# EDGAR Filing Document

**Accession Number:** 0000742212
**File Stem:** 0001752724-25-192568
**Filing Date:** 2025-8
**Character Count:** 17949
**Document Hash:** 5601cc9c1082de0fde5f1ae73690f950
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001752724-25-192568.hdr.sgml**: 20250819

**ACCESSION NUMBER**: 0001752724-25-192568

**CONFORMED SUBMISSION TYPE**: NPORT-P

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20250630

**FILED AS OF DATE**: 20250819

**DATE AS OF CHANGE**: 20250819

**PERIOD START**: 20251231

**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:** NPORT-P
- **SEC ACT:** 1940 Act
- **SEC FILE NUMBER:** 811-03990
- **FILM NUMBER:** 251231250

**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

### Active/Passive Moderate Portfolio (Series ID: S000000044)

| Class ID   | Class Name                        | Ticker Symbol   |
|:---|:---|:---|
| C000000079 | Active/Passive Moderate Portfolio |  |

## Form NPORT-P: Monthly Portfolio Investments Report

### NPORT-P: Part A: General Information

**Item A.1. Information about the Registrant.**

- **a. Name of Registrant:** NORTHWESTERN MUTUAL SERIES FUND INC

- **b. Investment Company Act file number:** 811-03990

- **c. CIK number of Registrant:** 0000742212

- **d. LEI of Registrant:** 549300T1UBX7MDSNZA55

- **e. Address and telephone number of Registrant.**

  - **Street Address 1:** 720 E WISCONSIN AVE

  - **City:** MILWAUKEE

  - **State:** WI

  - **Foreign country:** US

  - **Zip / Postal Code:** 53202

  - **Telephone number:** 414-271-1444

**Item A.2. Information about the Series.**

- **a. Name of Series:** Asset Allocation Portfolio

- **b. EDGAR series identifier (if any):** S000000044

- **c. LEI of Series:** 5DD2LVSRPBY8KFA02K39

**Item A.3. Reporting period.**

- **a. Date of fiscal year-end:** 2025-12-31

- **b. Date as of which information is reported:** 2025-06-30

**Item A.4. Final filing**

Does the Fund anticipate that this will be its final filing on Form N-PORT? **No**

### Fund Information

**Total Assets:** $282650936.57

**Total Liabilities:** $336473.87

**Net Assets:** $282314462.70

**Cash Not Reported:** $4618828.76

**Monthly Return Information**

| Class               | Month 1 Return (%)   | Month 2 Return (%)   | Month 3 Return (%)   |
|:---|:---|:---|:---|
| Class ID C000000079 | -0.18%               | 3.21%                | 3.11%                |

**Monthly Gains & Losses**

| Period   | Net Realized Gain/Loss   | Net Unrealized Appreciation/Depreciation   |
|:---|:---|:---|
| Month 1  | $-106155.22              | $-879.77                                   |
| Month 2  | $1989428.35              | $6391331.67                                |
| Month 3  | $1173968.65              | $6482735.90                                |

