etf overlap tool · moderate overlap
SPY vs VIG overlap
96% of VIG's money sits in companies SPY also holds; 41% of the two funds is the same money, spread over 169 companies both hold.
Holdings as of September 30, 2026 · source: SPDR (SPY), Vanguard (VIG) · How we measured all 1,431 pairs
- same money
- same companies, extra weight
- only in this fund
Hold SPY and VIG with other funds or stocks? The free portfolio optimizer opens SPY and VIG 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
NVDANVIDIA CORP7.85%
AMZNAMAZON.COM INC3.72%
GOOGALPHABET INC CL C2.43%
TSLATESLA INC1.51%
RGLDRoyal Gold Inc0.09%Where each fund puts its money
SPY and VIG: what people ask
How much do SPY and VIG overlap?
41% by weight, as of September 30, 2026: moderate overlap. 169 companies appear in both funds; they make up 45% of SPY and 96% of VIG.
Which stocks do SPY and VIG both hold?
The largest shared positions are MSFT, AAPL, AVGO, LLY and JPM. Ranked by the smaller of the two weights, which is the part you would own twice.
Is it redundant to hold both SPY and VIG?
Out of every $100 split evenly between them, about $41 (half in each fund) buys identical positions. The rest is exposure only one of the two funds gives you: 335 names only in SPY, 164 only in VIG. Half in each behaves like 62 equally weighted stocks, against 44 for SPY alone and 54 for VIG 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 SPDR 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.