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 > QQQ vs VIIIX Holdings as of March 31, 2026

QQQ vs VIIIX: Portfolio Overlap

Invesco QQQ Trust, Series 1 vs Vanguard Institutional Index Fund

50.8%
Weighted portfolio overlap
High Overlap

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

QQQ
101 equity holdings
as of March 31, 2026
VIIIX
503 equity holdings
as of March 31, 2026
87 stocks held in common
Overlap View Venn Diagram
50.8% OVERLAP QQQ VIIIX
Overlapping Holdings
10 Top 10 of 87 shared, by overlap contribution
# Stock QQQ VIIIX Overlap%
1
NVDA
 8.69% 7.60% 7.60%
2
AAPL
 7.64% 6.68% 6.68%
3
MSFT
 5.64% 4.93% 4.93%
4
AMZN
 4.59% 3.65% 3.65%
5
GOOGL
 3.43% 3.00% 3.00%
6
AVGO
 3.01% 2.63% 2.63%
7
GOOG
 3.20% 2.40% 2.40%
8
META
 3.46% 2.24% 2.24%
9
TSLA
 3.81% 1.87% 1.87%
10
WMT
 3.44% 0.98% 0.98%
Most Divergent Holdings Stocks held by one fund but absent from the other
Only in QQQ — Invesco QQQ Trust, Series 1
StockWeight
SHOP0.82%
ASML0.66%
MELI0.50%
MRVL0.49%
PDD0.39%
Only in VIIIX — VANGUARD INSTITUTIONAL INDEX FUND
StockWeight
BRK.B1.57%
JPM1.34%
LLY1.31%
XOM1.27%
JNJ1.06%

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

QQQ (Invesco QQQ Trust, Series 1) and VIIIX (Vanguard Institutional Index Fund) share 50.8% portfolio overlap as of their March 31, 2026 filings, across 87 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 QQQ and VIIIX 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 QQQ and VIIIX?

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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