**Designated Index Information**

- **Index Name:** Asset Allocation Portfolio Blended Composite Benchmark

- **Index Identifier:** SPXT, SPTRMDCP, SPTRSMCP, NDDUEAFE, NDUEEGF, DWRTFT, BCOMTR, LBUSTRUU, G0O1

### Schedule of Portfolio Investments

| Name                                                                      | Title                                                                                                   | Identifiers                                   | Payoff Profile   | Asset Category   | Issuer Category   | Country   |   Balance | Units   | Value (USD)   | % of Net Assets   | Maturity Date   | Coupon Type   | Annualized Rate (%)   | Restricted?   |   Fair Value Level | Lending Status   |
|:---|:---|:---|:---|:---|:---|:---|---:|:---|:---|:---|:---|:---|:---|:---|---:|:---|
| JPMorgan Ultra-Short Income ETF                                           | JPMorgan Ultra-Short Income ETF                                                                         | CUSIP: 46641Q837<br>LEI: 549300VN24B8TQAGGX74 | Long             | EC               | RF                | US        |     28100 | NS      | $1424108.00   | 0.50%             |  |  |  | No            |                  1 | On Loan: No      |
| Northwestern Mutual Series Fund, Inc. - International Growth Portfolio    | International Growth Portfolio                                                                          | CUSIP: 668140684<br>LEI: A7EFFZCFPQNSS1P3HZ68 | Long             | EC               | RF                | US        |   4401618 | NS      | $9701165.39   | 3.44%             |  |  |  | No            |                  1 | On Loan: No      |
| Northwestern Mutual Series Fund, Inc. - Domestic Equity Portfolio         | DOMESTIC EQUITY PORTFOLIO                                                                               | CUSIP: 668140791<br>LEI: 5493004TKKI7X6F71K84 | Long             | EC               | RF                | US        |   7232246 | NS      | $11282303.75  | 4.00%             |  |  |  | No            |                  1 | On Loan: No      |
| Northwestern Mutual Series Fund, Inc. - Focused Appreciation Portfolio    | FOCUSED APPRECIATION PORTFOLIO                                                                          | CUSIP: 668140775<br>LEI: 5493007QO6Z6UMWHLZ04 | Long             | EC               | RF                | US        |   2332491 | NS      | $11858383.89  | 4.20%             |  |  |  | No            |                  1 | On Loan: No      |
| iShares Core U.S. Aggregate Bond ETF                                      | iShares Core U.S. Aggregate Bond ETF                                                                    | CUSIP: 464287226<br>LEI: 549300F7VSXTKBGHJE47 | Long             | EC               | RF                | US        |    215400 | NS      | $21367680.00  | 7.57%             |  |  |  | No            |                  1 | On Loan: No      |
| iShares MSCI Intl Quality Factor ETF                                      | iShares MSCI Intl Quality Factor ETF                                                                    | CUSIP: 46434V456<br>LEI: 549300NCBUPWCYENVS18 | Long             | EC               | RF                | US        |    129100 | NS      | $5579702.00   | 1.98%             |  |  |  | No            |                  1 | On Loan: No      |
| Schwab U.S. REIT ETF                                                      | Schwab U.S. REIT ETF                                                                                    | CUSIP: 808524847<br>LEI: 549300OLDKO120DR6467 | Long             | EC               | RF                | US        |    188900 | NS      | $3997124.00   | 1.42%             |  |  |  | No            |                  1 | On Loan: No      |
| Northwestern Mutual Series Fund, Inc. - Select Bond Portfolio             | Select Bond Portfolio                                                                                   | CUSIP: 668140759<br>LEI: 03DZ35VFRGD62UKLL347 | Long             | EC               | RF                | US        |  44674941 | NS      | $50303984.08  | 17.82%            |  |  |  | No            |                  1 | On Loan: No      |
| abrdn Bloomberg All Commodity Strategy K-1 Free ETF                       | abrdn Bloomberg All Commodity Strategy K-1 Free ETF                                                     | CUSIP: 003261104<br>LEI: 549300PWXO8WGDSMS419 | Long             | EC               | RF                | US        |     46500 | NS      | $965805.00    | 0.34%             |  |  |  | No            |                  1 | On Loan: No      |
| Northwestern Mutual Series Fund, Inc. - Multi-Sector Bond Portfolio       | PIMCO MULTI SECTOR BD PORT MUTUAL FUND                                                                  | CUSIP: 668140882<br>LEI: P0C14V6IL3O47L1ZG636 | Long             | EC               | RF                | US        |  13309170 | NS      | $13721754.73  | 4.86%             |  |  |  | No            |                  1 | On Loan: No      |
