# EDGAR Filing Document

**Accession Number:** 0000742212
**File Stem:** 0001410368-26-053244
**Filing Date:** 2026-5
**Character Count:** 80311
**Document Hash:** dc515833df357ac7eb4f9de30198b657
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001410368-26-053244.hdr.sgml**: 20260527

**ACCESSION NUMBER**: 0001410368-26-053244

**CONFORMED SUBMISSION TYPE**: NPORT-P

**PUBLIC DOCUMENT COUNT**: 2

**CONFORMED PERIOD OF REPORT**: 20260331

**FILED AS OF DATE**: 20260527

**DATE AS OF CHANGE**: 20260527

**PERIOD START**: 20261231

**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:** 261024808

**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

### Long-Term US Government Bond Portfolio (Series ID: S000018234)

| Class ID   | Class Name                             | Ticker Symbol   |
|:---|:---|:---|
| C000050282 | Long-Term US Government Bond Portfolio |  |

## Nport-Ex

Long-Term U.S. Government Bond Portfolio

SCHEDULE OF INVESTMENTS

**March 31, 2026 (unaudited)** 

---

| | | |
|:---|:---|:---|
| Corporate Bonds (1.2%) | Shares/ Par <sup>+</sup> | Value<br> $(000's)  |
|  **Communications (1.0%)** |  |  |
|  Beignet Investor LLC<br>6.581%, 5/30/49 144A | 1180000 | 1213 |
| &nbsp;&nbsp;&nbsp;&nbsp; **Total** |  | **1213** |
|  **Industrial (0.2%)** |  |  |
|  Vessel Management Services, Inc.<br>3.432%, 8/15/36 | 291000 | 265 |
| &nbsp;&nbsp;&nbsp;&nbsp; **Total** |  | **265** |
| &nbsp;&nbsp;&nbsp;&nbsp; **Total Corporate Bonds (Cost: $1,471)** |  | **1478** |
| Governments (130.7%) |  |  |
|  **Governments (130.7%)** |  |  |
|  Resolution Funding Corp. Strip Coupon<br>0.000%, 4/15/28 IO | 400000 | 369 |
|  Tennessee Valley Authority Strip Principal<br>0.000%, 5/1/30 PO | 500000 | 423 |
|  US Treasury Bond |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp; 1.125%, 5/15/40 | 1650000 | 1039 |
| &nbsp;&nbsp;&nbsp;&nbsp; 1.125%, 8/15/40 | 40890000 | 25491 |
| &nbsp;&nbsp;&nbsp;&nbsp; 1.375%, 8/15/50 | 1080000 | 528 |
| &nbsp;&nbsp;&nbsp;&nbsp; 1.375%, 11/15/40 | 9800000 | 6313 |
| &nbsp;&nbsp;&nbsp;&nbsp; 1.625%, 11/15/50 | 400000 | 209 |
| &nbsp;&nbsp;&nbsp;&nbsp; 1.875%, 2/15/41 | 1900000 | 1316 |
| &nbsp;&nbsp;&nbsp;&nbsp; 2.000%, 2/15/50 | 12920000 | 7522 |
| &nbsp;&nbsp;&nbsp;&nbsp; 2.250%, 8/15/49 | 300000 | 187 |
| &nbsp;&nbsp;&nbsp;&nbsp; 2.375%, 5/15/51 | 2300000 | 1439 |
| &nbsp;&nbsp;&nbsp;&nbsp; 2.500%, 2/15/45 | 1440000 | 1010 |
| &nbsp;&nbsp;&nbsp;&nbsp; 2.500%, 2/15/46 | 850000 | 586 |
| &nbsp;&nbsp;&nbsp;&nbsp; 2.750%, 11/15/47 | 1800000 | 1270 |
| &nbsp;&nbsp;&nbsp;&nbsp; 2.875%, 5/15/49 | 1750000 | 1244 |
| &nbsp;&nbsp;&nbsp;&nbsp; 3.000%, 8/15/52 | 4500000 | 3199 |
| &nbsp;&nbsp;&nbsp;&nbsp; 3.000%, 11/15/44 | 1620000 | 1240 |
| &nbsp;&nbsp;&nbsp;&nbsp; 3.000%, 5/15/45 | 1410000 | 1073 |
| &nbsp;&nbsp;&nbsp;&nbsp; 3.000%, 11/15/45 | 370000 | 280 |
| &nbsp;&nbsp;&nbsp;&nbsp; 3.000%, 2/15/47 | 900000 | 671 |
| &nbsp;&nbsp;&nbsp;&nbsp; 3.000%, 5/15/47 | 500000 | 372 |
| &nbsp;&nbsp;&nbsp;&nbsp; 3.000%, 2/15/48 | 330000 | 243 |
| &nbsp;&nbsp;&nbsp;&nbsp; 3.000%, 8/15/48 b | 4000000 | 2936 |
| &nbsp;&nbsp;&nbsp;&nbsp; 3.000%, 2/15/49 | 10470000 | 7647 |
| &nbsp;&nbsp;&nbsp;&nbsp; 3.125%, 2/15/43 | 600000 | 480 |
| &nbsp;&nbsp;&nbsp;&nbsp; 3.125%, 8/15/44 | 2920000 | 2289 |
| &nbsp;&nbsp;&nbsp;&nbsp; 3.125%, 5/15/48 | 2430000 | 1829 |
| &nbsp;&nbsp;&nbsp;&nbsp; 3.375%, 8/15/42 | 9500000 | 7935 |
| &nbsp;&nbsp;&nbsp;&nbsp; 3.375%, 11/15/48 | 4200000 | 3291 |
| &nbsp;&nbsp;&nbsp;&nbsp; 3.625%, 2/15/53 | 2900000 | 2327 |
| &nbsp;&nbsp;&nbsp;&nbsp; 3.625%, 5/15/53 | 1400000 | 1123 |
| &nbsp;&nbsp;&nbsp;&nbsp; 3.875%, 2/15/43 | 300000 | 267 |
| &nbsp;&nbsp;&nbsp;&nbsp; 3.875%, 5/15/43 | 3100000 | 2747 |
| &nbsp;&nbsp;&nbsp;&nbsp; 4.000%, 11/15/52 | 15830000 | 13601 |
| &nbsp;&nbsp;&nbsp;&nbsp; 4.000%, 11/15/42 | 2800000 | 2534 |
| &nbsp;&nbsp;&nbsp;&nbsp; 4.125%, 8/15/44 | 1600000 | 1452 |
| &nbsp;&nbsp;&nbsp;&nbsp; 4.375%, 5/15/41 | 16080000 | 15486 |
| &nbsp;&nbsp;&nbsp;&nbsp; 4.375%, 8/15/43 | 1600000 | 1510 |
| &nbsp;&nbsp;&nbsp;&nbsp; 4.500%, 2/15/44 | 400000 | 383 |
| &nbsp;&nbsp;&nbsp;&nbsp; 4.625%, 2/15/55 | 10900000 | 10396 |

