IWO vs VO: Holdings Overlap
IWOiShares Russell 2000 Growth ETF
iShares · 1101 holdings · $14.8B · as of 2026-03-31
Vanguard · 289 holdings · $109.2B · as of 2026-03-31
How similar are IWO and VO?
iShares Russell 2000 Growth ETF (IWO, by iShares) holds 1101 positions; Vanguard Mid-cap Index Fund (VO, by Vanguard) holds 289. They have 1 holdings in common, and by portfolio weight the two funds are 0.2% identical. In practical terms the pair is essentially distinct, holding almost none of the same securities.
- Overlap by Weight
- 0.2%Sum of the smaller weight of each shared holding
- Shared Holdings
- 1IWO holds 1101 · VO holds 289
- Weight in Shared Holdings
- IWO 2%·VO 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
1100 of 1101 positions (97.8% of the fund) are not held by VO. Showing the top 30 by weight.
Only in VO
288 of 289 positions (99.4% of the fund) are not held by IWO. Showing the top 30 by weight.
Sector Breakdown
| Sector | IWO | VO |
|---|---|---|
| Industrials | 23.7% | 18.4% |
| Health Care | 23.1% | 8.3% |
| Information Technology | 19.0% | 14.2% |
| Financials | 8.6% | 13.8% |
| Consumer Discretionary | 7.3% | 9.3% |
| Other Sectors | 14.1% | 35.7% |
| 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 VO).
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% |
| VO | +2.6% | +14.8% | +18.0% | +15.7% | +8.0% | +11.6% | 1.29% |
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 VO →
Shared Holdings(1)
 BEBloom Energy Corporation COM CL A | 1.99% | 0.20% | 0.20% |
|---|
Frequently Asked Questions
How much do IWO and VO overlap?
IWO and VO overlap by 0.2% of portfolio weight. They share 1 holdings (IWO holds 1101 positions and VO holds 289), based on each fund's latest SEC-reported holdings.
Is it redundant to own both IWO and VO?
The two portfolios are 0.2% identical by weight. Owning both is genuine diversification: the funds hold almost none of the same securities.
What are the biggest shared holdings of IWO and VO?
The largest positions held by both funds are BE. Together the top 1 shared positions account for 98% of the total overlap.
What does IWO own that VO doesn't?
1100 positions (97.8% of IWO) are unique to IWO, led by FN, CRDO and NXT. In the other direction, 288 positions (99.4% of VO) are unique to VO.