# EDGAR Filing Document

**Accession Number:** 0000742212
**File Stem:** 0001193125-25-154078
**Filing Date:** 2025-7
**Character Count:** 2551
**Document Hash:** c834bd6d23f519172b3b6472682ab1dc
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-25-154078.hdr.sgml**: 20250701

**ACCESSION NUMBER**: 0001193125-25-154078

**CONFORMED SUBMISSION TYPE**: 497K

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20250701

**DATE AS OF CHANGE**: 20250701

**EFFECTIVENESS DATE**: 20250701

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** NORTHWESTERN MUTUAL SERIES FUND INC
- **CENTRAL INDEX KEY:** 0000742212

**ORGANIZATION NAME:**
- **EIN:** 391603401
- **STATE OF INCORPORATION:** MD
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 497K
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 002-89971
- **FILM NUMBER:** 251097081

**BUSINESS ADDRESS:**
- **STREET 1:** 720 E WISCONSIN AVE
- **CITY:** MILWAUKEE
- **STATE:** WI
- **ZIP:** 53202
- **BUSINESS PHONE:** 4142992508

**MAIL ADDRESS:**
- **STREET 1:** 720 EAST WISCONSIN AVE
- **CITY:** MILWAUKEE
- **STATE:** WI
- **ZIP:** 53202

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** NORTHWESTERN MUTUAL VARIABLE LIFE SERIES FUND INC
- **DATE OF NAME CHANGE:** 19940830

## Series and Classes Contracts Data

### Mid Cap Growth Stock Portfolio (Series ID: S000000050)

| Class ID   | Class Name                     | Ticker Symbol   |
|:---|:---|:---|
| C000000085 | Mid Cap Growth Stock Portfolio |  |

**Northwestern Mutual Series Fund, Inc.** <br>**Mid Cap Growth Stock Portfolio**

Supplement Dated July 1, 2025 to the <br>Summary Prospectus for the Mid Cap Growth Stock Portfolio Dated May 1, 2025

The following information supplements the Summary Prospectus for the Mid Cap Growth Stock Portfolio of Northwestern Mutual Series Fund, Inc. (the "Fund") dated May 1, 2025 (the "Summary Prospectus"). You should read this Supplement together with the Summary Prospectus.

***<u>Portfolio Managers Update – Mid Cap Growth Stock Portfolio</u>***

Effective July 1, 2025, Michael Stein replaced Daniel Bloomgarden as co-portfolio manager for the Mid Cap Growth Stock Portfolio. Accordingly, the "Portfolio Managers" information set forth under the "Summary – PORTFOLIO MANAGEMENT" section is hereby deleted and replaced with the following:

"**Portfolio Managers**: *Felise L. Agranoff*, CFA, Managing Director of JPMIM and Portfolio Manager, joined JPMIM in 2004 and has co-managed the Portfolio since October 2024.

*Michael Stein*, CFA, Managing Director of JPMIM and Portfolio Manager, joined JPMIM in 2014 and has co-managed the Portfolio since May 2025 has co-managed the Portfolio since July 2025."

**Please retain this Supplement for future reference.**

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