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OceanaGold Reports Fourth Quarter and Full Year 2024 Operating and Financial Results

Financials

† See “Non-IFRS Financial Information”

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February 19, 2025 News Release

OceanaGold Reports Fourth Quarter and Full Year 2024 Operating and

Financial Results

(All financial figures in United States dollars unless otherwise stated)

• Met 2024 updated production guidance and achieved record annual production at Haile

• Record annual Net Profit of $192 million and Free Cash Flow of $245 million

• Doubling of annual dividend and intend to repurchase up to $100 million of shares in 2025

(VANCOUVER) OceanaGold Corporation (TSX: OGC; OTCQX: OCANF) ("OceanaGold" or the

“Company”) reported its operational and financial results for the three months and year ended

December 31, 2024. The condensed interim consolidated financial statements and Management's

Discussion and Analysis (“MD&A”) are available at www.oceanagold.com.

Fourth Quarter and Full Year Highlights

• Fourth quarter production of 150,900 ounces of gold and 3,100 tonnes of copper, an increase in gold

production of 12% from the prior quarter

• Record quarterly and annual production at Haile and best quarterly production at Waihi since

production commenced at Martha Underground in 2021

• Full year 2024 production of 488,800 ounces of gold and 12,300 tonnes of copper, achieving updated

production guidance

• Quarterly and full year All-In Sustaining Cost (AISC)† of $1,563 and $1,777 per ounce, respectively

• Record quarterly and annual revenue of $427 million and $1.29 billion, respectively

• Record quarterly and annual Net Profit† of $103 million and $192 million, respectively

• Adjusted EPS† of $0.15, an increase of 67% from the prior quarter

• Fourth quarter EBITDA Margin† of 58% and Operating Cash Flow Per Share† of $0.36

• Record quarterly and annual Free Cash Flow† of $147 million and $245 million, respectively

• Repaid the remaining $85.0 million of the revolving credit facility during the quarter, ending the year

with Net Cash† of $192 million

• Repurchased 8.8 million common shares ($24.1 million) since July, 2024, at an average price of

CAD$3.79 per share

• Doubled annual dividend to $0.01 per share quarterly

• Declared an initial Mineral Reserve at Wharekirauponga of 4.1 Mt at 9.2 g/t for 1.21 Moz Au

• Total Mineral Reserves increased by 27% to 6.2 Moz Au, net of mining depletion

† See “Non-IFRS Financial Information”

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Gerard Bond, President and CEO of OceanaGold, said "The fourth quarter was tremendous, delivering

numerous operational and Company records, highlighted by record quarterly Free Cash Flow of

$147 million. These strong results were driven by record production at Haile and a strong performance by

both Macraes and Waihi. We continued to invest at all four operations while increasing shareholders'

ownership of the Company by fully repaying the credit facility and actively buying back shares, finishing the

year with net cash of $192 million. In 2024 we also successfully completed a number of major milestones

notably the OceanaGold Philippines IPO, the ramp- up of Haile's Horseshoe underground mine, and the

release of exceptional results in the Waihi District pre-feasibility study.

Looking forward, we expect another year of strong Free Cash Flow in 2025, and a significant step- up in

gold production and Free Cash Flow in 2026. We will continue to invest in our organic growth and

exploration projects and increase capital returns to our shareholders via the dividend and share- buyback

programs. I am also very excited by the value enhancing catalysts we have in 2025, such as obtaining the

permits and commencing construction at the high-grade Wharekirauponga underground mine, and further

exploration success at each of our sites."

Multi-Year Outlook

The Company maintains a strong multi-year outlook, with 20% growth in gold production from 2024 levels

by 2026.

