Filed Pursuant to Rule 424(b)(3)

Registration No. 333-288328

PROSPECTUS SUPPLEMENT NO. 3

(to Prospectus dated April 7, 2026)

NAMIB MINERALS

PROSPECTUS FOR
Up to 87,548,686 Ordinary Shares

Up to 18,576,712 Ordinary Shares Issuable Upon Exercise of Warrants

Up to 7,212,394 Warrants to Purchase Ordinary Shares

This Prospectus Supplement No. 3 (this “Supplement”) updates and supplements the prospectus dated April 7, 2026 (the “Prospectus”), which forms a part of our Registration Statement on Form F-1 (File No. 333-288328) (as amended, the “Registration Statement”), related to (i) the offer and resale from time to time by the Selling Securityholders of up to (a) 87,548,686 Ordinary Shares (including 7,212,394 Ordinary Shares issuable upon the exercise of the Sponsor Warrants), and (b) 7,212,394 Sponsor Warrants, and (ii) the issuance by us of up to 18,576,712 Ordinary Shares upon exercise of the Warrants. Capitalized terms used in this Supplement and not otherwise defined herein have the respective meanings ascribed to them in the Prospectus.

The purpose of this Supplement is to update and supplement the information included in the Prospectus with the information contained in our Report on Form 6-K which was furnished to the U.S. Securities and Exchange Commission (the “SEC”) on July 17, 2026 and is included immediately following the cover page of this Supplement. This Supplement is not complete without, and may not be utilized except in connection with, the Prospectus, including any supplements and amendments thereto.

We may further amend or supplement the Prospectus and information in this Supplement from time to time by filing amendments to the Registration Statement or other supplements to the Prospectus, as required. You should read the entire Prospectus, this Supplement, any amendments to the Registration Statement, or subsequent supplements to the Prospectus (to the extent information therein is not superseded by more up to date information in subsequent supplements or amendments to the Prospectus) carefully before you make your investment decision.

Our Ordinary Shares are listed on the Nasdaq Global Market under the symbol “NAMM,” and our Warrants are listed on the Nasdaq Capital Market under the symbol “NAMMW.” On July 16, 2026, the closing trading prices of our Ordinary Shares and Warrants were $1.42 and $0.20, respectively.

INVESTING IN OUR SECURITIES INVOLVES A HIGH DEGREE OF RISK. YOU SHOULD CAREFULLY CONSIDER THE MATTERS DISCUSSED UNDER “RISK FACTORS” BEGINNING ON PAGE 8 OF THE PROSPECTUS.

NEITHER THE U.S. SECURITIES AND EXCHANGE COMMISSION NOR ANY STATE SECURITIES COMMISSION HAS APPROVED OR DISAPPROVED OF THESE SECURITIES OR DETERMINED IF THE PROSPECTUS, AS SUPPLEMENTED BY THIS SUPPLEMENT, IS TRUTHFUL OR COMPLETE. ANY REPRESENTATION TO THE CONTRARY IS A CRIMINAL OFFENSE.

The date of this Supplement is July 17, 2026.

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

UNDER THE SECURITIES EXCHANGE ACT OF 1934

For the month of June 2026

Commission File Number 001-42685

Namib Minerals

(Translation of registrant’s name into English)

Suite 210, 2nd Floor, Windward III

Regatta Office Park, PO Box 500

Grand Cayman, Cayman Islands, KY1-1106

(Address of principal executive office)

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 ☐

INFORMATION CONTAINED IN THIS FORM 6-K REPORT

EcoBank Term Loan Facility

On June 5, 2026, Bulawayo Mining Company (Private) Limited (the “How Mining Company”), a wholly owned subsidiary of Namib Minerals (the “Company”), entered into a Facility Agreement (the “Facility Agreement”) with Ecobank Zimbabwe Limited (“Ecobank”) for the creation of a new term-loan facility for an aggregate amount of $5.0 million (Five Million Dollars) (the “Term Loan Facility”). The Term Loan Facility has a term of thirty-six (36) months and expires on May 31, 2029. The Term Loan Facility will carry a base lending rate of 12% per annum minus a margin of 1% per annum and is subject to an acceptance fee of 1% of the total facility amount and a drawdown fee of 0.5% of the amount drawn down. The purpose of the Term Loan Facility is to finance mining development including hoist, expansion and maintenance of a milling plant and drilling equipment.

In connection with the Term Loan Facility and pursuant to the Facility Agreement, How Mining Company has entered into (i) a Security Agreement dated June 23, 2026, creating a security interest valued at $7.5 million in favor of Ecobank over certain plant and machinery owned and to be owned by How Mining Company, and (ii) a tripartite assignment agreement with Fidelity Gold Refinery (Private) Limited (“Fidelity”) and Ecobank, dated June 23, 2026, providing for the assignment and routing of at least $3,000,000 (Three Million Dollars) monthly from gold-sales to Fidelity through How Mining Company’s account held at Ecobank and creation of a lien upon certain proceeds or receivables due from Fidelity to How Mining Company in favor of Ecobank.

The Facility Agreement contains customary restrictive covenants applicable to How Mining Company and requires Ecobank’s prior consent for certain actions, including the incurrence of additional indebtedness, the acquisition of businesses, assets, or equity interests in third parties, and the repayment of shareholder loans or redemption of share capital.

