etf overlap · little overlap
IWM vs VT overlap
1.5% of IWM and VT is the same money, spread over 531 companies both funds hold.
Holdings as of September 24, 2026 · source: iShares (IWM), Vanguard (VT) · How we measured all 1,035 pairs
- same money
- same companies, extra weight
- only in this fund
What only one of them gives you
AMZNAmazon.com Inc2.05%Where each fund puts its money
IWM and VT: what people ask
How much do IWM and VT overlap?
1.5% by weight, as of September 24, 2026: little overlap. 531 companies appear in both funds; they make up 64% of IWM and 1.5% of VT.
Which stocks do IWM and VT both hold?
The largest shared positions are TWST, MOG-A, UMBF, TXG and FROG. Ranked by the smaller of the two weights, which is the part you would own twice.
Is it redundant to hold both IWM and VT?
Out of every $100 split evenly between them, about $2 (half in each fund) buys identical positions. The rest is exposure only one of the two funds gives you: 1,444 names only in IWM, 9,624 only in VT. Half in each behaves like 442 equally weighted stocks, against 842 for IWM alone and 128 for VT 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 iShares and 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.