Production & Cost Outlook 2025 2026

Gold production koz 450 - 520 550 - 620

Copper production kt 13 - 15 13 - 15

AISC† $/oz 1,900 - 2,050 1,400 - 1,600

Growth & Exploration Capital1 $M 120 - 130 190 - 215

1 Excludes sustaining exploration capital.

† See “Non-IFRS Financial Information”

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Q4 2024 Q3 2024 Q4 2023 2024 2023

Gold Produced1

Haile koz 75.2 64.9 37.6 212.6 152.5

Didipio koz 19.7 27.9 42.8 97.0 138.5

Macraes koz 37.9 28.3 36.1 125.4 137.0

Waihi koz 18.1 13.8 13.3 53.8 49.3

Total gold produced1 koz 150.9 134.9 129.8 488.8 477.3

Gold Sales

Haile koz 73.9 53.6 29.6 208.5 146.2

Didipio koz 20.8 28.9 39.7 100.4 135.7

Macraes koz 36.6 29.5 36.3 124.8 137.1

Waihi koz 19.0 12.8 13.2 54.0 48.9

Total gold sales koz 150.3 124.8 118.8 487.7 467.9

Average Gold Price $/oz 2,665 2,511 1,993 2,433 1,955

Copper Produced1 - Didipio koz 3.1 3.4 3.8 12.3 14.2

Copper Sales - Didipio koz 2.8 3.5 3.9 11.7 13.8

Average Copper Price $/lb 4.16 4.15 3.80 4.16 3.87

Cash Costs†

Haile $/oz 598 683 1,521 955 884

Didipio $/oz 1,033 824 549 851 614

Macraes $/oz 1,214 1,458 901 1,192 996

Waihi $/oz 1,130 1,538 1,345 1,427 1,300

Consolidated Cash Costs† $/oz 875 987 987 1,047 883

AISC†

Haile $/oz 1,287 1,537 2,570 1,628 1,921

Didipio $/oz 1,389 1,103 737 1,140 730

Macraes $/oz 1,535 2,099 1,468 1,906 1,570

Waihi $/oz 1,557 2,252 1,829 2,087 1,914

Consolidated AISC† $/oz 1,563 1,729 1,658 1,777 1,587

Free Cash Flow†2 $M 146.5 65.7 16.1 245.2 42.4

Net profit (loss) $M 102.7 60.6 (18.9) 192.0 83.1

Adjusted net profit† $M 107.6 66.4 6.6 208.3 120.1

Adjusted EBITDA† $M 251.3 162.8 91.6 604.0 413.6

Earnings (loss) per share3 $/share $0.14 $0.08 $(0.03) $0.26 $0.12

Adjusted earnings per share†3 $/share $0.15 $0.09 $0.01 $0.29 $0.16

Operating Cash Flow per share† $/share $0.36 $0.22 $0.12 $0.83 $0.56

Free Cash Flow per share† $/share $0.20 $0.09 $0.02 $0.34 $0.06

1 Production is reported on a 100% basis as all operations are controlled by OceanaGold.

2 Includes proceeds of $30.0 million from the sale of the Blackwater project in the second quarter of 2024.

3 Attributable to the shareholders of the Company.

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Management Update

The Company advises that David Londono, Chief Operating Officer Americas, is leaving OceanaGold to

return to Colombia for family reasons. His last day with the Company will be April 4, 2025. David has been

a valued member of OceanaGold since he joined Haile in July 2021 and has guided Haile through

operational improvements, permitting of the Haile expansion and mostly recently delivery of the Horseshoe

Underground mine into production.

Bhuvanesh Malhotra, Chief Technical and Projects Officer, will permanently assume David's executive

accountabilities for the Haile Gold Mine upon David’s departure. Mr. Malhotra has been with the company

since early 2024 and has over 25 years of experience in operational and technical roles across multiple

commodities and mining methods, driving safety performance, operational excellence, and sustainable

transformational change.

Dividend & Share Buyback

The Company is pleased to announce a doubling of the annual dividend payment, to $0.01 per common

share payable quarterly.

The Board has also approved the repurchase of up to $100 million of common shares in 2025. Under the

current NCIB ("Normal Course Issuer Bid") program announced in July 2024, the Company had

repurchased 8.8 million common shares as of December 31, 2024.

OceanaGold declared a $0.01 per share dividend in February 2025, payable in April 2025. Shareholders of

record at the close of business in each jurisdiction on March 5, 2025 (the "Record Date") will be entitled to

receive payment of the dividend on April 25, 2025. The dividend payment applies to holders of record of

the Company's common shares traded on the Toronto Stock Exchange.

