Tinker Island Foundation

EIN 47-3423358 • Boston, MA

7 Water StreetBoston, MA 02109

Siviq Scores

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

0.00x

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

$25M-$50M nonprofits • Source year 2024

0.00x

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

$25M-$50M nonprofits • Source year 2024

95%

Higher net margin than 98% of similar nonprofits.

$25M-$50M nonprofits • Source year 2024

$5,229

Higher top officer pay than 58% of similar nonprofits.

Top officer pay equals 0.0% of source-year revenue.

$25M-$50M nonprofits • Source year 2024

256%

Faster asset growth than 99% of similar nonprofits.

$25M-$50M nonprofits • Annualized from 2023 to 2024

54%

Faster revenue growth than 85% of similar nonprofits.

$25M-$50M nonprofits • Annualized from 2023 to 2024

Balance Sheet

Liabilities / Assets15th percentile

Assets

$26,648,607

Up $19,155,855 (+256%) from 2023

Liabilities

Flat

Flat from 2023

Net Assets

$26,648,607

Up $19,155,855 (+256%) from 2023

Operations

Liabilities / Revenue15th percentile Net Margin98th percentile

Revenue

$23,251,680

Up $8,189,366 (+54%) from 2023

Expenses

Down

$1,052,904

Down $39,607 (-3.6%) from 2023

Net Income

$22,198,776

Up $8,228,973 (+59%) from 2023

Trend Graphs

Balance Sheet Trend

Asset Growth99th percentile

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

Highlighted filing

2024

Assets$26,648,607

Liabilities$0

Net Assets$26,648,607

Open 2024 Filing

Operations Trend

Revenue Growth85th percentile

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

Highlighted filing

2024

Revenue$23,251,680

Expenses$1,052,904

Net Income$22,198,776

Open 2024 Filing

Filings

Most recent year

2024 • Form 990PFDetailed filing. Detailed filing data is available for this year.

Open filing

Assets: $26,648,607
Liabilities: $0
Net assets: $26,648,607
Revenue: $23,251,680
Expenses: $1,052,904
Net income: $22,198,776

	Balance Sheet			Operations
Year	Assets	Liabilities	Net Assets	Revenue	Expenses	Net Income
2024Detailed filing. Detailed filing data is available for this year.	$26.6	$0.00	$26.6	$23.3	$1.05	$22.2
2023Detailed filing. Detailed filing data is available for this year.	$7.49	$0.00	$7.49	$15.1	$1.09	$14.0
2022Detailed filing. Detailed filing data is available for this year.	$1.04	$0.00	$1.04	$2.53	$2.47	$0.06
2021Detailed filing. Detailed filing data is available for this year.	$1.08	$0.00	$1.08	$0.29	$2.77	$2.47
2020Detailed filing. Detailed filing data is available for this year.	$0.99	$0.00	$0.99	$0.15	$2.09	$1.94
2019Detailed filing. Detailed filing data is available for this year.	$2.92	$0.00	$2.92	$3.88	$1.86	$2.03
2015Summary only. Only limited summary data is available for this year.	$0.54	$0.00		$0.55	$0.01	$0.54

Latest Filing Detail

Jump To

Filing Snapshot

Filing Period: Jan 1, 2024 to Dec 31, 2024
Signed: Nov 4, 2025
Return Version: 2024v5.2

Compensation and Service Providers

Top Officer Pay58th percentile

Employees

Name	Title	Full / Part Time	Base	Other	Total
DANIEL M ARDITO	Treasurer	-	$4,594	$635	$5,229
EDWARD C JOHNSON IV	President & Secretary	-	$0	-	-

Filing and Contact Details

Filer

Filer Name: Tinker Island Foundation
EIN: 47-3423358
Phone: 6036814291
Address: 7 WATER STREET, BOSTON, MA 02109

Signing Officer

Name: Daniel Ardito
Title: Treasurer
Phone: 6036814291
Signed: 2025-11-04
Discuss with paid preparer: Yes

Preparer

Firm: Grant Thornton Advisors LLC
Address: 53 STATE STREET SUITE 1600, BOSTON, MA 02109
Preparer: Erin Couture
Phone: 6177237900

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This appendix keeps the raw XML leaves available for debugging and edge-case review. The human report above is the primary experience.

