# Inflation Managed Portfolio

Inflation Managed Portfolio is a registered fund series of NORTHWESTERN MUTUAL SERIES FUND INC (series S000018228). Net assets $419.8M as of 2026-03-31.

## Profile

- Series ID: S000018228
- Registrant: NORTHWESTERN MUTUAL SERIES FUND INC
- LEI: 7H3QOR3RFMEVIZ6XNZ82
- Net assets: $419.8M
- Total assets: $427.4M
- As of: 2026-03-31

## Advisers

- [American Century Investment Management, Inc. (Subadvisor)](https://search.stillhousedata.com/firm/105778)
- [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/91282CNS6) | — | $36.0M | 857.33% |
| [United States Treasury](https://search.stillhousedata.com/security/91282CCM1) | — | $19.9M | 473.38% |
| [United States Treasury](https://search.stillhousedata.com/security/91282CHP9) | — | $19.8M | 471.23% |
| [United States Treasury](https://search.stillhousedata.com/security/91282CLE9) | — | $18.3M | 435.40% |
| [United States Treasury](https://search.stillhousedata.com/security/912810RL4) | — | $13.0M | 309.93% |
| [United States Treasury](https://search.stillhousedata.com/security/91282CEZ0) | — | $11.4M | 270.42% |
| [United States Treasury](https://search.stillhousedata.com/security/91282CBF7) | — | $11.0M | 261.59% |
| [Regatta Funding Co LLC](https://search.stillhousedata.com/security/75888XD11) | — | $9.4M | 223.90% |
| [Hqla Funding LLC](https://search.stillhousedata.com/security/44333BD16) | — | $9.4M | 223.90% |
| [United States Treasury](https://search.stillhousedata.com/security/912810RF7) | — | $9.0M | 213.60% |
| [United States Treasury](https://search.stillhousedata.com/security/91282CDX6) | — | $8.7M | 207.54% |
| [United States Treasury](https://search.stillhousedata.com/security/91282CPU9) | — | $7.5M | 178.54% |
| [United States Treasury](https://search.stillhousedata.com/security/912810RA8) | — | $6.1M | 144.66% |
| [United States Treasury](https://search.stillhousedata.com/security/912810QV3) | — | $6.0M | 142.18% |
| [Government National Mortgage Association](https://search.stillhousedata.com/security/36179YDJ0) | — | $5.2M | 124.20% |

## Net asset history

| Report date | Net assets |
| --- | --- |
| 2026-03-31 | $419.8M |
| 2025-12-31 | $419.6M |
| 2025-09-30 | $421.7M |
| 2025-06-30 | $414.9M |
| 2025-03-31 | $417.6M |
| 2024-12-31 | $408.5M |
| 2024-09-30 | $422.7M |
| 2024-06-30 | $412.2M |

## 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/S000018228.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.