueAmt | 0 | 178598 |
| IRS990/DecisionsSubjectToApprovaInd | 0 | 0 |
| IRS990/DeductibleArtContributionInd | 0 | 0 |
| IRS990/DeductibleNonCashContriInd | 0 | 0 |
| IRS990/DelegationOfMgmtDutiesInd | 0 | 0 |
| IRS990/Desc | 0 | TO PROVIDE FINANCIAL SUPPORT FOR PROGRAMS WHICH BENEFIT THE GROTON PUBLIC LIBRARY |
| IRS990/DescribedInSection501c3Ind | 0 | 1 |
| IRS990/DisregardedEntityInd | 0 | 0 |
| IRS990/DocumentRetentionPolicyInd | 0 | 1 |
| IRS990/DonorAdvisedFundInd | 0 | 0 |
| IRS990/DonorRstrOrQuasiEndowmentsInd | 0 | 0 |
| IRS990/ElectionOfBoardMembersInd | 0 | 0 |
| IRS990/EmployeeCnt | 0 | 0 |
| IRS990/EngagedInExcessBenefitTransInd | 0 | 0 |
| IRS990/ExpenseAmt | 0 | 134205 |
| IRS990/FamilyOrBusinessRlnInd | 0 | 0 |
| IRS990/FederalGrantAuditRequiredInd | 0 | 0 |
| IRS990/FeesForServicesAccountingGrp/ManagementAndGeneralAmt | 0 | 8433 |
| IRS990/FeesForServicesAccountingGrp/TotalAmt | 0 | 8433 |
| IRS990/ForeignActivitiesInd | 0 | 0 |
| IRS990/ForeignFinancialAccountInd | 0 | 0 |
| IRS990/ForeignOfficeInd | 0 | 0 |
| IRS990/Form8282PropertyDisposedOfInd | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 0 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 1 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 2 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 3 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 4 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 0 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 1 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 2 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 3 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 4 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 0 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 1 | X |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 1 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 2 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 3 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 4 | 0 |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 0 | DAVID ZEILER |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 1 | JOHN KONETZNY |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 2 | SAM MORROW |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 3 | MICHAEL WOODS |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 4 | VANESSA ABRAHAM |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 1 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 2 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 3 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 4 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 1 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 2 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 3 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 4 | 0 |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 0 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 1 | TREASURER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 2 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 3 | CHAIR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 4 | DIRECTOR |
| IRS990/Form990ProvidedToGvrnBodyInd | 0 | 1 |
