WFSPX — iShares S&P 500 Index Fund
Data updated: 2026-08-25
WFSPX — iShares S&P 500 Index Fund. United States Large Cap Blend / Core Equity · $59.06B AUM. Holdings, fees, performance and SEC filings.
WFSPX Fund Overview
WFSPX — iShares S&P 500 Index Fund is a US mutual fund managed by BlackRock Funds III, 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: BlackRock Funds III
- Category: United States Large Cap Blend / Core Equity
- Assets under management: $59.06B
- 1-year return: 22.2%
- Ticker: WFSPX
- SEC CIK: 0000893818
- SEC series ID: S000004272
- Share class ID: C000011979
WFSPX Holdings
Top 1 holdings of iShares S&P 500 Index Fund by percentage of net assets, from the fund's latest SEC N-PORT filing.
| Holding | % of net assets |
|---|---|
| Master Investment Portfolio | 100.41% |
WFSPX Portfolio Allocation
Asset-class allocation of iShares S&P 500 Index Fund by percentage of net assets, from the latest SEC N-PORT filing.
| Asset class | Allocation |
|---|---|
| Equity | 100.4% |
WFSPX Performance
Total returns for WFSPX (as of 2026-09-01), from SEC filings.
| Period | Total return |
|---|---|
| YTD | 10.2% |
| 1 year | 22.2% |
| 3 years (annualised) | 20.5% |
| 5 years (annualised) | 13.4% |
WFSPX Risk Information
Risk metrics for WFSPX, derived from monthly returns in SEC filings.
- 1-year volatility (annualised): 13.1%
WFSPX Costs and Fees
WFSPX costs about $3 per $10,000 invested per year in fund expenses.
- Net expense ratio: 0.03%
- Gross expense ratio: 0.03%
- Portfolio turnover: 14%
- Brokerage commissions: 0.00 bps of average net assets (SEC N-CEN)
WFSPX Cashflows
Over the 12 months to 2026-06, iShares S&P 500 Index Fund had net outflows of $170.21M, from monthly SEC N-PORT filings.
| Month | Net flow |
|---|---|
| 2026-06 | −$80.82M |
| 2026-05 | −$268.68M |
| 2026-04 | $493.88M |
| 2026-03 | $400.05M |
| 2026-02 | $111.36M |
| 2026-01 | −$342.57M |
WFSPX Debt Constituents
No individual debt constituents are reported in iShares S&P 500 Index Fund's latest SEC N-PORT filing.
WFSPX Prospectus and SEC Filings
Official iShares S&P 500 Index Fund filings on SEC EDGAR — prospectus, portfolio holdings and annual reports.
- Prospectus (485BPOS) — filed 2026-04-24
- Prospectus (485BPOS) — filed 2025-04-25
- Prospectus supplement (497) — filed 2026-02-23
- Portfolio holdings (N-PORT) — filed 2026-08-25
- Portfolio holdings (N-PORT) — filed 2026-05-28
- Portfolio holdings (N-PORT) — filed 2026-02-24
- Annual census (N-CEN) — filed 2026-03-16
- Annual census (N-CEN) — filed 2025-03-17
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.