WIKIMEDIA ENDOWMENT: Form 990, tax year 2023

View the entire original 990 at ProPublica ↗

Organization: WIKIMEDIA ENDOWMENT (EIN 87-3024488)
Tax period: 2023-07-01 to 2024-06-30
Filed: 2026-05-15
IRS object ID: 202631359349308453
Schema version: 2023v6.0
Source: Download XML · Original 990 at ProPublica

Every field in the e-filed return. Faint text is the IRS element name, for citing.

Return header
Form 990
Schedule A
Schedule B
Schedule D
Schedule F
Schedule I
Schedule M
Schedule O

Return header ReturnHeader

Field	Value	IRS element (for citing)
Return	2026-05-15T10:30:14+00:00	ReturnTs
Tax Period End	2024-06-30	TaxPeriodEndDt

Preparer Firm PreparerFirmGrp

Field	Value	IRS element (for citing)
Preparer Firm EIN	135381590	PreparerFirmEIN

Preparer Firm Name PreparerFirmName

Field	Value	IRS element (for citing)
Business Name Line1	BDO USA	BusinessNameLine1Txt

Preparer US Address PreparerUSAddress

Field	Value	IRS element (for citing)
Address Line1	601 UNION ST STE 2300	AddressLine1Txt
City	SEATTLE	CityNm
State Abbreviation	WA	StateAbbreviationCd
ZIP	981012317	ZIPCd

Field	Value	IRS element (for citing)
Return Type	990	ReturnTypeCd
Tax Period Begin	2023-07-01	TaxPeriodBeginDt

Filer Filer

Field	Value	IRS element (for citing)
EIN	873024488	EIN

Business Name BusinessName

Field	Value	IRS element (for citing)
Business Name Line1	WIKIMEDIA ENDOWMENT	BusinessNameLine1Txt

Field	Value	IRS element (for citing)
Business Name Control	WIKI	BusinessNameControlTxt
Phone	4158396885	PhoneNum

US Address USAddress

Field	Value	IRS element (for citing)
Address Line1	1 Sansome Street Suite 1895	AddressLine1Txt
City	San Francisco	CityNm
State Abbreviation	CA	StateAbbreviationCd
ZIP	94104	ZIPCd

Business Officer BusinessOfficerGrp

Field	Value	IRS element (for citing)
Person	Dhaval Patel	PersonNm
Person Title	Treasurer	PersonTitleTxt
Phone	4158396885	PhoneNum
Signature	2026-05-15	SignatureDt
Discuss With Paid Preparer	false	DiscussWithPaidPreparerInd

Field	Value	IRS element (for citing)
IRS Responsible Prty Info Curr	Yes (true)	IRSResponsiblePrtyInfoCurrInd

Preparer Person PreparerPersonGrp

Field	Value	IRS element (for citing)
Preparer Person	MATTHEW FRERKER	PreparerPersonNm
PTIN	P01677675	PTIN
Phone	2063827777	PhoneNum
Preparation	2026-05-15	PreparationDt

Field	Value	IRS element (for citing)
Tax	2023	TaxYr
Build TS	2025-03-06 01:10:19Z	BuildTS

Form 990 IRS990

Field	Value	IRS element (for citing)
Amended Return	Yes (X)	AmendedReturnInd

Principal Ofcr Business Name PrincipalOfcrBusinessName

Field	Value	IRS element (for citing)
Business Name Line1	Dhaval Patel	BusinessNameLine1Txt

US Address USAddress

Field	Value	IRS element (for citing)
Address Line1	1 Sansome Street Suite 1895	AddressLine1Txt
City	San Francisco	CityNm
State Abbreviation	CA	StateAbbreviationCd
ZIP	94104	ZIPCd

