# EDGAR Filing Document

**Accession Number:** 0000035315
**File Stem:** 0000035315-25-001189
**Filing Date:** 2025-12
**Character Count:** 32913
**Document Hash:** 74ccf3ba440a3fdba0e48d12999bbcdb
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000035315-25-001189.hdr.sgml**: 20251212

**ACCESSION NUMBER**: 0000035315-25-001189

**CONFORMED SUBMISSION TYPE**: 497

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20251212

**DATE AS OF CHANGE**: 20251212

**EFFECTIVENESS DATE**: 20251212

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** FIDELITY SALEM STREET TRUST
- **CENTRAL INDEX KEY:** 0000035315

**ORGANIZATION NAME:**
- **EIN:** 000000000
- **STATE OF INCORPORATION:** MA
- **FISCAL YEAR END:** 0430

**FILING VALUES:**
- **FORM TYPE:** 497
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 002-41839
- **FILM NUMBER:** 251566754

**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 Investment Grade Bond Fund (Series ID: S000007004)

---

|  |  |  |
|:---|:---|:---|
| Class Name                                           | Ticker Symbol | Class ID   |
| Fidelity Investment Grade Bond Fund                  | FBNDX         | C000019120 |
| Fidelity Advisor Investment Grade Bond Fund: Class A | FGBAX         | C000019121 |
| Fidelity Advisor Investment Grade Bond Fund: Class C | FGBCX         | C000019123 |
| Fidelity Advisor Investment Grade Bond Fund: Class M | FGBTX         | C000019124 |
| Fidelity Advisor Investment Grade Bond Fund: Class I | FGBPX         | C000019125 |
| Fidelity Advisor Investment Grade Bond Fund: Class Z | FIKQX         | C000205019 |

---

### Fidelity Short-Term Bond Fund (Series ID: S000007007)

---

|  |  |  |
|:---|:---|:---|
| Class Name                                     | Ticker Symbol | Class ID   |
| Fidelity Short-Term Bond Fund                  | FSHBX         | C000019128 |
| Fidelity Advisor Short-Term Bond Fund: Class A | FBNAX         | C000171437 |
| Fidelity Advisor Short-Term Bond Fund: Class M | FBNTX         | C000171438 |
| Fidelity Advisor Short-Term Bond Fund: Class C | FANCX         | C000171439 |
| Fidelity Advisor Short-Term Bond Fund: Class I | FBNIX         | C000171440 |
| Fidelity Advisor Short-Term Bond Fund: Class Z | FIKTX         | C000205020 |

---

### Fidelity Intermediate Bond Fund (Series ID: S000017674)

---

|  |  |  |
|:---|:---|:---|
| Class Name                      | Ticker Symbol | Class ID   |
| Fidelity Intermediate Bond Fund | FTHRX         | C000048836 |

---

### Fidelity Strategic Real Return Fund (Series ID: S000017675)

---

|  |  |  |
|:---|:---|:---|
| Class Name                                           | Ticker Symbol | Class ID   |
| Fidelity Strategic Real Return Fund                  | FSRRX         | C000048837 |
| Fidelity Advisor Strategic Real Return Fund: Class A | FSRAX         | C000048838 |
| Fidelity Advisor Strategic Real Return Fund: Class C | FCSRX         | C000048840 |
| Fidelity Advisor Strategic Real Return Fund: Class M | FSRTX         | C000048841 |
| Fidelity Advisor Strategic Real Return Fund: Class I | FSIRX         | C000048842 |
| Fidelity Advisor Strategic Real Return Fund: Class Z | FIQDX         | C000205021 |
| Class K6                                             | FSRKX         | C000214978 |

---

### Fidelity Strategic Dividend & Income Fund (Series ID: S000017681)

---

|  |  |  |
|:---|:---|:---|
| Class Name                                                 | Ticker Symbol | Class ID   |
| Fidelity Strategic Dividend & Income Fund                  | FSDIX         | C000048851 |
| Fidelity Advisor Strategic Dividend & Income Fund: Class A | FASDX         | C000048852 |
| Fidelity Advisor Strategic Dividend & Income Fund: Class C | FCSDX         | C000048854 |
| Fidelity Advisor Strategic Dividend & Income Fund: Class M | FTSDX         | C000048855 |
| Fidelity Advisor Strategic Dividend & Income Fund: Class I | FSIDX         | C000048856 |
| Fidelity Advisor Strategic Dividend & Income Fund: Class Z | FIQWX         | C000205022 |

