ETF comparison · S&P 500 (UCITS)
CSPX vs VUAA: overlap by weight, TER & holdings
iShares Core S&P 500 UCITS ETF USD (Acc) vs Vanguard S&P 500 UCITS ETF (USD) Accumulating
Two Irish S&P 500 trackers at the same headline fee. The decision usually comes down to broker availability, trading currency and fund size rather than the funds themselves.
CSPX also trades as SXR8 (Xetra), CSP1 (LSE (GBP)).
VUAA also trades as VUAG (LSE (GBP)).
CSPX vs VUAA at a glance
| CSPX | VUAA | |
|---|---|---|
| Fund | iShares Core S&P 500 UCITS ETF USD (Acc) | Vanguard S&P 500 UCITS ETF (USD) Accumulating |
| ISIN | IE00B5BMR087 | IE00BFMXXD54 |
| Index | S&P 500 | S&P 500 |
| Market exposure | US large cap | US large cap |
| TER | 0.07% | 0.07% |
| Holdings in fund | 505 | 503 |
| Fund size | ≈ 110 bn USD | ≈ 86 bn USD |
| Domicile | Ireland | Ireland |
| Replication | Physical (full) | Physical (full) |
| Use of income | Accumulating | Accumulating |
| Launched | May 19, 2010 | May 14, 2019 |
Top shared holdings
| CSPX | VUAA | |
|---|---|---|
| NVDANVIDIA | 7.85% | 8.09% |
| AAPLAPPLE | 7.44% | 7.04% |
| MSFTMICROSOFT | 5.64% | 5.7% |
| AMZNAMAZON.COM INC | 3.72% | 3.85% |
| GOOGLALPHABET CLASS A | 3.09% | 3.01% |
| AVGOBROADCOM INC | 2.45% | 2.65% |
| GOOGALPHABET CLASS C | 2.47% | 2.4% |
| METAMETA PLATFORMS CLASS A | 2.25% | 1.9% |
| MUMICRON TECHNOLOGY | 1.6% | 1.64% |
| TSLATESLA INC | 1.53% | 1.57% |
| JPMJPMORGAN CHASE & CO | 1.44% | 1.44% |
| LLYELI LILLY | 1.37% | 1.38% |
| AMDADVANCED MICRO DEVICES | 1.26% | 1.16% |
| XOMEXXONMOBIL HOLDINGS CORP | 1.07% | 1.01% |
| JNJJOHNSON & JOHNSON | 0.98% | 0.97% |
Weights per fund, normalized. 501 companies appear in both funds.
What the fee gap costs
Growth of 10,000 invested at 7% annual return, after each fund’s TER: 0.07% for CSPX, 0.07% for VUAA.
| CSPX | VUAA | Difference | |
|---|---|---|---|
| After 10 years | 19,543 | 19,543 | 0 |
| After 20 years | 38,194 | 38,194 | 0 |
| After 30 years | 74,643 | 74,643 | 0 |
The two funds charge the same TER, so fees do not separate them. TER only. Trading spreads, taxes and broker fees are not included.
Domicile and withholding tax
Both funds are domiciled in Ireland, so fund-level dividend withholding works the same way for both. Domicile does not separate this pair.
Frequently asked questions
Do CSPX and VUAA overlap?+
Yes: 96.19% by weight, with 501 holdings appearing in both funds. 98.26% of CSPX’s weight is also inside VUAA.
Do CSPX and VUAA track the same index?+
Yes. Both funds track the same index: S&P 500. Return differences come from fees, replication and trading costs, not from index choice.
Which is cheaper, CSPX or VUAA?+
Neither: both charge 0.07% per year, so cost does not separate them.
Is it worth holding both CSPX and VUAA?+
Holding both mostly duplicates exposure: 96.19% of the pair overlaps by weight. Most investors pick one, or combine one of them with a fund covering different markets.
More comparisons
Methodology
Overlap is the sum of min(weight A, weight B) across holdings that appear in both funds, with each fund’s stored weights normalized to 100%. Holdings come from issuer feeds and regulatory filings in our ETF holdings database; TER and fund size come from fund profile data and are refreshed regularly. Figures update when the underlying holdings data updates.
Holdings data as of Sep 14, 2026, from our ETF holdings database.