# Short-Term Bond Portfolio

Short-Term Bond Portfolio is a registered fund series of NORTHWESTERN MUTUAL SERIES FUND INC (series S000018233). Net assets $400.4M as of 2026-03-31.

## Profile

- Series ID: S000018233
- Registrant: NORTHWESTERN MUTUAL SERIES FUND INC
- LEI: BEEDB5U9NNUVQYFFEL15
- Net assets: $400.4M
- Total assets: $403.7M
- As of: 2026-03-31

## Advisers

- [T. Rowe Price Associates, Inc. (Subadvisor)](https://search.stillhousedata.com/firm/105496)
- [Mason Street Advisors, LLC (Advisor)](https://search.stillhousedata.com/firm/114085)

## Top holdings (200 reported)

_Showing 15 of 200 holdings by value._

| Holding | Ticker | Value | % of fund |
| --- | --- | --- | --- |
| [United States Treasury](https://search.stillhousedata.com/security/91282CGH8) | — | $42.7M | 1067.29% |
| [United States Treasury](https://search.stillhousedata.com/security/91282CPS4) | — | $15.8M | 395.53% |
| [United States Treasury](https://search.stillhousedata.com/security/91282CQH7) | — | $14.0M | 350.79% |
| [United States Treasury](https://search.stillhousedata.com/security/91282CNM9) | — | $5.7M | 141.65% |
| [SALESFORCE INC](https://search.stillhousedata.com/security/79466LAR5) | — | $2.2M | 55.31% |
| [Freddie Mac](https://search.stillhousedata.com/security/3142GVGD7) | — | $2.1M | 51.96% |
| [MEDLINE BORROWER LP](https://search.stillhousedata.com/security/62482BAA0) | — | $2.1M | 51.22% |
| [Fannie Mae](https://search.stillhousedata.com/security/3140XQ2C0) | — | $2.0M | 49.82% |
| [HEINEKEN NV](https://search.stillhousedata.com/security/423012AF0) | — | $1.9M | 48.54% |
| [Fannie Mae](https://search.stillhousedata.com/security/3140QVGT5) | — | $1.6M | 40.38% |
| [WELLS FARGO & COMPANY](https://search.stillhousedata.com/security/95000U3T8) | — | $1.6M | 38.92% |
| [ING GROEP NV](https://search.stillhousedata.com/security/456837BU6) | — | $1.4M | 35.62% |
| [MPLX LP](https://search.stillhousedata.com/security/55336VCA6) | — | $1.3M | 33.29% |
| [HCA Inc](https://search.stillhousedata.com/security/40412DEC9) | — | $1.2M | 31.06% |
| [AMAZON.COM INC](https://search.stillhousedata.com/security/023135DD5) | — | $1.2M | 30.86% |

## Net asset history

| Report date | Net assets |
| --- | --- |
| 2026-03-31 | $400.4M |
| 2025-12-31 | $402.2M |
| 2025-09-30 | $392.9M |
| 2025-06-30 | $391.2M |
| 2025-03-31 | $395.3M |
| 2024-12-31 | $390.2M |
| 2024-09-30 | $396.9M |
| 2024-06-30 | $383.4M |

## More

- [Registrant: NORTHWESTERN MUTUAL SERIES FUND INC](https://search.stillhousedata.com/registrant/742212)
- [This page as markdown (for LLM agents)](https://search.stillhousedata.com/fund/S000018233.md)
- [Search all SEC filings, advisers and people on Adviser Search](https://search.stillhousedata.com/)

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Source: public SEC filing data via Adviser Search (https://search.stillhousedata.com).
Agents: this data is also queryable via MCP tools and read-only SQL — see https://search.stillhousedata.com/llms.txt.