IWM vs VOO ETF holdings comparison
iShares Russell 2000 ETF (IWM) · Vanguard S&P 500 ETF (VOO)
IWM and VOO overlap by 0% by portfolio weight. The remaining 100.0 percentage points are not counted as shared holdings weight by this calculation. They share 0 stocks;
The holdings dates differ. This can slightly understate overlap for funds tracking similar indexes.
What this means
IWM and VOO share a smaller portion of their portfolio weight in the same underlying stocks. OverlapCheck labels this "low holdings overlap" using house ranges of 70% or more, 30% to under 70%, and under 30%. These descriptive ranges are not industry standards or investment guidance. Holdings overlap does not measure correlation, volatility, geographic or factor exposure, fees, or suitability.
Overlap by weight sums the smaller of the two funds' weights for every stock they both hold. It answers "how much of my money is in the same stocks either way?" See methodology.
This comparison covers normalized equity positions represented in the dataset. Cash, derivatives, options, structured notes, and other non-equity assets are not included, so the result is not a complete comparison of every asset or risk in either fund.
Top shared holdings
No shared stocks were found in the normalized issuer holdings used for this comparison. That result applies only to the holdings files and dates shown above.
Holdings only in IWM or VOO
IWM has 1986 fund-only positions representing approximately 99.8 percentage points of reported exposure; VOO has 503 fund-only positions representing approximately 99.8 percentage points of reported exposure. These are positions whose normalized security identifiers appear in one issuer file but not the other.
Largest positions only in IWM
| Company | Ticker | Weight |
|---|---|---|
| Moog, Inc. | MOG.A | 0.38% |
| Hut 8 Corp. | HUT | 0.37% |
| Viasat, Inc. | VSAT | 0.35% |
| BrightSpring Health Services, Inc. | BTSG | 0.35% |
| Cytokinetics, Inc. | CYTK | 0.35% |
| MaxLinear, Inc. | MXL | 0.34% |
| Argan, Inc. | AGX | 0.34% |
| UMB Financial Corp. | UMBF | 0.33% |
| JFrog Ltd. | FROG | 0.31% |
| Riot Platforms, Inc. | RIOT | 0.30% |
Largest positions only in VOO
| Company | Ticker | Weight |
|---|---|---|
| NVIDIA Corp | NVDA | 7.58% |
| Apple Inc | AAPL | 6.66% |
| Microsoft Corp | MSFT | 4.91% |
| Amazon.com Inc | AMZN | 3.64% |
| Alphabet Inc | GOOGL | 2.99% |
| Broadcom Inc | AVGO | 2.62% |
| Alphabet Inc | GOOG | 2.40% |
| Meta Platforms Inc | META | 2.24% |
| Tesla Inc | TSLA | 1.87% |
| Berkshire Hathaway Inc | BRK.B | 1.57% |
FAQ
How much do IWM and VOO overlap?
IWM and VOO have 0% overlap by weight, sharing 0 equity positions (out of 1986 in IWM and 503 in VOO). The official holdings files used are dated 2026-06-30 for IWM and 2026-03-31 for VOO.
What does 0% overlap mean?
IWM and VOO share a smaller portion of their portfolio weight in the same underlying stocks. OverlapCheck labels this "low holdings overlap" using house ranges of 70% or more, 30% to under 70%, and under 30%. These descriptive ranges are not industry standards or investment guidance. Holdings overlap does not measure correlation, volatility, geographic or factor exposure, fees, or suitability.
Which stocks do IWM and VOO both hold?
IWM and VOO have no shared stock positions in the normalized issuer holdings used for this comparison.
What holdings are different between IWM and VOO?
IWM has 1986 positions not found in VOO, while VOO has 503 positions not found in IWM. The largest fund-only positions and their weights are shown on this page.