etf overlap tool · heavy overlap
VOO vs MGK overlap
99% of MGK's money sits in companies VOO also holds; 52% of the two funds is the same money, spread over 50 companies both hold.
Holdings as of September 30, 2026 · source: Vanguard (VOO), Vanguard (MGK) · How we measured all 1,431 pairs
- same money
- same companies, extra weight
- only in this fund
Hold VOO and MGK with other funds or stocks? The free portfolio optimizer opens VOO and MGK 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
Where each fund puts its money
VOO and MGK: what people ask
How much do VOO and MGK overlap?
52% by weight, as of September 30, 2026: heavy overlap. 50 companies appear in both funds; they make up 52% of VOO and 99% of MGK.
Which stocks do VOO and MGK both hold?
The largest shared positions are NVDA, AAPL, MSFT, AMZN and GOOGL. Ranked by the smaller of the two weights, which is the part you would own twice.
Is it redundant to hold both VOO and MGK?
Out of every $100 split evenly between them, about $52 (half in each fund) buys identical positions. The rest is exposure only one of the two funds gives you: 455 names only in VOO, 2 only in MGK. Half in each behaves like 26 equally weighted stocks, against 43 for VOO alone and 17 for MGK 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 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.