HOWARD HUGHES MEDICAL INSTITUTE: Form 990, tax year 2017

View the entire original 990 at ProPublica ↗

Organization: HOWARD HUGHES MEDICAL INSTITUTE (EIN 59-0735717)
Tax period: 2017-09-01 to 2018-08-31
Filed: 2019-03-20
IRS object ID: 201900799349300435
Schema version: 2017v2.2
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 C
Schedule D
Schedule F
Schedule I
Schedule J
Schedule K
Schedule K
Schedule L
Schedule O
Schedule R

Return header ReturnHeader

Field	Value	IRS element (for citing)
Return	2019-03-20T16:00:14-05:00	ReturnTs
Tax Period End	2018-08-31	TaxPeriodEndDt

Preparer Firm PreparerFirmGrp

Field	Value	IRS element (for citing)
Preparer Firm EIN	134008324	PreparerFirmEIN

Preparer Firm Name PreparerFirmName

Field	Value	IRS element (for citing)
Business Name Line1	PRICEWATERHOUSECOOPERS LLC	BusinessNameLine1Txt

Preparer US Address PreparerUSAddress

Field	Value	IRS element (for citing)
Address Line1	600 13th Street NW Ste 1000	AddressLine1Txt
City	Washington	CityNm
State Abbreviation	DC	StateAbbreviationCd
ZIP	20005	ZIPCd

Field	Value	IRS element (for citing)
Return Type	990	ReturnTypeCd
Tax Period Begin	2017-09-01	TaxPeriodBeginDt

Filer Filer

Field	Value	IRS element (for citing)
EIN	590735717	EIN

Business Name BusinessName

Field	Value	IRS element (for citing)
Business Name Line1	Howard Hughes Medical Institute	BusinessNameLine1Txt

Field	Value	IRS element (for citing)
Business Name Control	HOWA	BusinessNameControlTxt
Phone	3012158500	PhoneNum

US Address USAddress

Field	Value	IRS element (for citing)
Address Line1	4000 JONES BRIDGE ROAD	AddressLine1Txt
City	CHEVY CHASE	CityNm
State Abbreviation	MD	StateAbbreviationCd
ZIP	20815	ZIPCd

Business Officer BusinessOfficerGrp

Field	Value	IRS element (for citing)
Person	Monique L Marcus	PersonNm
Person Title	Controller	PersonTitleTxt
Signature	2019-03-20	SignatureDt
Discuss With Paid Preparer	Yes (true)	DiscussWithPaidPreparerInd

Preparer Person PreparerPersonGrp

Field	Value	IRS element (for citing)
Preparer Person	Michelle Michalowski	PreparerPersonNm
PTIN	P00755304	PTIN
Phone	2024141000	PhoneNum

Field	Value	IRS element (for citing)
Tax	2017	TaxYr
Build TS	2019-02-21 02:37:17Z	BuildTS

Form 990 IRS990

US Address USAddress

Field	Value	IRS element (for citing)
Address Line1	4000 JONES BRIDGE ROAD	AddressLine1Txt
City	CHEVY CHASE	CityNm
State Abbreviation	MD	StateAbbreviationCd
ZIP	20815	ZIPCd

Field	Value	IRS element (for citing)
Gross Receipts	$79,457,064,865	GrossReceiptsAmt
Group Return For Affiliates	false	GroupReturnForAffiliatesInd
Organization501c3	Yes (X)	Organization501c3Ind
Website Address	WWW.HHMI.ORG	WebsiteAddressTxt
Type Of Organization Corp	Yes (X)	TypeOfOrganizationCorpInd
Formation	1953	FormationYr
Legal Domicile State	DE	LegalDomicileStateCd
Activity Or Mission	THE HOWARD HUGHES MEDICAL INSTITUTE IS A PHILANTHROPY THAT SERVES SOCIETY THROUGH THE DIRECT CONDUCT OF BIOMEDICAL RESEARCH AND SUPPORT FOR PROGRAMS IN SCIENCE EDUCATION.	ActivityOrMissionDesc
Voting Members Governing Body	10	VotingMembersGoverningBodyCnt
Voting Members Independent	10	VotingMembersIndependentCnt
Total Employee	3161	TotalEmployeeCnt
Total Gross UBI	$21,310,474	TotalGrossUBIAmt
Net Unrelated Bus Txbl Incm	$0	NetUnrelatedBusTxblIncmAmt
PY Contributions Grants	$961,418	PYContributionsGrantsAmt
CY Contributions Grants	$3,169,402	CYContributionsGrantsAmt
PY Program Service Revenue	$2,593,242	PYProgramServiceRevenueAmt
CY Program Service Revenue	$2,780,883	CYProgramServiceRevenueAmt
PY Investment Income	$1,525,605,714	PYInvestmentIncomeAmt
CY Investment Income	$1,506,668,026	CYInvestmentIncomeAmt
PY Other Revenue	$21,387,517	PYOtherRevenueAmt
CY Other Revenue	$14,706,006	CYOtherRevenueAmt
PY Total Revenue	$1,550,547,891	PYTotalRevenueAmt
CY Total Revenue	$1,527,324,317	CYTotalRevenueAmt
PY Grants And Similar Paid	$94,758,743	PYGrantsAndSimilarPaidAmt
CY Grants And Similar Paid	$75,764,031	CYGrantsAndSimilarPaidAmt
CY Benefits Paid To Members	$0	CYBenefitsPaidToMembersAmt
PY Salaries Comp Emp Bnft Paid	$405,021,233	PYSalariesCompEmpBnftPaidAmt
CY Salaries Comp Emp Bnft Paid	$310,043,783	CYSalariesCompEmpBnftPaidAmt
CY Total Prof Fndrsng Expns	$0	CYTotalProfFndrsngExpnsAmt
CY Total Fundraising Expense	$0	CYTotalFundraisingExpenseAmt
PY Other Expenses	$543,673,945	PYOtherExpensesAmt
CY Other Expenses	$539,910,899	CYOtherExpensesAmt
PY Total Expenses	$1,043,453,921	PYTotalExpensesAmt
CY Total Expenses	$925,718,713	CYTotalExpensesAmt
PY Revenues Less Expenses	$507,093,970	PYRevenuesLessExpensesAmt
CY Revenues Less Expenses	$601,605,604	CYRevenuesLessExpensesAmt
Total Assets BOY	$22,594,415,758	TotalAssetsBOYAmt
Total Assets EOY	$23,816,259,445	TotalAssetsEOYAmt
Total Liabilities BOY	$3,285,217,733	TotalLiabilitiesBOYAmt
Total Liabilities EOY	$3,446,900,214	TotalLiabilitiesEOYAmt
Net Assets Or Fund Balances BOY	$19,309,198,025	NetAssetsOrFundBalancesBOYAmt
Net Assets Or Fund Balances EOY	$20,369,359,231	NetAssetsOrFundBalancesEOYAmt
Mission	THE HOWARD HUGHES MEDICAL INSTITUTE ("INSTITUTE" OR "HHMI") IS THE NATION'S LARGEST PRIVATE BIOMEDICAL RESEARCH INSTITUTION, WITH ALMOST $21 BILLION IN NET ASSETS AT THE END OF ITS 2018 FISCAL YEAR. THE MISSION OF THE INSTITUTE HAS REMAINED CONSTANT SINCE ITS FOUNDING IN 1953. AS ITS RESTATED ARTICLES OF INCORPORATION STATE "THE PRIMARY PURPOSE AND OBJECTIVE OF THE HOWARD HUGHES MEDICAL INSTITUTE SHALL BE THE PROMOTION OF HUMAN KNOWLEDGE BY CONDUCTING DISCOVERY RESEARCH AND SCIENCE EDUCATION, PRINCIPALLY WITHIN FIELDS ASSOCIATED WITH BASIC BIOMEDICAL SCIENCES, AND THE DISSEMINATION AND APPLICATION OF THAT KNOWLEDGE FOR THE BENEFIT OF HUMANITY."	MissionDesc
Significant New Program Srvc	false	SignificantNewProgramSrvcInd
Significant Change	false	SignificantChangeInd
Expense	$553,725,225	ExpenseAmt
Revenue	$2,680,024	RevenueAmt
Desc	MEDICAL RESEARCH ORGANIZATION ACTIVITIES (A) THE HHMI INVESTIGATOR PROGRAM (B) JANELIA RESEARCH CAMPUS (A) The HHMI Investigator Program The Howard Hughes Medical Institute's approach to biomedical research can be summarized in three words: people, not projects. By employing scientists as HHMI investigators - rather than awarding research grants - the Institute provides long-term, flexible funding that enables its researchers to pursue their scientific interests wherever they lead. HHMI believes that scientists of exceptional talent and imagination will make fundamental discoveries of lasting scientific value and benefit to humanity if they are given the resources, time, and freedom to pursue challenging questions. The Institute nurtures the creativity and intellectual daring of scientists who are willing to set aside conventional wisdom or the "easy" question for a fundamental problem that may take many years to solve. Among the characteristics that distinguish this group of scientists are qualities such as creativity, a penchant for risk-taking, and a commitment to discovery, productivity, and perseverance. This unique research model is an imaginative and powerful alternative to funding biomedical research through grants. The HHMI Investigator Program employs more than 280 HHMI researchers, among them 15 Nobel laureates and more than 170 members of the National Academy of Sciences. HHMI investigators direct Institute research laboratories on the campuses of 58 universities and other research organizations throughout the United States. Since the early 1990s, investigators have been selected through rigorous national competitions. The Institute solicits applications directly from scientists at medical schools and other research institutions in the United States, with the aim of identifying those who have the potential to make significant contributions to science. HHMI employs an open application process to ensure that it is selecting its researchers from a broad and deep pool of scientific talent. In May 2018, HHMI announced that it selected 19 new HHMI investigators through a national open competition. Each of the 19 new investigators will receive roughly $8 million over a seven-year term, which is renewable pending a scientific review. In addition, investigator support includes a guaranteed two-year transition period. This new group of investigators is the first to be appointed to a seven-year term (previous terms lasted five years). HHMI selected the new investigators from a pool of 675 eligible applicants. (B) Janelia Research Campus HHMI's Janelia Research Campus in Ashburn, Virginia, helps open scientific fields by breaking through technical and intellectual barriers. At Janelia, integrated teams of lab scientists and tool-builders pursue a small number of scientific questions with potential for transformative impact. To drive science forward, methods, results, and tools are shared with the scientific community. In late 2017, Janelia moved to a 15-year research model. Under this new model, Janelia plans to develop a given research area for roughly 15 years to gain traction and attract outside interest, at which point it will cycle to a new area of focus. This approach enables Janelia to stay at the frontier of science, advancing 1-3 research areas at any point in time. The first new research area leverages and transforms Janelia's program on neural circuits and behavior, allowing scientists to pursue one of the biggest questions in brain science. Researchers in mechanistic cognitive neuroscience ask how the brain enables cognition. Additional research areas will be decided through open, international competitions. In July 2018, HHMI announced a search for Janelia's next Executive Director. In the current fiscal year, there were 36 group leaders, five fellows and 17 senior fellows at Janelia, in addition to graduate students, other scientific trainees, and visiting scientists. Janelia also operates a vibrant scientific conference program, bringing many scientists to its campus each year for educational meetings.	Desc

Prog Srvc Accom Acty2 ProgSrvcAccomActy2Grp

Field	Value	IRS element (for citing)
Expense	$106,526,587	ExpenseAmt
Grant	$75,764,031	GrantAmt
Revenue	$100,859	RevenueAmt
Desc	SCIENCE EDUCATION AND RESEARCH GRANT PROGRAMS (A) SCIENCE EDUCATION GRANT AND RESEARCH PROGRAMS (B) EDUCATIONAL MEDIA (C) TANGLED BANK STUDIOS (D) HANNA H GRAY FELLOWS (E) FACULTY SCHOLARS (F) E-LIFE OPEN ACCESS JOURNAL (CONTINUED ON SCHEDULE O)	Desc

Prog Srvc Accom Acty3 ProgSrvcAccomActy3Grp

Field	Value	IRS element (for citing)
Expense	$30,369	ExpenseAmt
Desc	SUPPORT FOR INTERNATIONAL SCIENCE 4c: Support for International Science HHMI continues to support forty-one scientists from 16 countries who were selected in 2017 as International Research Scholars, exceptional early-career scientists poised to advance biomedical research across the globe. HHMI teamed up with the Bill & Melinda Gates Foundation, the Wellcome Trust, and the Calouste Gulbenkian Foundation to develop scientific talent around the world, and with these partners awarded a total of over $29.3 million to this group of scholars. Each researcher will receive a five-year award of $715,000, including indirect costs. The award is a major boost for scientists early in their careers, and offers the freedom to pursue new research directions and creative projects that could develop into top-notch scientific programs. Africa Health Research Institute in South Africa In 2009, HHMI helped launch the KwaZulu-Natal Research Institute for TB-HIV (K-RITH) in collaboration with the University of KwaZulu-Natal (UKZN), and has provided significant funding to support its research efforts. In 2016, in a move to improve the health of people locally and globally, K-RITH joined forces with the Africa Centre for Population Health to form a groundbreaking new interdisciplinary institute to fight tuberculosis (TB), HIV and related diseases. The new organization, the Africa Health Research Institute (AHRI), is located at the heart of South Africa's TB and HIV co-epidemic in KwaZulu-Natal Province. The effort brings together the Africa Centre's detailed population data from over 100,000 participants, with K-RITH's expertise in basic science and its world-class laboratory facilities. HHMI, together with the Wellcome Trust, continues to provide grant support to AHRI, with the University College London and UKZN serving as significant academic partners. AHRI is committed to working towards the elimination of HIV and TB. To achieve this, the institute brings together leading researchers from different fields, uses cutting-edge science to improve people's health, and helps train the next generation of African scientists.	Desc

Field	Value	IRS element (for citing)
Total Program Service Expenses	$660,282,181	TotalProgramServiceExpensesAmt
Described In Section501c3	Yes (true)	DescribedInSection501c3Ind
Schedule B Required	Yes (true)	ScheduleBRequiredInd
Political Campaign Acty	false	PoliticalCampaignActyInd
Lobbying Activities	Yes (true)	LobbyingActivitiesInd
Donor Advised Fund	false	DonorAdvisedFundInd
Conservation Easements	false	ConservationEasementsInd
Collections Of Art	false	CollectionsOfArtInd
Credit Counseling	false	CreditCounselingInd
Temp Or Permanent Endowments	false	TempOrPermanentEndowmentsInd
Report Land Building Equipment	Yes (true)	ReportLandBuildingEquipmentInd
Report Investments Other Sec	Yes (true)	ReportInvestmentsOtherSecInd
Report Program Related Invst	false	ReportProgramRelatedInvstInd
Report Other Assets	false	ReportOtherAssetsInd
Report Other Liabilities	Yes (true)	ReportOtherLiabilitiesInd
Include FIN48 Footnote	false	IncludeFIN48FootnoteInd
Independent Audit Fincl Stmt	false	IndependentAuditFinclStmtInd
Consolidated Audit Fincl Stmt	Yes (true)	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	Yes (true)	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	Yes (true)	GrantsToIndividualsInd
Schedule J Required	Yes (true)	ScheduleJRequiredInd
Tax Exempt Bonds	Yes (true)	TaxExemptBondsInd
Invest Tax Exempt Bonds	false	InvestTaxExemptBondsInd
Escrow Account	false	EscrowAccountInd
On Behalf Of Issuer	false	OnBehalfOfIssuerInd
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	Yes (true)	BusinessRlnWithFamMemInd
Business Rln With Officer Ent	false	BusinessRlnWithOfficerEntInd
Deductible Non Cash Contri	false	DeductibleNonCashContriInd
Deductible Art Contribution	false	DeductibleArtContributionInd
Terminate Operations	false	TerminateOperationsInd
Partial Liquidation	false	PartialLiquidationInd
Disregarded Entity	Yes (true)	DisregardedEntityInd
Related Entity	Yes (true)	RelatedEntityInd
Related Organization Ctrl Ent	Yes (true)	RelatedOrganizationCtrlEntInd
Transaction With Control Ent	Yes (true)	TransactionWithControlEntInd
Trnsfr Exmpt Non Chrtbl Rltd Org	false	TrnsfrExmptNonChrtblRltdOrgInd
Activities Conducted Prtshp	false	ActivitiesConductedPrtshpInd
Schedule O Required	Yes (true)	ScheduleORequiredInd
IRP Document	800	IRPDocumentCnt
IRP Document W2 G	0	IRPDocumentW2GCnt
Backup Wthld Compliance	Yes (true)	BackupWthldComplianceInd
Employee	3161	EmployeeCnt
Employment Tax Returns Filed	Yes (true)	EmploymentTaxReturnsFiledInd
Unrelated Bus Incm Over Limit	Yes (true)	UnrelatedBusIncmOverLimitInd
Form990 T Filed	Yes (true)	Form990TFiledInd
Foreign Financial Account	Yes (true)	ForeignFinancialAccountInd
Foreign Country	HK	ForeignCountryCd
Foreign Country	IN	ForeignCountryCd
Foreign Country	ID	ForeignCountryCd
Foreign Country	EI	ForeignCountryCd
Foreign Country	IT	ForeignCountryCd
Foreign Country	JA	ForeignCountryCd
Foreign Country	JE	ForeignCountryCd
Foreign Country	KS	ForeignCountryCd
Foreign Country	LU	ForeignCountryCd
Foreign Country	MY	ForeignCountryCd
Foreign Country	MT	ForeignCountryCd
Foreign Country	AS	ForeignCountryCd
Foreign Country	MP	ForeignCountryCd
Foreign Country	MX	ForeignCountryCd
Foreign Country	NL	ForeignCountryCd
Foreign Country	NZ	ForeignCountryCd
Foreign Country	NO	ForeignCountryCd
Foreign Country	RP	ForeignCountryCd
Foreign Country	PL	ForeignCountryCd
Foreign Country	PO	ForeignCountryCd
Foreign Country	SN	ForeignCountryCd
Foreign Country	SF	ForeignCountryCd
Foreign Country	SP	ForeignCountryCd
Foreign Country	SW	ForeignCountryCd
Foreign Country	SZ	ForeignCountryCd
Foreign Country	TW	ForeignCountryCd
Foreign Country	TH	ForeignCountryCd
Foreign Country	TU	ForeignCountryCd
Foreign Country	BE	ForeignCountryCd
Foreign Country	AE	ForeignCountryCd
Foreign Country	UK	ForeignCountryCd
Foreign Country	BD	ForeignCountryCd
Foreign Country	BR	ForeignCountryCd
Foreign Country	VI	ForeignCountryCd
Foreign Country	CA	ForeignCountryCd
Foreign Country	CJ	ForeignCountryCd
Foreign Country	CI	ForeignCountryCd
Foreign Country	CO	ForeignCountryCd
Foreign Country	EZ	ForeignCountryCd
Foreign Country	DA	ForeignCountryCd
Foreign Country	FI	ForeignCountryCd
Foreign Country	FR	ForeignCountryCd
Foreign Country	GM	ForeignCountryCd
Foreign Country	GK	ForeignCountryCd
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	Yes (true)	Form8282PropertyDisposedOfInd
Rcv Fnds To Pay Prsnl Bnft Cntrct	false	RcvFndsToPayPrsnlBnftCntrctInd
Pay Premiums Prsnl Bnft Cntrct	false	PayPremiumsPrsnlBnftCntrctInd
Indoor Tanning Services	false	IndoorTanningServicesInd
Info In Schedule O Part VI	Yes (X)	InfoInScheduleOPartVIInd
Governing Body Voting Members	10	GoverningBodyVotingMembersCnt
Independent Voting Member	10	IndependentVotingMemberCnt
Family Or Business Rln	false	FamilyOrBusinessRlnInd
Delegation Of Mgmt Duties	false	DelegationOfMgmtDutiesInd
Change To Org Documents	Yes (true)	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	Yes (true)	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	Yes (true)	CompensationProcessCEOInd
Compensation Process Other	Yes (true)	CompensationProcessOtherInd
Investment In Joint Venture	false	InvestmentInJointVentureInd
States Where Copy Of Return Is Fld	CA	StatesWhereCopyOfReturnIsFldCd
States Where Copy Of Return Is Fld	IL	StatesWhereCopyOfReturnIsFldCd
States Where Copy Of Return Is Fld	IN	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	NY	StatesWhereCopyOfReturnIsFldCd
States Where Copy Of Return Is Fld	OK	StatesWhereCopyOfReturnIsFldCd
States Where Copy Of Return Is Fld	OR	StatesWhereCopyOfReturnIsFldCd
States Where Copy Of Return Is Fld	AZ	StatesWhereCopyOfReturnIsFldCd
Upon Request	Yes (X)	UponRequestInd

