ETF and Mutual Fund Analysis

Holdings as of March 31, 2026

ETF and Mutual Fund Analysis

Overlap, Comparison, and Diversification for Your Portfolio

Home > Compare > VIIIX vs VTI Holdings as of March 31, 2026

VIIIX vs VTI: Portfolio Overlap

Vanguard Institutional Index Fund vs Vanguard Total Stock Market Index Fund

88.4%
Weighted portfolio overlap
Very High Overlap

The two portfolios are structurally near-identical: most of the weight sits in the same stocks, so holding both concentrates rather than spreads capital. The tier describes what the data shows, not what to do about it.

VIIIX
503 equity holdings
as of March 31, 2026
VTI
3506 equity holdings
as of March 31, 2026
501 stocks held in common
Overlap View Venn Diagram
88.4% OVERLAP VIIIX VTI
Overlapping Holdings
10 Top 10 of 501 shared, by overlap contribution
# Stock VIIIX VTI Overlap%
1
NVDA
 7.60% 6.44% 6.44%
2
AAPL
 6.68% 5.96% 5.96%
3
MSFT
 4.93% 4.40% 4.40%
4
AMZN
 3.65% 3.22% 3.22%
5
GOOGL
 3.00% 2.68% 2.68%
6
AVGO
 2.63% 2.35% 2.35%
7
GOOG
 2.40% 2.12% 2.12%
8
META
 2.24% 2.00% 2.00%
9
TSLA
 1.87% 1.67% 1.67%
10
BRK.B
 1.57% 1.37% 1.37%
Most Divergent Holdings Stocks held by one fund but absent from the other
Only in VIIIX — VANGUARD INSTITUTIONAL INDEX FUND
StockWeight
NXPI0.09%
AMCR0.03%
Only in VTI — VANGUARD TOTAL STOCK MARKET INDEX FUND
StockWeight
MRVL0.14%
NET0.10%
LNG0.09%
SNOW0.08%
ALNY0.07%

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Frequently Asked Questions (FAQs)
What is the portfolio overlap between VIIIX and VTI?

VIIIX (Vanguard Institutional Index Fund) and VTI (Vanguard Total Stock Market Index Fund) share 88.4% portfolio overlap as of their March 31, 2026 filings, across 501 common stocks. Overlap is the sum of the smaller weight of each shared stock, so it reads as the share of a dollar that lands on the same companies in both funds.

Do VIIIX and VTI invest in the same stocks?

Almost entirely. These funds hold nearly identical portfolios and offer little differentiation between them.

What are the top stocks held by both VIIIX and VTI?

The most prominent shared holdings (by combined weight) are: NVDA, AAPL, MSFT. See the full common-holdings table on this page for weights in each fund.

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