---

### Fidelity Series Investment Grade Bond Fund (Series ID: S000023604)

---

|  |  |  |
|:---|:---|:---|
| Class Name                                 | Ticker Symbol | Class ID   |
| Fidelity Series Investment Grade Bond Fund | FSIGX         | C000069436 |

---

### Fidelity Conservative Income Bond Fund (Series ID: S000031520)

---

|  |  |  |
|:---|:---|:---|
| Class Name                                              | Ticker Symbol | Class ID   |
| Fidelity Conservative Income Bond Fund                  | FCNVX         | C000098000 |
| Fidelity Advisor Conservative Income Bond Fund: Class Z | FCNYX         | C000243069 |
| Fidelity Advisor Conservative Income Bond Fund: Class A | FCNQX         | C000243070 |
| Fidelity Advisor Conservative Income Bond Fund: Class I | FCNWX         | C000243071 |

---

### Fidelity Series Short-Term Credit Fund (Series ID: S000048583)

---

|  |  |  |
|:---|:---|:---|
| Class Name                             | Ticker Symbol | Class ID   |
| Fidelity Series Short-Term Credit Fund | FYBTX         | C000153158 |

---

### Fidelity Flex Conservative Income Bond Fund (Series ID: S000062001)

---

|  |  |  |
|:---|:---|:---|
| Class Name                                  | Ticker Symbol | Class ID   |
| Fidelity Flex Conservative Income Bond Fund | FJTDX         | C000200823 |

---

### Fidelity SAI Total Bond Fund (Series ID: S000062237)

---

|  |  |  |
|:---|:---|:---|
| Class Name                   | Ticker Symbol | Class ID   |
| Fidelity SAI Total Bond Fund | FSMTX         | C000201533 |

---

### Fidelity SAI Low Duration Bond Fund (Series ID: S000069440)

---

|  |  |  |
|:---|:---|:---|
| Class Name                          | Ticker Symbol | Class ID   |
| Fidelity SAI Low Duration Bond Fund | FZOLX         | C000221555 |

---

### Fidelity SAI Short-Term Bond Fund (Series ID: S000069441)

---

|  |  |  |
|:---|:---|:---|
| Class Name                        | Ticker Symbol | Class ID   |
| Fidelity SAI Short-Term Bond Fund | FZOMX         | C000221556 |

---

### Fidelity Tactical Bond Fund (Series ID: S000075287)

---

|  |  |  |
|:---|:---|:---|
| Class Name                                   | Ticker Symbol | Class ID   |
| Fidelity Tactical Bond Fund                  | FBAGX         | C000234189 |
| Fidelity Advisor Tactical Bond Fund: Class Z | FBAPX         | C000234190 |
| Fidelity Advisor Tactical Bond Fund: Class A | FTKAX         | C000234191 |
| Fidelity Advisor Tactical Bond Fund: Class C | FTKCX         | C000234192 |
| Fidelity Advisor Tactical Bond Fund: Class M | FTYMX         | C000234193 |
| Fidelity Advisor Tactical Bond Fund: Class I | FBAHX         | C000234194 |

---

### Fidelity SAI Sustainable Core Plus Bond Fund (Series ID: S000075889)

---

|  |  |  |
|:---|:---|:---|
| Class Name                                   | Ticker Symbol | Class ID   |
| Fidelity SAI Sustainable Core Plus Bond Fund | FIABX         | C000235214 |

---

### Fidelity SAI Sustainable Low Duration Bond Fund (Series ID: S000075890)

---

|  |  |  |
|:---|:---|:---|
| Class Name                                      | Ticker Symbol | Class ID   |
| Fidelity SAI Sustainable Low Duration Bond Fund | FAPFX         | C000235215 |

