EDGAR Filing Documents for 0000932471-06-001223

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

SEC Accession No. 0000932471-06-001223

Filing Date

2006-08-25

Accepted

2006-08-25 15:07:40

Documents

Period of Report

2006-06-30

Effectiveness Date

2006-08-25

Document Format Files

Seq	Description	Document	Type	Size
1	INSTITUTIONAL INDEX SEMI-ANNUAL REPORT	institindexfinal.htm	N-CSRS	5905989
2	GRAPHIC	investpg5.gif	GRAPHIC	3763
3	GRAPHIC	jjbsignature.gif	GRAPHIC	708
4	GRAPHIC	picturebrennan.gif	GRAPHIC	6452
5	GRAPHIC	ship.gif	GRAPHIC	2855
6	GRAPHIC	tbdimg1.jpg	GRAPHIC	5339
7	GRAPHIC	tbdimg2.jpg	GRAPHIC	3208
8	GRAPHIC	tbdimg3.jpg	GRAPHIC	3805
9	GRAPHIC	tbdimg4.jpg	GRAPHIC	7368
10	GRAPHIC	totalretpg6.gif	GRAPHIC	6481
11	GRAPHIC	ttsimg1.jpg	GRAPHIC	3520
12	GRAPHIC	ttsimg2.jpg	GRAPHIC	1691
13	GRAPHIC	ttsimg3.jpg	GRAPHIC	2624
14	GRAPHIC	ttsimg4.jpg	GRAPHIC	4161
15	GRAPHIC	ttsimg5.jpg	GRAPHIC	5331
16	GRAPHIC	ttsimg6.jpg	GRAPHIC	12560
17	302 CERT	cert302a.htm	EX-31	13401
18	906 CERT	cert906a.htm	EX-32	6388
	Complete submission text file	0000932471-06-001223.txt		6026889

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 S000002854		Vanguard Institutional Total Bond Market Index Fund
Class/Contract C000007827		Institutional Shares	VITBX
	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 FUND (Filer) CIK: 0000862084 (see all company filings)