VANGUARD INSTITUTIONAL INDEX FUND

S000002853VANGUARD INSTITUTIONAL INDEX FUNDSCIK 0000862084

Share classes

2 classes of this one portfolio · 0 exchange-listed

Class ID	Symbol	Status	Security in the master	Type
C000007826	VIIIX	NOT_LISTED	not exchange-listed	—
C000007825	VINIX	NOT_LISTED	not exchange-listed	—

The share-class bridge is a snapshot, not history. The SEC's fund share-class file says what each class trades as today, not what it traded as at a past report date. A fund that changed ticker or converted from a mutual fund resolves to its present-day symbol for every historical month shown.

Share classes

Report period

1 period filed. Holdings below describe the selected month only.

2026-03-31

Filing

NPORT-P · filed 2026-05-28

Report date: 2026-03-31
Net assets: $315,459,544,697.46
Total assets: $315,473,072,101.37
Total liabilities: $13,527,403.91
Assets invested: $0
Cash not reported in C or D: $489,618.37
Amendment: No
Accession: 0000862084-26-000094

By asset category

N-PORT Item C.4.a

ECEquity - common$314.61B99.8%

STIVShort-term investment veh…$691.15M0.2%

DEDerivative - equity-$238.6K-0.0%

By asset category

By issuer category

N-PORT Item C.4.b

CORPCorporate$315.30B100.0%

OTHEROther; the filer describe…-$238.6K-0.0%

By issuer category

By investment country

as filed

USUS$315.30B100.0%

N/AN/A-$238.6K-0.0%

By country

Classification look-through

Positions resolved to the master through ISIN, then rolled up through the taxonomy. 97.9% of reported value reaches a classification.

Equity · Information Technology(83)$124.96B39.6%

Equity · Financials(75)$39.09B12.4%

Equity · Consumer Discretionary(53)$31.59B10.0%

Equity · Health Care(58)$29.65B9.4%

Equity · Industrials(69)$22.91B7.3%

Equity · Consumer Staples(32)$15.05B4.8%

Equity · Communication Services(16)$14.69B4.7%

Equity · Energy(21)$8.63B2.7%

Equity · Utilities(31)$8.01B2.5%

Equity · Materials(25)$6.49B2.1%

Not resolved to the master(21)$6.28B2.0%

Equity · Real Estate(31)$6.14B1.9%

Equity(1)$1.45B0.5%

Resolved, not yet classified(1)$354.84M0.1%

Classification covers part of the master. 5,771 of 13,106 active securities are classified. Anything unclassified is shown as its own band rather than dropped, so a look-through total that falls short of 100% is telling you about coverage, not about the fund.

Percentages are of the reported value of positions above ($315.30B), not of the fund’s net assets ($315.46B). The two differ by cash, derivatives filed with no market value, and rounding.

