etf overlap tool · little overlap
ARKK vs EFA overlap
ARKK and EFA hold no company in common. Still, 49% of their money sits in the same sectors, led by Financials; they part most on Health Care: 28% of ARKK against 10% of EFA.
Holdings as of September 25, 2026 · source: ARK Invest (ARKK), iShares (EFA) · How we measured all 1,431 pairs
- same money
- same companies, extra weight
- only in this fund
Hold ARKK and EFA with other funds or stocks? The free portfolio optimizer opens ARKK and EFA 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.
What only one of them gives you
TSLATESLA INC9.18%
COINCOINBASE GLOBAL INC -CLASS A4.57%No stock in common, 49% in the same sectors
ARKK and EFA: what people ask
How much do ARKK and EFA overlap?
None by holdings, as of September 25, 2026: no company appears in both funds. By sector, 49% of their money sits in the same sectors, led by Financials.
Which stocks do ARKK and EFA both hold?
None. ARKK and EFA have no holding in common.
Is it redundant to hold both ARKK and EFA?
No. Out of every $100 split evenly between them, none buys the same company. Half in each gives you 700 different holdings that behave like 95 equally weighted stocks, against 27 for ARKK alone and 194 for EFA alone. Whether that mix suits you depends on what you want to own; 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 ARK Invest 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.