---

---

| | | |
|:---|:---|:---|
| Governments (130.7%) | Shares/ Par <sup>+</sup> | Value<br> $(000's)  |
|  **Governments continued** |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp; 4.625%, 5/15/44 | 500000 | 485 |
| &nbsp;&nbsp;&nbsp;&nbsp; 4.625%, 11/15/44 | 700000 | 677 |
| &nbsp;&nbsp;&nbsp;&nbsp; 4.625%, 11/15/45 | 2700000 | 2604 |
| &nbsp;&nbsp;&nbsp;&nbsp; 4.625%, 2/15/46 | 400000 | 386 |
| &nbsp;&nbsp;&nbsp;&nbsp; 4.750%, 5/15/55 | 900000 | 876 |
| &nbsp;&nbsp;&nbsp;&nbsp; 4.750%, 11/15/43 | 1790000 | 1768 |
| &nbsp;&nbsp;&nbsp;&nbsp; 4.750%, 2/15/45 | 300000 | 295 |
| &nbsp;&nbsp;&nbsp;&nbsp; 4.875%, 8/15/45 | 2660000 | 2651 |
| &nbsp;&nbsp;&nbsp;&nbsp; 5.000%, 5/15/45 | 500000 | 507 |
|  US Treasury Inflation Index Bond |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp; 0.125%, 1/15/32 | 469280 | 432 |
| &nbsp;&nbsp;&nbsp;&nbsp; 0.625%, 7/15/32 | 1792512 | 1691 |
| &nbsp;&nbsp;&nbsp;&nbsp; 1.125%, 1/15/33 | 2338506 | 2252 |
| &nbsp;&nbsp;&nbsp;&nbsp; 1.750%, 1/15/34 | 2753244 | 2741 |
| &nbsp;&nbsp;&nbsp;&nbsp; 1.875%, 7/15/34 | 207286 | 208 |
| &nbsp;&nbsp;&nbsp;&nbsp; 2.125%, 1/15/35 | 309150 | 314 |
|  US Treasury Note |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp; 1.500%, 11/30/28 | 700000 | 659 |
| &nbsp;&nbsp;&nbsp;&nbsp; 2.375%, 3/31/29 b | 900000 | 863 |
| &nbsp;&nbsp;&nbsp;&nbsp; 3.250%, 6/30/29 | 400000 | 393 |
| &nbsp;&nbsp;&nbsp;&nbsp; 3.625%, 3/31/30 | 200000 | 198 |
| &nbsp;&nbsp;&nbsp;&nbsp; 3.875%, 7/15/28 | 2500000 | 2503 |
| &nbsp;&nbsp;&nbsp;&nbsp; 4.125%, 11/15/27 | 100000 | 100 |
|  US Treasury Strip Coupon |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp; 0.000%, 8/15/34 IO | 850000 | 594 |
| &nbsp;&nbsp;&nbsp;&nbsp; 0.000%, 5/15/41 IO | 40000 | 19 |
| &nbsp;&nbsp;&nbsp;&nbsp; 0.000%, 8/15/41 IO | 50000 | 23 |
| &nbsp;&nbsp;&nbsp;&nbsp; 0.000%, 11/15/41 IO | 80000 | 37 |
| &nbsp;&nbsp;&nbsp;&nbsp; 0.000%, 5/15/42 IO | 70000 | 31 |
| &nbsp;&nbsp;&nbsp;&nbsp; 0.000%, 8/15/42 IO | 220000 | 97 |
| &nbsp;&nbsp;&nbsp;&nbsp; 0.000%, 11/15/42 IO | 50000 | 22 |
| &nbsp;&nbsp;&nbsp;&nbsp; **Total** |  | **157683** |
| &nbsp;&nbsp;&nbsp;&nbsp; **Total Governments (Cost: $178,143)** |  | **157683** |
| Structured Products (21.6%) |  |  |
|  **Asset Backed Securities (0.3%)** |  |  |
|  ECMC Group Student Loan Trust, Series 2018-1A, Class A<br>4.526%, (US 30 Day Average SOFR plus<br> 0.865%), 2/27/68 144A | 35183 | 35 |
|  Hertz Vehicle Financing LLC, Series 2022-2A, Class A<br>2.330%, 6/26/28 144A | 300000 | 293 |
|  Massachusetts Educational Financing Authority, Series 2008-1, Class A1<br>5.099%, (US 90 Day Average SOFR plus<br> 1.212%), 4/25/38 | 7734 | 8 |
| &nbsp;&nbsp;&nbsp;&nbsp; **Total** |  | **336** |
|  **Mortgage Securities (21.3%)** |  |  |
|  Benchmark Mortgage Trust, Series 2019-B9, Class A5<br>4.015%, 3/15/52 | 600000 | 587 |
|  Benchmark Mortgage Trust, Series 2024-V6, Class A3<br>5.925%, 3/15/57 | 200000 | 206 |

---

**1** 

------

Long-Term U.S. Government Bond Portfolio

---

| | | |
|:---|:---|:---|
| Structured Products (21.6%) | Shares/ Par <sup>+</sup> | Value<br> $(000's)  |
|  **Mortgage Securities continued** |  |  |
|  COMM Mortgage Trust, Series 2018-HOME, Class A<br>3.815%, (CSTR, AFC), 4/10/33 144A | 200000 | 196 |
|  Federal Home Loan Mortgage Corp.<br>4.500%, 5/1/54 | 1598635 | 1544 |
|  Federal Home Loan Mortgage Corp., Series 2752, Class EZ<br>5.500%, 2/15/34 | 65385 | 67 |
|  Federal Home Loan Mortgage Corp., Series 3759, Class FB<br>4.287%, (US 30 Day Average SOFR plus<br> 0.615%), 11/15/40 | 12129 | 12 |
|  Federal Home Loan Mortgage Corp., Series 4092, Class AY<br>3.000%, 8/15/32 | 2200000 | 2140 |
|  Federal Home Loan Mortgage Corp., Series 4387, Class AZ<br>4.000%, 9/15/44 | 1770779 | 1692 |
|  Federal Home Loan Mortgage Corp., Series 4398, Class ZX<br>4.000%, 9/15/54 | 946562 | 872 |
|  Federal Home Loan Mortgage Corp., Series 4830, Class ZG<br>3.000%, 4/15/53 | 621775 | 481 |
|  Federal Home Loan Mortgage Corp., Series T-61, Class 1A1<br>5.259%, (Federal Reserve US 12 Month Cumulative Avg 1 year CMT plus 1.400%),<br> 7/25/44 | 2871 | 3 |
|  Federal National Mortgage Association |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp; 3.600%, 2/1/40 | 487767 | 459 |
| &nbsp;&nbsp;&nbsp;&nbsp; 5.000%, 6/1/35 | 12923 | 13 |
| &nbsp;&nbsp;&nbsp;&nbsp; 5.000%, 2/1/36 | 21128 | 21 |
| &nbsp;&nbsp;&nbsp;&nbsp; 5.500%, 5/1/49 | 18260 | 19 |
| &nbsp;&nbsp;&nbsp;&nbsp; 6.500%, 5/1/54 | 609877 | 631 |
|  Federal National Mortgage Association, Series 2007-39, Class NZ<br>4.250%, 5/25/37 | 14415 | 14 |
|  Federal National Mortgage Association, Series 2012-101, Class FC<br>4.276%, (US 30 Day Average SOFR plus<br> 0.615%), 9/25/42 | 19622 | 19 |
|  Federal National Mortgage Association, Series 2016-61, Class ML<br>3.000%, 9/25/46 | 900000 | 761 |
|  Freddie Mac Military Housing Bonds Resecuritization Trust, Series 2015-R1, Class A2<br>4.303%, (CSTR), 10/25/52 144A | 536568 | 458 |
|  Government National Mortgage Association TBA<br>4.000%, 4/21/56 | 800000 | 749 |
|  Government National Mortgage Association, Series 2010-26, Class OW<br>0.000%, 2/20/40 PO | 195566 | 157 |

---

---

| | | |
|:---|:---|:---|
| Structured Products (21.6%) | Shares/ Par <sup>+</sup> | Value<br> $(000's)  |
|  **Mortgage Securities continued** |  |  |
|  Government National Mortgage Association, Series 2010-75, Class OA<br>0.000%, 9/20/35 PO | 118965 | 99 |
|  Hilton USA Trust, Series 2016-HHV, Class A<br>3.719%, 11/5/38 144A | 600000 | 597 |
|  Merrill Lynch Mortgage Investors Trust, Series 2003-A4, Class 3A<br>7.000%, (CSTR, AFC), 5/25/33 | 371 | –π |
|  New Residential Mortgage Loan Trust, Series 2020-RPL1, Class A1<br>2.750%, (AFC), 11/25/59 144A | 55386 | 53 |
|  Structured Asset Mortgage Investments II Trust, Series 2004-AR5, Class 1A1<br>4.451%, (US SOFR 1 Month plus<br> 0.775%), (AFC), 10/19/34 | 830 | 1 |
|  Towd Point Mortgage Trust, Series 2020-1, Class A2A<br>3.100%, (AFC), 1/25/60 144A | 200000 | 184 |
|  Uniform Mortgage Backed Security TBA |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp; 3.500%, 6/11/56 | 300000 | 274 |
| &nbsp;&nbsp;&nbsp;&nbsp; 4.000%, 4/13/56 | 700000 | 660 |
| &nbsp;&nbsp;&nbsp;&nbsp; 4.000%, 5/13/56 | 2900000 | 2734 |
| &nbsp;&nbsp;&nbsp;&nbsp; 5.000%, 4/13/56 | 2000000 | 1972 |
| &nbsp;&nbsp;&nbsp;&nbsp; 5.000%, 5/13/56 | 1200000 | 1182 |
| &nbsp;&nbsp;&nbsp;&nbsp; 6.000%, 5/13/56 | 6800000 | 6923 |
| &nbsp;&nbsp;&nbsp;&nbsp; **Total** |  | **25780** |
| &nbsp;&nbsp;&nbsp;&nbsp; **Total Structured Products (Cost: $26,942)** | &nbsp;&nbsp;&nbsp;&nbsp; **Total Structured Products (Cost: $26,942)** | **26116** |
| Short-Term Investments (11.7%) |  |  |
|  **Governments (1.1%)** |  |  |
|  Federal Home Loan Bank |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp; 3.605%, 7/15/26 | 700000 | 692 |
| &nbsp;&nbsp;&nbsp;&nbsp; 3.635%, 4/15/26 | 700000 | 699 |
| &nbsp;&nbsp;&nbsp;&nbsp; **Total** |  | **1391** |
|  **Repurchase Agreements (10.6%)** |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp; Citigroup Global Markets, Inc., 3.670%, 4/2/26 (Purchased on 3/31/26, to be repurchased at $11,801,203, collateralized by a US Treasury Note, 3.625%, due 3/31/28, par and fair value of $12,087,100 and $12,045,315, respectively) | 11800000 | 11800 |
| &nbsp;&nbsp;&nbsp;&nbsp; JP Morgan Securities LLC, 3.660%, 4/2/26 (Purchased on 3/26/26, to be repurchased at $932,538, collateralized by a US Treasury Bond, 1.125%, due 8/15/40, par and fair value of $1,500,000 and $934,688, respectively) | 931875 | 932 |
| &nbsp;&nbsp;&nbsp;&nbsp; **Total** |  | **12732** |
| &nbsp;&nbsp;&nbsp;&nbsp; **Total Short-Term Investments (Cost: $14,124)** | &nbsp;&nbsp;&nbsp;&nbsp; **Total Short-Term Investments (Cost: $14,124)** | **14123** |
| &nbsp;&nbsp;&nbsp;&nbsp; **Total Investments (165.2%) (Cost: $220,680)<sup>@</sup>** | &nbsp;&nbsp;&nbsp;&nbsp; **Total Investments (165.2%) (Cost: $220,680)<sup>@</sup>** | **199400** |
| &nbsp;&nbsp;&nbsp;&nbsp; **Other Assets, Less Liabilities (-65.2%)** |  | **(78729)** |
| &nbsp;&nbsp;&nbsp;&nbsp; **Net Assets (100.0%)** |  | **120671** |

