ETF comparison
IWP vs VO
Both US Mid Cap.
iShares Russell Mid-Cap Growth ETF · Vanguard Mid-Cap Index Fund ETF Shares
Holdings overlap
87 positions appear in both funds. Buying equal dollars of IWP and VO would leave roughly 25.1% 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
VO 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 VO.
Top shared holdings
87 shared in total| # | Holding | In IWP | In VO | Overlap |
|---|---|---|---|---|
| 1 | Vertiv Holdings Co. | 3.43% | 1.03% | 1.03% |
| 2 | Howmet Aerospace, Inc. | 3.32% | 1.01% | 1.01% |
| 3 | Quanta Services, Inc. | 2.25% | 0.89% | 0.89% |
| 4 | Royal Caribbean Cruises Ltd. | 2.51% | 0.73% | 0.73% |
| 5 | Cloudflare, Inc. | 2.33% | 0.68% | 0.68% |
| 6 | Cencora, Inc. | 2.07% | 0.63% | 0.63% |
| 7 | Cheniere Energy, Inc. | 0.98% | 0.62% | 0.62% |
| 8 | Targa Resources Corp. | 1.92% | 0.59% | 0.59% |
| 9 | Fastenal Co. | 1.57% | 0.58% | 0.58% |
| 10 | Vistra Corp. | 1.83% | 0.55% | 0.55% |
| 11 | Monolithic Power Systems, Inc. | 1.82% | 0.55% | 0.55% |
| 12 | Cardinal Health, Inc. | 0.91% | 0.54% | 0.54% |
Only in IWP
192 total- BlackRock Funds III 4.34%
- NRG Energy, Inc. 1.08%
- Tapestry, Inc. 0.95%
- Natera, Inc. 0.95%
- FTAI Aviation Ltd. 0.90%
- Coupang, Inc. 0.89%
- Jabil, Inc. 0.65%
- AST SpaceMobile, Inc. 0.60%
- Restaurant Brands International, Inc. 0.58%
- Everpure, Inc. 0.57%
Only in VO
202 total- Western Digital Corp 1.00%
- Constellation Energy Corp 0.94%
- Seagate Technology Holdings PLC 0.93%
- SLB Ltd 0.84%
- Cummins Inc 0.81%
- Valero Energy Corp 0.80%
- Marathon Petroleum Corp 0.78%
- Motorola Solutions Inc 0.78%
- CRH PLC 0.77%
- General Motors Co 0.73%
Open IWP or VO 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.