---

### Fidelity Sustainable Core Plus Bond Fund (Series ID: S000075892)

---

|  |  |  |
|:---|:---|:---|
| Class Name                               | Ticker Symbol | Class ID   |
| Fidelity Sustainable Core Plus Bond Fund | FIAEX         | C000235217 |

---

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

---

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

---

### Fidelity Series Sustainable Investment Grade Bond Fund (Series ID: S000080313)

---

|  |  |  |
|:---|:---|:---|
| Class Name                                             | Ticker Symbol | Class ID   |
| Fidelity Series Sustainable Investment Grade Bond Fund | FIGDX         | C000242612 |

---

## Series and Classes Contracts Data

### Fidelity Investment Grade Bond Fund (Series ID: S000007004)

| Class ID   | Class Name                                           | Ticker Symbol   |
|:---|:---|:---|
| C000019120 | Fidelity Investment Grade Bond Fund                  | FBNDX           |
| C000019121 | Fidelity Advisor Investment Grade Bond Fund: Class A | FGBAX           |
| C000019123 | Fidelity Advisor Investment Grade Bond Fund: Class C | FGBCX           |
| C000019124 | Fidelity Advisor Investment Grade Bond Fund: Class M | FGBTX           |
| C000019125 | Fidelity Advisor Investment Grade Bond Fund: Class I | FGBPX           |
| C000205019 | Fidelity Advisor Investment Grade Bond Fund: Class Z | FIKQX           |

### Fidelity Short-Term Bond Fund (Series ID: S000007007)

| Class ID   | Class Name                                     | Ticker Symbol   |
|:---|:---|:---|
| C000019128 | Fidelity Short-Term Bond Fund                  | FSHBX           |
| C000171437 | Fidelity Advisor Short-Term Bond Fund: Class A | FBNAX           |
| C000171438 | Fidelity Advisor Short-Term Bond Fund: Class M | FBNTX           |
| C000171439 | Fidelity Advisor Short-Term Bond Fund: Class C | FANCX           |
| C000171440 | Fidelity Advisor Short-Term Bond Fund: Class I | FBNIX           |
| C000205020 | Fidelity Advisor Short-Term Bond Fund: Class Z | FIKTX           |

### Fidelity Intermediate Bond Fund (Series ID: S000017674)

| Class ID   | Class Name                      | Ticker Symbol   |
|:---|:---|:---|
| C000048836 | Fidelity Intermediate Bond Fund | FTHRX           |

### Fidelity Strategic Real Return Fund (Series ID: S000017675)

| Class ID   | Class Name                                           | Ticker Symbol   |
|:---|:---|:---|
| C000048837 | Fidelity Strategic Real Return Fund                  | FSRRX           |
| C000048838 | Fidelity Advisor Strategic Real Return Fund: Class A | FSRAX           |
| C000048840 | Fidelity Advisor Strategic Real Return Fund: Class C | FCSRX           |
| C000048841 | Fidelity Advisor Strategic Real Return Fund: Class M | FSRTX           |
| C000048842 | Fidelity Advisor Strategic Real Return Fund: Class I | FSIRX           |
| C000205021 | Fidelity Advisor Strategic Real Return Fund: Class Z | FIQDX           |
| C000214978 | Class K6                                             | FSRKX           |

### Fidelity Strategic Dividend & Income Fund (Series ID: S000017681)

| Class ID   | Class Name                                                 | Ticker Symbol   |
|:---|:---|:---|
| C000048851 | Fidelity Strategic Dividend & Income Fund                  | FSDIX           |
| C000048852 | Fidelity Advisor Strategic Dividend & Income Fund: Class A | FASDX           |
| C000048854 | Fidelity Advisor Strategic Dividend & Income Fund: Class C | FCSDX           |
| C000048855 | Fidelity Advisor Strategic Dividend & Income Fund: Class M | FTSDX           |
| C000048856 | Fidelity Advisor Strategic Dividend & Income Fund: Class I | FSIDX           |
| C000205022 | Fidelity Advisor Strategic Dividend & Income Fund: Class Z | FIQWX           |