---

**2** 

------

Long-Term U.S. Government Bond Portfolio

**Exchange Traded or Centrally Cleared Derivatives** 

**Futures** 

---

| | | | | | | | | | |
|:---|:---|:---|:---|:---|:---|:---|:---|:---|:---|
| Issuer | Long/<br>Short | Currency | Notional Par<br>(000's) | Number<br>of<br>Contracts | Expiration<br>Date | Notional Value<br>(000's) | Unrealized<br>Appreciation/<br>(Depreciation)<br>(000's) | Variation Margin<br>(000's) |  |
|  Five-Year US Treasury Note Future | Short | USD | 12300 | 123 | 6/26 | $13306 | $133 | $(17) |  |
|  Ten-Year US Treasury Note Future | Long | USD | 3800 | 38 | 6/26 | 4220 | (48) | 9 |  |
|  Three-Month SOFR Future | Long | USD | 8500 | 34 | 6/27 | 8193 | (46) | 2 |  |
|  Three-Month SOFR Future | Long | USD | 8500 | 34 | 9/27 | 8198 | (40) | 2 |  |
|  Three-Month SOFR Future | Long | USD | 8500 | 34 | 12/27 | 8205 | (28) | 2 |  |
|  Two-Year US Treasury Note Future | Short | USD | 1000 | 5 | 6/26 | 1037 | 7 |  | π |
|  Ultra Long-Term US Treasury Bond Future | Short | USD | 400 | 4 | 6/26 | 466 | 16 | (1) |  |
|  Ultra Ten-Year US Treasury Note Future | Short | USD | 25600 | 256 | 6/26 | 29060 | 664 | (76) |  |
|  US Treasury Long Bond Future | Short | USD | 7400 | 74 | 6/26 | 8427 | 230 | (28) |  |
|  |  |  |  |  |  |  | $888 | $(107) |  |

---

**Centrally Cleared Interest Rate Swaps - Receive Floating Rate** 

---

| | | | | | | | | |
|:---|:---|:---|:---|:---|:---|:---|:---|:---|
| Floating Rate Index | Fixed<br>Rate | Expiration<br>Date | Notional<br>Amount<br>(000's) | Currency | Upfront<br>Premium Paid/<br>(Received)<br>(000's) | Unrealized<br>Appreciation/<br>(Depreciation)<br> (000's) | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Market Value <br>(000's) | Variation<br> Margin(000's) |
|  1-Day USD-SOFR Compounded-OIS | 1.250% | 6/41 | 3110 | USD | $84 | $1018 | $1102 | $4 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1-Day USD-SOFR Compounded-OIS | 1.750% | 10/53 | 500 | USD | (7) | 205 | 198 | 2 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1-Day USD-SOFR Compounded-OIS | 3.500% | 12/54 | 2800 | USD | 65 | 245 | 310 | 15 |
|  |  |  |  |  | $142 | $1468 | $1610 | $21 |

---

---

| | | | | | | | |
|:---|:---|:---|:---|:---|:---|:---|:---|
|  | Financial Derivative Assets | Financial Derivative Assets | Financial Derivative Assets | Financial Derivative Liabilities | Financial Derivative Liabilities | Financial Derivative Liabilities | Financial Derivative Liabilities |
|  | Variation Margin (000's) | Variation Margin (000's) | Variation Margin (000's) | Variation Margin (000's) | Variation Margin (000's) | Variation Margin (000's) | Market Value<br>(000's) |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Swaps | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Futures | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Total | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Swaps | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Futures | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Total | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Options |
| Total Exchange-Traded or Centrally Cleared Derivatives | $21 | $15 | $36 | $– | $(122) | $(122) | $– |

---

+ All par is stated in U.S. Dollar unless otherwise noted.

---

| | |
|:---|:---|
| 144A | Security exempt from registration under Rule 144A of the Securities Act of 1933. These securities may be resold as transactions exempt from registration, normally to qualified institutional buyers. At March 31, 2026 the value of these securities (in thousands) was $3,029 representing 2.5% of the net assets.  |

---

b Part or all of the security has been pledged as collateral.

---

| | |
|:---|:---|
| π | Amount is less than one thousand.  |

---

---

| | |
|:---|:---|
| @ | At March 31, 2026, the aggregate cost of investments, including derivatives, for federal tax purposes (in thousands) was $201,371 and the net unrealized appreciation of investments based on that cost was $527 which is comprised of $2,679 aggregate gross unrealized appreciation and $2,152 aggregate gross unrealized depreciation. Because tax adjustments are calculated annually, these amounts do not reflect tax adjustments. For the previous fiscal year's federal income tax information, please refer to the Notes to the Financial Statements section in the Portfolio's most recent annual report.  |

---

**3** 

------

Long-Term U.S. Government Bond Portfolio

The Fair Value Measurements and Disclosures Topic of the FASB Accounting Standards Codification defines fair value as the price that a Fund would receive to sell an asset or pay to transfer a liability in an orderly transaction between market participants at the measurement date. It establishes and requires disclosure of a fair value hierarchy, separately for each major category of asset and liability, which segregates fair value measurements into levels. A summary of the fair value hierarchy is described below:

Level 1 - fair value is determined by unadjusted quoted prices in active markets for identical securities or derivatives

Level 2 - fair value is determined by other significant observable inputs

Level 3 - fair value is determined by significant unobservable inputs

The categorization of a value determined for a financial instrument within the hierarchy is based upon the pricing transparency of the instrument and does not necessarily correspond to the Portfolio's perceived risk of that instrument.

The following is a summary of the inputs used in valuing the Portfolio's Investments at March 31, 2026.

---

| | | | |
|:---|:---|:---|:---|
| | Valuation Inputs | Valuation Inputs | Valuation Inputs |
| <br>**Description** | **Level 1 - Quoted<br>Prices** | **Level 2 - Other<br>Significant<br>Observable Inputs** | **Level 3**<br> **- Significant<br>Unobservable<br>Inputs** |
|  | *(Amounts in thousands)* | *(Amounts in thousands)* |  |
|  Assets: |  |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Corporate Bonds | $— | $1478 | $— |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Governments |  | 157683 |  |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Structured Products |  | 26116 |  |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Short-Term Investments |  | 14123 |  |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Other Financial Instruments^ |  |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Futures | 1050 |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Interest Rate Swaps |  | 1610 |  |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Total Assets: | $1050 | $201010 | $— |
|  Liabilities: |  |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Other Financial Instruments^ |  |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Futures | (162) |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Total Liabilities: | $(162) | $— | $— |

---

^ Other financial instruments are derivative instruments such as futures and forward foreign currency contracts, which are valued at the unrealized appreciation (depreciation) on the instrument, and securities sold short, reverse repurchase agreements, written options and swaps contracts, which are valued at market value.

