etf overlap tool · light overlap
VTI vs VB overlap
99% of VB's money sits in companies VTI also holds; 11% of the two funds is the same money, spread over 1,299 companies both hold.
Holdings as of September 30, 2026 · source: Vanguard (VTI), Vanguard (VB) · How we measured all 1,431 pairs
- same money
- same companies, extra weight
- only in this fund
The companies you would own twice
What only one of them gives you
AMZNAmazon.com Inc3.30%Where each fund puts its money
VTI and VB: what people ask
How much do VTI and VB overlap?
11% by weight, as of September 30, 2026: light overlap. 1,299 companies appear in both funds; they make up 11% of VTI and 99% of VB.
Which stocks do VTI and VB both hold?
The largest shared positions are MRNA, NTRA, TWLO, RVMD and ILMN. Ranked by the smaller of the two weights, which is the part you would own twice.
Is it redundant to hold both VTI and VB?
Out of every $100 split evenly between them, about $11 (half in each fund) buys identical positions. The rest is exposure only one of the two funds gives you: 2,217 names only in VTI, 2 only in VB. Half in each behaves like 201 equally weighted stocks, against 55 for VTI alone and 674 for VB 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 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.