Compare
2 share classes of Vanguard 500 Index Fund, side by side on every metric on file. 13 of 99 differ — fees, returns, holdings, sector exposure and tracking.
These are share classes of the same fund (series S000002839). They hold identical securities in identical weights, so every holdings, sector, concentration and asset-mix row below matches by construction. The comparison that means anything is fees, minimums and share-class returns — the rest is one portfolio wearing two wrappers.
Both funds are share classes of one portfolio, so they hold identical securities in identical weights. Only the wrapper differs — the fee, the minimum, and the returns those produce.
VOO is the cheapest at 0.03% a year and VFIAX the most expensive at 0.04% — a gap of about $1.00 per $10,000 invested, every year.
Over the past year VFIAX returned the most at 19.2%, against 18.6% for VOO. Those are price returns — distributions are not in them — and last year says nothing about the next one.
| Metric | VFIAX Vanguard 500 Index Fund | VOO Vanguard 500 Index Fund |
|---|---|---|
| Profile | ||
| Category | Equity | Equity |
| Tags | Index Fund | Index Fund |
| Geography | US | US |
| Family | VANGUARD INDEX FUNDS | VANGUARD INDEX FUNDS |
| Structure | Lends Securities | Lends Securities |
| Fees | ||
| AFFE | — | — |
| Gross Expense | 0.04% | 0.03% |
| Min. Investment | $3.0K | $3.0K |
| Net Expense | 0.04% | 0.03% |
| Size | ||
| AUM | $1.42T | $1.42T |
| Returns | ||
| 2021 | 28.7% | 28.7% |
| 2022 | -18.2% | -18.2% |
| 2023 | 26.2% | 26.3% |
| 2024 | 25.0% | 25.0% |
| 2025 | 17.8% | 17.8% |
| 10Y Ann. (Prospectus) | 14.8% | — |
| 5Y Ann. (Prospectus) | 14.4% | — |
| Since Inception (Prospectus) | — | — |
| Worst Quarter (Prospectus) | -19.6% | -19.6% |
| 1M | 4.38% | 3.86% |
| 1Y | 19.2% | 18.6% |
| 3M | 2.78% | 1.92% |
| 3Y Ann. | 20.3% | 20.2% |
| 5Y Ann. | 11.4% | 11.3% |
| 6M | 12.3% | 12.1% |
| YTD | 13.1% | 12.8% |
| Total 12M | 17.8% | 17.8% |
| Total 1M | -4.98% | -4.98% |
| Total 3M | -4.35% | -4.34% |
| Total 6M | -1.82% | -1.81% |
| Market Cap | ||
| Large Cap | 34.4% | 34.4% |
| Cap Coverage | 96.2% | 96.2% |
| Mega Cap | 65.3% | 65.3% |
| Micro Cap | 0.02% | 0.02% |
| Mid Cap | 0.27% | 0.27% |
| Size Style | Large Cap | Large Cap |
| Small Cap | 0.00% | 0.00% |
| Avg Mkt Cap | $1.62T | $1.62T |
| Valuation | ||
| Look-Through Yield | 1.04% | 1.04% |
| EV/EBITDA | 15.78 | 15.78 |
| P/E | 25.08 | 25.08 |
| P/S | 3.53 | 3.53 |
| Asset Mix | ||
| Derivatives | 0.03% | 0.03% |
| Equity | 99.9% | 99.9% |
| Fixed Income | 0.00% | 0.00% |
| Fund & Cash | 0.05% | 0.05% |
| Other Assets | 0.00% | 0.00% |
| Sector | ||
| Basic Materials | 1.90% | 1.90% |
| Communication Services | 1.36% | 1.36% |
| Consumer Discretionary | 8.43% | 8.43% |
| Consumer Staples | 4.44% | 4.44% |
| Energy | 3.32% | 3.32% |
| Financial Services | 10.5% | 10.5% |
| Healthcare | 8.83% | 8.83% |
| Industrials | 7.83% | 7.83% |
| Other / Unclass. | 6.13% | 6.13% |
| Real Estate | 1.36% | 1.36% |
| Technology | 44.6% | 44.6% |
| Utilities | 1.37% | 1.37% |
| Top Sector | Technology | Technology |
| Top Sector % | 47.5% | 47.5% |
| Bond Character | ||
| Corporate | 99.9% | 99.9% |
| Municipal | 0.00% | 0.00% |
| Non-US Sovereign | 0.00% | 0.00% |
| Agency & GSE | 0.00% | 0.00% |
| Treasury | 0.00% | 0.00% |
| Geography | ||
| US Weight | 97.8% | 97.8% |
| Top Country | United States | United States |
| Portfolio | ||
| Holdings | 506 | 506 |
| Short | 0.00% | 0.00% |
| Concentration | ||
| Effective Holdings | 48 | 48 |
| Top 10 | 37.6% | 37.6% |
| Largest Position | 7.55% | 7.55% |
| Top Holding | NVIDIA Corp.NVDA | NVIDIA Corp.NVDA |
| Flows | ||
| Positive Months | 77.8% | 77.8% |
| Flow 12M % | -7.82% | -7.82% |
| Flow 12M | -$111.18B | -$111.18B |
| Flow 1M % | -0.78% | -0.78% |
| Flow 3M % | 1.17% | 1.17% |
| Cost of Ownership | ||
| Fund Age | 10.2 | 10.2 |
| Turnover | 2.00% | 2.00% |
| Risk | ||
| Spread HY | — | — |
| Spread IG | — | — |
| DV01 10Y | — | — |
| Liabilities % | 0.14% | 0.14% |
| Tracking Diff. | -0.17% | -0.17% |
| Tracking Error | 0.01% | 0.01% |
| Identity | ||
| CIK | 1004655 | 1004655 |
| Class ID | C000007774 | C000092055 |
| Share Class | Admiral Shares | ETF Shares |
| Data | Holdings, Flows, AUM, Returns, Profile, Prices | Holdings, Flows, AUM, Returns, Profile, Prices |
| Flows Date | 31 Mar 2026 | 31 Mar 2026 |
| Portfolio Date | 31 Jul 2026 | 31 Jul 2026 |
| AUM Date | 31 Mar 2026 | 31 Mar 2026 |
| Price Date | 27 Aug 2026 | 28 Aug 2026 |
| Returns Date | 28 Apr 2026 | 28 Apr 2026 |
| Prospectus Date | 28 Apr 2026 | 28 Apr 2026 |
| Series ID | S000002839 | S000002839 |
| Total Ret. Date | 31 Mar 2026 | 31 Mar 2026 |
Yes. VOO charges 0.03% a year against 0.04% for VFIAX — about $1.00 a year on every $10,000 invested. The fee is deducted from the fund's assets daily, so it is already inside every return figure on this page rather than billed separately.
They are the same portfolio in different wrappers — share classes of series S000002839, holding identical securities in identical weights. What differs is the fee, the minimum, how you buy it, and the returns those produce. Every holdings, sector and concentration row below matches by construction, not by coincidence.
Over the last twelve months VFIAX returned 19.2% and VOO returned 18.6%. Those are price returns measured to the last close on file and exclude distributions, so a fund paying a larger yield looks worse on this line than it was. Past performance is not a forecast, and one year is a short window.
Nothing stops you, but check the overlap first: the sector and holdings rows below show how much of each portfolio is the same securities in the same weights. Two funds tracking the same index are one position held twice, not diversification. This page reports the numbers and does not give investment advice.