etf overlap tool · light overlap
SOXX vs IWDA overlap
89% of SOXX's money sits in companies IWDA also holds; 12% of the two funds is the same money, spread over 21 companies both hold.
Holdings as of October 16, 2026 · source: iShares (SOXX), iShares (IWDA) · How we measured all 1,431 pairs
- same money
- same companies, extra weight
- only in this fund
Hold SOXX and IWDA with other funds or stocks? The free portfolio optimizer opens SOXX and IWDA 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
AMZNAMAZON.COM INC2.66%Where each fund puts its money
SOXX and IWDA: what people ask
How much do SOXX and IWDA overlap?
12% by weight, as of October 16, 2026: light overlap. 21 companies appear in both funds; they make up 89% of SOXX and 12% of IWDA.
Which stocks do SOXX and IWDA both hold?
The largest shared positions are NVDA, AVGO, MU, AMD and INTC. Ranked by the smaller of the two weights, which is the part you would own twice.
Is it redundant to hold both SOXX and IWDA?
Out of every $100 split evenly between them, about $12 (half in each fund) buys identical positions. The rest is exposure only one of the two funds gives you: 9 names only in SOXX, 1,227 only in IWDA. Half in each behaves like 50 equally weighted stocks, against 19 for SOXX alone and 85 for IWDA alone. Whether that duplication is a problem depends on the mix you want; this is a description, not advice.
What is IWDA, next to SOXX?
IWDA is iShares Core MSCI World UCITS ETF (ISIN IE00B4L5Y983), an Irish-domiciled UCITS fund on the MSCI World index. Next to SOXX, 12% of the money is the same, spread over 21 companies both hold, as of October 16, 2026.
Does the SOXX vs IWDA overlap apply to other tickers?
Yes. IWDA also trades as SWDA (London, GBP; Borsa Italiana, EUR) and EUNL (Xetra, EUR). Each is the same portfolio in another currency, on another exchange or paying its dividends out, so SOXX vs EUNL also overlaps 12%.
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 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.