Field	Value	IRS element (for citing)
Gross Receipts	$134,879,469	GrossReceiptsAmt
Group Return For Affiliates	false	GroupReturnForAffiliatesInd
Organization501c3	Yes (X)	Organization501c3Ind
Website Address	HTTPS://WIKIMEDIAENDOWMENT.ORG/	WebsiteAddressTxt
Type Of Organization Corp	Yes (X)	TypeOfOrganizationCorpInd
Formation	2021	FormationYr
Legal Domicile State	CA	LegalDomicileStateCd
Activity Or Mission	The mission of the Wikimedia Endowment is to act as a permanent fund that can support in perpetuity the operations and activities of current and future Wikimedia projects, which are projects that are approved by and advance the purposes of the Wikimedia Foundation or its successor if the Wikimedia Foundation ceases to exist. It aims to create a solid financial foundation for the future of Wikimedia projects.	ActivityOrMissionDesc
Voting Members Governing Body	11	VotingMembersGoverningBodyCnt
Voting Members Independent	11	VotingMembersIndependentCnt
Total Employee	0	TotalEmployeeCnt
Total Volunteers	11	TotalVolunteersCnt
Total Gross UBI	$0	TotalGrossUBIAmt
Net Unrelated Bus Txbl Incm	$0	NetUnrelatedBusTxblIncmAmt
CY Contributions Grants	$129,605,799	CYContributionsGrantsAmt
CY Program Service Revenue	$0	CYProgramServiceRevenueAmt
CY Investment Income	$2,412,407	CYInvestmentIncomeAmt
CY Other Revenue	$0	CYOtherRevenueAmt
PY Total Revenue	$0	PYTotalRevenueAmt
CY Total Revenue	$132,018,206	CYTotalRevenueAmt
CY Grants And Similar Paid	$2,878,345	CYGrantsAndSimilarPaidAmt
CY Benefits Paid To Members	$0	CYBenefitsPaidToMembersAmt
CY Salaries Comp Emp Bnft Paid	$0	CYSalariesCompEmpBnftPaidAmt
CY Total Prof Fndrsng Expns	$0	CYTotalProfFndrsngExpnsAmt
CY Total Fundraising Expense	$1,170,684	CYTotalFundraisingExpenseAmt
CY Other Expenses	$2,106,672	CYOtherExpensesAmt
CY Total Expenses	$4,985,017	CYTotalExpensesAmt
PY Revenues Less Expenses	$0	PYRevenuesLessExpensesAmt
CY Revenues Less Expenses	$127,033,189	CYRevenuesLessExpensesAmt
Total Assets BOY	$0	TotalAssetsBOYAmt
Total Assets EOY	$144,325,622	TotalAssetsEOYAmt
Total Liabilities BOY	$0	TotalLiabilitiesBOYAmt
Total Liabilities EOY	$0	TotalLiabilitiesEOYAmt
Net Assets Or Fund Balances BOY	$0	NetAssetsOrFundBalancesBOYAmt
Net Assets Or Fund Balances EOY	$144,325,622	NetAssetsOrFundBalancesEOYAmt
Mission	The mission of the Wikimedia Endowment is to act as a permanent fund that can support in perpetuity the operations and activities of current and future Wikimedia projects, which are projects that are approved by and advance the purposes of the Wikimedia Foundation or its successor if the Wikimedia Foundation ceases to exist. It aims to create a solid financial foundation for the future of Wikimedia projects.	MissionDesc
Significant New Program Srvc	false	SignificantNewProgramSrvcInd
Significant Change	false	SignificantChangeInd
Expense	$3,107,755	ExpenseAmt
Grant	$2,878,345	GrantAmt
Desc	The Wikimedia Endowment provides funding to support the operations and activities of Wikimedia projects. In fiscal year 2023-2024, the funding focused on providing financial support for technical innovation in the Wikimedia projects.	Desc
Total Program Service Expenses	$3,107,755	TotalProgramServiceExpensesAmt
Described In Section501c3	Yes (true)	DescribedInSection501c3Ind
Schedule B Required	Yes (true)	ScheduleBRequiredInd
Political Campaign Acty	false	PoliticalCampaignActyInd
Lobbying Activities	false	LobbyingActivitiesInd
Donor Advised Fund	false	DonorAdvisedFundInd
Conservation Easements	false	ConservationEasementsInd
Collections Of Art	false	CollectionsOfArtInd
Credit Counseling	false	CreditCounselingInd
Donor Rstr Or Quasi Endowments	Yes (true)	DonorRstrOrQuasiEndowmentsInd
Report Land Building Equipment	false	ReportLandBuildingEquipmentInd
Report Investments Other Sec	false	ReportInvestmentsOtherSecInd
Report Program Related Invst	false	ReportProgramRelatedInvstInd
Report Other Assets	false	ReportOtherAssetsInd
Report Other Liabilities	false	ReportOtherLiabilitiesInd
Include FIN48 Footnote	Yes (true)	IncludeFIN48FootnoteInd
Independent Audit Fincl Stmt	Yes (true)	IndependentAuditFinclStmtInd
Consolidated Audit Fincl Stmt	false	ConsolidatedAuditFinclStmtInd
School Operating	false	SchoolOperatingInd
Foreign Office	false	ForeignOfficeInd
Foreign Activities	Yes (true)	ForeignActivitiesInd
More Than5000 K To Org	Yes (true)	MoreThan5000KToOrgInd
More Than5000 K To Individuals	false	MoreThan5000KToIndividualsInd
Professional Fundraising	false	ProfessionalFundraisingInd
Fundraising Activities	false	FundraisingActivitiesInd
Gaming Activities	false	GamingActivitiesInd
Operate Hospital	false	OperateHospitalInd
Grants To Organizations	Yes (true)	GrantsToOrganizationsInd
Grants To Individuals	false	GrantsToIndividualsInd
Schedule J Required	false	ScheduleJRequiredInd
Tax Exempt Bonds	false	TaxExemptBondsInd
Engaged In Excess Benefit Trans	false	EngagedInExcessBenefitTransInd
PY Excess Benefit Trans	false	PYExcessBenefitTransInd
Loan Outstanding	false	LoanOutstandingInd
Grant To Related Person	false	GrantToRelatedPersonInd
Business Rln With Org Mem	false	BusinessRlnWithOrgMemInd
Business Rln With Fam Mem	false	BusinessRlnWithFamMemInd
Business Rln With35 Ctrl Ent	false	BusinessRlnWith35CtrlEntInd
Deductible Non Cash Contri	Yes (true)	DeductibleNonCashContriInd
Deductible Art Contribution	false	DeductibleArtContributionInd
Terminate Operations	false	TerminateOperationsInd
Partial Liquidation	false	PartialLiquidationInd
Disregarded Entity	false	DisregardedEntityInd
Related Entity	false	RelatedEntityInd
Related Organization Ctrl Ent	false	RelatedOrganizationCtrlEntInd
Trnsfr Exmpt Non Chrtbl Rltd Org	false	TrnsfrExmptNonChrtblRltdOrgInd
Activities Conducted Prtshp	false	ActivitiesConductedPrtshpInd
Schedule O Required	Yes (true)	ScheduleORequiredInd
IRP Document	0	IRPDocumentCnt
IRP Document W2 G	0	IRPDocumentW2GCnt
Employee	0	EmployeeCnt
Unrelated Bus Incm Over Limit	false	UnrelatedBusIncmOverLimitInd
Foreign Financial Account	false	ForeignFinancialAccountInd
Prohibited Tax Shelter Trans	false	ProhibitedTaxShelterTransInd
Taxable Party Notification	false	TaxablePartyNotificationInd
Nondeductible Contributions	false	NondeductibleContributionsInd
Quid Pro Quo Contributions	false	QuidProQuoContributionsInd
Form8282 Property Disposed Of	false	Form8282PropertyDisposedOfInd
Rcv Fnds To Pay Prsnl Bnft Cntrct	false	RcvFndsToPayPrsnlBnftCntrctInd
Pay Premiums Prsnl Bnft Cntrct	false	PayPremiumsPrsnlBnftCntrctInd
Indoor Tanning Services	false	IndoorTanningServicesInd
Subj To Tax Rmnrtn Ex Prcht Pymt	false	SubjToTaxRmnrtnExPrchtPymtInd
Subject To Excs Tax Net Invst Inc	false	SubjectToExcsTaxNetInvstIncInd
Info In Schedule O Part VI	Yes (X)	InfoInScheduleOPartVIInd
Governing Body Voting Members	11	GoverningBodyVotingMembersCnt
Independent Voting Member	11	IndependentVotingMemberCnt
Family Or Business Rln	false	FamilyOrBusinessRlnInd
Delegation Of Mgmt Duties	Yes (true)	DelegationOfMgmtDutiesInd
Change To Org Documents	false	ChangeToOrgDocumentsInd
Material Diversion Or Misuse	false	MaterialDiversionOrMisuseInd
Members Or Stockholders	false	MembersOrStockholdersInd
Election Of Board Members	false	ElectionOfBoardMembersInd
Decisions Subject To Approva	false	DecisionsSubjectToApprovaInd
Minutes Of Governing Body	Yes (true)	MinutesOfGoverningBodyInd
Minutes Of Committees	false	MinutesOfCommitteesInd
Officer Mailing Address	false	OfficerMailingAddressInd
Local Chapters	false	LocalChaptersInd
Form990 Provided To Gvrn Body	Yes (true)	Form990ProvidedToGvrnBodyInd
Conflict Of Interest Policy	Yes (true)	ConflictOfInterestPolicyInd
Annual Disclosure Covered Prsn	Yes (true)	AnnualDisclosureCoveredPrsnInd
Regular Monitoring Enfrc	Yes (true)	RegularMonitoringEnfrcInd
Whistleblower Policy	Yes (true)	WhistleblowerPolicyInd
Document Retention Policy	Yes (true)	DocumentRetentionPolicyInd
Compensation Process CEO	false	CompensationProcessCEOInd
Compensation Process Other	false	CompensationProcessOtherInd
Investment In Joint Venture	false	InvestmentInJointVentureInd
States Where Copy Of Return Is Fld	CA	StatesWhereCopyOfReturnIsFldCd
States Where Copy Of Return Is Fld	FL	StatesWhereCopyOfReturnIsFldCd
States Where Copy Of Return Is Fld	GA	StatesWhereCopyOfReturnIsFldCd
States Where Copy Of Return Is Fld	AL	StatesWhereCopyOfReturnIsFldCd
States Where Copy Of Return Is Fld	HI	StatesWhereCopyOfReturnIsFldCd
States Where Copy Of Return Is Fld	IL	StatesWhereCopyOfReturnIsFldCd
States Where Copy Of Return Is Fld	KS	StatesWhereCopyOfReturnIsFldCd
States Where Copy Of Return Is Fld	KY	StatesWhereCopyOfReturnIsFldCd
States Where Copy Of Return Is Fld	AK	StatesWhereCopyOfReturnIsFldCd
States Where Copy Of Return Is Fld	MD	StatesWhereCopyOfReturnIsFldCd
States Where Copy Of Return Is Fld	MA	StatesWhereCopyOfReturnIsFldCd
States Where Copy Of Return Is Fld	MI	StatesWhereCopyOfReturnIsFldCd
States Where Copy Of Return Is Fld	MN	StatesWhereCopyOfReturnIsFldCd
States Where Copy Of Return Is Fld	MS	StatesWhereCopyOfReturnIsFldCd
States Where Copy Of Return Is Fld	NH	StatesWhereCopyOfReturnIsFldCd
States Where Copy Of Return Is Fld	NJ	StatesWhereCopyOfReturnIsFldCd
States Where Copy Of Return Is Fld	NM	StatesWhereCopyOfReturnIsFldCd
States Where Copy Of Return Is Fld	NY	StatesWhereCopyOfReturnIsFldCd
States Where Copy Of Return Is Fld	NC	StatesWhereCopyOfReturnIsFldCd
States Where Copy Of Return Is Fld	OR	StatesWhereCopyOfReturnIsFldCd
States Where Copy Of Return Is Fld	PA	StatesWhereCopyOfReturnIsFldCd
States Where Copy Of Return Is Fld	RI	StatesWhereCopyOfReturnIsFldCd
States Where Copy Of Return Is Fld	SC	StatesWhereCopyOfReturnIsFldCd
States Where Copy Of Return Is Fld	TN	StatesWhereCopyOfReturnIsFldCd
States Where Copy Of Return Is Fld	UT	StatesWhereCopyOfReturnIsFldCd
States Where Copy Of Return Is Fld	VA	StatesWhereCopyOfReturnIsFldCd
States Where Copy Of Return Is Fld	WV	StatesWhereCopyOfReturnIsFldCd
States Where Copy Of Return Is Fld	WI	StatesWhereCopyOfReturnIsFldCd
Own Website	Yes (X)	OwnWebsiteInd
Upon Request	Yes (X)	UponRequestInd

