S&P 500 Index Master Portfolio
Data updated: 2026-05-28
C000012007 — S&P 500 Index Master Portfolio data: holdings, portfolio allocation, expenses, performance, cashflows, risk and SEC filings. United States Large Cap Equity · $51.91B AUM · 17.7% 1-yr return. From SEC regulatory filings.
C000012007 Fund Overview
S&P 500 Index Master Portfolio is a US mutual fund managed by Master Investment Portfolio, categorised as United States Large Cap Equity. ABC INVEST provides holdings, performance, costs, cashflows, risk data, prospectus documents and SEC filings, sourced from SEC filings.
- Type: US mutual fund
- Manager: Master Investment Portfolio
- Category: United States Large Cap Equity
- Assets under management: $51.91B
- 1-year return: 17.7%
- SEC CIK: 0000915092
- SEC series ID: S000004285
- Share class ID: C000012007
C000012007 Holdings
Top 10 holdings of S&P 500 Index Master Portfolio by percentage of net assets, from the fund's latest SEC N-PORT filing.
| Holding | % of net assets |
|---|---|
| NVIDIA Corp | 7.44% |
| Apple Inc | 6.54% |
| Microsoft Corp | 4.83% |
| Amazon.com Inc | 3.57% |
| Alphabet Inc | 2.94% |
| Broadcom Inc | 2.57% |
| Alphabet Inc | 2.36% |
| Meta Platforms Inc | 2.19% |
| Tesla Inc | 1.84% |
| Berkshire Hathaway Inc | 1.54% |
C000012007 Portfolio Allocation
Asset-class allocation of S&P 500 Index Master Portfolio by percentage of net assets, from the latest SEC N-PORT filing.
| Asset class | Allocation |
|---|---|
| Equity | 99.1% |
| Cash & Equivalents | 1.0% |
C000012007 Performance
Total returns for C000012007 (as of 2026-08-01), from SEC filings.
| Period | Total return |
|---|---|
| YTD | -4.4% |
| 1 year | 17.7% |
| 3 years (annualised) | 18.3% |
| 5 years (annualised) | 12.0% |
C000012007 Risk Information
Risk metrics for C000012007, derived from monthly returns in SEC filings.
- 1-year volatility (annualised): 10.3%
C000012007 Costs and Fees
- Brokerage commissions: 0.09 bps of average net assets (SEC N-CEN)
C000012007 Cashflows
Over the 12 months to 2026-03, S&P 500 Index Master Portfolio had net outflows of $812.51M, from monthly SEC N-PORT filings.
| Month | Net flow |
|---|---|
| 2026-03 | $919.88M |
| 2026-02 | $104.80M |
| 2026-01 | −$311.98M |
| 2025-12 | −$554.09M |
| 2025-11 | −$222.54M |
| 2025-10 | $783.69M |
C000012007 Debt Constituents
No individual debt constituents are reported in S&P 500 Index Master Portfolio's latest SEC N-PORT filing.
C000012007 Prospectus and SEC Filings
Official S&P 500 Index Master Portfolio filings on SEC EDGAR — prospectus, portfolio holdings and annual reports.
Related Funds
Other United States Large Cap 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.