### Fidelity Series Investment Grade Bond Fund (Series ID: S000023604)

| Class ID   | Class Name                                 | Ticker Symbol   |
|:---|:---|:---|
| C000069436 | Fidelity Series Investment Grade Bond Fund | FSIGX           |

### Fidelity Conservative Income Bond Fund (Series ID: S000031520)

| Class ID   | Class Name                                              | Ticker Symbol   |
|:---|:---|:---|
| C000098000 | Fidelity Conservative Income Bond Fund                  | FCNVX           |
| C000243069 | Fidelity Advisor Conservative Income Bond Fund: Class Z | FCNYX           |
| C000243070 | Fidelity Advisor Conservative Income Bond Fund: Class A | FCNQX           |
| C000243071 | Fidelity Advisor Conservative Income Bond Fund: Class I | FCNWX           |

### Fidelity Series Short-Term Credit Fund (Series ID: S000048583)

| Class ID   | Class Name                             | Ticker Symbol   |
|:---|:---|:---|
| C000153158 | Fidelity Series Short-Term Credit Fund | FYBTX           |

### Fidelity Flex Conservative Income Bond Fund (Series ID: S000062001)

| Class ID   | Class Name                                  | Ticker Symbol   |
|:---|:---|:---|
| C000200823 | Fidelity Flex Conservative Income Bond Fund | FJTDX           |

### Fidelity SAI Total Bond Fund (Series ID: S000062237)

| Class ID   | Class Name                   | Ticker Symbol   |
|:---|:---|:---|
| C000201533 | Fidelity SAI Total Bond Fund | FSMTX           |

### Fidelity SAI Low Duration Bond Fund (Series ID: S000069440)

| Class ID   | Class Name                          | Ticker Symbol   |
|:---|:---|:---|
| C000221555 | Fidelity SAI Low Duration Bond Fund | FZOLX           |

### Fidelity SAI Short-Term Bond Fund (Series ID: S000069441)

| Class ID   | Class Name                        | Ticker Symbol   |
|:---|:---|:---|
| C000221556 | Fidelity SAI Short-Term Bond Fund | FZOMX           |

### Fidelity Tactical Bond Fund (Series ID: S000075287)

| Class ID   | Class Name                                   | Ticker Symbol   |
|:---|:---|:---|
| C000234189 | Fidelity Tactical Bond Fund                  | FBAGX           |
| C000234190 | Fidelity Advisor Tactical Bond Fund: Class Z | FBAPX           |
| C000234191 | Fidelity Advisor Tactical Bond Fund: Class A | FTKAX           |
| C000234192 | Fidelity Advisor Tactical Bond Fund: Class C | FTKCX           |
| C000234193 | Fidelity Advisor Tactical Bond Fund: Class M | FTYMX           |
| C000234194 | Fidelity Advisor Tactical Bond Fund: Class I | FBAHX           |

### Fidelity SAI Sustainable Core Plus Bond Fund (Series ID: S000075889)

| Class ID   | Class Name                                   | Ticker Symbol   |
|:---|:---|:---|
| C000235214 | Fidelity SAI Sustainable Core Plus Bond Fund | FIABX           |

### Fidelity SAI Sustainable Low Duration Bond Fund (Series ID: S000075890)

| Class ID   | Class Name                                      | Ticker Symbol   |
|:---|:---|:---|
| C000235215 | Fidelity SAI Sustainable Low Duration Bond Fund | FAPFX           |

### Fidelity Sustainable Core Plus Bond Fund (Series ID: S000075892)

| Class ID   | Class Name                               | Ticker Symbol   |
|:---|:---|:---|
| C000235217 | Fidelity Sustainable Core Plus Bond Fund | FIAEX           |

### 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           |

### Fidelity Series Sustainable Investment Grade Bond Fund (Series ID: S000080313)

| Class ID   | Class Name                                             | Ticker Symbol   |
|:---|:---|:---|
| C000242612 | Fidelity Series Sustainable Investment Grade Bond Fund | FIGDX           |

**Supplement to the Fidelity® Series Investment Grade Bond Fund October 30, 2025 Prospectus**

*It is expected that Mr. O'Neil will transition off the fund effective on or about September 30, 2026. Julian Potenza will become a Co-Portfolio Manager for the fund effective April 1, 2026.*

Effective April 1, 2026, the following information supplements information found in the "Fund Summary" section under the "Portfolio Manager(s)" heading.