Books In Care Of Detail BooksInCareOfDetail

Business Name BusinessName

Field	Value	IRS element (for citing)
Business Name Line1	MONIQUE L MARCUS	BusinessNameLine1Txt

Field	Value	IRS element (for citing)
Phone	3012158500	PhoneNum

US Address USAddress

Field	Value	IRS element (for citing)
Address Line1	4000 JONES BRIDGE ROAD	AddressLine1Txt
City	CHEVY CHASE	CityNm
State Abbreviation	MD	StateAbbreviationCd
ZIP	20815	ZIPCd

Form990 Part VII Section A Form990PartVIISectionAGrp (34 entries)

TitleTitleTxt	Average Hours Per WeekAverageHoursPerWeekRt	Individual Trustee Or DirectorIndividualTrusteeOrDirectorInd	Reportable Comp From OrgReportableCompFromOrgAmt	Reportable Comp From Rltd OrgReportableCompFromRltdOrgAmt	Other CompensationOtherCompensationAmt	OfficerOfficerInd	Key EmployeeKeyEmployeeInd	Highest Compensated EmployeeHighestCompensatedEmployeeInd	Former Ofcr Director TrusteeFormerOfcrDirectorTrusteeInd
JAMES A BAKER III ESQ
TRUSTEE	2.0	Yes (X)	$40,000	$0	$0
CHARLENE BARSHEFSKY ESQ
TRUSTEE	2.0	Yes (X)	$40,000	$0	$0
JOSEPH L GOLDSTEIN MD
TRUSTEE, CHAIRMAN RESEARCH COMM	4.0	Yes (X)	$52,000	$0	$0
FRED R LUMMIS
TRUSTEE, CHAIRMAN FINANCE COMM	4.0	Yes (X)	$50,000	$0	$0
PAUL M NURSE PHD
TRUSTEE	2.0	Yes (X)	$40,000	$0	$0
ALISON F RICHARD PHD
TRUSTEE, CHAIRMAN EDUCATION COMM	4.0	Yes (X)	$50,000	$0	$0
CLAYTON S ROSE PHD
TRUSTEE, CHAIRMAN AUDIT & COMP	6.0	Yes (X)	$50,000	$0	$0
KURT L SCHMOKE ESQ
TRUSTEE, CHAIRMAN	6.0	Yes (X)	$60,000	$0	$0
DEBORAH L SPAR PHD
TRUSTEE	2.0	Yes (X)	$40,000	$0	$0
ANNE M TATLOCK
TRUSTEE	2.0	Yes (X)	$40,000	$0	$0
BODO STERN PHD
CHIEF DEV ELOPMENT & STRATEGY OFF	40.0		$335,817	$0	$41,066	Yes (X)
STEPHEN JASKO
CFO & TREASURER from 11/17	40.0		$64,554	$0	$3,287	Yes (X)
ERIN K O'SHEA PHD
PRESIDENT	40.0		$996,882	$0	$55,681	Yes (X)
SEAN B CARROLL PHD
VP FOR SCIENCE EDUCATION	40.0		$717,286	$0	$57,972	Yes (X)
DAVID CLAPHAM PHD
VP & CHIEF SCI OFF	40.0		$953,196	$0	$64,119	Yes (X)
HEIDI E HENNING ESQ
VP,GENERAL COUNSEL/SEC	40.0		$622,740	$0	$64,815	Yes (X)
DENNIS MCKEARIN PHD
VP OF OPERATIONS	40.0		$478,122	$0	$59,081	Yes (X)
GERALD M RUBIN PHD
VP&EXEC DIR,JANELIA RES CAMPUS	40.0		$808,767	$0	$123,775	Yes (X)
LANDIS ZIMMERMAN
VP & CHIEF INVESTMENT OFFICER	40.0		$1,083,687	$0	$59,779	Yes (X)
LAUREN T SPILIOTES ESQ
DEP GENCOUNSEL/ASST SEC	40.0		$430,145	$0	$60,268	Yes (X)
SUSAN S PLOTNICK
ASSISTANT TREASURER & DIRECTOR-FINANCE	40.0		$251,287	$0	$60,089	Yes (X)
MONIQUE L MARCUS
CONTROLLER	40.0		$201,705	$0	$52,134	Yes (X)
RICHARD A PENDER
MAN DIR - US EQUITIES	40.0		$539,090	$0	$60,197		Yes (X)
GREGORY DENINNO
MAN DIR - PRIVATE EQUITIES	40.0		$364,699	$0	$51,135		Yes (X)
ROBERT J KOLYER JR
MAN DIR - DIVERSIFIED ASSETS	40.0		$734,769	$0	$57,883		Yes (X)
STEPHEN M KITSOULIS
MAN DIR - FIXED INCOME	40.0		$438,869	$0	$49,666		Yes (X)
THOMAS R CECH PHD
INVESTIGATOR	40.0		$673,120	$0	$61,546			Yes (X)
ERIC R KANDEL MD
SENIOR INVESTIGATOR	40.0		$629,617	$0	$62,926			Yes (X)
RODERICK MACKINNON MD
INVESTIGATOR	40.0		$533,669	$0	$41,082			Yes (X)
RICHARD AXEL MD
INVESTIGATOR	40.0		$520,664	$0	$48,119			Yes (X)
ROBERT TJIAN PHD
INVESTIGATOR	40.0		$572,465	$0	$65,440			Yes (X)
NITIN V KOTAK
FORMER CFO & TREASURER	40.0		$394,114	$0	$35,027				Yes (X)
JOHN PALMISANO
CHIEF OF BUSINESS SOLUTIONS/FORMER VP FOR INFORMATION TECHNOLOGY	40.0		$292,977	$0	$51,289				Yes (X)
KATHY WYSZYNSKI
FORMER VP, HUMAN RESOURCES	40.0		$327,469	$0	$24,165				Yes (X)

Field	Value	IRS element (for citing)
Total Reportable Comp From Org	$13,427,710	TotalReportableCompFromOrgAmt
Tot Reportable Comp Rltd Org	$0	TotReportableCompRltdOrgAmt
Total Other Compensation	$1,310,541	TotalOtherCompensationAmt
Indiv Rcvd Greater Than100 K	719	IndivRcvdGreaterThan100KCnt
Former Ofcr Employees Listed	Yes (true)	FormerOfcrEmployeesListedInd
Total Comp Greater Than150 K	Yes (true)	TotalCompGreaterThan150KInd
Compensation From Other Srcs	false	CompensationFromOtherSrcsInd

Contractor Compensation ContractorCompensationGrp (5 entries)

Address Line1ContractorAddress/USAddress/AddressLine1Txt	CityContractorAddress/USAddress/CityNm	State AbbreviationContractorAddress/USAddress/StateAbbreviationCd	ZIPContractorAddress/USAddress/ZIPCd	ServicesServicesDesc	CompensationCompensationAmt	Address Line2ContractorAddress/USAddress/AddressLine2Txt
ECHO STREET CAPITAL MGR LLC (VIA HHMI II LLC)
850 THIRD AVENUE	NEW YORK	NY	10022	INVESTMENT MGT	$6,196,565
ARAMARK HARRISON LODGING
1101 MARKET ST	PHILADELPHIA	PA	19107	CONFERENCE CTR MGT	$4,601,029
SELECT EQUITY GROUP INC
380 LAFEYETTE STREET	NEW YORK	NY	10003	INVESTMENT MGT	$4,078,681
BRIDGEWATER ASSOCIATES INC
ONE GLENDINNING PLACE	WESTPORT	CT	06880	INVESTMENT MGT	$3,004,003
JONES LANG LASALLE AMERICAS INC
525 WILLIAM PENN PLACE	PITTSBURGH	PA	15259	FACILITIES MGT	$2,637,478	SUITE 2500

Field	Value	IRS element (for citing)
Cntrct Rcvd Greater Than100 K	143	CntrctRcvdGreaterThan100KCnt
Info In Schedule O Part VIII	Yes (X)	InfoInScheduleOPartVIIIInd
All Other Contributions	$3,169,402	AllOtherContributionsAmt
Total Contributions	$3,169,402	TotalContributionsAmt

Program Service Revenue ProgramServiceRevenueGrp (2 entries)

DescDesc	BusinessBusinessCd	Total Revenue ColumnTotalRevenueColumnAmt	Related Or Exempt Func IncomeRelatedOrExemptFuncIncomeAmt
RENTAL INCOME	900099	$2,680,024	$2,680,024
TV & Film Income	900099	$100,859	$100,859

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	$2,780,883	TotalProgramServiceRevenueAmt

Investment Income InvestmentIncomeGrp

Field	Value	IRS element (for citing)
Total Revenue Column	$178,353,858	TotalRevenueColumnAmt
Unrelated Business Revenue	-$15,505,805	UnrelatedBusinessRevenueAmt
Exclusion	$193,859,663	ExclusionAmt

Royalties Revenue RoyaltiesRevenueGrp

Field	Value	IRS element (for citing)
Total Revenue Column	$15,163,416	TotalRevenueColumnAmt
Exclusion	$15,163,416	ExclusionAmt

Gross Rents GrossRentsGrp

Field	Value	IRS element (for citing)
Real	$737,409	RealAmt

Less Rental Expenses LessRentalExpensesGrp

Field	Value	IRS element (for citing)
Real	$1,800,784	RealAmt

Rental Income Or Loss RentalIncomeOrLossGrp

Field	Value	IRS element (for citing)
Real	-$1,063,375	RealAmt
Personal	$0	PersonalAmt

Net Rental Income Or Loss NetRentalIncomeOrLossGrp

Field	Value	IRS element (for citing)
Total Revenue Column	-$1,063,375	TotalRevenueColumnAmt
Unrelated Business Revenue	-$1,042,792	UnrelatedBusinessRevenueAmt
Exclusion	-$20,583	ExclusionAmt

Gross Amount Sales Assets GrossAmountSalesAssetsGrp

Field	Value	IRS element (for citing)
Securities	$79,218,394,861	SecuritiesAmt

Less Cost Oth Basis Sales Expnss LessCostOthBasisSalesExpnssGrp

Field	Value	IRS element (for citing)
Securities	$77,927,939,764	SecuritiesAmt

Gain Or Loss GainOrLossGrp

Field	Value	IRS element (for citing)
Securities	$1,290,455,097	SecuritiesAmt
Other	$0	OtherAmt

Net Gain Or Loss Investments NetGainOrLossInvestmentsGrp

Field	Value	IRS element (for citing)
Total Revenue Column	$1,328,314,168	TotalRevenueColumnAmt
Unrelated Business Revenue	$37,859,071	UnrelatedBusinessRevenueAmt
Exclusion	$1,290,455,097	ExclusionAmt

Other Revenue Misc OtherRevenueMiscGrp (3 entries)

DescDesc	BusinessBusinessCd	Total Revenue ColumnTotalRevenueColumnAmt	ExclusionExclusionAmt
CAFETERIA INCOME	900099	$278,218	$278,218
INVESTMENT EXPENSE REBATE	900099	$68,670	$68,670
CASH DISCOUNTS	900099	$101,040	$101,040

Miscellaneous Revenue MiscellaneousRevenueGrp

Field	Value	IRS element (for citing)
Total Revenue Column	$158,037	TotalRevenueColumnAmt
Related Or Exempt Func Income	$0	RelatedOrExemptFuncIncomeAmt
Unrelated Business Revenue	$0	UnrelatedBusinessRevenueAmt
Exclusion	$158,037	ExclusionAmt

Field	Value	IRS element (for citing)
Other Revenue Total	$605,965	OtherRevenueTotalAmt

Total Revenue TotalRevenueGrp

Field	Value	IRS element (for citing)
Total Revenue Column	$1,527,324,317	TotalRevenueColumnAmt
Related Or Exempt Func Income	$2,780,883	RelatedOrExemptFuncIncomeAmt
Unrelated Business Revenue	$21,310,474	UnrelatedBusinessRevenueAmt
Exclusion	$1,500,063,558	ExclusionAmt

Grants To Domestic Orgs GrantsToDomesticOrgsGrp

Field	Value	IRS element (for citing)
Total	$64,573,391	TotalAmt
Program Services	$64,573,391	ProgramServicesAmt

Grants To Domestic Individuals GrantsToDomesticIndividualsGrp

Field	Value	IRS element (for citing)
Total	$11,190,640	TotalAmt
Program Services	$11,190,640	ProgramServicesAmt

Comp Current Ofcr Directors CompCurrentOfcrDirectorsGrp

Field	Value	IRS element (for citing)
Total	$10,751,771	TotalAmt
Program Services	$2,792,751	ProgramServicesAmt
Management And General	$7,959,020	ManagementAndGeneralAmt

Comp Disqual Persons CompDisqualPersonsGrp

Field	Value	IRS element (for citing)
Total	$636,357	TotalAmt
Program Services	$636,357	ProgramServicesAmt

Other Salaries And Wages OtherSalariesAndWagesGrp

Field	Value	IRS element (for citing)
Total	$265,272,322	TotalAmt
Program Services	$231,544,875	ProgramServicesAmt
Management And General	$33,727,447	ManagementAndGeneralAmt

Pension Plan Contributions PensionPlanContributionsGrp

Field	Value	IRS element (for citing)
Total	$20,419,358	TotalAmt
Program Services	$18,125,398	ProgramServicesAmt
Management And General	$2,293,960	ManagementAndGeneralAmt

Other Employee Benefits OtherEmployeeBenefitsGrp

Field	Value	IRS element (for citing)
Total	-$3,109,363	TotalAmt
Program Services	-$8,342,925	ProgramServicesAmt
Management And General	$5,233,562	ManagementAndGeneralAmt

Payroll Taxes PayrollTaxesGrp

Field	Value	IRS element (for citing)
Total	$16,073,338	TotalAmt
Program Services	$24,771	ProgramServicesAmt
Management And General	$16,048,567	ManagementAndGeneralAmt

Fees For Services Legal FeesForServicesLegalGrp

Field	Value	IRS element (for citing)
Total	$3,018,649	TotalAmt
Program Services	$919,427	ProgramServicesAmt
Management And General	$2,099,222	ManagementAndGeneralAmt

Fees For Services Accounting FeesForServicesAccountingGrp

Field	Value	IRS element (for citing)
Total	$1,111,134	TotalAmt
Program Services	$80	ProgramServicesAmt
Management And General	$1,111,054	ManagementAndGeneralAmt

Fees For Services Lobbying FeesForServicesLobbyingGrp

Field	Value	IRS element (for citing)
Total	$71,177	TotalAmt
Management And General	$71,177	ManagementAndGeneralAmt

Fees For Srvc Invst Mgmnt Fees FeesForSrvcInvstMgmntFeesGrp

Field	Value	IRS element (for citing)
Total	$81,318,615	TotalAmt
Management And General	$81,318,615	ManagementAndGeneralAmt

Fees For Services Other FeesForServicesOtherGrp

Field	Value	IRS element (for citing)
Total	$51,366,077	TotalAmt
Program Services	$42,581,267	ProgramServicesAmt
Management And General	$8,784,810	ManagementAndGeneralAmt
Fundraising	$0	FundraisingAmt

Office Expenses OfficeExpensesGrp

Field	Value	IRS element (for citing)
Total	$3,080,852	TotalAmt
Program Services	$1,949,400	ProgramServicesAmt
Management And General	$1,131,452	ManagementAndGeneralAmt

Information Technology InformationTechnologyGrp

Field	Value	IRS element (for citing)
Total	$8,368,967	TotalAmt
Program Services	$3,867,517	ProgramServicesAmt
Management And General	$4,501,450	ManagementAndGeneralAmt

Royalties RoyaltiesGrp

Field	Value	IRS element (for citing)
Total	$6,371	TotalAmt
Program Services	$359	ProgramServicesAmt
Management And General	$6,012	ManagementAndGeneralAmt

Occupancy OccupancyGrp

Field	Value	IRS element (for citing)
Total	$70,759,962	TotalAmt
Program Services	$66,330,851	ProgramServicesAmt
Management And General	$4,429,111	ManagementAndGeneralAmt

Travel TravelGrp

Field	Value	IRS element (for citing)
Total	$8,505,409	TotalAmt
Program Services	$7,244,314	ProgramServicesAmt
Management And General	$1,261,095	ManagementAndGeneralAmt

Conferences Meetings ConferencesMeetingsGrp

Field	Value	IRS element (for citing)
Total	$3,337,554	TotalAmt
Program Services	$2,751,682	ProgramServicesAmt
Management And General	$585,872	ManagementAndGeneralAmt

Interest InterestGrp

Field	Value	IRS element (for citing)
Total	$80,743,322	TotalAmt
Program Services	$330,216	ProgramServicesAmt
Management And General	$80,413,106	ManagementAndGeneralAmt

Depreciation Depletion DepreciationDepletionGrp

Field	Value	IRS element (for citing)
Total	$77,865,561	TotalAmt
Program Services	$69,100,187	ProgramServicesAmt
Management And General	$8,765,374	ManagementAndGeneralAmt

