Civic Intelligence

The Boston Library Society

EIN 04-1105450 • 501(c)3 • Boston, MA

Profile

See schedule 0.the boston library society allocates funds to the boston athenaeum, a tax-exempt organization. The boston athenaeum is an independent library committed to maintaining and augmenting its significant collections of history, literature and art;to serving a broad community of scholars as a center for research; to serving its membership and the public not only through its circulating and reference collections but also through lectures, exhibitions and publications; and to preserving and enhancing its national historic landmark building.

Refreshing map…

10 12 Beacon StreetBoston, MA 02108

www.bostonathenaeum.org

Siviq Scores

Precomputed percentiles relative to similar nonprofits. These scores are descriptive rather than judgmental.

Liabilities / Assets

18th percentile

0.00x

Tied with the lowest-debt nonprofits in its peer group.

501(c)3 • $1M-$5M nonprofits • Source year 2024

Liabilities / Revenue

19th percentile

0.00x

Tied with the lowest-debt nonprofits in its peer group.

501(c)3 • $1M-$5M nonprofits • Source year 2024

Net Margin

8th percentile

-42%

Higher net margin than 8% of similar nonprofits.

501(c)3 • $1M-$5M nonprofits • Source year 2024

Top Officer Pay

97th percentile

$382,772

Higher top officer pay than 97% of similar nonprofits.

Top officer pay equals 994.3% of source-year revenue.

501(c)3 • $1M-$5M nonprofits • Source year 2024

Asset Growth

79th percentile

21%

Faster asset growth than 79% of similar nonprofits.

501(c)3 • $1M-$5M nonprofits • Annualized from 2023 to 2024

Revenue Growth

76th percentile

30%

Faster revenue growth than 76% of similar nonprofits.

501(c)3 • $1M-$5M nonprofits • Annualized from 2023 to 2024

Balance Sheet
Liabilities / Assets18th percentile

Assets

Up

$1,190,664

Up $203,112 (+21%) from 2023

Liabilities

Flat

$0

Flat from 2023

Net Assets

Up

$1,190,664

Up $203,112 (+21%) from 2023

Operations
Liabilities / Revenue19th percentileNet Margin8th percentile

Revenue

Up

$38,495

Up $8,868 (+30%) from 2023

Expenses

Flat

$54,759

Flat from 2023

Net Income

Up

-$16,264

Up $8,868 (+35%) from 2023

Trend Graphs

Balance Sheet Trend

Asset Growth79th percentile

Grouped bars show assets, liabilities, and net assets across loaded filings.

$1.5M$1.0M$500K$0Assets 2010: $527,059Liabilities 2010: $824Net Assets 2010: $526,2352010Assets 2011: $555,509Liabilities 2011: $878Net Assets 2011: $554,6312011Assets 2012: $654,086Liabilities 2012: $932Net Assets 2012: $653,1542012Assets 2013: $747,789Liabilities 2013: $1,083Net Assets 2013: $746,7062013Assets 2014: $826,458Liabilities 2014: $1,839Net Assets 2014: $824,6192014Assets 2015: $873,430Liabilities 2015: $1,949Net Assets 2015: $871,4812015Assets 2016: $940,124Liabilities 2016: $2,057Net Assets 2016: $938,0672016Assets 2017: $979,887Liabilities 2017: $571Net Assets 2017: $979,3162017Assets 2018: $980,759Liabilities 2018: $0Net Assets 2018: $980,7592018Assets 2019: $966,279Liabilities 2019: $0Net Assets 2019: $966,2792019Assets 2020: $1,005,187Liabilities 2020: $0Net Assets 2020: $1,005,1872020Assets 2021: $1,165,604Liabilities 2021: $0Net Assets 2021: $1,165,6042021Assets 2022: $897,842Liabilities 2022: $0Net Assets 2022: $897,8422022Assets 2023: $987,552Liabilities 2023: $0Net Assets 2023: $987,5522023Assets 2024: $1,190,664Liabilities 2024: $0Net Assets 2024: $1,190,6642024

Highlighted filing

2024

Assets$1,190,664
Liabilities$0
Net Assets$1,190,664
Open 2024 Filing

Operations Trend

Revenue Growth76th percentile

Revenue, expenses, and net income by year, with the latest filing highlighted.

