ETF comparison
IWR vs VO
Both US Mid Cap.
iShares Russell Mid-Cap ETF · Vanguard Mid-Cap Index Fund ETF Shares
Holdings overlap
238 positions appear in both funds. Buying equal dollars of IWR and VO would leave roughly 58.2% 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
VO 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 VO.
Top shared holdings
238 shared in total| # | Holding | In IWR | In VO | Overlap |
|---|---|---|---|---|
| 1 | Vertiv Holdings Co. | 0.76% | 1.03% | 0.76% |
| 2 | Howmet Aerospace, Inc. | 0.73% | 1.01% | 0.73% |
| 3 | Western Digital Corp. | 0.73% | 1.00% | 0.73% |
| 4 | Quanta Services, Inc. | 0.64% | 0.89% | 0.64% |
| 5 | Valero Energy Corp. | 0.60% | 0.80% | 0.60% |
| 6 | Cummins, Inc. | 0.59% | 0.81% | 0.59% |
| 7 | Marathon Petroleum Corp. | 0.58% | 0.78% | 0.58% |
| 8 | Phillips 66 | 0.58% | 0.80% | 0.58% |
| 9 | Corning, Inc. | 0.84% | 0.57% | 0.57% |
| 10 | Royal Caribbean Cruises Ltd. | 0.55% | 0.73% | 0.55% |
| 11 | Ross Stores, Inc. | 0.55% | 0.76% | 0.55% |
| 12 | Cloudflare, Inc. | 0.51% | 0.68% | 0.51% |
Only in IWR
570 total- BlackRock Funds III 2.98%
- Sandisk Corp. 0.72%
- Bank of New York Mellon Corp. (The) 0.65%
- Anglogold Ashanti plc 0.39%
- EMCOR Group, Inc. 0.26%
- NRG Energy, Inc. 0.24%
- Atmos Energy Corp. 0.23%
- Tapestry, Inc. 0.23%
- TechnipFMC plc 0.22%
- Jabil, Inc. 0.22%
Only in VO
51 total- Constellation Energy Corp 0.94%
- Seagate Technology Holdings PLC 0.93%
- SLB Ltd 0.84%
- Motorola Solutions Inc 0.78%
- CRH PLC 0.77%
- General Motors Co 0.73%
- TransDigm Group Inc 0.71%
- TE Connectivity PLC 0.67%
- PACCAR Inc 0.66%
- Newmont Corp 0.64%
Open IWR 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.