VTI vs CSPX overlap

Nearly: 88% of the money in VTI and CSPX sits in the same companies at the same weights, as of August 31, 2026. The other 12% is weight differences, plus 3,004 names only in VTI and 5 only in CSPX.

88% by weight, as of August 31, 2026: nearly the same fund. 499 companies appear in both funds; they make up 89% of VTI and 100% of CSPX.

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 $88 (half in each fund) buys identical positions. The rest is exposure only one of the two funds gives you: 3,004 names only in VTI, 5 only in CSPX. Half in each behaves like 51 equally weighted stocks, against 59 for VTI alone and 44 for CSPX alone. Whether that duplication is a problem depends on the mix you want; this is a description, not advice.

Partly: 88% of the money in CSPX and VTI is the same, as of August 31, 2026. CSPX is iShares Core S&P 500 UCITS ETF (ISIN IE00B5BMR087), an Irish-domiciled UCITS fund on the S&P 500 index. European brokers generally don't sell US-listed ETFs such as VTI to retail clients, because those funds publish no KID (the PRIIPs key information document); UCITS funds do.

Yes. CSPX also trades as CSP1 (London, GBP), SXR8 (Xetra, EUR) and CSSPX (Borsa Italiana, EUR). Each is the same portfolio in another currency, on another exchange or paying its dividends out, so VTI vs SXR8 also overlaps 88%.

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.