Books In Care Of Detail BooksInCareOfDetail

Business Name BusinessName

Field	Value	IRS element (for citing)
Business Name Line1	Jaime Villagomez	BusinessNameLine1Txt

Field	Value	IRS element (for citing)
Phone	4158396885	PhoneNum

US Address USAddress

Field	Value	IRS element (for citing)
Address Line1	1 Sansome Street Suite 1895	AddressLine1Txt
City	San Francisco	CityNm
State Abbreviation	CA	StateAbbreviationCd
ZIP	94104	ZIPCd

Field	Value	IRS element (for citing)
No Listed Persons Compensated	Yes (X)	NoListedPersonsCompensatedInd

Form990 Part VII Section A Form990PartVIISectionAGrp (14 entries)

TitleTitleTxt	Average Hours Per WeekAverageHoursPerWeekRt	Individual Trustee Or DirectorIndividualTrusteeOrDirectorInd	OfficerOfficerInd	Reportable Comp From OrgReportableCompFromOrgAmt	Reportable Comp From Rltd OrgReportableCompFromRltdOrgAmt	Other CompensationOtherCompensationAmt
Jimmy Wales
Chair	3.0	Yes (X)	Yes (X)	$0	$0	$0
Alexander M Farman-Farmaian
Director	1.0	Yes (X)		$0	$0	$0
Annette Campbell-White
Director	1.0	Yes (X)		$0	$0	$0
Doron Weber
Director	2.0	Yes (X)		$0	$0	$0
Laura Duchatelet
Director	1.0	Yes (X)		$0	$0	$0
Lisa Lewin
Director	1.0	Yes (X)		$0	$0	$0
Mayree Clark
Director	2.0	Yes (X)		$0	$0	$0
Michael Kim
Director	1.0	Yes (X)		$0	$0	$0
Patricio Lorente
Director	1.0	Yes (X)		$0	$0	$0
Peter Baldwin
Director	1.0	Yes (X)		$0	$0	$0
Phoebe Ayers
Director	2.0	Yes (X)		$0	$0	$0
Dhaval Patel
Treasurer	28.0		Yes (X)	$0	$0	$0
Lisa Seitz
President	12.0		Yes (X)	$0	$0	$0
Stephen Laporte
Secretary	1.0		Yes (X)	$0	$0	$0