**4** 

------

Abbreviations (unaudited)

**Abbreviations that may be used in the preceding statements** 

---

| | |
|:---|:---|
| ADR | American Depositary Receipt |
| AFC | Available Funds Cap security - Security accrues interest at an assumed or uncapped rate. If the interest rate on the underlying loans is lower than the uncapped rate, then the security will pay at the lower rate. |
| CSTR | Collateral Strip Rate security - interest is based on the weighted net interest rate of the collateral. |
| IO | Interest Only Security |
| PO | Principal Only Security |
| GDR | Global Depositary Receipt |
| RB | Revenue Bond |
| CPURNSA | U.S. Consumer Price Index - All Urban Consumers - Not Seasonally Adjusted |
| IBOR | Interbank Offered Rate |
| LIBOR | London Interbank Offered Rate |
| SOFR | Secured Overnight Financing Rate |
| CME | Chicago Mercantile Exchange |
| ICE | Intercontinental Exchange |
| FTSE | Financial Times Stock Exchange |
| SONIO | Sterling Overnight Interbank Average Rate |
| DAC | Designated Activity Company |
| TBA | To Be Announced |
| CMT | Constant Maturity Treasury |
| OIS | Overnight Index Swaps |
| BBR | Bank Bill Rate |
| BBSW | Bank Bill Swap Reference Rate |
| DIFC | Dubai International Financial Centre |
| BRL-CDI | Brazil Interbank Deposit Rate |
| CAONREPO | Canadian Overnight Repo Rate Average |
| JIBAR | Johannesburg Interbank Agreed Rate |
| EURIBOR | Euro Interbank Offered Rate |
| PRIBOR | Prague Interbank Offered Rate |
| ETF | Exchange Traded Fund |
| **Currency Abbreviations** | **Currency Abbreviations** |
| AED | United Arab Emirates Dirham |
| AUD | Australian Dollar |
| BRL | Brazilian Real |
| CAD | Canadian Dollar |
| CHF | Swiss Franc |
| CNH | Chinese Yuan Renminbi - Offshore |
| CNY | Chinese Yuan Renminbi |
| COP | Colombian Peso |
| CZK | Czech Koruna |
| DKK | Danish Krone |
| EGP | Egyptian Pound |
| EUR | Euro |
| GBP | British Pound |
| HKD | Hong Kong Dollar |
| IDR | Indonesian Rupiah |
| ILS | Israeli Shekel |
| INR | Indian Rupee |
| JPY | Japanese Yen |
| KRW | South Korean Won |
| KWD | Kuwaiti Dinar |
| KZT | Kazakhstani Tenge |
| MXN | Mexican New Peso |
| NOK | Norwegian Krone |
| NZD | New Zealand Dollar |
| PEN | Peruvian Sol |
| PLN | Polish Zloty |
| PYG | Paraguayan Guarani |
| RUB | Russian Ruble |
| SAR | Saudi Riyal |
| SEK | Swedish Krona |
| SGD | Singapore Dollar |
| THB | Thai Baht |
| TRY | Turkish Lira |
| TWD | Taiwan Dollar |
| USD | United States Dollar |
| ZAR | South African Rand |

---

**1**

## 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:** Long-Term US Government Bond Portfolio

- **b. EDGAR series identifier (if any):** S000018234

- **c. LEI of Series:** G1NIKRLT4013DJUHQR28

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

- **a. Date of fiscal year-end:** 2026-12-31

- **b. Date as of which information is reported:** 2026-03-31

**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:** $346177788.96

**Total Liabilities:** $225648403.47

**Net Assets:** $120529385.49

**Delayed Delivery Securities:** $219005838.09

**Currency Risk Metrics (dv01):**

- 

**Credit Spread Risk - Investment Grade (dv01):**

- **3-Month:** -22.70000000 | **1-Year:** -234.57000000 | **5-Year:** -248.45000000 | **10-Year:** -705.34000000 | **30-Year:** -597.64000000

**Credit Spread Risk - Non-Investment Grade (dv01):**

- **3-Month:** -22.75000000 | **1-Year:** -138.19000000 | **5-Year:** -220.74000000 | **10-Year:** -554.69000000 | **30-Year:** -111.07000000

**Monthly Return Information**

| Class               | Month 1 Return (%)   | Month 2 Return (%)   | Month 3 Return (%)   |
|:---|:---|:---|:---|
| Class ID C000050282 | 0.00%                | 4.07%                | -4.22%               |

**Monthly Gains & Losses**

| Period   | Net Realized Gain/Loss   | Net Unrealized Appreciation/Depreciation   |
|:---|:---|:---|
| Month 1  | $120164.61               | $-731482.95                                |
| Month 2  | $1882974.66              | $3929279.63                                |
| Month 3  | $-5625609.24             | $-1604420.22                               |

