ITOT vs IWDA overlap

73% by weight, as of October 14, 2026: heavy overlap. 512 companies appear in both funds; they make up 91% of ITOT and 73% of IWDA.

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.

Out of every $100 split evenly between them, about $73 (half in each fund) buys identical positions. The rest is exposure only one of the two funds gives you: 1,913 names only in ITOT, 736 only in IWDA. Half in each behaves like 67 equally weighted stocks, against 55 for ITOT alone and 83 for IWDA alone. Whether that duplication is a problem depends on the mix you want; this is a description, not advice.

Partly: 73% of the money in IWDA and ITOT is the same, as of October 14, 2026. IWDA is iShares Core MSCI World UCITS ETF (ISIN IE00B4L5Y983), an Irish-domiciled UCITS fund on the MSCI World index. European brokers generally don't sell US-listed ETFs such as ITOT to retail clients, because those funds publish no KID (the PRIIPs key information document); UCITS funds do.

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 ITOT vs EUNL also overlaps 73%.

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.