Mr. John Burzynski reports

OSISKO MINING OBTAINS INTERIM ORDER FOR PLAN OF ARRANGEMENT; UPDATE ON SPECIAL MEETING FOR GOLD FIELDS TRANSACTION

Osisko Mining Inc. has obtained an interim order from the Ontario Superior Court of Justice (Commercial List) in respect of the acquisition by Gold Fields Ltd., through a 100-per-cent-owned Canadian subsidiary (the purchaser), of Osisko by way of plan of arrangement under the Business Corporations Act (Ontario).

The interim order, among other things, authorizes Osisko to call and hold a special meeting of shareholders of Osisko to approve the arrangement. In accordance with the interim order, the special meeting is schedule to be held at 10 a.m. (Toronto time) on Thursday, Oct. 17, 2024, at the offices of Bennett Jones LLP, suite 3400, One First Canadian Place, Toronto, Ont., Canada.

Under the terms of the arrangement, the purchaser has agreed to acquire all of the issued and outstanding common shares of Osisko at a price of $4.90 per share (the consideration). The consideration represents a premium of approximately 55 per cent to the 20-day volume weighted average trading price per share on the Toronto Stock Exchange for the period ending Aug. 9, 2024, being the last trading day prior to the announcement of the arrangement.

Shareholders of Osisko as of Aug. 30, 2024, being the record date of the special meeting, will receive notice of, and be entitled to vote at, the special meeting. A management information circular of Osisko, which will provide further information about the arrangement, will be mailed to shareholders of Osisko in due course.

The circular will include the unanimous recommendation of the board of directors of Osisko for Osisko's shareholders to vote for the arrangement. The circular will be available in due course on SEDAR+ under Osisko's issuer profile.

The hearing date for the application for the final order of the court is scheduled for Oct. 22, 2024. The arrangement is anticipated to become effective on or about Oct. 25, 2024, subject to obtaining the required approvals from the shareholders of Osisko, the final order from the court, the receipt of all approvals under the Competition Act (Canada) and the satisfaction or waiver of all other closing conditions.

Shareholder questions

For shareholder inquiries regarding the arrangement, please contact Laurel Hill Advisory Group:

North America toll-free:  1-877-452-7184

Calls outside North America:  416-304-0211

E-mail:   assistance@laurelhill.com

About Osisko Mining Inc.

Osisko is a mineral exploration company focused on the acquisition, exploration and development of precious metal resource properties in Canada. Osisko holds a 50-per-cent interest in the high-grade Windfall gold deposit located between Val d'Or and Chibougamau in Quebec and holds a 50-per-cent interest in a large area of claims in the surrounding Urban Barry area and nearby Quevillon area (over 2,300 square kilometres).

We seek Safe Harbor.