Osisko Gold Announces Pricing of Upsized US$600 Million 9.250% Senior Secured Notes Offering to Refinance Appian Project Financing Facility and Advance Cariboo Gold Project

Osisko Gold Group Inc. has priced its offering of US$600 million aggregate principal amount of 9.250% senior secured notes due 2031, upsizing the previously announced offering from US$500 million. The net proceeds will be used to refinance the existing senior secured project loan facility with Appian Capital Advisory Limited and fund the construction of the Cariboo Gold Project in British Columbia. The notes are expected to close on September 30, 2026, subject to customary conditions, and are secured by a first-priority lien on the Company’s and guarantors’ properties.

The offering was priced at 100.0% of the aggregate principal amount. Approximately US$120.9 million of the proceeds will be used to repay all amounts outstanding and terminate commitments under the Appian Credit Facility. The remaining funds will support a segregated interest reserve account equal to the first five interest payments on the Notes, with the balance advancing the Cariboo Gold Project via a segregated disbursement account.

Interest on the notes will pay semi-annually in arrears on April 1 and October 1, commencing April 1, 2027, with maturity on October 1, 2031. The securities are fully and unconditionally guaranteed by certain subsidiaries, expected to include Barkerville Gold Mines Ltd. They are secured by a first-priority lien on the Company’s and each guarantor’s property, including equity interests, the interest reserve account, the disbursement account, and personal and real property.

The notes are sold to qualified institutional buyers under Rule 144A and to non-U.S. persons under Regulation S, and are sold in Canada on a private placement basis.