Mr. Philip Williams reports

ISOENERGY LTD. ANNOUNCES BOUGHT DEAL FINANCING

IsoEnergy Ltd. has entered into an agreement with a syndicate of underwriters led by Stifel Nicolaus Canada Inc. and Canaccord Genuity Corp., pursuant to which the underwriters have agreed to purchase, on a bought deal basis, five million common shares of the company at a price of $10 per common share for gross proceeds of $50-million.

The company has agreed to grant the underwriters an overallotment option to purchase up to an additional 750,000 common shares at the offering price, exercisable in whole or in part, at any time and from time to time on or prior to the date that is 30 days following the closing of the offering to cover overallotments, if any, and for market stabilization purposes. If this option is exercised in full, an additional $7.5-million in gross proceeds will be raised pursuant to the offering, and the aggregate gross proceeds of the offering will be $57.5-million.

The proceeds from the offering are expected to be used to finance the continued development and further exploration of the company's mineral properties and for general corporate purposes.

The common shares will be offered by way of a prospectus supplement to be filed in all of the provinces and territories of Canada, except Quebec, and in the United States on a private placement basis, and other jurisdictions outside of Canada and the United States provided that no prospectus filing or comparable obligation arises. Access to the prospectus supplement and the corresponding base shelf prospectus and any amendment thereto will be accessible within two business days under the company's profile on SEDAR+ in accordance with securities legislation relating to procedures for providing access to a base shelf prospectus, a prospectus supplement and any amendment thereto. An electronic or paper copy of the prospectus supplement and the corresponding base shelf prospectus may be obtained, without charge, from ProspectusCanada@stifel.com by providing the contact with an e-mail address or address, as applicable.

The offering is scheduled to close on or about June 24, 2025, and is subject to certain conditions, including, but not limited to, the receipt of all necessary approvals to list the common shares on the required exchanges, which listings shall be conditionally approved prior to closing of the offering.

About IsoEnergy Ltd.

IsoEnergy is a leading, globally diversified uranium company with substantial current and historical mineral resources in top uranium mining jurisdictions of Canada, the U.S. and Australia at varying stages of development, providing near-, medium- and long-term leverage to rising uranium prices. IsoEnergy is currently advancing its Larocque East project in Canada's Athabasca basin, which is home to the Hurricane deposit, boasting the world's highest-grade indicated uranium mineral resource.

IsoEnergy also holds a portfolio of permitted past-producing, conventional uranium and vanadium mines in Utah with a toll milling arrangement in place with Energy Fuels. These mines are currently on standby, ready for rapid restart as market conditions permit, positioning IsoEnergy as a near-term uranium producer.

We seek Safe Harbor.