ETF Overlap Tool: Compare Two ETFs' Holdings
Check how much two ETFs overlap: which stocks they share in their top 10 positions, how much weight each fund puts behind them, and whether owning both is diversification or redundancy. Instant, free, no account needed.
Overlap is one of seven checks. Get the full list.
The ETF Comparison Checklist: index, fee, overlap, tax, liquidity, concentration, and structure. Everything to weigh before you pick between two funds. One printable page.
No spam · Unsubscribe anytime · Your download opens instantly
Your download is ready above. We also emailed a confirmation link, click it to get The Expense Report, our weekly ETF newsletter.
Top-10 holdings data, updated regularly from public sources. Shared position counts and weight percentages reflect top-10 positions only — not full portfolio overlap. For broad market funds (VTI, VOO, SPY), true overlap is significantly higher than what top-10 data shows. Nothing here is personalized financial advice, and ETF BFF is not a registered investment adviser. Full disclosures.
Popular Comparisons
What this tool shows — and what it doesn't
This tool compares the top 10 holdings of two ETFs by weight. For each company that appears in both funds, it shows the weight each fund assigns to it. The top-10 weight overlap percentage is the sum of the minimum weight for each shared position — a measure of how much top-position capital lands in the same stock through both funds.
This is not a full portfolio overlap tool. VTI owns 3,700 stocks; its top 10 represent about 34% of its weight. The true overlap between VTI and VOO is approximately 82% across all holdings — this tool will show a lower figure because it only sees the top 10 positions. For complete portfolio overlap, ETF.com uses Morningstar full holdings data and is the right resource for broad index fund comparisons.
Where this tool is reliable: concentrated funds. For sector ETFs, dividend ETFs, and factor ETFs — where the top 10 positions represent 40-50% of fund weight — the shared holdings comparison gives a meaningful read on whether two funds are betting on the same companies. It also shows exactly which companies those are and how heavily each fund weights them.
Common questions about ETF overlap
What is ETF overlap?
ETF overlap is the degree to which two funds hold the same stocks. When two ETFs share many of the same top positions at similar weights, owning both adds less diversification than it looks, because your money is concentrated in the same companies through both funds rather than spread across different ones.
Why does ETF overlap matter?
Overlap is the hidden reason a portfolio can feel diversified while being concentrated. If you hold VTI and VOO, roughly 80% of VOO already sits inside VTI, so the second fund mostly doubles exposure you already have. Checking overlap before you add a fund tells you whether it is genuine diversification or redundancy.
How do I check the overlap between two ETFs?
Enter the two tickers in the tool above. It pulls each fund's top 10 holdings and shows every stock they share, the weight each fund assigns it, and a top-10 overlap percentage. It works for any two US-listed ETFs, returns a result instantly, and needs no signup. That makes it an ETF overlap checker and calculator in one.
How much ETF overlap is too much?
There is no fixed cutoff, but a useful rule: if two funds share most of their top holdings at similar weights, the second one is mostly redundant. High overlap is fine when it is intentional, such as a core holding you want to concentrate in, and a problem when you bought the second fund expecting diversification you are not actually getting.
Does this show full portfolio overlap?
No. It compares the top 10 holdings by weight, which is the right read for concentrated funds such as sector, dividend, and factor ETFs, where the top 10 is 40 to 50% of the fund. For broad index funds that hold thousands of stocks, true overlap is higher than the top-10 figure, and a full-holdings source like ETF.com is the better tool.
Can I use it for Canadian or non-US ETFs?
The tool covers US-listed ETFs. Many Canadian investors use it for the US funds inside their portfolios, but it does not currently include TSX-listed tickers.
Full Pair Analyses
These pages go deeper than the tool: written analysis, common questions answered, and context on whether owning both funds is redundant or complementary.
The ETF Overlap Problem — why top holdings matter → Analyze your full portfolio →