Julian Potenza (Co-Portfolio Manager) has managed the fund since 2026.

Effective April 1, 2026, the following information supplements the biographical information found in the "Fund Management" section under the "Portfolio Manager(s)" heading.

Julian Potenza is Co-Portfolio Manager of Fidelity® Series Investment Grade Bond Fund, which he has managed since 2026. He also manages other funds. Since joining Fidelity Investments in 2007, Mr. Potenza has worked as a research analyst and portfolio manager.

LIG-PSTK-1225-105 1.899738.105 December 12, 2025

**Supplement to the Fidelity® Strategic Real Return Fund November 29, 2025 Prospectus**

*It is expected that Mr. O'Neil will transition off the fund effective on or about September 30, 2026. Rick Gandhi will become a Co-Lead Portfolio Manager for the fund effective January 1, 2026.*

Effective January 1, 2026, the following information supplements information found in the "Fund Summary" section under the "Portfolio Manager(s)" heading.

Rick Gandhi (Co-Lead Portfolio Manager) has managed the fund since 2026.

Effective January 1, 2026, the following information supplements the biographical information found in the "Fund Management" section under the "Portfolio Manager(s)" heading.

Rick Gandhi is Co-Lead Portfolio Manager of Fidelity® Strategic Real Return Fund, which he has managed since 2026. He also manages other funds. Since joining Fidelity Investments in 2009, Mr. Gandhi has worked as a research analyst and portfolio manager.

RRS-PSTK-1225-132 1.820982.132 December 12, 2025

**Supplement to the Fidelity® SAI Sustainable Core Plus Bond Fund October 30, 2025 Prospectus**

*It is expected that Mr. O'Neil will transition off the fund effective on or about September 30, 2026. Julian Potenza will become a Co-Portfolio Manager for the fund effective April 1, 2026.*

Effective April 1, 2026, the following information supplements information found in the "Fund Summary" section under the "Portfolio Manager(s)" heading.

Julian Potenza (Co-Portfolio Manager) has managed the fund since 2026.

Effective April 1, 2026, the following information supplements the biographical information found in the "Fund Management" section under the "Portfolio Manager(s)" heading.

Julian Potenza is Co-Portfolio Manager of Fidelity® SAI Sustainable Core Plus Bond Fund, which he has managed since 2026. He also manages other funds. Since joining Fidelity Investments in 2007, Mr. Potenza has worked as a research analyst and portfolio manager.

SSU-PSTK-1225-101 1.9911693.101 December 12, 2025

**Supplement to the Fidelity® SAI Total Bond Fund October 30, 2025 Prospectus**

*It is expected that Mr. O'Neil will transition off the fund effective on or about September 30, 2026. Julian Potenza will become a Co-Portfolio Manager for the fund effective April 1, 2026.*

Effective April 1, 2026, the following information supplements information found in the "Fund Summary" section under the "Portfolio Manager(s)" heading.

Julian Potenza (Co-Portfolio Manager) has managed the fund since 2026.

Effective April 1, 2026, the following information supplements the biographical information found in the "Fund Management" section under the "Portfolio Manager(s)" heading.

Julian Potenza is Co-Portfolio Manager of Fidelity® SAI Total Bond Fund, which he has managed since 2026. He also manages other funds. Since joining Fidelity Investments in 2007, Mr. Potenza has worked as a research analyst and portfolio manager.

STB-PSTK-1225-103 1.9910131.103 December 12, 2025

**Supplement to the Fidelity® Sustainable Core Plus Bond Fund October 30, 2025 Prospectus**

*It is expected that Mr. O'Neil will transition off the fund effective on or about September 30, 2026. Julian Potenza will become a Co-Portfolio Manager for the fund effective April 1, 2026.*

Effective April 1, 2026, the following information supplements information found in the "Fund Summary" section under the "Portfolio Manager(s)" heading.

