ETF comparison
IWO vs VB
Both US Small Cap.
iShares Russell 2000 Growth ETF · Vanguard Morningstar Small-Cap ETF
Holdings overlap
402 positions appear in both funds. Buying equal dollars of IWO and VB would leave roughly 15.5% 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
VB is 21 bps cheaper than IWO. On a $100,000 position that's about $210/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 VB.
Top shared holdings
402 shared in total| # | Holding | In IWO | In VB | Overlap |
|---|---|---|---|---|
| 1 | Moog, Inc. | 0.73% | 0.15% | 0.15% |
| 2 | Hut 8 Corp. | 0.38% | 0.14% | 0.14% |
| 3 | BrightSpring Health Services, Inc. | 0.68% | 0.14% | 0.14% |
| 4 | MaxLinear, Inc. | 0.66% | 0.13% | 0.13% |
| 5 | Argan, Inc. | 0.66% | 0.13% | 0.13% |
| 6 | Krystal Biotech, Inc. | 0.58% | 0.13% | 0.13% |
| 7 | Cipher Digital, Inc. | 0.50% | 0.12% | 0.12% |
| 8 | JFrog Ltd. | 0.59% | 0.11% | 0.11% |
| 9 | Praxis Precision Medicines, Inc. | 0.51% | 0.11% | 0.11% |
| 10 | Riot Platforms, Inc. | 0.39% | 0.11% | 0.11% |
| 11 | Compass, Inc. | 0.45% | 0.11% | 0.11% |
| 12 | ESCO Technologies, Inc. | 0.56% | 0.11% | 0.11% |
Only in IWO
731 total- Kulicke & Soffa Industries, Inc. 0.42%
- Ultra Clean Holdings, Inc. 0.38%
- Definium Therapeutics, Inc. 0.36%
- Xenon Pharmaceuticals, Inc. 0.35%
- Enova International, Inc. 0.35%
- Scholar Rock Holding Corp. 0.35%
- Liquidia Corp. 0.34%
- Perimeter Solutions, Inc. 0.32%
- Travere Therapeutics, Inc. 0.30%
- CECO Environmental Corp. 0.29%
Only in VB
907 total- Credo Technology Group Holding Ltd 0.55%
- Jabil Inc 0.49%
- REVOLUTION Medicines Inc 0.46%
- Astera Labs Inc 0.45%
- Natera Inc 0.45%
- EMCOR Group Inc 0.45%
- Twilio Inc 0.38%
- NRG Energy Inc 0.37%
- MKS Instruments Inc 0.37%
- Flex Ltd 0.36%
Related comparisons
More comparisons with IWO
- IWO vs DFAT · 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%
- IWO vs DFSV · DFA U.S. Small Cap Value Portfolio – ETF Class Shares 6.5%
- IWO vs CALF · Pacer US Small Cap Cash Cows 100 ETF 6.2%
- IWO vs IJH · iShares Core S&P Mid-Cap ETF 4.4%
More comparisons with VB
- VB vs IWN · iShares Russell 2000 Value ETF 14.9%
- VB vs AVLV · Avantis US Large Cap Value ETF 14.0%
- VB vs VONV · Vanguard Russell 1000 Value Index Fund ETF Shares 13.6%
- VB vs IWD · iShares Russell 1000 Value ETF 13.4%
- VB vs FNDX · Schwab Fundamental U.S. Large Company ETF 13.4%
- VB vs IJS · iShares S&P Small-Cap 600 Value ETF 13.2%
Percentages are holdings overlap with the named fund.
Open IWO or VB 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.