$600K$400K$200K$0-$200KExpenses 2010: $31,9652010Expenses 2011: $3,3432011Expenses 2012: $30,9092012Revenue 2013: $9,855Expenses 2013: $31,638Net Income 2013: -$21,7832013Revenue 2014: $15,187Expenses 2014: $33,362Net Income 2014: -$18,1752014Revenue 2015: $14,650Expenses 2015: $39,862Net Income 2015: -$25,2122015Revenue 2016: $22,363Expenses 2016: $44,503Net Income 2016: -$22,1402016Revenue 2017: $571,860Expenses 2017: $45,423Net Income 2017: $526,4372017Revenue 2018: $20,796Expenses 2018: $45,645Net Income 2018: -$24,8492018Revenue 2019: $27,695Expenses 2019: $46,995Net Income 2019: -$19,3002019Revenue 2020: $21,619Expenses 2020: $48,725Net Income 2020: -$27,1062020Revenue 2021: $27,023Expenses 2021: $49,958Net Income 2021: -$22,9352021Revenue 2022: $33,339Expenses 2022: $51,172Net Income 2022: -$17,8332022Revenue 2023: $29,627Expenses 2023: $54,759Net Income 2023: -$25,1322023Revenue 2024: $38,495Expenses 2024: $54,759Net Income 2024: -$16,2642024

Highlighted filing

2024

Revenue$38,495
Expenses$54,759
Net Income-$16,264
Open 2024 Filing

Filings

Most recent year

2024 • Form 990Facts available. Structured filing facts are available, but richer extracted sections are limited.

Open filing
Assets
$1,190,664
Liabilities
$0
Net assets
$1,190,664
Revenue
$38,495
Expenses
$54,759
Net income
-$16,264
Balance SheetOperations
YearAssetsLiabilitiesNet AssetsRevenueExpensesNet Income
2024Facts available. Structured filing facts are available, but richer extracted sections are limited.$1.19$0.00$1.19$0.04$0.05$0.02
2023Detailed filing. Detailed filing data is available for this year.$0.99$0.00$0.99$0.03$0.05$0.03
2022Facts available. Structured filing facts are available, but richer extracted sections are limited.$0.90$0.00$0.90$0.03$0.05$0.02
2021XML pending. An XML filing is linked for this year, but detailed extraction is still pending.$1.17$0.00$1.17$0.03$0.05$0.02
2020Facts available. Structured filing facts are available, but richer extracted sections are limited.$1.01$0.00$1.01$0.02$0.05$0.03
2019XML pending. An XML filing is linked for this year, but detailed extraction is still pending.$0.97$0.00$0.97$0.03$0.05$0.02
2018XML pending. An XML filing is linked for this year, but detailed extraction is still pending.$0.98$0.00$0.98$0.02$0.05$0.02
2017Facts available. Structured filing facts are available, but richer extracted sections are limited.$0.98$0.00$0.98$0.57$0.05$0.53
2016Detailed filing. Detailed filing data is available for this year.$0.94$0.00$0.94$0.02$0.04$0.02
2015XML pending. An XML filing is linked for this year, but detailed extraction is still pending.$0.87$0.00$0.87$0.01$0.04$0.03
2014Detailed filing. Detailed filing data is available for this year.$0.83$0.00$0.82$0.02$0.03$0.02
2013Facts available. Structured filing facts are available, but richer extracted sections are limited.$0.75$0.00$0.75$0.01$0.03$0.02
2012Facts available. Structured filing facts are available, but richer extracted sections are limited.$0.65$0.00$0.65$0.03
2011Facts available. Structured filing facts are available, but richer extracted sections are limited.$0.56$0.00$0.55$0.00
2010Facts available. Structured filing facts are available, but richer extracted sections are limited.$0.53$0.00$0.53$0.03
Latest Filing Detail
Jump To
Filing Snapshot
Filing Period
Oct 1, 2023 to Sep 30, 2024
Signed
Jul 29, 2025
Return Version
2023v6.0
Gross Receipts
$213,412
Mission and Program Overview

Mission

See schedule 0.the boston library society allocates funds to the boston athenaeum, a tax-exempt organization. The boston athenaeum is an independent library committed to maintaining and augmenting its significant collections of history, literature and art;to serving a broad community of scholars as a center for research; to serving its membership and the public not only through its circulating and reference collections but also through lectures, exhibitions and publications; and to preserving and enhancing its national historic landmark building.

The boston library society allocates funds to the boston athenaeum, a tax-exempt organization.

Balance Sheet Detail
LineBeginningEndChange
Assets
Investments in Publicly Traded Securities$987,552$1,190,664▲ $203,112
Total Assets$987,552$1,190,664▲ $203,112
Liabilities
Total Liabilities$0$0→ $0
Net Assets / Fund Balance
Net Assets Without Donor Restrictions$662,992$799,901▲ $136,909
Net Assets With Donor Restrictions$324,560$390,763▲ $66,203
Total Net Assets Fund Balance$987,552$1,190,664▲ $203,112
Total Liabilities and Net Assets / Fund Balance$987,552$1,190,664▲ $203,112
Compensation and Service Providers
Top Officer Pay97th percentile

Board Members and Trustees

NameTitle
Leah RosovskyDirector
Christopher BoudrotDirector of Finance
Amy RyanTrustee
Austin V ShapardTrustee
Creelea Henderson PangaroTrustee
Earl M Collier JrTrustee
Melissa FetterTrustee
Roger HaynesTrustee
Susan WeatherbieTrustee
Timothy W DigginsTrustee
Arthur B PageSecretary
Javier CevallosTreasurer
Revenue and Support

