ETF comparison
IWO vs VIOG
Both US Small Cap.
iShares Russell 2000 Growth ETF · Vanguard S&P Small-Cap 600 Growth Index Fund ETF Shares
Holdings overlap
230 positions appear in both funds. Buying equal dollars of IWO and VIOG would leave roughly 37.5% 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
VIOG 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 VIOG.
Top shared holdings
230 shared in total| # | Holding | In IWO | In VIOG | Overlap |
|---|---|---|---|---|
| 1 | Argan, Inc. | 0.66% | 0.68% | 0.66% |
| 2 | ESCO Technologies, Inc. | 0.56% | 0.82% | 0.56% |
| 3 | StoneX Group, Inc. | 0.52% | 0.83% | 0.52% |
| 4 | Ryman Hospitality Properties, Inc. | 0.48% | 1.00% | 0.48% |
| 5 | Glaukos Corp. | 0.48% | 0.84% | 0.48% |
| 6 | TG Therapeutics, Inc. | 0.48% | 0.82% | 0.48% |
| 7 | Federal Signal Corp. | 0.47% | 0.82% | 0.47% |
| 8 | MYR Group, Inc. | 0.47% | 0.52% | 0.47% |
| 9 | Zurn Elkay Water Solutions Corp. | 0.46% | 0.82% | 0.46% |
| 10 | Enpro, Inc. | 0.46% | 0.72% | 0.46% |
| 11 | Kodiak Gas Services, Inc. | 0.45% | 0.66% | 0.45% |
| 12 | Protagonist Therapeutics, Inc. | 0.45% | 1.03% | 0.45% |
Only in IWO
903 total- Moog, Inc. 0.73%
- BrightSpring Health Services, Inc. 0.68%
- JFrog Ltd. 0.59%
- Krystal Biotech, Inc. 0.58%
- FirstCash Holdings, Inc. 0.53%
- D-Wave Quantum, Inc. 0.53%
- Praxis Precision Medicines, Inc. 0.51%
- Cipher Digital, Inc. 0.50%
- EnerSys 0.49%
- HealthEquity, Inc. 0.46%
Only in VIOG
121 total- Corcept Therapeutics Inc 1.25%
- Viasat Inc 1.05%
- FormFactor Inc 0.90%
- Etsy Inc 0.89%
- Armstrong World Industries Inc 0.85%
- Madison Square Garden Sports Corp 0.80%
- Lyft Inc 0.74%
- John Bean Technologies Corp 0.70%
- Everus Construction Group Inc 0.68%
- Virtu Financial Inc 0.62%
Related comparisons
More comparisons with IWO
- IWO vs IJT · iShares S&P Small-Cap 600 Growth ETF 37.2%
- IWO vs SCHA · Schwab U.S. Small-Cap ETF 33.8%
- IWO vs DFAS · DFA U.S. Small Cap Portfolio-ETF Class Shares 28.3%
- IWO vs FNDA · Schwab Fundamental U.S. Small Company ETF 21.0%
- IWO vs VBK · Vanguard Morningstar Small-Cap Growth ETF 20.7%
- IWO vs VIOV · Vanguard S&P Small-Cap 600 Value Index Fund ETF Shares 17.8%
More comparisons with VIOG
- VIOG vs BBSC · JPMorgan BetaBuilders U.S. Small Cap Equity ETF 35.9%
- VIOG vs VTWO · Vanguard Russell 2000 Index Fund ETF Shares 31.5%
- VIOG vs IWM · iShares Russell 2000 ETF 31.4%
- VIOG vs VIOV · Vanguard S&P Small-Cap 600 Value Index Fund ETF Shares 28.8%
- VIOG vs IJS · iShares S&P Small-Cap 600 Value ETF 26.5%
- VIOG vs SCHA · Schwab U.S. Small-Cap ETF 23.5%
Percentages are holdings overlap with the named fund.
Open IWO or VIOG 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.