etf overlap · little overlap
ARKK vs IEFA overlap
ARKK and IEFA 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 9.5% of IEFA.
Holdings as of September 25, 2026 · source: ARK Invest (ARKK), iShares (IEFA) · How we measured all 1,035 pairs
- same money
- same companies, extra weight
- only in this fund
What only one of them gives you
No stock in common, 49% in the same sectors
ARKK and IEFA: what people ask
How much do ARKK and IEFA 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 IEFA both hold?
None. ARKK and IEFA have no holding in common.
Is it redundant to hold both ARKK and IEFA?
No. Out of every $100 split evenly between them, none buys the same company. Half in each gives you 2,664 different holdings that behave like 98 equally weighted stocks, against 27 for ARKK alone and 261 for IEFA 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.