# EDGAR Filing Document

**Accession Number:** 0000880195
**File Stem:** 0000035402-26-002598
**Filing Date:** 2026-4
**Character Count:** 6113
**Document Hash:** a0f6f2f868b0f9a28a658179889b7a94
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000035402-26-002598.hdr.sgml**: 20260424

**ACCESSION NUMBER**: 0000035402-26-002598

**CONFORMED SUBMISSION TYPE**: NPORT-P

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20260228

**FILED AS OF DATE**: 20260424

**DATE AS OF CHANGE**: 20260424

**PERIOD START**: 20260228

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** FIDELITY ABERDEEN STREET TRUST
- **CENTRAL INDEX KEY:** 0000880195

**ORGANIZATION NAME:**
- **EIN:** 000000000
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 0331

**FILING VALUES:**
- **FORM TYPE:** NPORT-P
- **SEC ACT:** 1940 Act
- **SEC FILE NUMBER:** 811-06440
- **FILM NUMBER:** 26895411

**BUSINESS ADDRESS:**
- **STREET 1:** 245 SUMMER STREET
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02210
- **BUSINESS PHONE:** 617-563-7000

**MAIL ADDRESS:**
- **STREET 1:** 245 SUMMER STREET
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02210

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** FIDELITY INSTITUTIONAL INVESTORS TRUST
- **DATE OF NAME CHANGE:** 19920811

## Series and Classes Contracts Data

### Fidelity Multi-Asset Index Fund (Series ID: S000040658)

| Class ID   | Class Name                      | Ticker Symbol   |
|:---|:---|:---|
| C000126039 | Fidelity Multi-Asset Index Fund | FFNOX           |

## Form NPORT-P: Monthly Portfolio Investments Report

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

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

- **a. Name of Registrant:** Fidelity Aberdeen Street Trust

- **b. Investment Company Act file number:** 811-06440

- **c. CIK number of Registrant:** 0000880195

- **d. LEI of Registrant:** EH5MGE941XHR05KZ4E50

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

  - **Street Address 1:** 245 Summer Street

  - **City:** Boston

  - **State:** MA

  - **Foreign country:** US

  - **Zip / Postal Code:** 02210

  - **Telephone number:** 1-800-FIDELITY

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

- **a. Name of Series:** Fidelity Multi-Asset Index Fund

- **b. EDGAR series identifier (if any):** S000040658

- **c. LEI of Series:** SMVYD67QFCMOZKTJ2N09

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

- **a. Date of fiscal year-end:** 2026-02-28

- **b. Date as of which information is reported:** 2026-02-28

**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:** $10135652935.04

**Total Liabilities:** $837786.52

**Net Assets:** $10134815148.52

**Cash Not Reported:** $3424316.66

**Monthly Return Information**

| Class               | Month 1 Return (%)   | Month 2 Return (%)   | Month 3 Return (%)   |
|:---|:---|:---|:---|
| Class ID C000126039 | 0.78%                | 2.88%                | 1.87%                |

**Monthly Gains & Losses**

| Period   | Net Realized Gain/Loss   | Net Unrealized Appreciation/Depreciation   |
|:---|:---|:---|
| Month 1  | $2079650.10              | $-48444618.11                              |
| Month 2  | $329037.29               | $273925739.48                              |
| Month 3  | $18279315.48             | $164339616.45                              |

### 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   |
|:---|:---|:---|:---|:---|:---|:---|---:|:---|:---|:---|:---|:---|:---|:---|---:|:---|
| Fidelity Concord Street Trust | Fidelity International Index Fund           | CUSIP: 315911727<br>LEI: EEX0N4ID1C226M44VF22 | Long             | EC               | RF                | US        |  37373622 | NS      | $2499547808.42 | 24.66%            |  |  |  | No            |                  1 | On Loan: No      |
| Fidelity Concord Street Trust | FIDELITY EXTENDED MARKET INDEX FUND         | CUSIP: 315911743<br>LEI: EEX0N4ID1C226M44VF22 | Long             | EC               | RF                | US        |   9634676 | NS      | $1003740568.78 | 9.90%             |  |  |  | No            |                  1 | On Loan: No      |
| Fidelity Concord Street Trust | FIDELITY 500 INDEX FUNDADVANTAGE IN         | CUSIP: 315911750<br>LEI: EEX0N4ID1C226M44VF22 | Long             | EC               | RF                | US        |  16932778 | NS      | $4052521660.30 | 39.99%            |  |  |  | No            |                  1 | On Loan: No      |
| Fidelity Salem Street Trust   | Fidelity Emerging Markets Index Fund        | CUSIP: 316146331<br>LEI: S4W85DGKOEJ24DPRB829 | Long             | EC               | RF                | US        |  67133972 | NS      | $1049975323.64 | 10.36%            |  |  |  | No            |                  1 | On Loan: No      |
| Fidelity Salem Street Trust   | FIDELITY US BOND INDEX FUNDFIDELITY ADV     | CUSIP: 316146356<br>LEI: S4W85DGKOEJ24DPRB829 | Long             | EC               | RF                | US        |  66177533 | NS      | $707437828.35  | 6.98%             |  |  |  | No            |                  1 | On Loan: No      |
| Fidelity Salem Street Trust   | Fidelity Long-Term Treasury Bond Index Fund | CUSIP: 31635V232<br>LEI: S4W85DGKOEJ24DPRB829 | Long             | EC               | RF                | US        |  53786116 | NS      | $516884578.51  | 5.10%             |  |  |  | No            |                  1 | On Loan: No      |
| Fidelity Salem Street Trust   | FIDELITY INTERNATIONAL BOND INDEX FUND      | CUSIP: 31635T732<br>LEI: S4W85DGKOEJ24DPRB829 | Long             | EC               | RF                | US        |  32280087 | NS      | $301818812.26  | 2.98%             |  |  |  | No            |                  1 | On Loan: No      |

### Signature

**Date Signed:** 2026-03-30

**Name of Applicant:** Laura M. Del Prato

**Signature:** Laura M. Del Prato

**Name of Signer:** Laura M. Del Prato

**Title:** President and Treasurer