ETF comparison
VO vs VOO
US Mid Cap vs US Large Cap.
Holdings overlap
248 positions appear in both funds. Buying equal dollars of VO and VOO would leave roughly 16.4% 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
Expense ratios are effectively identical (0.030% vs 0.030%).
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 VO vs VOO.
Top shared holdings
248 shared in total| # | Holding | In VO | In VOO | Overlap |
|---|---|---|---|---|
| 1 | Western Digital Corp | 1.06% | 0.34% | 0.34% |
| 2 | Seagate Technology Holdings PLC | 1.05% | 0.34% | 0.34% |
| 3 | Vertiv Holdings Co | 1.22% | 0.20% | 0.20% |
| 4 | Quanta Services Inc | 1.04% | 0.17% | 0.17% |
| 5 | Howmet Aerospace Inc | 1.04% | 0.17% | 0.17% |
| 6 | Newmont Corp | 0.48% | 0.15% | 0.15% |
| 7 | Cummins Inc | 0.95% | 0.15% | 0.15% |
| 8 | Fortinet Inc | 0.46% | 0.15% | 0.15% |
| 9 | Williams Cos Inc/The | 0.44% | 0.14% | 0.14% |
| 10 | Johnson Controls International plc | 0.43% | 0.14% | 0.14% |
| 11 | Datadog Inc | 0.83% | 0.13% | 0.13% |
| 12 | Constellation Energy Corp | 0.78% | 0.12% | 0.12% |
Only in VO
34 total- Bloom Energy Corp 0.79%
- Cloudflare Inc 0.76%
- Rocket Lab Corp 0.57%
- Cheniere Energy Inc 0.48%
- Ferguson Enterprises Inc 0.45%
- Waste Connections Inc 0.41%
- Snowflake Inc 0.41%
- Alnylam Pharmaceuticals Inc 0.39%
- Coreweave Inc 0.37%
- Astera Labs Inc 0.36%
Only in VOO
256 total- NVIDIA Corp 7.51%
- Apple Inc 6.59%
- Microsoft Corp 4.30%
- Amazon.com Inc 3.62%
- Alphabet Inc 3.25%
- Broadcom Inc 2.77%
- Alphabet Inc 2.59%
- Micron Technology Inc 2.02%
- Meta Platforms Inc 1.92%
- Tesla Inc 1.84%
Related comparisons
More comparisons with VO
More comparisons with VOO
- VOO vs SPLV · Invesco S&P 500 Low Volatility ETF 16.4%
- VOO vs MOAT · VanEck Morningstar Wide Moat ETF 14.7%
- VOO vs SDY · State Street SPDR S&P Dividend ETF 14.1%
- VOO vs IWR · iShares Russell Mid-Cap ETF 13.3%
- VOO vs VLUE · iShares MSCI USA Value Factor ETF 13.2%
- VOO vs IWS · iShares Russell Mid-Cap Value ETF 11.5%
Percentages are holdings overlap with the named fund.
Open VO or VOO 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.