Julian Potenza (Co-Portfolio Manager) has managed the fund since 2026.

Effective April 1, 2026, the following information supplements the biographical information found in the "Fund Management" section under the "Portfolio Manager(s)" heading.

Julian Potenza is Co-Portfolio Manager of Fidelity® Sustainable Core Plus Bond Fund, which he has managed since 2026. He also manages other funds. Since joining Fidelity Investments in 2007, Mr. Potenza has worked as a research analyst and portfolio manager.

SCB-PSTK-1225-100 1.9921950.100 December 12, 2025

**Supplement to the Fidelity® Series Sustainable Investment Grade Bond Fund October 30, 2025 Prospectus**

*It is expected that Mr. O'Neil will transition off the fund effective on or about September 30, 2026. Julian Potenza will become a Co-Portfolio Manager for the fund effective April 1, 2026.*

Effective April 1, 2026, the following information supplements information found in the "Fund Summary" section under the "Portfolio Manager(s)" heading.

Julian Potenza (Co-Portfolio Manager) has managed the fund since 2026.

Effective April 1, 2026, the following information supplements the biographical information found in the "Fund Management" section under the "Portfolio Manager(s)" heading.

Julian Potenza is Co-Portfolio Manager of Fidelity® Series Sustainable Investment Grade Bond Fund, which he has managed since 2026. He also manages other funds. Since joining Fidelity Investments in 2007, Mr. Potenza has worked as a research analyst and portfolio manager.

SGB-PSTK-1225-100 1.9921953.100 December 12, 2025

**Supplement to the Fidelity® Strategic Dividend & Income® Fund January 29, 2025 Prospectus**

*It is expected that Mr. O'Neil will transition off the fund effective on or about September 30, 2026. Rick Gandhi will become a Co-Lead Portfolio Manager for the fund effective January 1, 2026.* 

Effective January 1, 2026, the following information replaces similar information found in the "Fund Summary" section under the "Portfolio Manager(s)" heading.

Rick Gandhi (Co-Lead Portfolio Manager) has managed the fund since 2024.

Effective January 1, 2026, the following information replaces similar biographical information found in the "Fund Management" section under the "Portfolio Manager(s)" heading.

Rick Gandhi is Co-Lead Portfolio Manager of Fidelity® Strategic Dividend & Income® Fund, which he has managed since 2024. He also manages other funds. Since joining Fidelity Investments in 2009, Mr. Gandhi has worked as a research analyst and portfolio manager.

SDI-PSTK-1225-125 1.791404.125 December 12, 2025

**Supplement to the Fidelity® Conservative Income Bond Fund Class A, Class I, and Class Z October 30, 2025 Prospectus**

*Effective on or about March 31, 2026, Julian Potenza will no longer serve as Co-Portfolio Manager of the fund.*

AFCV-PSTK-1225-103 1.9911293.103 December 12, 2025

**Supplement to the Fidelity® Sustainable Low Duration Bond Fund Class A, Class M, Class C, Class I, and Class Z October 30, 2025 Prospectus**

*Effective on or about March 31, 2026, Julian Potenza will no longer serve as Co-Portfolio Manager of the fund.*

ASLD-PSTK-1225-102 1.9909559.102 December 12, 2025

**Supplement to the Fidelity® Short-Term Bond Fund Class A, Class M, Class C, Class I, and Class Z October 30, 2025 Prospectus**

*Effective on or about March 31, 2026, Julian Potenza will no longer serve as Co-Portfolio Manager of the fund.*

ASTP-PSTK-1225-113 1.9881435.113 December 12, 2025

**Supplement to the Fidelity® Conservative Income Bond Fund October 30, 2025 Prospectus**

*Effective on or about March 31, 2026, Julian Potenza will no longer serve as Co-Portfolio Manager of the fund.*

FCV-I-PSTK-1225-106 1.9585864.106 December 12, 2025

**Supplement to the Fidelity® Intermediate Bond Fund October 30, 2025 Prospectus**

*Effective on or about March 31, 2026, Julian Potenza will no longer serve as Co-Portfolio Manager of the fund.*