| IRS990/FormationYr | 0 | 1996 |
| IRS990/FormerOfcrEmployeesListedInd | 0 | 0 |
| IRS990/FSAuditedInd | 0 | 0 |
| IRS990/FundraisingActivitiesInd | 0 | 0 |
| IRS990/GainOrLossGrp/SecuritiesAmt | 0 | 53711 |
| IRS990/GamingActivitiesInd | 0 | 0 |
| IRS990/GoverningBodyVotingMembersCnt | 0 | 5 |
| IRS990/GrantsToIndividualsInd | 0 | 0 |
| IRS990/GrantsToOrganizationsInd | 0 | 0 |
| IRS990/GrantToRelatedPersonInd | 0 | 0 |
| IRS990/GrossAmountSalesAssetsGrp/SecuritiesAmt | 0 | 130127 |
| IRS990/GrossReceiptsAmt | 0 | 255014 |
| IRS990/GroupReturnForAffiliatesInd | 0 | 0 |
| IRS990/IncludeFIN48FootnoteInd | 0 | 0 |
| IRS990/IncmFromInvestBondProceedsGrp/ExclusionAmt | 0 | 92281 |
| IRS990/IncmFromInvestBondProceedsGrp/TotalRevenueColumnAmt | 0 | 92281 |
| IRS990/IndependentAuditFinclStmtInd | 0 | 0 |
| IRS990/IndependentVotingMemberCnt | 0 | 5 |
| IRS990/IndivRcvdGreaterThan100KCnt | 0 | 0 |
| IRS990/IndoorTanningServicesInd | 0 | 0 |
| IRS990/InfoInScheduleOPartVIInd | 0 | X |
| IRS990/InfoInScheduleOPartXIIInd | 0 | X |
| IRS990/InvestmentInJointVentureInd | 0 | 0 |
| IRS990/InvestmentsPubTradedSecGrp/BOYAmt | 0 | 4156195 |
| IRS990/InvestmentsPubTradedSecGrp/EOYAmt | 0 | 4612638 |
| IRS990/IRPDocumentCnt | 0 | 28 |
| IRS990/IRPDocumentW2GCnt | 0 | 0 |
| IRS990/LegalDomicileStateCd | 0 | MA |
| IRS990/LessCostOthBasisSalesExpnssGrp/SecuritiesAmt | 0 | 76416 |
| IRS990/LoanOutstandingInd | 0 | 0 |
| IRS990/LobbyingActivitiesInd | 0 | 0 |
| IRS990/LocalChaptersInd | 0 | 0 |
| IRS990/MaterialDiversionOrMisuseInd | 0 | 0 |
| IRS990/MembersOrStockholdersInd | 0 | 0 |
| IRS990/MethodOfAccountingCashInd | 0 | X |
| IRS990/MinutesOfCommitteesInd | 0 | 1 |
| IRS990/MinutesOfGoverningBodyInd | 0 | 1 |
| IRS990/MissionDesc | 0 | SUPPORT OF THE GROTON PUBLIC LIBRARY |
| IRS990/MoreThan5000KToIndividualsInd | 0 | 0 |
| IRS990/MoreThan5000KToOrgInd | 0 | 0 |
| IRS990/NetAssetsOrFundBalancesBOYAmt | 0 | 4189959 |
| IRS990/NetAssetsOrFundBalancesEOYAmt | 0 | 4648341 |
| IRS990/NetGainOrLossInvestmentsGrp/ExclusionAmt | 0 | 53711 |
| IRS990/NetGainOrLossInvestmentsGrp/TotalRevenueColumnAmt | 0 | 53711 |
| IRS990/NetUnrelatedBusTxblIncmAmt | 0 | 0 |
| IRS990/NetUnrlzdGainsLossesInvstAmt | 0 | 430451 |
| IRS990/NoDonorRestrictionNetAssetsGrp/BOYAmt | 0 | 4189959 |
| IRS990/NoDonorRestrictionNetAssetsGrp/EOYAmt | 0 | 4648341 |
| IRS990/NoListedPersonsCompensatedInd | 0 | X |
| IRS990/NondeductibleContributionsInd | 0 | 0 |
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| IRS990/OfficeExpensesGrp/TotalAmt | 0 | 5056 |
| IRS990/OfficerMailingAddressInd | 0 | 0 |
| IRS990/OperateHospitalInd | 0 | 0 |
| IRS990/Organization501c3Ind | 0 | X |
| IRS990/OrganizationFollowsFASB117Ind | 0 | X |
| IRS990/OtherChangesInNetAssetsAmt | 0 | 0 |
| IRS990/OtherExpensesGrp/Desc | 0 | LIBRARY PROGRAMS |
| IRS990/OtherExpensesGrp/Desc | 1 | SUPPLIES |
| IRS990/OtherExpensesGrp/Desc | 2 | EQUIPMENT AND TECHNOLOG |
| IRS990/OtherExpensesGrp/Desc | 3 | FUNDRAISING |
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| IRS990/OtherExpensesGrp/ProgramServicesAmt | 0 | 87657 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 1 | 11538 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 2 | 8878 |