Declaration of Dividend Wednesday February 19, 2025

Record Date Wednesday March 5, 2025

Dividend Payment Date Friday April 25, 2025

Dividends are payable in United States dollars. Shareholders in other jurisdictions can elect to participate

in Computershare’s international payments service if they want to receive dividends in an alternative

currency.

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Conference Call and Webcast:

Senior management will host a conference call / webcast to discuss the quarterly results on Thursday

February 20th at 10:00 am Eastern Time.

To register, please copy and paste the link into your browser: https://app.webinar.net/xO8eQlPQnKN

Toll-free North America: +1 888-510-2154

International: +1 437-900-0527

If you are unable to attend the call, a recording will be made available on the Company's website.

About OceanaGold

OceanaGold is a growing 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 Haile Gold Mine in the United States of

America; Didipio Mine in the Philippines; and the Macraes and Waihi operations in New Zealand.

For further information please contact:

Investor Relations:

Rebecca Henare, Vice President, Investor Relations

Tel: +1 604-678-4095

[email protected]

Media Relations:

Louise Burgess, Director, Communications

Tel: +1 604-403-2019

[email protected]

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Cautionary Statement for Public Release

This public 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 future financial and operating performance

of the Company, its mining projects, the future price of gold, the estimation of mineral reserves and mineral

resources, the realization of mineral reserve and resource estimates, costs of production, estimates of initial

capital, sustaining capital, operating and exploration expenditures, costs and timing of the development of

new deposits, costs and timing of the development of new mines, costs and timing of future exploration and

drilling pro grams, timing of filing of updated technical information, anticipated production amounts,

requirements for additional capital, governmental regulation of mining operations and exploration

operations, timing and receipt of approvals, consents and permits under applicable legislation,

environmental risks, title disputes or claims, limitations of insurance coverage and the timing and possible

outcome of pending litigation and regulatory matters. All statements in this public release that address

events or developments that we expect to occur in the future are forward- looking statements. Forward-

looking statements are statements that are not historical facts and are generally, although not always,

identified by words such as “may”, “plans”, “expects”, “projects” , “is expected”, “scheduled”, “potential”,

“estimates”, “forecasts”, “intends”, “targets”, “aims”, “anticipates” or “believes” or variations (including

negative variations) of such words and phrases, or may be identified by statements to the effect that certain

actions, events or results “may”, “could”, “would”, “should”, “might” or “will” be taken, occur or be achieved.

Forward-looking statements involve known and unknown risks, uncertainties and other factors which may

cause the actual results, performance or achievements of the Company to be materially different from any

future results, performance or achievements expressed or implied by the forward-looking statements. Such

risks include, among others: future prices of gold; general business; economic and market factors (including

changes in global, national or regional financial, credit, currency or securities markets); changes or

developments in global, national or regional political and social conditions; changes in laws (including tax

laws) and changes in IFRS or regulatory accounting requirements; the actual results of current production,

development and/or exploration activities; conclusions of economic evaluations and studies; fluctuations in

the value of the United States dollar relative to the Canadian dollar, the Australian dollar, the Philippines

Peso or the New Zealand dollar; changes in project parameters as plans continue to be refined; possible

variations of ore grade or recovery rates; failure of plant, equipment or processes to operate as anticipated;

accidents, labour disputes and other risks of the mining industry; political instability or insurrection or war;

labour force availability and turnover; adverse judicial decisions, inability or delays in obtaining financing or

governmental approvals; inability or delays in the completion of development or construction activities or in

the re-commencement of operations; legal challenges to mining and operating permits including the FTAA

as well as those 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

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Canadian securities regulators, which are available on SEDAR+ at sedarplus.com under the Company’s

name. The list is not exhaustive of the factors that may affect the Company's forward-looking statements.