Insurance InsuranceGrp

Field	Value	IRS element (for citing)
Total	$538,631	TotalAmt
Program Services	$217,785	ProgramServicesAmt
Management And General	$320,846	ManagementAndGeneralAmt

Other Expenses OtherExpensesGrp (4 entries)

DescDesc	TotalTotalAmt	Program ServicesProgramServicesAmt	Management And GeneralManagementAndGeneralAmt
LAB & OTHER SCIENTIFIC SUPPLIES	$103,894,581	$103,495,283	$399,298
MINOR EQUIPMENT & RENOVATIONS	$13,358,102	$14,431,554	-$1,073,452
EQUIPMENT MAINTENANCE	$18,420,976	$13,545,443	$4,875,533
Income Tax	-$94,803		-$94,803

All Other Expenses AllOtherExpensesGrp

Field	Value	IRS element (for citing)
Total	$14,239,762	TotalAmt
Program Services	$12,971,558	ProgramServicesAmt
Management And General	$1,268,204	ManagementAndGeneralAmt
Fundraising	$0	FundraisingAmt

Total Functional Expenses TotalFunctionalExpensesGrp

Field	Value	IRS element (for citing)
Total	$925,718,713	TotalAmt
Program Services	$660,282,181	ProgramServicesAmt
Management And General	$265,436,532	ManagementAndGeneralAmt
Fundraising	$0	FundraisingAmt

Savings And Temp Cash Invst SavingsAndTempCashInvstGrp

Field	Value	IRS element (for citing)
BOY	$313,788,984	BOYAmt
EOY	$856,180,834	EOYAmt

Receivables From Officers Etc ReceivablesFromOfficersEtcGrp

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

Rcvbl From Disqualified Prsn RcvblFromDisqualifiedPrsnGrp

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

Prepaid Expenses Defrd Charges PrepaidExpensesDefrdChargesGrp

Field	Value	IRS element (for citing)
BOY	$10,916,217	BOYAmt
EOY	$5,146,926	EOYAmt

Field	Value	IRS element (for citing)
Land Bldg Equip Cost Or Other Bss	$1,778,343,290	LandBldgEquipCostOrOtherBssAmt
Land Bldg Equip Accum Deprec	$1,093,878,628	LandBldgEquipAccumDeprecAmt

Land Bldg Equip Basis Net LandBldgEquipBasisNetGrp

Field	Value	IRS element (for citing)
BOY	$711,920,998	BOYAmt
EOY	$684,464,662	EOYAmt

Investments Pub Traded Sec InvestmentsPubTradedSecGrp

Field	Value	IRS element (for citing)
BOY	$7,234,725,303	BOYAmt
EOY	$6,483,770,458	EOYAmt

Investments Other Securities InvestmentsOtherSecuritiesGrp

Field	Value	IRS element (for citing)
BOY	$14,044,326,015	BOYAmt
EOY	$15,601,402,134	EOYAmt

Investments Program Related InvestmentsProgramRelatedGrp

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

Other Assets Total OtherAssetsTotalGrp

Field	Value	IRS element (for citing)
BOY	$278,738,241	BOYAmt
EOY	$185,294,431	EOYAmt

Total Assets TotalAssetsGrp

Field	Value	IRS element (for citing)
BOY	$22,594,415,758	BOYAmt
EOY	$23,816,259,445	EOYAmt

Accounts Payable Accr Expnss AccountsPayableAccrExpnssGrp

Field	Value	IRS element (for citing)
BOY	$503,181,931	BOYAmt
EOY	$469,669,342	EOYAmt

Grants Payable GrantsPayableGrp

Field	Value	IRS element (for citing)
BOY	$173,350,134	BOYAmt
EOY	$157,321,012	EOYAmt

Tax Exempt Bond Liabilities TaxExemptBondLiabilitiesGrp

Field	Value	IRS element (for citing)
BOY	$716,130,000	BOYAmt
EOY	$716,130,000	EOYAmt

Loans From Officers Directors LoansFromOfficersDirectorsGrp

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

Unsecured Notes Loans Payable UnsecuredNotesLoansPayableGrp

Field	Value	IRS element (for citing)
BOY	$1,235,453,517	BOYAmt
EOY	$1,236,233,081	EOYAmt

Other Liabilities OtherLiabilitiesGrp

Field	Value	IRS element (for citing)
BOY	$657,102,151	BOYAmt
EOY	$867,546,779	EOYAmt

Total Liabilities TotalLiabilitiesGrp

Field	Value	IRS element (for citing)
BOY	$3,285,217,733	BOYAmt
EOY	$3,446,900,214	EOYAmt

Field	Value	IRS element (for citing)
Organization Follows SFAS117	Yes (X)	OrganizationFollowsSFAS117Ind

Unrestricted Net Assets UnrestrictedNetAssetsGrp

Field	Value	IRS element (for citing)
BOY	$19,309,198,025	BOYAmt
EOY	$20,369,359,231	EOYAmt

Total Net Assets Fund Balance TotalNetAssetsFundBalanceGrp

Field	Value	IRS element (for citing)
BOY	$19,309,198,025	BOYAmt
EOY	$20,369,359,231	EOYAmt

Tot Liab Net Assets Fund Balance TotLiabNetAssetsFundBalanceGrp

Field	Value	IRS element (for citing)
BOY	$22,594,415,758	BOYAmt
EOY	$23,816,259,445	EOYAmt

Field	Value	IRS element (for citing)
Info In Schedule O Part XI	Yes (X)	InfoInScheduleOPartXIInd
Reconcilation Revenue Expnss	$601,605,604	ReconcilationRevenueExpnssAmt
Net Unrlzd Gains Losses Invst	$452,322,770	NetUnrlzdGainsLossesInvstAmt
Other Changes In Net Assets	$6,232,832	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)
Consolidated Basis Fincl Stmt	Yes (X)	ConsolidatedBasisFinclStmtInd

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)
Medical Research Organization	Yes (X)	MedicalResearchOrganizationInd

Hospital Name And Address HospitalNameAndAddressGrp

Supported Organization Name SupportedOrganizationName

Field	Value	IRS element (for citing)
Business Name Line1	BRIGHAM AND WOMENS HOSPITAL	BusinessNameLine1Txt

Field	Value	IRS element (for citing)
City	BOSTON	CityNm
State Abbreviation	MA	StateAbbreviationCd

Schedule B IRS990ScheduleB

Schedule C IRS990ScheduleC

Field	Value	IRS element (for citing)
Volunteers	false	VolunteersInd
Paid Staff Or Management	false	PaidStaffOrManagementInd
Media Advertisements	false	MediaAdvertisementsInd
Mailings Members	false	MailingsMembersInd
Publications Or Broadcast	false	PublicationsOrBroadcastInd
Grants Other Organizations	false	GrantsOtherOrganizationsInd
Direct Contact Legislators	Yes (true)	DirectContactLegislatorsInd
Direct Contact Legislators	$71,177	DirectContactLegislatorsAmt
Rallies Demonstrations	false	RalliesDemonstrationsInd
Other Activities	Yes (true)	OtherActivitiesInd
Other Activities	$2,408	OtherActivitiesAmt
Total Lobbying Expenditures	$73,585	TotalLobbyingExpendituresAmt
Not Described Section501c3	false	NotDescribedSection501c3Ind

Supplemental Information Detail SupplementalInformationDetail (2 entries)

Form And Line ReferenceFormAndLineReferenceDesc

ExplanationExplanationTxt

Schedule C, Part II-B, Line 1 DETAILED DESCRIPTION OF THE LOBBYING ACTIVITY

OTHER ACTIVITIES, SCHEDULE C, PART II-B, LINE 1g (OTHER ACTIVITIES) Amounts spent to paid lobbying firm for direct contact with federal and state legislators and their staffs on pending legislative matters. OTHER ACTIVITIES, SCHEDULE C, PART II-B, LINE 1i (OTHER ACTIVITIES) DURING THE FISCAL YEAR, HHMI WAS A MEMBER OF A NUMBER OF NON-PROFIT ORGANIZATIONS THAT ENGAGED IN LOBBYING ACTIVITIES ON BEHALF OF THEIR MEMBERSHIPS. HHMI IS REPORTING AS LOBBYING EXPENDITURES A PORTION OF THE MEMBERSHIP DUES THAT HHMI PAID TO THESE ORGANIZATIONS.

Schedule C, Part II-B, Line 1 DETAILED DESCRIPTION OF THE LOBBYING ACTIVITY

Schedule D IRS990ScheduleD

Land LandGrp

Field	Value	IRS element (for citing)
Investment Cost Or Other Basis	$807,737	InvestmentCostOrOtherBasisAmt
Other Cost Or Other Basis	$89,619,909	OtherCostOrOtherBasisAmt
Book Value	$90,427,646	BookValueAmt

Buildings BuildingsGrp

Field	Value	IRS element (for citing)
Investment Cost Or Other Basis	$10,248,413	InvestmentCostOrOtherBasisAmt
Other Cost Or Other Basis	$747,728,274	OtherCostOrOtherBasisAmt
Depreciation	$319,848,363	DepreciationAmt
Book Value	$438,128,324	BookValueAmt

Leasehold Improvements LeaseholdImprovementsGrp

Field	Value	IRS element (for citing)
Other Cost Or Other Basis	$358,998,076	OtherCostOrOtherBasisAmt
Depreciation	$338,722,605	DepreciationAmt
Book Value	$20,275,471	BookValueAmt

Equipment EquipmentGrp

Field	Value	IRS element (for citing)
Other Cost Or Other Basis	$526,534,178	OtherCostOrOtherBasisAmt
Depreciation	$426,944,887	DepreciationAmt
Book Value	$99,589,291	BookValueAmt

Other Land Buildings OtherLandBuildingsGrp

Field	Value	IRS element (for citing)
Investment Cost Or Other Basis	$921,448	InvestmentCostOrOtherBasisAmt
Other Cost Or Other Basis	$43,485,255	OtherCostOrOtherBasisAmt
Depreciation	$8,362,773	DepreciationAmt
Book Value	$36,043,930	BookValueAmt

Field	Value	IRS element (for citing)
Total Book Value Land Buildings	$684,464,662	TotalBookValueLandBuildingsAmt

Other Securities OtherSecuritiesGrp (5 entries)

DescDesc	Book ValueBookValueAmt	Method ValuationMethodValuationCd
PRIVATE EQUITY & REAL ESTATE	$5,361,232,172	F
DISTRESSED & CREDIT SENSITIVE	$2,198,301,572	F
HEDGED EQUITY	$2,297,988,866	F
MARKET NEUTRAL	$2,575,490,060	F
EQUITY COMMINGLED	$3,168,389,464	F

Field	Value	IRS element (for citing)
Total Book Value Securities	$15,601,402,134	TotalBookValueSecuritiesAmt

Other Liabilities Org OtherLiabilitiesOrgGrp (13 entries)

DescDesc	AmtAmt
SHORT POSITIONS	$471,637,540
INVESTMENT PURCH PENDING SALES	$36,991,996
CURRENCY EXCH CONTRACTS PAY	$2,973,270
DEFERRED COMPENSATION LIAB	$49,935,902
SWAP UNREALIZED LOSS	$96,586,811
INVESTMENT MANAGEMENT FEES PAYABLE	$12,895,481
DEFERRED INCOME	$2,469,430
INTEREST & DIVIDENDS ON SHORT STOCKS & BONDS	$756,508
CONTRACT FOR DIFFERENCES LIABILITY	$4,519,838
FUTURE CONTRACTS LIABILITY POSITION	$88,703
LEASE OBLIGATIONS	$17,904,483
EQUITY SWAPS - LIABILITIES	$432,422
OBLIGATION TO RETURN SECURITIES LENDING COLLATERAL	$170,354,395

Field	Value	IRS element (for citing)
Total Liability	$867,546,779	TotalLiabilityAmt
Total Rev Etc Audited Fincl Stmt	$1,871,769,139	TotalRevEtcAuditedFinclStmtAmt
Net Unrealized Gains Invst	$452,322,770	NetUnrealizedGainsInvstAmt
Other Revenue	$0	OtherRevenueAmt
Revenue Not Reported	$452,322,770	RevenueNotReportedAmt
Revenue Subtotal	$1,419,446,369	RevenueSubtotalAmt
Investment Expenses Not Incld	$109,394,008	InvestmentExpensesNotIncldAmt
Other Revenues Not Included	-$1,516,060	OtherRevenuesNotIncludedAmt
Revenue Not Reported Fincl Stmt	$107,877,948	RevenueNotReportedFinclStmtAmt
Total Revenue Per Form990	$1,527,324,317	TotalRevenuePerForm990Amt
Tot Expns Etc Audited Fincl Stmt	$796,041,933	TotExpnsEtcAuditedFinclStmtAmt
Other Expenses Included	$0	OtherExpensesIncludedAmt
Expenses Not Reported	$0	ExpensesNotReportedAmt
Expenses Subtotal	$796,041,933	ExpensesSubtotalAmt
Investment Expenses Not Incld2	$109,394,008	InvestmentExpensesNotIncld2Amt
Other Expenses Not Included	$20,282,772	OtherExpensesNotIncludedAmt
Expenses Not Rpt Fincl Stmt	$129,676,780	ExpensesNotRptFinclStmtAmt
Total Expenses Per Form990	$925,718,713	TotalExpensesPerForm990Amt

Supplemental Information Detail SupplementalInformationDetail (2 entries)

Form And Line ReferenceFormAndLineReferenceDesc	ExplanationExplanationTxt
Schedule D, Part XI, Line 4(b) Other revenues in form 990 not in audited financial statements	rental expenses - -1800784 cafeteria income etc - 284724
Schedule D, Part XII, Line 4(b) Other expenses in form 990 not in audited financial statements	Grants refunds, write-offs etc - 6232832 Postretirement amortization - 15566000 rental expenses - -1800784 cafeteria income etc - 284724

Schedule F IRS990ScheduleF

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

Account Activities Outside US AccountActivitiesOutsideUSGrp (5 entries)

RegionRegionTxt	Type Of Activities ConductedTypeOfActivitiesConductedTxt	Region Total ExpendituresRegionTotalExpendituresAmt
Central America and the Caribbean	Investments	$7,767,004,954
North America (Canada & Mexico only)	Investments	$117,315,711
Europe (Including Iceland and Greenland)	Investments	$694,873,258
East Asia and the Pacific	Investments	$89,526,911
Sub-Saharan Africa	Investments	$1

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	$8,668,720,835	SubtotalSpentAmt
Continuation Spent	$0	ContinuationSpentAmt
Total Spent	$8,668,720,835	TotalSpentAmt
Total501c3 Org	0	Total501c3OrgCnt
Total Other Org	0	TotalOtherOrgCnt
Transfer To Foreign Corp	Yes (true)	TransferToForeignCorpInd
Interest In Foreign Trust	Yes (true)	InterestInForeignTrustInd
Foreign Corp Ownership	Yes (true)	ForeignCorpOwnershipInd
Passive Foreign Investmest Co	Yes (true)	PassiveForeignInvestmestCoInd
Foreign Partnership	Yes (true)	ForeignPartnershipInd
Boycott Countries	false	BoycottCountriesInd

Supplemental Information Detail SupplementalInformationDetail (2 entries)

Form And Line ReferenceFormAndLineReferenceDesc

ExplanationExplanationTxt

Schedule F, Part I, Line 2 Procedures for monitoring use of grant funds

During its 2018 fiscal year, HHMI continued to support International Research Scholars selected through one or more competitions open to all eligible applicants. The procedures described in this section are related to grants that were accrued in a previous fiscal year. Eligibility requirements included, but were not limited to, a full-time appointment at a nonprofit scientific research organization in a country other than the United States, and a research focus on basic biological processes or disease mechanisms. Qualified applicants were evaluated by a panel of scientific experts with final selections made by HHMI leadership. The disbursement of grant funds to support the work of International Early Career Scientists and Senior International Research Scholars is made in accordance with all applicable U.S. laws. Funds are paid to an institutional account. In order to monitor the activities and productivity of the grants, each scientist is required to submit an annual progress report concerning his or her research and each grantee institution is required to submit annual financial reports. These reports are reviewed by HHMI staff. site visits and audits are conducted if warranted and grantees attend scientific meetings of HHMI US-based scientists.

