IsoEnergy Completes C$57.5 Million Bought Deal Financing

Press Release

Toronto, ON, January 27, 2026 – IsoEnergy Ltd. (NYSE American: ISOU; TSX: ISO) (the “Company” or “IsoEnergy”) is pleased to announce that it has closed its previously announced bought deal financing, pursuant to which the Company sold 3,833,410 common shares of the Company (“Common Shares”) at a price of C$15.00 per Common Share for gross proceeds of C$57,501,150 (the “Offering”), which includes the full exercise of the over-allotment option. The Offering was conducted by a syndicate of underwriters, led by Stifel Canada, Canaccord Genuity Corp. and Jett Capital Advisors, LLC (the “Underwriters”).

The proceeds from the Offering are expected to be used to fund the continued development and further exploration of the Company’s mineral properties, and for general corporate purposes.

Additionally, the Company anticipates that closing of its previously announced non-brokered concurrent private placement (the “Concurrent Private Placement”) with NexGen Energy Ltd. (“NexGen”) will occur on or about the date hereof.

This press release shall not constitute an offer to sell or the solicitation of an offer to buy nor shall there be any sale of the securities in any state in which such offer, solicitation or sale would be unlawful. The securities have not been, nor will they be, registered under the United States Securities Act of 1933, as amended (the “U.S. Securities Act”) and may not be offered or sold in the United States absent registration or an applicable exemption from the registration requirements of the U.S. Securities Act, and applicable state securities laws.

About IsoEnergy Ltd.

IsoEnergy (NYSE American: ISOU; TSX: ISO) 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.

For further information, please contact:

IsoEnergy Ltd.
Philip Williams, CEO and Director
(833) 572-2333
info@isoenergy.ca

IBF4