# EDGAR Filing Document

**Accession Number:** 0000035315
**File Stem:** 0000823535-23-000033
**Filing Date:** 2023-3
**Character Count:** 4111
**Document Hash:** 55256a39a53a9de6a61df05995dc0987
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000823535-23-000033.hdr.sgml**: 20230331

**ACCESSION NUMBER**: 0000823535-23-000033

**CONFORMED SUBMISSION TYPE**: 497K

**PUBLIC DOCUMENT COUNT**: 2

**FILED AS OF DATE**: 20230331

**DATE AS OF CHANGE**: 20230331

**EFFECTIVENESS DATE**: 20230331

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** FIDELITY SALEM STREET TRUST
- **CENTRAL INDEX KEY:** 0000035315
- **IRS NUMBER:** 000000000
- **STATE OF INCORPORATION:** MA
- **FISCAL YEAR END:** 0430

**FILING VALUES:**
- **FORM TYPE:** 497K
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 002-41839
- **FILM NUMBER:** 23785166

**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 FIXED INCOME TRUST
- **DATE OF NAME CHANGE:** 19920703

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** FIDELITY FLEXIBLE BOND FUND
- **DATE OF NAME CHANGE:** 19860904

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** FIDELITY CORPORATE BOND FUND INC
- **DATE OF NAME CHANGE:** 19851225

## Series and Classes Contracts Data

### Fidelity Sustainable Low Duration Bond Fund (Series ID: S000075894)

| Class ID   | Class Name                                                   | Ticker Symbol   |
|:---|:---|:---|
| C000235229 | Fidelity Advisor Sustainable Low Duration Bond Fund: Class A | FAMZX           |
| C000235230 | Fidelity Advisor Sustainable Low Duration Bond Fund: Class M | FAPBX           |
| C000235231 | Fidelity Advisor Sustainable Low Duration Bond Fund: Class C | FANDX           |
| C000235232 | Fidelity Advisor Sustainable Low Duration Bond Fund: Class I | FAPDX           |
| C000235233 | Fidelity Advisor Sustainable Low Duration Bond Fund: Class Z | FAPEX           |
| C000235234 | Fidelity Sustainable Low Duration Bond Fund                  | FAPGX           |

**Supplement to the**

**Fidelity® Sustainable Low Duration Bond Fund**

**October 29, 2022**

**Summary Prospectus**

Effective April 1, 2023, FMR reduced the fund's management fee. The following information replaces similar information found in the "Fund Summary" section under the "Fee Table" heading.

**Annual Operating Expenses**

**(expenses that you pay each year as a % of the value of your investment)**

---

| | |
|:---|:---|
| Management fee <sup>A</sup> | 0.20% |
| Distribution and/or Service (12b-1) fees |  |
| Other expenses<sup>A</sup> | 0.09% |
| **Total annual operating expenses** | 0.29% |
| Fee waiver and/or expense reimbursement<sup>B</sup> | 0.04% |
| **Total annual operating expenses after fee waiver and/or expense reimbursement** | 0.25% |

---

<sup>A</sup>Adjusted to reflect current fees.

<sup>B</sup>Fidelity Management & Research Company LLC (FMR) has contractually agreed to reimburse the fund to the extent that total operating expenses (excluding interest, certain taxes, fees and expenses of the Independent Trustees, proxy and shareholder meeting expenses, extraordinary expenses, and acquired fund fees and expenses (including fees and expenses associated with a wholly owned subsidiary), if any, as well as non-operating expenses such as brokerage commissions and fees and expenses associated with the fund's securities lending program, if applicable), as a percentage of its average net assets, exceed 0.25% (the Expense Cap). If at any time during the current fiscal year expenses for the fund fall below the Expense Cap, FMR reserves the right to recoup through the end of the fiscal year any expenses that were reimbursed during the current fiscal year up to, but not in excess of, the Expense Cap. This arrangement will remain in effect through December 31, 2024. FMR may not terminate this arrangement before the expiration date without the approval of the Board of Trustees and may extend it in its discretion after that date.

---

| | |
|:---|:---|
| 1 year | $26 |
| 3 years | $86 |

---

SLD-SUSTK-0423-100 1.9909569.100 April 1, 2023