| IRS990/OtherExpensesGrp/TotalAmt | 0 | 87657 |
| IRS990/OtherExpensesGrp/TotalAmt | 1 | 11538 |
| IRS990/OtherExpensesGrp/TotalAmt | 2 | 8878 |
| IRS990/OtherExpensesGrp/TotalAmt | 3 | 5304 |
| IRS990/PartialLiquidationInd | 0 | 0 |
| IRS990/PoliticalCampaignActyInd | 0 | 0 |
| IRS990/PrincipalOfficerNm | 0 | VANESSA ABRAHAM |
| IRS990/ProfessionalFundraisingInd | 0 | 0 |
| IRS990/ProhibitedTaxShelterTransInd | 0 | 0 |
| IRS990/PYBenefitsPaidToMembersAmt | 0 | 0 |
| IRS990/PYContributionsGrantsAmt | 0 | 21195 |
| IRS990/PYExcessBenefitTransInd | 0 | 0 |
| IRS990/PYGrantsAndSimilarPaidAmt | 0 | 0 |
| IRS990/PYInvestmentIncomeAmt | 0 | 178525 |
| IRS990/PYOtherExpensesAmt | 0 | 173330 |
| IRS990/PYOtherRevenueAmt | 0 | 0 |
| IRS990/PYProgramServiceRevenueAmt | 0 | 0 |
| IRS990/PYRevenuesLessExpensesAmt | 0 | 26390 |
| IRS990/PYSalariesCompEmpBnftPaidAmt | 0 | 0 |
| IRS990/PYTotalExpensesAmt | 0 | 173330 |
| IRS990/PYTotalProfFndrsngExpnsAmt | 0 | 0 |
| IRS990/PYTotalRevenueAmt | 0 | 199720 |
| IRS990/QuidProQuoContributionsInd | 0 | 0 |
| IRS990/ReconcilationRevenueExpnssAmt | 0 | 27931 |
| IRS990/RegularMonitoringEnfrcInd | 0 | 1 |
| IRS990/RelatedEntityInd | 0 | 0 |
| IRS990/RelatedOrganizationCtrlEntInd | 0 | 0 |
| IRS990/ReportInvestmentsOtherSecInd | 0 | 0 |
| IRS990/ReportLandBuildingEquipmentInd | 0 | 0 |
| IRS990/ReportOtherAssetsInd | 0 | 0 |
| IRS990/ReportOtherLiabilitiesInd | 0 | 0 |
| IRS990/ReportProgramRelatedInvstInd | 0 | 0 |
| IRS990ScheduleA/FactsAndCircumstancesTestTxt | 0 | THE GROTON PUBLIC LIBRARY ENDOWMENT WAS FOUNDED IN 1996 TO ASSIST IN MAINTAINING THE QUALITY AND EXCELLENCE OF THE GROTON PUBLIC LIBRARY IN GROTON, MA. THE ENDOWMENT WAS FUNDED WITH MONEY FROM MANY INDIVIDUALS IN GROTON, MA AND INVESTED AS A PERMANENT ENDOWMENT, WITH A PERCENTAGE OF THE NET ASSETS USED TO FUND LIBRARY EXPENDITURES THROUGH A GRANT PROCESS. EACH YEAR, THE GROTON PUBLIC LIBRARY ENDOWMENT TRUST SENDS OUT A NEWSLETTER MAILED TO ALL HOUSEHOLDS IN GROTON DETAILING THE PROGRAMS THAT WERE SUPPORTED DURING THE PAST YEAR BY THE ENDOWMENT, AND SOLICITING FUNDS FOR THE ENDOWMENT. IN ADDITION, A MENTION IS MADE AT THE BEGINNING AND END OF ALL LIBRARY PROGRAMS FUNDED BY THE ENDOWMENT THAT THE ENDOWMENT HAS FUNDED THE PROGRAM, WITH A REQUEST FOR SUPPORT FOR THE ENDOWMENT. OCCASIONALLY EVENTS ARE HELD TO HONOR DONORS TO THE ENDOWMENT. ALL PROCEEDS OF THE ENDOWMENT ARE SPENT ON LIBRARY PROGRAMS AND RELATED COSTS. THE ENDOWMENT TRUST IS GOVERNED BY A BOARD OF TRUSTEES MADE UP OF THE GROTON PUBLIC LIBRARY DIRECTOR, A GROTON PUBLIC LIBRARY TRUSTEE, TWO MEMBERS APPOINTED BY THE GROTON PUBLIC LIBRARY TRUSTEES, AND ONE MEMBER APPOINTED BY THE GROTON TOWN MODERATOR, TO ENSURE THAT THE ENDOWMENT OPERATES FOR THE PUBLIC BENEFIT OF THE CITIZENS OF GROTON, MA. |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearAmt | 0 | 32606 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus1YearAmt | 0 | 21195 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus2YearsAmt | 0 | 23138 