| Northwestern Mutual Series Fund, Inc. - International Equity Portfolio    | International Equity Portfolio                                                                          | CUSIP: 668140692<br>LEI: 5493009J2EF7GK480170 | Long             | EC               | RF                | US        |   8828574 | NS      | $17259862.72  | 6.11%             |  |  |  | No            |                  1 | On Loan: No      |
| SPDR Portfolio Long Term Treasury ETF                                     | SPDR Portfolio Long Term Treasury ETF                                                                   | CUSIP: 78464A664<br>LEI: 549300GYQKAMF6JUVI06 | Long             | EC               | RF                | US        |    211600 | NS      | $5624328.00   | 1.99%             |  |  |  | No            |                  1 | On Loan: No      |
| Dimensional International Value ETF                                       | Dimensional International Value ETF                                                                     | CUSIP: 25434V807<br>LEI: 549300F3EUNKP4DGBS58 | Long             | EC               | RF                | US        |     66500 | NS      | $2848195.00   | 1.01%             |  |  |  | No            |                  1 | On Loan: No      |
| United States Treasury                                                    | U.S. Treasury Bills                                                                                     | CUSIP: 912797QW0<br>LEI: 254900HROIFWPRGM1V77 | Long             | STIV             | UST               | US        |   2000000 | PA      | $1978699.04   | 0.70%             | 2025-09-30      | None          | 0.00%                 | No            |                  2 | On Loan: No      |
| United States Treasury                                                    | U.S. Treasury Bills                                                                                     | CUSIP: 912797QC4<br>LEI: 254900HROIFWPRGM1V77 | Long             | STIV             | UST               | US        |   2000000 | PA      | $1993544.44   | 0.71%             | 2025-07-29      | None          | 0.00%                 | No            |                  2 | On Loan: No      |
| Invesco S&P 500 Equal Weight ETF                                          | Invesco S&P 500 Equal Weight ETF                                                                        | CUSIP: 46137V357<br>LEI: 549300F8VBQFIX481R47 | Long             | EC               | RF                | US        |     26700 | NS      | $4852458.00   | 1.72%             |  |  |  | No            |                  1 | On Loan: No      |
| iShares Core S&P Small-Cap ETF                                            | iShares Core S&P Small-Cap ETF                                                                          | CUSIP: 464287804<br>LEI: 549300BZQ17QYN750B25 | Long             | EC               | RF                | US        |      2800 | NS      | $306012.00    | 0.11%             |  |  |  | No            |                  1 | On Loan: No      |
| SPDR Portfolio S&P 400 Mid Cap ETF                                        | SPDR Portfolio S&P 400 Mid Cap ETF                                                                      | CUSIP: 78464A847<br>LEI: 549300TKUU0ZLRVSLJ96 | Long             | EC               | RF                | US        |    170400 | NS      | $9266352.00   | 3.28%             |  |  |  | No            |                  1 | On Loan: No      |
| Northwestern Mutual Series Fund, Inc. - Short-Term Bond Portfolio.        | Short Term Bond Portolio                                                                                | CUSIP: 668140601<br>LEI: BEEDB5U9NNUVQYFFEL15 | Long             | EC               | RF                | US        |   2609274 | NS      | $2789313.85   | 0.99%             |  |  |  | No            |                  1 | On Loan: No      |
| United States Treasury                                                    | U.S. Treasury Bills                                                                                     | CUSIP: 912797PQ4<br>LEI: 254900HROIFWPRGM1V77 | Long             | STIV             | UST               | US        |   2000000 | PA      | $1986063.88   | 0.70%             | 2025-08-28      | None          | 0.00%                 | No            |                  2 | On Loan: No      |
| Northwestern Mutual Series Fund, Inc. - Mid Cap Value Portfolio           | MID CAP VALUE PORTFOLIO                                                                                 | CUSIP: 668140783<br>LEI: 8TRVIGMWHSWZVXP7PI34 | Long             | EC               | RF                | US        |   4103541 | NS      | $6446662.24   | 2.28%             |  |  |  | No            |                  1 | On Loan: No      |
