As filed with the Securities and Exchange Commission on September 4, 2026.

Registration No. 333-297336

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

AMENDMENT NO. 4

TO

FORM F-1
REGISTRATION STATEMENT
UNDER
THE SECURITIES ACT OF 1933

Chilwa Minerals Limited
(Exact name of registrant as specified in its charter)

Chilwa Minerals Limited

Level 28, 140 St George’s Terrace

Perth, WA 6005
Australia
+61 8 6189 4924
(Address, including zip code, and telephone number, including area code, of registrant’s principal executive offices)

Vcorp Services, LLC
25 Robert Pitt Drive, Suite 204
Monsey, New York 10952
Tel: +1 888 528 2677
(Name, address, including zip code, and telephone number, including area code, of agent for service)

Copies to:

Approximate date of commencement of proposed sale to the public: As soon as practicable after this Registration Statement becomes effective.

If any of the securities being registered on this Form are to be offered on a delayed or continuous basis pursuant to Rule 415 under the Securities Act, check the following box: ☐

If this Form is filed to register additional securities for an offering pursuant to Rule 462(b) under the Securities Act, please check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. ☐

If this Form is a post-effective amendment filed pursuant to Rule 462(c) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. ☐

If this Form is a post-effective amendment filed pursuant to Rule 462(d) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. ☐

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act.

Emerging growth company ☒

If an emerging growth company that prepares its financial statements in accordance with U.S. GAAP, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 7(a)(2)(B) of the Securities Act. ☐

The registrant hereby amends this registration statement on such date or dates as may be necessary to delay its effective date until the registrant shall file a further amendment which specifically states that this registration statement shall thereafter become effective in accordance with section 8(a) of the Securities Act of 1933 or until the registration statement shall become effective on such dates as the Commission, acting pursuant to said section 8(a), may determine.

EXPLANATORY NOTE

This Amendment No. 4 (this “Amendment”) to our Registration Statement on Form F-1 (File No. 333-297336), initially filed on July 23, 2026 (the “Registration Statement”), is being filed as an exhibits-only filing to file (i) an updated Form of Representative’s Warrant as Exhibit 4.3, (ii) an updated Form of Global Warrant to Purchase ADSs (included in Exhibit 4.5) as Exhibit 4.4 and (iii) an updated Form of ADS Warrant Agent Agreement between Chilwa Minerals Limited and Computershare Inc., as warrant agent as Exhibit 4.5. Accordingly, this Amendment consists only of the facing page, this explanatory note, Part II of the Registration Statement, including the signature page and the exhibit index and the filed exhibits. The remainder of the Registration Statement is unchanged and has been omitted from this Amendment.

PART II

INFORMATION NOT REQUIRED IN PROSPECTUS

ITEM 6. Indemnification of Directors and Officers.

Australian law. Australian law provides that a company or a related body corporate of a company may provide for indemnification of officers and directors, except to the extent of any of the following liabilities incurred as an officer or director of the company:

Constitution. Our Constitution provides that, except to the extent prohibited by the law and the Corporations Act and, to the extent that the officer is not otherwise indemnified by us pursuant to an indemnity, we indemnify every person who is or has been an officer of the Company against any liability or claim (other than legal costs that are unreasonable) incurred by that person as an officer. This includes any liability or claim incurred by that person in their capacity as an officer of a subsidiary of the Company where the Company requested that person to accept that appointment.

SEC Position. Insofar as indemnification for liabilities arising under the Securities Act may be permitted to directors, officers or persons controlling us pursuant to the foregoing provisions, we have been informed that in the opinion of the SEC such indemnification is against public policy as expressed in the Securities Act and is therefore unenforceable.

ITEM 7. Recent Sales of Unregistered Securities.

Since July 1, 2023, the following changes have been made to our ordinary share capital:

None of the foregoing transactions involved any underwriter, underwriting discounts or commissions, or any public offering. The recipients of the securities in each of these transactions represented their intentions to acquire the securities for investment only and not with a view to or for sale in connection with any distribution thereof, and appropriate legends were placed on the share certificates issued in these transactions. All recipients had adequate access, through their relationships with us, to information about us. The sales of these securities were made without any general solicitation or advertising.

ITEM 8. Exhibits and Financial Statement Schedules.

ITEM 9. Undertakings.

The undersigned Registrant hereby undertakes to provide to the underwriter at the closing specified in the underwriting agreement, certificates in such denominations and registered in such names as required by the underwriter to permit prompt delivery to each purchaser.

Insofar as indemnification for liabilities arising under the Securities Act may be permitted to directors, officers and controlling persons of the Registrant pursuant to the foregoing provisions, or otherwise, the Registrant has been advised that in the opinion of the Securities and Exchange Commission such indemnification is against public policy as expressed in the Securities Act and is, therefore, unenforceable. In the event that a claim for indemnification against such liabilities (other than the payment by the Registrant of expenses incurred or paid by a director, officer or controlling person of the Registrant in the successful defense of any action, suit or proceeding) is asserted by such director, officer or controlling person in connection with the securities being registered, the Registrant will, unless in the opinion of its counsel the matter has been settled by controlling precedent, submit to a court of appropriate jurisdiction the question whether such indemnification by it is against public policy as expressed in the Securities Act and will be governed by the final adjudication of such issue.

The undersigned Registrant hereby undertakes that:

SIGNATURES

Pursuant to the requirements of the Securities Act of 1933, as amended, the registrant certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form F-1 and has duly caused this registration statement to be signed on its behalf by the undersigned, thereunto duly authorized in Perth, Australia on September 4, 2026.

Pursuant to the requirements of the Securities Act of 1933, as amended, this Amendment No. 4 to the registration statement has been signed by the following persons on behalf of the registrant and in the capacities and on the dates indicated:

Signature of Authorized U.S. Representative of the Registrant

Pursuant to the requirements of the Securities Act of 1933, as amended, the undersigned, the duly authorized representative in the United States of Chilwa Minerals Limited, has signed this Amendment No. 4 to the Registration Statement on September 4, 2026.