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus3YearsAmt | 0 | 26253 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus4YearsAmt | 0 | 16740 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/TotalAmt | 0 | 119932 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearAmt | 0 | 92281 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearMinus1YearAmt | 0 | 78787 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearMinus2YearsAmt | 0 | 69674 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearMinus3YearsAmt | 0 | 66936 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearMinus4YearsAmt | 0 | 54678 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/TotalAmt | 0 | 362356 |
| IRS990ScheduleA/PrivateFoundation170Ind | 0 | X |
| IRS990ScheduleA/PublicOrganization170Ind | 0 | X |
| IRS990ScheduleA/PublicSupportCY170Pct | 0 | 0.24870 |
| IRS990ScheduleA/PublicSupportPY170Pct | 0 | 0.23870 |
| IRS990ScheduleA/PublicSupportTotal170Amt | 0 | 119932 |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearAmt | 0 | 32606 |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus1YearAmt | 0 | 21195 |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus2YearsAmt | 0 | 23138 |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus3YearsAmt | 0 | 26253 |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus4YearsAmt | 0 | 16740 |
| IRS990ScheduleA/TotalCalendarYear170Grp/TotalAmt | 0 | 119932 |
| IRS990ScheduleA/TotalSupportAmt | 0 | 482288 |
| IRS990/ScheduleBRequiredInd | 0 | 0 |
| IRS990ScheduleD/CYEndwmtFundGrp/AdministrativeExpensesAmt | 0 | 16462 |
| IRS990ScheduleD/CYEndwmtFundGrp/BeginningYearBalanceAmt | 0 | 4189959 |
| IRS990ScheduleD/CYEndwmtFundGrp/ContributionsAmt | 0 | 32606 |
| IRS990ScheduleD/CYEndwmtFundGrp/EndYearBalanceAmt | 0 | 4648341 |
| IRS990ScheduleD/CYEndwmtFundGrp/InvestmentEarningsOrLossesAmt | 0 | 576443 |
| IRS990ScheduleD/CYEndwmtFundGrp/OtherExpendituresAmt | 0 | 134205 |
| IRS990ScheduleD/CYMinus1YrEndwmtFundGrp/AdministrativeExpensesAmt | 0 | 13995 |
| IRS990ScheduleD/CYMinus1YrEndwmtFundGrp/BeginningYearBalanceAmt | 0 | 3716169 |
| IRS990ScheduleD/CYMinus1YrEndwmtFundGrp/ContributionsAmt | 0 | 21195 |
| IRS990ScheduleD/CYMinus1YrEndwmtFundGrp/EndYearBalanceAmt | 0 | 4189959 |
| IRS990ScheduleD/CYMinus1YrEndwmtFundGrp/InvestmentEarningsOrLossesAmt | 0 | 625925 |
| IRS990ScheduleD/CYMinus1YrEndwmtFundGrp/OtherExpendituresAmt | 0 | 159335 |
| IRS990ScheduleD/CYMinus2YrEndwmtFundGrp/AdministrativeExpensesAmt | 0 | 13945 |
| IRS990ScheduleD/CYMinus2YrEndwmtFundGrp/BeginningYearBalanceAmt | 0 | 3351731 |
| IRS990ScheduleD/CYMinus2YrEndwmtFundGrp/ContributionsAmt | 0 | 23139 |
| IRS990ScheduleD/CYMinus2YrEndwmtFundGrp/EndYearBalanceAmt | 0 | 3716169 |
| IRS990ScheduleD/CYMinus2YrEndwmtFundGrp/InvestmentEarningsOrLossesAmt | 0 | 461310 |
| IRS990ScheduleD/CYMinus2YrEndwmtFundGrp/OtherExpendituresAmt | 0 | 106066 |
| IRS990ScheduleD/CYMinus3YrEndwmtFundGrp/AdministrativeExpensesAmt | 0 | 11447 |
| IRS990ScheduleD/CYMinus3YrEndwmtFundGrp/BeginningYearBalanceAmt | 0 | 3983886 |
| IRS990ScheduleD/CYMinus3YrEndwmtFundGrp/ContributionsAmt | 0 | 22876 |
