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 VUG Holdings as of March 31, 2026

VIIIX vs VUG: Portfolio Overlap

Vanguard Institutional Index Fund vs Vanguard Growth Index Fund

55.3%
Weighted portfolio overlap
High Overlap

The two funds are running highly redundant strategies — the same market exposure is paid for through two expense ratios.

VIIIX
503 equity holdings
as of March 31, 2026
VUG
153 equity holdings
as of March 31, 2026
125 stocks held in common
Overlap View Venn Diagram
55.3% OVERLAP VIIIX VUG
Overlapping Holdings
10 Top 10 of 125 shared, by overlap contribution
# Stock VIIIX VUG Overlap%
1
NVDA
 7.60% 13.33% 7.60%
2
AAPL
 6.68% 12.33% 6.68%
3
MSFT
 4.93% 9.10% 4.93%
4
AMZN
 3.65% 4.60% 3.65%
5
GOOGL
 3.00% 5.54% 3.00%
6
AVGO
 2.63% 4.41% 2.63%
7
GOOG
 2.40% 4.39% 2.40%
8
META
 2.24% 4.15% 2.24%
9
TSLA
 1.87% 3.48% 1.87%
10
LLY
 1.31% 2.60% 1.31%
Most Divergent Holdings Stocks held by one fund but absent from the other
Only in VIIIX — VANGUARD INSTITUTIONAL INDEX FUND
StockWeight
BRK.B1.57%
JPM1.34%
XOM1.27%
JNJ1.06%
WMT0.98%
Only in VUG — VANGUARD GROWTH INDEX FUND
StockWeight
MRVL0.31%
NET0.22%
SNOW0.18%
ALNY0.16%
WCN0.15%

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

VIIIX (Vanguard Institutional Index Fund) and VUG (Vanguard Growth Index Fund) share 55.3% portfolio overlap as of their March 31, 2026 filings, across 125 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 VUG invest in the same stocks?

Largely yes. A substantial portion of both portfolios consists of the same stocks, leaving limited room for differentiation.

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

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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