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IRS990PF/StatementsRegardingActyGrp/NewSubstantialContributorsInd	0	0
IRS990PF/StatementsRegardingActyGrp/OrganizationDissolvedEtcInd	0	0
IRS990PF/StatementsRegardingActyGrp/OrgReportOrRegisterStateCd	0	MA
IRS990PF/StatementsRegardingActyGrp/OrgReportOrRegisterStateCd	1	DE
IRS990PF/StatementsRegardingActyGrp/OwnControlledEntityInd	0	0
IRS990PF/StatementsRegardingActyGrp/PersonsWithBooksName/BusinessNameLine1Txt	0	DANIEL M ARDITO
IRS990PF/StatementsRegardingActyGrp/PhoneNum	0	6036814291
IRS990PF/StatementsRegardingActyGrp/PrivateOperatingFoundationInd	0	0
IRS990PF/StatementsRegardingActyGrp/Section4955ManagersTaxAmt	0	0
IRS990PF/StatementsRegardingActyGrp/Section4955OrganizationTaxAmt	0	0
IRS990PF/StatementsRegardingActyGrp/Section508eRqrSatisfiedInd	0	1
IRS990PF/StatementsRegardingActyGrp/TaxReimbursedAmt	0	0
IRS990PF/StatementsRegardingActyGrp/UnrelatedBusIncmOverLimitInd	0	0
IRS990PF/StatementsRegardingActyGrp/WebsiteAddressTxt	0	N/A
IRS990PF/SumOfProgramRelatedInvstGrp/TotalAmt	0	0
IRS990PF/SupplementaryInformationGrp/ContributingManagerNm	0	EDWARD C JOHNSON IV
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/Amt	0	500000
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/Amt	1	285000
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/GrantOrContributionPurposeTxt	0	PROGRAM DEVELOPMENT
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/GrantOrContributionPurposeTxt	1	PROGRAM DEVELOPMENT
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientBusinessName/BusinessNameLine1Txt	0	FIDELITY CHARITABLE GIFT FUND
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientBusinessName/BusinessNameLine1Txt	1	NOW AND THERE INC
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientFoundationStatusTxt	0	PC
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientFoundationStatusTxt	1	PC
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientUSAddress/AddressLine1Txt	0	PO BOX 770001
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientUSAddress/AddressLine1Txt	1	186 SOUTH ST STE 302
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientUSAddress/CityNm	0	CINCINNATI
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientUSAddress/CityNm	1	BOSTON
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientUSAddress/StateAbbreviationCd	0	OH
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientUSAddress/StateAbbreviationCd	1	MA
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientUSAddress/ZIPCd	0	45277
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientUSAddress/ZIPCd	1	02111
IRS990PF/SupplementaryInformationGrp/OnlyContriToPreselectedInd	0	X
IRS990PF/SupplementaryInformationGrp/TotalGrantOrContriApprvFutAmt	0	0
IRS990PF/SupplementaryInformationGrp/TotalGrantOrContriPdDurYrAmt	0	785000
IRS990PF/TrnsfrTransRlnNonchrtblEOGrp/LoansOrLoanGuaranteesInd	0	0
