KORYX COPPER

NOTICE OF ANNUAL GENERAL MEETING TO BE HELD ON JULY 29, 2026

NOTICE IS HEREBY GIVEN that the general meeting (the “Meeting”) of the holders (the “Shareholders”) of ordinary shares (the “Ordinary Shares”) of KORYX COPPER S.A. (“Koryx” or the “Company”) will be held on July 29, 2026, at 7:30 a.m. (Pacific Daylight Time) / 4:30 p.m. (Central European Time). Koryx Copper S.A. is conducting a hybrid Shareholders’ meeting, allowing participation both online and in person. Registered shareholders and duly appointed proxyholders (as defined in this Information Circular) can attend the Meeting in person at 17, Bd Friedrich Wilhelm Raiffeisen, Gasperich, L-2411 Luxembourg, Grand Duchy of Luxembourg or online at https://meetnow.global/M6K9TJS to participate, vote, or submit questions at the meeting.

All items on the agenda of the Meeting are to be adopted in accordance with the quorum and majority requirements applicable to an ordinary general meeting.

Business of the Meeting

1. to receive and consider the audited consolidated financial statements of the Company for its fiscal year ended August 31, 2025, together with the auditor’s report thereon;
2. renewal of the mandate of Mr Heye Daun as a director for a term extending until the next annual general meeting of the Company in 2027;
3. renewal of the mandate of Mr Alan Friedman as a director for a term extending until the next annual general meeting of the Company in 2027;
4. renewal of the mandate of Mr Charles Loots as a director for a term extending until the next annual general meeting of the Company in 2027;
5. renewal of the mandate of Mr Alfredo Luis Riviere Rodriguez as a director for a term extending until the next annual general meeting of the Company in 2027;
6. renewal of the mandate of Mr Tarik El Hanch as a director for a term extending until the next annual general meeting of the Company in 2027;
7. renewal of the mandate of Ms Cristina Lara as a director for a term extending until the next annual general meeting of the Company in 2027;
8. renewal of the mandate of Atrium Compliance Services Sàrl as the Company’s statutory auditor (commissaire) in Luxembourg for a term extending until the next annual general meeting of the Company in 2027;
9. to approve the Company’s restated omnibus long-term incentive plan as described in the management information circular dated June 11, 2026 (“Information Circular”) and in the form as set out at Schedule “B” thereto; and
10. grant power to accomplish the legal formalities.

The specific details of the resolutions to be put before the Meeting are set forth under the section “Particulars of Matters

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to be Acted Upon” of the Information Circular. The board of directors (the “Board”) has approved the contents of the Information Circular and the distribution of the Information Circular to Shareholders. All Shareholders are reminded to review the Information Circular before voting.

Voting

Shareholders have the right to vote if they were a Shareholder of the Company at the close of business on June 11, 2026, the record date set by the Board for determining the Shareholders entitled to receive notice of and vote at the Meeting or any adjournment(s) or postponement(s) thereof.

Proxies

Shareholders who are unable to attend the Meeting, whether in person or online, are encouraged to vote their proxy by mail, internet or telephone. Further information on how to vote by proxy at the Meeting can be found in the section “Voting” in the Information Circular. To be valid, a Shareholder’s proxy must be received by the Company’s transfer agent, Computershare Trust Company of Canada, no later than 7:30 a.m. (Pacific Daylight Time) / 4:30 p.m. (Central European Time) on July 27, 2026 or no later than forty-eight (48) hours (excluding Saturdays, Sundays and statutory holidays) prior to the date on which any postponement or adjournment of the Meeting is held.

Non-registered Shareholders who receive these materials through their broker or other intermediary are requested to follow the instructions for voting provided by their broker or intermediary, which may include the completion and delivery of a voting instruction form.

If you have any questions relating to the Meeting, please contact the Company by telephone at (604) 687-2038 or by email at [email protected]. You may also contact Computershare toll-free at 1-866-962-0498 (or 514-982-8716 for shareholders outside of Canada and the United States).

DATED at Luxembourg, Grand Duchy of Luxembourg, June 11, 2026.

BY ORDER OF THE BOARD OF DIRECTORS

“Heye Daun”

Heye Daun
Chief Executive Officer and President