Index 500 Stock Portfolio
Data updated: 2026-05-27
C000000078 — Index 500 Stock Portfolio data: holdings, portfolio allocation, expenses, performance, cashflows, risk and SEC filings. United States Large Cap Blend / Core Equity · $7.12B AUM · 0.19% expense ratio · 17.6% 1-yr return. From SEC regulatory filings.
C000000078 Fund Overview
Index 500 Stock Portfolio is a US mutual fund managed by Northwestern Mutual Series Fund INC, 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: Northwestern Mutual Series Fund INC
- Category: United States Large Cap Blend / Core Equity
- Assets under management: $7.12B
- 1-year return: 17.6%
- SEC CIK: 0000742212
- SEC series ID: S000000043
- Share class ID: C000000078
C000000078 Holdings
Top 10 holdings of Index 500 Stock Portfolio by percentage of net assets, from the fund's latest SEC N-PORT filing.
| Holding | % of net assets |
|---|---|
| NVIDIA Corp | 7.54% |
| Apple Inc | 6.63% |
| Microsoft Corp | 4.89% |
| Amazon.com Inc | 3.62% |
| Alphabet Inc | 2.98% |
| Broadcom Inc | 2.61% |
| Alphabet Inc | 2.39% |
| Meta Platforms Inc | 2.23% |
| Tesla Inc | 1.86% |
| Berkshire Hathaway Inc | 1.56% |
C000000078 Portfolio Allocation
Asset-class allocation of Index 500 Stock Portfolio by percentage of net assets, from the latest SEC N-PORT filing.
| Asset class | Allocation |
|---|---|
| Equity | 99.5% |
C000000078 Performance
Total returns for C000000078 (as of 2026-08-01), from SEC filings.
| Period | Total return |
|---|---|
| YTD | -4.4% |
| 1 year | 17.6% |
| 3 years (annualised) | 18.1% |
| 5 years (annualised) | 11.8% |
C000000078 Risk Information
Risk metrics for C000000078, derived from monthly returns in SEC filings.
- 1-year volatility (annualised): 10.3%
C000000078 Costs and Fees
C000000078 costs about $19 per $10,000 invested per year in fund expenses.
- Net expense ratio: 0.19%
- Gross expense ratio: 0.21%
- Portfolio turnover: 2%
- Brokerage commissions: 0.04 bps of average net assets (SEC N-CEN)
C000000078 Cashflows
Over the 12 months to 2026-03, Index 500 Stock Portfolio had net inflows of $113.91M, from monthly SEC N-PORT filings.
| Month | Net flow |
|---|---|
| 2026-03 | $3.89M |
| 2026-02 | −$7.83M |
| 2026-01 | −$23.63M |
| 2025-12 | −$17.30M |
| 2025-11 | −$30.33M |
| 2025-10 | −$31.85M |
C000000078 Debt Constituents
No individual debt constituents are reported in Index 500 Stock Portfolio's latest SEC N-PORT filing.
C000000078 Prospectus and SEC Filings
Official Index 500 Stock Portfolio filings on SEC EDGAR — prospectus, portfolio holdings and annual reports.
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.