The foregoing description of the Facility Agreement does not purport to be complete and is qualified in its entirety by reference to the Facility Agreement, copy of which is furnished as Exhibit 10.1 to this Report.

EXHIBIT INDEX

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.

Date: July 17, 2026

Exhibit 10.1

05 June 2026
EZWCIB2026/06/07
The Directors
Bulawayo Mining Company (Private) t/a How Mine
P.O Box 2259
Bulawayo
Zimbabwe

ATTENTION: Mr. Tavepi Dafana

Dear Sirs,

We are pleased to advise that Ecobank Zimbabwe Limited has approved your request for financing.

The facility is being granted under the following terms and conditions.

Board of Directors: P. Ncube (Chairman), T. Bere, G. Bwanya, C. Chipfumbu - Kangara, E. Rabvukwa, J. Anan-Ankomah (R. Fordwuo - Alternate), M. Svova, J. Shumbanhete (Finance Director), M. Kurenjekwa (Managing Director)

This security shall be supported by the following:

The Bank may, in the event of default and notwithstanding any settlement of account or other matter whatsoever, combine or consolidate all or any of the existing and future accounts of the Borrower with the Bank, including accounts in the name of the Bank whether current, deposit, loan or of any other nature whatsoever, whether subject to notice or not and in whatever currency denominated and whether held in the name of the Borrower alone or jointly with others wherever situate and set off or transfer any sums standing to the credit of any one or more such accounts in or towards satisfaction of any obligations and liabilities to the Bank of the Borrower whether such liabilities be present, future, actual, contingent, primary, collateral, joint or several and the Borrower expressly waives any rights of set-off that the Borrower may have, so far as is permitted by law, in respect of any claim which it may now or at any time hereafter have against the Bank and the Bank may use any such money to purchase any currency or currencies required to effect such application.

Drawdowns under the facility will be permitted subject to fulfillment of the following conditions precedent:

The Borrower hereby undertakes and covenants to the Bank that, for so long as any amount is outstanding by the Borrower to the Bank in terms hereof:

The Borrower warrants to the Bank that:

The following events shall constitute events of default:

If an event of default occurs then, in any such event, the full amount of the Facilities and any other facilities accorded to the Borrower by the Bank, then outstanding (whether or not it is due for payment), and all charges accrued thereon, together with additional interest under this Facility Letter shall immediately become due and payable. In addition, the Bank shall have the right to exercise all other remedies available to it under the laws of Zimbabwe.

For the sake of clarity, it is recorded and agreed that the events of default outlined in this clause shall not be capable of being remedied for purposes of this Facility Agreement.

If as a result of the Borrower’s default in terms of this agreement, the Bank instructs its Legal Practitioners to make demand or institute legal proceedings against the Borrower, the latter shall be responsible for, and shall, on demand, pay for all legal costs and disbursements so incurred, including all collection charges and costs on an attorney and client scale.

It is the practice of the Bank to review all credit facilities continuously in the light of the financial condition of the borrower. Therefore, notwithstanding anything in this proposal to the contrary, this facility is regarded as repayable on demand, at the option of the bank.

Funding of the Borrower’s requirements under the terms stated hereof shall be subject to the bank being able to raise the funding to avail same to the borrower

Nothing contained herein shall preclude the Bank from advancing a sum in excess of that referred to in clause 4 hereof and recovering and recovering the same in the event of default.

The Borrower expressly waives and renounces the legal benefits and exceptions non numeratae pecuniae (that the money has not been paid to the Borrower), non-causa debiti (that no just cause exists for the Borrower’s indebtedness), no value received, revision of accounts, de errori calculi (that the Borrower’s indebtedness has been calculated incorrectly), ordinis seu excussionis et divisionis (that co-principal debtors must first be excussed and that there will be a division of debt between co-principal debtors) and, where applicable, the benefit of de duobus vel pluribus reis debendi, (that two or more co-mortgagors will become jointly and severally liable), and the Borrower declares itself to be fully acquainted with the meaning and effect of these benefits and exceptions and of their remuneration.

Borrower shall be responsible for any disbursement and legal fees and expenses incurred in documenting this facility. The loan agreement shall be in accordance with the laws of Zimbabwe. Ecobank may charge the account of the borrower with the monthly fees and expenses associated with the facility.

The commitment is conditional upon (i) the preparation, execution and delivery of legal documentation in the form and substance satisfactory to Ecobank Zimbabwe Limited and its Counsel substantially incorporating the terms and conditions outlined or referred to above and (ii) the absence of a material adverse change in the financial condition.

Please note that all banks are required to make available information concerning credit facilities to the Reserve Bank of Zimbabwe (RBZ). Information on this credit facility will therefore be made available to the Central Bank.

The physical address, email address, facsimile, telephone or cellular phone number (and the department or officer, if any, for whose attention the communication is to be made) of each Party for any communication or document to be made or delivered under or in connection with this Facility Letter is that identified with its name below:

To indicate the Borrower’s acceptance of the foregoing, kindly initial each page of the duplicate of this letter, and sign the final page of this letter and return it to the Bank within 14 days from the date of this Facility Letter, together with the following:

We trust that the foregoing is acceptable to you and will lead to a long and mutually beneficial association.

Yours faithfully