Oceanagold Increases 2018 Production Guidance

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MEDIA RELEASE

19 June 2018

OCEANAGOLD INCREASES 2018 PRODUCTION GUIDANCE

(MELBOURNE) OceanaGold Corporation (TSX: OGC) (ASX: OGC) (the “Company”) is pleased to announce

that is has increased its 2018 consolidated gold production guidance on the back of strong operating

performance and improvements to the mine plan at the Didipio Operation. As a result, the Company’s 2018

gold production guidance range has been revised upward and now sits at 500,000 to 540,000 ounces.

Mick Wilkes, President and CEO said, “We have had a strong operating and financial performance in the first

half of this year with our operations achieving better than expected results. With the improvement to the mine

plan, Didipio continues to outperform and present opportunities for further optimisation while ramp-up of the

underground is progressing nicely. Operating performance at Haile has been strong with recent solid plant

performance while mining activities are gradually improving. In New Zealand, after a slow start Waihi is back

on track while Macraes is slightly exceeding expectations with improved plant performance and a steady

feed of higher grade ore from Coronation North.”

“With the increase to our production guidance and strong financial performance, we fully expect to maintain

our standing as one of the most profitable gold companies globally.”

- ENDS -

For further information please contact:

Investor Relations Media Relations

Sam Pazuki

Tel: +1 416 915 3123

Melissa Bowerman

Tel: +61 459 900 099

Jeffrey Sansom

Tel: +61 3 9656 5300

[email protected] [email protected]

www.oceanagold.com | Twitter: @OceanaGold

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About OceanaGold

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 Philippines. 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 open 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 over the past 27 years with a proven track-record for environmental

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

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

designed to build capacity and not dependency.

The Company has recently increased its 2018 guidance range and now expects to produce 500,000 to

540,000 ounces of gold and 15,000 to 16,000 tonnes of copper with All-In Sustaining Costs that range from

$725 to $775 per ounce sold.

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