VOO vs IWDA overlap

71% by weight, as of August 31, 2026: heavy overlap. 437 companies appear in both funds; they make up 99% of VOO and 71% 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 $71 (half in each fund) buys identical positions. The rest is exposure only one of the two funds gives you: 68 names only in VOO, 811 only in IWDA. Half in each behaves like 61 equally weighted stocks, against 46 for VOO 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: 71% of the money in IWDA and VOO is the same, as of August 31, 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 VOO 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 VOO vs EUNL also overlaps 71%.

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 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.