**Designated Index Information**

- **Index Name:** Bloomberg Long-Term U.S. Treasury Index

- **Index Identifier:** LUTLTRUU

### 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   |
|:---|:---|:---|:---|:---|:---|:---|---:|:---|:---|:---|:---|:---|:---|:---|---:|:---|
| UMBS, TBA                                      | Uniform Mortgage-Backed Security, TBA                                                                         | CUSIP: 01F032666<br>LEI: N/A                  | Long             | ABS-MBS          | USGSE             | US        |    300000 | PA      | $274336.96    | 0.23%             | 2056-06-11      | Fixed         | 3.50%                 | No            |                  2 | On Loan: No      |
| UMBS, TBA                                      | Uniform Mortgage-Backed Security, TBA                                                                         | CUSIP: 01F040644<br>LEI: B1V7KEBTPIMZEU4LTD58 | Long             | ABS-MBS          | USGSE             | US        |    700000 | PA      | $660466.55    | 0.55%             | 2056-04-13      | Fixed         | 4.00%                 | No            |                  2 | On Loan: No      |
| UMBS, TBA                                      | Uniform Mortgage-Backed Security, TBA                                                                         | CUSIP: 01F040651<br>LEI: B1V7KEBTPIMZEU4LTD58 | Long             | ABS-MBS          | USGSE             | US        |   2900000 | PA      | $2734066.21   | 2.27%             | 2056-05-13      | Fixed         | 4.00%                 | No            |                  2 | On Loan: No      |
| UMBS, TBA                                      | Uniform Mortgage-Backed Security, TBA                                                                         | CUSIP: 01F050643<br>LEI: N/A                  | Long             | ABS-MBS          | USGSE             | US        |   2000000 | PA      | $1972253.28   | 1.64%             | 2056-04-13      | Fixed         | 5.00%                 | No            |                  2 | On Loan: No      |
| UMBS, TBA                                      | Uniform Mortgage-Backed Security, TBA                                                                         | CUSIP: 01F050650<br>LEI: N/A                  | Long             | ABS-MBS          | USGSE             | US        |   1200000 | PA      | $1181992.60   | 0.98%             | 2056-05-13      | Fixed         | 5.00%                 | No            |                  2 | On Loan: No      |
| UMBS, TBA                                      | Uniform Mortgage-Backed Security, TBA                                                                         | CUSIP: 01F060659<br>LEI: N/A                  | Long             | ABS-MBS          | USGSE             | US        |   6800000 | PA      | $6923196.01   | 5.74%             | 2056-05-13      | Fixed         | 6.00%                 | No            |                  2 | On Loan: No      |
| BEIGNET INVESTOR LLC                           | Beignet Investor LLC                                                                                          | CUSIP: 076912AA2<br>LEI: N/A                  | Long             | DBT              | CORP              | US        |   1180000 | PA      | $1213224.26   | 1.01%             | 2049-05-30      | Fixed         | 6.58%                 | No            |                  2 | On Loan: No      |
| BENCHMARK Mortgage Trust                       | Benchmark 2019-B9 Mortgage Trust                                                                              | CUSIP: 08160JAE7<br>LEI: N/A                  | Long             | ABS-MBS          | CORP              | US        |    600000 | PA      | $586801.86    | 0.49%             | 2052-03-15      | Fixed         | 4.02%                 | No            |                  2 | On Loan: No      |
| BENCHMARK Mortgage Trust                       | Benchmark 2024-V6 Mortgage Trust                                                                              | CUSIP: 081927AB1<br>LEI: N/A                  | Long             | ABS-MBS          | CORP              | US        |    200000 | PA      | $206400.46    | 0.17%             | 2057-03-15      | Fixed         | 5.93%                 | No            |                  2 | On Loan: No      |
| COMM Mortgage Trust                            | COMM 2018-HOME Mortgage Trust                                                                                 | CUSIP: 20048JAA8<br>LEI: N/A                  | Long             | ABS-MBS          | CORP              | US        |    200000 | PA      | $195536.60    | 0.16%             | 2033-04-10      | Variable      | 3.82%                 | No            |                  2 | On Loan: No      |
| Government National Mortgage Association       | Ginnie Mae                                                                                                    | CUSIP: 21H040640<br>LEI: 549300M8ZYFG0OCMTT87 | Long             | ABS-MBS          | USGA              | US        |    800000 | PA      | $749260.96    | 0.62%             | 2056-04-20      | Fixed         | 4.00%                 | No            |                  2 | On Loan: No      |
| VESSEL MANAGEMENT SERVIC                       | Vessel Management Services Inc                                                                                | CUSIP: 228027AA6<br>LEI: 549300FGG4OD84UNFA43 | Long             | DBT              | CORP              | US        |    291000 | PA      | $264555.65    | 0.22%             | 2036-08-15      | Fixed         | 3.43%                 | No            |                  2 | On Loan: No      |
| ECMC Group Student Loan Trust                  | ECMC Group Student Loan Trust 2018-1                                                                          | CUSIP: 26828HAA5<br>LEI: N/A                  | Long             | ABS-O            | CORP              | US        |     35183 | PA      | $34969.49     | 0.03%             | 2068-02-27      | Floating      | 4.53%                 | No            |                  2 | On Loan: No      |
| Freddie Mac                                    | Freddie Mac Pool                                                                                              | CUSIP: 3132DWLJ0<br>LEI: S6XOOCT0IEG5ABCC6L87 | Long             | ABS-MBS          | USGSE             | US        |   1598635 | PA      | $1543553.13   | 1.28%             | 2054-05-01      | Fixed         | 4.50%                 | No            |                  2 | On Loan: No      |
| FED HOME LN DISCOUNT NT                        | Federal Home Loan Bank Discount Notes                                                                         | CUSIP: 313385VP8<br>LEI: 2549001DPIFGXC1TOL40 | Long             | DBT              | USGSE             | US        |    700000 | PA      | $698952.92    | 0.58%             | 2026-04-15      | None          | 0.00%                 | No            |                  2 | On Loan: No      |
| FED HOME LN DISCOUNT NT                        | Federal Home Loan Bank Discount Notes                                                                         | CUSIP: 313385ZJ8<br>LEI: 2549001DPIFGXC1TOL40 | Long             | DBT              | USGSE             | US        |    700000 | PA      | $692580.00    | 0.57%             | 2026-07-15      | None          | 0.00%                 | No            |                  2 | On Loan: No      |
| Fannie Mae                                     | Fannie Mae REMICS                                                                                             | CUSIP: 3136A76U1<br>LEI: B1V7KEBTPIMZEU4LTD58 | Long             | ABS-MBS          | USGSE             | US        |     19622 | PA      | $19407.39     | 0.02%             | 2042-09-25      | Floating      | 4.28%                 | No            |                  2 | On Loan: No      |
| Fannie Mae                                     | Fannie Mae REMICS                                                                                             | CUSIP: 3136ATQS6<br>LEI: B1V7KEBTPIMZEU4LTD58 | Long             | ABS-MBS          | USGSE             | US        |    900000 | PA      | $760885.65    | 0.63%             | 2046-09-25      | Fixed         | 3.00%                 | No            |                  2 | On Loan: No      |
| Freddie Mac                                    | Freddie Mac REMICS                                                                                            | CUSIP: 3137A2SY8<br>LEI: S6XOOCT0IEG5ABCC6L87 | Long             | ABS-MBS          | USGSE             | US        |     12129 | PA      | $12031.23     | 0.01%             | 2040-11-15      | Floating      | 4.29%                 | No            |                  2 | On Loan: No      |
| Freddie Mac                                    | Freddie Mac REMICS                                                                                            | CUSIP: 3137AT2J0<br>LEI: S6XOOCT0IEG5ABCC6L87 | Long             | ABS-MBS          | USGSE             | US        |   2200000 | PA      | $2139790.62   | 1.78%             | 2032-08-15      | Fixed         | 3.00%                 | No            |                  2 | On Loan: No      |
| Freddie Mac                                    | Freddie Mac REMICS                                                                                            | CUSIP: 3137BD4R4<br>LEI: S6XOOCT0IEG5ABCC6L87 | Long             | ABS-MBS          | USGSE             | US        |    621775 | PA      | $481275.28    | 0.40%             | 2053-04-15      | Fixed         | 3.00%                 | No            |                  2 | On Loan: No      |
| Freddie Mac                                    | Freddie Mac REMICS                                                                                            | CUSIP: 3137BDY34<br>LEI: S6XOOCT0IEG5ABCC6L87 | Long             | ABS-MBS          | USGSE             | US        |   1770779 | PA      | $1691505.58   | 1.40%             | 2044-09-15      | Fixed         | 4.00%                 | No            |                  2 | On Loan: No      |
| Freddie Mac                                    | Freddie Mac REMICS                                                                                            | CUSIP: 3137BERC0<br>LEI: S6XOOCT0IEG5ABCC6L87 | Long             | ABS-MBS          | USGSE             | US        |    946562 | PA      | $871596.55    | 0.72%             | 2054-09-15      | Fixed         | 4.00%                 | No            |                  2 | On Loan: No      |
| Fannie Mae                                     | Fannie Mae Pool                                                                                               | CUSIP: 3138L8YJ7<br>LEI: B1V7KEBTPIMZEU4LTD58 | Long             | ABS-MBS          | USGSE             | US        |    487767 | PA      | $459431.59    | 0.38%             | 2040-02-01      | Fixed         | 3.60%                 | No            |                  2 | On Loan: No      |
| Freddie Mac                                    | Freddie Mac REMICS                                                                                            | CUSIP: 31394RLM9<br>LEI: S6XOOCT0IEG5ABCC6L87 | Long             | ABS-MBS          | USGSE             | US        |     65385 | PA      | $66980.28     | 0.06%             | 2034-02-15      | Fixed         | 5.50%                 | No            |                  2 | On Loan: No      |
| FHLMC STRUCTURED PASS THROUGH                  | Freddie Mac Structured Pass-Through Certificates                                                              | CUSIP: 31395A3J2<br>LEI: 254900HROIFWPRGM1V77 | Long             | ABS-MBS          | USGSE             | US        |      2871 | PA      | $2801.90      | 0.00%             | 2044-07-25      | Floating      | 5.26%                 | No            |                  2 | On Loan: No      |
| Fannie Mae                                     | Fannie Mae REMICS                                                                                             | CUSIP: 31396VSR0<br>LEI: B1V7KEBTPIMZEU4LTD58 | Long             | ABS-MBS          | USGSE             | US        |     14415 | PA      | $14243.75     | 0.01%             | 2037-05-25      | Fixed         | 4.25%                 | No            |                  2 | On Loan: No      |
| Fannie Mae                                     | Fannie Mae Pool                                                                                               | CUSIP: 31402RFV6<br>LEI: B1V7KEBTPIMZEU4LTD58 | Long             | ABS-MBS          | USGSE             | US        |     12923 | PA      | $13020.80     | 0.01%             | 2035-06-01      | Fixed         | 5.00%                 | No            |                  2 | On Loan: No      |
