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 > SPYM vs VOO Holdings as of March 31, 2026

SPYM vs VOO: Portfolio Overlap

State Street(R) SPDR(R) Portfolio S&P 500(R) ETF vs Vanguard 500 Index Fund

97.0%
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.

SPYM
503 equity holdings
as of March 31, 2026
VOO
504 equity holdings
as of March 31, 2026
476 stocks held in common
Overlap View Venn Diagram
97.0% OVERLAP SPYM VOO
Overlapping Holdings
10 Top 10 of 476 shared, by overlap contribution
# Stock SPYM VOO Overlap%
1
NVDA
 7.58% 7.59% 7.58%
2
AAPL
 6.67% 6.68% 6.67%
3
MSFT
 4.92% 4.93% 4.92%
4
AMZN
 3.64% 3.65% 3.64%
5
GOOGL
 3.00% 3.00% 3.00%
6
AVGO
 2.63% 2.63% 2.63%
7
GOOG
 2.40% 2.40% 2.40%
8
META
 2.24% 2.24% 2.24%
9
TSLA
 1.87% 1.87% 1.87%
10
BRK.B
 1.57% 1.57% 1.57%
Most Divergent Holdings Stocks held by one fund but absent from the other
Only in SPYM — State Street(R) SPDR(R) Portfolio S&P 500(R) ETF
StockWeight
Linde PLC0.41%
Eaton Corp PLC0.25%
Accenture PLC0.22%
Chubb Ltd0.21%
Medtronic PLC0.20%
Only in VOO — VANGUARD 500 INDEX FUND
StockWeight
LIN0.41%
ETN0.25%
ACN0.22%
CB0.21%
MDT0.20%

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Frequently Asked Questions (FAQs)
What is the portfolio overlap between SPYM and VOO?

SPYM (State Street(R) SPDR(R) Portfolio S&P 500(R) ETF) and VOO (Vanguard 500 Index Fund) share 97.0% portfolio overlap as of their March 31, 2026 filings, across 476 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 SPYM and VOO 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 SPYM and VOO?

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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