ISA Lens

Free UK ISA tool

ETF overlap calculator

Check whether the ETFs in a Stocks & Shares ISA are holding the same companies underneath. This is useful when a portfolio combines global, S&P 500, Nasdaq 100, technology or dividend funds that may look different by name but overlap in practice.

Check my ETF overlap

What the free check can show

  • Whether your entered ETFs appear to overlap.
  • Which holdings need better data before a precise X-Ray.
  • Plain-English questions worth asking about concentration.

What the full X-Ray adds

  • Company-level exposure across direct shares and funds.
  • Sector and geography tables for the whole ISA.
  • Downloadable report and what-if simulator.

Data note

ETF holdings change over time. ISA Lens should label unsupported holdings and avoid presenting incomplete look-through data as a complete answer.

Precise ETF comparisons are being verified

ISA Lens is not publishing exact overlap percentages until the underlying holdings and customer-display rights have been checked. You can still enter your funds to see which parts of the portfolio need verified look-through data.