ETF comparison
IVOO vs VO
Both US Mid Cap.
Vanguard S&P Mid-Cap 400 Index Fund ETF Shares · Vanguard Morningstar Mid-Cap ETF
Holdings overlap
2 positions appear in both funds. Buying equal dollars of IVOO and VO would leave roughly 0.4% 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 4 bps cheaper than IVOO. On a $100,000 position that's about $40/yr more in fees for IVOO.
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 IVOO vs VO.
Top shared holdings
2 shared in total| # | Holding | In IVOO | In VO | Overlap |
|---|---|---|---|---|
| 1 | Flex Ltd | 1.58% | 0.29% | 0.29% |
| 2 | Burlington Stores Inc | 0.57% | 0.10% | 0.10% |
Only in IVOO
398 total- Twilio Inc 0.82%
- TechnipFMC PLC 0.79%
- Curtiss-Wright Corp 0.79%
- nVent Electric PLC 0.77%
- Sterling Infrastructure Inc 0.75%
- XPO Inc 0.72%
- Everpure Inc 0.71%
- Illumina Inc 0.71%
- United Therapeutics Corp 0.68%
- ATI Inc 0.68%
Only in VO
280 total- Vertiv Holdings Co 1.22%
- Western Digital Corp 1.06%
- Seagate Technology Holdings PLC 1.05%
- Quanta Services Inc 1.04%
- Howmet Aerospace Inc 1.04%
- Cummins Inc 0.95%
- Datadog Inc 0.83%
- Bloom Energy Corp 0.79%
- Constellation Energy Corp 0.78%
- Robinhood Markets Inc 0.77%
Related comparisons
More comparisons with IVOO
More comparisons with VO
- VO vs IQLT · iShares MSCI Intl Quality Factor ETF 0.2%
- VO vs DFAT · U.S. Targeted Value Portfolio-ETF Class Shares 0.2%
- VO vs IGRO · iShares International Dividend Growth ETF 0.2%
- VO vs IJH · iShares Core S&P Mid-Cap ETF 0.1%
- VO vs IJJ · iShares S&P Mid-Cap 400 Value ETF 0.1%
- VO vs IJK · iShares S&P Mid-Cap 400 Growth ETF 0.1%
Percentages are holdings overlap with the named fund.
Open IVOO 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.