ETF comparison
IWP vs VB
US Mid Cap vs US Small Cap.
iShares Russell Mid-Cap Growth ETF · Vanguard Morningstar Small-Cap ETF
Holdings overlap
181 positions appear in both funds. Buying equal dollars of IWP and VB would leave roughly 21.6% 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 20 bps cheaper than IWP. On a $100,000 position that's about $200/yr more in fees for IWP.
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 IWP vs VB.
Top shared holdings
181 shared in total| # | Holding | In IWP | In VB | Overlap |
|---|---|---|---|---|
| 1 | Credo Technology Group Holding Ltd. | 1.23% | 0.55% | 0.55% |
| 2 | Jabil, Inc. | 1.10% | 0.49% | 0.49% |
| 3 | Revolution Medicines, Inc. | 0.98% | 0.46% | 0.46% |
| 4 | Astera Labs, Inc. | 2.02% | 0.45% | 0.45% |
| 5 | Natera, Inc. | 1.01% | 0.45% | 0.45% |
| 6 | EMCOR Group, Inc. | 1.00% | 0.45% | 0.45% |
| 7 | NRG Energy, Inc. | 0.81% | 0.37% | 0.37% |
| 8 | Tapestry, Inc. | 0.81% | 0.36% | 0.36% |
| 9 | Casey's General Stores, Inc. | 0.71% | 0.36% | 0.36% |
| 10 | Carpenter Technology Corp. | 0.81% | 0.35% | 0.35% |
| 11 | Curtiss-Wright Corp. | 0.39% | 0.34% | 0.34% |
| 12 | FTAI Aviation Ltd. | 0.75% | 0.34% | 0.34% |
Only in IWP
85 total- Datadog, Inc. 2.34%
- Snowflake, Inc. 2.33%
- Cloudflare, Inc. 2.12%
- Teradyne, Inc. 2.07%
- Simon Property Group, Inc. 1.96%
- Comfort Systems USA, Inc. 1.89%
- Robinhood Markets, Inc. 1.75%
- Lumentum Holdings, Inc. 1.67%
- Targa Resources Corp. 1.56%
- Rocket Lab Corp. 1.49%
Only in VB
1,128 total- Flex Ltd 0.36%
- Atmos Energy Corp 0.35%
- Illumina Inc 0.31%
- Moderna Inc 0.30%
- Smurfit Westrock PLC 0.29%
- F5 Inc 0.29%
- United Therapeutics Corp 0.28%
- Okta Inc 0.28%
- US Foods Holding Corp 0.27%
- JB Hunt Transport Services Inc 0.27%
Related comparisons
More comparisons with IWP
- IWP vs SCHM · Schwab U.S. Mid-Cap ETF 20.4%
- IWP vs SPMD · State Street SPDR Portfolio S&P 400 Mid Cap ETF 20.0%
- IWP vs IJH · iShares Core S&P Mid-Cap ETF 20.0%
- IWP vs IJK · iShares S&P Mid-Cap 400 Growth ETF 19.0%
- IWP vs AVMV · Avantis U.S. Mid Cap Value ETF 18.3%
- IWP vs IVOO · Vanguard S&P Mid-Cap 400 Index Fund ETF Shares 18.1%
More comparisons with VB
- 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%
- VB vs SPSM · State Street SPDR Portfolio S&P 600 Small Cap ETF 19.0%
- VB vs IJR · iShares Core S&P Small-Cap ETF 19.0%
- VB vs VIOO · Vanguard S&P Small-Cap 600 Index Fund ETF Shares 18.8%
Percentages are holdings overlap with the named fund.
Open IWP 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.