IBF-PSTK-1225-119 1.479312.119 December 12, 2025

**Supplement to the Fidelity® Sustainable Low Duration Bond Fund October 30, 2025 Prospectus**

*Effective on or about March 31, 2026, Julian Potenza will no longer serve as Co-Portfolio Manager of the fund.*

SLD-PSTK-1225-101 1.9909567.101 December 12, 2025

**Supplement to the Fidelity® SAI Sustainable Low Duration Bond Fund October 30, 2025 Prospectus**

*Effective on or about March 31, 2026, Julian Potenza will no longer serve as Co-Portfolio Manager of the fund.*

SLO-PSTK-1225-100 1.9921956.100 December 12, 2025

**Supplement to the Fidelity® Series Short-Term Credit Fund October 30, 2025 Prospectus**

*Effective on or about March 31, 2026, Julian Potenza will no longer serve as Co-Portfolio Manager of the fund.*

SS1-PSTK-1225-101 1.9883850.101 December 12, 2025

**Supplement to the Fidelity® SAI Low Duration Bond Fund and Fidelity® SAI Short-Term Bond Fund October 30, 2025 Prospectus**

*Effective on or about March 31, 2026, Julian Potenza will no longer serve as Co-Portfolio Manager of each fund.*

SST-LDI-PSTK-1225-100 1.9921960.100 December 12, 2025

**Supplement to the Fidelity® Short-Term Bond Fund October 30, 2025 Prospectus**

*Effective on or about March 31, 2026, Julian Potenza will no longer serve as Co-Portfolio Manager of the fund.*

STP-PSTK-1225-117 1.790645.117 December 12, 2025

**Supplement to the Fidelity Flex® Funds Fidelity Flex® Conservative Income Bond Fund October 30, 2025 Prospectus**

*Effective on or about March 31, 2026, Julian Potenza will no longer serve as Co-Portfolio Manager of the fund.*

ZCI-PSTK-1225-101 1.9911289.101 December 12, 2025

**Supplement to the Fidelity® Strategic Real Return Fund Class A, Class M, Class C, Class I, and Class Z November 29, 2025 Prospectus**

*It is expected that Mr. O'Neil will transition off the fund effective on or about September 30, 2026. Rick Gandhi will become a Co-Lead Portfolio Manager for the fund effective January 1, 2026.*

Effective January 1, 2026, the following information supplements information found in the "Fund Summary" section under the "Portfolio Manager(s)" heading.

Rick Gandhi (Co-Lead Portfolio Manager) has managed the fund since 2026.

Effective January 1, 2026, the following information supplements the biographical information found in the "Fund Management" section under the "Portfolio Manager(s)" heading.

Rick Gandhi is Co-Lead Portfolio Manager of Fidelity® Strategic Real Return Fund, which he has managed since 2026. He also manages other funds. Since joining Fidelity Investments in 2009, Mr. Gandhi has worked as a research analyst and portfolio manager.

ARRS-PSTK-1225-147 1.820981.147 December 12, 2025

**Supplement to the Fidelity® Strategic Dividend & Income® Fund Class A, Class M, Class C, Class I, and Class Z January 29, 2025 Prospectus**

*It is expected that Mr. O'Neil will transition off the fund effective on or about September 30, 2026. Rick Gandhi will become a Co-Lead Portfolio Manager for the fund effective January 1, 2026.* 

Effective January 1, 2026, the following information replaces similar information found in the "Fund Summary" section under the "Portfolio Manager(s)" heading.

Rick Gandhi (Co-Lead Portfolio Manager) has managed the fund since 2024.

Effective January 1, 2026, the following information replaces similar biographical information found in the "Fund Management" section under the "Portfolio Manager(s)" heading.

Rick Gandhi is Co-Lead Portfolio Manager of Fidelity® Strategic Dividend & Income® Fund, which he has managed since 2024. He also manages other funds. Since joining Fidelity Investments in 2009, Mr. Gandhi has worked as a research analyst and portfolio manager.