Classification look-through

Holdings

517 positions in this filing

Issuer nameAsset categoryIssuer category

Holdings

Issuer↕	In master	CUSIP / ISIN	Asset	Balance↕	Value↕	Weight▼	Country
Cognizant Technology Solutions Corp COGNIZANT TECH-A	CTSH	192446102 US1924461023	EC CORP	2,694,285 NS	$165.29M	0.052%	US
Waters Corp WATERS CORP	WAT	941848103 US9418481035	EC CORP	552,608 NS	$164.57M	0.052%	US
Xylem Inc/NY XYLEM INC	XYL	98419M100 US98419M1009	EC CORP	1,373,299 NS	$164.11M	0.052%	US
IQVIA Holdings Inc IQVIA HOLDINGS I	IQV	46266C105 US46266C1053	EC CORP	955,485 NS	$162.95M	0.052%	US
Tapestry Inc TAPESTRY INC	TPR	876030107 US8760301072	EC CORP	1,141,072 NS	$161.02M	0.051%	US
Ingersoll Rand Inc INGERSOLL-RAND I	IR	45687V106 US45687V1061	EC CORP	2,005,520 NS	$160.68M	0.051%	US
Teledyne Technologies Inc TELEDYNE TECH	TDY	879360105 US8793601050	EC CORP	264,924 NS	$160.28M	0.051%	US
PPL Corp PPL CORP	PPL	69351T106 US69351T1060	EC CORP	4,171,022 NS	$159.33M	0.051%	US
CenterPoint Energy Inc CENTERPOINT ENER	CNP	15189T107 US15189T1079	EC CORP	3,681,976 NS	$158.91M	0.050%	US
Edison International EDISON INTL	EIX	281020107 US2810201077	EC CORP	2,169,496 NS	$158.76M	0.050%	US
Dover Corp DOVER CORP	DOV	260003108 US2600031080	EC CORP	759,959 NS	$158.41M	0.050%	US
Jabil Inc JABIL INC	JBL	466313103 US4663131039	EC CORP	594,904 NS	$158.02M	0.050%	US
Extra Space Storage Inc EXTRA SPACE STOR	EXR	30225T102 US30225T1025	EC CORP	1,196,690 NS	$156.92M	0.050%	US
Willis Towers Watson PLC WILLIS TOWERS WA	WTW	G96629103 IE00BDB6Q211	EC CORP	536,597 NS	$155.99M	0.049%	US
Workday Inc WORKDAY INC-A	WDAY	98138H101 US98138H1014	EC CORP	1,199,833 NS	$155.88M	0.049%	US
Texas Pacific Land Corp TEXAS PACIFIC LA	TPL	88262P102 US88262P1021	EC CORP	326,708 NS	$155.04M	0.049%	US
Expedia Group Inc EXPEDIA GROUP IN	EXPE	30212P303 US30212P3038	EC CORP	659,741 NS	$152.33M	0.048%	US
VICI Properties Inc VICI PROPERTIES	VICI	925652109 US9256521090	EC CORP	5,554,261 NS	$151.74M	0.048%	US
Biogen Inc BIOGEN INC	BIIB	09062X103 US09062X1037	EC CORP	827,362 NS	$151.68M	0.048%	US
Coterra Energy Inc COTERRA ENERGY I	—	127097103 US1270971039	EC CORP	4,281,034 NS	$150.44M	0.048%	US
American Water Works Co Inc AMERICAN WATER W	AWK	030420103 US0304201033	EC CORP	1,099,836 NS	$149.68M	0.047%	US
Verisk Analytics Inc VERISK ANALYTI	VRSK	92345Y106 US92345Y1064	EC CORP	785,947 NS	$149.13M	0.047%	US
FirstEnergy Corp FIRSTENERGY CORP	FE	337932107 US3379321074	EC CORP	2,930,142 NS	$148.44M	0.047%	US
Expand Energy Corp EXPAND ENERGY CO	EXE	165167735 US1651677353	EC CORP	1,342,547 NS	$147.38M	0.047%	US
Dollar General Corp DOLLAR GENERAL C	DG	256677105 US2566771059	EC CORP	1,240,549 NS	$147.29M	0.047%	US
