UCITS ETF Overlap Checker

UCITS ETF overlap measures how much two or more European-regulated funds share the same underlying stocks. High overlap means a portfolio that looks diversified by fund count may still concentrate in the same mega-cap names.

Compare popular UCITS pairs and see look-through exposure for European portfolios.

Why UCITS overlap matters

European investors often hold a "global" UCITS ETF (VWCE, IWDA, or VWRL) alongside a US or S&P 500 fund (VUAA, VUSA, or CSPX). On paper that is two or three funds. In practice, US mega-caps can appear in every sleeve, pushing true US technology exposure well above a simple allocation chart.

The main ETF overlap checker supports US-listed tickers today (VOO, QQQ, SCHD, and similar). This hub collects UCITS-specific guides and pair pages for investors on LSE, XETRA, Euronext and other European venues.

Dataset: These UCITS pair pages use licensed full holdings from third-party data feeds, (exchange-qualified symbols such as VWCE.DE and IWDA.L), with the same quality gates as Guardfolio's US overlap research: provider weights near 100% and at least 97% retained coverage. The US ETF catalog is unchanged.

Popular UCITS overlap pairs

VWCE vs VUAA

Global all-cap vs US S&P 500 UCITS - common core plus satellite mix. Current licensed overlap: 60.0% across 443 shared securities.

IWDA vs EIMI

Developed world vs emerging markets - classic developed/EM split. Current licensed overlap: 0.0% across 0 shared securities.

VWRL vs VUSA

UK-listed global vs US equity - frequent ISA and SIPP pairing. Current licensed overlap: 60.0% across 443 shared securities.

EQQQ vs CSPX

Nasdaq-100 UCITS vs S&P 500 UCITS - European QQQ vs VOO analogue. Current licensed overlap: 53.7% across 87 shared securities.

VWCE vs IWDA

All-world vs developed-world core - checks how much EM and small-cap actually differ. Current licensed overlap: 84.5% across 1197 shared securities.

US ETF overlap checker

US-listed funds such as VOO, QQQ and SCHD stay on the separate US overlap tool.

Related tools

ETF overlap checker Canadian ETF overlap hub UCITS portfolio X-Ray US ETF portfolio X-Ray Concentration calculator Portfolio tracker UK

After overlap: monitor the full portfolio

Pairwise overlap is a starting point. Once accounts are connected, portfolio risk monitoring tracks overlap, concentration and drift continuously across every broker and wrapper. UK investors can start with the UK portfolio tracker guide.

For a broader international comparison of tools and regions, see best portfolio tracker for international investors.

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