UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form 6-K

REPORT OF FOREIGN PRIVATE ISSUER

PURSUANT TO RULE 13a-16 OR 15d-16

UNDER THE SECURITIES EXCHANGE ACT OF 1934

For the month of: ~~September~~October 2025

Commission File Number: 001-35771

GRANITE REAL ESTATE INVESTMENT TRUST

(Name of registrant)

77 King Street West, Suite 4010, P.O. Box 159

Toronto-Dominion Centre

Toronto, Ontario

M5K 1H1

(Address of Principal Executive Office)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F:

Form 20-F ☐ Form 40-F ☑

DOCUMENTS FILED AS PART OF THIS FORM 6-K

See the Exhibit Index to this Form 6-K.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

Date: September 16, 2025	GRANITE REAL ESTATE INVESTMENT TRUST
Date: October 17, 2025	GRANITE REAL ESTATE INVESTMENT TRUST
	By:	/s/ Teresa Neto
		Name:	Teresa Neto
		Name: Teresa Neto
		Title:	Chief Financial Officer
		Title: Chief Financial Officer

FORM 6-K EXHIBIT INDEX

Exhibit No.

99.1 Granite REIT Declares Distribution for ~~September~~October 2025

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