ETF and Mutual Fund Analysis

Holdings as of May 31, 2026 (FXAIX) and September 30, 2025 (ITOT)

ETF and Mutual Fund Analysis

Overlap, Comparison, and Diversification for Your Portfolio

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

FXAIX vs ITOT: Portfolio Overlap

Fidelity 500 Index Fund vs iShares Core S&P Total U.S. Stock Market ETF

82.7%
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.

FXAIX
503 equity holdings
as of May 31, 2026
ITOT
2484 equity holdings
as of September 30, 2025
500 stocks held in common
Overlap View Venn Diagram
82.7% OVERLAP FXAIX ITOT
Overlapping Holdings
10 Top 10 of 500 shared, by overlap contribution
# Stock FXAIX ITOT Overlap%
1
NVDA
 7.90% 7.02% 7.02%
2
AAPL
 7.05% 5.83% 5.83%
3
MSFT
 5.15% 5.94% 5.15%
4
AMZN
 4.07% 3.29% 3.29%
5
AVGO
 3.26% 2.39% 2.39%
6
GOOGL
 3.41% 2.18% 2.18%
7
META
 2.13% 2.46% 2.13%
8
TSLA
 1.89% 1.93% 1.89%
9
GOOG
 2.71% 1.75% 1.75%
10
BRK.B
 1.34% 1.42% 1.34%
Most Divergent Holdings Stocks held by one fund but absent from the other
Only in FXAIX — Fidelity 500 Index Fund
StockWeight
Carnival Corp Ltd0.06%
Q0.05%
Amcor PLC0.03%
Only in ITOT — iShares Core S&P Total U.S. Stock Market ETF
StockWeight
RBLX0.14%
MSTR0.13%
SNOW0.12%
MRVL0.11%
NET0.10%

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

FXAIX (Fidelity 500 Index Fund) and ITOT (iShares Core S&P Total U.S. Stock Market ETF) share 82.7% portfolio overlap as of FXAIX's May 31, 2026 filing and ITOT's September 30, 2025 filing, across 500 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 FXAIX and ITOT 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 FXAIX and ITOT?

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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