ETF and Mutual Fund Analysis

Holdings as of September 30, 2025 (ITOT) and March 31, 2026 (VTSAX)

ETF and Mutual Fund Analysis

Overlap, Comparison, and Diversification for Your Portfolio

Home > Compare > ITOT vs VTSAX Holdings as of September 30, 2025 (ITOT) and March 31, 2026 (VTSAX)

ITOT vs VTSAX: Portfolio Overlap

iShares Core S&P Total U.S. Stock Market ETF vs Vanguard Total Stock Market Index Fund

87.7%
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.

ITOT
2484 equity holdings
as of September 30, 2025
VTSAX
3506 equity holdings
as of March 31, 2026
2278 stocks held in common
Overlap View Venn Diagram
87.7% OVERLAP ITOT VTSAX
Overlapping Holdings
10 Top 10 of 2278 shared, by overlap contribution
# Stock ITOT VTSAX Overlap%
1
NVDA
 7.02% 6.44% 6.44%
2
AAPL
 5.83% 5.96% 5.83%
3
MSFT
 5.94% 4.40% 4.40%
4
AMZN
 3.29% 3.22% 3.22%
5
AVGO
 2.39% 2.35% 2.35%
6
GOOGL
 2.18% 2.68% 2.18%
7
META
 2.46% 2.00% 2.00%
8
GOOG
 1.75% 2.12% 1.75%
9
TSLA
 1.93% 1.67% 1.67%
10
BRK.B
 1.42% 1.37% 1.37%
Most Divergent Holdings Stocks held by one fund but absent from the other
Only in ITOT — iShares Core S&P Total U.S. Stock Market ETF
StockWeight
Linde PLC0.34%
Accenture PLC0.24%
Eaton Corp PLC0.22%
Medtronic PLC0.19%
Chubb Ltd0.16%
Only in VTSAX — VANGUARD TOTAL STOCK MARKET INDEX FUND
StockWeight
LIN0.37%
ETN0.22%
ACN0.20%
CB0.18%
MDT0.18%

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Frequently Asked Questions (FAQs)
What is the portfolio overlap between ITOT and VTSAX?

ITOT (iShares Core S&P Total U.S. Stock Market ETF) and VTSAX (Vanguard Total Stock Market Index Fund) share 87.7% portfolio overlap as of ITOT's September 30, 2025 filing and VTSAX's March 31, 2026 filing, across 2278 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 ITOT and VTSAX 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 ITOT and VTSAX?

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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