ETF overlap tool
Compare 2 to 4 ETFs to see how much of their portfolios overlap by weight, what they share, and which institutions own them together. It’s free and needs no account.
Pick 2 to 4 ETFs.
SPY files no portfolio holdings with the SEC; shown using IVV, which tracks the same index, as of June 30, 2026.
Top shared holdings
| Holding | VOO | SPY | Overlap |
|---|---|---|---|
| Nvidia Corp.NVDA | 7.51% | 7.51% | 7.51% |
| Apple Inc.AAPL | 6.59% | 6.58% | 6.58% |
| Microsoft Corp.MSFT | 4.30% | 4.29% | 4.29% |
| Amazon.COM Inc.AMZN | 3.62% | 3.61% | 3.61% |
| Alphabet Inc.-aGOOGL | 3.25% | 3.25% | 3.25% |
| Broadcom Inc.AVGO | 2.77% | 2.77% | 2.77% |
| Alphabet Inc.-CGOOG | 2.59% | 2.59% | 2.59% |
| Micron TechMU | 2.02% | 2.02% | 2.02% |
| META Platforms-aMETA | 1.92% | 1.92% | 1.92% |
| Tesla Inc.TSLA | 1.84% | 1.83% | 1.83% |
| ELI Lilly & CoLLY | 1.47% | 1.47% | 1.47% |
| ADV Micro DeviceAMD | 1.47% | 1.47% | 1.47% |
| Berkshire HATH-BBRK/B | 1.42% | 1.42% | 1.42% |
| JPMorgan ChaseJPM | 1.26% | 1.36% | 1.26% |
| Intel Corp.INTC | 1.02% | 1.02% | 1.02% |
Overlap by weight adds up the smaller weight of each holding the funds share, so 100% means identical portfolios. Long securities only: derivatives and cash vehicles are left out. Sources: VOO, SEC Form N-PORT, June 30, 2026; SPY, IVV's SEC Form N-PORT, June 30, 2026.
Largest institutions holding both
| Firm | VOO | SPY |
|---|---|---|
| JPMorgan Chase & Co | $16.3B | $35.3B |
| Bank of America Corp. | $19.1B | $23.0B |
| Morgan Stanley | $17.1B | $24.1B |
| Goldman Sachs Group Inc. | $10.6B | $23.5B |
| Jane Street Group, LLC | $19.3M | $33.1B |
| Raymond James Financial Inc. | $21.4B | $3.5B |
| Wells Fargo & Company | $4.4B | $9.0B |
| Jones Financial Companies LLLP | $12.4B | $761.2M |
| Royal Bank of Canada | $5.8B | $6.8B |
| UBS Group AG | $3.3B | $9.2B |
| LPL Financial LLC | $4.5B | $7.4B |
| Susquehanna International Group, LLP | $441.8M | $10.9B |
| Northern Trust Corp. | $305.7M | $10.3B |
| Envestnet Asset Management Inc. | $7.4B | $1.9B |
| Gotham Asset Management, LLC | $196.5M | $8.5B |
This compares who owns the funds, not what the funds hold. From SEC Form 13F, for managers with $100M+ in US securities.
Popular comparisons
Frequently asked questions
How is ETF overlap calculated?
For each holding two funds share, take the smaller of its two weights, then add those up. Two identical portfolios score 100%, and two funds with nothing in common score 0%.
Where do the holdings come from?
From the portfolio reports funds file with the SEC on Form N-PORT, which become public with a delay. SPY and MDY are unit trusts that file no holdings with the SEC, so they're shown using IVV and IJH, which track the same indexes. DIA has no comparable fund, so it has no holdings here. Each fund's date is shown beside the result.
Why does overlap look low for two funds tracking the same index?
Usually because their holdings are from different dates. Market moves and index changes between those dates reduce the number, and the tool warns you when dates are far apart.
What does which institutions own both mean?
It lists SEC Form 13F filers that report positions in all the funds you picked. That compares the funds' owners, not their portfolios.