Index 400 Stock Portfolio is a registered fund series of NORTHWESTERN MUTUAL SERIES FUND INC (series S000000054). Net assets $1.5B as of 2026-03-31. Index fund.
Showing 15 of 200 holdings by value.
| Holding | Ticker | Value | % of fund |
|---|---|---|---|
| TechnipFMC PLC | — | $13.0M | 86.43% |
| Casey's General Stores Inc | — | $12.5M | 83.40% |
| United Therapeutics Corp | — | $11.9M | 78.92% |
| Curtiss-Wright Corp | — | $11.7M | 77.62% |
| Flex Ltd | — | $11.2M | 74.40% |
| XPO Inc | — | $10.6M | 70.45% |
| Woodward Inc | — | $9.9M | 65.96% |
| Royal Gold Inc | — | $9.6M | 63.74% |
| US Foods Holding Corp | — | $9.5M | 62.86% |
| Burlington Stores Inc | — | $9.4M | 62.54% |
| ATI Inc | — | $9.2M | 61.09% |
| MasTec Inc | — | $9.2M | 61.00% |
| Carpenter Technology Corp | — | $9.1M | 60.69% |
| nVent Electric PLC | — | $8.9M | 59.00% |
| Twilio Inc | — | $8.9M | 58.97% |
| Report date | Net assets |
|---|---|
| 2026-03-31 | $1.5B |
| 2025-12-31 | $1.5B |
| 2025-09-30 | $1.5B |
| 2025-06-30 | $1.4B |
| 2025-03-31 | $1.3B |
| 2024-12-31 | $1.4B |
| 2024-09-30 | $1.4B |
| 2024-06-30 | $1.3B |