Field	Value	IRS element (for citing)
Total Reportable Comp From Org	$0	TotalReportableCompFromOrgAmt
Tot Reportable Comp Rltd Org	$0	TotReportableCompRltdOrgAmt
Total Other Compensation	$0	TotalOtherCompensationAmt
Indiv Rcvd Greater Than100 K	0	IndivRcvdGreaterThan100KCnt
Former Ofcr Employees Listed	false	FormerOfcrEmployeesListedInd
Total Comp Greater Than150 K	false	TotalCompGreaterThan150KInd
Compensation From Other Srcs	false	CompensationFromOtherSrcsInd
Cntrct Rcvd Greater Than100 K	0	CntrctRcvdGreaterThan100KCnt
All Other Contributions	$129,605,799	AllOtherContributionsAmt
Noncash Contributions	$106,313,739	NoncashContributionsAmt
Total Contributions	$129,605,799	TotalContributionsAmt

Total Oth Program Service Rev TotalOthProgramServiceRevGrp

Field	Value	IRS element (for citing)
Total Revenue Column	$0	TotalRevenueColumnAmt
Related Or Exempt Func Income	$0	RelatedOrExemptFuncIncomeAmt
Unrelated Business Revenue	$0	UnrelatedBusinessRevenueAmt
Exclusion	$0	ExclusionAmt

Field	Value	IRS element (for citing)
Total Program Service Revenue	$0	TotalProgramServiceRevenueAmt

Investment Income InvestmentIncomeGrp

Field	Value	IRS element (for citing)
Total Revenue Column	$2,407,022	TotalRevenueColumnAmt
Exclusion	$2,407,022	ExclusionAmt

Rental Income Or Loss RentalIncomeOrLossGrp

Field	Value	IRS element (for citing)
Real	$0	RealAmt
Personal	$0	PersonalAmt

Gross Amount Sales Assets GrossAmountSalesAssetsGrp

Field	Value	IRS element (for citing)
Securities	$2,866,648	SecuritiesAmt

Less Cost Oth Basis Sales Expnss LessCostOthBasisSalesExpnssGrp

Field	Value	IRS element (for citing)
Securities	$2,861,263	SecuritiesAmt

Gain Or Loss GainOrLossGrp

Field	Value	IRS element (for citing)
Securities	$5,385	SecuritiesAmt
Other	$0	OtherAmt

Net Gain Or Loss Investments NetGainOrLossInvestmentsGrp

Field	Value	IRS element (for citing)
Total Revenue Column	$5,385	TotalRevenueColumnAmt
Exclusion	$5,385	ExclusionAmt

Miscellaneous Revenue MiscellaneousRevenueGrp

Field	Value	IRS element (for citing)
Total Revenue Column	$0	TotalRevenueColumnAmt
Related Or Exempt Func Income	$0	RelatedOrExemptFuncIncomeAmt
Unrelated Business Revenue	$0	UnrelatedBusinessRevenueAmt
Exclusion	$0	ExclusionAmt

Field	Value	IRS element (for citing)
Other Revenue Total	$0	OtherRevenueTotalAmt

Total Revenue TotalRevenueGrp

Field	Value	IRS element (for citing)
Total Revenue Column	$132,018,206	TotalRevenueColumnAmt
Related Or Exempt Func Income	$0	RelatedOrExemptFuncIncomeAmt
Unrelated Business Revenue	$0	UnrelatedBusinessRevenueAmt
Exclusion	$2,412,407	ExclusionAmt

Grants To Domestic Orgs GrantsToDomesticOrgsGrp

Field	Value	IRS element (for citing)
Total	$2,600,000	TotalAmt
Program Services	$2,600,000	ProgramServicesAmt

Foreign Grants ForeignGrantsGrp

Field	Value	IRS element (for citing)
Total	$278,345	TotalAmt
Program Services	$278,345	ProgramServicesAmt

Fees For Services Management FeesForServicesManagementGrp

Field	Value	IRS element (for citing)
Total	$1,295,765	TotalAmt
Program Services	$216,905	ProgramServicesAmt
Management And General	$628,950	ManagementAndGeneralAmt
Fundraising	$449,910	FundraisingAmt

Fees For Services Legal FeesForServicesLegalGrp

Field	Value	IRS element (for citing)
Total	$13,970	TotalAmt
Program Services	$2,503	ProgramServicesAmt
Management And General	$1,482	ManagementAndGeneralAmt
Fundraising	$9,985	FundraisingAmt

Fees For Srvc Invst Mgmnt Fees FeesForSrvcInvstMgmntFeesGrp

Field	Value	IRS element (for citing)
Total	$31,590	TotalAmt
Management And General	$31,590	ManagementAndGeneralAmt

Fees For Services Other FeesForServicesOtherGrp

Field	Value	IRS element (for citing)
Total	$135,197	TotalAmt
Program Services	$0	ProgramServicesAmt
Management And General	$5,255	ManagementAndGeneralAmt
Fundraising	$129,942	FundraisingAmt

Office Expenses OfficeExpensesGrp

Field	Value	IRS element (for citing)
Total	$107	TotalAmt
Management And General	$107	ManagementAndGeneralAmt

Travel TravelGrp

Field	Value	IRS element (for citing)
Total	$10,868	TotalAmt
Management And General	$1,116	ManagementAndGeneralAmt
Fundraising	$9,752	FundraisingAmt

Other Expenses OtherExpensesGrp (2 entries)

DescDesc	TotalTotalAmt	FundraisingFundraisingAmt	Program ServicesProgramServicesAmt	Management And GeneralManagementAndGeneralAmt
Donation processing Fee	$551,671	$551,671
Other	$67,504	$19,424	$10,002	$38,078

All Other Expenses AllOtherExpensesGrp

Field	Value	IRS element (for citing)
Total	$0	TotalAmt
Program Services	$0	ProgramServicesAmt
Management And General	$0	ManagementAndGeneralAmt
Fundraising	$0	FundraisingAmt

Total Functional Expenses TotalFunctionalExpensesGrp

Field	Value	IRS element (for citing)
Total	$4,985,017	TotalAmt
Program Services	$3,107,755	ProgramServicesAmt
Management And General	$706,578	ManagementAndGeneralAmt
Fundraising	$1,170,684	FundraisingAmt