Revenue Composition

Contributions and Grants
$0
Program Service Revenue
$0
Investment Income
$38,495
Other Revenue
$0
Change in Net Assets
$-16,264

Audited Revenue Reconciliation

Revenue per Audited Statements
$38,495
Revenue Not Reported on Financial Statements
$0
Revenue Not Reported on Form 990
$219,376
Total Revenue per Audited Statements
$257,871
Total Revenue per Form 990
$38,495
Expenses and Functional Allocation

Major Expense Lines

Line ItemAmount
Grants and Similar Amounts Paid$54,759
Other Expenses$0
Professional Fundraising Fees$0
Salaries, Compensation, and Employee Benefits$0
Total Fundraising Expense$0

Functional Expense Allocation

Line ItemProgramManagementFundraisingTotal
Grants to Domestic Orgs$54,759--$54,759
Total Functional Expenses$54,759$0$0$54,759

Audited Expense Reconciliation

Line ItemAmount
Expenses per Audited Statements$54,759
Total Expenses per Audited Statements$54,759
Total Expenses per Form 990$54,759
Expenses Not Reported on Financial Statements$0
Expenses Not Reported on Form 990$0
International Activity

Grant and Assistance Recipients

RecipientLocationCategoryPurposeAmount
Proprietors of the Boston AthenaeumBoston, MA501(c)(3)General Grant$54,759
Fundraising, Events, and Gaming
Fundraising activities
No
Gaming activities
No
Professional fundraiser used
No

Fundraising and Gaming Totals

Line ItemAmount
Professional Fundraising Fees$0
Political and Lobbying Activity
Political campaign activity
No
Lobbying activity
No
Subject to proxy tax
No
Governance and Compliance

Governance Checklist

Compiled or reviewed by an accountant
No
Annual disclosure for covered persons
Yes
Audit committee
Yes
Business relationship with 35% controlled entity
No
Business relationship with family members
No
Business relationship with organization members
No
Material changes to governing documents
No
Compensation from other sources disclosed
No
CEO compensation reviewed
Yes
Other officer compensation reviewed
Yes
Conflict-of-interest policy
Yes
Audited financial statements prepared
Yes
Key decisions subject to board approval
No
Management duties delegated
No

Governance Explanations

Form 990, Part VI, Section B, Line 11B

“Prior to filing form 990, a special meeting of the audit & risk committee of the boston athenaeum, who is delegated authority to approve the return, was held. The return was presented by the director of finance, who was available to answer questions and to certify the accuracy of information provided on the return. The committee voted to approve the return based on examination of the return and certifications made by the director of finance. A complete copy of the form 990 was provided to the entire board via email, prior to filing.”

Form 990, Part VI, Section B, Line 12C

“The organization maintains a written conflicts-of-interest policy. The policy requires officers, directors, trustees and key employees to complete an annual conflicts-of-interest disclosure statement. The statements are discussed and considered per the policy at a meeting of the board of trustees.”

Form 990, Part VI, Section B, Line 15

“Each year the trustees evaluate the compensation of the executive director objectively, taking into account compensation paid by similar organizations for functionally comparable positions.”

Form 990, Part VI, Section C, Line 19

“The society's bylaws and conflict of interest policy are available for review upon request. The complete audited financial statements are available on the athenaeum's website: http://www.bostonathenaeum.org. The form 990 and audited financial statements are also available via the massachusetts attorney general's website.”

Filing and Contact Details

Filer

Filer Name
The Boston Library Society
EIN
04-1105450
Phone
6172270270
Address
10 12 BEACON STREET, BOSTON, MA 02108

Signing Officer

Name
F Javier Cevallos
Title
Treasurer
Phone
6172270270
Signed
2025-07-29
Discuss with paid preparer
Yes

Organization Details

Principal Officer
Leah Rosovsky
Formed
1794
Legal Domicile
Ma
Voting Board Members
10
Independent Board Members
10
Employees
0
Volunteers
10

Preparer

Firm
Cbiz Advisors LLC
Address
53 STATE STREET 17TH FLOOR, BOSTON, MA 02109
Preparer
Craig Klein
Phone
6178075000
Supplemental Narrative

Financial Statement Notes

PART X, LINE 2:

“The organization accounts for the effect of any uncertain tax positions based on a "more likely than not" threshold to the recognition of the tax positions being sustained based on the technical merits of the position under scrutiny by the applicable taxing authority. If a tax position or positions are deemed to result in uncertainties of those positions, the unrecognized tax benefit is estimated based on a "cumulative probability assessment" that aggregates the estimated tax liability for all uncertain tax positions. The organization has identified its tax status as a tax exempt entity and its treatment of income as related or unrelated as its only significant tax positions; however, the organization has determined that such tax positions do not result in an uncertainty requiring recognition. The organization is not currently under examination by any taxing jurisdictions. The organization's federal and state tax returns are generally open for examination for three years following the date filed.”

