ETF comparison
IWB vs VO
US Large Cap vs US Mid Cap.
Holdings overlap
276 positions appear in both funds. Buying equal dollars of IWB and VO would leave roughly 16.2% 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
VO is 12 bps cheaper than IWB. On a $100,000 position that's about $120/yr more in fees for IWB.
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 IWB vs VO.
Top shared holdings
276 shared in total| # | Holding | In IWB | In VO | Overlap |
|---|---|---|---|---|
| 1 | WESTERN DIGITAL CORPORATION | 0.31% | 1.06% | 0.31% |
| 2 | VERTIV HOLDINGS CO | 0.19% | 1.22% | 0.19% |
| 3 | QUANTA SERVICES, INC. | 0.15% | 1.04% | 0.15% |
| 4 | HOWMET AEROSPACE INC. | 0.15% | 1.04% | 0.15% |
| 5 | NEWMONT CORPORATION | 0.14% | 0.48% | 0.14% |
| 6 | CUMMINS INC. | 0.14% | 0.95% | 0.14% |
| 7 | FORTINET, INC. | 0.13% | 0.46% | 0.13% |
| 8 | THE WILLIAMS COMPANIES, INC. | 0.13% | 0.44% | 0.13% |
| 9 | JOHNSON CONTROLS INTERNATIONAL PUBLIC LIMITED COMPANY | 0.13% | 0.43% | 0.13% |
| 10 | SNOWFLAKE INC. | 0.12% | 0.41% | 0.12% |
| 11 | DATADOG, INC. | 0.12% | 0.83% | 0.12% |
| 12 | BLOOM ENERGY CORPORATION | 0.12% | 0.79% | 0.12% |
Only in IWB
748 total- NVIDIA CORPORATION 6.72%
- APPLE INC. 6.03%
- MICROSOFT CORPORATION 3.99%
- AMAZON.COM, INC. 3.33%
- ALPHABET INC. 3.00%
- BROADCOM INC. 2.53%
- ALPHABET INC. 2.42%
- MICRON TECHNOLOGY, INC. 1.87%
- META PLATFORMS, INC. 1.78%
- TESLA, INC. 1.77%
Only in VO
6 total- Seagate Technology Holdings PLC 1.05%
- TE Connectivity PLC 0.57%
- Waste Connections Inc 0.41%
- Cerebras Systems Inc 0.06%
- Symbotic Inc 0.01%
- Venture Global Inc 0.01%
Related comparisons
More comparisons with IWB
- IWB vs VB · Vanguard Morningstar Small-Cap ETF 9.2%
- IWB vs SCHD · Schwab U.S. Dividend Equity ETF 7.3%
- IWB vs IJH · iShares Core S&P Mid-Cap ETF 4.6%
- IWB vs IJR · iShares Core S&P Small-Cap ETF 0.4%
- IWB vs IWM · iShares Russell 2000 ETF 0.0%
- IWB vs ITOT · iShares Core S&P Total U.S. Stock Market ETF 94.8%
More comparisons with VO
- VO vs SCHK · Schwab 1000 ETF 16.1%
- VO vs VTI · Vanguard Morningstar Total Stock Market ETF 16.0%
- VO vs VONE · Vanguard Russell 1000 Index Fund ETF Shares 15.8%
- VO vs ITOT · iShares Core S&P Total U.S. Stock Market ETF 15.8%
- VO vs SCHB · Schwab U.S. Broad Market ETF 15.6%
- VO vs SPY · State Street SPDR S&P 500 ETF Trust 15.5%
Percentages are holdings overlap with the named fund.
Open IWB 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.