The Company’s forward- looking statements are based on the applicable assumptions and factors

Management considers reasonable as of the date hereof, based on the information available to

Management at such time. These assumptions and factors include, but are not limited to, assumptions and

factors related to: the Company’s ability to carry on current and future operations, including: development

and exploration activities; the timing, extent, duration and economic viability of such operations, including

any mineral resources or reserves identified thereby; the accuracy and reliability of estimates, projections,

forecasts, studies and assessments; the Company’s ability to meet or achieve estimates, projections and

forecasts; the availability and cost of inputs ; the price and market for outputs, including gold; foreign

exchange rates; taxation levels; the timely receipt of necessary approvals or permits; the ability to meet

current and future obligations; the ability to obtain timely financing on reasonable terms when required; the

current and future social, economic and political conditions; and other assumptions and factors generally

associated with the mining industry.

The Company’s forward-looking statements are based on the opinions and estimates of Management and

reflect their current expectations regarding future events and operating performance and speak only as of

the date hereof. The Company does not assume any obligation to update forward- looking statements if

circumstances or Management's beliefs, expectations or opinions should change other than as required by

applicable law. There can be no assurance that forward- looking statements will prove to be accurate, an d

actual results, performance or achievements could differ materially from those expressed in, or implied by,

these forward-looking statements. Accordingly, no assurance can be given that any events anticipated by

the forward-looking statements will transp ire or occur, or if any of them do, what benefits or liabilities the

Company will derive therefrom. For the reasons set forth above, undue reliance should not be placed on

forward-looking statements.

Non-IFRS Financial Information

Adjusted Net Profit/(Loss) and Adjusted Earnings/(Loss) per share

These are used by Management to measure the underlying operating performance of the Company.

Management believes these measures provide information that is useful to investors because they are

important indicators of the strength of the Company’s operations and the performance of its core business.

Accordingly, such measures are intended to provide additional information and should not be considered

in isolation as a substitute for measures of performance prepared in accordance with IFRS. Adjusted Net

Profit/(Loss) is calculated as Net Profit/(Loss) less the impact of impairment expenses, write-downs, foreign

exchange (gains)/losses, gain on sale of assets, OGP listing costs and restructuring costs related to

transitioning certain corporate activities from Australia to Canada.

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Prior to the first quarter of 2024, Adjusted Net Profit/(Loss) was calculated using an adjustment for a specific

portion of unrealized foreign exchange gains/losses rather than the total foreign exchange gain/loss. The

comparative quarters have been recalculated adjusting for all foreign exchange gains/ losses.

The following table provides a reconciliation of Adjusted Net Profit/(Loss) and Adjusted Earnings/(Loss) per

share:

$M, except per share amounts Q4 2024 Q3 2024 Q4 2023 2024 2023

Net profit (loss) 102.7 60.6 (18.9) 192.0 83.1

Foreign exchange (gain) loss 3.0 (1.3) (6.9) 7.9 1.8

Write-down of assets 1.9 1.7 38.3 8.3 41.1

Gain on sale of Blackwater project — — — (17.6) —

Tax expense on sale of Blackwater project — — — 4.9 —

OGP listing costs — 5.4 — 10.9 —

Restructuring costs — — 3.7 1.9 3.7

Adjusted net profit 107.6 66.4 6.6 208.3 120.1

Adjusted weighted average number of common

shares - fully diluted

724.6 726.5 722.6 724.8 722.6

Adjusted earnings per share 0.15 0.09 0.01 0.29 0.17

EBITDA and Adjusted EBITDA

The Company’s Management believes that Adjusted EBITDA is a valuable indicator of its ability to generate

liquidity by producing operating cash flows to fund working capital needs, service debt obligations and fund

capital expenditures. EBITDA is defined as earnings before interest, tax, depreciation and amortization.

Adjusted EBITDA is calculated as EBITDA less the impact of impairment expenses, write- downs,

gains/losses on disposal of assets, listing costs, foreign exchange gains/losses and other non- recurring

costs. EBITDA Margin is calculated as EBITDA divided by revenue.

Prior to the first quarter of 2024, Adjusted EBITDA was calculated using an adjustment for a specific portion

of unrealized foreign exchange gains/losses rather than the total foreign exchange gain/loss. The

comparative quarters have been recalculated adjusting for all foreign exchange gains/losses.

The following table provides a reconciliation of EBITDA, Adjusted EBITDA and EBITDA Margin: