# EDGAR Filing Document

**Accession Number:** 0001562565
**File Stem:** 0001562565-23-000008
**Filing Date:** 2023-3
**Character Count:** 4576
**Document Hash:** 37394a0804fc44419d2aa1fff181b751
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001562565-23-000008.hdr.sgml**: 20230331

**ACCESSION NUMBER**: 0001562565-23-000008

**CONFORMED SUBMISSION TYPE**: 497

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20230331

**DATE AS OF CHANGE**: 20230331

**EFFECTIVENESS DATE**: 20230331

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Fidelity Merrimack Street Trust
- **CENTRAL INDEX KEY:** 0001562565
- **IRS NUMBER:** 000000000
- **STATE OF INCORPORATION:** MA
- **FISCAL YEAR END:** 0831

**FILING VALUES:**
- **FORM TYPE:** 497
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 333-186372
- **FILM NUMBER:** 23786872

**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

## Series and Classes Contracts Data

### Fidelity Corporate Bond ETF (Series ID: S000040431)

---

|  |  |  |
|:---|:---|:---|
| Class Name                  | Ticker Symbol | Class ID   |
| Fidelity Corporate Bond ETF | FCOR          | C000125598 |

---

### Fidelity Total Bond ETF (Series ID: S000042567)

---

|  |  |  |
|:---|:---|:---|
| Class Name              | Ticker Symbol | Class ID   |
| Fidelity Total Bond ETF | FBND          | C000131659 |

---

### Fidelity Limited Term Bond ETF (Series ID: S000042569)

---

|  |  |  |
|:---|:---|:---|
| Class Name                     | Ticker Symbol | Class ID   |
| Fidelity Limited Term Bond ETF | FLTB          | C000131661 |

---

### Fidelity Investment Grade Bond ETF (Series ID: S000071131)

---

|  |  |  |
|:---|:---|:---|
| Class Name                         | Ticker Symbol | Class ID   |
| Fidelity Investment Grade Bond ETF | FIGB          | C000225826 |

---

### Fidelity Investment Grade Securitized ETF (Series ID: S000071132)

---

|  |  |  |
|:---|:---|:---|
| Class Name                                | Ticker Symbol | Class ID   |
| Fidelity Investment Grade Securitized ETF | FSEC          | C000225827 |

---

## Series and Classes Contracts Data

### Fidelity Corporate Bond ETF (Series ID: S000040431)

| Class ID   | Class Name                  | Ticker Symbol   |
|:---|:---|:---|
| C000125598 | Fidelity Corporate Bond ETF | FCOR            |

### Fidelity Total Bond ETF (Series ID: S000042567)

| Class ID   | Class Name              | Ticker Symbol   |
|:---|:---|:---|
| C000131659 | Fidelity Total Bond ETF | FBND            |

### Fidelity Limited Term Bond ETF (Series ID: S000042569)

| Class ID   | Class Name                     | Ticker Symbol   |
|:---|:---|:---|
| C000131661 | Fidelity Limited Term Bond ETF | FLTB            |

### Fidelity Investment Grade Bond ETF (Series ID: S000071131)

| Class ID   | Class Name                         | Ticker Symbol   |
|:---|:---|:---|
| C000225826 | Fidelity Investment Grade Bond ETF | FIGB            |

### Fidelity Investment Grade Securitized ETF (Series ID: S000071132)

| Class ID   | Class Name                                | Ticker Symbol   |
|:---|:---|:---|
| C000225827 | Fidelity Investment Grade Securitized ETF | FSEC            |

**Supplement to the**

**Fidelity® Corporate Bond ETF, Fidelity® Investment Grade Bond ETF, Fidelity® Investment Grade Securitized ETF, Fidelity® Limited Term Bond ETF, and Fidelity® Total Bond ETF** 

**December 30, 2022**

**Prospectus**

Effective April 1, 2023, FMR reduced Fidelity® Limited Term Bond ETF's management fee. The following information replaces similar information for Fidelity® Limited Term Bond ETF 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> | 0.25% |
| Distribution and/or Service (12b-1) fees |  |
| Other expenses | 0.00% |
| **Total annual operating expenses** | 0.25% |

---

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

---

| | |
|:---|:---|
| 1 year | $26 |
| 3 years | $80 |
| 5 years | $141 |
| 10 years | $318 |

---

The following information replaces similar information for Fidelity® Limited Term Bond ETF found in the "Fund Services" section under the "Advisory Fee(s)" heading.

The annual management fee rate, as a percentage of the fund's average net assets, is shown in the following table:

---

| | |
|:---|:---|
| **Fund** | **Management Fee Rate** |
| Fidelity® Limited Term Bond ETF | 0.25% |

---

FIXETF-PSTK-0423-104 1.9887760.104 April 1, 2023