etf overlap · light overlap
VB vs ITOT overlap
11% of VB and ITOT is the same money, spread over 1,277 companies both funds hold.
Holdings as of September 30, 2026 · source: Vanguard (VB), 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
AMZNAMAZON.COM INC3.35%Where each fund puts its money
VB and ITOT: what people ask
How much do VB and ITOT overlap?
11% by weight, as of September 30, 2026: light overlap. 1,277 companies appear in both funds; they make up 98% of VB and 11% of ITOT.
Which stocks do VB and ITOT both hold?
The largest shared positions are MRNA, NTRA, P, TWLO and ILMN. Ranked by the smaller of the two weights, which is the part you would own twice.
Is it redundant to hold both VB and ITOT?
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: 24 names only in VB, 1,148 only in ITOT. Half in each behaves like 199 equally weighted stocks, against 674 for VB 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.