| Fannie Mae                                     | Fannie Mae Pool                                                                                               | CUSIP: 31403C6L0<br>LEI: B1V7KEBTPIMZEU4LTD58 | Long             | ABS-MBS          | USGSE             | US        |     21128 | PA      | $21325.76     | 0.02%             | 2036-02-01      | Fixed         | 5.00%                 | No            |                  2 | On Loan: No      |
| Fannie Mae                                     | Fannie Mae Pool                                                                                               | CUSIP: 31418DDL3<br>LEI: B1V7KEBTPIMZEU4LTD58 | Long             | ABS-MBS          | USGSE             | US        |     18260 | PA      | $18648.02     | 0.02%             | 2049-05-01      | Fixed         | 5.50%                 | No            |                  2 | On Loan: No      |
| Fannie Mae                                     | Fannie Mae Pool                                                                                               | CUSIP: 31418E5R7<br>LEI: B1V7KEBTPIMZEU4LTD58 | Long             | ABS-MBS          | USGSE             | US        |    609877 | PA      | $630513.86    | 0.52%             | 2054-05-01      | Fixed         | 6.50%                 | No            |                  2 | On Loan: No      |
| Freddie Mac Military Housing Bonds Resec Trust | Freddie Mac Military Housing Bonds Resecuritization Trust Certificates 2015-R1                                | CUSIP: 35563CAJ7<br>LEI: 549300ZG8WH0M4JSUM77 | Long             | ABS-MBS          | USGSE             | US        |    536568 | PA      | $457956.11    | 0.38%             | 2052-10-25      | Variable      | 4.30%                 | No            |                  2 | On Loan: No      |
| Government National Mortgage Association       | Government National Mortgage Association                                                                      | CUSIP: 38376VKK2<br>LEI: 549300M8ZYFG0OCMTT87 | Long             | ABS-MBS          | USGA              | US        |    195566 | PA      | $156646.89    | 0.13%             | 2040-02-20      | None          | 0.00%                 | No            |                  2 | On Loan: No      |
| Government National Mortgage Association       | Government National Mortgage Association                                                                      | CUSIP: 38377GMM8<br>LEI: 549300M8ZYFG0OCMTT87 | Long             | ABS-MBS          | USGA              | US        |    118965 | PA      | $98979.24     | 0.08%             | 2035-09-20      | None          | 0.00%                 | No            |                  2 | On Loan: No      |
| Hertz Vehicle Financing LLC                    | Hertz Vehicle Financing LLC                                                                                   | CUSIP: 42806MAN9<br>LEI: 5493004IHDYOZ9K9WF47 | Long             | ABS-O            | CORP              | US        |    300000 | PA      | $293271.18    | 0.24%             | 2028-06-26      | Fixed         | 2.33%                 | No            |                  2 | On Loan: No      |
| Hilton USA Trust                               | Hilton USA Trust 2016-HHV                                                                                     | CUSIP: 43300LAA8<br>LEI: N/A                  | Long             | ABS-MBS          | CORP              | US        |    600000 | PA      | $596871.96    | 0.50%             | 2038-11-05      | Fixed         | 3.72%                 | No            |                  2 | On Loan: No      |
| JPMorgan Securities LLC                        | J P MORGAN TERM REPO                                                                                          | CUSIP: 000000000<br>LEI: ZBUT11V806EZRVTWT807 | Long             | RA               | CORP              | US        |    931875 | PA      | $931875.00    | 0.77%             |  |  |  | No            |                  2 | On Loan: No      |
| Massachusetts Educational Financing Authority  | Massachusetts Educational Financing Authority                                                                 | CUSIP: 57563NAA6<br>LEI: 5493007K5OP7V6CL0Y88 | Long             | ABS-O            | CORP              | US        |      7734 | PA      | $7733.63      | 0.01%             | 2038-04-25      | Floating      | 5.10%                 | No            |                  2 | On Loan: No      |
| Merrill Lynch Mortgage Investors Trust         | Merrill Lynch Mortgage Investors Trust MLMI Series 2003-A4                                                    | CUSIP: 589929W87<br>LEI: 9DJT3UXIJIZJI4WXO774 | Long             | ABS-MBS          | CORP              | US        |       371 | PA      | $366.26       | 0.00%             | 2033-05-25      | Variable      | 7.00%                 | No            |                  2 | On Loan: No      |
| New Residential Mortgage Loan Trust            | New Residential Mortgage Loan Trust 2020-RPL1                                                                 | CUSIP: 64828XAA1<br>LEI: 2138001CG5SYL78G3648 | Long             | ABS-MBS          | CORP              | US        |     55386 | PA      | $53158.56     | 0.04%             | 2059-11-25      | Variable      | 2.75%                 | No            |                  2 | On Loan: No      |
| RESOLUTION FUNDING STRIP                       | Resolution Funding Corp Interest Strip                                                                        | CUSIP: 76116EHK9<br>LEI: N/A                  | Long             | DBT              | USGA              | US        |    400000 | PA      | $369378.68    | 0.31%             | 2028-04-15      | None          | 0.00%                 | No            |                  2 | On Loan: No      |
| Structured Asset Mortgage Investments Inc      | Structured Asset Mortgage Investments II Trust 2004-AR5                                                       | CUSIP: 86359LDX4<br>LEI: N/A                  | Long             | ABS-MBS          | CORP              | US        |       830 | PA      | $805.35       | 0.00%             | 2034-10-19      | Floating      | 4.45%                 | No            |                  2 | On Loan: No      |
| TENN VALLEY AUTH                               | Tennessee Valley Authority Principal Strip                                                                    | CUSIP: 88059FBG5<br>LEI: 549300HE1ISW43LNKM54 | Long             | DBT              | USGA              | US        |    500000 | PA      | $422542.56    | 0.35%             | 2030-05-01      | None          | 0.00%                 | No            |                  2 | On Loan: No      |
| Towd Point Mortgage Trust                      | Towd Point Mortgage Trust 2020-1                                                                              | CUSIP: 89178WBB3<br>LEI: 25490010CSYSAQU59J50 | Long             | ABS-MBS          | CORP              | US        |    200000 | PA      | $183907.76    | 0.15%             | 2060-01-25      | Variable      | 3.10%                 | No            |                  2 | On Loan: No      |
| United States Treasury                         | U.S. Treasury Bonds                                                                                           | CUSIP: 912810QQ4<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |  16080000 | PA      | $15486421.92  | 12.85%            | 2041-05-15      | Fixed         | 4.38%                 | No            |                  2 | On Loan: No      |
| US TREASURY N/B                                | U.S. Treasury Bonds                                                                                           | CUSIP: 912810QZ4<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |    600000 | PA      | $480398.44    | 0.40%             | 2043-02-15      | Fixed         | 3.13%                 | No            |                  2 | On Loan: No      |
| United States Treasury                         | U.S. Treasury Bonds                                                                                           | CUSIP: 912810RH3<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   2920000 | PA      | $2289120.31   | 1.90%             | 2044-08-15      | Fixed         | 3.13%                 | No            |                  2 | On Loan: No      |
| US TREASURY N/B                                | U.S. Treasury Bonds                                                                                           | CUSIP: 912810RJ9<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   1620000 | PA      | $1240439.05   | 1.03%             | 2044-11-15      | Fixed         | 3.00%                 | No            |                  2 | On Loan: No      |
| United States Treasury                         | U.S. Treasury Bonds                                                                                           | CUSIP: 912810RK6<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   1440000 | PA      | $1009856.25   | 0.84%             | 2045-02-15      | Fixed         | 2.50%                 | No            |                  2 | On Loan: No      |
| United States Treasury                         | U.S. Treasury Bonds                                                                                           | CUSIP: 912810RM2<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   1410000 | PA      | $1073032.02   | 0.89%             | 2045-05-15      | Fixed         | 3.00%                 | No            |                  2 | On Loan: No      |
| United States Treasury                         | U.S. Treasury Bonds                                                                                           | CUSIP: 912810RP5<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |    370000 | PA      | $279682.42    | 0.23%             | 2045-11-15      | Fixed         | 3.00%                 | No            |                  2 | On Loan: No      |
| United States Treasury                         | U.S. Treasury Bonds                                                                                           | CUSIP: 912810RQ3<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |    850000 | PA      | $586433.60    | 0.49%             | 2046-02-15      | Fixed         | 2.50%                 | No            |                  2 | On Loan: No      |
| United States Treasury                         | U.S. Treasury Bonds                                                                                           | CUSIP: 912810RV2<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |    900000 | PA      | $670570.31    | 0.56%             | 2047-02-15      | Fixed         | 3.00%                 | No            |                  2 | On Loan: No      |
| United States Treasury                         | U.S. Treasury Bonds                                                                                           | CUSIP: 912810RX8<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |    500000 | PA      | $371601.56    | 0.31%             | 2047-05-15      | Fixed         | 3.00%                 | No            |                  2 | On Loan: No      |
| United States Treasury                         | U.S. Treasury Bonds                                                                                           | CUSIP: 912810RZ3<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   1800000 | PA      | $1269632.81   | 1.05%             | 2047-11-15      | Fixed         | 2.75%                 | No            |                  2 | On Loan: No      |
| United States Treasury                         | U.S. Treasury Bonds                                                                                           | CUSIP: 912810SA7<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |    330000 | PA      | $243349.22    | 0.20%             | 2048-02-15      | Fixed         | 3.00%                 | No            |                  2 | On Loan: No      |
| United States Treasury                         | U.S. Treasury Bonds                                                                                           | CUSIP: 912810SC3<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   2430000 | PA      | $1828669.92   | 1.52%             | 2048-05-15      | Fixed         | 3.13%                 | No            |                  2 | On Loan: No      |
| United States Treasury                         | U.S. Treasury Bonds                                                                                           | CUSIP: 912810SD1<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   4000000 | PA      | $2935625.00   | 2.44%             | 2048-08-15      | Fixed         | 3.00%                 | No            |                  2 | On Loan: No      |
