Comet Lithium Corporation — Proxy Solicitation & Information Statement 2026

May 14, 2026

COMET LITHIUM CORPORATION

NOTICE OF ANNUAL AND SPECIAL MEETING OF SHAREHOLDERS

June 15, 2026

TAKE NOTICE that an Annual and Special Meeting of shareholders (the “Meeting”) of COMET LITHIUM CORPORATION (the “Corporation”) will be held:

Place: Offices of Fasken Martineau DuMoulin LLP
800 Square-Victoria
Suite 3500
Montreal, Québec H3C 0B4

Date: June 15, 2026

Time: 2:00 p.m.

The purposes of the Meeting are to:

1. Receive and consider the financial statements of the Corporation for the fiscal year ended December 31, 2025 and the auditor’s report thereon;
2. Elect directors;
3. Appoint the auditor and authorize the directors to fix its remuneration;
4. Consider, and if deemed advisable to adopt, a resolution in the form annexed as Schedule B to the accompanying management information circular of the Corporation dated May 11, 2026 (the “Circular”), ratifying, approving and confirming the Corporation’s equity incentive plan, as more particularly described in the Circular;
5. Consider and if deemed advisable adopt, with or without amendment, a special resolution in the form annexed as Schedule C to the Circular, approving an amendment to the Articles of the Corporation so as to change its corporate name to “Comet Minerals Corp. / Minéraux Comète Corp.”, as more particularly described in the Circular; and
6. Transact such other business as may properly be brought before the Meeting.

Only persons registered as shareholders on the records of the Corporation as of the close of business on May 11, 2026 are entitled to receive notice of, and to vote or act at, the Meeting. No person who becomes a shareholder after the Record Date will be entitled to vote or act at the Meeting or any adjournment thereof.

If you are unable to attend the Meeting in person, please date, complete and sign the enclosed form of proxy and deliver it to Computershare Investor Services Inc. (i) by mail or hand delivery to Proxy Department, 320 Bay Street, 14th Floor, Toronto, Ontario M5H 4A6, or (ii) by facsimile to 416-263-9524 or 1-866-249-7775. A shareholder may also vote using the Internet at www.investorvote.com or by telephone at 1-866-732-8683. In order to be valid and acted upon at the Meeting, the form of proxy must be received no later than 5:00 p.m. (eastern time) on June 11, 2026 or be deposited with the Secretary of the Corporation before the commencement of the Meeting or any adjournment thereof.

DATED at Rouyn-Noranda, Québec
May 11, 2026

BY ORDER OF THE BOARD OF DIRECTORS

(signed) Vincent Metcalfe
Vincent Metcalfe
President and Chief Executive Officer