ETF comparison
IWP vs VB
US Mid Cap vs US Small Cap.
iShares Russell Mid-Cap Growth ETF · Vanguard Small-Cap Index Fund ETF Shares
Holdings overlap
192 positions appear in both funds. Buying equal dollars of IWP and VB would leave roughly 17.2% of each dollar exposed to the same underlying securities.
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
192 shared in total| # | Holding | In IWP | In VB | Overlap |
|---|---|---|---|---|
| 1 | NRG Energy, Inc. | 1.08% | 0.43% | 0.43% |
| 2 | EMCOR Group, Inc. | 0.41% | 0.46% | 0.41% |
| 3 | Tapestry, Inc. | 0.95% | 0.40% | 0.40% |
| 4 | Jabil, Inc. | 0.65% | 0.37% | 0.37% |
| 5 | Natera, Inc. | 0.95% | 0.37% | 0.37% |
| 6 | FTAI Aviation Ltd. | 0.90% | 0.35% | 0.35% |
| 7 | Comfort Systems USA, Inc. | 1.73% | 0.34% | 0.34% |
| 8 | AST SpaceMobile, Inc. | 0.60% | 0.30% | 0.30% |
| 9 | Everpure, Inc. | 0.57% | 0.26% | 0.26% |
| 10 | Rocket Lab Corp. | 1.13% | 0.26% | 0.26% |
| 11 | Insmed, Inc. | 1.15% | 0.25% | 0.25% |
| 12 | Astera Labs, Inc. | 0.51% | 0.22% | 0.22% |
Only in IWP
87 total- BlackRock Funds III 4.34%
- Vertiv Holdings Co. 3.43%
- Howmet Aerospace, Inc. 3.32%
- Royal Caribbean Cruises Ltd. 2.51%
- Hilton Worldwide Holdings, Inc. 2.49%
- Cloudflare, Inc. 2.33%
- Quanta Services, Inc. 2.25%
- Cencora, Inc. 2.07%
- Targa Resources Corp. 1.92%
- Vistra Corp. 1.83%
Only in VB
1,119 total- Atmos Energy Corp 0.43%
- TechnipFMC PLC 0.39%
- Ciena Corp 0.38%
- Expand Energy Corp 0.37%
- United Therapeutics Corp 0.36%
- Curtiss-Wright Corp 0.35%
- Flex Ltd 0.34%
- Omnicom Group Inc 0.33%
- Coherent Corp 0.31%
- Royal Gold Inc 0.30%
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.