Schedule F, Part I, Line 2 PROCEDURES FOR MONITORING USE OF GRANT FUNDS

Schedule I IRS990ScheduleI

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

Recipient Table RecipientTable (145 entries)

Address Line1USAddress/AddressLine1Txt	CityUSAddress/CityNm	State AbbreviationUSAddress/StateAbbreviationCd	ZIPUSAddress/ZIPCd	Recipient EINRecipientEIN	IRC SectionIRCSectionDesc	Cash GrantCashGrantAmt	Non Cash AssistanceNonCashAssistanceAmt	Purpose Of GrantPurposeOfGrantTxt
Cold Spring Harbor Lab
Bungtown Rd	Cold Spring Harbor	NY	11724	112013303	501(c)(3)	$42,000	$0	Advanced Courses
Marine Biological Lab
Marine Biological Lab	Woods Hole	MA	02543	042014690	501(c)(3)	$42,000	$0	Advanced Courses
The Jackson Lab
The Jackson Lab	Bar Harbor	ME	04609	010211513	501(c)(3)	$42,000	$0	Advanced Courses
Travel exp pd on behalf of grantees
La Jolla Cove	La Jolla	CA	92037	952099802		$14,335	$0	EXROP Program - Housing
Travel exp pd on behalf of grantees
Doubletree Hotel	Bethesda	MD	20814	814344545		$26,723	$0	EXROP Program - Travel
Boston Children's Hospital
Longwood Ave	Boston	MA	02115	042774441	501(c)(3)	$10,000	$0	Hanna Gray Scholars
Brigham Women's Hospital
Francis St	Boston	MA	02115	042312909	501(c)(3)	$10,000	$0	Hanna Gray Scholars
Brown Univ
Brown Univ	Providence	RI	02912	050258809	501(c)(3)	$11,018	$0	Hanna Gray Scholars
CA Inst of Technology
CA Inst of Technology	Pasadena	CA	91125	951643307	501(c)(3)	$22,036	$0	Hanna Gray Scholars
CA Inst of Technology
CA Inst of Technology	Pasadena	CA	91125	951643307	501(c)(3)	$10,000	$0	Hanna Gray Scholars
Cold Spring Harbor Lab
Bungtown Rd	Cold Spring Harbor	NY	11724	112013303	501(c)(3)	$10,000	$0	Hanna Gray Scholars
Fred Hutchinson Cancer Ctr
Fred Hutchinson Cancer Ctr	Seattle	WA	98109	237156071	501(c)(3)	$10,000	$0	Hanna Gray Scholars
Harvard College
Harvard University	Cambridge	MA	02138	042103580	501(c)(3)	$20,000	$0	Hanna Gray Scholars
Harvard Medical School
Harvard Medical School	Cambridge	MA	02138	042103580	501(c)(3)	$33,054	$0	Hanna Gray Scholars
Memorial Sloan Kettering
Memorial Sloan Kettering	New York	NY	10065	131924236	501(c)(3)	$11,018	$0	Hanna Gray Scholars
MIT
MIT	Cambridge	MA	02139	042103594	501(c)(3)	$20,000	$0	Hanna Gray Scholars
Rockefeller Univ
Rockefeller Univ	New York	NY	10065	131624158	501(c)(3)	$10,000	$0	Hanna Gray Scholars
Salk Institute
Salk Institute	LA Jolla	CA	920371002	952160097	501(c)(3)	$11,018	$0	Hanna Gray Scholars
Stanford Univ
Stanford Univ	Palo Alto	CA	943048445	941156365	501(c)(3)	$10,000	$0	Hanna Gray Scholars
Stanford Univ
Stanford Univ	Palo Alto	CA	943048445	941156365	501(c)(3)	$11,018	$0	Hanna Gray Scholars
The Broad Institute Inc
The Broad Institute Inc	Cambridge	MA	02142	263428781	501(c)(3)	$10,000	$0	Hanna Gray Scholars
UC - Berkeley
UC - Berkeley	Berkeley	CA	94720	946002123	CALIFORNIA	$11,018	$0	Hanna Gray Scholars
UC - San Diego
UC - San Diego	La Jolla	CA	92093	956006144	CALIFORNIA	$10,000	$0	Hanna Gray Scholars
UC - San Francisco
UC - San Francisco	San Francisco	CA	94143	946036493	CALIFORNIA	$22,036	$0	Hanna Gray Scholars
UC - San Francisco
UC - San Francisco	San Francisco	CA	94143	946036493	CALIFORNIA	$20,000	$0	Hanna Gray Scholars
Univ Of Pennsylvania
Univ Of Pennsylvania	Philadelphia	PA	191046377	231352685	501(c)(3)	$11,018	$0	Hanna Gray Scholars
Univ of Southern California
Univ of Southern California	Los Angeles	CA	90089	951642394	501(c)(3)	$10,000	$0	Hanna Gray Scholars
Univ of Texas - Southwestern
Univ of Texas - Southwestern	Dallas	TX	753909050	756002868	TEXAS	$11,018	$0	Hanna Gray Scholars
Univ of Texas - Southwestern
Univ of Texas - Southwestern	Dallas	TX	753909050	756002868	TEXAS	$10,000	$0	Hanna Gray Scholars
Univ of Virginia
Univ of Virginia	Charlottesville	VA	22904	546001796	501(c)(3)	$10,000	$0	Hanna Gray Scholars
Vanderbilt Univ
Vanderbilt Univ	Nashville	TN	37232	352528741	501(c)(3)	$10,000	$0	Hanna Gray Scholars
Yale Univ
Yale Univ	New Haven	CT	06520	060646973	501(c)(3)	$11,018	$0	Hanna Gray Scholars
Cornell Univ
Cornell Univ	Ithaca	NY	14850	150532082	501(c)(3)	$1,000,000	$0	HHMI Professors
Emory Univ
Emory Univ	Atlanta	GA	303224250	580566256	501(c)(3)	$45,000	$0	HHMI Professors
MIT
MIT	Cambridge	MA	02139	042103594	501(c)(3)	$42,310	$0	HHMI Professors
Stanford Univ
Stanford Univ	Palo Alto	CA	943048445	941156365	501(c)(3)	$2,000,000	$0	HHMI Professors
UC - Berkeley
UC - Berkeley	Berkeley	CA	947201103	946002123	CALIFORNIA	$1,000,000	$0	HHMI Professors
UC - Santa Cruz
UC - Santa Cruz	Santa Cruz	CA	950641077	941539563	CALIFORNIA	$1,000,000	$0	HHMI Professors
UC - Los Angeles
UC - Los Angeles	Los Angeles	CA	900951405	956006143	CALIFORNIA	$2,500,000	$0	HHMI Professors
Univ of Hawaii - Manoa
Univ of Hawaii - Manoa	Honolulu	HI	968222217	996000354	HAWAII	$1,000,000	$0	HHMI Professors
Univ of Texas
Univ of Texas	Austin	TX	78713	746000203	TEXAS	$2,500,000	$0	HHMI Professors
Vanderbilt Univ
Vanderbilt Univ	Nashville	TN	372401591	620476822	501(c)(3)	$1,000,000	$0	HHMI Professors
Yale Univ
Yale Univ	New Haven	CT	065103209	060646973	501(c)(3)	$1,000,000	$0	HHMI Professors
Yale Univ
Yale Univ	New Haven	CT	065208114	060646973	501(c)(3)	$54,600	$0	HHMI Professors
Arizona State Univ
Arizona State Univ	Tempe	AZ	852876011	860196696	ARIZONA	$1,020,000	$0	Inclusive Excellence
Bates College
Bates College	Lewiston	ME	04240	010211781	501(c)(3)	$1,020,000	$0	Inclusive Excellence
Brandeis Univ
Brandeis Univ	Waltham	MA	024549110	042103552	501(c)(3)	$1,020,000	$0	Inclusive Excellence
California State Univ - Fullerton
California State Univ - Fullerton	Fullerton	CA	928346866	952081258	501(c)(3)	$1,020,000	$0	Inclusive Excellence
California State Univ - San Marcos
California State Univ - San Marcos	San Marcos	CA	92096	330397688	CALIFORNIA	$1,020,000	$0	Inclusive Excellence
Chaminade Univ
Chaminade Univ	Honolulu	HI	96816	990272261	501(c)(3)	$10,000	$0	Inclusive Excellence
Davidson College
Davidson College	Davidson	NC	280355000	560529961	501(c)(3)	$1,020,000	$0	Inclusive Excellence
Delaware State Univ
Delaware State Univ	Dover	DE	19901	201372435	501(c)(3)	$10,000	$0	Inclusive Excellence
DePauw Univ
DePauw Univ	Greencastle	IN	461350037	350869045	501(c)(3)	$1,020,000	$0	Inclusive Excellence
Framingham State Univ
Framingham State Univ	Framingham	MA	017019101	043154529	MASSACHUSETTS	$1,020,000	$0	Inclusive Excellence
Humboldt State Univ
Humboldt State Univ	Arcata	CA	95521	946050071	501(c)(3)	$10,000	$0	Inclusive Excellence
James Madison Univ
James Madison Univ	Harrisonburg	VA	228070001	546001756	VIRGINIA	$1,020,000	$0	Inclusive Excellence
Kalamazoo College
Kalamazoo College	Kalamazoo	MI	49007	381358014	501(c)(3)	$1,020,000	$0	Inclusive Excellence
Kennesaw State Univ
Kennesaw State Univ	Kennesaw	GA	30144	580965786	GEORGIA	$1,020,000	$0	Inclusive Excellence
Kenyon College
Kenyon College	Gambier	OH	43022	314379507	501(c)(3)	$10,000	$0	Inclusive Excellence
Lawrence Technological Univ
Lawrence Technological Univ	Southfield	MI	48075	381369604	501(c)(3)	$10,000	$0	Inclusive Excellence
Lawrence Univ
Lawrence Univ	Appleton	WI	549115595	390806297	501(c)(3)	$1,020,000	$0	Inclusive Excellence
Mercy College
Mercy College	Dobbs Ferry	NY	10522	131967321	501(c)(3)	$1,020,000	$0	Inclusive Excellence
Mount Mary Univ
Mount Mary Univ	Milwaukee	WI	532224597	390806154	501(c)(3)	$1,020,000	$0	Inclusive Excellence
Norfolk State Univ
Norfolk State Univ	Norfolk	VA	23504	546002808	VIRGINIA	$1,020,000	$0	Inclusive Excellence
North Carolina State Univ
North Carolina State Univ	Raleigh	NC	276957617	566000756	NORTH CAROLINA	$1,020,000	$0	Inclusive Excellence
Northeastern Univ
Northeastern Univ	Boston	MA	02115	041679980	501(c)(3)	$10,000	$0	Inclusive Excellence
Oberlin College
Oberlin College	Oberlin	OH	44074	340714363	501(c)(3)	$10,000	$0	Inclusive Excellence
Oregon State Univ
Oregon State Univ	Corvallis	OR	973312140	611730890	OREGON	$1,020,000	$0	Inclusive Excellence
Radford Univ
Radford Univ	Radford	VA	24142	546001789	VIRGINIA	$10,000	$0	Inclusive Excellence
Rochester Inst of Technology
Rochester Inst of Technology	Rochester	NY	14623	160743140	501(c)(3)	$10,000	$0	Inclusive Excellence
Roosevelt Univ
Roosevelt Univ	Chicago	IL	60605	362167854	501(c)(3)	$1,020,000	$0	Inclusive Excellence
San Francisco State Univ
San Francisco State Univ	San Francisco	CA	94132	931137247	CALIFORNIA	$10,000	$0	Inclusive Excellence
The Research Foundation for SUNY
The Research Foundation for SUNY	Binghamton	NY	139026000	141368361	501(c)(3)	$10,000	$0	Inclusive Excellence
Syracuse Univ
Syracuse Univ	Syracuse	NY	132441140	150532081	501(c)(3)	$1,020,000	$0	Inclusive Excellence
The College of New Jersey
The College of New Jersey	Ewing	NJ	08628	222797398	NEW JERSEY	$1,020,000	$0	Inclusive Excellence
Towson Univ
Towson Univ	Towson	MD	21252	526002033	MARYLAND	$10,000	$0	Inclusive Excellence
Trinity Washington Univ
Trinity Washington Univ	Washington	DC	20017	530196640	501(c)(3)	$10,000	$0	Inclusive Excellence
Tufts Univ
Tufts Univ	Boston	MA	02111	042102634	501(c)(3)	$10,000	$0	Inclusive Excellence
UC - Irvine
UC- Irvine	Irvine	CA	926973100	952226406	CALIFORNIA	$20,000	$0	Inclusive Excellence
UC - Merced
UC - Merced	Merced	CA	95343	270093858	CALIFORNIA	$1,020,000	$0	Inclusive Excellence
Univ of Houston
Univ of Houston	Houston	TX	770021014	746001399	TEXAS	$1,020,000	$0	Inclusive Excellence
Univ of Illinois
Univ of Illinois	Chicago	IL	606124305	376000511	ILLINOIS	$1,020,000	$0	Inclusive Excellence
Univ of Massachusetts - Amherst
Univ of Massachusetts - Amherst	Hadley	MA	010359450	043167352	MASSACHUSETTS	$1,020,000	$0	Inclusive Excellence
Univ of Missouri
Univ of Missouri	Columbia	MO	652110001	436003859	MISSOURI	$1,020,000	$0	Inclusive Excellence
Univ of Puerto Rico
Univ of Puerto Rico	Humacao	PR	00792	660433765	PUERTO RICO	$1,020,000	$0	Inclusive Excellence
Univ of Saint Thomas
Univ of Saint Thomas	St Paul	MN	55105	410693970	501(c)(3)	$1,020,000	$0	Inclusive Excellence
Univ of Utah
Univ of Utah	Salt Lake City	UT	84112	876000525	UTAH	$1,030,000	$0	Inclusive Excellence
Univ of Wisconsin
Univ of Wisconsin	Madison	WI	537151218	396006492	WISCONSIN	$1,020,000	$0	Inclusive Excellence
Univ Of Colorado Denver
Univ Of Colorado Denver	Aurora	CO	800452571	846000555	501(c)(3)	$10,000	$0	Inclusive Excellence
Univ Of Northern Colorado
Univ Of Northern Colorado	Greeley	CO	80639	846000546	COLORADO	$10,000	$0	Inclusive Excellence
Univ Of South Dakota
Univ Of South Dakota	Vermillion	SD	57069	466003541	SOUTH DAKOTA	$10,000	$0	Inclusive Excellence
UT Rio Grande Valley
UT Rio Grande Valley	Edinburg	TX	78539	465292740	TEXAS	$10,000	$0	Inclusive Excellence
Vassar College
Vassar College	Poughkeepsie	NY	12604	141338587	501(c)(3)	$1,020,000	$0	Inclusive Excellence
VCU Foundation
VCU Foundation	Richmond	VA	232843075	540757884	501(c)(3)	$1,020,000	$0	Inclusive Excellence
Virginia Tech Univ
Virginia Tech Univ	Blacksburg	VA	24061	546001805	VIRGINIA	$10,000	$0	Inclusive Excellence
Washington Univ
Washington Univ	St Louis	MO	63112	430653611	501(c)(3)	$10,000	$0	Inclusive Excellence
Wellesley College
Wellesley College	Wellesley	MA	02481	042103637	501(c)(3)	$1,020,000	$0	Inclusive Excellence
Western Washington Univ
Western Washington Univ	Bellingham	WA	98225	916000562	WASHINGTON	$10,000	$0	Inclusive Excellence
Wheaton College (Massachusetts)
Wheaton College Massachusetts	Norton	MA	02766	042103638	501(c)(3)	$1,020,000	$0	Inclusive Excellence
Loudoun Education Foundation
Loudoun Education Foundation	Ashburn	VA	20148	541603768	501(c)(3)	$1,000,000	$0	Precollege Science - Other
Albert Einstein College of Medicine
Albert Einstein College of Medicine	Bronx	NY	10461	830621846	501(c)(3)	$300,000	$0	Medical Research
Boston Children's Hospital
Longwood Ave	Boston	MA	02115	042774441	501(c)(3)	$500,000	$0	Medical Research
Harvard Medical School
Harvard Medical School	Cambridge	MA	02138	042103580	501(c)(3)	$500,000	$0	Medical Research
Harvard Univ
Harvard Univ	Cambridge	MA	02138	042103580	501(c)(3)	$1,417,279	$0	Medical Research
Johns Hopkins Univ
Johns Hopkins Univ	Baltimore	MD	21218	520595110	501(c)(3)	$500,000	$0	Medical Research
Natl Jewish Center
Natl Jewish Center	Denver	CO	80206	742044647	501(c)(3)	$12,050	$0	Medical Research
Rockefeller Univ
Rockefeller Univ	New York	NY	10065	131624158	501(c)(3)	$260,000	$0	Medical Research
Stanford Univ
Stanford Univ	Palo Alto	CA	943048445	941156365	501(c)(3)	$400,000	$0	Medical Research
Tufts Univ
Tufts Univ	Boston	MA	02111	042103648	501(c)(3)	$451,963	$0	Medical Research
UC - Berkeley
UC - Berkeley	Berkeley	CA	94720	946002123	CALIFORNIA	$725,000	$0	Medical Research
UC - Riverside
UC - Riverside	Riverside	CA	92521	956006142	CALIFORNIA	$1,473,472	$0	Medical Research
Univ of Colorado
Univ of Colorado	Denver	CO	80203	846000555	501(c)(3)	$1,697,400	$0	Medical Research
Univ of Massachusetts
Univ of Massachusetts	Worchester	MA	01605	043167352	MASSACHUSETTS	$1,388,155	$0	Medical Research
Univ of Washington
Univ of Washington	Seattle	WA	98195	916001537	WASHINGTON	$2,261,822	$0	Medical Research
Wash Univ
Wash Univ	St Louis	MO	63130	430653611	501(c)(3)	$887,397	$0	Medical Research
Yale Univ
Yale Univ	New Haven	CT	06520	060646973	501(c)(3)	$1,128,239	$0	Medical Research
National Academy Of Sciences
2101 Constitution Avenue NW	Washington	DC	20001	530196932	501(c)(3)	$300,000	$0	Science Education
Research America
1101 King St Suite 250	Chantilly	VA	201532451	521609875	501(c)(3)	$70,000	$0	Science Education
School of Molecular & Theoretical Biology
996B San Miguel Rd	Concord	CA	94518	384003221	501(c)(3)	$81,000	$0	Science Education
Seton Hill Univ
Seton Hill Univ	Greensburg	PA	15601	250965557	501(c)(3)	$14,297	$0	Science Education Alliance
Yale Univ
Yale Univ	New Haven	CT	06508	060646973	501(c)(3)	$16,857	$0	Science Education Alliance
Amer Soc - Cell Biology
8120 Woodmont Avenue	Bethesda	MD	20814	396054285	501(c)(3)	$80,000	$0	Undergrad Science Ed
Boise State Univ
Boise State Univ	Boise	ID	83725	820290701	IDAHO	$54,000	$0	Undergrad Science Ed
Boyce Thompson Inst-Plant Research
Boyce Thompson Inst-Plant Research	Ithaca	NY	148531801	131739923	501(c)(3)	$27,500	$0	Undergrad Science Ed
Brown Univ
Brown Univ	Providence	RI	029129002	050258809	501(c)(3)	$40,000	$0	Undergrad Science Ed
CA Inst of Technology
CA Inst of Technology	Pasadena	CA	91125	951643307	501(c)(3)	$20,000	$0	Undergrad Science Ed
Cornell Univ
Cornell Univ	Ithaca	NY	148532501	150532082	501(c)(3)	$60,000	$0	Undergrad Science Ed
Fed of Am Socfor Experimental Biology
9650 Rockville Pike	Bethesda	MD	20814	520700497	501(c)(3)	$10,000	$0	Undergrad Science Ed
IUP Research Institute
IUP Research Institute	Indiana	PA	15701	571175778	501(c)(3)	$20,000	$0	Undergrad Science Ed
Institute for Cancer Research
333 Cottman Ave	Philadelphia	PA	19111	236296135	501(c)(3)	$40,000	$0	Undergrad Science Ed
Iowa State Univ
Iowa State Univ	Ames	IA	50011	426004224	501(c)(3)	$20,000	$0	Undergrad Science Ed
National Academy Of Sciences
2101 Constitution Avenue NW	Washington	DC	20001	530196932	501(c)(3)	$400,000	$0	Undergrad Science Ed
Pship for Ugrad Life Sciences Education
6252 McPherson Ave	St Louis	MO	63130	810746817	501(c)(3)	$52,186	$0	Undergrad Science Ed
Rice Univ
Rice Univ	Houston	TX	77005	741109620	501(c)(3)	$20,000	$0	Undergrad Science Ed
UC - Los Angeles
UC - Los Angeles	Los Angeles	CA	900957089	956006143	CALIFORNIA	$20,000	$0	Undergrad Science Ed
UC - Santa Cruz
UC - Santa Cruz	Santa Cruz	CA	950641077	941539563	CALIFORNIA	$20,000	$0	Undergrad Science Ed
Understanding Interventions Inc
Understanding Interventions Inc	Freehold	NJ	07728	815206569	501(c)(3)	$25,741	$0	Undergrad Science Ed
Univ Of Arizona
Univ Of Arizona	Tucson	AZ	85721	742652689	ARIZONA	$20,000	$0	Undergrad Science Ed
Univ Of Arizona
Univ Of Arizona	Tucson	AZ	85719	742652689	ARIZONA	$20,000	$0	Undergrad Science Ed
Univ of Kansas Center for Research
Univ of Kansas Center for Research	Lawrence	KS	66045	480680117	501(c)(3)	$30,000	$0	Undergrad Science Ed
Univ of Massachusetts - Amherst
Univ of Massachusetts - Amherst	Hadley	MA	010359450	043167352	MASSACHUSETTS	$20,000	$0	Undergrad Science Ed
Western Washington Univ
Western Washington Univ	Bellingham	WA	98225	916000562	501(c)(3)	$50,000	$0	Undergrad Science Ed
Yale Univ
Yale Univ	New Haven	CT	06519	060646973	501(c)(3)	$20,000	$0	Undergrad Science Ed
Yale Univ
Yale Univ	New Haven	CT	065208047	060646973	501(c)(3)	$20,000	$0	Undergrad Science Ed
UC - San Diego
UC - San Diego	La Jolla	CA	92093	956006144	CALIFORNIA	$400,000	$0	Medical Research

