etf overlap · light overlap
VGT vs DIA overlap
15% of VGT and DIA is the same money, spread over 6 companies both funds hold.
Holdings as of August 31, 2026 · source: Vanguard (VGT), SPDR (DIA)
- 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
VGT and DIA: what people ask
How much do VGT and DIA overlap?
15% by weight, as of August 31, 2026: light overlap. 6 companies appear in both funds; they make up 48% of VGT and 19% of DIA.
Which stocks do VGT and DIA both hold?
The largest shared positions are MSFT, AAPL, NVDA, CSCO and IBM. Ranked by the smaller of the two weights, which is the part you would own twice.
Is it redundant to hold both VGT and DIA?
Out of every $100 split evenly between them, about $15 (half in each fund) buys identical positions. The rest is exposure only one of the two funds gives you: 312 names only in VGT, 24 only in DIA. 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 SPDR publish, not a top-10 sample, and companies are matched by their ISIN so share classes stay apart.
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.