etf overlap tool
How much of your two ETFs is the same money?
Type any two of 579 ETFs. We compare every company they hold, from the full holdings files the issuers publish or the fund's latest SEC N-PORT filing, and tell you what share you would own twice. 54 of them have a page for every pair (1,431 pairs). 8 of them are the UCITS funds European brokers sell (IWDA, VWCE, CSPX, VUAA…), read from iShares' and Vanguard's UK files.
Holdings as of September 25, 2026 · source: Vanguard, SPDR, Invesco, iShares, Schwab, J.P. Morgan, VanEck, ARK Invest · How we measured all 1,431 pairs
Check your whole set of ETFs, not just two
NVIDIA Corp is 5.9% of your money, through 3 of your 4 funds.
3,531
561
96.5%
- 1NVIDIA CorpNVDAHeld by VOO, QQQ, VTI.5.9%
- 2Apple IncAAPLHeld by VOO, QQQ, VTI.5.5%
- 3Microsoft CorpMSFTHeld by VOO, QQQ, VTI.4.3%
- 4Amazon.com IncAMZNHeld by VOO, QQQ, VTI.2.8%
- 5Alphabet IncGOOGLHeld by VOO, QQQ, VTI.2.2%
- 6Meta Platforms IncMETAHeld by VOO, QQQ, VTI.2.0%
- 7Micron Technology IncMUHeld by VOO, QQQ, VTI.1.9%
- 8Alphabet IncGOOGHeld by VOO, QQQ, VTI.1.9%
- 9Broadcom IncAVGOHeld by VOO, QQQ, VTI.1.8%
- 10Advanced Micro Devices IncAMDHeld by VOO, QQQ, VTI.1.7%
Every pair, in one grid
The pairs that are most alike
What ETF overlap is, and how we measure it
ETF overlap is how much of two funds is the same money: the companies both hold, counted at the weight both give them. VOO puts 8.4% of its money in NVDA and QQQ puts 8.2%, so 8.2% of each fund is the same NVDA. Add that up over the 86 companies both hold and you get their overlap, 55.6%.
- same money
- For each company both funds hold, the smaller of its two weights, added up. It reads the same in both directions, and it is the figure in the matrix above.
- one way
- The share of one fund sitting in companies the other also holds, at any weight. 92.9% of QQQ is in companies VOO holds; only 55.9% of VOO is in QQQ's. A pair page under 80% leads with this figure once it passes 75%.
- matching
- On each company's ISIN, so a company matches across issuers and Alphabet's two share classes stay apart. Cash, futures and currency lines are left out.
- dates
- Each issuer publishes on its own schedule. The files in use run from September 25 to October 18, 2026 (the oldest is ARKK's); each pair page shows the older of its two dates.
- n-port funds
- The 22 other funds listed below, and the 500 more the picker measures, are read from their SEC Form N-PORT: quarterly, and filed up to 60 days after the date it describes. They have no pair pages.
- not returns
- Overlap says what you own twice, not how the funds move. Funds that share little can still rise and fall together: how closely look-alike ETF pairs moved, week by week.
How much overlap is too much? Where 1,431 real pairs fall
There is no official threshold, and most pairs share far less than people fear. Across every pair of our 54 funds, the median pair is 4.3% the same money and three in four are under 25.1%. 448 pairs share no company at all. At the other end, 172 pairs share half their money or more, 57 share 70% or more, and 34 are past 80%, close to one portfolio under two tickers. Read one way, far more pairs have one fund mostly inside the other: how to check ETF overlap, both ways.
The figure that answers “is my second fund redundant?” is the one-way one. If you own VOO, 35 of the 53 other funds have at least three quarters of their money in companies VOO already holds, even though only 19 of them share half their money with it.
A typical doubling is VOO plus QQQ. Put $100 in each and $55.64 of each buys the same positions; QQQ adds 15 companies VOO doesn't hold. The mix also gets more concentrated, not less: half in each behaves like 39 equally weighted stocks, against 43 for VOO alone.
ETF overlap: what people ask
Is VOO the same as IVV?
