Business acquisition report detailed in Gildan Activewear (GIL) Form 6-K filing

Rhea-AI Filing Summary

Gildan Activewear Inc. submitted a Form 6-K as a foreign private issuer, signed by its Corporate Secretary, Isabelle Papillon. The filing includes a Business Acquisition Report as Exhibit 99.1, dated December 15, 2025, indicating the company has completed or reported on a business acquisition.

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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.

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(Translation of registrant’s name into English)

600 de Maisonneuve Boulevard West
33rd Floor
Montréal, Québec
Canada H3A 3J2

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(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 ☒

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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 15, 2025	​	​	By:	​	​	/s/ Isabelle Papillon ​ Name: Isabelle Papillon Title:  Corporate Secretary	​

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EXHIBIT INDEX

Exhibit	​	​	Description of Exhibit	​
99.1	​	​	Business Acquisition Report, dated December 15, 2025	​

FAQ

What did Gildan Activewear Inc. (GIL) file in this Form 6-K?

Gildan Activewear Inc. filed a Form 6-K as a foreign private issuer. The submission primarily serves to provide a Business Acquisition Report as Exhibit 99.1, dated December 15, 2025, to U.S. investors and regulators.

What key exhibit is included in Gildan Activewear’s (GIL) Form 6-K?

The Form 6-K includes Exhibit 99.1, a Business Acquisition Report dated December 15, 2025. This exhibit contains detailed information about a business acquisition involving Gildan Activewear Inc., although the specific transaction details are not shown here.

Who signed Gildan Activewear’s (GIL) Form 6-K submission?

The Form 6-K was signed on behalf of Gildan Activewear Inc. by Isabelle Papillon. She is identified in the document as the company’s Corporate Secretary, acting as a duly authorized signatory for this regulatory filing.

When was Gildan Activewear’s (GIL) Form 6-K dated and signed?

The Form 6-K is dated December 15, 2025. On that date, Corporate Secretary Isabelle Papillon signed the report on behalf of Gildan Activewear Inc., formally submitting it under the Securities Exchange Act of 1934.

What type of issuer is Gildan Activewear Inc. (GIL) in this filing?

Gildan Activewear Inc. is identified as a foreign private issuer in this Form 6-K. The company indicates that it files or will file its annual reports under cover of Form 20-F, consistent with foreign issuer reporting standards.

What address is listed for Gildan Activewear Inc. (GIL) in the Form 6-K?

The filing lists Gildan Activewear Inc.’s principal executive offices at 600 de Maisonneuve Boulevard West, 33rd Floor, Montréal, Québec, Canada H3A 3J2. This location is presented as the company’s main corporate headquarters address.