Mongoose Mining Ltd. — AGM Information 2024

Jun 1, 2024

MONGOOSE MINING LTD.

NOTICE OF ANNUAL GENERAL MEETING OF SHAREHOLDERS TO BE HELD ON JUNE 25, 2024

NOTICE IS HEREBY GIVEN THAT AN ANNUAL GENERAL MEETING (the " Meeting ") of holders (" Shareholders ") of common shares (" Common Shares ") of Mongoose Mining Ltd. (the " Company ") will be held at Company’s offices at 55 University Avenue, Suite 1805, Toronto, Ontario M5J 2H7 at 12:00 noon (Toronto time) on Tuesday, June 25, 2024, for the following purposes:

1. to receive and consider the audited financial statements of the Company for the year ended December 31, 2023 and the report of the auditor thereon;

2. to fix the number of directors of the Company to be elected at the Meeting at seven;

3. to elect directors to hold office until the next annual general meeting of the Company;

4. to appoint the auditor of the Company for the ensuing year and to authorize the board of directors to fix the auditor's remuneration; and

5. to transact such other business as may be properly brought before the Meeting or any adjournment thereof.

The board of directors of the Company has fixed the record date for the Meeting at the close of business on Friday, April 26, 2024 (the " Record Date "). Only Shareholders of record as at the Record Date are entitled to receive notice of the Meeting. Shareholders of record will be entitled to vote those Common Shares owned as at the Record Date, unless any such Shareholder transfers such Shareholder's Common Shares after the Record Date and the transferee of those Common Shares establishes that the transferee owns the Common Shares and demands, not later than 10 days before the Meeting, that the transferee's name be included in the list of Shareholders entitled to vote at the Meeting, in which case

The Management Information Circular (the “ Circular ”) has been prepared to help you make an informed decision on the matters to be voted on at the Meeting. Please review the Circular carefully before voting.

Shareholders are encouraged to complete, date, sign, and return the enclosed Proxy and return it to the Company’s offices at 55 University Avenue, Suite 1805, Toronto, Ontario M5J 2H7 in accordance with the instructions set out in the Proxy and the Circular.

The Meeting materials, including the Circular, are available on the Company’s website at www.MongooseMining.com and will remain on the website for at least one year from the date of the Meeting. The Meeting materials are also available on the Company’s profile on SEDAR+ at www.sedarplus.ca.

DATED this 29[th] day of May , 2024.

BY ORDER OF THE BOARD OF DIRECTORS

“Matthew Allas”

Matthew Allas, Chairman