On May 30, 2025, IsoEnergy Ltd. entered into an equity distribution agreement with Virtu Canada Corp. and Virtu Americas LLC (collectively, the “Agents”) to launch an at-the-market (ATM) equity offering of up to US$75,000,000 (C$103 million) of common shares. The Offered Shares may be issued and sold from time to time through or to the Agents, acting as either agents or principals, on the TSX Venture Exchange, the Nasdaq Capital Market, or other eligible trading platforms in Canada and the United States.

The ATM offering is being made concurrently under a Canadian prospectus supplement dated May 30, 2025, to IsoEnergy’s short form base shelf prospectus dated May 7, 2024, and a U.S. registration statement on Form F-10 filed with the U.S. Securities and Exchange Commission. Net proceeds will be used for general corporate purposes, including the advancement of IsoEnergy’s uranium exploration and development projects, potential acquisitions, and working capital.

Legal counsel to IsoEnergy comprises Cassels Brock & Blackwell LLP (Canada) and Paul, Weiss, Rifkind, Wharton & Garrison LLP (U.S.). The Agents are represented by Borden Ladner Gervais LLP (Canada) and Duane Morris LLP (U.S.). No assurances are given that any shares will be sold under the ATM program.