VINIX — Vanguard Institutional Index Fund
Data updated: 2026-08-28
VINIX — Vanguard Institutional Index Fund. United States Large Cap Blend / Core Equity · $350.31B AUM. Holdings, fees, performance and SEC filings.
VINIX Fund Overview
VINIX — Vanguard Institutional Index Fund is a US mutual fund managed by Vanguard Institutional Index Funds, categorised as United States Large Cap Blend / Core Equity. ABC INVEST provides holdings, performance, costs, cashflows, risk data, prospectus documents and SEC filings, sourced from SEC filings.
- Type: US mutual fund
- Manager: Vanguard Institutional Index Funds
- Category: United States Large Cap Blend / Core Equity
- Assets under management: $350.31B
- 1-year return: 22.3%
- Ticker: VINIX
- SEC CIK: 0000862084
- SEC series ID: S000002853
- Share class ID: C000007825
VINIX Holdings
Top 10 holdings of Vanguard Institutional Index Fund by percentage of net assets, from the fund's latest SEC N-PORT filing.
| Holding | % of net assets |
|---|---|
| NVIDIA Corp | 7.51% |
| Apple Inc | 6.59% |
| Microsoft Corp | 4.29% |
| 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 | 1.83% |
VINIX Portfolio Allocation
Asset-class allocation of Vanguard Institutional Index Fund by percentage of net assets, from the latest SEC N-PORT filing.
| Asset class | Allocation |
|---|---|
| Equity | 99.7% |
| Cash & Equivalents | 0.2% |
VINIX Performance
Total returns for VINIX (as of 2026-09-01), from SEC filings.
| Period | Total return |
|---|---|
| YTD | 10.2% |
| 1 year | 22.3% |
| 3 years (annualised) | 20.6% |
| 5 years (annualised) | 13.4% |
VINIX Risk Information
Risk metrics for VINIX, derived from monthly returns in SEC filings.
- 1-year volatility (annualised): 13.1%
VINIX Costs and Fees
VINIX costs about $4 per $10,000 invested per year in fund expenses.
- Net expense ratio: 0.04%
- Gross expense ratio: 0.04%
- Portfolio turnover: 4%
- Brokerage commissions: 0.05 bps of average net assets (SEC N-CEN)
VINIX Cashflows
Over the 12 months to 2026-06, Vanguard Institutional Index Fund had net outflows of $30.10B, from monthly SEC N-PORT filings.
| Month | Net flow |
|---|---|
| 2026-06 | −$2.55B |
| 2026-05 | −$2.69B |
| 2026-04 | −$6.33B |
| 2026-03 | $1.71B |
| 2026-02 | −$2.25B |
| 2026-01 | −$2.22B |
VINIX Debt Constituents
No individual debt constituents are reported in Vanguard Institutional Index Fund's latest SEC N-PORT filing.
VINIX Prospectus and SEC Filings
Official Vanguard Institutional Index Fund filings on SEC EDGAR — prospectus, portfolio holdings and annual reports.
- Prospectus (485BPOS) — filed 2026-04-28
- Prospectus (485BPOS) — filed 2025-04-29
- Prospectus (485BPOS) — filed 2024-04-26
- Portfolio holdings (N-PORT) — filed 2026-08-28
- Portfolio holdings (N-PORT) — filed 2026-05-28
- Portfolio holdings (N-PORT) — filed 2026-02-26
- Annual census (N-CEN) — filed 2026-03-12
- Annual census (N-CEN) — filed 2025-03-13
Related Funds
Other United States Large Cap Blend / Core Equity funds tracked on ABC INVEST:
Data Sources
ABC INVEST compiles this page from public filings made to the U.S. Securities and Exchange Commission (SEC) through EDGAR: portfolio holdings and monthly cashflows from Form N-PORT, expenses and returns from fund prospectuses (Form 485BPOS) and the SEC DERA Risk/Return Summary data sets, annual data from Form N-CEN, and shareholder reports from Form N-CSR.