ETF comparison
IWM vs VB
Both US Small Cap.
iShares Russell 2000 ETF · Vanguard Morningstar Small-Cap ETF
Holdings overlap
686 positions appear in both funds. Buying equal dollars of IWM and VB would leave roughly 25.5% 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 16 bps cheaper than IWM. On a $100,000 position that's about $160/yr more in fees for IWM.
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 IWM vs VB.
Top shared holdings
686 shared in total| # | Holding | In IWM | In VB | Overlap |
|---|---|---|---|---|
| 1 | Moog, Inc. | 0.38% | 0.15% | 0.15% |
| 2 | Hut 8 Corp. | 0.37% | 0.14% | 0.14% |
| 3 | Viasat, Inc. | 0.35% | 0.14% | 0.14% |
| 4 | Cytokinetics, Inc. | 0.35% | 0.14% | 0.14% |
| 5 | BrightSpring Health Services, Inc. | 0.35% | 0.14% | 0.14% |
| 6 | MaxLinear, Inc. | 0.34% | 0.13% | 0.13% |
| 7 | Argan, Inc. | 0.34% | 0.13% | 0.13% |
| 8 | Krystal Biotech, Inc. | 0.30% | 0.13% | 0.13% |
| 9 | UMB Financial Corp. | 0.33% | 0.12% | 0.12% |
| 10 | CareTrust REIT, Inc. | 0.28% | 0.12% | 0.12% |
| 11 | Cipher Digital, Inc. | 0.26% | 0.12% | 0.12% |
| 12 | JFrog Ltd. | 0.31% | 0.11% | 0.11% |
Only in IWM
1,328 total- Kulicke & Soffa Industries, Inc. 0.21%
- Ultra Clean Holdings, Inc. 0.20%
- SSR Mining, Inc. 0.20%
- Garrett Motion, Inc. 0.20%
- Scholar Rock Holding Corp. 0.19%
- Definium Therapeutics, Inc. 0.19%
- Xenon Pharmaceuticals, Inc. 0.18%
- Enova International, Inc. 0.18%
- Liquidia Corp. 0.17%
- Perimeter Solutions, Inc. 0.17%
Only in VB
623 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 IWM
- IWM vs SMLF · iShares U.S. Small-Cap Equity Factor ETF 25.5%
- IWM vs VBK · Vanguard Morningstar Small-Cap Growth ETF 25.0%
- IWM vs SPMD · State Street SPDR Portfolio S&P 400 Mid Cap ETF 11.2%
- IWM vs IJH · iShares Core S&P Mid-Cap ETF 11.2%
- IWM vs IVOO · Vanguard S&P Mid-Cap 400 Index Fund ETF Shares 11.1%
- IWM vs MDY · State Street SPDR S&P MIDCAP 400 ETF Trust 11.0%
More comparisons with VB
- VB vs DFAC · U.S. Core Equity 2 Portfolio-ETF Class Shares 25.3%
- VB vs AVMV · Avantis U.S. Mid Cap Value ETF 22.7%
- VB vs IWP · iShares Russell Mid-Cap Growth ETF 21.6%
- VB vs DFUV · Dimensional US Marketwide Value ETF 20.9%
- VB vs DFSV · DFA U.S. Small Cap Value Portfolio – ETF Class Shares 20.5%
- VB vs RSP · Invesco S&P 500 Equal Weight ETF 19.0%
Percentages are holdings overlap with the named fund.
Open IWM 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.