Cash Non Interest Bearing CashNonInterestBearingGrp

Field	Value	IRS element (for citing)
EOY	$1,316,644	EOYAmt

Savings And Temp Cash Invst SavingsAndTempCashInvstGrp

Field	Value	IRS element (for citing)
EOY	$18,786,045	EOYAmt

Pledges And Grants Receivable PledgesAndGrantsReceivableGrp

Field	Value	IRS element (for citing)
EOY	$525,607	EOYAmt

Receivables From Officers Etc ReceivablesFromOfficersEtcGrp

Field	Value	IRS element (for citing)
EOY	$0	EOYAmt

Rcvbl From Disqualified Prsn RcvblFromDisqualifiedPrsnGrp

Field	Value	IRS element (for citing)
EOY	$0	EOYAmt

Field	Value	IRS element (for citing)
Land Bldg Equip Cost Or Other Bss	$0	LandBldgEquipCostOrOtherBssAmt
Land Bldg Equip Accum Deprec	$0	LandBldgEquipAccumDeprecAmt

Land Bldg Equip Basis Net LandBldgEquipBasisNetGrp

Field	Value	IRS element (for citing)
EOY	$0	EOYAmt

Investments Pub Traded Sec InvestmentsPubTradedSecGrp

Field	Value	IRS element (for citing)
EOY	$123,441,359	EOYAmt

Investments Other Securities InvestmentsOtherSecuritiesGrp

Field	Value	IRS element (for citing)
BOY	$0	BOYAmt

Investments Program Related InvestmentsProgramRelatedGrp

Field	Value	IRS element (for citing)
BOY	$0	BOYAmt

Other Assets Total OtherAssetsTotalGrp

Field	Value	IRS element (for citing)
BOY	$0	BOYAmt
EOY	$255,967	EOYAmt

Total Assets TotalAssetsGrp

Field	Value	IRS element (for citing)
BOY	$0	BOYAmt
EOY	$144,325,622	EOYAmt

Loans From Officers Directors LoansFromOfficersDirectorsGrp

Field	Value	IRS element (for citing)
EOY	$0	EOYAmt

Other Liabilities OtherLiabilitiesGrp

Field	Value	IRS element (for citing)
BOY	$0	BOYAmt
EOY	$0	EOYAmt

Total Liabilities TotalLiabilitiesGrp

Field	Value	IRS element (for citing)
BOY	$0	BOYAmt
EOY	$0	EOYAmt

Field	Value	IRS element (for citing)
Organization Follows FASB117	Yes (X)	OrganizationFollowsFASB117Ind

No Donor Restriction Net Assets NoDonorRestrictionNetAssetsGrp

Field	Value	IRS element (for citing)
EOY	$46,573	EOYAmt

Donor Restriction Net Assets DonorRestrictionNetAssetsGrp

Field	Value	IRS element (for citing)
EOY	$144,279,049	EOYAmt

Total Net Assets Fund Balance TotalNetAssetsFundBalanceGrp

Field	Value	IRS element (for citing)
BOY	$0	BOYAmt
EOY	$144,325,622	EOYAmt

Tot Liab Net Assets Fund Balance TotLiabNetAssetsFundBalanceGrp

Field	Value	IRS element (for citing)
BOY	$0	BOYAmt
EOY	$144,325,622	EOYAmt

Field	Value	IRS element (for citing)
Reconcilation Revenue Expnss	$127,033,189	ReconcilationRevenueExpnssAmt
Net Unrlzd Gains Losses Invst	$17,292,433	NetUnrlzdGainsLossesInvstAmt
Other Changes In Net Assets	$0	OtherChangesInNetAssetsAmt
Method Of Accounting Accrual	Yes (X)	MethodOfAccountingAccrualInd
Accountant Compile Or Review	false	AccountantCompileOrReviewInd
FS Audited	Yes (true)	FSAuditedInd

FS Audited Basis FSAuditedBasisGrp

Field	Value	IRS element (for citing)
Separate Basis Fincl Stmt	Yes (X)	SeparateBasisFinclStmtInd

Field	Value	IRS element (for citing)
Audit Committee	Yes (true)	AuditCommitteeInd
Federal Grant Audit Required	false	FederalGrantAuditRequiredInd

Schedule A IRS990ScheduleA

Field	Value	IRS element (for citing)
Public Organization170	Yes (X)	PublicOrganization170Ind

Gifts Grants Contri Rcvd170 GiftsGrantsContriRcvd170Grp

Field	Value	IRS element (for citing)
Current Tax Year	$129,605,799	CurrentTaxYearAmt
Total	$129,605,799	TotalAmt

Tax Rev Levied Orgnztnl Bnft170 TaxRevLeviedOrgnztnlBnft170Grp

Field	Value	IRS element (for citing)
Total	$0	TotalAmt

Govt Furn Srvc Fclts Vl170 GovtFurnSrvcFcltsVl170Grp

Field	Value	IRS element (for citing)
Total	$0	TotalAmt

Total Calendar Year170 TotalCalendarYear170Grp

Field	Value	IRS element (for citing)
Current Tax Year Minus4 Years	$0	CurrentTaxYearMinus4YearsAmt
Current Tax Year Minus3 Years	$0	CurrentTaxYearMinus3YearsAmt
Current Tax Year Minus2 Years	$0	CurrentTaxYearMinus2YearsAmt
Current Tax Year Minus1 Year	$0	CurrentTaxYearMinus1YearAmt
Current Tax Year	$129,605,799	CurrentTaxYearAmt
Total	$129,605,799	TotalAmt

Field	Value	IRS element (for citing)
Substantial Contributors Tot	$0	SubstantialContributorsTotAmt
Public Support Total170	$129,605,799	PublicSupportTotal170Amt

Gross Investment Income170 GrossInvestmentIncome170Grp

Field	Value	IRS element (for citing)
Current Tax Year	$2,407,022	CurrentTaxYearAmt
Total	$2,407,022	TotalAmt

Unrelated Business Net Incm170 UnrelatedBusinessNetIncm170Grp

Field	Value	IRS element (for citing)
Total	$0	TotalAmt

Other Income170 OtherIncome170Grp

Field	Value	IRS element (for citing)
Current Tax Year Minus4 Years	$0	CurrentTaxYearMinus4YearsAmt
Current Tax Year Minus3 Years	$0	CurrentTaxYearMinus3YearsAmt
Current Tax Year Minus2 Years	$0	CurrentTaxYearMinus2YearsAmt
Current Tax Year Minus1 Year	$0	CurrentTaxYearMinus1YearAmt
Current Tax Year	$0	CurrentTaxYearAmt
Total	$0	TotalAmt

