(All monetary figures in United States bucks except in a different way said)

• On the right track in order complete yr steering with robust This autumn advancing as deliberate
• Isolated Money Stream^† of $94 million with $335 million of money and incorrect debt at quarter terminate
• Proportion buyback program larger via 75% to $175M, anticipated to be finished via yr terminate

VANCOUVER, BC, Nov. 5, 2025 /PRNewswire/ – OceanaGold Company (TSX: OGC) (OTCQX: OCANF) (“OceanaGold” or the “Company”) reported its operational and monetary effects for the 3 and 9 months ended September 30, 2025. The condensed intervening time consolidated monetary statements and Control’s Dialogue and Research (“MD&A”) are to be had at www.oceanagold.com.

3rd Quarter Highlights

• Stay on the right track in order complete yr manufacturing, price and capital steering.
• Safely and responsibly produced 103,500 oz of gold and three,100 tonnes of copper.
• Wastefulness stripping at Haile and Macraes is definitely complicated, with higher-grade ore from the discoverable pits delivered within the 3rd quarter, positioning each websites in order a powerful fourth quarter.
• All-In Maintaining Value (“AISC”)^† of $2,052 in line with ounce yr to moment, anticipating to be decrease within the fourth quarter commensurate with larger gold manufacturing.
• File quarterly income of $449 million supported via file moderate learned gold worth of $3,476 in line with ounce, and not using a hedges or prepays.
• Quarterly attributable internet benefit of $87 million, EPS of $0.38 and Adjusted EPS^† of $0.40.
• EBITDA Margin^† of 46% and Working Money Stream Consistent with Proportion^† of $0.93.
• Generated robust Isolated Money Stream^† of $94 million within the quarter and $283 million yr to moment, make happen a trailing 12-month Isolated Money Stream^† handover¹ of 15%.
• Money stability larger via 12% from the prior quarter to $335 million and not using a debt.
• Finished $39 million in proportion repurchases within the quarter at a mean worth of CAD$24.14.
• Proportion buyback program for 2025 larger via 75% to $175 million, with $100 million repurchased yr to moment as of November 5, 2025.
• Declared a $0.03 in line with proportion quarterly dividend, payable in December 2025.
• Ongoing exploration luck at Haile, demonstrating the upside for low-risk natural expansion inside the current portfolio of property.
• Speedy-track allow commendation for the Waihi North Undertaking is predicted via year-end.

Gerard Bond, President and CEO of OceanaGold, mentioned: “The 3rd quarter used to be any other length of secure and accountable gold manufacturing through which we persisted to generate really extensive Isolated Money Stream, regardless of it being the deliberate lowest manufacturing quarter of the yr. The funding made in wastefulness stripping at Haile and Macraes all the way through 2025 has us in pristine discoverable pit ore at each mines now, which positions us for the fourth quarter to be our most powerful quarter of the yr. Allowing of our Waihi North Undertaking, which incorporates the high-grade Wharekirauponga underground, is progressing smartly and we proceed to be expecting commendation via yr terminate – in the intervening time we’re advancing early works actions.

The numerous Isolated Money Stream we’ve got generated yr to moment of $283 million has allowed us to pay the next dividend in 2025, proceed to improve our stability sheet and build up our proportion buyback program for 2025 via 75% to $175 million. Our center of attention on making an investment in horny natural expansion and our disciplined capital allocation framework displays our persisted constancy to making price and turning in robust returns to our shareholders.”

Proportion Buyback and Dividend

As of November 5, 2025, the Corporate had finished the deliberate $100 million of proportion repurchases for 2025. The Board has licensed a 75% build up to the proportion buyback program for 2025, with a complete of $175 million in proportion buybacks anticipated to be finished via yr terminate.

OceanaGold has declared a $0.03 in line with proportion dividend payable in December 2025. Shareholders of file on the near of commercial in each and every jurisdiction on November 19, 2025 (the “Record Date”) will probably be entitled to obtain cost of the dividend on December 19, 2025. The dividend cost applies to holders of file of the Corporate’s usual stocks traded at the Toronto Retain Change.

Dividends are payable in United States bucks. Shareholders in alternative jurisdictions can elect to take part in Computershare’s world bills provider in the event that they need to obtain dividends in an supplementary forex. This dividend qualifies as an ‘eligible dividend’ for Canadian source of revenue tax functions.

Effects Evaluation

^{† See “Non-IFRS Financial Information”}

Convention Name and Webcast:

Senior control will host a convention name and webcast to speak about the quarterly effects on Thursday, November 6, 2025 at 10:00 am EST (7:00 am PST). To take part within the convention name, please worth certainly one of please see modes:

Webcast: https://app.webinar.net/edmQZrLXkro
Toll-free North The united states: +1 888-510-2154
World: +1 437-900-0527

If you’re not able to wait the decision, a recording will probably be made to be had at the Corporate’s web site.

About OceanaGold 

OceanaGold is a rising intermediate gold and copper manufacturer dedicated to soundly and responsibly maximizing the life of Isolated Money Stream from our operations and turning in robust returns for our shareholders. We’ve got a portfolio of 4 working mines: the wholly-owned Haile Gold Mine in the USA of The united states; the wholly-owned Macraes and Waihi operations in Brandnew Zealand; and the 80%-owned Didipio Mine within the Philippines.

