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OGC.TO ·

OceanaGold Commences Trading on the New York Stock Exchange

Listings & Exchange

www.oceanagold.com 1

NEWS RELEASE

April 7, 2026

OceanaGold Commences Trading on the New York Stock Exchange

VANCOUVER, BC – OceanaGold Corporation (TSX: OGC) (NYSE: OGC) (“OceanaGold” or the

“Company”) is pleased to announce the Company’s common shares have commenced trading on the

New York Stock Exchange (“NYSE”) at market open today, Tuesday April 7, 2026, under the ticker symbol

“OGC” . Quotation of OceanaGold’s securities on the U.S. OTC Markets has been discontinued. The

Company’s common shares will continue to trade in Canadian dollars on the Toronto Stock Exchange

(“TSX”) under the same ticker symbol, “OGC” . Shareholders are not required to take any action.

Image courtesy of NYSE Group. NYSE does not recommend or endorse any investments, investment strategies, companies,

products or services.

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About OceanaGold

OceanaGold is a global intermediate gold and copper producer committed to safely and responsibly

maximizing the generation of Free Cash Flow from our operations and delivering strong returns for our

shareholders. We have a portfolio of four operating mines: the wholly-owned Haile Gold Mine in the

United States of America; the wholly-owned Macraes and Waihi operations in New Zealand; and the 80%-

owned Didipio Mine in the Philippines.

For further information please contact:

Investor Relations:

Rebecca Henare, VP , Investor Relations

Tel: +1 604-678-4095

[email protected]

Valerie Burns, Manager, Investor Relations

Tel: +1 604-235-0742

[email protected]

Media Relations:

Louise Burgess, VP , Communications

Tel: +1 604-403-2019

[email protected]

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Cautionary Statement Regarding Forward-Looking Information

This news release contains certain “forward-looking statements” and “forward-looking information” (collectively, “forward-

looking statements”) within the meaning of applicable Canadian securities laws, which may include, but is not limited to,

statements with respect to the trading of the Company’s common shares on the NYSE. All statements other than

statements of historical facts included in this news release constitute forward-looking statements. Forward-looking

statements and information relate to future performance and reflect the Company’s expectations regarding the execution

of business strategy, future growth, future production, estimated costs, results of operations, business prospects and

opportunities of OceanaGold and its related subsidiaries. Any statements that express or involve discussions with respect

to predictions, expectations, beliefs, plans, projections, objectives, assumptions or future events or performance (often,

but not always, using words or phrases such as “expects” or “does not expect” , “is expected” , “anticipates” or “does not

anticipate” , “plans” , “estimates” or “intends” , or stating that certain actions, events or results “may” , “could” , “would” ,

“might” or “will” be taken, occur or be achieved) are not statements of historical fact and may be forward-looking

statements. Forward-looking statements are subject to a variety of risks and uncertainties which could cause actual events

or results to diƯer materially from those expressed in the forward-looking statements. They include, among others, those

risk factors identified and described in more detail in the section entitled “ “Risk Factors”” contained in the Company’s most

recent Annual Information Form and the Company’s other filings with Canadian securities regulators, which are available

on SEDAR+ at www.sedarplus.com ca under the Company’s name. There are no assurances the Company can fulfil

forward-looking statements. Such forward-looking statements are only predictions based on current information available

to Management as of the date that such predictions are made; actual events or results may di Ưer materially as a result of

risks facing the Company, some of which are beyond the Company’s control. Although the Company believes that any

forward-looking statements contained in this news release is based on reasonable assumptions, readers cannot be

assured that actual outcomes or results will be consistent with such statements. Accordingly, readers should not place

undue reliance on forward-looking statements. The Company expressly disclaims any intention or obligation to update or

revise any forward-looking statements and information, whether as a result of new information, events or otherwise, except

as required by applicable securities laws.