SPY vs VOO overlap - what they share and where they differ
SPY and VOO share 99.8% of their weight across 498 common positions, read from what each fund reported to the SEC.
Each week Ploutos reads the reported positions of the largest US equity ETFs and measures, pair by pair, the weight they share: for every stock both funds hold, the smaller of the two weights counts. Two funds tracking the same index land near 100%. A sector fund inside a broad index fund lands at roughly that sector's weight.
SPY and VOO
99.8%
498 shared positions
SPY
SPY
Reported positions cover 100% of the fund, 499 positions · Jun 30, 2026
Top 10: 37.9%·Holdings of SPY
VOO
VANGUARD 500 INDEX FUND
Reported positions cover 100% of the fund, 500 positions · Jun 30, 2026
Top 10: 37.9%·Holdings of VOO
Reported positions cover SPY 100%, VOO 100% of each fund. An overlap cannot exceed the smaller coverage, so a low figure can mean little overlap or thin reporting.
VOO vs SPY side by side
SPY
499
stock positions reported to the SEC
0.1% of its weight is in 1 names VOO does not hold
VOOVANGUARD 500 INDEX FUND
500
stock positions reported to the SEC
0.1% of its weight is in 2 names SPY does not hold
Where each fund's weight sits
Largest sectors for both funds
No sector differs by more than a point between the two.
The figures side by side
| SPY | VOO | |
|---|---|---|
| Filing date | Jun 30, 2026 | Jun 30, 2026 |
| Stock positions reported | 499 | 500 |
| Weight of the ten largest | 37.9% | 37.9% |
| Largest position | NVDA 7.5% | NVDA 7.5% |
| Held alone | 1 positions, 0.1% | 2 positions, 0.1% |
| Covered by stock positions | 100% | 100% |
Holdings they share
| Stock | In SPY | In VOO | Counted |
|---|---|---|---|
| NVDANVIDIA Corp | 7.52% | 7.51% | 7.51% |
| AAPLApple Inc | 6.59% | 6.59% | 6.59% |
| GOOGLAlphabet Inc | 5.84% | 5.84% | 5.84% |
| MSFTMicrosoft Corp | 4.30% | 4.30% | 4.30% |
| AMZNAmazon.com Inc | 3.62% | 3.62% | 3.62% |
| AVGOBroadcom Inc | 2.77% | 2.77% | 2.77% |
| MUMicron Technology Inc | 2.02% | 2.02% | 2.02% |
| METAMeta Platforms Inc | 1.92% | 1.92% | 1.92% |
| TSLATesla Inc | 1.84% | 1.84% | 1.84% |
| AMDAdvanced Micro Devices Inc | 1.47% | 1.47% | 1.47% |
What each holds alone
The heaviest positions one fund reports and the other does not.
Only in SPY
Only in VOO
Questions people ask
Is SPY the same as VOO?
99.8% of their weight sits in the same 498 holdings. SPY also reports HIG, which the other does not. VOO also reports HARTFORD FINANCIAL SERVICES GROUP INC/THE, CAG, which the other does not.
How is the overlap between SPY and VOO measured?
For every stock both funds report, the smaller of the two weights counts, and the sum is the overlap. The reported positions cover 100% of SPY and 100% of VOO, so the number cannot exceed the smaller coverage.
Which holds more, VOO or SPY?
SPY reports 499 stock positions and VOO reports 500. 0.1% of SPY's weight sits in names VOO does not hold, and 0.1% of VOO's weight in names SPY does not hold. The ten largest positions are 37.9% of SPY and 37.9% of VOO.
How do SPY and VOO differ by sector?
No sector differs by more than a point between the two. Sectors come from each holding's SIC code in its SEC record, summed by the weight the fund reports.
Where do the numbers come from?
From each fund's own N-PORT filing to the SEC, which lists every position and its weight. The comparison uses every equity position the fund reports; cash, futures and bonds are not counted, which is why a coverage figure sits next to every result. Holdings change between filings.
Other pairs with these funds
SPY against other funds in the table
VOO against other funds in the table
Add a third fund in the tool·All fund pairs
Descriptive data from public SEC filings. Nothing on this page is a recommendation to buy, sell or hold any fund or stock, and holdings change between filings.