Zentek amends filing to add Albany Graphite PEA

Zentek Ltd. filed an amended foreign issuer report to change how a prior disclosure is used in its U.S. registration materials.

Rhea-AI Filing Summary

Zentek Ltd. filed an amended foreign issuer report to change how a prior disclosure is used in its U.S. registration materials. Amendment No. 1 to the August 10, 2026 Form 6-K now formally incorporates Exhibit 99.1 into Zentek’s shelf Registration Statement on Form F-3 (File No. 333-278886). Exhibit 99.1 is a press release titled “Zentek Announces New PEA for Albany Graphite: US$3.85 billion after-tax NPV at a 5% discount rate, 27.4% after-tax IRR, on an acid-free route to 99.9992% purity graphite.” The amendment states there are no other changes to the original report, and it clarifies that the exhibit is deemed part of the Form F-3 from the date the initial report was furnished, unless later superseded.

Key Figures

After-tax NPV: US$3.85 billion Discount rate: 5% After-tax IRR: 27.4% +2 more

5 metrics

After-tax NPV US$3.85 billion After-tax NPV at a 5% discount rate for Albany Graphite PEA

Discount rate 5% Discount rate used to calculate after-tax NPV in PEA headline

After-tax IRR 27.4% After-tax internal rate of return cited for Albany Graphite PEA

Graphite purity 99.9992% Purity of graphite referenced with acid-free route in PEA headline

Form F-3 file number 333-278886 Registration statement into which Exhibit 99.1 is incorporated

Key Terms

PEA, after-tax NPV, After-Tax IRR, Form F-3, +1 more

5 terms

PEA financial

"Zentek Announces New PEA for Albany Graphite: US$3.85 Billion After-Tax NPV"

after-tax NPV financial

"US$3.85 Billion After-Tax NPV at a 5% Discount Rate"

After-tax NPV is the calculation that converts a series of future cash flows into a single present-day value after subtracting the taxes those cash flows will incur. It tells investors whether an investment or project is expected to add value once taxes and the time value of money are taken into account—like comparing the worth today of several future paychecks after the taxman takes his cut. This helps compare options on a common basis and decide which opportunities are likely to increase shareholder value.

After-Tax IRR financial

"27.4% After-Tax IRR, on an Acid-Free Route"

After-tax IRR is the annualized percentage return of an investment after accounting for the taxes paid on its cash flows and gains. It shows the real, take-home rate of return—like comparing net pay to gross salary—so investors can compare opportunities on an equal, realistic basis and decide which investments keep them more money after taxes.

Form F-3 regulatory

"Registration Statement on Form F-3 (File No. 333-278886)"

Form F-3 is a U.S. securities filing that lets eligible foreign companies pre-register and then quickly sell shares or other securities to raise money, because they already meet ongoing reporting and size tests. For investors it signals that the company is up-to-date with regulatory disclosure and has an efficient way to issue new securities — similar to a pre-approved credit line — which can mean faster capital raises but also potential dilution of existing holdings.

incorporated by reference regulatory

"included with this Amendment No. 1 is hereby incorporated by reference"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What does Zentek Ltd. (ZTEK) change with this Form 6-K/A?

Zentek Ltd. uses this Form 6-K/A to incorporate Exhibit 99.1, a press release about a new PEA for Albany Graphite, into its Form F-3 registration statement (File No. 333-278886) without altering other parts of the prior report.

How is the Albany Graphite PEA used in Zentek (ZTEK)’s Form F-3?

The Albany Graphite PEA press release, filed as Exhibit 99.1, is now specifically incorporated by reference into Zentek’s Form F-3 shelf registration and is deemed part of that registration from the date the initial report was furnished.

What key economics did Zentek (ZTEK) highlight for Albany Graphite?

The PEA press release headline cites an after-tax NPV of US$3.85 billion at a 5% discount rate and an after-tax IRR of 27.4%, based on an acid-free route to 99.9992% purity graphite.

Does this Zentek (ZTEK) amendment change any prior financial disclosures?

The amendment states that, except for incorporating Exhibit 99.1 into the Form F-3 registration, there are no other changes to the original August 10, 2026 Form 6-K report.

Who signed Zentek (ZTEK)’s Form 6-K/A and in what capacity?

The Form 6-K/A is signed on behalf of Zentek Ltd. by Wendy Ford, who is identified as the company’s Chief Financial Officer, dated August 12, 2026.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 08/12/2026 - 09:38 AM EDT Learn about SEC filing dates

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K/A

REPORT OF FOREIGN PRIVATE ISSUER

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

OF THE SECURITIES EXCHANGE ACT OF 1934

For the month of August 2026

Commission File Number: 001-41310

ZENTEK LTD.

(Registrant)

1123 York Road

Guelph, Ontario N1E 6Z1 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  ☒

EXPLANATORY NOTE

This Amendment No. 1 (this "Amendment No. 1") to the report on Form 6-K originally furnished with the U.S. Securities and Exchange Commission on August 10, 2026, Accession Number 0001062993-26-004121 (the "Initial Report"), is being filed in order to incorporate Exhibit 99.1 filed as part of the Initial Report into the Registrant's Registration Statement on Form F-3 (File No. 333-278886). Except as set forth herein, there are no other changes to the Initial Report.

DOCUMENTS INCORPORATED BY REFERENCE

Exhibit 99.1 included with this Amendment No. 1 is hereby incorporated by reference into the Registrant's Registration Statement on Form F-3 (File No. 333-278886) and shall be deemed to be a part thereof from the date on which the Initial Report was furnished, to the extent not superseded by documents or reports subsequently filed or furnished.

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: August 12, 2026	By	/s/ Wendy Ford
		Wendy Ford
		Chief Financial Officer

EXHIBIT INDEX

Exhibit		Description of Exhibit
99.1		Press Release dated August 10, 2026 - Zentek Announces New PEA for Albany Graphite: US$3.85 Billion After-Tax NPV at a 5% Discount Rate, 27.4% After-Tax IRR, on an Acid-Free Route to 99.9992% Purity Graphite (incorporated by reference to Exhibit 99.1 to the Form 6-K, Accession Number 0001062993-26-004121)