ASDI-PSTK-1225-138 1.805077.138 December 12, 2025

**Supplement to the Fidelity® Strategic Real Return Fund Class K6 November 29, 2025 Prospectus**

*It is expected that Mr. O'Neil will transition off the fund effective on or about September 30, 2026. Rick Gandhi will become a Co-Lead Portfolio Manager for the fund effective January 1, 2026.*

Effective January 1, 2026, the following information supplements information found in the "Fund Summary" section under the "Portfolio Manager(s)" heading.

Rick Gandhi (Co-Lead Portfolio Manager) has managed the fund since 2026.

Effective January 1, 2026, the following information supplements the biographical information found in the "Fund Management" section under the "Portfolio Manager(s)" heading.

Rick Gandhi is Co-Lead Portfolio Manager of Fidelity® Strategic Real Return Fund, which he has managed since 2026. He also manages other funds. Since joining Fidelity Investments in 2009, Mr. Gandhi has worked as a research analyst and portfolio manager.

RRS-K6-PSTK-1225-108 1.9900306.108 December 12, 2025

**Supplement to the Fidelity® Investment Grade Bond Fund Class A, Class M, Class C, Class I, and Class Z October 30, 2025 Prospectus**

Effective April 1, 2026, the following information supplements information found in the "Fund Summary" section under the "Portfolio Manager(s)" heading.

Julian Potenza (Co-Portfolio Manager) has managed the fund since 2026.

Effective April 1, 2026, the following information supplements the biographical information found in the "Fund Management" section under the "Portfolio Manager(s)" heading.

Julian Potenza is Co-Portfolio Manager of Fidelity® Investment Grade Bond Fund, which he has managed since 2026. He also manages other funds. Since joining Fidelity Investments in 2007, Mr. Potenza has worked as a research analyst and portfolio manager.

AIGB-PSTK-1225-140 1.777602.140 December 12, 2025

**Supplement to the Fidelity® Tactical Bond Fund Class A, Class M, Class C, Class I, and Class Z October 30, 2025 Prospectus**

Effective April 1, 2026, the following information supplements information found in the "Fund Summary" section under the "Portfolio Manager(s)" heading.

Julian Potenza (Co-Portfolio Manager) has managed the fund since 2026.

Effective April 1, 2026, the following information supplements the biographical information found in the "Fund Management" section under the "Portfolio Manager(s)" heading.

Julian Potenza is Co-Portfolio Manager of Fidelity® Tactical Bond Fund, which he has managed since 2026. He also manages other funds. Since joining Fidelity Investments in 2007, Mr. Potenza has worked as a research analyst and portfolio manager.

ATBF-PSTK-1225-103 1.9911342.103 December 12, 2025

**Supplement to the Fidelity® Investment Grade Bond Fund October 30, 2025 Prospectus**

Effective April 1, 2026, the following information supplements information found in the "Fund Summary" section under the "Portfolio Manager(s)" heading.

Julian Potenza (Co-Portfolio Manager) has managed the fund since 2026.

Effective April 1, 2026, the following information supplements the biographical information found in the "Fund Management" section under the "Portfolio Manager(s)" heading.

Julian Potenza is Co-Portfolio Manager of Fidelity® Investment Grade Bond Fund, which he has managed since 2026. He also manages other funds. Since joining Fidelity Investments in 2007, Mr. Potenza has worked as a research analyst and portfolio manager.

IGB-PSTK-1225-123 1.734043.123 December 12, 2025

**Supplement to the Fidelity® Tactical Bond Fund October 30, 2025 Prospectus**

Effective April 1, 2026, the following information supplements information found in the "Fund Summary" section under the "Portfolio Manager(s)" heading.

Julian Potenza (Co-Portfolio Manager) has managed the fund since 2026.

Effective April 1, 2026, the following information supplements the biographical information found in the "Fund Management" section under the "Portfolio Manager(s)" heading.

Julian Potenza is Co-Portfolio Manager of Fidelity® Tactical Bond Fund, which he has managed since 2026. He also manages other funds. Since joining Fidelity Investments in 2007, Mr. Potenza has worked as a research analyst and portfolio manager.

TBF-PSTK-1225-101 1.9911340.101 December 12, 2025