etf overlap · little overlap
VB vs IWF overlap
3.9% of VB and IWF is the same money, spread over 186 companies both funds hold.
Holdings as of September 30, 2026 · source: Vanguard (VB), iShares (IWF) · 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
VB and IWF: what people ask
How much do VB and IWF overlap?
3.9% by weight, as of September 30, 2026: little overlap. 186 companies appear in both funds; they make up 26% of VB and 3.9% of IWF.
Which stocks do VB and IWF both hold?
The largest shared positions are NTRA, P, RVMD, EME and JBL. Ranked by the smaller of the two weights, which is the part you would own twice.
Is it redundant to hold both VB and IWF?
Out of every $100 split evenly between them, about $4 (half in each fund) buys identical positions. The rest is exposure only one of the two funds gives you: 1,115 names only in VB, 185 only in IWF. Half in each behaves like 79 equally weighted stocks, against 674 for VB alone and 20 for IWF 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.