Zentek (ZTEK) files Form 6-K on CRA 2019 tax reassessment notice

Rhea-AI Filing Summary

Zentek Ltd. filed a Form 6-K as a foreign private issuer, signed by its Chief Financial Officer, Wendy Ford. The filing notes that an exhibit is attached: a press release dated November 21, 2025, titled "Zentek Receives CRA Notice of Reassessment for 2019." This indicates the company has received a tax reassessment notice from the Canada Revenue Agency relating to its 2019 tax year, and is informing investors through the attached press release.

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

OF THE SECURITIES EXCHANGE ACT OF 1934

For the month of November 2025

Commission File Number: 001-41310

ZENTEK LTD.

(Registrant)

24 Corporate Court

Guelph, Ontario N1G 5G5 Canada

(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  ☒

Indicate by check mark if the Registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1):  ☐

Indicate by check mark if the Registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7):  ☐

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.

	ZENTEK LTD.
	(Registrant)
Date: November 21, 2025	By	/s/ Wendy Ford
		Wendy Ford
		Chief Financial Officer

EXHIBIT INDEX

Exhibit	Description of Exhibit
99.1	Press Release dated November 21, 2025 - Zentek Receives CRA Notice of Reassessment for 2019

FAQ

What did Zentek Ltd. (ZTEK) report in this Form 6-K?

Zentek Ltd. reported that it filed a Form 6-K containing a press release titled "Zentek Receives CRA Notice of Reassessment for 2019," signed by its Chief Financial Officer, Wendy Ford.

What is the key topic of Zentek Ltd.'s November 21, 2025 press release?

The key topic is that Zentek Ltd. received a Canada Revenue Agency (CRA) notice of reassessment for its 2019 tax year.

Who signed Zentek Ltd.'s November 2025 Form 6-K?

The Form 6-K was signed on behalf of Zentek Ltd. by Wendy Ford, the company’s Chief Financial Officer, dated November 21, 2025.

What exhibit is included with Zentek Ltd.'s November 2025 Form 6-K?

The exhibit included is Exhibit 99.1, described as a press release dated November 21, 2025 titled "Zentek Receives CRA Notice of Reassessment for 2019."

Does Zentek Ltd.'s Form 6-K mention the tax year covered by the CRA reassessment?

Yes. The exhibit description states that the CRA notice of reassessment relates to the 2019 tax year.