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Oceanagold Publishes Updated National Instrument 43-101 Technical Report FOR Waihi

Technical Reports (NI 43-101)

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MEDIA RELEASE

29 March 2019

OCEANAGOLD PUBLISHES UPDATED NATIONAL INSTRUMENT 43-101

TECHNICAL REPORT FOR WAIHI

(MELBOURNE) OceanaGold Corporation ( TSX: OGC ) ( ASX: OGC ) (the “Company”) has published an

updated National Instrument 43-101 compliant technical report (collectively “Technical Report”) for the Waihi

Gold Mine located on the North Island of New Zealand. The updated Technical Report follows the release of

the Company’s Annual Information Form (“AIF”) for the year ended December 31, 2018.

The updated Technical Report also follows the Waihi resources news release dated March 7, 2019 which

announced a significant increase in Measured and Indicated Resources and Inferred Resources mainly from

the Martha Underground Project and the WKP prospect . The Company continues to advance the Martha

Underground Project to operations while drilling several underground targets and the WKP prospect.

The Technical Report has been pr epared by qua lified persons from the Company and is an update to the

previous report for the Waihi Gold Mine dated November 24, 2015. It has been filed with the relevant stock

exchanges and is also available on SEDAR and the Company’s website at www.oceanagold.com.

- ENDS -

For further information please contact:

Investor Relations Media Relations

Sam Pazuki

Tel: +1 416 915 3123

Melissa Bowerman

Tel: +61 459 900 099

[email protected] [email protected]

www.oceanagold.com | Twitter: @OceanaGold

About OceanaGold

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OceanaGold Corporation is a mid -tier, high-margin, multinational gold producer with assets located in the

Philippines, New Zealand and the United States. The Company’s assets encompass the Didipio Gold-Copper

Mine located on the island of Luzon in the Phil ippines. On the North Island of New Zealand, the Company

operates the high-grade Waihi Gold Mine while on the South Island of New Zealand, the Company operates

the largest gold mine in the country at the Macraes Goldfield which is made up of a series of op en pit mines

and the Frasers underground mine. In the United States, the Company operates the Haile Gold Mine, a top-

tier, long-life, high-margin asset located in South Carolina. OceanaGold also has a significant pipeline of

organic growth and exploration opportunities in the Americas and Asia-Pacific regions.

OceanaGold has operated sustainably since 1990 with a proven track-record for environmental management

and community and social engagement. The Company has a strong social license to operate and work s

collaboratively with its valued stakeholders to identify and invest in social programs that are designed to build

capacity and not dependency.

In 2019, the Company expects to produce between 500,000 to 550,000 ounces of gold and 14,000 to 15,000

tonnes of copper at All-In Sustaining Costs ranging between $850 and $900 per ounce sold.

Cautionary Statement for Public Release

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

applicable securities la ws. 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 ope rations, 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", 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 eve nts 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 stat ements 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 r isks

facing the Company, some of which are beyond the Company's control. Although the Company believes

that any forward-looking statements and information contained in this press release is based on reasonable

assumptions, readers cannot be assured that a ctual 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 forwa rd-

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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.