Index 500 Stock Portfolio
NORTHWESTERN MUTUAL SERIES FUND INC
Fund classification
Classified from what the fund holds · as of 2026 Q2
Index 500 Stock Portfolio is a U.S. equity index fund that tracks the Standard & Poor's 500 Composite Stock Price Index. 21% of Index 500 Stock Portfolio’s stock holdings are in companies whose revenue grew in the top quartile of U.S. companies over the last five fiscal years (covering 97% of the fund’s equity).
- Asset class
- Equity
- Region
- United States
- Management
- Index (passive)
- Fund type
- Open-end fund
Fund profile
As filed in the prospectus · 2026 Q2
The investment objective of the Portfolio is to achieve investment results that approximate the performance of the Standard & Poors 500 Composite Stock Price Index (S&P 500 Index).
The fund employs a full replication strategy, holding all or substantially all stocks in the S&P 500 Index in the same proportions as their weightings in the index. The fund uses equity index futures and exchange-traded funds for cash management to remain fully invested while maintaining necessary cash balances. Because the fund holds all index constituents, its returns will track the index performance, though cash flow timing may cause minor deviations.
| Share class | Gross | Net |
|---|---|---|
| C000000078 | 0.21% | 0.19% |
Net is what a holder pays after the adviser's contractual waiver; gross is before it. A waiver can expire.
Portfolio turnover 2.00% · as of 2026 Q2
Allocation
Asset groups · long / short shown separately, never netted · 2026 Q2
| Stocks | 99.42% |
| Derivatives | -0.00% |
The outer band is exposure held short — written against the portfolio rather than part of it, which is why it sits outside the ring and why the two are never netted into one figure.
Derivatives are shown at market value, not notional exposure.
Sector allocation
The same holdings as Allocation above, grouped by market sector instead of asset type · as of 2026 Q2
| Information Technology | 37.5% |
| Financials | 11.5% |
| Communication Services | 9.7% |
| Consumer Discretionary | 9.3% |
| 8 smaller | 32.1% |
Government, Securitized and Cash are non-corporate buckets; International is foreign holdings we don’t sector-classify, and Other is the residual (held funds, unresolved names).
Portfolio growth profile
How much of the fund’s stock holdings are in fast-growing companies · as of 2026 Q2
Share of the fund’s equity (by value) in companies whose trailing five-year revenue — or net-income — growth ranks in the top 25% of U.S. public companies. Foreign and newly-listed holdings are excluded, so the figure covers only part of the book. From SEC filings — not investment advice. How we measure this.
Latest quarter
What changed since the fund's previous filing
Return profile
Total return as filed — price change plus distributions reinvested · trailing figures to Apr 2026
May 2026 and Jun 2026 have been filed since the trailing figures were struck, so they are not in the table above or the curve — every figure here shares one cut-off, which is what makes them comparable with other funds.
Holdings
By % of NAV · equity positions carry filed share counts · every resolvable issuer links to its company page
| Ticker | Issuer | %NAV | Reported price | Value | Shares |
|---|---|---|---|---|---|
| NVDA | NVIDIA CorpNVDA | 7.48% | $200.09 | $609.21M | 3.0M |
| AAPL | Apple IncAAPL | 6.56% | $289.36 | $534.24M | 1.8M |
| MSFT | Microsoft CorpMSFT | 4.27% | $373.02 | $348.33M | 933.8K |
| AMZN | Amazon.com IncAMZN | 3.60% | $238.34 | $293.29M | 1.2M |
| GOOGL | Alphabet IncGOOGL | 3.23% | $357.37 | $263.42M | 737.1K |
| AVGO | Broadcom IncAVGO | 2.76% | $377.75 | $224.83M | 595.2K |
| GOOG | Alphabet IncGOOG | 2.58% | $353.33 | $209.93M | 594.1K |
| MU | Micron Technology IncMU | 2.01% | $1,154.29 | $163.64M | 141.8K |
| META | Meta Platforms IncMETA | 1.91% | $563.29 | $155.39M | 275.9K |
| TSLA | Tesla IncTSLA | 1.83% | $420.60 | $148.85M | 353.9K |
Reported price is the fund's own reported value divided by its own reported shares at 2026-06-30 — not a live quote, and not what the fund paid.
Top 10 positions are 36.21% of net assets, top 25 50.90%, across 502 issuers.
See more of this fund's book
More positions with filed share counts, and the quarter-over-quarter change list rather than the largest few — free with an account, no card required.
Sign in free