Hubbell Inc HUBBELL INC	HUBB	443510607 US4435106079	EC CORP	299,517 NS	$146.98M	0.047%	US
Northern Trust Corp NORTHERN TRUST	NTRS	665859104 US6658591044	EC CORP	1,051,781 NS	$146.80M	0.047%	US
Eversource Energy EVERSOURCE ENERG	ES	30040W108 US30040W1080	EC CORP	2,115,147 NS	$146.54M	0.046%	US
Mettler-Toledo International Inc METTLER-TOLEDO	MTD	592688105 US5926881054	EC CORP	114,714 NS	$144.68M	0.046%	US
Citizens Financial Group Inc CITIZENS FINANCI	CFG	174610105 US1746101054	EC CORP	2,398,292 NS	$143.83M	0.046%	US
Fair Isaac Corp FAIR ISAAC CORP	FICO	303250104 US3032501047	EC CORP	133,663 NS	$142.69M	0.045%	US
Raymond James Financial Inc RAYMOND JAMES	RJF	754730109 US7547301090	EC CORP	980,299 NS	$141.94M	0.045%	US
Steel Dynamics Inc STEEL DYNAMICS	STLD	858119100 US8581191009	EC CORP	773,448 NS	$139.22M	0.044%	US
Cincinnati Financial Corp CINCINNATI FIN	CINF	172062101 US1720621010	EC CORP	879,423 NS	$138.38M	0.044%	US
ON Semiconductor Corp ON SEMICONDUCTOR	ON	682189105 US6821891057	EC CORP	2,223,625 NS	$137.69M	0.044%	US
Fidelity National Information Services Inc FIDELITY NATIONA	FIS	31620M106 US31620M1062	EC CORP	2,918,900 NS	$136.93M	0.043%	US
Dexcom Inc DEXCOM	DXCM	252131107 US2521311074	EC CORP	2,172,150 NS	$136.41M	0.043%	US
Qnity Electronics Inc QNITY ELECTRONIC	Q	74743L100 US74743L1008	EC CORP	1,180,140 NS	$136.16M	0.043%	US
Live Nation Entertainment Inc LIVE NATION ENTE	LYV	538034109 US5380341090	EC CORP	889,631 NS	$135.68M	0.043%	US
PPG Industries Inc PPG INDS INC	PPG	693506107 US6935061076	EC CORP	1,264,559 NS	$135.16M	0.043%	US
Tractor Supply Co TRACTOR SUPPLY	TSCO	892356106 US8923561067	EC CORP	2,978,995 NS	$134.95M	0.043%	US
CMS Energy Corp CMS ENERGY CORP	CMS	125896100 US1258961002	EC CORP	1,728,714 NS	$134.11M	0.043%	US
Omnicom Group Inc OMNICOM GROUP	OMC	681919106 US6819191064	EC CORP	1,774,986 NS	$133.67M	0.042%	US
Synchrony Financial SYNCHRONY FINANC	SYF	87165B103 US87165B1035	EC CORP	1,961,232 NS	$133.40M	0.042%	US
Ulta Beauty Inc ULTA BEAUTY INC	ULTA	90384S303 US90384S3031	EC CORP	250,314 NS	$130.84M	0.041%	US
AvalonBay Communities Inc AVALONBAY COMMUN	AVB	053484101 US0534841012	EC CORP	797,861 NS	$130.33M	0.041%	US
Regions Financial Corp REGIONS FINANCIA	RF	7591EP100 US7591EP1005	EC CORP	4,895,994 NS	$127.88M	0.041%	US
Darden Restaurants Inc DARDEN RESTAURAN	DRI	237194105 US2371941053	EC CORP	649,538 NS	$127.34M	0.040%	US
PulteGroup Inc PULTEGROUP INC	PHM	745867101 US7458671010	EC CORP	1,082,534 NS	$127.32M	0.040%	US
Ares Management Corp ARES MANAGEM- A	ARES	03990B101 US03990B1017	EC CORP	1,162,503 NS	$126.83M	0.040%	US

