Vanguard S&P 500 ETF
Low-cost ETF tracking the S&P 500 index; overtook SPY in 2025 to become the largest ETF share class by assets. The size shown here is the whole fund across all four of its classes, which is a larger number measuring a different thing. Known for an ultra-low expense ratio.
- Listing
- VOO on NYSE Arca MIC ARCX
- Type
- ETF
- Manager
- Vanguard
- Strategy
- S&P 500 index tracking
- Domicile
- United States
- Size
- $1.4tn — net assets of the whole series, all share classes, as reported at 2026-03-31
Share classes of the same fund
Vanguard 500 Index FundSEC series S000002839 · VANGUARD INDEX FUNDS
| Class | Ticker | SEC class id |
|---|---|---|
| Institutional Select Shares | VFFSX | C000170274 |
| Admiral Shares | VFIAX | C000007774 |
| Investor Shares | VFINX | C000007773 |
| ETF Shares this page | VOO | C000092055 |
These are not different funds. They are one portfolio sold on different terms — the same holdings, the same manager, different minimums and fee schedules, and in Vanguard’s case the ETF is itself a share class of the mutual fund. A comparison that treats VOO and VFFSX as rivals is comparing a fund with itself.
Series and class identifiers and their names come from the SEC’s Investment Company Series and Class report — the registry that assigns them, not our own naming. This fund tracks S&P 500, which is a covered asset here.
Where the size figure comes from
| Reported | $1.4tn |
| What it counts | net assets of the whole series, all share classes |
| As of | 2026-03-31 |
| Source | SEC N-PORT data set |
| Fund LEI | 12WZ1W76P8QD4VJ6OB47 |
This counts every share class of the fund, which is what the filing reports. Our earlier figure of $750bn was the VOO class on its own. Both are true and they are not the same quantity — a fund files for the whole portfolio, while a quote screen shows one class of it.
Holdings — top holdings, approx.
NVIDIA · Microsoft · Apple · Amazon · Meta Platforms · Broadcom · Alphabet · Tesla · Berkshire Hathaway · JPMorgan Chase
Compiled by Finance Foundation from the fund’s own published holdings disclosures as of Q2 2026 (seed-0.7 · marketcap-1 · 2026-08-30), ranked by the fund’s stated portfolio weight. Only holdings that are themselves covered entities are shown, so this is a subset of the top holdings, not the full portfolio, and no weights or share counts are published. Fund portfolios turn over — check the manager’s own disclosure for a current list. Sources.
Approximate reference values from public sources · seed-0.7 · marketcap-1 · 2026-08-30 · not real-time. See data & methodology.
JSONCSV No key, CORS enabled — paste any of these straight into a notebook.