etf overlap tool · little overlap
SOXX vs VWO overlap
0.1% of SOXX and VWO is the same money, spread over 2 companies both funds hold.
Holdings as of September 30, 2026 · source: iShares (SOXX), Vanguard (VWO) · How we measured all 1,431 pairs
- same money
- same companies, extra weight
- only in this fund
Hold SOXX and VWO with other funds or stocks? The free portfolio optimizer opens SOXX and VWO beside the rest of what you own: the companies you hold twice, what the funds cost a year, and where the next deposit should go. No account.
The companies you would own twice
What only one of them gives you
NVDANVIDIA7.98%
MUMICRON TECHNOLOGY7.55%
AVGOBROADCOM INC7.31%
ADIANALOG DEVICES4.49%
Where each fund puts its money
SOXX and VWO: what people ask
How much do SOXX and VWO overlap?
0.1% by weight, as of September 30, 2026: little overlap. 2 companies appear in both funds; they make up 3.8% of SOXX and 0.1% of VWO.
Which stocks do SOXX and VWO both hold?
The largest shared positions are UMC and TSM. Ranked by the smaller of the two weights, which is the part you would own twice.
Is it redundant to hold both SOXX and VWO?
Out of every $100 split evenly between them, about $0 (half in each fund) buys identical positions. The rest is exposure only one of the two funds gives you: 28 names only in SOXX, 5,015 only in VWO. Half in each behaves like 49 equally weighted stocks, against 19 for SOXX alone and 33 for VWO 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.