| Northwestern Mutual Series Fund, Inc. - Emerging Markets Equity Portfolio | MFS EMERGING MKTS PORT                                                                                  | CUSIP: 668140502<br>LEI: 549300B2SFS01R9MCJ10 | Long             | EC               | RF                | US        |  10386025 | NS      | $11164976.51  | 3.95%             |  |  |  | No            |                  1 | On Loan: No      |
| Morgan Stanley & Co. LLC                                                  | Long: 516496    TRS USD R E RECEIVE EQUITY / Short: 516496    TRS USD P F   .18000 PAY FIXED +0 PERCENT | CUSIP: 000000000<br>LEI: 9R7GPTSO7KV3UQJZQ078 | N/A              | DCO              |  | US        |   5982174 | OU      | $115964.16    | 0.04%             |  |  |  | No            |                  2 | On Loan: No      |
| SPDR Dow Jones REIT ETF                                                   | SPDR Dow Jones REIT ETF                                                                                 | CUSIP: 78464A607<br>LEI: 54930077YVRJPO64VF50 | Long             | EC               | RF                | US        |     40700 | NS      | $3925108.00   | 1.39%             |  |  |  | No            |                  1 | On Loan: No      |
| iShares Core MSCI EAFE ETF                                                | iShares Core MSCI EAFE ETF                                                                              | CUSIP: 46432F842<br>LEI: 5493009FT582MI7Y3I36 | Long             | EC               | RF                | US        |    109500 | NS      | $9141060.00   | 3.24%             |  |  |  | No            |                  1 | On Loan: No      |
| iShares Core S&P Mid-Cap ETF                                              | iShares Core S&P Mid-Cap ETF                                                                            | CUSIP: 464287507<br>LEI: 549300ODQWH5PC0IUZ78 | Long             | EC               | RF                | US        |      7350 | NS      | $455847.00    | 0.16%             |  |  |  | No            |                  1 | On Loan: No      |
| iShares Core S&P 500 ETF                                                  | iShares Core S&P 500 ETF                                                                                | CUSIP: 464287200<br>LEI: 5493007M4YMN8XL48C14 | Long             | EC               | RF                | US        |     57550 | NS      | $35732795.00  | 12.66%            |  |  |  | No            |                  1 | On Loan: No      |
| Northwestern Mutual Series Fund, Inc. - Small Cap Value Portfolio         | SMALL CAP VALUE PORTFOLIO                                                                               | CUSIP: 668140817<br>LEI: 5493006BEZYY47A02J59 | Long             | EC               | RF                | US        |   1715627 | NS      | $3383215.78   | 1.20%             |  |  |  | No            |                  1 | On Loan: No      |
| Northwestern Mutual Series Fund, Inc. - Small Cap Growth Stock Portfolio  | SMALL CAP GROWTH STK PORTFOLIO                                                                          | CUSIP: 668140825<br>LEI: YTR2S467AP5XPLF6CQ13 | Long             | EC               | RF                | US        |   1380149 | NS      | $3327540.20   | 1.18%             |  |  |  | No            |                  1 | On Loan: No      |
| SPDR Portfolio S&P 600 Small Cap ETF                                      | SPDR Portfolio S&P 600 Small Cap ETF                                                                    | CUSIP: 78468R853<br>LEI: 549300NYZX301TBLUJ08 | Long             | EC               | RF                | US        |    142000 | NS      | $6049200.00   | 2.14%             |  |  |  | No            |                  1 | On Loan: No      |
| Northwestern Mutual Series Fund, Inc. - Large Cap Blend Portfolio         | LARGE CAP BLEND PORT                                                                                    | CUSIP: 668140205<br>LEI: 549300J8IDGQV6XROU84 | Long             | EC               | RF                | US        |   9914157 | NS      | $11629306.26  | 4.12%             |  |  |  | No            |                  1 | On Loan: No      |
| Northwestern Mutual Series Fund, Inc. - Mid Cap Growth Stock Portfolio    | MID CAP GROWTH PORTFOLIO                                                                                | CUSIP: 668140866<br>LEI: LIP0ME8UWTR611J45283 | Long             | EC               | RF                | US        |   2025301 | NS      | $7260702.49   | 2.57%             |  |  |  | No            |                  1 | On Loan: No      |

### Signature

**Date Signed:** 2025-07-15

**Name of Applicant:** NORTHWESTERN MUTUAL SERIES FUND INC

**Signature:** Linda Wisniewski

**Name of Signer:** Linda Wisniewski

**Title:** Controller and Chief Accounting Officer