EDGAR Filing Documents for 0000932471-10-002832

Form N-CSRS - Certified Shareholder Report, Semi-Annual:

SEC Accession No. 0000932471-10-002832

Filing Date

2010-08-31

Accepted

2010-08-31 12:12:37

Documents

Period of Report

2010-06-30

Effectiveness Date

2010-08-31

Document Format Files

Seq	Description	Document	Type	Size
1	VANGUARD INSTITUTIONAL INDEX FUNDS	institutionalindexfinal.htm	N-CSRS	3434046
2	CERT 302	institutionalcert302.htm	EX-31	17098
3	CERT 906	institutionalcert906.htm	EX-32	11396
4		institutionalindexfundsx1x2.jpg	GRAPHIC	25200
5		institutionalindexfundsx4x1.jpg	GRAPHIC	2826
6		institutionalindexfundsx7x1.jpg	GRAPHIC	2585
7		institutionalindexfundsx8x1.jpg	GRAPHIC	4045
8		institutionalindexfundsx9x1.jpg	GRAPHIC	9924
9		institutionalindexfundsx32x1.jpg	GRAPHIC	2515
10		institutionaltotalstockx1x1.jpg	GRAPHIC	2601
11		institutionaltotalstockx1x2.jpg	GRAPHIC	24697
12		institutionaltotalstockx2x1.jpg	GRAPHIC	1128
13		institutionaltotalstockx4x1.jpg	GRAPHIC	2960
14		institutionaltotalstockx7x1.jpg	GRAPHIC	2789
15		institutionaltotalstockx8x1.jpg	GRAPHIC	4359
16		institutionaltotalstockx9x1.jpg	GRAPHIC	10776
17		institutionaltotalstockx64x1.jpg	GRAPHIC	2666
18		institutionalindexfundsx1x1.jpg	GRAPHIC	2388
	Complete submission text file	0000932471-10-002832.txt		3607586

Series and Classes/Contracts Information:

Existing
	Status	Name	Ticker Symbol
CIK 0000862084
Series S000002853		Vanguard Institutional Index Fund
Class/Contract C000007825		Institutional Shares	VINIX
Class/Contract C000007826		Institutional Plus Shares	VIIIX
	Status	Name	Ticker Symbol
CIK 0000862084
Series S000002855		Vanguard Institutional Total Stock Market Index Fund
Class/Contract C000007828		Institutional Shares	VITNX
Class/Contract C000007829		Institutional Plus Shares	VITPX

Mailing Address PO BOX 2600 V26 VALLEY FORGE PA 19482

Business Address PO BOX 2600 V26 VALLEY FORGE PA 19482 6106696295

VANGUARD INSTITUTIONAL INDEX FUNDS (Filer) CIK: 0000862084 (see all company filings)