CSPX vs VUAA: how much do they overlap?
iShares Core S&P 500 UCITS ETF (USD Acc) (CSPX) · Vanguard S&P 500 UCITS ETF (USD Acc) (VUAA)
CSPX and VUAA overlap by 92.5% by portfolio weight. In practical terms, about 7.5% of the smaller-weighted exposure is different between the two funds. They share 496 stocks; the largest shared position is Nvidia Corp (NVDA), contributing 7.49% to the overlap.
overlap by weight · 496 shared holdings
CSPX: 503 holdings (as of 2026-08-04) · VUAA: 503 holdings (as of 2026-06-30)
Holdings dates reflect the latest official files available for each issuer. Some issuers publish daily files; others are represented by periodic SEC filings. Analysis template updated 2026-08-04.
Note: the two funds' latest official filings have different dates, which can understate overlap slightly for funds tracking similar indexes.
High overlap
What this means
CSPX and VUAA are largely the same portfolio. Holding both adds little diversification — most dollars end up in the same underlying stocks.
Overlap by weight sums the smaller of the two funds' weights for every stock they both hold — it answers "how much of my money is in the same stocks either way?" See methodology.
Top shared holdings
| Company | Ticker | in CSPX | in VUAA |
|---|---|---|---|
| Nvidia Corp | NVDA | 7.7% | 7.49% |
| Apple Inc | AAPL | 6.82% | 6.57% |
| Microsoft | MSFT | 5.49% | 4.28% |
| Amazon.Com Inc | AMZN | 4.08% | 3.61% |
| Alphabet Class A | GOOGL | 3.32% | 3.24% |
| Broadcom Inc | AVGO | 2.97% | 2.77% |
| Alphabet Class C | GOOG | 2.66% | 2.58% |
| Meta Platforms Class A | META | 1.94% | 1.91% |
| Micron Technology | MU | 1.51% | 2.01% |
| Tesla Inc | TSLA | 1.38% | 1.83% |
FAQ
How much do CSPX and VUAA overlap?
CSPX and VUAA have a 92.5% overlap by weight, sharing 496 holdings (out of 503 in CSPX and 503 in VUAA), based on official issuer holdings as of 2026-08-04.
What does 92.5% overlap mean?
CSPX and VUAA are largely the same portfolio. Holding both adds little diversification — most dollars end up in the same underlying stocks.
Which stocks do CSPX and VUAA both hold?
The largest shared positions are Nvidia Corp, Apple Inc, Microsoft, Amazon.Com Inc, Alphabet Class A. The full list of top shared holdings with weights in each fund is shown on this page.