Field	Value	IRS element (for citing)
Total501c3 Org	143	Total501c3OrgCnt
Total Other Org	2	TotalOtherOrgCnt

Grants Other Asst To Indiv In US GrantsOtherAsstToIndivInUSGrp (4 entries)

Grant TypeGrantTypeTxt	RecipientRecipientCnt	Cash GrantCashGrantAmt
EXROP PROGRAM	80	$543,341
GILLIAM FELLOWSHIPS	50	$6,746,500
MEDICAL RESEARCH FELLOWSHIPS	61	$2,631,000
FACULTY SCHOLARS	2	$1,269,800

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	HHMI awards institutional grants in support of precollege, undergraduate, and graduate education in the US through periodic national competitions for which select institutions are eligible to apply. Each program sets out specific criteria and objectives, proposals are evaluated by a panel of experts with the final selection made by HHMI leadership. The Institute also awards fellowships to international predoctoral students, to medical students seeking to conduct basic laboratory research, and to doctoral students (the Gilliam Fellows). These grants are also awarded on a competitive basis. A small number of grants are awarded based on direct application to HHMI for specific initiatives directly related to science education. The disbursement of funds occurs principally through biomedical research institutions, universities, and colleges. HHMI grantees are required to file annual progress reports that detail expenditures in accordance with the terms of the grant, as well as full description of program activities undertaken with the funds. These are subject to careful review and analysis by HHMI staff with more detailed review by the Institute auditors as warranted. The Institute continues to assess reporting requirements to ensure the quality and timeliness of both financial and programmatic reports. In addition to site visits made by HHMI staff, program directors meet on a regular basis to discuss their activities and share information about best educational practices.	ExplanationTxt

Schedule J IRS990ScheduleJ

Field	Value	IRS element (for citing)
First Class Or Charter Travel	Yes (X)	FirstClassOrCharterTravelInd
Idemnification Gross Up Pmts	Yes (X)	IdemnificationGrossUpPmtsInd
Housing Allowance Or Residence	Yes (X)	HousingAllowanceOrResidenceInd
Written Policy Ref T And E Expnss	Yes (true)	WrittenPolicyRefTAndEExpnssInd
Substantiation Required	Yes (true)	SubstantiationRequiredInd
Compensation Committee	Yes (X)	CompensationCommitteeInd
Independent Consultant	Yes (X)	IndependentConsultantInd
Form990 Of Other Organizations	Yes (X)	Form990OfOtherOrganizationsInd
Written Employment Contract	Yes (X)	WrittenEmploymentContractInd
Compensation Survey	Yes (X)	CompensationSurveyInd
Board Or Committee Approval	Yes (X)	BoardOrCommitteeApprovalInd
Severance Payment	Yes (true)	SeverancePaymentInd
Supplemental Nonqual Rtr Plan	false	SupplementalNonqualRtrPlanInd
Equity Based Comp Arrngm	false	EquityBasedCompArrngmInd
Comp Based On Revenue Of Flng Org	false	CompBasedOnRevenueOfFlngOrgInd
Comp Bsd On Rev Related Orgs	false	CompBsdOnRevRelatedOrgsInd
Comp Bsd Net Earns Flng Org	false	CompBsdNetEarnsFlngOrgInd
Comp Bsd Net Earns Rltd Orgs	false	CompBsdNetEarnsRltdOrgsInd
Any Non Fixed Payments	Yes (true)	AnyNonFixedPaymentsInd
Initial Contract Exception	Yes (true)	InitialContractExceptionInd
Rebuttable Presumption Proc	Yes (true)	RebuttablePresumptionProcInd

Rltd Org Officer Trst Key Empl RltdOrgOfficerTrstKeyEmplGrp (23 entries)

TitleTitleTxt	Base Compensation Filing OrgBaseCompensationFilingOrgAmt	Compensation Based On Rltd OrgsCompensationBasedOnRltdOrgsAmt	Bonus Filing OrganizationBonusFilingOrganizationAmount	Bonus Related OrganizationsBonusRelatedOrganizationsAmt	Other Compensation Filing OrgOtherCompensationFilingOrgAmt	Other Compensation Rltd OrgsOtherCompensationRltdOrgsAmt	Deferred Compensation Flng OrgDeferredCompensationFlngOrgAmt	Deferred Comp Rltd OrgsDeferredCompRltdOrgsAmt	Nontaxable Benefits Filing OrgNontaxableBenefitsFilingOrgAmt	Nontaxable Benefits Rltd OrgsNontaxableBenefitsRltdOrgsAmt	Total Compensation Filing OrgTotalCompensationFilingOrgAmt	Total Compensation Rltd OrgsTotalCompensationRltdOrgsAmt	Comp Report Prior990 Filing OrgCompReportPrior990FilingOrgAmt	Comp Report Prior990 Rltd OrgsCompReportPrior990RltdOrgsAmt
BODO STERN PHD
CHIEF DEV ELOPMENT & STRATEGY OFF	$317,076	$0	$0	$0	$18,741	$0	$27,000	$0	$14,066	$0	$376,883	$0	$0	$0
ERIN K O'SHEA PHD
PRESIDENT	$976,511	$0	$0	$0	$20,371	$0	$27,000	$0	$28,681	$0	$1,052,563	$0	$0	$0
SEAN B CARROLL PHD
VP FOR SCIENCE EDUCATION	$696,183	$0	$0	$0	$21,103	$0	$27,000	$0	$30,972	$0	$775,258	$0	$0	$0
DAVID CLAPHAM PHD
VP & CHIEF SCI OFF	$633,429	$0	$0	$0	$319,767	$0	$27,000	$0	$37,119	$0	$1,017,315	$0	$0	$0
HEIDI E HENNING ESQ
VP,GENERAL COUNSEL/SEC	$602,040	$0	$0	$0	$20,700	$0	$27,000	$0	$37,815	$0	$687,555	$0	$0	$0
DENNIS MCKEARIN PHD
VP OF OPERATIONS	$441,970	$0	$30,600	$0	$5,552	$0	$27,000	$0	$32,081	$0	$537,203	$0	$0	$0
GERALD M RUBIN PHD
VP&EXEC DIR,JANELIA RES CAMPUS	$757,447	$0	$22,591	$0	$28,729	$0	$27,000	$0	$96,775	$0	$932,542	$0	$0	$0
LANDIS ZIMMERMAN
VP & CHIEF INVESTMENT OFFICER	$974,022	$0	$87,310	$0	$22,355	$0	$27,000	$0	$32,779	$0	$1,143,466	$0	$0	$0
LAUREN T SPILIOTES ESQ
DEP GENCOUNSEL/ASST SEC	$410,313	$0	$0	$0	$19,832	$0	$27,000	$0	$33,268	$0	$490,413	$0	$0	$0
SUSAN S PLOTNICK
ASSISTANT TREASURER & DIRECTOR-FINANCE	$240,763	$0	$9,051	$0	$1,473	$0	$23,415	$0	$36,674	$0	$311,376	$0	$0	$0
MONIQUE L MARCUS
CONTROLLER	$196,549	$0	$4,000	$0	$1,156	$0	$19,462	$0	$32,672	$0	$253,839	$0	$0	$0
RICHARD A PENDER
MAN DIR - US EQUITIES	$497,114	$0	$20,597	$0	$21,379	$0	$27,000	$0	$33,197	$0	$599,287	$0	$0	$0
GREGORY DENINNO
MAN DIR - PRIVATE EQUITIES	$323,142	$0	$29,353	$0	$12,204	$0	$27,000	$0	$24,135	$0	$415,834	$0	$0	$0
ROBERT J KOLYER JR
MAN DIR - DIVERSIFIED ASSETS	$494,387	$0	$218,990	$0	$21,392	$0	$27,000	$0	$30,883	$0	$792,652	$0	$0	$0
STEPHEN M KITSOULIS
MAN DIR - FIXED INCOME	$411,367	$0	$24,859	$0	$2,643	$0	$27,000	$0	$22,666	$0	$488,535	$0	$0	$0
THOMAS R CECH PHD
INVESTIGATOR	$638,730	$0	$0	$0	$34,390	$0	$27,000	$0	$34,546	$0	$734,666	$0	$0	$0
ERIC R KANDEL MD
SENIOR INVESTIGATOR	$600,949	$0	$0	$0	$28,668	$0	$27,000	$0	$35,926	$0	$692,543	$0	$0	$0
RODERICK MACKINNON MD
INVESTIGATOR	$509,226	$0	$0	$0	$24,443	$0	$27,000	$0	$14,082	$0	$574,751	$0	$0	$0
RICHARD AXEL MD
INVESTIGATOR	$510,446	$0	$0	$0	$10,218	$0	$27,000	$0	$21,119	$0	$568,783	$0	$0	$0
ROBERT TJIAN PHD
INVESTIGATOR	$546,652	$0	$0	$0	$25,813	$0	$27,000	$0	$38,440	$0	$637,905	$0	$0	$0
NITIN V KOTAK
FORMER CFO & TREASURER	$174,178	$0	$0	$0	$219,936	$0	$18,588	$0	$16,439	$0	$429,141	$0	$0	$0
JOHN PALMISANO
CHIEF OF BUSINESS SOLUTIONS/FORMER VP FOR INFORMATION TECHNOLOGY	$273,697	$0	$0	$0	$19,280	$0	$27,000	$0	$24,289	$0	$344,266	$0	$0	$0
KATHY WYSZYNSKI
FORMER VP, HUMAN RESOURCES	$167,182	$0	$0	$0	$160,287	$0	$14,813	$0	$9,352	$0	$351,634	$0	$0	$0

Supplemental Information Detail SupplementalInformationDetail (6 entries)

Form And Line ReferenceFormAndLineReferenceDesc	ExplanationExplanationTxt
Schedule J, Part I, Line 1a First-class or charter travel	Under HHMI policies, HHMI reimburses its Trustees for the reasonable cost of airfare one class above coach for domestic or international flights, and its President, Vice Presidents, and certain advisory group members for the reasonable cost of airfare at one class above coach for domestic or international flights of three hours or more. If a particular aircraft does not have a business class section, one class above coach may be first class. As an alternative, HHMI may reimburse for the cost of coach airfare plus the cost of an upgrade to travel at one level above coach for a flight of three hours or more. Such travel reimbursements are excluded from taxable compensation in accordance with HHMI's accountable plan. During fiscal year 2018, three officers and three trustees flew first class.
Schedule J, Part I, Line 1a Tax indemnification and gross-up payments	Under HHMI's moving expense reimbursement policy, if an employee is relocating at HHMI's request, HHMI will ordinarily provide a tax gross-up for the reimbursable moving expenses that must be treated as taxable to the employee. HHMI continued to follow this standard practice during the 2018 fiscal year. During fiscal year 2018, one of the officers received a tax gross-up.
Schedule J, Part I, Line 1a Housing allowance or residence for personal use	In fiscal year 2018, HHMI's President resides in an HHMI-owned house on the headquarters campus, for which she pays HHMI at a fair market rental rate. Because HHMI's President was also required to spend time at HHMI's Janelia campus, where she runs a research laboratory as well as attends meetings and participates in conferences, HHMI made an apartment available to her at that location. HHMI's Vice President and Executive Director, Janelia Research Campus, is required as a condition of employment to reside on the Janelia campus in housing built for that purpose. HHMI's Vice President and Chief Scientific Officer currently resides in an HHMI-owned apartment on the headquarters campus, for which he pays HHMI at a fair market rental rate. The Institute provides a housing assistance program for one individual who relocated to take a position with HHMI, which may be used to cover such individuals' mortgage or rent payments. In each case, the subsidy is treated as additional taxable compensation.
Schedule J, Part I, Line 4a Severance or change-of-control payment	The Institute made a severance payment to its former CFO & Treasurer in the amount of $187,384 and to its former VP, Human Resources in the amount of $126,070.
Schedule J, Part I, Line 7 Non-fixed payments	HHMI has an incentive compensation plan for its senior investment staff under which a portion of their compensation is determined based on performance of HHMI's portfolio against market benchmarks. HHMI also makes one-time payments to some of its other employees, including but not limited to officers, in recognition of exceptional performance.
Schedule J, Part I, Line 8 Payments on contract that is subject to the initial contract exception	When recruiting individuals for high-level positions, HHMI typically enters into initial contracts. HHMI has entered into initial contracts with a number of Vice Presidents. HHMI's standard practice is to have independent compensation consultants regularly review and confirm the reasonableness of compensation of HHMI's officers and key employees, regardless of whether the initial contract exception applies.

Schedule K IRS990ScheduleK

Tax Exempt Bonds Issues TaxExemptBondsIssuesGrp (4 entries)

Bond ReferenceBondReferenceCd	Bond Issuer EINBondIssuerEIN	CUSIPCUSIPNum	Bond IssuedBondIssuedDt	Issue PriceIssuePriceAmt	PurposePurposeDesc	DefeasedDefeasedInd	On Behalf Of IssuerOnBehalfOfIssuerInd	Pool FinancingPoolFinancingInd
LOUDOUN COUNTY IDA
A	521310230	545910AL5	2003-02-27	$500,000,000	FINANCE CONSTRUCTION OF JANELIA RESEARCH CAMPUS	false	false	false
LOUDOUN COUNTY IDA
B	521310230	545910AP6	2009-10-02	$23,000,000	FINANCE CONSTRUCTION OF JANELIA APT	false	false	false
LOUDOUN COUNTY IDA
C	521310230	545910AQ4	2013-05-15	$33,130,000	FINANCE CONSTRUCTION OF JANELIA APT B	false	false	false
MEDCO
D	521376562	574205FY1	2008-02-15	$83,500,000	FINANCE CONSTRUCTION OF HQ EXPANSION	false	false	false

Tax Exempt Bonds Proceeds TaxExemptBondsProceedsGrp (4 entries)

Bond ReferenceBondReferenceCd	RetiredRetiredAmt	Bond DefeasedBondDefeasedAmt	Total ProceedsTotalProceedsAmt	In Reserve FundInReserveFundAmt	Capitalized InterestCapitalizedInterestAmt	Refunding EscrowRefundingEscrowAmt	Issuance Costs From ProceedsIssuanceCostsFromProceedsAmt	Credit EnhancementCreditEnhancementAmt	Working Capital ExpendituresWorkingCapitalExpendituresAmt	Capital ExpendituresCapitalExpendituresAmt	Other Spent ProceedsOtherSpentProceedsAmt	UnspentUnspentAmt	Substantial CompletionSubstantialCompletionYr	Current RefundingCurrentRefundingInd	Advance RefundingAdvanceRefundingInd	Final Allocation MadeFinalAllocationMadeInd	Adequate Books And Rec MaintAdequateBooksAndRecMaintInd
A	$0	$0	$534,028,000	$0	$54,203,000	$0	$200,000	$0	$0	$479,625,000	$0	$0	2006	false	false	Yes (true)	Yes (true)
B	$0	$0	$23,022,042	$0	$904,914	$0	$0	$0	$43,305	$22,073,823	$0	$0	2011	false	false	Yes (true)	Yes (true)
C	$0	$0	$33,145,417	$0	$1,173,864	$0	$397,311	$0	$0	$31,574,242	$0	$0	2015	false	false	Yes (true)	Yes (true)
D	$0	$0	$84,953,297	$0	$5,954,687	$0	$631,673	$0	$0	$78,366,937	$0	$0	2010	false	false	Yes (true)	Yes (true)

Tax Exempt Bonds Private Bus Use TaxExemptBondsPrivateBusUseGrp (4 entries)

Bond ReferenceBondReferenceCd	Owning Bond Financed PropertyOwningBondFinancedPropertyInd	Any Lease ArrangementsAnyLeaseArrangementsInd	Mgmt Contract Bond Fincd PropMgmtContractBondFincdPropInd	Engage Bond Counsel ContractsEngageBondCounselContractsInd	Any Research AgreementsAnyResearchAgreementsInd	Engage Bond Counsel ResearchEngageBondCounselResearchInd	Bond Iss Meet Prvt Sec Pymt TestBondIssMeetPrvtSecPymtTestInd	Change In Use Bond Financed PropChangeInUseBondFinancedPropInd	Procs Nonqualified Bond RemdtdProcsNonqualifiedBondRemdtdInd
A	false	false	Yes (true)	Yes (true)	Yes (true)	Yes (true)	false	false	false
B	false	false	Yes (true)	Yes (true)	false		false	false	false
C	false	false	Yes (true)	Yes (true)	false		false	false	false
D	false	false	Yes (true)	Yes (true)	false		false	false	false

Tax Exempt Bonds Arbitrage TaxExemptBondsArbitrageGrp (4 entries)

Bond ReferenceBondReferenceCd	Form8038 T FiledForm8038TFiledInd	Variable Rate IssueVariableRateIssueInd	Hedge Identified In Bks And RecHedgeIdentifiedInBksAndRecInd	Term Of HedgeTermOfHedgePct	Superintegrated HedgeSuperintegratedHedgeInd	Hedge TerminatedHedgeTerminatedInd	Gross Proceeds Invested In GICGrossProceedsInvestedInGICInd	Gross Proceeds InvestedGrossProceedsInvestedInd	Written Proc To Monitor ReqsWrittenProcToMonitorReqsInd	Rebate Not Due YetRebateNotDueYetInd	Exception To RebateExceptionToRebateInd	No Rebate DueNoRebateDueInd
WELLS FARGO
A	Yes (true)	Yes (true)	Yes (true)	20.0	false	false	false	false	Yes (true)
JPMORGAN CHASE
B	false	Yes (true)	Yes (true)	30.0	false	false	false	false	Yes (true)	false	false	Yes (true)
WELLS FARGO BANK
C	false	Yes (true)	Yes (true)	30.0	false	false	false	false	Yes (true)	false		Yes (true)
JP MORGAN
D	false	Yes (true)	Yes (true)	30.0	false	false	false	false	Yes (true)	false	false	Yes (true)