IRS990PF/TrnsfrTransRlnNonchrtblEOGrp/PerformanceOfServicesEtcInd	0	0
IRS990PF/TrnsfrTransRlnNonchrtblEOGrp/PurchaseOfAssetsNonchrtblEOInd	0	0
IRS990PF/TrnsfrTransRlnNonchrtblEOGrp/ReimbursementArrangementsInd	0	0
IRS990PF/TrnsfrTransRlnNonchrtblEOGrp/RelationshipsNonchrtblEOInd	0	0
IRS990PF/TrnsfrTransRlnNonchrtblEOGrp/RentalOfFacilitiesOthAssetsInd	0	0
IRS990PF/TrnsfrTransRlnNonchrtblEOGrp/SalesOrExchangesOfAssetsInd	0	0
IRS990PF/TrnsfrTransRlnNonchrtblEOGrp/SharingOfFacilitiesEtcInd	0	0
IRS990PF/TrnsfrTransRlnNonchrtblEOGrp/TrnsfrOfCashToNonchrtblEOInd	0	0
IRS990PF/TrnsfrTransRlnNonchrtblEOGrp/TrnsfrOtherAssetNonchrtblEOInd	0	0
IRS990PF/UndistributedIncomeGrp/AppliedToCurrentYearAmt	0	63831
IRS990PF/UndistributedIncomeGrp/AppliedToPriorYearsAmt	0	0
IRS990PF/UndistributedIncomeGrp/AppliedToYear1Amt	0	738204
IRS990PF/UndistributedIncomeGrp/CorpusDistri170b1EOr4942g3Amt	0	0
IRS990PF/UndistributedIncomeGrp/DistributableAsAdjustedAmt	0	1179760
IRS990PF/UndistributedIncomeGrp/ExcessDistributionCyovAppCYAmt	0	0
IRS990PF/UndistributedIncomeGrp/ExcessDistriCyovAppCYCorpusAmt	0	0
IRS990PF/UndistributedIncomeGrp/ExcessDistriCyovFromYr5Amt	0	0
IRS990PF/UndistributedIncomeGrp/ExcessDistriCyovToNextYrAmt	0	0
IRS990PF/UndistributedIncomeGrp/PriorYearDeficiencyOrTaxAmt	0	0
IRS990PF/UndistributedIncomeGrp/PriorYearUndistributedIncmAmt	0	0
IRS990PF/UndistributedIncomeGrp/QualifyingDistributionsAmt	0	802035
IRS990PF/UndistributedIncomeGrp/RemainingDistriFromCorpusAmt	0	0
IRS990PF/UndistributedIncomeGrp/Taxable1Amt	0	0
IRS990PF/UndistributedIncomeGrp/Taxable2Amt	0	0
IRS990PF/UndistributedIncomeGrp/TotalCorpusAmt	0	0
IRS990PF/UndistributedIncomeGrp/TotalExcessDistributionCyovAmt	0	0
IRS990PF/UndistributedIncomeGrp/TotalForPriorYearsAmt	0	0
IRS990PF/UndistributedIncomeGrp/TreatedAsDistriFromCorpusAmt	0	0
IRS990PF/UndistributedIncomeGrp/UndistributedIncomeCYAmt	0	1115929
IRS990PF/UndistributedIncomeGrp/UndistributedIncomePYAmt	0	738204
IRS990ScheduleB/ContributorInformationGrp/ContributorBusinessName/BusinessNameLine1Txt	0	EDWARD C JOHNSON FUND
IRS990ScheduleB/ContributorInformationGrp/ContributorBusinessName/BusinessNameLine1Txt	1	EDWARD C JOHNSON IV
IRS990ScheduleB/ContributorInformationGrp/ContributorBusinessName/BusinessNameLine1Txt	2	EDWARD C JOHNSON IV
IRS990ScheduleB/ContributorInformationGrp/ContributorBusinessName/BusinessNameLine1Txt	3	EDWARD C JOHNSON IV
IRS990ScheduleB/ContributorInformationGrp/ContributorNum	0	1
IRS990ScheduleB/ContributorInformationGrp/ContributorNum	1	2
IRS990ScheduleB/ContributorInformationGrp/ContributorNum	2	3
IRS990ScheduleB/ContributorInformationGrp/ContributorNum	3	4
IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/AddressLine1Txt	0	7 WATER STREET
IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/AddressLine1Txt	1	7 WATER STREET
IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/AddressLine1Txt	2	7 WATER STREET
IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/AddressLine1Txt	3	7 WATER STREET
IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/CityNm	0	BOSTON
IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/CityNm	1	BOSTON
IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/CityNm	2	BOSTON
IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/CityNm	3	BOSTON
IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/StateAbbreviationCd	0	MA
IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/StateAbbreviationCd	1	MA
IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/StateAbbreviationCd	2	MA
IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/StateAbbreviationCd	3	MA
IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/ZIPCd	0	02109
IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/ZIPCd	1	02109
IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/ZIPCd	2	02109
IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/ZIPCd	3	02109
IRS990ScheduleB/ContributorInformationGrp/NoncashContributionInd	0	X
IRS990ScheduleB/ContributorInformationGrp/NoncashContributionInd	1	X
IRS990ScheduleB/ContributorInformationGrp/NoncashContributionInd	2	X
IRS990ScheduleB/ContributorInformationGrp/PersonContributionInd	0	X
IRS990ScheduleB/ContributorInformationGrp/PersonContributionInd	1	X
IRS990ScheduleB/ContributorInformationGrp/PersonContributionInd	2	X
IRS990ScheduleB/ContributorInformationGrp/PersonContributionInd	3	X
IRS990ScheduleB/ContributorInformationGrp/TotalContributionsAmt	0	827500
IRS990ScheduleB/ContributorInformationGrp/TotalContributionsAmt	1	852385
IRS990ScheduleB/ContributorInformationGrp/TotalContributionsAmt	2	1161194
IRS990ScheduleB/ContributorInformationGrp/TotalContributionsAmt	3	1304801
IRS990ScheduleB/GeneralRuleInd	0	X
IRS990ScheduleB/NonCashPropertyContributionGrp/ContributorNum	0	2
IRS990ScheduleB/NonCashPropertyContributionGrp/ContributorNum	1	3
IRS990ScheduleB/NonCashPropertyContributionGrp/ContributorNum	2	4
IRS990ScheduleB/NonCashPropertyContributionGrp/FairMarketValueAmt	0	852385
IRS990ScheduleB/NonCashPropertyContributionGrp/FairMarketValueAmt	1	1161194
IRS990ScheduleB/NonCashPropertyContributionGrp/FairMarketValueAmt	2	1304801
IRS990ScheduleB/NonCashPropertyContributionGrp/NoncashPropertyDesc	0	33,067 SHARES BEAM THERAPEUTICS INC.
IRS990ScheduleB/NonCashPropertyContributionGrp/NoncashPropertyDesc	1	43,071 SHARES BEAM THERAPEUTICS INC.
IRS990ScheduleB/NonCashPropertyContributionGrp/NoncashPropertyDesc	2	44,966 SHARES BEAM THERAPEUTICS INC.
IRS990ScheduleB/NonCashPropertyContributionGrp/ReceivedDt	0	2024-04-15
IRS990ScheduleB/NonCashPropertyContributionGrp/ReceivedDt	1	2024-07-17
IRS990ScheduleB/NonCashPropertyContributionGrp/ReceivedDt	2	2024-11-12
IRS990ScheduleB/Organization501c3ExemptPFInd	0	X
LegalFeesSchedule/LegalFeesGrp/CategoryTxt	0	LEGAL FEES