Raw XML AppendixShowing 400 of 472 raw XML fields

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/AccountantCompileOrReviewInd00
IRS990/ActivitiesConductedPrtshpInd00
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IRS990/AuditCommitteeInd01
IRS990/BooksInCareOfDetail/PersonNm0CHRISTOPHER J BOUDROT
IRS990/BooksInCareOfDetail/PhoneNum06177207642
IRS990/BooksInCareOfDetail/USAddress/AddressLine1Txt010 1/2 BEACON STREET
IRS990/BooksInCareOfDetail/USAddress/CityNm0BOSTON
IRS990/BooksInCareOfDetail/USAddress/StateAbbreviationCd0MA
IRS990/BooksInCareOfDetail/USAddress/ZIPCd002108
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IRS990/ConservationEasementsInd00
IRS990/ConsolidatedAuditFinclStmtInd01
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IRS990/CYInvestmentIncomeAmt038495
IRS990/CYOtherExpensesAmt00
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IRS990/DonorRstrOrQuasiEndowmentsInd00
IRS990/ElectionOfBoardMembersInd00
IRS990/EmployeeCnt00
IRS990/EngagedInExcessBenefitTransInd00
IRS990/ExpenseAmt054759
IRS990/FamilyOrBusinessRlnInd00
IRS990/FederalGrantAuditRequiredInd00
IRS990/ForeignActivitiesInd00
IRS990/ForeignFinancialAccountInd00
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IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd1X
IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd2X
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IRS990/Form990PartVIISectionAGrp/OfficerInd0X
IRS990/Form990PartVIISectionAGrp/OfficerInd1X
IRS990/Form990PartVIISectionAGrp/OfficerInd2X
IRS990/Form990PartVIISectionAGrp/OfficerInd3X
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IRS990/Form990PartVIISectionAGrp/TitleTxt0SECRETARY
IRS990/Form990PartVIISectionAGrp/TitleTxt1TREASURER
IRS990/Form990PartVIISectionAGrp/TitleTxt2TRUSTEE
IRS990/Form990PartVIISectionAGrp/TitleTxt3TRUSTEE
IRS990/Form990PartVIISectionAGrp/TitleTxt4TRUSTEE
IRS990/Form990PartVIISectionAGrp/TitleTxt5TRUSTEE
IRS990/Form990PartVIISectionAGrp/TitleTxt6TRUSTEE
IRS990/Form990PartVIISectionAGrp/TitleTxt7TRUSTEE
IRS990/Form990PartVIISectionAGrp/TitleTxt8TRUSTEE
IRS990/Form990PartVIISectionAGrp/TitleTxt9TRUSTEE
IRS990/Form990PartVIISectionAGrp/TitleTxt10DIRECTOR
IRS990/Form990PartVIISectionAGrp/TitleTxt11DIRECTOR OF FINANCE
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IRS990/FSAuditedInd01
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IRS990/GrantsToOrganizationsInd01
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IRS990/InfoInScheduleOPartVIInd0X
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IRS990/InvestmentIncomeGrp/TotalRevenueColumnAmt025865
IRS990/InvestmentInJointVentureInd00
IRS990/InvestmentsPubTradedSecGrp/BOYAmt0987552
IRS990/InvestmentsPubTradedSecGrp/EOYAmt01190664
IRS990/IRPDocumentCnt00
IRS990/IRPDocumentW2GCnt00
IRS990/LegalDomicileStateCd0MA
IRS990/LessCostOthBasisSalesExpnssGrp/SecuritiesAmt0174917
IRS990/LoanOutstandingInd00
IRS990/LobbyingActivitiesInd00
IRS990/LocalChaptersInd00
IRS990/MaterialDiversionOrMisuseInd00
IRS990/MembersOrStockholdersInd00
IRS990/MethodOfAccountingAccrualInd0X
IRS990/MinutesOfCommitteesInd01
IRS990/MinutesOfGoverningBodyInd01
IRS990/MissionDesc0SEE SCHEDULE 0.THE BOSTON LIBRARY SOCIETY ALLOCATES FUNDS TO THE BOSTON ATHENAEUM, A TAX-EXEMPT ORGANIZATION. THE BOSTON ATHENAEUM IS AN INDEPENDENT LIBRARY COMMITTED TO MAINTAINING AND AUGMENTING ITS SIGNIFICANT COLLECTIONS OF HISTORY, LITERATURE AND ART; TO SERVING A BROAD COMMUNITY OF SCHOLARS AS A CENTER FOR RESEARCH; TO SERVING ITS MEMBERSHIP AND THE PUBLIC NOT ONLY THROUGH ITS CIRCULATING AND REFERENCE COLLECTIONS BUT ALSO THROUGH LECTURES, EXHIBITIONS AND PUBLICATIONS; AND TO PRESERVING AND ENHANCING ITS NATIONAL HISTORIC LANDMARK BUILDING.
