ETF comparison
IWR vs VB
US Mid Cap vs US Small Cap.
iShares Russell Mid-Cap ETF · Vanguard Morningstar Small-Cap ETF
Holdings overlap
593 positions appear in both funds. Buying equal dollars of IWR and VB would leave roughly 45.2% 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 15 bps cheaper than IWR. On a $100,000 position that's about $150/yr more in fees for IWR.
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 IWR vs VB.
Top shared holdings
593 shared in total| # | Holding | In IWR | In VB | Overlap |
|---|---|---|---|---|
| 1 | Astera Labs, Inc. | 0.53% | 0.45% | 0.45% |
| 2 | Flex Ltd. | 0.43% | 0.36% | 0.36% |
| 3 | Credo Technology Group Holding Ltd. | 0.32% | 0.55% | 0.32% |
| 4 | Jabil, Inc. | 0.29% | 0.49% | 0.29% |
| 5 | Natera, Inc. | 0.27% | 0.45% | 0.27% |
| 6 | EMCOR Group, Inc. | 0.26% | 0.45% | 0.26% |
| 7 | Revolution Medicines, Inc. | 0.26% | 0.46% | 0.26% |
| 8 | Twilio, Inc. | 0.22% | 0.38% | 0.22% |
| 9 | MKS, Inc. | 0.22% | 0.37% | 0.22% |
| 10 | Carpenter Technology Corp. | 0.22% | 0.35% | 0.22% |
| 11 | NRG Energy, Inc. | 0.21% | 0.37% | 0.21% |
| 12 | Tapestry, Inc. | 0.21% | 0.36% | 0.21% |
Only in IWR
231 total- Datadog, Inc. 0.62%
- Snowflake, Inc. 0.61%
- Royal Caribbean Cruises Ltd. 0.58%
- Cloudflare, Inc. 0.56%
- Robinhood Markets, Inc. 0.56%
- Teradyne, Inc. 0.55%
- Marathon Petroleum Corp. 0.54%
- Simon Property Group, Inc. 0.52%
- United Rentals, Inc. 0.51%
- Coherent Corp. 0.50%
Only in VB
716 total- Moog Inc 0.15%
- Hut 8 Corp 0.14%
- Viasat Inc 0.14%
- Cytokinetics Inc 0.14%
- BrightSpring Health Services Inc 0.14%
- MaxLinear Inc 0.13%
- Argan Inc 0.13%
- Krystal Biotech Inc 0.13%
- UMB Financial Corp 0.12%
- CareTrust REIT Inc 0.12%
Related comparisons
More comparisons with IWR
- IWR vs SCHM · Schwab U.S. Mid-Cap ETF 34.3%
- IWR vs IWP · iShares Russell Mid-Cap Growth ETF 34.1%
- IWR vs BBMC · JPMorgan BetaBuilders U.S. Mid Cap Equity ETF 31.4%
- IWR vs AVMV · Avantis U.S. Mid Cap Value ETF 28.8%
- IWR vs IWD · iShares Russell 1000 Value ETF 28.5%
- IWR vs VOT · Vanguard Morningstar Mid-Cap Growth ETF 24.8%
More comparisons with VB
- VB vs IWS · iShares Russell Mid-Cap Value ETF 45.2%
- VB vs MDY · State Street SPDR S&P MIDCAP 400 ETF Trust 43.6%
- VB vs IJH · iShares Core S&P Mid-Cap ETF 43.5%
- VB vs SPMD · State Street SPDR Portfolio S&P 400 Mid Cap ETF 43.5%
- VB vs IVOO · Vanguard S&P Mid-Cap 400 Index Fund ETF Shares 43.0%
- VB vs FNDA · Schwab Fundamental U.S. Small Company ETF 36.1%
Percentages are holdings overlap with the named fund.
Open IWR 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.