Procedures Corrective Action ProceduresCorrectiveActionGrp (4 entries)

Bond ReferenceBondReferenceCd	Procedures Corrective ActionProceduresCorrectiveActionInd
A	false
B	false
C	false
D	false

Supplemental Information Detail SupplementalInformationDetail (7 entries)

Form And Line ReferenceFormAndLineReferenceDesc	ExplanationExplanationTxt
Schedule K, Part I Part I	The bond issued February 27, 2003 also includes CUSIPS 545910AM3, 545910AG6, 545910AH4, 545910AJO, and 545910AK7.
Schedule K, Part II, Line 3 Part II, Line 3 - Total Proceeds	The bonds issued on 2/27/2003, 10/2/2009, 2/15/2008 and 5/15/2013 included interest income that made up the difference between the amount of the bond issue and the total proceeds.
Schedule K, Part IV Part IV - Name of Provider	For the bond issued on 2/27/2003 $375 million notional amount of the $500 million notional amount of swaps pertaining to this bond were integrated. The other counterparties pertaining to the bond issued on 2/27/2003 were Bank of America (30 years), Goldman Sachs (30 years) and JP Morgan (30 years.)
Schedule K, Part IV, Line 4a Part IV, Line 4a	Yes, In part for the bonds issued on 2/27/2003, 10/2/2009, 2/15/2008, 5/15/2008 and 5/15/2013.
Schedule K, Part IV, Line 2c COLUMN B	Issuer name: LOUDOUN COUNTY IDA The calculation for computing no rebate due was performed on 10/08/2014
Schedule K, Part IV, Line 2c COLUMN C	Issuer name: LOUDOUN COUNTY IDA The calculation for computing no rebate due was performed on 05/09/2018
Schedule K, Part IV, Line 2c COLUMN D	Issuer name: MEDCO The calculation for computing no rebate due was performed on 02/19/2018

Schedule K IRS990ScheduleK

Tax Exempt Bonds Issues TaxExemptBondsIssuesGrp

Field	Value	IRS element (for citing)
Bond Reference	A	BondReferenceCd

Issuer Name IssuerName

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

Field	Value	IRS element (for citing)
Bond Issuer EIN	521376562	BondIssuerEIN
CUSIP	574205FZ8	CUSIPNum
Bond Issued	2008-05-15	BondIssuedDt
Issue Price	$76,500,000	IssuePriceAmt
Purpose	REFUNDING OF ISSUE TO FINANCE HQ CONSTRUCTION	PurposeDesc
Defeased	false	DefeasedInd
On Behalf Of Issuer	false	OnBehalfOfIssuerInd
Pool Financing	false	PoolFinancingInd

Tax Exempt Bonds Proceeds TaxExemptBondsProceedsGrp

Field	Value	IRS element (for citing)
Bond Reference	A	BondReferenceCd
Retired	$0	RetiredAmt
Bond Defeased	$0	BondDefeasedAmt
Total Proceeds	$76,500,000	TotalProceedsAmt
In Reserve Fund	$0	InReserveFundAmt
Capitalized Interest	$0	CapitalizedInterestAmt
Refunding Escrow	$0	RefundingEscrowAmt
Issuance Costs From Proceeds	$0	IssuanceCostsFromProceedsAmt
Credit Enhancement	$0	CreditEnhancementAmt
Working Capital Expenditures	$0	WorkingCapitalExpendituresAmt
Capital Expenditures	$0	CapitalExpendituresAmt
Other Spent Proceeds	$76,500,000	OtherSpentProceedsAmt
Unspent	$0	UnspentAmt
Substantial Completion	1993	SubstantialCompletionYr
Current Refunding	Yes (true)	CurrentRefundingInd
Advance Refunding	false	AdvanceRefundingInd
Final Allocation Made	Yes (true)	FinalAllocationMadeInd
Adequate Books And Rec Maint	Yes (true)	AdequateBooksAndRecMaintInd

Tax Exempt Bonds Private Bus Use TaxExemptBondsPrivateBusUseGrp

Field	Value	IRS element (for citing)
Bond Reference	A	BondReferenceCd
Private Bus Use By Others	0.0	PrivateBusUseByOthersPct
Private Bus Concerning UBI	0.0	PrivateBusConcerningUBIPct
Total Private Business Use	0.0	TotalPrivateBusinessUsePct

Tax Exempt Bonds Arbitrage TaxExemptBondsArbitrageGrp

Field	Value	IRS element (for citing)
Bond Reference	A	BondReferenceCd
Form8038 T Filed	Yes (true)	Form8038TFiledInd
Variable Rate Issue	Yes (true)	VariableRateIssueInd
Hedge Identified In Bks And Rec	Yes (true)	HedgeIdentifiedInBksAndRecInd

Hedge Provider Name HedgeProviderName

Field	Value	IRS element (for citing)
Business Name Line1	GOLDMAN SACHS	BusinessNameLine1Txt

Field	Value	IRS element (for citing)
Term Of Hedge	30.0	TermOfHedgePct
Superintegrated Hedge	false	SuperintegratedHedgeInd
Hedge Terminated	false	HedgeTerminatedInd
Gross Proceeds Invested In GIC	false	GrossProceedsInvestedInGICInd
Gross Proceeds Invested	false	GrossProceedsInvestedInd
Written Proc To Monitor Reqs	Yes (true)	WrittenProcToMonitorReqsInd

Procedures Corrective Action ProceduresCorrectiveActionGrp

Field	Value	IRS element (for citing)
Bond Reference	A	BondReferenceCd
Procedures Corrective Action	false	ProceduresCorrectiveActionInd

Schedule L IRS990ScheduleL

Bus Tr Involve Interested Prsn BusTrInvolveInterestedPrsnGrp

Name Of Interested NameOfInterested

Business Name BusinessName

Field	Value	IRS element (for citing)
Business Name Line1	VIKNESH SIVANATHAN	BusinessNameLine1Txt

Field	Value	IRS element (for citing)
Relationship Description	SPOUSE	RelationshipDescriptionTxt
Transaction	$115,524	TransactionAmt
Transaction	SALARY & BENEFITS	TransactionDesc
Sharing Of Revenues	false	SharingOfRevenuesInd

Supplemental Information Detail SupplementalInformationDetail

Field	Value	IRS element (for citing)
Form And Line Reference	Schedule L, Part IV, Column (d) REPORTABLE BUSINESS TRANSACTIONS	FormAndLineReferenceDesc
Explanation	AN OFFICER OF THE CORPORATION IS MARRIED TO A STAFF MEMBER.	ExplanationTxt

Schedule O IRS990ScheduleO

Supplemental Information Detail SupplementalInformationDetail (12 entries)

Form And Line ReferenceFormAndLineReferenceDesc	ExplanationExplanationTxt
Form 990, Part III, Line 4b Program Service Description	HHMI's Department of Science Education emphasizes initiatives with the power to transform graduate, undergraduate, and precollege education in the life sciences. During its 2018 fiscal year, the Institute distributed approximately $60 million in grants and fellowships to support science education. The Institute's science education programs support ties between scientific research and teaching with the goal of increasing and enhancing student research opportunities; improving science courses, curricula, and instruction; and providing enhanced graduate and medical training opportunities. Most HHMI grants are awarded through competitions with specific objectives and eligibility criteria and awards are made following a stringent process of peer review. (A) Science Education Grant and Research Programs In June, 2018, HHMI announced the second cohort of schools selected in its Inclusive Excellence initiative, bringing the total number of grantee institutions to 57. The initiative's broad objective is to help colleges and universities increase their capacity for inclusion in science of all students, especially those students who come to college via non-traditional pathways. These "new majority" students include underrepresented ethnic minorities, first-generation college students, students who transfer from community colleges, and working adults with families. HHMI continued its partnership with the University of Maryland, Baltimore County, the Pennsylvania State University, and the University of North Carolina at Chapel Hill, in the collaborative Meyerhoff Adaptation Project. The project aims to learn whether elements of UMBC's highly regarded Meyerhoff Scholars Program can be adapted and successfully implemented at other research universities. In 2018, 14 scientist-educators began their appointments as HHMI Professors. The program empowers accomplished science faculty at leading research universities to apply the rigor and creativity that make them successful in research to important challenges in undergraduate science education. The professors model fundamental reform in the way undergraduate science is taught at research universities through innovative teaching and are encouraged to share ideas and collaborate with their peers to improve science education. Sixty-nine scientists have been named HHMI professors since the program began in 2002. In addition to their commitment to student learning, these highly visible scientists have developed new educational resources and implemented novel mentoring programs to support students. The HHMI's Exceptional Research Opportunities Program (EXROP) is designed to encourage talented students who belong to groups underrepresented in science to pursue careers in science by placing selected undergraduates in summer research experiences in the labs of HHMI investigators, professors, and at the Janelia Research Campus. In 2018, a total of 80 college students (57 first-year students and 23 second-year, "EXROP Capstone" students) participated in EXROP. The 2018 cohort marked the 16th year of the program. In 2018, the Science Education Alliance Phage Hunters Advancing Genomics and Evolutionary Science (SEA-PHAGES) added 17 institutions, including 15 colleges and universities in the U.S., the University of Lagos, Nigeria, and Universidad Autonoma de Nuevo Leon, Mexico. SEA-PHAGES is a two-semester course-based research experience designed to replace the traditional introductory biology lab sequence in the undergraduate curriculum. Developed in 2008, the SEA-PHAGES program has been implemented at over 150 colleges and universities and has produced more nearly 100 publications, many including SEA-PHAGES students and faculty as co-authors. In the fall of 2017, 4,532 students, primarily freshmen and sophomores, participated in the program. HHMI's Gilliam Fellowships for Advanced Study Program supports PhD students who plan to pursue careers in academic science and who are committed to advancing diversity and inclusion in science. In FY18, HHMI awarded 45 fellowships, including to five EXROP alumni. Each award provides an annual payment of $50,000, which includes the fellow's stipend, a research allowance for the fellow, an institutional allowance to offset tuition and fees, and an allowance to support diversity and inclusion activities on the fellow's campus. In 2018, HHMI selected 67 medical and veterinary students to participate in the Medical Research Fellows Program. The fellowships enable students to take a year off from professional school to conduct laboratory research. The hope is that these students will one day choose to work at the intersection of basic research and clinical medicine. In addition to the 67 first-year fellows, 15 fellows from 2017 are participating in a second year of research. Partnerships with four other organizations-the American Society of Human Genetics, the Burroughs Wellcome Fund, the Foundation Fighting Blindness, and the Parkinson's Foundation-help to fund seven of the fellows. Now, 29 years after it was launched, the Medical Research Fellows Program has supported more than 1,800 medical, veterinary, and dental students. (B) Educational Media HHMI BioInteractive, a resource for general high school biology, AP/IB biology, and college-level introductory biology teachers, has been in existence for more than 15 years and receives 3 million unique visitors per year through its website. The Educational Media Group produces the science education resources for BioInteractive, including interactive multimedia materials, scientific animations, videos, in-class activities, as well as award-winning, broadcast-quality short films. The resources are then made available to educators online, through the BioInteractive.org website and YouTube channel, and at workshops and conventions. In July 2018, HHMI hosted approximately 80 high school and higher education educators for the second annual HHMI Educator Professional Development Conference. The five-day conference at HHMI Headquarters included four scientific talks addressing biological regulation on the molecular, physiologic, and ecological scales. The talks were given by Sean B. Carroll, HHMI Vice President of Science Education and University of Maryland, Clarrisa Nobile of the University of California-Merced, Ruben Baler, PhD of the National Institute on Drug Abuse, and Alexandra Harmon-Threatt, PhD of the University of Illinois at Urbana-Champaign. Conference attendees also participated in workshops led by experts on 'engagement, equity, and inclusion,' 'evaluation,' 'writing assessment questions,' 'writing for education publications,' 'peer feedback and self-assessment,' 'presenting professional development workshops,' and 'using BioInteractive educational resources in the classroom.' Attendees also worked to develop classroom educational resources based on the scientific talks and networked during a poster session and social time. The Educational Media Group also developed and released its first online professional learning course for educators; it focuses on evolution. Also developed and released were the award-winning Click & Learn 'CRISPR-Cas9 Mechanism and Applications' that explains the high-profile genome editing technology, and the interactive tool 'How Science Works' that allows students and educators to document, annotate, and reflect upon their own and others' scientific research process.
Form 990, Part III, Line 4b Program Service Description (Continued)	(C) Tangled Bank Studios Tangled Bank Studios, LLC, HHMI's documentary film unit, is a mission-driven production company dedicated to crafting compelling, immersive films about science and scientists. As an extension of HHMI's longstanding science education mission, the company delivers captivating and visually stunning stories to audiences worldwide. Our team works with some of the world's best filmmakers to create award-winning films for broadcast, theatrical and digital distribution. New films released this year: In March 2018, BACKYARD WILDERNESS, a 3D giant screen film which takes viewers on a surprising and spectacular journey to discover the unexpected natural wonders that lie right outside our doors, premiered at The D.C. Environmental Film Festival in advance of Earth Day. Since its premiere, it has been released in more than 30 theatres around the world including the United States, China and Canada. BACKYARD WILDERNESS is an SK Films Release, presented with the support of Teatown, an Arise Media and Archipelago Films production, in association with Reconsider Media, in collaboration with HHMI Tangled Bank Studios. It recently won 5 top awards at the Giant Screen Cinema Association, including Best Film for Lifelong Learning and Best Film - Short Subject. THE SERENGETI RULES premiered in April 2018 at the Tribeca Film Festival and has been screening at film festivals around the world, winning recognitions including Wildscreen's Panda Award for Best Theatrical Documentary, The Bergen International Film Festival's Golden Owl award, and the American Conservation Film Festival's top honor, the Green Fire award. This theatrical film chronicles a small band of young scientists headed out into the wilderness, driven by an insatiable curiosity about how nature works. Immersed in some of the most remote and spectacular places on Earth, they discovered a single set of rules that govern all life. The co-producers of the film are the Academy Award-winning Passion Planet and HHMI Tangled Bank Studios. INVENTING TOMORROW, a theatrical documentary, introduces the audience to six inspiring teenagers from around the globe who are creating cutting-edge solutions to confront some of the world's most pressing environmental threats. The film was an official selection of the 2018 Sundance Film Festival. Since its Sundance premiere, it has been screened at more than 30 film festivals and special screenings across the United States and Canada and had a theatrical release in August 2018. INVENTING TOMORROW is a Fishbowl Films Production in association with Motto Pictures, 19340 Productions, Shark Island Institute, and HHMI Tangled Bank Studios. (D) Hanna H. Gray Fellows Program In June 2016, HHMI announced a new program to recruit and retain early-career scientists who are from gender, racial, ethnic, and other groups underrepresented in the life sciences, including those from disadvantaged backgrounds. Through an open competition, HHMI selects scientists early in their training to become Hanna Gray Fellows. Each fellow will receive funding for up to eight years, with mentoring and active involvement within the HHMI community. In this two-phase program, fellows will be supported from early postdoctoral training through several years of a tenure-track faculty position. Through the current fiscal year, HHMI has selected 30 fellows to support, and will invest a total of up to $50 million for their support over eight years. A third competition is currently underway, with plans to select an additional 15 by the fall of 2019. (E) Faculty Scholars HHMI, together with the Simons Foundation, and the Bill & Melinda Gates Foundation continued to provide grant support to 82 Faculty Scholars during the current fiscal year, early-career scientists who have great potential to make unique contributions to their field. The scientists represent 43 institutions across the United States. Through the Faculty Scholars Program, HHMI and its partner philanthropies will spend up to $71.8 million over five years to support the scientists selected to receive grants. The range of five-year grant award totals is $600,000-$1.8 million, including indirect costs. Faculty Scholars are required to devote at least 50 percent of their total effort to the direct conduct of research. (F) eLife - Open Access Journal HHMI, together with the Wellcome Trust and the Max Planck Society, continues to support a top tier scientific journal called eLife. The online journal follows an open access model and is directed by practicing scientists. eLife Sciences Publications, Ltd., is an independent non-profit entity governed by a separate board of directors. eLife began publishing research articles in late 2012 and is publishing articles online on a regular basis.
Form 990, Part VI, Line 4 Significant changes to organizational documents	The Institution amended and restated its Certificate of Incorporation to update its primary purpose and update its registered agent address.
Form 990, Part VI, Line 11b Review of form 990 by governing body	The Howard Hughes Medical Institute's Form 990 is initially prepared by its Tax Compliance Department, in coordination with other HHMI departments as needed. The draft return is reviewed by senior management of HHMI and by attorneys in HHMI's Office of the General Counsel. Following these reviews and the resolution of any questions that have been raised, the draft return is reviewed by HHMI's outside tax preparer. Finally, a copy of the return is provided to the members of HHMI's Board of Trustees so that they have an opportunity to review and comment on the return before it is filed.
Form 990, Part VI, Line 12c Conflict of interest policy	In addition to HHMI's code of conduct, which addresses conflicts of interest and applies to all HHMI employees, officers, Trustees, and advisors, HHMI has specific conflict of interest policies for different categories of personnel. Under the HHMI policies that apply to Trustees, officers, and key employees, these individuals must disclose annually interests that could give rise to conflicts of interest, and must certify annually their compliance with the conflict of interest policy that applies to them. Annual disclosures and certifications are reviewed by HHMI's Office of the General Counsel, and by other HHMI managers as needed. The conflict of interest policy covering HHMI's Trustees also requires each Trustee to disclose to the other Trustees any actual or apparent conflict of interest with respect to a proposed HHMI transaction. If the other Trustees decide that there is only the appearance of a conflict of interest, and that it could not reasonably be considered to affect the independent, unbiased judgment of the disclosing Trustee with respect to the transaction at issue, no further action is required to address the apparent conflict. In all other cases, including all actual conflicts of interest, the disclosing Trustee is not permitted to participate in the deliberation or decision regarding the transaction under consideration, and must leave the room during the deliberation and vote. The conflict of interest policies covering HHMI's officers and key employees require each covered individual to obtain supervisory approval up to the level of HHMI's President before entering into an affiliation with or acquiring an interest of 1% or more in any entity that is or may become a recipient of HHMI funds. HHMI's President, in consultation with HHMI's General Counsel, may permit the affiliation or interest if it would not interfere with the covered individual's performance of his or her HHMI responsibilities, would not create the appearance of a conflict of interest, and would be consistent with sound business judgment. HHMI's President may set conditions on approval, for example that there be no remuneration to the covered individual. Proposed affiliations and interests of 1% or more of HHMI's President are subject to the approval of the Chairman of the Trustees.
Form 990, Part VI, Line 15a Process to establish compensation of top management official	The compensation for HHMI's President, other officers, and key employees is set using the following procedures: Every other year, the Audit and Compensation Committee of HHMI's Board of Trustees engages one or more independent compensation consultants to conduct a study of comparable market data. The study includes data for HHMI's President, other officers, and key employees. The independent compensation consultants also provide an opinion regarding the reasonableness of the compensation arrangements for the positions included in the study. The study includes comparable market data for all components of compensation for each person covered by the study, including base salary, incentive compensation (if any), and benefits. The Committee relies on the market data and opinion provided by the compensation consultant in making recommendations to the Board of Trustees regarding compensation for HHMI's President, other officers and key employees. The decision is made by independent Trustees. Any Trustee who has a conflict of interest with respect to a specific officer or key employee must recuse himself or herself from the decision on that person's compensation, and leave the meeting room during the debate and voting on it. In the alternate years when a study is not done, the Audit and Compensation Committee confirms with the independent compensation consultants that the range of any proposed merit increases for HHMI employees, including senior management, is reasonable compared with generally prevailing compensation increases in the market over the past year. The Committee relies on this advice in recommending compensation for HHMI's President, other officers and key employees, and the Board of Trustees relies on this advice in making compensation decisions. Recusal procedures are the same as in the years when a study is done. In each year, minutes of the discussions and decisions regarding compensation are prepared after each meeting and are submitted for approval at the next meeting. Approved minutes are kept in HHMI's records. All minutes include the date of the meeting, identify those Trustees who attended and voted on the compensation arrangements, and note any recusals of Trustees with a conflict of interest. The comparability studies and opinions relied on at the meeting are referenced in the minutes, and copies of these materials are also kept in HHMI's records. HHMI's Board of Trustees followed this process in August 2016 and August 2017 in determining compensation for the following positions for fiscal year 2018: President, Vice Presidents, and Managing Directors - Investments.
Form 990, Part VI, Line 15b Process to establish compensation of other employees	The compensation for HHMI's President, other officers, and key employees is set using the following procedures: Every other year, the Audit and Compensation Committee of HHMI's Board of Trustees engages one or more independent compensation consultants to conduct a study of comparable market data. The study includes data for HHMI's President, other officers, and key employees. The independent compensation consultants also provide an opinion regarding the reasonableness of the compensation arrangements for the positions included in the study. The study includes comparable market data for all components of compensation for each person covered by the study, including base salary, incentive compensation (if any), and benefits. The Committee relies on the market data and opinion provided by the compensation consultant in making recommendations to the Board of Trustees regarding compensation for HHMI's President, other officers and key employees. The decision is made by independent Trustees. Any Trustee who has a conflict of interest with respect to a specific officer or key employee must recuse himself or herself from the decision on that person's compensation, and leave the meeting room during the debate and voting on it. In the alternate years when a study is not done, the Audit and Compensation Committee confirms with the independent compensation consultants that the range of any proposed merit increases for HHMI employees, including senior management, is reasonable compared with generally prevailing compensation increases in the market over the past year. The Committee relies on this advice in recommending compensation for HHMI's President, other officers and key employees, and the Board of Trustees relies on this advice in making compensation decisions. Recusal procedures are the same as in the years when a study is done. In each year, minutes of the discussions and decisions regarding compensation are prepared after each meeting and are submitted for approval at the next meeting. Approved minutes are kept in HHMI's records. All minutes include the date of the meeting, identify those Trustees who attended and voted on the compensation arrangements, and note any recusals of Trustees with a conflict of interest. The comparability studies and opinions relied on at the meeting are referenced in the minutes, and copies of these materials are also kept in HHMI's records. HHMI's Board of Trustees followed this process in August 2016 and August 2017 in determining compensation for the following positions for fiscal year 2018: President, Vice Presidents, and Managing Directors - Investments.
Form 990, Part VI, Line 19 Required documents available to the public	HHMI's practice has been to make a copy of its charter and by-laws available on request. HHMI's code of conduct, which addresses conflicts of interest, is available to the public on the HHMI website. A downloadable copy of HHMI's most recent audited financial statements is also available to the public on the website.
Form 990, Part VIII, Line 11d Other Miscellaneous Revenue	- Total Revenue: 9000, Related or Exempt Function Revenue: , Unrelated Business Revenue: , Revenue Excluded from Tax Under Sections 512, 513, or 514: 9000; - Total Revenue: 149037, Related or Exempt Function Revenue: , Unrelated Business Revenue: , Revenue Excluded from Tax Under Sections 512, 513, or 514: 149037;
Form 990, Part XI, Line 9 Other changes in net assets or fund balances	Grants refunds, write-offs etc. - 6232832;
Schedule A, Part I, Line 4 List of Hospital Affiliations	List of hospital affiliations for e-filing: Hospital, City, State, Zip Code- B&W Hospital, Boston, MA 02115/ Children's Hosp, Boston, MA 02115/ Children's Hosp, Cincinnati, OH 45229/ Dana-Farber, Boston, MA 02115/ Fred Hutch , Seattle, WA 98109/ JHopkins Hosp, Baltimore, MD 21205/ Mass Gen Hosp, Boston, MA 02129/ MSKCC, New York, NY 10021/ St. Jude, Memphis, TN 38105/ Duke-Duke Hosp, Durham, NC 27706/ NYU-NYU Hosps, New York, NY 10016/ OHSU-OHSU Hosp, Portland, OR 97239/ Rockefeller-Hosp, New York, NY 10021/ UCLA-Med Ctr, Los Angeles, CA 90095/ UCSF-UCSF Hosps, San Francisco, CA 94143/ UIowa-UIowa Hosps, Iowa City, IA 52242/ UMass-Med Ctr, Worcester, MA 01605/ UMich-UMich Hosp, Ann Arbor, MI 48109/ UPenn-UPenn Hosp, Philadelphia, PA 19104/ UT-Austin-UT Hosp, Austin, TX 78712/ UTSW-UTSW Hosps, Dallas, TX 75390/ UUtah-UUtah Hosps, Salt Lake City, UT 84112/ UWash-Med Ctr, Seattle, WA 98195/ AECOM-affil hosps, New York, NY 10461/ Baylor-aff hosps, Houston, TX 77030/ Brandeis-aff hsps, Waltham, MA 02254/ CalTech-aff hosps, Pasadena, CA 91125/ Carnegie-aff hsps, Baltimore, MD 21218/ CSHL-affil hosps, Cold Spring Harbor, NY 11724/ Columbia-aff hsps, New York, NY 10027/ Cornell-aff hosps, New York, NY 14853/ Harvard-aff hosps, Cambridge, MA 02138/ Indiana-affil hosp, Bloomington, IN 47405/ TJL-affil hosps, Bar Harbor, ME 04609/ JHU-affil hosps, Baltimore, MD 21218/ MichSU-affil hosps, Lansing, MI 48824/ MIT-affil hosps, Boston, MA 02139/ NWU-affil hosps, Evanston, IL 60208/ PSU-affil hosps, State College, PA 16802/ Princeton-aff hosps, Princeton, NJ 08544/ Salk-affil hosps, La Jolla, CA 92093/ Scripps-affil hosps, La Jolla, CA 92037/ Stanford-affil hosps, Palo Alto, CA 94305/ Stowers-aff hosps, Kansas City, MO 64110/ TuftsU-aff hosps, Boston, MA 02111/ UCB-affil hosps, Berkeley, CA 94720/ UC-Davis-affil hsp, Davis, CA 95616/ UCR-affil hosps, Riverside, CA 92521/ UCSD-aff hosps, San Diego, CA 92093/ UCSC-aff hosps, Santa Cruz, CA 95064/ UChi-affil hosp, Chicago, IL 60637/ UColo-aff hosp, Boulder, CO 80309/ UIllinois-aff hsp, Urbana, IL 61801/ UMD-affil hosp, Baltimore, MD 21201/ UMD-affil hosp, College Park, MD 20742/ UMinn-aff hosps, Minneapolis, MN 55414/ UNC-affil hosps, Chapel Hill, NC 27599/ UOregon-aff hsp, Eugene, OR 97403/ UWisc-affil hosps, Madison, WI 53706/ WashU-aff hosp, St. Louis, MO 63130/ Whitehead-affil hosps, Cambridge, MA 02138/ YaleU-affil hosp, New Haven, CT 06520
Schedule A, Part I, Line 4 MRO Qualification	The Institute is a medical research organization for its taxable year ended August 31, 2018, as its expenditures of $ 775,917,201 on a cash basis for the year ended August 31 , 2017 exceeded the MRO requirement of $715,062,918 (3.5% of the HHMI endowment).