Nearly. 96.6% of the money in VOO and IVV is the same: both track the S&P 500, and 501 companies are in both files. The other 3.4% is weight differences and a few lines in one file only, partly because the two files are not from the same day (Vanguard's is dated September 30, 2026, iShares' October 16, 2026). CSPX, the UCITS S&P 500 fund European brokers sell, overlaps VOO by 96.7%.
How do I check ETF overlap?
Pick two funds in the tool at the top of this page. The pair page lists every company both funds hold with its weight in each, what only one of them holds, and how their sectors compare. All 1,431 pairs of our 54 funds are in the grid above. For three funds or more, import your portfolio: the X-ray adds up what you hold through all of them.
How much ETF overlap is too much?
There is no official line. Across our 1,431 pairs, the median shares 4.3% of its money, three in four share less than 25.1%, and 172 pairs (12.0%) share half or more. From 80% up, two funds are close to one portfolio under two tickers: 34 of our pairs are there. Read the one-way figure too: 92.9% of QQQ sits in companies VOO also holds, while 55.9% of VOO sits in QQQ's companies.
Does overlap matter if the two funds track different indexes?
Yes: the index name says little about what you own twice. VOO (S&P 500) and VTI (CRSP US Total Market) are 89.0% the same money; IWDA (MSCI World) and VWCE (FTSE All-World) are 83.9% the same money. In both pairs, the wider fund holds nearly everything the other does, then adds more: 99.9% of VOO is in companies VTI holds, 98.5% of IWDA is in companies VWCE holds.
Does low overlap mean two funds move differently?
Not by itself. Overlap counts the companies two funds hold in common; it says nothing about how their prices move. VOO (S&P 500) and IJR (S&P 600, smaller companies) share no company at all, and both hold companies listed in the US. How closely two funds rise and fall together is a separate measure, the correlation of their returns.
How often is the overlap data updated?
We re-download the issuers' full holdings files and rebuild every pair when we refresh them, by hand, not daily. The files in use are dated September 25 to October 18, 2026. Each pair page shows the older of its two dates. Between two refreshes, the weights drift with prices.
For three funds or more: Portfolio X-ray adds up what you hold through all of them. Files dated September 25 to October 18, 2026.
Full holdings, fund by fund
VOO505 holdings
SPY504 holdings
QQQ101 holdingsVTI3,516 holdings
IVV503 holdings
SCHD100 holdingsQQQM102 holdingsVIG333 holdings
JEPI119 holdingsVUG135 holdingsVGT318 holdingsVYM593 holdingsVTV298 holdingsDIA30 holdingsIWM1,971 holdingsXLK75 holdings
SMH25 holdingsSOXX30 holdings
ARKK45 holdingsVEA3,900 holdingsVWO5,017 holdingsEFA655 holdingsEEM1,169 holdingsVNQ140 holdingsXLF76 holdingsXLE22 holdingsXLV62 holdingsXLI83 holdingsXLY48 holdingsXLP35 holdingsVXUS8,864 holdingsVT10,155 holdingsJEPQ94 holdingsRSP504 holdingsVOVOOG152 holdingsMGMGK52 holdingsVB1,301 holdingsVO271 holdingsIJH400 holdingsIJR604 holdingsITOT2,423 holdingsIEFA2,618 holdingsIWF371 holdingsSPYG152 holdingsXLC22 holdingsXLU32 holdingsIWDA1,248 holdingsVWCE3,795 holdingsCSPX503 holdingsVUAA503 holdingsEIMI2,889 holdingsSSSSAC1,640 holdingsCNCNDX101 holdingsSMSMEA385 holdingsMore funds, from their SEC filings (Form N-PORT): AVUV · COWZ · DGRO · DVY · HDV · ITA · IWB · IWD · MTUM · NOBL · QUAL · SCHB · SCHF · SCHG · SCHX · SDY · SPYD · SPYM · USMV · XBI · XLB · XLRE
Overlap is the sum, over companies both funds hold, of the smaller of the two weights, so it reads the same in both directions. Companies are matched on their ISIN; cash and derivatives are left out. Not investment advice.