Field	Value	IRS element (for citing)
Total Support	$132,012,821	TotalSupportAmt
Gross Receipts Rltd Activities	$0	GrossReceiptsRltdActivitiesAmt
First5 Years170	Yes (X)	First5Years170Ind

Schedule B IRS990ScheduleB

Contributor Information ContributorInformationGrp

Field	Value	IRS element (for citing)
Contributor	RESTRICTED	ContributorNum

Contributor Business Name ContributorBusinessName

Field	Value	IRS element (for citing)
Business Name Line1	RESTRICTED	BusinessNameLine1

Contributor US Address ContributorUSAddress

Field	Value	IRS element (for citing)
Address Line1	RESTRICTED	AddressLine1
Address Line2	RESTRICTED	AddressLine2
City	RESTRICTED	City
State	RESTRICTED	State
ZIP Code	RESTRICTED	ZIPCode

Field	Value	IRS element (for citing)
Total Contributions	RESTRICTED	TotalContributionsAmt

Schedule D IRS990ScheduleD

CY Endwmt Fund CYEndwmtFundGrp

Field	Value	IRS element (for citing)
Beginning Year Balance	$0	BeginningYearBalanceAmt
Contributions	$128,901,096	ContributionsAmt
Investment Earnings Or Losses	$19,673,250	InvestmentEarningsOrLossesAmt
Grants Or Scholarships	$2,878,345	GrantsOrScholarshipsAmt
Other Expenditures	$229,410	OtherExpendituresAmt
Administrative Expenses	$1,845,672	AdministrativeExpensesAmt
End Year Balance	$143,620,919	EndYearBalanceAmt

CY Minus1 Yr Endwmt Fund CYMinus1YrEndwmtFundGrp

Field	Value	IRS element (for citing)
Beginning Year Balance	$0	BeginningYearBalanceAmt
End Year Balance	$0	EndYearBalanceAmt

CY Minus2 Yr Endwmt Fund CYMinus2YrEndwmtFundGrp

Field	Value	IRS element (for citing)
Beginning Year Balance	$0	BeginningYearBalanceAmt
End Year Balance	$0	EndYearBalanceAmt

CY Minus3 Yr Endwmt Fund CYMinus3YrEndwmtFundGrp

Field	Value	IRS element (for citing)
Beginning Year Balance	$0	BeginningYearBalanceAmt
End Year Balance	$0	EndYearBalanceAmt

CY Minus4 Yr Endwmt Fund CYMinus4YrEndwmtFundGrp

Field	Value	IRS element (for citing)
End Year Balance	$0	EndYearBalanceAmt

Field	Value	IRS element (for citing)
Board Designated Balance EOY	0.0003	BoardDesignatedBalanceEOYPct
Prmnnt Endowment Balance EOY	0.8975	PrmnntEndowmentBalanceEOYPct
Term Endowment Balance EOY	0.1022	TermEndowmentBalanceEOYPct
Endowments Held Unrelated Org	false	EndowmentsHeldUnrelatedOrgInd
Endowments Held Related Org	false	EndowmentsHeldRelatedOrgInd
Total Liability	$0	TotalLiabilityAmt
Footnote Text	Yes (X)	FootnoteTextInd
Total Rev Etc Audited Fincl Stmt	$149,279,049	TotalRevEtcAuditedFinclStmtAmt
Net Unrealized Gains Invst	$17,292,433	NetUnrealizedGainsInvstAmt
Other Revenue	$0	OtherRevenueAmt
Revenue Not Reported	$17,292,433	RevenueNotReportedAmt
Revenue Subtotal	$131,986,616	RevenueSubtotalAmt
Investment Expenses Not Incld	$31,590	InvestmentExpensesNotIncldAmt
Other Revenues Not Included	$0	OtherRevenuesNotIncludedAmt
Revenue Not Reported Fincl Stmt	$31,590	RevenueNotReportedFinclStmtAmt
Total Revenue Per Form990	$132,018,206	TotalRevenuePerForm990Amt
Tot Expns Etc Audited Fincl Stmt	$4,953,427	TotExpnsEtcAuditedFinclStmtAmt
Other Expenses Included	$0	OtherExpensesIncludedAmt
Expenses Not Reported	$0	ExpensesNotReportedAmt
Expenses Subtotal	$4,953,427	ExpensesSubtotalAmt
Investment Expenses Not Incld2	$31,590	InvestmentExpensesNotIncld2Amt
Other Expenses Not Included	$0	OtherExpensesNotIncludedAmt
Expenses Not Rpt Fincl Stmt	$31,590	ExpensesNotRptFinclStmtAmt
Total Expenses Per Form990	$4,985,017	TotalExpensesPerForm990Amt

Supplemental Information Detail SupplementalInformationDetail (2 entries)

Form And Line ReferenceFormAndLineReferenceDesc	ExplanationExplanationTxt
Schedule D, Part V, Line 4 Intended uses of endowment funds	THE ENDOWMENT'S PURPOSE IS TO SUPPORT THE OPERATIONS AND ACTIVITIES OF THE WIKIMEDIA PROJECTS IN PERPETUITY - IT IS A FUND FOR WHICH THE PRINCIPAL IS NOT INTENDED TO BE SPENT, BUT IS INSTEAD USED TO GENERATE INCOME WHICH CAN THEN BE INVESTED IN THE WIKIMEDIA PROJECTS.
Schedule D, Part X, Line 2 FIN 48 (ASC 740) footnote	THE ENDOWMENT HAS EVALUATED THE FINANCIAL STATEMENT IMPACT OF POSITIONS TAKEN OR EXPECTED TO BE TAKEN IN ITS TAX RETURNS. MANAGEMENT HAS DETERMINED THAT NO TAX LIABILITIES NEED TO BE RECORDED UNDER APPLICABLE ACCOUNTING GUIDANCE.

