etf overlap tool · heavy overlap
VOO vs CNDX overlap
93% of CNDX's money sits in companies VOO also holds; 56% of the two funds is the same money, spread over 86 companies both hold.
Holdings as of September 30, 2026 · source: Vanguard (VOO), iShares (CNDX) · How we measured all 1,431 pairs
- same money
- same companies, extra weight
- only in this fund
Hold VOO and CNDX with other funds or stocks? The free portfolio optimizer opens VOO and CNDX 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
SHOPSHOPIFY SUBORDINATE VOTING CLASS A0.90%Where each fund puts its money
VOO and CNDX: what people ask
How much do VOO and CNDX overlap?
56% by weight, as of September 30, 2026: heavy overlap. 86 companies appear in both funds; they make up 56% of VOO and 93% of CNDX.
Which stocks do VOO and CNDX both hold?
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.
Is it redundant to hold both VOO and CNDX?
Out of every $100 split evenly between them, about $56 (half in each fund) buys identical positions. The rest is exposure only one of the two funds gives you: 419 names only in VOO, 15 only in CNDX. Half in each behaves like 39 equally weighted stocks, against 43 for VOO alone and 31 for CNDX alone. Whether that duplication is a problem depends on the mix you want; this is a description, not advice.
Is CNDX the European version of VOO?
Partly: 56% of the money in CNDX and VOO is the same, as of September 30, 2026. CNDX is iShares Nasdaq 100 UCITS ETF (ISIN IE00B53SZB19), an Irish-domiciled UCITS fund on the Nasdaq-100 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.
Does the VOO vs CNDX overlap apply to other tickers?
Yes. CNDX also trades as CNX1 (London, GBP), SXRV (Xetra, EUR) and CSNDX (Borsa Italiana, EUR). Each is the same portfolio in another currency, on another exchange or paying its dividends out, so VOO vs SXRV also overlaps 56%.
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 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.
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.