ETF comparison
IWO vs VIOV
Both US Small Cap.
iShares Russell 2000 Growth ETF · Vanguard S&P Small-Cap 600 Value Index Fund ETF Shares
Holdings overlap
175 positions appear in both funds. Buying equal dollars of IWO and VIOV would leave roughly 17.8% of each dollar exposed to the same underlying securities.
Unmatched is the part of a fund's weight the other fund doesn't match: names only it holds, plus any extra weight it puts in names both funds hold.
Side by side
Sub-score comparison
Tracking quality isn't part of the composite — see what we don't score for why.
Cost difference
VIOV is 14 bps cheaper than IWO. On a $100,000 position that's about $140/yr more in fees for IWO.
Fee figure is the annual expense charged on $100,000. To see how the gap compounds over a multi-decade holding period, open the cost calculator pre-filled with IWO vs VIOV.
Top shared holdings
175 shared in total| # | Holding | In IWO | In VIOV | Overlap |
|---|---|---|---|---|
| 1 | Kulicke & Soffa Industries, Inc. | 0.42% | 0.45% | 0.42% |
| 2 | Plexus Corp. | 0.49% | 0.39% | 0.39% |
| 3 | Glaukos Corp. | 0.48% | 0.35% | 0.35% |
| 4 | Victoria's Secret & Co. | 0.35% | 0.73% | 0.35% |
| 5 | Ultra Clean Holdings, Inc. | 0.38% | 0.33% | 0.33% |
| 6 | MaxLinear, Inc. | 0.66% | 0.31% | 0.31% |
| 7 | Magnolia Oil & Gas Corp. | 0.28% | 0.67% | 0.28% |
| 8 | Power Integrations, Inc. | 0.28% | 0.31% | 0.28% |
| 9 | Rush Enterprises, Inc. | 0.27% | 0.51% | 0.27% |
| 10 | Noble Corp. plc | 0.27% | 0.29% | 0.27% |
| 11 | Piper Sandler Cos. | 0.31% | 0.25% | 0.25% |
| 12 | Balchem Corp. | 0.31% | 0.25% | 0.25% |
Only in IWO
958 total- Moog, Inc. 0.73%
- BrightSpring Health Services, Inc. 0.68%
- Argan, Inc. 0.66%
- JFrog Ltd. 0.59%
- Krystal Biotech, Inc. 0.58%
- ESCO Technologies, Inc. 0.56%
- FirstCash Holdings, Inc. 0.53%
- D-Wave Quantum, Inc. 0.53%
- StoneX Group, Inc. 0.52%
- Praxis Precision Medicines, Inc. 0.51%
Only in VIOV
287 total- Paycom Software Inc 1.07%
- Match Group Inc 1.03%
- Jackson Financial Inc 1.01%
- CarMax Inc 0.94%
- Eastman Chemical Co 0.90%
- Conagra Brands Inc 0.83%
- Lamb Weston Holdings Inc 0.82%
- Lincoln National Corp 0.78%
- Matson Inc 0.74%
- Mohawk Industries Inc 0.71%
Related comparisons
More comparisons with IWO
- IWO vs IJS · iShares S&P Small-Cap 600 Value ETF 17.7%
- IWO vs VB · Vanguard Morningstar Small-Cap ETF 15.5%
- IWO vs AVUV · Avantis US Small Cap Value ETF 14.5%
- IWO vs DFAT · DFA U.S. Targeted Value Portfolio-ETF Class Shares 11.8%
- IWO vs IWN · iShares Russell 2000 Value ETF 10.8%
- IWO vs VBR · Vanguard Morningstar Small-Cap Value ETF 10.2%
More comparisons with VIOV
- VIOV vs VBR · Vanguard Morningstar Small-Cap Value ETF 17.2%
- VIOV vs VB · Vanguard Morningstar Small-Cap ETF 13.0%
- VIOV vs CALF · Pacer US Small Cap Cash Cows 100 ETF 12.8%
- VIOV vs VBK · Vanguard Morningstar Small-Cap Growth ETF 7.5%
- VIOV vs VYM · Vanguard High Dividend Yield Index Fund ETF Shares 1.8%
- VIOV vs ITOT · iShares Core S&P Total U.S. Stock Market ETF 1.8%
Percentages are holdings overlap with the named fund.
Open IWO or VIOV at a brokerage
Both funds trade commission-free at major US brokerages.
Affiliate links — opening an account through these earns PlainIndex a one-time referral. Scoring is computed before any affiliate consideration; see our methodology and funding disclosure.
Holdings overlap is the sum of min(weight_a, weight_b) over positions
matched on ISIN (CUSIP fallback). Methodology: see
/methodology/.
Comparing two funds doesn't endorse swapping one for the other. Tax-lot history, account type, and personal goals matter — PlainIndex publishes data and methodology, not investment advice.