Issuer↕

In master

CUSIP / ISIN

Asset

Balance↕

Value↕

Weight▼

Country

Cognizant Technology Solutions Corp

COGNIZANT TECH-A

CTSH

192446102

US1924461023

CORP

2,694,285 NS

$165.29M

0.052%

Waters Corp

WATERS CORP

WAT

941848103

US9418481035

CORP

552,608 NS

$164.57M

0.052%

Xylem Inc/NY

XYLEM INC

XYL

98419M100

US98419M1009

CORP

1,373,299 NS

$164.11M

0.052%

IQVIA Holdings Inc

IQVIA HOLDINGS I

IQV

46266C105

US46266C1053

CORP

955,485 NS

$162.95M

0.052%

Tapestry Inc

TAPESTRY INC

TPR

876030107

US8760301072

CORP

1,141,072 NS

$161.02M

0.051%

Ingersoll Rand Inc

INGERSOLL-RAND I

45687V106

US45687V1061

CORP

2,005,520 NS

$160.68M

0.051%

Teledyne Technologies Inc

TELEDYNE TECH

TDY

879360105

US8793601050

CORP

264,924 NS

$160.28M

0.051%

PPL Corp

PPL CORP

PPL

69351T106

US69351T1060

CORP

4,171,022 NS

$159.33M

0.051%

CenterPoint Energy Inc

CENTERPOINT ENER

CNP

15189T107

US15189T1079

CORP

3,681,976 NS

$158.91M

0.050%

Edison International

EDISON INTL

EIX

281020107

US2810201077

CORP

2,169,496 NS

$158.76M

0.050%

Dover Corp

DOVER CORP

DOV

260003108

US2600031080

CORP

759,959 NS

$158.41M

0.050%

Jabil Inc

JABIL INC

JBL

466313103

US4663131039

CORP

594,904 NS

$158.02M

0.050%

Extra Space Storage Inc

EXTRA SPACE STOR

EXR

30225T102

US30225T1025

CORP

1,196,690 NS

$156.92M

0.050%

Willis Towers Watson PLC

WILLIS TOWERS WA

WTW

G96629103

IE00BDB6Q211

CORP

536,597 NS

$155.99M

0.049%

Workday Inc

WORKDAY INC-A

WDAY

98138H101

US98138H1014

CORP

1,199,833 NS

$155.88M

0.049%

Texas Pacific Land Corp

TEXAS PACIFIC LA

TPL

88262P102

US88262P1021

CORP

326,708 NS

$155.04M

0.049%

Expedia Group Inc

EXPEDIA GROUP IN

EXPE

30212P303

US30212P3038

CORP

659,741 NS

$152.33M

0.048%

VICI Properties Inc

VICI PROPERTIES

VICI

925652109

US9256521090

CORP

5,554,261 NS

$151.74M

0.048%

Biogen Inc

BIOGEN INC

BIIB

09062X103

US09062X1037

CORP

827,362 NS

$151.68M

0.048%

Coterra Energy Inc

COTERRA ENERGY I

—

127097103

US1270971039

CORP

4,281,034 NS

$150.44M

0.048%

American Water Works Co Inc

AMERICAN WATER W

AWK

030420103

US0304201033

CORP

1,099,836 NS

$149.68M

0.047%

Verisk Analytics Inc

VERISK ANALYTI

VRSK

92345Y106

US92345Y1064

CORP

785,947 NS

$149.13M

0.047%

FirstEnergy Corp

FIRSTENERGY CORP

337932107

US3379321074

CORP

2,930,142 NS

$148.44M

0.047%

Expand Energy Corp

EXPAND ENERGY CO

EXE

165167735

US1651677353

CORP

1,342,547 NS

$147.38M

0.047%

Dollar General Corp

DOLLAR GENERAL C

256677105

US2566771059

CORP

1,240,549 NS

$147.29M

0.047%

Hubbell Inc

HUBBELL INC

HUBB

443510607

US4435106079

CORP

299,517 NS

$146.98M

0.047%

Northern Trust Corp

NORTHERN TRUST

NTRS

665859104

US6658591044

CORP

1,051,781 NS

$146.80M

0.047%

Eversource Energy

EVERSOURCE ENERG

30040W108

US30040W1080

CORP

2,115,147 NS

$146.54M

0.046%

Mettler-Toledo International Inc

METTLER-TOLEDO

MTD

592688105

US5926881054

CORP

114,714 NS

$144.68M

0.046%

Citizens Financial Group Inc

CITIZENS FINANCI

CFG

174610105

US1746101054

CORP

2,398,292 NS

$143.83M

0.046%

Fair Isaac Corp

FAIR ISAAC CORP

FICO

303250104

US3032501047

CORP

133,663 NS

$142.69M

0.045%

Raymond James Financial Inc

RAYMOND JAMES

RJF

754730109

US7547301090

CORP

980,299 NS

$141.94M

0.045%

Steel Dynamics Inc

STEEL DYNAMICS

STLD

858119100

US8581191009

CORP

773,448 NS

$139.22M

0.044%

Cincinnati Financial Corp

CINCINNATI FIN

CINF

172062101

US1720621010

CORP

879,423 NS

$138.38M

0.044%

ON Semiconductor Corp

ON SEMICONDUCTOR

682189105

US6821891057

CORP

2,223,625 NS

$137.69M

0.044%

Fidelity National Information Services Inc

FIDELITY NATIONA

FIS

31620M106

US31620M1062

CORP

2,918,900 NS

$136.93M

0.043%

Dexcom Inc

DEXCOM

DXCM

252131107

US2521311074

CORP

2,172,150 NS

$136.41M

0.043%

Qnity Electronics Inc

QNITY ELECTRONIC

74743L100

US74743L1008

CORP

1,180,140 NS

$136.16M

0.043%

Live Nation Entertainment Inc

LIVE NATION ENTE

LYV

538034109

US5380341090

CORP

889,631 NS

$135.68M

0.043%

PPG Industries Inc

PPG INDS INC

PPG

693506107

US6935061076

CORP

1,264,559 NS

$135.16M

0.043%

Tractor Supply Co

TRACTOR SUPPLY

TSCO

892356106

US8923561067

CORP

2,978,995 NS

$134.95M

0.043%

CMS Energy Corp

CMS ENERGY CORP

CMS

125896100

US1258961002

CORP

1,728,714 NS

$134.11M

0.043%

Omnicom Group Inc

OMNICOM GROUP

OMC

681919106

US6819191064

CORP

1,774,986 NS

$133.67M

0.042%

Synchrony Financial

SYNCHRONY FINANC

SYF

87165B103

US87165B1035

CORP

1,961,232 NS

$133.40M

0.042%

Ulta Beauty Inc

ULTA BEAUTY INC

ULTA

90384S303

US90384S3031

CORP

250,314 NS

$130.84M

0.041%

AvalonBay Communities Inc

AVALONBAY COMMUN

AVB

053484101

US0534841012

CORP

797,861 NS

$130.33M

0.041%

Regions Financial Corp

REGIONS FINANCIA

7591EP100

US7591EP1005

CORP

4,895,994 NS

$127.88M

0.041%

Darden Restaurants Inc

DARDEN RESTAURAN

DRI

237194105

US2371941053

CORP

649,538 NS

$127.34M

0.040%

PulteGroup Inc

PULTEGROUP INC

PHM

745867101

US7458671010

CORP

1,082,534 NS

$127.32M

0.040%

Ares Management Corp

ARES MANAGEM- A

ARES

03990B101

US03990B1017

CORP

1,162,503 NS

$126.83M

0.040%