ITOT vs IWM ETF holdings comparison
iShares Core S&P Total U.S. Stock Market ETF (ITOT) · iShares Russell 2000 ETF (IWM)
ITOT and IWM overlap by 4.2% by portfolio weight. The remaining 95.8 percentage points are not counted as shared holdings weight by this calculation. They share 1388 stocks; the largest shared position is Moog, Inc. (MOG.A), contributing 0.02% to the overlap.
What this means
ITOT and IWM 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
| Company | Ticker | in ITOT | in IWM |
|---|---|---|---|
| Moog, Inc. | MOG.A | 0.02% | 0.38% |
| Viasat, Inc. | VSAT | 0.02% | 0.35% |
| Cytokinetics, Inc. | CYTK | 0.02% | 0.35% |
| Hut 8 Corp. | HUT | 0.02% | 0.37% |
| Argan, Inc. | AGX | 0.02% | 0.34% |
| BrightSpring Health Services, Inc. | BTSG | 0.02% | 0.35% |
| MaxLinear, Inc. | MXL | 0.01% | 0.34% |
| UMB Financial Corp. | UMBF | 0.01% | 0.33% |
| Krystal Biotech, Inc. | KRYS | 0.01% | 0.30% |
| CareTrust REIT, Inc. | CTRE | 0.01% | 0.28% |
Holdings only in ITOT or IWM
ITOT has 1062 fund-only positions representing approximately 95.6 percentage points of reported exposure; IWM has 598 fund-only positions representing approximately 7.8 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 ITOT
| Company | Ticker | Weight |
|---|---|---|
| NVIDIA Corp. | NVDA | 6.63% |
| Apple, Inc. | AAPL | 5.81% |
| Microsoft Corp. | MSFT | 3.79% |
| Amazon.com, Inc. | AMZN | 3.19% |
| Alphabet, Inc. | GOOGL | 2.86% |
| Broadcom, Inc. | AVGO | 2.45% |
| Alphabet, Inc. | GOOG | 2.29% |
| Micron Technology, Inc. | MU | 1.78% |
| Meta Platforms, Inc. | META | 1.69% |
| Tesla, Inc. | TSLA | 1.62% |
Largest positions only in IWM
| Company | Ticker | Weight |
|---|---|---|
| JFrog Ltd. | FROG | 0.31% |
| SSR Mining, Inc. | SSRM | 0.20% |
| Xenon Pharmaceuticals, Inc. | XENE | 0.18% |
| Golar LNG Ltd. | GLNG | 0.15% |
| Brookfield Infrastructure Corp. | BIPC | 0.15% |
| Constellium SE | CSTM | 0.13% |
| Marex Group plc | N/A | 0.12% |
| Energy Fuels, Inc. | UUUU | 0.11% |
| Scorpio Tankers, Inc. | STNG | 0.10% |
| Kiniksa Pharmaceuticals International plc | KNSA | 0.08% |
FAQ
How much do ITOT and IWM overlap?
ITOT and IWM have 4.2% overlap by weight, sharing 1388 equity positions (out of 2450 in ITOT and 1986 in IWM). The official holdings files used are dated 2026-06-30 for ITOT and 2026-06-30 for IWM.
What does 4.2% overlap mean?
ITOT and IWM 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 ITOT and IWM both hold?
The largest shared positions are Moog, Inc., Viasat, Inc., Cytokinetics, Inc., Hut 8 Corp., Argan, Inc.. The top shared holdings with weights in each fund are shown on this page.
What holdings are different between ITOT and IWM?
ITOT has 1062 positions not found in IWM, while IWM has 598 positions not found in ITOT. The largest fund-only positions and their weights are shown on this page.