| United States Treasury                         | U.S. Treasury Bonds                                                                                           | CUSIP: 912810SE9<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   4200000 | PA      | $3291257.80   | 2.73%             | 2048-11-15      | Fixed         | 3.38%                 | No            |                  2 | On Loan: No      |
| United States Treasury                         | U.S. Treasury Bonds                                                                                           | CUSIP: 912810SF6<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |  10470000 | PA      | $7646780.83   | 6.34%             | 2049-02-15      | Fixed         | 3.00%                 | No            |                  2 | On Loan: No      |
| United States Treasury                         | U.S. Treasury Bonds                                                                                           | CUSIP: 912810SH2<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   1750000 | PA      | $1244140.63   | 1.03%             | 2049-05-15      | Fixed         | 2.88%                 | No            |                  2 | On Loan: No      |
| United States Treasury                         | U.S. Treasury Bonds                                                                                           | CUSIP: 912810SJ8<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |    300000 | PA      | $186597.66    | 0.15%             | 2049-08-15      | Fixed         | 2.25%                 | No            |                  2 | On Loan: No      |
| United States Treasury                         | U.S. Treasury Bonds                                                                                           | CUSIP: 912810SL3<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |  12920000 | PA      | $7521862.50   | 6.24%             | 2050-02-15      | Fixed         | 2.00%                 | No            |                  2 | On Loan: No      |
| United States Treasury                         | U.S. Treasury Bonds                                                                                           | CUSIP: 912810SP4<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   1080000 | PA      | $528103.13    | 0.44%             | 2050-08-15      | Fixed         | 1.38%                 | No            |                  2 | On Loan: No      |
| United States Treasury                         | U.S. Treasury Bonds                                                                                           | CUSIP: 912810SQ2<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |  40890000 | PA      | $25490762.21  | 21.15%            | 2040-08-15      | Fixed         | 1.13%                 | No            |                  2 | On Loan: No      |
| United States Treasury                         | U.S. Treasury Bonds                                                                                           | CUSIP: 912810SR0<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   1650000 | PA      | $1039371.10   | 0.86%             | 2040-05-15      | Fixed         | 1.13%                 | No            |                  2 | On Loan: No      |
| United States Treasury                         | U.S. Treasury Bonds                                                                                           | CUSIP: 912810SS8<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |    400000 | PA      | $208703.12    | 0.17%             | 2050-11-15      | Fixed         | 1.63%                 | No            |                  2 | On Loan: No      |
| United States Treasury                         | U.S. Treasury Bonds                                                                                           | CUSIP: 912810ST6<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   9800000 | PA      | $6312578.08   | 5.24%             | 2040-11-15      | Fixed         | 1.38%                 | No            |                  2 | On Loan: No      |
| United States Treasury                         | U.S. Treasury Bonds                                                                                           | CUSIP: 912810SW9<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   1900000 | PA      | $1316269.54   | 1.09%             | 2041-02-15      | Fixed         | 1.88%                 | No            |                  2 | On Loan: No      |
| United States Treasury                         | U.S. Treasury Bonds                                                                                           | CUSIP: 912810SX7<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   2300000 | PA      | $1438847.66   | 1.19%             | 2051-05-15      | Fixed         | 2.38%                 | No            |                  2 | On Loan: No      |
| United States Treasury                         | U.S. Treasury Bonds                                                                                           | CUSIP: 912810TJ7<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   4500000 | PA      | $3198867.21   | 2.65%             | 2052-08-15      | Fixed         | 3.00%                 | No            |                  2 | On Loan: No      |
| United States Treasury                         | U.S. Treasury Bonds                                                                                           | CUSIP: 912810TK4<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   9500000 | PA      | $7935097.68   | 6.58%             | 2042-08-15      | Fixed         | 3.38%                 | No            |                  2 | On Loan: No      |
| United States Treasury                         | U.S. Treasury Bonds                                                                                           | CUSIP: 912810TL2<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |  15830000 | PA      | $13600814.49  | 11.28%            | 2052-11-15      | Fixed         | 4.00%                 | No            |                  2 | On Loan: No      |
| United States Treasury                         | U.S. Treasury Bonds                                                                                           | CUSIP: 912810TM0<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   2800000 | PA      | $2533671.87   | 2.10%             | 2042-11-15      | Fixed         | 4.00%                 | No            |                  2 | On Loan: No      |
| United States Treasury                         | U.S. Treasury Bonds                                                                                           | CUSIP: 912810TN8<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   2900000 | PA      | $2327476.55   | 1.93%             | 2053-02-15      | Fixed         | 3.63%                 | No            |                  2 | On Loan: No      |
| United States Treasury                         | U.S. Treasury Bonds                                                                                           | CUSIP: 912810TQ1<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |    300000 | PA      | $266566.41    | 0.22%             | 2043-02-15      | Fixed         | 3.88%                 | No            |                  2 | On Loan: No      |
| United States Treasury                         | U.S. Treasury Bonds                                                                                           | CUSIP: 912810TR9<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   1400000 | PA      | $1122570.32   | 0.93%             | 2053-05-15      | Fixed         | 3.63%                 | No            |                  2 | On Loan: No      |
| United States Treasury                         | U.S. Treasury Bonds                                                                                           | CUSIP: 912810TS7<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   3100000 | PA      | $2747496.09   | 2.28%             | 2043-05-15      | Fixed         | 3.88%                 | No            |                  2 | On Loan: No      |
| United States Treasury                         | U.S. Treasury Bonds                                                                                           | CUSIP: 912810TU2<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   1600000 | PA      | $1510187.50   | 1.25%             | 2043-08-15      | Fixed         | 4.38%                 | No            |                  2 | On Loan: No      |
| United States Treasury                         | U.S. Treasury Bonds                                                                                           | CUSIP: 912810TW8<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   1790000 | PA      | $1768464.06   | 1.47%             | 2043-11-15      | Fixed         | 4.75%                 | No            |                  2 | On Loan: No      |
| United States Treasury                         | U.S. Treasury Bonds                                                                                           | CUSIP: 912810TZ1<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |    400000 | PA      | $382515.62    | 0.32%             | 2044-02-15      | Fixed         | 4.50%                 | No            |                  2 | On Loan: No      |
| United States Treasury                         | U.S. Treasury Bonds                                                                                           | CUSIP: 912810UB2<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |    500000 | PA      | $484902.35    | 0.40%             | 2044-05-15      | Fixed         | 4.63%                 | No            |                  2 | On Loan: No      |
| United States Treasury                         | U.S. Treasury Bonds                                                                                           | CUSIP: 912810UD8<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   1600000 | PA      | $1451624.99   | 1.20%             | 2044-08-15      | Fixed         | 4.13%                 | No            |                  2 | On Loan: No      |
| United States Treasury                         | U.S. Treasury Bonds                                                                                           | CUSIP: 912810UF3<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |    700000 | PA      | $677332.03    | 0.56%             | 2044-11-15      | Fixed         | 4.63%                 | No            |                  2 | On Loan: No      |
| United States Treasury                         | U.S. Treasury Bonds                                                                                           | CUSIP: 912810UG1<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |  10900000 | PA      | $10396300.75  | 8.63%             | 2055-02-15      | Fixed         | 4.63%                 | No            |                  2 | On Loan: No      |
| United States Treasury                         | U.S. Treasury Bonds                                                                                           | CUSIP: 912810UJ5<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |    300000 | PA      | $294773.44    | 0.24%             | 2045-02-15      | Fixed         | 4.75%                 | No            |                  2 | On Loan: No      |
| United States Treasury                         | U.S. Treasury Bonds                                                                                           | CUSIP: 912810UK2<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |    900000 | PA      | $876339.85    | 0.73%             | 2055-05-15      | Fixed         | 4.75%                 | No            |                  2 | On Loan: No      |
| United States Treasury                         | U.S. Treasury Bonds                                                                                           | CUSIP: 912810UL0<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |    500000 | PA      | $506503.91    | 0.42%             | 2045-05-15      | Fixed         | 5.00%                 | No            |                  2 | On Loan: No      |
| United States Treasury                         | U.S. Treasury Bonds                                                                                           | CUSIP: 912810UN6<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   2660000 | PA      | $2651271.88   | 2.20%             | 2045-08-15      | Fixed         | 4.88%                 | No            |                  2 | On Loan: No      |
| United States Treasury                         | U.S. Treasury Bonds                                                                                           | CUSIP: 912810UQ9<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   2700000 | PA      | $2604234.38   | 2.16%             | 2045-11-15      | Fixed         | 4.63%                 | No            |                  2 | On Loan: No      |
