OceanaGold Announces Acquisition of Ausgold

VANCOUVER, Aug. 17, 2026 /PRNewswire/ -- OceanaGold Corporation (TSX: OGC) (NYSE: OGC) ("OceanaGold" or the "Company") is pleased to announce it has entered into a definitive scheme implementation deed (the "SID") to acquire 100% of the issued shares of Ausgold Limited (ASX: AUC) ("Ausgold"), the owner of the Katanning Gold Project ("Katanning") in Western Australia, by way of an Australian court-approved scheme of arrangement (the "Scheme" or the "Transaction").

Under the terms of the Transaction, Ausgold shareholders will receive 0.03365 common shares of OceanaGold for each share of Ausgold held ("Scheme Consideration"). The Scheme Consideration implies a total offer value of A$1.36 per Ausgold share, implying a total transaction equity value of approximately A$776M (US$549M)(1). Ausgold shareholders also have the opportunity to elect to receive the Scheme Consideration value in cash ("Cash Alternative"), subject to scale-back based on a maximum available cash pool for the Transaction of A$194M (US$137M)(1).