ETF comparison
VB vs VIOO
Both US Small Cap.
Vanguard Morningstar Small-Cap ETF · Vanguard S&P Small-Cap 600 Index Fund ETF Shares
Holdings overlap
478 positions appear in both funds. Buying equal dollars of VB and VIOO would leave roughly 18.7% 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
VB is 4 bps cheaper than VIOO. On a $100,000 position that's about $40/yr more in fees for VIOO.
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 VB vs VIOO.
Top shared holdings
478 shared in total| # | Holding | In VB | In VIOO | Overlap |
|---|---|---|---|---|
| 1 | FormFactor Inc | 0.15% | 0.44% | 0.15% |
| 2 | Viasat Inc | 0.14% | 0.51% | 0.14% |
| 3 | Element Solutions Inc | 0.13% | 0.45% | 0.13% |
| 4 | MaxLinear Inc | 0.13% | 0.28% | 0.13% |
| 5 | Argan Inc | 0.13% | 0.33% | 0.13% |
| 6 | ESCO Technologies Inc | 0.11% | 0.40% | 0.11% |
| 7 | Match Group Inc | 0.11% | 0.53% | 0.11% |
| 8 | Alkermes PLC | 0.11% | 0.38% | 0.11% |
| 9 | Everus Construction Group Inc | 0.10% | 0.33% | 0.10% |
| 10 | StoneX Group Inc | 0.10% | 0.40% | 0.10% |
| 11 | Powell Industries Inc | 0.10% | 0.29% | 0.10% |
| 12 | Ralliant Corp | 0.10% | 0.39% | 0.10% |
Only in VB
831 total- Credo Technology Group Holding Ltd 0.55%
- Jabil Inc 0.49%
- REVOLUTION Medicines Inc 0.46%
- Astera Labs Inc 0.45%
- Natera Inc 0.45%
- EMCOR Group Inc 0.45%
- Twilio Inc 0.38%
- NRG Energy Inc 0.37%
- MKS Instruments Inc 0.37%
- Flex Ltd 0.36%
Only in VIOO
127 total- Gates Industrial Corp Ltd 0.36%
- Mobility Global Inc 0.34%
- Enova International Inc 0.32%
- Liquidia Corp 0.27%
- Kulicke & Soffa Industries Inc 0.23%
- Chefs' Warehouse Inc/The 0.23%
- Par Pacific Holdings Inc 0.22%
- Tutor Perini Corp 0.22%
- Dave Inc 0.21%
- NMI Holdings Inc 0.19%
Related comparisons
More comparisons with VB
More comparisons with VIOO
- VIOO vs VBK · Vanguard Morningstar Small-Cap Growth ETF 16.3%
- VIOO vs CALF · Pacer US Small Cap Cash Cows 100 ETF 12.1%
- VIOO vs ITOT · iShares Core S&P Total U.S. Stock Market ETF 2.5%
- VIOO vs VTI · Vanguard Morningstar Total Stock Market ETF 2.5%
- VIOO vs SCHB · Schwab U.S. Broad Market ETF 2.4%
- VIOO vs VYM · Vanguard High Dividend Yield Index Fund ETF Shares 2.0%
Percentages are holdings overlap with the named fund.
Open VB or VIOO 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.