Gildan Activewear (NYSE: GIL) files Form 6-K with Second Supplemental Indenture

Rhea-AI Filing Summary

Gildan Activewear Inc. filed a Form 6-K as a foreign private issuer that reports under Form 40-F. The filing is signed by Corporate Secretary Isabelle Papillon. It primarily submits as Exhibit 99.1 a Second Supplemental Indenture dated December 1, 2025 with U.S. Bank Trust Company, National Association acting as trustee.

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, DC 20549

FORM 6-K

Report of Foreign Private Issuer

Pursuant to Rule 13a-16 or 15d-16 of

the Securities Exchange Act of 1934

For the month of: December 2025 Commission File Number: 1-14830

GILDAN ACTIVEWEAR INC.

(Translation of registrant’s name into English)

600 de Maisonneuve Boulevard West

33rd Floor

Montréal, Québec

Canada H3A 3J2

(Address of principal executive offices)

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 x

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.

	GILDAN ACTIVEWEAR INC.
Date: December 1, 2025	By:	/s/ Isabelle Papillon
		Name: Isabelle Papillon
		Title:   Corporate Secretary

EXHIBIT INDEX

Exhibit		Description of Exhibit
99.1		Second Supplemental Indenture, dated as of December 1, 2025, between Gildan Activewear Inc., the guarantors party thereto and U.S. Bank Trust Company, National Association, as Trustee

FAQ

What does Gildan Activewear Inc. (GIL) report in this Form 6-K?

Gildan Activewear Inc. files a Form 6-K as a foreign private issuer. The report mainly submits Exhibit 99.1, a Second Supplemental Indenture dated December 1, 2025, involving Gildan, certain guarantors, and U.S. Bank Trust Company, National Association as trustee.

Which type of annual report form does Gildan Activewear Inc. (GIL) use?

Gildan Activewear Inc. indicates it files annual reports under Form 40-F. This classification confirms it follows the Canadian-based reporting format for foreign private issuers rather than Form 20-F typically used by other non-U.S. companies.

Who signed the Gildan Activewear Inc. (GIL) Form 6-K filing?

The Form 6-K is signed on behalf of Gildan Activewear Inc. by Isabelle Papillon. She signs in her capacity as Corporate Secretary, confirming the company’s authorization of this specific submission to the U.S. Securities and Exchange Commission.

What is Exhibit 99.1 in Gildan Activewear Inc.’s (GIL) Form 6-K?

Exhibit 99.1 is described as a Second Supplemental Indenture dated December 1, 2025. It is between Gildan Activewear Inc., certain guarantors party to the agreement, and U.S. Bank Trust Company, National Association, which serves as the trustee under this supplemental indenture.

Where is Gildan Activewear Inc. (GIL) headquartered according to the Form 6-K?

Gildan Activewear Inc. lists its principal executive offices at 600 de Maisonneuve Boulevard West, 33rd Floor, Montréal, Québec, Canada H3A 3J2. This address places the company’s main corporate base in Montréal, within the province of Québec.