| United States Treasury                         | U.S. Treasury Bonds                                                                                           | CUSIP: 912810UT3<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |    400000 | PA      | $385625.00    | 0.32%             | 2046-02-15      | Fixed         | 4.63%                 | No            |                  2 | On Loan: No      |
| United States Treasury                         | U.S. Treasury Notes                                                                                           | CUSIP: 91282CDL2<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |    700000 | PA      | $659148.43    | 0.55%             | 2028-11-30      | Fixed         | 1.50%                 | No            |                  2 | On Loan: No      |
| United States Treasury                         | U.S. Treasury Inflation-Indexed Notes                                                                         | CUSIP: 91282CDX6<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |    469280 | PA      | $431844.01    | 0.36%             | 2032-01-15      | Fixed         | 0.13%                 | No            |                  2 | On Loan: No      |
| United States Treasury                         | U.S. Treasury Notes                                                                                           | CUSIP: 91282CEE7<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |    900000 | PA      | $863191.40    | 0.72%             | 2029-03-31      | Fixed         | 2.38%                 | No            |                  2 | On Loan: No      |
| United States Treasury                         | U.S. Treasury Notes                                                                                           | CUSIP: 91282CEV9<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |    400000 | PA      | $392734.38    | 0.33%             | 2029-06-30      | Fixed         | 3.25%                 | No            |                  2 | On Loan: No      |
| United States Treasury                         | U.S. Treasury Inflation-Indexed Notes                                                                         | CUSIP: 91282CEZ0<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   1792512 | PA      | $1691126.02   | 1.40%             | 2032-07-15      | Fixed         | 0.63%                 | No            |                  2 | On Loan: No      |
| United States Treasury                         | U.S. Treasury Inflation-Indexed Notes                                                                         | CUSIP: 91282CGK1<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   2338506 | PA      | $2252178.61   | 1.87%             | 2033-01-15      | Fixed         | 1.13%                 | No            |                  2 | On Loan: No      |
| United States Treasury                         | U.S. Treasury Notes                                                                                           | CUSIP: 91282CGS4<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |    200000 | PA      | $197929.69    | 0.16%             | 2030-03-31      | Fixed         | 3.63%                 | No            |                  2 | On Loan: No      |
| United States Treasury                         | U.S. Treasury Inflation-Indexed Notes                                                                         | CUSIP: 91282CJY8<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   2753244 | PA      | $2741476.08   | 2.27%             | 2034-01-15      | Fixed         | 1.75%                 | No            |                  2 | On Loan: No      |
| United States Treasury                         | U.S. Treasury Inflation-Indexed Notes                                                                         | CUSIP: 91282CLE9<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |    207286 | PA      | $208294.75    | 0.17%             | 2034-07-15      | Fixed         | 1.88%                 | No            |                  2 | On Loan: No      |
| United States Treasury                         | U.S. Treasury Notes                                                                                           | CUSIP: 91282CLX7<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |    100000 | PA      | $100429.69    | 0.08%             | 2027-11-15      | Fixed         | 4.13%                 | No            |                  2 | On Loan: No      |
| United States Treasury                         | U.S. Treasury Inflation-Indexed Notes                                                                         | CUSIP: 91282CML2<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |    309150 | PA      | $314361.98    | 0.26%             | 2035-01-15      | Fixed         | 2.13%                 | No            |                  2 | On Loan: No      |
| United States Treasury                         | U.S. Treasury Notes                                                                                           | CUSIP: 91282CNM9<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   2500000 | PA      | $2502929.70   | 2.08%             | 2028-07-15      | Fixed         | 3.88%                 | No            |                  2 | On Loan: No      |
| United States Treasury                         | U.S. Treasury STRIPS Coupon                                                                                   | CUSIP: 9128334Y3<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |    850000 | PA      | $593582.84    | 0.49%             | 2034-08-15      | None          | 0.00%                 | No            |                  2 | On Loan: No      |
| United States Treasury                         | U.S. Treasury STRIPS Coupon                                                                                   | CUSIP: 912834KH0<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |     40000 | PA      | $18970.40     | 0.02%             | 2041-05-15      | None          | 0.00%                 | No            |                  2 | On Loan: No      |
| United States Treasury                         | U.S. Treasury STRIPS Coupon                                                                                   | CUSIP: 912834KP2<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |     50000 | PA      | $23372.38     | 0.02%             | 2041-08-15      | None          | 0.00%                 | No            |                  2 | On Loan: No      |
| United States Treasury                         | U.S. Treasury STRIPS Coupon                                                                                   | CUSIP: 912834KV9<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |     80000 | PA      | $36808.73     | 0.03%             | 2041-11-15      | None          | 0.00%                 | No            |                  2 | On Loan: No      |
| United States Treasury                         | U.S. Treasury STRIPS Coupon                                                                                   | CUSIP: 912834LK2<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |     70000 | PA      | $31272.58     | 0.03%             | 2042-05-15      | None          | 0.00%                 | No            |                  2 | On Loan: No      |
| United States Treasury                         | U.S. Treasury STRIPS Coupon                                                                                   | CUSIP: 912834LR7<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |    220000 | PA      | $96706.90     | 0.08%             | 2042-08-15      | None          | 0.00%                 | No            |                  2 | On Loan: No      |
| United States Treasury                         | U.S. Treasury STRIPS Coupon                                                                                   | CUSIP: 912834LX4<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |     50000 | PA      | $21659.01     | 0.02%             | 2042-11-15      | None          | 0.00%                 | No            |                  2 | On Loan: No      |
| Chicago Mercantile Exchange                    | Long: BWU01D5J2 IRS USD R V 12MSOFR SWUV1D5J4 CCPOIS / Short: BWU01D5J2 IRS USD P F  1.75000 SWU01D5J2 CCPOIS | CUSIP: 000000000<br>LEI: SNZ2OJLFK8MNNCLQOF39 | N/A              | DIR              |  | US        |    500000 | OU      | $198721.35    | 0.16%             |  |  |  | No            |                  2 | On Loan: No      |
| LCH Ltd.                                       | Long: BWU01UNW5 IRS USD R V 03MSOFR SWUV1UNW7 CCPOIS / Short: BWU01UNW5 IRS USD P F  1.25000 SWU01UNW5 CCPOIS | CUSIP: 000000000<br>LEI: F226TOH6YD6XJB17KS62 | N/A              | DIR              |  | US        |   3110000 | OU      | $1101968.79   | 0.91%             |  |  |  | No            |                  2 | On Loan: No      |
| Chicago Mercantile Exchange                    | Long: BWU025U84 IRS USD R V 12MSOFR SWUV25U86 CCPOIS / Short: BWU025U84 IRS USD P F  3.50000 SWU025U84 CCPOIS | CUSIP: 000000000<br>LEI: SNZ2OJLFK8MNNCLQOF39 | N/A              | DIR              |  | US        |   2800000 | OU      | $309297.52    | 0.26%             |  |  |  | No            |                  2 | On Loan: No      |
| Chicago Mercantile Exchange                    | 3 MONTH SOFR FUT MAR27                                                                                        | CUSIP: 000000000<br>LEI: SNZ2OJLFK8MNNCLQOF39 | N/A              | DIR              |  | US        |        34 | NC      | $-45777.26    | -0.04%            |  |  |  | No            |                  1 | On Loan: No      |
| Chicago Mercantile Exchange                    | 3 MONTH SOFR FUT JUN27                                                                                        | CUSIP: 000000000<br>LEI: SNZ2OJLFK8MNNCLQOF39 | N/A              | DIR              |  | US        |        34 | NC      | $-39953.26    | -0.03%            |  |  |  | No            |                  1 | On Loan: No      |
| Chicago Mercantile Exchange                    | 3 MONTH SOFR FUT SEP27                                                                                        | CUSIP: 000000000<br>LEI: SNZ2OJLFK8MNNCLQOF39 | N/A              | DIR              |  | US        |        34 | NC      | $-28083.32    | -0.02%            |  |  |  | No            |                  1 | On Loan: No      |
| Chicago Board of Trade                         | US LONG BOND(CBT) JUN26                                                                                       | CUSIP: 000000000<br>LEI: 549300EX04Q2QBFQTQ27 | N/A              | DIR              |  | US        |       -74 | NC      | $229991.63    | 0.19%             |  |  |  | No            |                  1 | On Loan: No      |
| Chicago Board of Trade                         | US ULTRA BOND CBT JUN26                                                                                       | CUSIP: 000000000<br>LEI: 549300EX04Q2QBFQTQ27 | N/A              | DIR              |  | US        |        -4 | NC      | $15628.11     | 0.01%             |  |  |  | No            |                  1 | On Loan: No      |
| Chicago Board of Trade                         | US 10YR NOTE (CBT)JUN26                                                                                       | CUSIP: 000000000<br>LEI: 549300EX04Q2QBFQTQ27 | N/A              | DIR              |  | US        |        38 | NC      | $-48205.64    | -0.04%            |  |  |  | No            |                  1 | On Loan: No      |
| Chicago Board of Trade                         | US 5YR NOTE (CBT) JUN26                                                                                       | CUSIP: 000000000<br>LEI: 549300EX04Q2QBFQTQ27 | N/A              | DIR              |  | US        |      -123 | NC      | $133361.92    | 0.11%             |  |  |  | No            |                  1 | On Loan: No      |
| Chicago Board of Trade                         | US 2YR NOTE (CBT) JUN26                                                                                       | CUSIP: 000000000<br>LEI: 549300EX04Q2QBFQTQ27 | N/A              | DIR              |  | US        |        -5 | NC      | $7279.10      | 0.01%             |  |  |  | No            |                  1 | On Loan: No      |
| Chicago Board of Trade                         | US 10YR ULTRA FUT JUN26                                                                                       | CUSIP: 000000000<br>LEI: 549300EX04Q2QBFQTQ27 | N/A              | DIR              |  | US        |      -256 | NC      | $663877.89    | 0.55%             |  |  |  | No            |                  1 | On Loan: No      |

### Signature

**Date Signed:** 2026-04-28

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

**Signature:** Linda Wisniewski

**Name of Signer:** Linda Wisniewski

**Title:** Controller and Chief Accounting Officer