| IRS990ScheduleD/CYMinus3YrEndwmtFundGrp/EndYearBalanceAmt | 0 | 3351731 |
| IRS990ScheduleD/CYMinus3YrEndwmtFundGrp/InvestmentEarningsOrLossesAmt | 0 | -541368 |
| IRS990ScheduleD/CYMinus3YrEndwmtFundGrp/OtherExpendituresAmt | 0 | 102216 |
| IRS990ScheduleD/CYMinus4YrEndwmtFundGrp/AdministrativeExpensesAmt | 0 | 10570 |
| IRS990ScheduleD/CYMinus4YrEndwmtFundGrp/BeginningYearBalanceAmt | 0 | 3040506 |
| IRS990ScheduleD/CYMinus4YrEndwmtFundGrp/ContributionsAmt | 0 | 16740 |
| IRS990ScheduleD/CYMinus4YrEndwmtFundGrp/EndYearBalanceAmt | 0 | 3983886 |
| IRS990ScheduleD/CYMinus4YrEndwmtFundGrp/InvestmentEarningsOrLossesAmt | 0 | 1015972 |
| IRS990ScheduleD/CYMinus4YrEndwmtFundGrp/OtherExpendituresAmt | 0 | 78762 |
| IRS990ScheduleD/EndowmentsHeldRelatedOrgInd | 0 | 0 |
| IRS990ScheduleD/EndowmentsHeldUnrelatedOrgInd | 0 | 0 |
| IRS990ScheduleD/TotalBookValueLandBuildingsAmt | 0 | 0 |
| IRS990/ScheduleJRequiredInd | 0 | 0 |
| IRS990/ScheduleORequiredInd | 0 | 1 |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 0 | DISTRIBUTED AND REVIEWED BY TRUSTEES PRIOR TO FILING. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 1 | POLICY REVIEW AT TRUSTEE MEETING. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 2 | UPON REQUEST |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 3 | UPON REQUEST. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 4 | NO CHANGES FROM PRIOR YEAR. |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 0 | FORM 990, PART VI, SECTION B, LINE 11B |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 1 | FORM 990, PART VI, SECTION B, LINE 12C |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 2 | FORM 990, PART VI, SECTION C, LINE 18 |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 3 | FORM 990, PART VI, SECTION C, LINE 19 |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 4 | FORM 990, PART XII, LINE 2C: |
| IRS990/SchoolOperatingInd | 0 | 0 |
| IRS990/SignificantChangeInd | 0 | 0 |
| IRS990/SignificantNewProgramSrvcInd | 0 | 0 |
| IRS990/StatesWhereCopyOfReturnIsFldCd | 0 | MA |
| IRS990/SubjectToExcsTaxNetInvstIncInd | 0 | 0 |
| IRS990/SubjectToProxyTaxInd | 0 | 0 |
| IRS990/SubjToTaxRmnrtnExPrchtPymtInd | 0 | 0 |
| IRS990/TaxablePartyNotificationInd | 0 | 0 |
| IRS990/TaxExemptBondsInd | 0 | 0 |
| IRS990/TerminateOperationsInd | 0 | 0 |
| IRS990/TotalAssetsBOYAmt | 0 | 4192419 |
| IRS990/TotalAssetsEOYAmt | 0 | 4649449 |
| IRS990/TotalAssetsGrp/BOYAmt | 0 | 4192419 |
| IRS990/TotalAssetsGrp/EOYAmt | 0 | 4649449 |
| IRS990/TotalCompGreaterThan150KInd | 0 | 0 |
| IRS990/TotalContributionsAmt | 0 | 32606 |
| IRS990/TotalEmployeeCnt | 0 | 0 |
| IRS990/TotalFunctionalExpensesGrp/FundraisingAmt | 0 | 5304 |
| IRS990/TotalFunctionalExpensesGrp/ManagementAndGeneralAmt | 0 | 11158 |
| IRS990/TotalFunctionalExpensesGrp/ProgramServicesAmt | 0 | 134205 |
| IRS990/TotalFunctionalExpensesGrp/TotalAmt | 0 | 150667 |
| IRS990/TotalGrossUBIAmt | 0 | 0 |
| IRS990/TotalLiabilitiesBOYAmt | 0 | 2460 |
| IRS990/TotalLiabilitiesEOYAmt | 0 | 1108 |
| IRS990/TotalLiabilitiesGrp/BOYAmt | 0 | 2460 |
| IRS990/TotalLiabilitiesGrp/EOYAmt | 0 | 1108 |
| IRS990/TotalNetAssetsFundBalanceGrp/BOYAmt | 0 | 4189959 |
