Form 8-A12B Fidelity Merrimack Stree

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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-A

FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES

PURSUANT TO SECTION 12(b) OR (g) OF THE

SECURITIES EXCHANGE ACT OF 1934

Fidelity Merrimack Street Trust

______________________________________

(Exact name of registrant as specified in its charter)

Securities to be registered pursuant to Section 12(b) of the Act:

If this form relates to the registration of a class of securities pursuant to Section 12(b) of the Exchange Act and is effective pursuant to General Instruction A.(c) or (e), check the following box. [X]

If this form relates to the registration of a class of securities pursuant to Section 12(g) of the Exchange Act and is effective pursuant to General Instruction A.(d) or (e), check the following box. [ ]

If this form relates to the registration of a class of securities concurrently with Regulation A offering, check the following box. [ ]

Securities Act registration statement or Regulation A offering statement file number to which this form relates: 333-186372

Securities to be registered pursuant to Section 12(g) of the Act: None

 (Title of class)

INFORMATION REQUIRED IN REGISTRATION STATEMENT

Item 1. Description of Registrant’s Securities to be Registered.

A description of the Shares is set forth in Post-Effective Amendment No. 32 to the registrant’s Registration Statement on Form N-1A (“Registration Statement”) (Commission File Nos. 333-186372 and 811-22796), as filed with the Securities and Exchange Commission on December 26, 2024, which description is incorporated herein by reference. Any amendment or form of supplement to the Registration Statement that is subsequently filed that relates to the Fund is hereby also incorporated by reference herein.

Item 2. Exhibits.

(a)

Declaration of Trust, dated November 15, 2012, is incorporated herein by reference to Exhibit (a) of the initial Registration Statement.

(b)

Bylaws of the Trust, dated November 15, 2012, is incorporated herein by reference to Exhibit (b) of the initial Registration Statement.

SIGNATURE

Pursuant to the requirements of Section 12 of the Securities Exchange Act of 1934, the registrant has duly caused this Registration Statement to be signed on its behalf by the undersigned, thereto duly authorized, in the City of Boston, and the Commonwealth of Massachusetts, on the 26th day of December 2024.

Fidelity Merrimack Street Trust