Schedule R IRS990ScheduleR

Id Disregarded Entities IdDisregardedEntitiesGrp (55 entries)

Address Line1USAddress/AddressLine1Txt	CityUSAddress/CityNm	State AbbreviationUSAddress/StateAbbreviationCd	ZIPUSAddress/ZIPCd	Primary ActivitiesPrimaryActivitiesTxt	Legal Domicile StateLegalDomicileStateCd	Total IncomeTotalIncomeAmt	End Of Year AssetsEndOfYearAssetsAmt	Business Name Line1DirectControllingEntityName/BusinessNameLine1Txt	EINEIN	Address Line1ForeignAddress/AddressLine1Txt	Province Or StateForeignAddress/ProvinceOrStateNm	CountryForeignAddress/CountryCd	Foreign PostalForeignAddress/ForeignPostalCd	Legal Domicile Foreign CountryLegalDomicileForeignCountryCd	Address Line2USAddress/AddressLine2Txt
HHMI II LLC
4000 JONES BRIDGE ROAD	CHEVY CHASE	MD	20815	INVESTMENT	DE	$43,567,242	$589,788,167	HHMI
HHMI IV LLC
4000 JONES BRIDGE ROAD	CHEVY CHASE	MD	20815	INVESTMENT	DE	$0	$0	HHMI
HHMI V LLC
4000 JONES BRIDGE ROAD	CHEVY CHASE	MD	20815	INVESTMENT	DE	$0	$0	HHMI
HHMI XII LLC
4000 JONES BRIDGE ROAD	CHEVY CHASE	MD	20815	INVESTMENT	DE	$0	$0	HHMI
HHMI XVI LLC
4000 JONES BRIDGE ROAD	CHEVY CHASE	MD	20815	INVESTMENT	DE	$0	$0	HHMI
SPRUGOS INVESTMENTS II LLC
4000 JONES BRIDGE ROAD	CHEVY CHASE	MD	20815	INVESTMENT	DE	$0	$0	HHMI
SPRUGOS INVESTMENTS V LLC
4000 JONES BRIDGE ROAD	CHEVY CHASE	MD	20815	INVESTMENT	DE	$0	$0	HHMI
SPRUGOS INVESTMENTS VII LLC
4000 JONES BRIDGE ROAD	CHEVY CHASE	MD	20815	INVESTMENT	DE	$28,950,051	$312,420,816	HHMI
SPRUGOS INVESTMENTS VIII LLC
4000 JONES BRIDGE ROAD	CHEVY CHASE	MD	20815	INVESTMENT	DE	$32,958,995	$262,241,726	HHMI
SPRUGOS INVESTMENTS X LLC
4000 JONES BRIDGE ROAD	CHEVY CHASE	MD	20815	INVESTMENT	DE	$0	$0	HHMI
SPRUGOS INVESTMENTS XI LLC
4000 JONES BRIDGE ROAD	CHEVY CHASE	MD	20815	INVESTMENT	DE	$10,227,267	$100,942,401	HHMI
SPRUGOS INVESTMENTS XII LLC
4000 JONES BRIDGE ROAD	CHEVY CHASE	MD	20815	INVESTMENT	DE	$4,508	$139,433	HHMI
SPRUGOS INVESTMENTS XIII LLC
4000 JONES BRIDGE ROAD	CHEVY CHASE	MD	20815	INVESTMENT	DE	$0	$0	HHMI
PRIVATE EQUITY HOLDING LLC
4000 JONES BRIDGE ROAD	CHEVY CHASE	MD	20815	INVESTMENT	DE	$0	$0	HHMI
PRIVATE EQUITY HOLDING-AHEAD LLC
4000 JONES BRIDGE ROAD	CHEVY CHASE	MD	20815	INVESTMENT	DE	$0	$0	HHMI
PRIVATE EQUITY HOLDING-ALEXA LLC
4000 JONES BRIDGE ROAD	CHEVY CHASE	MD	20815	INVESTMENT	DE	$0	$0	HHMI
PRIVATE EQUITY HOLDING-CS CAPITAL LLC
4000 JONES BRIDGE ROAD	CHEVY CHASE	MD	20815	INVESTMENT	DE	$0	$0	HHMI
PRIVATE EQUITY HOLDING-EUROCASTLE LLC
4000 JONES BRIDGE ROAD	CHEVY CHASE	MD	20815	INVESTMENT	DE	-$18,124,265	$0	HHMI
PRIVATE EQUITY HOLDING-FAVRILLE LLC
4000 JONES BRIDGE ROAD	CHEVY CHASE	MD	20815	INVESTMENT	DE	$0	$0	HHMI
PRIVATE EQUITY HOLDING-KAP LLC
4000 JONES BRIDGE ROAD	CHEVY CHASE	MD	20815	INVESTMENT	DE	$0	$0	HHMI
PRIVATE EQUITY HOLDING-ROYCE LLC
4000 JONES BRIDGE ROAD	CHEVY CHASE	MD	20815	INVESTMENT	DE	$0	$0	HHMI
PRIVATE EQUITY HOLDING-STORERETRO LLC
4000 JONES BRIDGE ROAD	CHEVY CHASE	MD	20815	INVESTMENT	DE	$0	$0	HHMI
PRIVATE EQUITY HOLDING-XENOPORT LLC
4000 JONES BRIDGE ROAD	CHEVY CHASE	MD	20815	INVESTMENT	DE	$0	$0	HHMI
HHMI FI I LLC
4000 JONES BRIDGE ROAD	CHEVY CHASE	MD	20815	INVESTMENT	DE	$0	$0	HHMI
JANELIA FARM HOLDING LLC
4000 JONES BRIDGE ROAD	CHEVY CHASE	MD	20815	INVESTMENT	VA	$0	$0	HHMI
SELDEN ISLAND HOLDING LLC
4000 JONES BRIDGE ROAD	CHEVY CHASE	MD	20815	INVESTMENT	VA	$0	$0	HHMI
HHMI I LLC
4000 JONES BRIDGE ROAD	CHEVY CHASE	MD	20815	INVESTMENT	DE	$0	$0	HHMI
HHMI III LLC
4000 JONES BRIDGE ROAD	CHEVY CHASE	MD	20815	INVESTMENT	DE	$0	$0	HHMI
HHMI VI LLC
4000 JONES BRIDGE ROAD	CHEVY CHASE	MD	20815	INVESTMENT	DE	$0	$0	HHMI
HHMI VII LLC
4000 JONES BRIDGE ROAD	CHEVY CHASE	MD	20815	INVESTMENT	DE	$15,998,960	$85,302,047	HHMI
HHMI VIII LLC
4000 JONES BRIDGE ROAD	CHEVY CHASE	MD	20815	INVESTMENT	DE	$0	$0	HHMI
HHMI IX LLC
4000 JONES BRIDGE ROAD	CHEVY CHASE	MD	20815	INVESTMENT	DE	$0	$0	HHMI
HHMI X LLC
4000 JONES BRIDGE ROAD	CHEVY CHASE	MD	20815	INVESTMENT	DE	$0	$0	HHMI
HHMI XI LLC
4000 JONES BRIDGE ROAD	CHEVY CHASE	MD	20815	INVESTMENT	DE	$0	$0	HHMI
HHMI XIII LLC
4000 JONES BRIDGE ROAD	CHEVY CHASE	MD	20815	INVESTMENT	DE	$0	$0	HHMI
HHMI XIV LLC
4000 JONES BRIDGE ROAD	CHEVY CHASE	MD	20815	INVESTMENT	DE	$0	$0	HHMI
HHMI XV LLC
4000 JONES BRIDGE ROAD	CHEVY CHASE	MD	20815	INVESTMENT	DE	$0	$0	HHMI
SPRUGOS INVESTMENTS LLC
4000 JONES BRIDGE ROAD	CHEVY CHASE	MD	20815	INVESTMENT	DE	$0	$0	HHMI
SPRUGOS INVESTMENTS III LLC
4000 JONES BRIDGE ROAD	CHEVY CHASE	MD	20815	INVESTMENT	DE	$46,281,170	$422,364,621	HHMI
SPRUGOS INVESTMENTS IV LLC
4000 JONES BRIDGE ROAD	CHEVY CHASE	MD	20815	INVESTMENT	DE	$0	$0	HHMI
SPRUGOS INVESTMENTS VI LLC
4000 JONES BRIDGE ROAD	CHEVY CHASE	MD	20815	INVESTMENT	DE	$0	$0	HHMI
SPRUGOS INVESTMENTS IX LLC
4000 JONES BRIDGE ROAD	CHEVY CHASE	MD	20815	INVESTMENT	DE	$46,041,619	$437,637,622	HHMI
SPRUGOS-FRENCH LLC
4000 JONES BRIDGE ROAD	CHEVY CHASE	MD	20815	INVESTMENT	DE	$0	$0	HHMI
PRIVATE EQUITY HOLDING II LLC
4000 JONES BRIDGE ROAD	CHEVY CHASE	MD	20815	INVESTMENT	DE	$0	$0	HHMI
PRIVATE EQUITY HOLDING III LLC
4000 JONES BRIDGE ROAD	CHEVY CHASE	MD	20815	INVESTMENT	DE	$0	$0	HHMI
RELATIVE VALUE STRATEGIES LLC
4000 JONES BRIDGE ROAD	CHEVY CHASE	MD	20815	INVESTMENT	DE	$0	$0	HHMI
PSG LLC
4000 JONES BRIDGE ROAD	CHEVY CHASE	MD	20815	INVESTMENT	DE	$0	$0	HHMI
HHMI-SA LLC
4000 JONES BRIDGE ROAD	CHEVY CHASE	MD	20815	RESEARCH	DE	$0	$0	HHMI
TANGLED BANK STUDIOS LLC
4000 JONES BRIDGE ROAD	CHEVY CHASE	MD	20815	FILM PROD	DE	$0	$0	HHMI
MISSING LINK PRODUCTIONS LLC
4000 JONES BRIDGE ROAD	CHEVY CHASE	MD	20815	FILM PROD	DE	$0	$0	HHMI	471329820
LSV ADVANTAGE INTL III (CAYMAN) LTD
				INVESTMENT		$718,920	$12,191,178	HHMI	980689621	89 NEXUS WAY 2/F CANAMA BAY	GRAND CAYMAN	CJ	KY11205	CJ
LSV ADVANTAGE INTL III-B (CAYMAN) LTD
				INVESTMENT		-$3,011,040	$76,944,560	HHMI	981087158	89 NEXUS WAY 2/F CAMANA BAY	GRAND CAYMAN	CJ	KY11205	CJ
AROSA CAPITAL MANAGEMENT MIDSTREAM FUND LLC
c/o Arosa Capital Management LP	New York	NY	10036	INVESTMENT	DE	-$10,765,691	$150,264,588	HHMI	812676294						120 West 45th St Ste 3700
LSV ADVANTAGE INTERNATIONAL III LLC
540 MADISON AVENUE 33RD FL	New York	NY	10022	INVESTMENT	DE	$2,084,899	$13,204,402	HHMI
LSV ADVANTAGE INTERNATIONAL III-B LLC
540 MADISON AVENUE 33RD FL	New York	NY	10022	INVESTMENT	DE	$17,301,660	$122,817,587	HHMI

