IWO vs VOO: Holdings Overlap
IWOiShares Russell 2000 Growth ETF
iShares · 1101 holdings · $14.8B · as of 2026-03-31
Vanguard · 504 holdings · $1.03T · as of 2026-03-31
How similar are IWO and VOO?
iShares Russell 2000 Growth ETF (IWO, by iShares) holds 1101 positions; Vanguard 500 Index Fund (VOO, by Vanguard) holds 504. They have 0 holdings in common, and by portfolio weight the two funds are 0.0% identical. In practical terms the pair is essentially distinct, holding almost none of the same securities.
- Overlap by Weight
- 0.0%Sum of the smaller weight of each shared holding
- Shared Holdings
- 0IWO holds 1101 · VOO holds 504
- Weight in Shared Holdings
- IWO 0%·VOO 0%Share of each fund's weight in stocks both funds own
Based on each fund's latest official holdings. How is this calculated?
What makes each fund different
Only in IWO
1101 of 1101 positions (99.8% of the fund) are not held by VOO. Showing the top 30 by weight.
Sector Breakdown
| Sector | IWO | VOO |
|---|---|---|
| Information Technology | 19.0% | 32.7% |
| Industrials | 23.7% | 9.0% |
| Health Care | 23.1% | 9.5% |
| Financials | 8.6% | 12.4% |
| Communication Services | 2.3% | 10.5% |
| Other Sectors | 19.2% | 25.7% |
| Unclassified | 4.0% | 0.0% |
Share of each fund's portfolio weight by GICS-style sector, compiled from issuer fund data and our own classification of the holdings, not the issuers' published sector charts. “Unclassified” is weight we could not classify (4% of IWO, 0% of VOO).
Performance
| Fund | 1M | YTD | 1Y | 3Y (ann.) | 5Y (ann.) | 10Y (ann.) | Yield |
|---|---|---|---|---|---|---|---|
| IWO | +1.2% | +21.0% | +34.7% | +17.5% | +5.9% | +11.0% | 0.42% |
| VOO | +3.4% | +14.0% | +23.7% | +21.3% | +13.4% | +15.4% | 1.03% |
Total returns including dividends, from adjusted daily closes as of 2026-08-07. 3Y/5Y/10Y are annualized. Yield is trailing-12-month distributions over the last close. Past performance does not predict future results.
Project the growth of $10,000 in IWO vs VOO →
Shared Holdings(0)
These two funds have no holdings in common.
Frequently Asked Questions
How much do IWO and VOO overlap?
IWO and VOO overlap by 0.0% of portfolio weight. They share 0 holdings (IWO holds 1101 positions and VOO holds 504), based on each fund's latest SEC-reported holdings.
Is it redundant to own both IWO and VOO?
The two portfolios are 0.0% identical by weight. Owning both is genuine diversification: the funds hold almost none of the same securities.
What does IWO own that VOO doesn't?
1101 positions (99.8% of IWO) are unique to IWO, led by BE, FN and CRDO. In the other direction, 504 positions (99.8% of VOO) are unique to VOO.