| IRS990/TotalNetAssetsFundBalanceGrp/EOYAmt | 0 | 4648341 |
| IRS990/TotalOtherCompensationAmt | 0 | 0 |
| IRS990/TotalProgramServiceExpensesAmt | 0 | 134205 |
| IRS990/TotalReportableCompFromOrgAmt | 0 | 0 |
| IRS990/TotalRevenueGrp/ExclusionAmt | 0 | 145992 |
| IRS990/TotalRevenueGrp/RelatedOrExemptFuncIncomeAmt | 0 | 0 |
| IRS990/TotalRevenueGrp/TotalRevenueColumnAmt | 0 | 178598 |
| IRS990/TotalRevenueGrp/UnrelatedBusinessRevenueAmt | 0 | 0 |
| IRS990/TotalVolunteersCnt | 0 | 0 |
| IRS990/TotLiabNetAssetsFundBalanceGrp/BOYAmt | 0 | 4192419 |
| IRS990/TotLiabNetAssetsFundBalanceGrp/EOYAmt | 0 | 4649449 |
| IRS990/TotReportableCompRltdOrgAmt | 0 | 0 |
| IRS990/TrnsfrExmptNonChrtblRltdOrgInd | 0 | 0 |
| IRS990/TypeOfOrganizationTrustInd | 0 | X |
| IRS990/UnrelatedBusIncmOverLimitInd | 0 | 0 |
| IRS990/UponRequestInd | 0 | X |
| IRS990/USAddress/AddressLine1Txt | 0 | PO BOX 401 |
| IRS990/USAddress/CityNm | 0 | GROTON |
| IRS990/USAddress/StateAbbreviationCd | 0 | MA |
| IRS990/USAddress/ZIPCd | 0 | 014500401 |
| IRS990/VotingMembersGoverningBodyCnt | 0 | 5 |
| IRS990/VotingMembersIndependentCnt | 0 | 5 |
| IRS990/WebsiteAddressTxt | 0 | WWW.GPLENDOWMENT.ORG |
| IRS990/WhistleblowerPolicyInd | 0 | 1 |
| ReturnHeader/BuildTS | 0 | 2025-03-06 01:10:19Z |
| ReturnHeader/BusinessOfficerGrp/DiscussWithPaidPreparerInd | 0 | 1 |
| ReturnHeader/BusinessOfficerGrp/PersonNm | 0 | VANESSA ABRAHAM |
| ReturnHeader/BusinessOfficerGrp/PersonTitleTxt | 0 | LIBRARY DIRECTOR |
| ReturnHeader/BusinessOfficerGrp/PhoneNum | 0 | 6035667766 |
| ReturnHeader/BusinessOfficerGrp/SignatureDt | 0 | 2025-11-14 |
| ReturnHeader/Filer/BusinessName/BusinessNameLine1Txt | 0 | GROTON PUBLIC LIBRARY ENDOWMENT TRUST |
| ReturnHeader/Filer/BusinessNameControlTxt | 0 | GROT |
| ReturnHeader/Filer/EIN | 0 | 046819503 |
| ReturnHeader/Filer/PhoneNum | 0 | 9784482652 |
| ReturnHeader/Filer/USAddress/AddressLine1Txt | 0 | PO BOX 401 |
| ReturnHeader/Filer/USAddress/CityNm | 0 | GROTON |
| ReturnHeader/Filer/USAddress/StateAbbreviationCd | 0 | MA |
| ReturnHeader/Filer/USAddress/ZIPCd | 0 | 014500401 |
| ReturnHeader/IRSResponsiblePrtyInfoCurrInd | 0 | 1 |
| ReturnHeader/PreparerFirmGrp/PreparerFirmEIN | 0 | 825448715 |
| ReturnHeader/PreparerFirmGrp/PreparerFirmName/BusinessNameLine1Txt | 0 | SPINELLI CPA PC |
| ReturnHeader/PreparerFirmGrp/PreparerUSAddress/AddressLine1Txt | 0 | 146 WEST BOYLSTON DRIVE SUITE 302 |
| ReturnHeader/PreparerFirmGrp/PreparerUSAddress/CityNm | 0 | WORCESTER |
| ReturnHeader/PreparerFirmGrp/PreparerUSAddress/StateAbbreviationCd | 0 | MA |
| ReturnHeader/PreparerFirmGrp/PreparerUSAddress/ZIPCd | 0 | 01606 |
| ReturnHeader/PreparerPersonGrp/PhoneNum | 0 | 5083656522 |
| ReturnHeader/PreparerPersonGrp/PreparationDt | 0 | 2025-11-14 |
| ReturnHeader/PreparerPersonGrp/PreparerPersonNm | 0 | KAREN SPINELLI |
| ReturnHeader/ReturnTs | 0 | 2025-11-14T10:14:41-06:00 |
| ReturnHeader/ReturnTypeCd | 0 | 990 |
| ReturnHeader/TaxPeriodBeginDt | 0 | 2024-07-01 |
| ReturnHeader/TaxPeriodEndDt | 0 | 2025-06-30 |
| ReturnHeader/TaxYr | 0 | 2024 |
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