IRS990/MoreThan5000KToIndividualsInd00
IRS990/MoreThan5000KToOrgInd00
IRS990/NetAssetsOrFundBalancesBOYAmt0987552
IRS990/NetAssetsOrFundBalancesEOYAmt01190664
IRS990/NetGainOrLossInvestmentsGrp/ExclusionAmt012630
IRS990/NetGainOrLossInvestmentsGrp/TotalRevenueColumnAmt012630
IRS990/NetUnrelatedBusTxblIncmAmt00
IRS990/NetUnrlzdGainsLossesInvstAmt0219376
IRS990/NoDonorRestrictionNetAssetsGrp/BOYAmt0662992
IRS990/NoDonorRestrictionNetAssetsGrp/EOYAmt0799901
IRS990/NondeductibleContributionsInd00
IRS990/OfficerMailingAddressInd00
IRS990/OperateHospitalInd00
IRS990/Organization501c3Ind0X
IRS990/OrganizationFollowsFASB117Ind0X
IRS990/OtherChangesInNetAssetsAmt00
IRS990/OtherWebsiteInd0X
IRS990/PartialLiquidationInd00
IRS990/PayPremiumsPrsnlBnftCntrctInd00
IRS990/PoliticalCampaignActyInd00
IRS990/PrincipalOfficerNm0LEAH ROSOVSKY
IRS990/ProfessionalFundraisingInd00
IRS990/ProhibitedTaxShelterTransInd00
IRS990/PYBenefitsPaidToMembersAmt00
IRS990/PYContributionsGrantsAmt00
IRS990/PYExcessBenefitTransInd00
IRS990/PYGrantsAndSimilarPaidAmt054759
IRS990/PYInvestmentIncomeAmt029627
IRS990/PYOtherExpensesAmt00
IRS990/PYOtherRevenueAmt00
IRS990/PYProgramServiceRevenueAmt00
IRS990/PYRevenuesLessExpensesAmt0-25132
IRS990/PYSalariesCompEmpBnftPaidAmt00
IRS990/PYTotalExpensesAmt054759
IRS990/PYTotalProfFndrsngExpnsAmt00
IRS990/PYTotalRevenueAmt029627
IRS990/QuidProQuoContributionsInd00
IRS990/RcvFndsToPayPrsnlBnftCntrctInd00
IRS990/ReconcilationRevenueExpnssAmt0-16264
IRS990/RegularMonitoringEnfrcInd01
IRS990/RelatedEntityInd01
IRS990/RelatedOrganizationCtrlEntInd00
IRS990/ReportInvestmentsOtherSecInd00
IRS990/ReportLandBuildingEquipmentInd00
IRS990/ReportOtherAssetsInd00
IRS990/ReportOtherLiabilitiesInd00
IRS990/ReportProgramRelatedInvstInd00
IRS990ScheduleA/Form990SchASupportingOrgGrp/Contribution35ControlledInd00
IRS990ScheduleA/Form990SchASupportingOrgGrp/ContributionControllerInd00
IRS990ScheduleA/Form990SchASupportingOrgGrp/ContributionFamilyInd00
IRS990ScheduleA/Form990SchASupportingOrgGrp/ControlledDisqualifiedPrsnInd00
IRS990ScheduleA/Form990SchASupportingOrgGrp/DisqualifiedPrsnControllIntInd00
IRS990ScheduleA/Form990SchASupportingOrgGrp/DisqualifiedPrsnOwnrIntInd00
IRS990ScheduleA/Form990SchASupportingOrgGrp/ExcessBusinessHoldingsRulesInd00
IRS990ScheduleA/Form990SchASupportingOrgGrp/ListedByNameGoverningDocInd01
IRS990ScheduleA/Form990SchASupportingOrgGrp/LoanDisqualifiedPersonInd00
IRS990ScheduleA/Form990SchASupportingOrgGrp/OrganizationChangeSuprtOrgInd00
IRS990ScheduleA/Form990SchASupportingOrgGrp/PaymentSubstantialContribtrInd00
IRS990ScheduleA/Form990SchASupportingOrgGrp/SupportedOrgNotOrganizedUSInd00
IRS990ScheduleA/Form990SchASupportingOrgGrp/SupportedOrgSectionC456Ind00
IRS990ScheduleA/Form990SchASupportingOrgGrp/SupportNonSupportedOrgInd00
IRS990ScheduleA/Form990SchASupportingOrgGrp/SuprtOrgNoIRSDeterminationInd00
IRS990ScheduleA/Form990SchAType1SuprtOrgGrp/OperateBenefitNonSuprtOrgInd00
IRS990ScheduleA/Form990SchAType1SuprtOrgGrp/PowerAppointMajorityDirTrstInd01
IRS990ScheduleA/OtherSupportSumAmt00
IRS990ScheduleA/SupportedOrganizationsCnt01
IRS990ScheduleA/SupportedOrganizationsTotalCnt01
IRS990ScheduleA/SupportedOrgInformationGrp/EIN0042104852
IRS990ScheduleA/SupportedOrgInformationGrp/GoverningDocumentListedInd01
IRS990ScheduleA/SupportedOrgInformationGrp/OrganizationTypeCd07
IRS990ScheduleA/SupportedOrgInformationGrp/OtherSupportAmt00
