Osisko Mining Acquired by Gold Fields

Following the successful completion of its previously announced plan of arrangement, Osisko Mining Inc. announced that Gold Fields Limited acquired all of Osisko’s issued and outstanding common shares through Gold Fields Windfall Holdings Inc., its 100 % owned Canadian subsidiary.

This premium transaction represents a strong and near-term outcome for our shareholders and is reflective of the truly world-class nature of the Windfall Project. In the span of nine years, we've transformed Windfall into one of the largest and highest-grade gold development projects globally, and this transaction is a testament to the extraordinary entrepreneurial effort of the Osisko Mining team.

John Burzynski, Chairman and Chief Executive Officer, Osisko Mining Inc.

Burzynski added, “Gold Fields is a globally diversified senior gold producer with an impressive track record of successfully building and operating mines. As our (now former) joint venture partner at Windfall, Gold Fields knows the asset well and understands the significance of the strong relationships that we have built in Québec with all of our stakeholders. Moreover, Gold Fields share our core principles of operating in a safe, inclusive and socially responsible manner. They are well suited to take Windfall into production, and we wish them all the best going forward.”

Under the terms of the arrangement, each former Osisko shareholder holding shares before the effective date is entitled to C$4.90 per share. The Ontario Superior Court of Justice issued a Final Order approving the arrangement on October 22, 2024, and the arrangement took effect on October 25.

Former Osisko registered shareholders are reminded to complete, sign, and return the letter of transmittal to TSX Trust Company, the depositary for the arrangement, along with the share certificate or DRS advice for their shares to receive the consideration they are entitled to under the arrangement.

The consideration owed to former non-registered shareholders under the arrangement will be deposited directly into their brokerage accounts. Non-registered shareholders with questions about the process for receiving their consideration should contact their broker or intermediary.

The shares are expected to be delisted from the Toronto Stock Exchange within two business days of closing. Osisko also plans to apply to the relevant securities authorities to cease being a reporting issuer and to end its public reporting obligations. Following the completion of the arrangement, all of Osisko's directors and senior officers have resigned from their positions.