Id Related Org Txbl Partnership IdRelatedOrgTxblPartnershipGrp (21 entries)

EINEIN	Primary ActivitiesPrimaryActivitiesTxt	Legal Domicile Foreign CountryLegalDomicileForeignCountryCd	Business Name Line1DirectControllingEntityName/BusinessNameLine1Txt	Predominant Income TypePredominantIncomeTypeTxt	Share Of Total IncomeShareOfTotalIncomeAmt	Share Of EOY AssetsShareOfEOYAssetsAmt	Disproportionate AllocationsDisproportionateAllocationsInd	UBI Code VUBICodeVAmt	General Or Managing PartnerGeneralOrManagingPartnerInd	OwnershipOwnershipPct	Address Line1USAddress/AddressLine1Txt	Address Line2USAddress/AddressLine2Txt	CityUSAddress/CityNm	State AbbreviationUSAddress/StateAbbreviationCd	ZIPUSAddress/ZIPCd	Legal Domicile StateLegalDomicileStateCd	Address Line1ForeignAddress/AddressLine1Txt	Province Or StateForeignAddress/ProvinceOrStateNm	CountryForeignAddress/CountryCd	Foreign PostalForeignAddress/ForeignPostalCd	CityForeignAddress/CityNm	Address Line2ForeignAddress/AddressLine2Txt
CERBERUS HH PARTNERS LP
981102879	INVESTMENT	CJ	HHMI	Excluded	$8,179,757	$89,635,223	false	$0	false	0.92
GEM NPL CO-INV FUND LP
464232021	INVESTMENT		HHMI	Excluded	$319,972	$179,709	Yes (true)	$0	false	0.67	900 NORTH MICHIGAN AVENUE SUITE 14	SUITE 1450	CHICAGO	IL	60611	IL
HHLF LP
462823996	INVESTMENT		HHMI	Excluded	$1,106,070	$0	false	$0	false	0.84	555 5TH AVENUE FL18		NEW YORK	NY	10017	NY
LUMINUS CREDIT OPPORTUNITIES PIE I LP
261963557	INVESTMENT		HHMI	Excluded	$665	$5,471,114	false	$0	false	0.99	1700 BROADWAY 38TH FLOOR		NEW YORK	NY	10019	NY
SOLUS OPPORTUNITIES FUND 2 LP
463541945	INVESTMENT		HHMI	Excluded	$7,085,850	$28,909,444	false	$0	false	0.94	410 PARK AVENUE 11TH FLOOR		NEW YORK	NY	10022	NY
CVI HH INVESTMENTS LP
901010136	INVESTMENT		HHMI	Excluded	$8,022,720	$183,601,745	false	$552	false	1	9320 EXCELSIOR BLVD	MS144-7-2	HOPKINS	MN	55343	MN
ECHO STREET GOODCO SELECT II LP
474827277	INVESTMENT		HHMI	Excluded	$6,490,662	$356,605,149	false	$0	false	0.69	10 EAST 53RD STREET	32ND FLOOR	NEW YORK	NY	10022	NY
GEM BVP CO-INV-A LP
472251559	INVESTMENT		HHMI	Excluded	$74,993	$9,142,400	false	$0	false	1	900 NORTH MICHIGAN AVENUE	SUITE 1450	CHICAGO	IL	60611	IL
HH HOLDCO CO-INVESTMENT FUND LP
300864915	INVESTMENT		HHMI	Excluded	$14,698,535	$31,361,827	false	$0	false	0.93	32 BROADWAY SUITE 1201		NEW YORK	NY	10004	NY
HH SG SECONDARY FUND LP
473358493	INVESTMENT		HHMI	Excluded	-$4,075,931	$0	false	-$150,212	false	0	825 THIRD AVENUE	10TH FLOOR	NEW YORK	NY	10022	NY
TOURMALET MATAWIN OFFSHORE FUND VI-A LP
	INVESTMENT	CJ	HHMI	Excluded	$8,012,813	$33,141,618	false	$0	false	1							89 NEXUS WAY CAMANA BAY	GRAND CAYMAN	CJ	KY19007
HH SG SECONDARY FUND II LP
811581915	INVESTMENT		HHMI	Excluded	$293,949	$0	false	$0	false	0.252	825 THIRD AVENUE 10TH FLOOR		NEW YORK	NY	10022	NY
AROSA MIDSTREAM FUND LP
811723636	INVESTMENT		Arosa Capital Management Midstream Fund LLC	Excluded	-$10,765,691	$150,264,588	false	$0	false	0.9848	C/O Arosa Capital Management LP	120 West 45th St Ste 3700	New York	NY	10036	DE
COLHM STRATEGIC PARTNERS LP
453436140	INVESTMENT		HHMI	Excluded	$5,155,621	$69,155,857	false	$0	false	0.9987	515 South Flower St 44th Fl		Los Angeles	CA	90071	CA
AGHAP FEEDER LLC
822892485	INVESTMENT		HHMI	Excluded	-$36,572	$76,641,528	false	-$55,034	false	0.64	601 CARLSON PKWY STE 200		MINNETONKA	MN	55305	DE
EJF DO FUND (CAYMAN) LP
981043181	INVESTMENT	CJ	HHMI	Excluded	-$1,785,893	$145,306	false	$0	false	1							27 HOSPITAL ROAD	GRAND CAYMAN	CJ	KY19008	GEORGE TOWN
HH ELLINGTON MASTER FUND LTD
981020904	INVESTMENT	CJ	HH ELLINGTON FUND LTD	Excluded	$5,197,565	$213,173,124	false	$0	false	0.9424							WALKER HOUSE 87 MARY ST	GRAND CAYMAN	CJ	KY11104	GEORGE TOWN
SERENGETI MULTI-SERIES MASTER LLC SERIES HH
	INVESTMENT	CJ	SERENGETI SEGREGATED PORTFOLIO COMPANY LTD PORTFOLIO HH	Excluded	$1,551,891	$56,277,090	false	$0	false	0.9959							2 BLOOR STREET EAST	ONTARIO	CA	M4W1A8	TORONTO	SUITE 2700
SERENGETI MULTI-SERIES INTERMEDIATE LLC SERIES HH
	INVESTMENT	CJ	SERENGETI SEGREGATED PORTFOLIO COMPANY LTD PORTFOLIO HH	Excluded	$1,551,891	$56,277,090	false	$0	false	0.9959							2 BLOOR STREET EAST	ONTARIO	CA	M4W1A8	TORONTO	SUITE 2700
MADISON ACQUISITION 4 LP
364705548	INVESTMENT		LSV Advantage International III-B LLC	Excluded	-$4,049,122	$9,075,243	false	$0	false	0.6812	540 MADISON AVENUE 33RD FL		NEW YORK	NY	10022	DE
MADISON ACQUISITION 55 LP
813367909	INVESTMENT		LSV ADVANTAGE INTERNATIONAL III-B LLC	Excluded	$4,952,149	$12,871,839	false	$0	false	0.5736	540 MADISON AVENUE 33RD FL		NEW YORK	NY	10022	DE

Id Related Org Txbl Corp Tr IdRelatedOrgTxblCorpTrGrp (23 entries)

Address Line1USAddress/AddressLine1Txt	CityUSAddress/CityNm	State AbbreviationUSAddress/StateAbbreviationCd	ZIPUSAddress/ZIPCd	EINEIN	Primary ActivitiesPrimaryActivitiesTxt	Legal Domicile StateLegalDomicileStateCd	Business Name Line1DirectControllingEntityName/BusinessNameLine1Txt	Entity TypeEntityTypeTxt	Share Of Total IncomeShareOfTotalIncomeAmt	Share Of EOY AssetsShareOfEOYAssetsAmt	OwnershipOwnershipPct	Controlled OrganizationControlledOrganizationInd	Legal Domicile Foreign CountryLegalDomicileForeignCountryCd	Address Line1ForeignAddress/AddressLine1Txt	CityForeignAddress/CityNm	Province Or StateForeignAddress/ProvinceOrStateNm	CountryForeignAddress/CountryCd	Foreign PostalForeignAddress/ForeignPostalCd	Address Line2ForeignAddress/AddressLine2Txt
HHMI REAL ESTATE INC
4000 JONES BRIDGE ROAD	CHEVY CHASE	MD	20815	203967202	INVESTMENT	DE	HHMI	C Corporation	$0	$1,962,561	1	Yes (true)
PLEASANT VALLEY INVESTMENTS LP
				980586696	INVESTMENT		HHMI	C Corporation	$7,966,161	$7,697,236	0.51	Yes (true)	CJ
SPRUGOS MAURITIUS I LTD
					INVESTMENT		HHMI	C Corporation	$0	$0	1	Yes (true)	MP
HHMI CAYMAN I COMPANY
					INVESTMENT		HHMI	C Corporation	-$17,150	$212,619	1	Yes (true)	CJ
CHALKSTREAM KOREA FUND INTERNATIONAL LP
				981248058	INVESTMENT		HHMI	C Corporation	$0	$55,045,115	0.9965	Yes (true)	CJ	27 Hospital Road	George Town	Grand Cayman	CJ	KY19008
LSV ADVANTAGE INTERNATIONAL III LTD
				981300995	INVESTMENT		HHMI	C Corporation	$95,763	$887,075	1	Yes (true)	CJ	89 NEXUS WAY 2/F CAMANA BAY		GRAND CAYMAN	CJ	KY11205
LSV ADVANTAGE INTERNATIONAL III-B LTD
				981315328	INVESTMENT		HHMI	C Corporation	$3,873,064	$22,350,780	1	Yes (true)	CJ	89 NEXUS WAY 2/F CAMANA BAY		GRAND CAYMAN	CJ	KY11205
IRONSIDES PARTNERS SPECIAL SITUATIONS OFFSHORE FUND LTD
					INVESTMENT		HHMI	C Corporation	-$257,701	$155,065	0.58	Yes (true)	CJ	PO BOX 309 UGLAND HOUSE		GRAND CAYMAN	CJ	11104
MARSHALL WACE MANAGED ACCOUNTS PLC-MW EUROPA FUND II
					INVESTMENT		HHMI	C Corporation	$35,522,132	$0	0	Yes (true)	EI
NEWFOUNDLAND TERRANOVA OFFSHORE FUND
					INVESTMENT		HHMI	C Corporation	$45,924,118	$212,572,051	0.93	Yes (true)	CJ	89 NEXUS WAY CAMANA BAY		GRAND CAYMAN	CJ	KY19007
STEYN CAPITAL OFFSHORE HEDGE FUND
					INVESTMENT		HHMI	C Corporation	$893,015	$256,178,443	0.97	Yes (true)	CJ	CASSIA COURT STE 716 10 MARKET ST	CAMANA BAY	GRAND CAYMAN	CJ	KY19006
LSV ADVANTAGE INTERNATIONAL III-C LTD
				981331158	INVESTMENT		HHMI	C Corporation	$1,920,705	$13,312,531	1	Yes (true)	CJ	89 NEXUS WAY 2/F CAMANA BAY		GRAND CAYMAN	CJ	KY11205
STAR ASIA JAPAN SPECIAL SITUATIONS II FEEDER LP
125 GAITHER DR SUITE L	MOUNT LAUREL	NJ	08054	981444101	INVESTMENT		HHMI	C Corporation	$18,443,534	$219,537	1	Yes (true)	CJ
STAR ASIA JAPAN SPECIAL SITUATIONS III FEEDER LP
125 GAITHER DR STE L	MOUNT LAUREL	NJ	08054	611892450	INVESTMENT		HHMI	C Corporation	$2,545,094	$49,764,083	1	Yes (true)	CJ
STAR ASIA JAPAN SPECIAL SITUATIONS IV FEEDER LP
125 GAITHER DR STE L	MOUNT LAUREL	NJ	08054		INVESTMENT		HHMI	C Corporation	$0	$1,089,325	1	Yes (true)	CJ
HARRINGTON AGH CAYMAN LTD
				352596872	INVESTMENT		HHMI	C Corporation	$1,719,357	$0	0	Yes (true)	CJ	PO BOX 10008 WILLOW HOUSe	CRICKET SQUARE	GRAND CAYMAN	CJ		CO SERVICES CAYMAN LIMITED
WILLA A LP
				981380677	INVESTMENT		HHMI	C Corporation	$0	$18,103,875	1	Yes (true)	JE
EJF IB FINANCING LP
					INVESTMENT		HHMI	C Corporation	$579,530	$15,922,883	1	Yes (true)	CJ
ELLINGTON ENHANCED INCOME FUND LTD
					INVESTMENT		HHMI	C Corporation	$12,990,487	$400,173,848	0.5335	Yes (true)	CJ	Walker House 87 Mary Street	George Town	Grand Cayman	CJ	KY11104
HH ELLINGTON FUND LTD
					INVESTMENT		HHMI	C Corporation	$4,058,505	$102,747,544	1	Yes (true)	CJ	Walker House 87 Mary Street	George Town	Grand Cayman	CJ	KY11104
ARJUNA FUND PTE LTD
					INVESTMENT		HHMI	C Corporation	$204,627	$54,385,503	0.55	Yes (true)	SN
PORTSEA FUND SICAV PLC
					INVESTMENT		HHMI	C Corporation	$649,173	$105,965,872	0.5037	Yes (true)	MT
SERENGETI SEGREGATED PORTFOLIO COMPANY LTD PORTFOLIO HH
					INVESTMENT		HHMI	C Corporation	$1,551,891	$51,143,634	0.9959	Yes (true)	CJ	2 BLOOR STREET EAST STE 2700	TORONTO	ONTARIO	CA	M4W1A8

Field	Value	IRS element (for citing)
Receipt Of Int Annts Rnts Rylts	false	ReceiptOfIntAnntsRntsRyltsInd
Gift Grnt Or Cap Contri To Oth Org	Yes (true)	GiftGrntOrCapContriToOthOrgInd
Gift Grnt Cap Contri From Oth Org	false	GiftGrntCapContriFromOthOrgInd
Loans Or Guarantees To Other Org	false	LoansOrGuaranteesToOtherOrgInd
Loans Or Guarantees From Oth Org	false	LoansOrGuaranteesFromOthOrgInd
Asset Sale To Other Org	false	AssetSaleToOtherOrgInd
Asset Purchase From Other Org	false	AssetPurchaseFromOtherOrgInd
Asset Exchange	false	AssetExchangeInd
Rental Of Facilities To Oth Org	false	RentalOfFacilitiesToOthOrgInd
Rental Of Fclts From Oth Org	false	RentalOfFcltsFromOthOrgInd
Perform Of Services For Oth Org	false	PerformOfServicesForOthOrgInd
Perform Of Services By Other Org	false	PerformOfServicesByOtherOrgInd
Sharing Of Facilities	false	SharingOfFacilitiesInd
Paid Employees Sharing	false	PaidEmployeesSharingInd
Reimbursement Paid To Other Org	false	ReimbursementPaidToOtherOrgInd
Reimbursement Paid By Other Org	false	ReimbursementPaidByOtherOrgInd
Transfer To Other Org	false	TransferToOtherOrgInd
Transfer From Other Org	Yes (true)	TransferFromOtherOrgInd

Transactions Related Org TransactionsRelatedOrgGrp (34 entries)

Transaction TypeTransactionTypeTxt	InvolvedInvolvedAmt	Method Of Amount DeterminationMethodOfAmountDeterminationTxt
CERBERUS HH PARTNERS LP
B	$16,217,186	FMV
ECHO STREET GOODCO SELECT II LP
B	$25,000,000	FMV
GEM BVP CO-INV-A LP
B	$100,000	FMV
HH HOLDCO CO-INVESTMENT FUND LP
B	$13,681,981	FMV
CHALKSTREAM KOREA FUND INTERNATIONAL LP
B	$25,000,000	FMV
LSV ADVANTAGE INTERNATIONAL III LTD
B	$480,048	FMV
LSV ADVANTAGE INTERNATIONAL III-B LTD
B	$10,510,971	FMV
LSV ADVANTAGE INTERNATIONAL III-C LTD
B	$12,798,143	FMV
NEWFOUNDLAND TERRANOVA OFFSHORE FUND
B	$25,000,000	FMV
SOLUS OPPROTUNITIES FUND 2 LP
B	$863,133	FMV
STAR ASIA JAPAN SPECIAL SITUATIONS III FEEDER LP
B	$56,994,537	FMV
AGHAP FEEDER LLC
B	$17,432,002	FMV
CERBERUS HH PARTNERS LP
S	$59,870,031	FMV
AROSA MIDSTREAM FUND LP
S	$1,972,102	FMV
COLHM STRATEGIC PARTNERS LP
S	$9,703,846	FMV
CVI HH INVESTMENTS LP
S	$57,500,000	FMV
GEM NPL CO-INV FUND LP
S	$2,241,756	FMV
HARRINGTON AGH CAYMAN LTD
S	$9,046,288	FMV
HH HOLDCO CO-INVESTMENT FUND LP
S	$76,271,611	FMV
HH SG SECONDARY FUND II LP
S	$3,962,681	FMV
HHLF LP
S	$13,941,971	FMV
LUMINUS CREDIT OPPORTUNITIES PIE I LP
S	$6,017,162	FMV
SOLUS OPPORTUNITIES FUND 2 LP
S	$49,551,689	FMV
SPRUGOS MAURITIUS I LTD
S	$955,951	FMV
TOURMALET MATAWIN OFFSHORE FUND VI-A LP
S	$40,114,567	FMV
STAR ASIA JAPAN SPECIAL SITUATIONS II FEEDER LP
S	$22,562,629	FMV
STAR ASIA JAPAN SPECIAL SITUATIONS III FEEDER LP
S	$32,663,598	FMV
STEYN CAPITAL OFFSHORE HEDGE FUND
S	$92,718,153	FMV
WILLA A LP
B	$14,369,093	FMV
ELLINGTON ENHANCED INCOME FUND LTD
B	$390,000,000	FMV
HH ELLINGTON FUND LTD
B	$100,000,000	FMV
ARJUNA FUND PTE LTD
B	$50,000,000	FMV
PORTSEA FUND SICAV PLC
B	$100,000,000	FMV
SERENGETI SEGREGATED PORTFOLIO COMPANY LTD PORTFOLIO HH
B	$50,000,000	FMV