Index 400 Stock Portfolio
Data updated: 2026-05-27
C000000089 — Index 400 Stock Portfolio data: holdings, portfolio allocation, expenses, performance, cashflows, risk and SEC filings. United States Mid Cap Blend / Core Equity · $1.50B AUM · 0.24% expense ratio · 17.0% 1-yr return. From SEC regulatory filings.
C000000089 Fund Overview
Index 400 Stock Portfolio is a US mutual fund managed by Northwestern Mutual Series Fund INC, categorised as United States Mid 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 Mid Cap Blend / Core Equity
- Assets under management: $1.50B
- 1-year return: 17.0%
- SEC CIK: 0000742212
- SEC series ID: S000000054
- Share class ID: C000000089
C000000089 Holdings
Top 10 holdings of Index 400 Stock Portfolio by percentage of net assets, from the fund's latest SEC N-PORT filing.
| Holding | % of net assets |
|---|---|
| TechnipFMC PLC | 0.86% |
| Casey's General Stores Inc | 0.83% |
| United Therapeutics Corp | 0.79% |
| Curtiss-Wright Corp | 0.78% |
| Flex Ltd | 0.74% |
| XPO Inc | 0.70% |
| Woodward Inc | 0.66% |
| Royal Gold Inc | 0.64% |
| US Foods Holding Corp | 0.63% |
| Burlington Stores Inc | 0.63% |
C000000089 Portfolio Allocation
Asset-class allocation of Index 400 Stock Portfolio by percentage of net assets, from the latest SEC N-PORT filing.
| Asset class | Allocation |
|---|---|
| Equity | 98.7% |
| Cash & Equivalents | 0.1% |
C000000089 Performance
Total returns for C000000089 (as of 2026-08-01), from SEC filings.
| Period | Total return |
|---|---|
| YTD | 2.4% |
| 1 year | 17.0% |
| 3 years (annualised) | 11.8% |
| 5 years (annualised) | 6.6% |
C000000089 Risk Information
Risk metrics for C000000089, derived from monthly returns in SEC filings.
- 1-year volatility (annualised): 10.7%
C000000089 Costs and Fees
C000000089 costs about $24 per $10,000 invested per year in fund expenses.
- Net expense ratio: 0.24%
- Gross expense ratio: 0.28%
- Portfolio turnover: 15%
- Brokerage commissions: 0.06 bps of average net assets (SEC N-CEN)
C000000089 Cashflows
Over the 12 months to 2026-03, Index 400 Stock Portfolio had net inflows of $76.12M, from monthly SEC N-PORT filings.
| Month | Net flow |
|---|---|
| 2026-03 | −$7.31M |
| 2026-02 | −$8.49M |
| 2026-01 | −$6.20M |
| 2025-12 | −$3.34M |
| 2025-11 | −$2.11M |
| 2025-10 | −$2.86M |
C000000089 Debt Constituents
No individual debt constituents are reported in Index 400 Stock Portfolio's latest SEC N-PORT filing.
C000000089 Prospectus and SEC Filings
Official Index 400 Stock Portfolio filings on SEC EDGAR — prospectus, portfolio holdings and annual reports.
Related Funds
Other United States Mid 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.