LegalFeesSchedule/LegalFeesGrp/DisbursementsCharitablePrpsAmt	0	958
LegalFeesSchedule/LegalFeesGrp/LegalFeesAmt	0	958
LegalFeesSchedule/LegalFeesGrp/NetInvestmentIncomeAmt	0	0
OtherDecreasesSchedule/OtherDecreasesDetail/Amt	0	3047023
OtherDecreasesSchedule/OtherDecreasesDetail/Desc	0	DIFFERENCE BETWEEN MARKET VALUE AND TAX COST OF NON-CASH CONTRIBUTIONS
OtherExpensesSchedule/OtherExpensesScheduleGrp/Desc	0	ADR FEES
OtherExpensesSchedule/OtherExpensesScheduleGrp/Desc	1	STATE FILING FEE
OtherExpensesSchedule/OtherExpensesScheduleGrp/DisbursementsCharitablePrpsAmt	0	0
OtherExpensesSchedule/OtherExpensesScheduleGrp/DisbursementsCharitablePrpsAmt	1	755
OtherExpensesSchedule/OtherExpensesScheduleGrp/NetInvestmentIncomeAmt	0	7868
OtherExpensesSchedule/OtherExpensesScheduleGrp/NetInvestmentIncomeAmt	1	0
OtherExpensesSchedule/OtherExpensesScheduleGrp/RevenueAndExpensesPerBooksAmt	0	7869
OtherExpensesSchedule/OtherExpensesScheduleGrp/RevenueAndExpensesPerBooksAmt	1	755
OtherIncreasesSchedule/OtherIncreasesDetail/Amt	0	4102
OtherIncreasesSchedule/OtherIncreasesDetail/Desc	0	BOOK TO TAX ADJUSTMENT
TaxesSchedule/TaxesDetail/Amt	0	243000
TaxesSchedule/TaxesDetail/CategoryTxt	0	FEDERAL EXCISE TAX
TaxesSchedule/TaxesDetail/DisbursementsCharitablePrpsAmt	0	0
TaxesSchedule/TaxesDetail/NetInvestmentIncomeAmt	0	0
ReturnHeader/BuildTS	0	2025-03-06 01:10:19Z
ReturnHeader/BusinessOfficerGrp/DiscussWithPaidPreparerInd	0	1
ReturnHeader/BusinessOfficerGrp/PersonNm	0	DANIEL ARDITO
ReturnHeader/BusinessOfficerGrp/PersonTitleTxt	0	TREASURER
ReturnHeader/BusinessOfficerGrp/PhoneNum	0	6036814291
ReturnHeader/BusinessOfficerGrp/SignatureDt	0	2025-11-04
ReturnHeader/Filer/BusinessName/BusinessNameLine1Txt	0	TINKER ISLAND FOUNDATION
ReturnHeader/Filer/BusinessNameControlTxt	0	TINK
ReturnHeader/Filer/EIN	0	473423358
ReturnHeader/Filer/PhoneNum	0	6036814291
ReturnHeader/Filer/USAddress/AddressLine1Txt	0	7 WATER STREET
ReturnHeader/Filer/USAddress/CityNm	0	BOSTON
ReturnHeader/Filer/USAddress/StateAbbreviationCd	0	MA
ReturnHeader/Filer/USAddress/ZIPCd	0	02109
ReturnHeader/IRSResponsiblePrtyInfoCurrInd	0	1
ReturnHeader/PreparerFirmGrp/PreparerFirmEIN	0	991856619
ReturnHeader/PreparerFirmGrp/PreparerFirmName/BusinessNameLine1Txt	0	GRANT THORNTON ADVISORS LLC
ReturnHeader/PreparerFirmGrp/PreparerUSAddress/AddressLine1Txt	0	53 STATE STREET SUITE 1600
ReturnHeader/PreparerFirmGrp/PreparerUSAddress/CityNm	0	BOSTON
ReturnHeader/PreparerFirmGrp/PreparerUSAddress/StateAbbreviationCd	0	MA
ReturnHeader/PreparerFirmGrp/PreparerUSAddress/ZIPCd	0	02109
ReturnHeader/PreparerPersonGrp/PhoneNum	0	6177237900
ReturnHeader/PreparerPersonGrp/PreparerPersonNm	0	ERIN COUTURE
ReturnHeader/ReturnTs	0	2025-11-04T04:59:16-06:00
ReturnHeader/ReturnTypeCd	0	990PF
ReturnHeader/TaxPeriodBeginDt	0	2024-01-01
ReturnHeader/TaxPeriodEndDt	0	2024-12-31
ReturnHeader/TaxYr	0	2024

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