etf overlap · nearly the same fund
VOO vs ITOT overlap
88% of VOO and ITOT is the same money, spread over 501 companies both funds hold.
Holdings as of August 31, 2026 · source: Vanguard (VOO), iShares (ITOT) · How we measured all 1,035 pairs
- same money
- same companies, extra weight
- only in this fund
The companies you would own twice
What only one of them gives you
Where each fund puts its money
VOO and ITOT: what people ask
Is ITOT the same as VOO?
Nearly: 88% of the money in VOO and ITOT sits in the same companies at the same weights, as of August 31, 2026. The other 12% is weight differences, plus 4 names only in VOO and 1,924 only in ITOT.
How much do VOO and ITOT overlap?
88% by weight, as of August 31, 2026: nearly the same fund. 501 companies appear in both funds; they make up 100% of VOO and 89% of ITOT.
Which stocks do VOO and ITOT both hold?
The largest shared positions are NVDA, AAPL, MSFT, AMZN and GOOGL. Ranked by the smaller of the two weights, which is the part you would own twice.
Is it redundant to hold both VOO and ITOT?
Out of every $100 split evenly between them, about $88 (half in each fund) buys identical positions. The rest is exposure only one of the two funds gives you: 4 names only in VOO, 1,924 only in ITOT. Half in each behaves like 50 equally weighted stocks, against 46 for VOO alone and 55 for ITOT alone. Whether that duplication is a problem depends on the mix you want; this is a description, not advice.
How is ETF overlap calculated here?
For every company held by both funds we take the smaller of its two weights and add them up. The weights come from the full holdings files Vanguard and iShares publish, not a top-10 sample, and companies are matched by their ISIN so share classes stay apart. Sector overlap applies the same rule to the issuers' sector labels; "behaves like N equally weighted stocks" is one over the sum of the squared weights.
Weights come from each issuer's published holdings file and are matched company by company on their ISIN. Cash, futures and currency positions are left out. This page describes what the funds hold; it is not investment advice.