ETF comparison
IWO vs VBK
Both US Small Cap.
iShares Russell 2000 Growth ETF · Vanguard Morningstar Small-Cap Growth ETF
Holdings overlap
241 positions appear in both funds. Buying equal dollars of IWO and VBK would leave roughly 20.7% 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
VBK is 19 bps cheaper than IWO. On a $100,000 position that's about $190/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 VBK.
Top shared holdings
241 shared in total| # | Holding | In IWO | In VBK | Overlap |
|---|---|---|---|---|
| 1 | Hut 8 Corp. | 0.38% | 0.33% | 0.33% |
| 2 | BrightSpring Health Services, Inc. | 0.68% | 0.32% | 0.32% |
| 3 | MaxLinear, Inc. | 0.66% | 0.31% | 0.31% |
| 4 | Argan, Inc. | 0.66% | 0.30% | 0.30% |
| 5 | Krystal Biotech, Inc. | 0.58% | 0.29% | 0.29% |
| 6 | Cipher Digital, Inc. | 0.50% | 0.27% | 0.27% |
| 7 | JFrog Ltd. | 0.59% | 0.26% | 0.26% |
| 8 | Riot Platforms, Inc. | 0.39% | 0.26% | 0.26% |
| 9 | ESCO Technologies, Inc. | 0.56% | 0.25% | 0.25% |
| 10 | Alkermes plc | 0.42% | 0.25% | 0.25% |
| 11 | StoneX Group, Inc. | 0.52% | 0.24% | 0.24% |
| 12 | Vaxcyte, Inc. | 0.29% | 0.24% | 0.24% |
Only in IWO
892 total- Moog, Inc. 0.73%
- FirstCash Holdings, Inc. 0.53%
- Praxis Precision Medicines, Inc. 0.51%
- Plexus Corp. 0.49%
- EnerSys 0.49%
- Zurn Elkay Water Solutions Corp. 0.46%
- Enpro, Inc. 0.46%
- Compass, Inc. 0.45%
- Archrock, Inc. 0.43%
- Kulicke & Soffa Industries, Inc. 0.42%
Only in VBK
302 total- Credo Technology Group Holding Ltd 1.27%
- REVOLUTION Medicines Inc 1.06%
- Astera Labs Inc 1.05%
- Natera Inc 1.04%
- Twilio Inc 0.88%
- Casey's General Stores Inc 0.83%
- Carpenter Technology Corp 0.82%
- Curtiss-Wright Corp 0.79%
- FTAI Aviation Ltd 0.78%
- nVent Electric PLC 0.77%
Related comparisons
More comparisons with IWO
- IWO vs FNDA · Schwab Fundamental U.S. Small Company ETF 20.4%
- IWO vs IJS · iShares S&P Small-Cap 600 Value ETF 17.7%
- IWO vs VIOV · Vanguard S&P Small-Cap 600 Value Index Fund ETF Shares 17.3%
- IWO vs AVUV · Avantis US Small Cap Value ETF 16.9%
- IWO vs VB · Vanguard Morningstar Small-Cap ETF 15.5%
- IWO vs DFAT · U.S. Targeted Value Portfolio-ETF Class Shares 11.8%
More comparisons with VBK
- VBK vs VIOO · Vanguard S&P Small-Cap 600 Index Fund ETF Shares 17.0%
- VBK vs SPSM · State Street SPDR Portfolio S&P 600 Small Cap ETF 16.5%
- VBK vs IJR · iShares Core S&P Small-Cap ETF 16.4%
- VBK vs VIOG · Vanguard S&P Small-Cap 600 Growth Index Fund ETF Shares 15.4%
- VBK vs IJT · iShares S&P Small-Cap 600 Growth ETF 14.6%
- VBK vs VIOV · Vanguard S&P Small-Cap 600 Value Index Fund ETF Shares 7.6%
Percentages are holdings overlap with the named fund.
Open IWO or VBK 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.