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OGC.TO ·

Oceanagold Announces Change of Directors

Management Changes

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15 August 2022 News Release

OCEANAGOLD ANNOUNCES CHANGE OF DIRECTORS

(BRISBANE) OceanaGold Corporation (TSX : OGC) ( ASX: OGC) (“OceanaGold” or the

“Company”) announces the following changes to the Company’s Board of Directors.

Mr Michael McMullen has advised the Board of his intention to step down effective from the date

of this announcement in order to devote more time to pursue his other business interests. He will

be succeeded by Mr Al an Pangbourne, who will join the Company as a n independent non-

executive director commencing 1 October 2022.

Mr Paul Benson, Chair of Board of Directors, said, “On behalf of the Board, I would like to extend

our heartfelt gratitude to Mick for his contribution to the Company. As Chair of the Board Technical

Committee he oversaw the completion of the Haile technical review . Hi s significant technical

expertise has helped to guide performance improvement potential at the Company’s operations,

especially at the Haile Gold Mine, during a challenging time. The Board sincerely wishes him all

the best.”

Mr McMullen said, “OceanaGold is in a much better position now relative to when I joined the

Board. With the completion of the Haile technical review, solid performance at both the Didipio and

Haile operations and a stronger Management team, I am confident in the future of the Company

and will be following its progress with great interest.”

Mr Benson then continued, “I am delighted to welcome Alan to the Company. Alan has very diverse

managerial and operational experience in the resources industry with expertise in operations,

engineering and major project development. His extensive international experience as well as

track record of leadership and operational excellence provides considerable technical strength to

the OceanaGold Board of Directors. We look forward to him being a valuable member of the Board

as the Company continues to execute its strategy and focuses on delivering shareholder returns.”

Mr Pangbourne has 40 years of experience in global mining operations and is currently President

and Chief Executive Officer , as well as Executive Director, of Chesapeake Gold Corp. He was

previously a non -executive director and subsequently the President and CEO of Guyana

Goldfields, Chief Operating Officer of SSR Mining Inc. and Vice President Projects South America

for Kinross Gold Corporation.

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Mr Pangbourne also held various senior roles at BHP, including President and Chief Operating

Officer of Nickel Americas, Projects Director for BHP’s Uranium Division and Project Manager for

BHP’s Spence copper project in Chile. He holds a Bachelor of Applied Science (Extractive

Metallurgy) and a Graduate Diploma in Mineral Processing from the Western Australian School of

Mines.

- ENDS -

Authorised for release to market by OceanaGold Corporate Company Secretary, Liang Tang.

For further information please contact:

Investor Relations:

Brian Martin, Senior Vice President, Business Development & Investor Relations

Tel: +1 604 763 4438

[email protected]

Sabina Srubiski, Director, Investor Relations

Tel: +1 604-351-7909

[email protected]

Media Relations:

Anita Kharbanda, Acting Group Manager, Communications

Tel: +61 420 696 937

[email protected]

About OceanaGold

OceanaGold is a multinational gold producer committed to the highest standards of technical,

environmental, and social performance. For 31 years, we have been contributing to excellence in

our industry by delivering sustainable environmental and social outcomes for our communities,

and strong returns for our shareholders. Our global exploration, development, and operating

experience has created an industry-leading pipeline of organic growth opportunities and a portfolio

of established operating assets including Didipio Mine in the Philippines; Macraes and Waihi

operations in New Zealand; and Haile Gold Mine in the United States of America.

Cautionary Statement for Public Release

Certain information contained in this public release may be deemed “forward- looking” within the

meaning of applicable securities laws. Forward-looking statements and information relate to future

performance and reflect the Company’s expectations regarding the generation of free cash flow,

execution of business strategy, future growth, future production, estimated costs, results of

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operations, business prospects and opportunities of OceanaGold Corporation 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", o r 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 differ materially from those expressed in the forward-looking statements

and information. They include, among others, the accuracy of mineral reserve and resource

estimates and related assumptions, inherent operating risks and those risk factors identified in the

Company’s most recent Annual Information Form prepared and filed with securities regulators

which is available on SEDAR at www.sedar.com under the Company’s name. There are no

assurances the Company can fulfil forward- looking statements and information. Such forward-

looking statements and information are only predictions based on current information available to

management as of the date that such predictions are made; actual events or results may differ

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 and infor mation

contained in this press 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 and information. 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. The information contained in this release is not investment or

financial product advice.

NOT FOR DISSEMINATION OR DISTRIBUTION IN THE UNITED STATES AND NOT FOR

DISTRIBUTION TO US NEWSWIRE SERVICES.