IWM vs IWO
iShares Russell 2000 ETF against iShares Russell 2000 Growth ETF: cost, size, returns, what they hold and how much of it is the same.
Overlap by weight
55%
1111 shared positions
Fee gap
5 bp
IWM is cheaper
1-year return gap
4.3 pts
IWM is ahead
Larger fund
IWM
$78.7B
Side by side
| IWM | IWO | |
|---|---|---|
| Fund | iShares Russell 2000 ETF | iShares Russell 2000 Growth ETF |
| Issuer | iShares | iShares |
| Category | Small Cap Blend | Small Cap Growth |
| Expense ratio | 0.19% | 0.24% |
| Assets | $78.7B | $13.9B |
| Average daily dollar volume | $6.8B | $168M |
| Listed | May 22, 2000 | Jul 24, 2000 |
| FrenzyCap score | 90 | 88 |
| 1-month return | −3.0% | −2.4% |
| 3-month return | −5.0% | −5.9% |
| Year to date | +13.3% | +10.5% |
| 1-year return | +13.1% | +8.8% |
| 30-day volatility | 12.2% | 14.6% |
| Worst drawdown, 1 year | −11.2% | −14.9% |
| Trailing 12-month yield | 0.98% | 0.47% |
| Holdings | 1,990 | 1,130 |
| Top 10 weight | 3.2% | 6.3% |
| Look-through P/E | 374.5 | 1667.5 |
| Holdings vs fair value | +14.9% | +10.2% |
| Holdings above 200-day average | 54% | 56% |
| Net flow, latest 3 reported months | −$3.5B thru Jun 2026 | +$167M thru Jun 2026 |
| 30-day implied volatility | 18.3% | 20.6% |
| Holdings as of | as of Oct 8, 2026issuer data | as of Oct 8, 2026issuer data |
Returns are price returns and exclude distributions. Flows are each fund's own latest reported months and may not cover the same period.
Largest shared holdings
64% of IWM · 100% of IWO| Holding | IWM | IWO |
|---|---|---|
| BTSG | 0.36% | 0.72% |
| FROG | 0.36% | 0.71% |
| MOOG INC CLASS A | 0.35% | 0.70% |
| TWST | 0.34% | 0.68% |
| GKOS | 0.31% | 0.62% |
| TXG | 0.30% | 0.61% |
| FCFS | 0.29% | 0.58% |
| PTGX | 0.29% | 0.58% |
| IDCC | 0.29% | 0.57% |
| PCVX | 0.29% | 0.39% |
| KRYS | 0.29% | 0.57% |
| EAT | 0.28% | 0.56% |
| HUT | 0.28% | 0.29% |
| MXL | 0.28% | 0.55% |
| RHP | 0.28% | 0.55% |
| OSCR | 0.27% | 0.54% |
| HQY | 0.27% | 0.52% |
| TGTX | 0.26% | 0.52% |
| ZETA | 0.25% | 0.50% |
| SLAB | 0.25% | 0.49% |
| PLXS | 0.24% | 0.47% |
| COMP | 0.23% | 0.40% |
| ZWS | 0.23% | 0.47% |
| QLYS | 0.23% | 0.47% |
| FSS | 0.23% | 0.46% |
Sector mix of the stock holdings
| Sector | IWM | IWO | Gap |
|---|---|---|---|
| Health Care | 18.8% | 27.0% | −8.2% |
| Industrials | 16.2% | 17.3% | −1.2% |
| Technology | 12.8% | 19.5% | −6.7% |
| Financials | 18.4% | 9.1% | +9.4% |
| Consumer Discretionary | 9.4% | 10.0% | −0.6% |
| Materials | 5.7% | 6.6% | −0.9% |
| Real Estate | 6.2% | 2.2% | +3.9% |
| Energy | 4.2% | 2.9% | +1.3% |
| Utilities | 3.6% | 1.5% | +2.1% |
| Communication Services | 1.9% | 1.5% | +0.5% |
| Consumer Staples | 1.4% | 1.1% | +0.3% |
| Other | 0.1% | 0.1% | −0.0% |
More: full overlap table · IWM holdings · IWO holdings
Fund data comes from each fund's SEC filings and issuer disclosures and is shown with the date it is as of. SEC portfolio and flow filings become public about 60 days after the period they cover. Nothing here is investment advice; see Terms.