Schedule F IRS990ScheduleF

Field	Value	IRS element (for citing)
Grant Records Maintained	Yes (true)	GrantRecordsMaintainedInd

Account Activities Outside US AccountActivitiesOutsideUSGrp

Field	Value	IRS element (for citing)
Region	Europe (Including Iceland and Greenland)	RegionTxt
Offices	0	OfficesCnt
Employee	0	EmployeeCnt
Type Of Activities Conducted	Grantmaking	TypeOfActivitiesConductedTxt
Region Total Expenditures	$278,345	RegionTotalExpendituresAmt

Field	Value	IRS element (for citing)
Subtotal Offices	0	SubtotalOfficesCnt
Subtotal Employees	0	SubtotalEmployeesCnt
Continuation Total Office	0	ContinuationTotalOfficeCnt
Continuation Total Employee	0	ContinuationTotalEmployeeCnt
Total Office	0	TotalOfficeCnt
Total Employee	0	TotalEmployeeCnt
Subtotal Spent	$278,345	SubtotalSpentAmt
Continuation Spent	$0	ContinuationSpentAmt
Total Spent	$278,345	TotalSpentAmt

Grants To Org Outside US GrantsToOrgOutsideUSGrp

Field	Value	IRS element (for citing)
Region	Europe (Including Iceland and Greenland)	RegionTxt
Purpose Of Grant	Funding for KIWIX	PurposeOfGrantTxt
Cash Grant	$278,345	CashGrantAmt
Manner Of Cash Disbursement	Wire	MannerOfCashDisbursementTxt
Non Cash Assistance	$0	NonCashAssistanceAmt

Field	Value	IRS element (for citing)
Total501c3 Org	1	Total501c3OrgCnt
Total Other Org	0	TotalOtherOrgCnt
Transfer To Foreign Corp	false	TransferToForeignCorpInd
Interest In Foreign Trust	false	InterestInForeignTrustInd
Foreign Corp Ownership	false	ForeignCorpOwnershipInd
Passive Foreign Investmest Co	false	PassiveForeignInvestmestCoInd
Foreign Partnership	false	ForeignPartnershipInd
Boycott Countries	false	BoycottCountriesInd

Supplemental Information Detail SupplementalInformationDetail (3 entries)

Form And Line ReferenceFormAndLineReferenceDesc	ExplanationExplanationTxt
Schedule F, Part I, Line 2 Procedures for monitoring use of grant funds	THE ENDOWMENT STAFF MEETS WITH THE CHIEF PRODUCT AND TECHNOLOGY OFFICER OF THE WIKIMEDIA FOUNDATION TO DEVELOP A SHORTLIST OF PROJECTS THAT ADDRESS THE FUNDING MISSION OF THE ENDOWMENT (I.E., TECHNICAL INNOVATION). THE SHORTLIST IS THEN PRESENTED TO THE GRANTMAKING AND COMMUNITY COMMITTEE OF THE ENDOWMENT BOARD FOR DISCUSSION AND THEIR ENDORSEMENT OF WHICH PROJECTS TO BRING BEFORE A VOTE OF THE FULL ENDOWMENT BOARD. THOSE PROJECTS ARE THEN PRESENTED TO THE BOARD FOR DISCUSSION, AND THE BOARD VOTES TO APPROVE. WHEN AN APPLICANT IS AWARDED FUNDS, THE RECIPIENT COMPLETES ADDITIONAL SCREENING REQUIREMENTS AND SIGNS AN AGREEMENT. THE AGREEMENT STIPULATES THAT THEY WILL USE FUNDS FOR CHARITABLE PURPOSES CONSISTENT WITH THE WIKIMEDIA ENDOWMENT'S MISSION AND THE PURPOSES DESCRIBED IN THE AGREEMENT; THAT THEY AGREE TO THE REPORTING REQUIREMENTS, INCLUDING MAINTAINING RECEIPTS/DOCUMENTATION OF EXPENSES; THAT THEY AGREE TO PROCEDURES FOR NOTIFYING THE WIKIMEDIA ENDOWMENT OF IMPORTANT CHANGES THAT MAY AFFECT THE AGREEMENT; AND THAT THEY WILL NOTIFY THE WIKIMEDIA ENDOWMENT OF ANY UNSPENT FUNDS SO THAT THE RECIPIENT AND WIKIMEDIA ENDOWMENT CAN AGREE TO AN ALTERNATIVE SCHEDULE OR PURPOSE FOR THE USE OF FUNDS. ONCE EACH AGREEMENT IS COMPLETE, THE RECIPIENT MAY BE REQUIRED TO SUBMIT A NARRATIVE AND FINANCIAL REPORT OR SERIES OF REPORTS THAT DEMONSTRATE HOW THE FUNDS WERE SPENT AND DESCRIBE THE IMPACT OF THE WORK.
Schedule F, Part I, Line 3 Method used to account for expenditures on org's financial statements	EUROPE (INCLUDING ICELAND AND GREENLAND)-Accrual
Schedule F, Part II, Line 1 Method used to account for expenditures on org's financial statements	EUROPE (INCLUDING ICELAND AND GREENLAND)-Accrual

Schedule I IRS990ScheduleI

Field	Value	IRS element (for citing)
Grant Records Maintained	Yes (true)	GrantRecordsMaintainedInd

Recipient Table RecipientTable

Recipient Business Name RecipientBusinessName

Field	Value	IRS element (for citing)
Business Name Line1	Wikimedia Foundation	BusinessNameLine1Txt

US Address USAddress

Field	Value	IRS element (for citing)
Address Line1	1 Sansome Ste 1895	AddressLine1Txt
City	San Francisco	CityNm
State Abbreviation	CA	StateAbbreviationCd
ZIP	94104	ZIPCd

Field	Value	IRS element (for citing)
Recipient EIN	200049703	RecipientEIN
IRC Section	501(c)(3)	IRCSectionDesc
Cash Grant	$2,600,000	CashGrantAmt
Purpose Of Grant	For mediawiki improvements, abstract wikipedia, and exploring strategies for expanding beyond existing audiences.	PurposeOfGrantTxt