IRS990ScheduleA/SupportedOrgInformationGrp/SupportAmt054759
IRS990ScheduleA/SupportedOrgInformationGrp/SupportedOrganizationName/BusinessNameLine1Txt0PROPRIETORS OF THE BOSTON ATHENAEUM
IRS990ScheduleA/SupportingOrganization509a3Ind0X
IRS990ScheduleA/SupportingOrgType1Ind0X
IRS990ScheduleA/SupportSumAmt054759
IRS990/ScheduleBRequiredInd00
IRS990ScheduleD/ExpensesNotReportedAmt00
IRS990ScheduleD/ExpensesNotRptFinclStmtAmt00
IRS990ScheduleD/ExpensesSubtotalAmt054759
IRS990ScheduleD/FootnoteTextInd0X
IRS990ScheduleD/NetUnrealizedGainsInvstAmt0219376
IRS990ScheduleD/RevenueNotReportedAmt0219376
IRS990ScheduleD/RevenueNotReportedFinclStmtAmt00
IRS990ScheduleD/RevenueSubtotalAmt038495
IRS990ScheduleD/SupplementalInformationDetail/ExplanationTxt0THE ORGANIZATION ACCOUNTS FOR THE EFFECT OF ANY UNCERTAIN TAX POSITIONS BASED ON A "MORE LIKELY THAN NOT" THRESHOLD TO THE RECOGNITION OF THE TAX POSITIONS BEING SUSTAINED BASED ON THE TECHNICAL MERITS OF THE POSITION UNDER SCRUTINY BY THE APPLICABLE TAXING AUTHORITY. IF A TAX POSITION OR POSITIONS ARE DEEMED TO RESULT IN UNCERTAINTIES OF THOSE POSITIONS, THE UNRECOGNIZED TAX BENEFIT IS ESTIMATED BASED ON A "CUMULATIVE PROBABILITY ASSESSMENT" THAT AGGREGATES THE ESTIMATED TAX LIABILITY FOR ALL UNCERTAIN TAX POSITIONS. THE ORGANIZATION HAS IDENTIFIED ITS TAX STATUS AS A TAX EXEMPT ENTITY AND ITS TREATMENT OF INCOME AS RELATED OR UNRELATED AS ITS ONLY SIGNIFICANT TAX POSITIONS; HOWEVER, THE ORGANIZATION HAS DETERMINED THAT SUCH TAX POSITIONS DO NOT RESULT IN AN UNCERTAINTY REQUIRING RECOGNITION. THE ORGANIZATION IS NOT CURRENTLY UNDER EXAMINATION BY ANY TAXING JURISDICTIONS. THE ORGANIZATION'S FEDERAL AND STATE TAX RETURNS ARE GENERALLY OPEN FOR EXAMINATION FOR THREE YEARS FOLLOWING THE DATE FILED.
IRS990ScheduleD/SupplementalInformationDetail/FormAndLineReferenceDesc0PART X, LINE 2:
IRS990ScheduleD/TotalBookValueLandBuildingsAmt00
IRS990ScheduleD/TotalExpensesPerForm990Amt054759
IRS990ScheduleD/TotalRevenuePerForm990Amt038495
IRS990ScheduleD/TotalRevEtcAuditedFinclStmtAmt0257871
IRS990ScheduleD/TotExpnsEtcAuditedFinclStmtAmt054759
IRS990ScheduleI/GrantRecordsMaintainedInd01
IRS990ScheduleI/RecipientTable/CashGrantAmt054759
IRS990ScheduleI/RecipientTable/IRCSectionDesc0501(C)(3)
IRS990ScheduleI/RecipientTable/NonCashAssistanceAmt00
IRS990ScheduleI/RecipientTable/PurposeOfGrantTxt0GENERAL GRANT
IRS990ScheduleI/RecipientTable/RecipientBusinessName/BusinessNameLine1Txt0PROPRIETORS OF THE BOSTON ATHENAEUM
IRS990ScheduleI/RecipientTable/RecipientEIN0042104852
IRS990ScheduleI/RecipientTable/USAddress/AddressLine1Txt010 1/2 BEACON STREET
IRS990ScheduleI/RecipientTable/USAddress/CityNm0BOSTON
IRS990ScheduleI/RecipientTable/USAddress/StateAbbreviationCd0MA
IRS990ScheduleI/RecipientTable/USAddress/ZIPCd002110
IRS990ScheduleI/SupplementalInformationDetail/ExplanationTxt0THE BOSTON LIBRARY SOCIETY IS A SUPPORTING ORGANIZATION. IT MAKES GRANTS TO ITS SUPPORTED ORGANIZATION, PROPRIETORS OF THE BOSTON ATHENAEUM.
IRS990ScheduleI/SupplementalInformationDetail/FormAndLineReferenceDesc0PART I, LINE 2:
IRS990ScheduleI/Total501c3OrgCnt01
IRS990ScheduleI/TotalOtherOrgCnt00
IRS990ScheduleJ/AnyNonFixedPaymentsInd00
IRS990ScheduleJ/CompBasedOnRevenueOfFlngOrgInd00
IRS990ScheduleJ/CompBsdNetEarnsFlngOrgInd00
IRS990ScheduleJ/CompBsdNetEarnsRltdOrgsInd00
IRS990ScheduleJ/CompBsdOnRevRelatedOrgsInd00
IRS990ScheduleJ/EquityBasedCompArrngmInd00
IRS990ScheduleJ/InitialContractExceptionInd00
IRS990/ScheduleJRequiredInd01
IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/BaseCompensationFilingOrgAmt00
IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/BaseCompensationFilingOrgAmt10
IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/BonusFilingOrganizationAmount00
IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/BonusFilingOrganizationAmount10
IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/BonusRelatedOrganizationsAmt00
IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/BonusRelatedOrganizationsAmt10
IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/CompensationBasedOnRltdOrgsAmt0348152
IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/CompensationBasedOnRltdOrgsAmt1166534
IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/CompReportPrior990FilingOrgAmt00
IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/CompReportPrior990FilingOrgAmt10
IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/CompReportPrior990RltdOrgsAmt00
IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/CompReportPrior990RltdOrgsAmt10
IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/DeferredCompensationFlngOrgAmt00
IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/DeferredCompensationFlngOrgAmt10
IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/DeferredCompRltdOrgsAmt028284
IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/DeferredCompRltdOrgsAmt113947
IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/NontaxableBenefitsFilingOrgAmt00
IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/NontaxableBenefitsFilingOrgAmt10
IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/NontaxableBenefitsRltdOrgsAmt01764
IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/NontaxableBenefitsRltdOrgsAmt129111
IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/OtherCompensationFilingOrgAmt00
IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/OtherCompensationFilingOrgAmt10
IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/OtherCompensationRltdOrgsAmt04572
IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/OtherCompensationRltdOrgsAmt1807
IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/PersonNm0LEAH ROSOVSKY
IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/PersonNm1CHRISTOPHER BOUDROT
IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/TitleTxt0DIRECTOR
IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/TitleTxt1DIRECTOR OF FINANCE
IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/TotalCompensationFilingOrgAmt00
IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/TotalCompensationFilingOrgAmt10
IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/TotalCompensationRltdOrgsAmt0382772
IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/TotalCompensationRltdOrgsAmt1210399
IRS990ScheduleJ/SeverancePaymentInd00
IRS990ScheduleJ/SupplementalNonqualRtrPlanInd00
IRS990/ScheduleORequiredInd01
IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt0PRIOR TO FILING FORM 990, A SPECIAL MEETING OF THE AUDIT & RISK COMMITTEE OF THE BOSTON ATHENAEUM, WHO IS DELEGATED AUTHORITY TO APPROVE THE RETURN, WAS HELD. THE RETURN WAS PRESENTED BY THE DIRECTOR OF FINANCE, WHO WAS AVAILABLE TO ANSWER QUESTIONS AND TO CERTIFY THE ACCURACY OF INFORMATION PROVIDED ON THE RETURN. THE COMMITTEE VOTED TO APPROVE THE RETURN BASED ON EXAMINATION OF THE RETURN AND CERTIFICATIONS MADE BY THE DIRECTOR OF FINANCE. A COMPLETE COPY OF THE FORM 990 WAS PROVIDED TO THE ENTIRE BOARD VIA EMAIL, PRIOR TO FILING.
IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt1THE ORGANIZATION MAINTAINS A WRITTEN CONFLICTS-OF-INTEREST POLICY. THE POLICY REQUIRES OFFICERS, DIRECTORS, TRUSTEES AND KEY EMPLOYEES TO COMPLETE AN ANNUAL CONFLICTS-OF-INTEREST DISCLOSURE STATEMENT. THE STATEMENTS ARE DISCUSSED AND CONSIDERED PER THE POLICY AT A MEETING OF THE BOARD OF TRUSTEES.
IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt2EACH YEAR THE TRUSTEES EVALUATE THE COMPENSATION OF THE EXECUTIVE DIRECTOR OBJECTIVELY, TAKING INTO ACCOUNT COMPENSATION PAID BY SIMILAR ORGANIZATIONS FOR FUNCTIONALLY COMPARABLE POSITIONS.
IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt3THE SOCIETY'S BYLAWS AND CONFLICT OF INTEREST POLICY ARE AVAILABLE FOR REVIEW UPON REQUEST. THE COMPLETE AUDITED FINANCIAL STATEMENTS ARE AVAILABLE ON THE ATHENAEUM'S WEBSITE: HTTP://WWW.BOSTONATHENAEUM.ORG. THE FORM 990 AND AUDITED FINANCIAL STATEMENTS ARE ALSO AVAILABLE VIA THE MASSACHUSETTS ATTORNEY GENERAL'S WEBSITE.
IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc0FORM 990, PART VI, SECTION B, LINE 11B
IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc1FORM 990, PART VI, SECTION B, LINE 12C
IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc2FORM 990, PART VI, SECTION B, LINE 15
IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc3FORM 990, PART VI, SECTION C, LINE 19
IRS990ScheduleR/AssetExchangeInd00
IRS990ScheduleR/AssetPurchaseFromOtherOrgInd00
IRS990ScheduleR/AssetSaleToOtherOrgInd00
IRS990ScheduleR/DivRelatedOrganizationInd00
IRS990ScheduleR/GiftGrntCapContriFromOthOrgInd00
IRS990ScheduleR/GiftGrntOrCapContriToOthOrgInd01
IRS990ScheduleR/IdRelatedTaxExemptOrgGrp/ControlledOrganizationInd00
IRS990ScheduleR/IdRelatedTaxExemptOrgGrp/DirectControllingNACd0N/A
IRS990ScheduleR/IdRelatedTaxExemptOrgGrp/DisregardedEntityName/BusinessNameLine1Txt0PROPRIETORS OF THE BOSTON ATHENAEUM
IRS990ScheduleR/IdRelatedTaxExemptOrgGrp/EIN0042104852
IRS990ScheduleR/IdRelatedTaxExemptOrgGrp/ExemptCodeSectionTxt0501(C)(3)
IRS990ScheduleR/IdRelatedTaxExemptOrgGrp/LegalDomicileStateCd0MA
IRS990ScheduleR/IdRelatedTaxExemptOrgGrp/PrimaryActivitiesTxt0INDEPENDENT LIBRARY SERVING A BROAD COMMUNITY AS A CENTER FOR RESEARCH
IRS990ScheduleR/IdRelatedTaxExemptOrgGrp/PublicCharityStatusTxt0LINE 7
IRS990ScheduleR/IdRelatedTaxExemptOrgGrp/USAddress/AddressLine1Txt010 1/2 BEACON STREET
IRS990ScheduleR/IdRelatedTaxExemptOrgGrp/USAddress/CityNm0BOSTON
IRS990ScheduleR/IdRelatedTaxExemptOrgGrp/USAddress/StateAbbreviationCd0MA
IRS990ScheduleR/IdRelatedTaxExemptOrgGrp/USAddress/ZIPCd002110
IRS990ScheduleR/LoansOrGuaranteesFromOthOrgInd00
IRS990ScheduleR/LoansOrGuaranteesToOtherOrgInd00
IRS990ScheduleR/PaidEmployeesSharingInd00
IRS990ScheduleR/PerformOfServicesByOtherOrgInd00
IRS990ScheduleR/PerformOfServicesForOthOrgInd00
IRS990ScheduleR/ReceiptOfIntAnntsRntsRyltsInd00
IRS990ScheduleR/ReimbursementPaidByOtherOrgInd00
IRS990ScheduleR/ReimbursementPaidToOtherOrgInd00
IRS990ScheduleR/RentalOfFacilitiesToOthOrgInd00
IRS990ScheduleR/RentalOfFcltsFromOthOrgInd00
IRS990ScheduleR/SharingOfFacilitiesInd00
IRS990ScheduleR/TransactionsRelatedOrgGrp/InvolvedAmt054759
IRS990ScheduleR/TransactionsRelatedOrgGrp/MethodOfAmountDeterminationTxt0BOOK VALUE
IRS990ScheduleR/TransactionsRelatedOrgGrp/OtherOrganizationName/BusinessNameLine1Txt0PROPRIETORS OF THE BOSTON ATHENAEUM
IRS990ScheduleR/TransactionsRelatedOrgGrp/TransactionTypeTxt0B
IRS990ScheduleR/TransferFromOtherOrgInd00
IRS990ScheduleR/TransferToOtherOrgInd00
IRS990/SchoolOperatingInd00
IRS990/SignificantChangeInd00
IRS990/SignificantNewProgramSrvcInd00
IRS990/StatesWhereCopyOfReturnIsFldCd0MA
IRS990/SubjectToExcsTaxNetInvstIncInd00
IRS990/SubjectToProxyTaxInd00
IRS990/SubjToTaxRmnrtnExPrchtPymtInd00

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