Field	Value	IRS element (for citing)
Total501c3 Org	1	Total501c3OrgCnt

Supplemental Information Detail SupplementalInformationDetail

Field	Value	IRS element (for citing)
Form And Line Reference	Schedule I, Part I, Line 2 Procedures for monitoring use of grant funds	FormAndLineReferenceDesc
Explanation	THE ENDOWMENT PRESIDENT MEETS WITH THE CHIEF PRODUCT AND TECHNOLOGY OFFICER OF THE WIKIMEDIA FOUNDATION TO DEVELOP A SHORTLIST OF PROJECTS THAT ADDRESS THE FUNDING MISSION OF THE ENDOWMENT (I.E., TECHNICAL INNOVATION). THE SHORTLIST IS THEN PRESENTED TO THE GRANTMAKING AND COMMUNITY COMMITTEE OF THE ENDOWMENT BOARD FOR DISCUSSION AND THEIR ENDORSEMENT OF WHICH PROJECTS TO BRING BEFORE A VOTE OF THE FULL ENDOWMENT BOARD. THOSE PROJECTS ARE THEN PRESENTED TO THE BOARD FOR DISCUSSION, AND THE BOARD VOTES TO APPROVE. WHEN AN APPLICANT IS AWARDED FUNDS, THE RECIPIENT COMPLETES ADDITIONAL SCREENING REQUIREMENTS AND SIGNS AN AGREEMENT. THE AGREEMENT STIPULATES THAT THEY WILL USE FUNDS FOR CHARITABLE PURPOSES CONSISTENT WITH THE WIKIMEDIA ENDOWMENT'S MISSION AND THE PURPOSES DESCRIBED IN THE AGREEMENT; THAT THEY AGREE TO THE REPORTING REQUIREMENTS, INCLUDING MAINTAINING RECEIPTS/DOCUMENTATION OF EXPENSES; THAT THEY AGREE TO PROCEDURES FOR NOTIFYING THE WIKIMEDIA ENDOWMENT OF IMPORTANT CHANGES THAT MAY AFFECT THE AGREEMENT; AND THAT THEY WILL NOTIFY THE WIKIMEDIA ENDOWMENT OF ANY UNSPENT FUNDS SO THAT THE RECIPIENT AND WIKIMEDIA ENDOWMENT CAN AGREE TO AN ALTERNATIVE SCHEDULE OR PURPOSE FOR THE USE OF FUNDS. ONCE EACH AGREEMENT IS COMPLETE, THE RECIPIENT MAY BE REQUIRED TO SUBMIT A NARRATIVE AND FINANCIAL REPORT OR SERIES OF REPORTS THAT DEMONSTRATE HOW THE FUNDS WERE SPENT AND DESCRIBE THE IMPACT OF THE WORK. METHOD OF ACCOUNTING: THE GRANTS AND EXPENDITURES REPORTED IN SCHEDULE I WERE BASED ON THE ACCRUAL METHOD OF ACCOUNTING.	ExplanationTxt

Schedule M IRS990ScheduleM

Securities Publicly Traded SecuritiesPubliclyTradedGrp

Field	Value	IRS element (for citing)
Non Cash Checkbox	Yes (X)	NonCashCheckboxInd
Contribution	16	ContributionCnt
Noncash Contributions Rpt F990	$106,313,739	NoncashContributionsRptF990Amt
Method Of Determining Revenues	Market value	MethodOfDeterminingRevenuesTxt

Field	Value	IRS element (for citing)
Any Property That Must Be Held	false	AnyPropertyThatMustBeHeldInd
Review Process Unusual NC Gifts	Yes (true)	ReviewProcessUnusualNCGiftsInd
Third Parties Used	false	ThirdPartiesUsedInd

Schedule O IRS990ScheduleO

Supplemental Information Detail SupplementalInformationDetail (7 entries)

Form And Line ReferenceFormAndLineReferenceDesc	ExplanationExplanationTxt
Form 990, Part VI, Line 3 Delegation of management duties	The Wikimedia Foundation plans and executes the budget and financial operations of the Endowment, as well as supervises exempt operations. Dhaval Patel and Lisa Seitz are officers of the Endowment and were compensated by the Wikimedia Foundation during the 2023 calendar year. The Endowment reimburses the Wikimedia Foundation under a cost-sharing agreement. The amounts of reportable compensation received for services provided to the Endowment are: Dhaval Patel: $161,362 Lisa Seitz: $66,095
Form 990, Part VI, Line 8b Documentation of meetings held by committees of governing body	Minutes were not taken at committee meetings during this fiscal year; however minutes are now taken at committee meetings as of fiscal year 2025-2026.
Form 990, Part VI, Line 11b Review of form 990 by governing body	The first draft of the 990 was developed by an external accounting firm under the direction of the Wikimedia Foundation Controller with additional guidance from the Chief Financial Officer (CFO). It was revised for accuracy and completeness by the CFO and the Endowment Treasurer. Then a meeting of the Endowment Audit Committee was held at which the Treasurer and external accounting firm walked through the draft in detail for the Audit Committee's approval. The Endowment provided the members of the governing body 7 days notice to review the complete copy of the Form 990 prior to filing with the Internal Revenue Service.
Form 990, Part VI, Line 12c Conflict of interest policy	The organization's board members, officers, executives, and key employees (covered persons) complete annually a conflict of interest statement the purpose of which is to identify any personal, family and/or business relationships and/or transactions that may pose a potential conflict. The filed conflict of interest forms are submitted to and reviewed by the board or a committee of the board. Additionally, covered persons complete annually a pledge of personal commitment that affirms that the individual is in compliance with the conflict of interest policy and that the individual will promptly notify the board when a conflict or potential conflict arises. Furthermore, in the case of a conflict, the individual agrees to refrain from using his or her personal influence to encourage the Wikimedia Endowment to enter the transaction and must physically excuse himself or herself from any further discussions other than to answer questions about the transaction. In the case of potential conflict, the remaining board members review the potential transaction to determine whether said transaction is fair and reasonable to the Wikimedia Endowment.
Form 990, Part VI, Line 19 Required documents available to the public	The audited financial statements are available on the Endowment's website: https://wikimediaendowment.org/#reports. The governing documents and conflict of interest policy are available at the Endowment's section on the Wikimedia Foundation website: https://foundation.wikimedia.org/wiki/endowment
Form 990, Part VII, Section A, Line 1a, Column (D) Form 990, Part VII	The endowment does not have any employees of its own and does not pay compensation to any staff. The staff who support the endowment are paid by the Wikimedia Foundation, and the endowment pays the Wikimedia Foundation for their services.
Form 990, Line B Amended Return	The return is amended to correct the following: - Part IV, Line 10 was updated to 'Yes' along with the required information completed on Schedule D, Part V. - Part VI, Section A, Line 3 was updated to 'Yes' with an explanation in Schedule O. - Part VI, Section A, Line 8b was updated to 'No' with an explanation in Schedule O. - Part X, Lines 27 and 28 were updated to report net assets with donor restrictions.