Cautionary Observation for Population Drop 

This family leave incorporates positive “forward-looking statements” and “forward-looking information” (jointly, “forward-looking statements”) inside the which means of acceptable Canadian securities rules which would possibly come with, however isn’t restricted to, statements with admire to the year monetary and working efficiency of the Corporate, its mining initiatives, the year worth of gold, the estimation of mineral reserves and mineral sources, the belief of mineral secure and useful resource estimates, prices of manufacturing, estimates of preliminary capital, maintaining capital, working and exploration expenditures, prices and timing of the advance of untouched deposits, prices and timing of the advance of untouched mines, prices and timing of year exploration and drilling techniques, timing of submitting of up to date technical knowledge, expected manufacturing quantities, necessities for spare capital, governmental law of mining operations and exploration operations, timing and receipt of approvals, is of the same opinion and lets in below acceptable regulation, environmental dangers, identify disputes or claims, barriers of insurance plans and the timing and imaginable end result of pending litigation and regulatory issues. All statements on this family leave that cope with occasions or tendencies that we predict to happen going forward are forward-looking statements. Ahead-looking statements are statements that aren’t ancient details and are usually, even though now not at all times, known via phrases similar to “may”, “plans”, “expects”, “projects”, “is expected”, “scheduled”, “potential”, “estimates”, “forecasts”, “intends”, “targets”, “aims”, “anticipates” or “believes” or diversifications (together with unfavorable diversifications) of such phrases and words, or could also be known via statements to the impact that positive movements, occasions or effects “may”, “could”, “would”, “should”, “might” or “will” be taken, happen or be accomplished.

Ahead-looking statements contain recognized and unknown dangers, uncertainties and alternative elements which would possibly purpose the unedited effects, efficiency or achievements of the Corporate to be materially other from any year effects, efficiency or achievements expressed or implied via the forward-looking statements. Such dangers come with, amongst others: year costs of gold; common industry; financial and marketplace elements (together with adjustments in world, nationwide or regional monetary, credit score, forex or securities markets); adjustments or tendencies in world, nationwide or regional political and social statuses; adjustments in rules (together with tax rules) and adjustments in IFRS or regulatory accounting necessities; the unedited result of stream manufacturing, construction and/or exploration actions; conclusions of financial opinions and research; fluctuations within the price of the USA greenback relative to the Canadian greenback, the Australian greenback, the Philippines Peso or the Brandnew Zealand greenback; adjustments in mission parameters as plans proceed to be subtle; imaginable diversifications of ore grade or fix charges; failure of plant, apparatus or processes to perform as expected; injuries, labour disputes and alternative dangers of the mining trade; political instability or rebel or warfare; labour pressure availability and yield; hostile judicial selections, incapability or delays in acquiring financing or governmental approvals; incapability or delays within the final touch of construction or development actions or within the re-commencement of operations; criminal demanding situations to mining and working lets in together with the FTAA in addition to the ones elements known and described in additional attribute within the category entitled “Risk Factors” contained within the Corporate’s most up-to-date Annual Data Method and the Corporate’s alternative filings with Canadian securities regulators, which might be to be had on SEDAR+ at sedarplus.com  below the Corporate’s identify. The record isn’t exhaustive of the standards that can have an effect on the Corporate’s forward-looking statements.

The Corporate’s forward-looking statements are in line with the acceptable guesses and elements Control considers cheap as of the moment hereof, in line with the guidelines to be had to Control at such occasion. Those guesses and elements come with, however aren’t restricted to, guesses and elements homogeneous to: the Corporate’s talent to hold on stream and year operations, together with: construction and exploration actions; the timing, extent, length and financial viability of such operations, together with any mineral sources or reserves known thereby; the accuracy and reliability of estimates, projections, forecasts, research and exams; the Corporate’s talent to satisfy or succeed in estimates, projections and forecasts; the supply and value of inputs; the fee and marketplace for outputs, together with gold; foreign currency charges; taxation ranges; the well timed receipt of important approvals or lets in; the facility to satisfy stream and year duties; the facility to procure well timed financing on cheap phrases when required; the stream and year social, financial and political statuses; and alternative guesses and elements usually related to the mining trade.

The Corporate’s forward-looking statements are in line with the critiques and estimates of Control and replicate their stream expectancies relating to year occasions and working efficiency and discuss simplest as of the moment hereof. The Corporate does now not think any legal responsibility to replace forward-looking statements if instances or Control’s ideals, expectancies or critiques must alternate alternative than as required via acceptable regulation. There can also be incorrect promise that forward-looking statements will turn out to be correct, and unedited effects, efficiency or achievements may fluctuate materially from the ones expressed in, or implied via, those forward-looking statements. Accordingly, incorrect promise can also be for the reason that any occasions expected via the forward-looking statements will transpire or happen, or if any of them do, what advantages or liabilities the Corporate will derive therefrom. For the explanations poised forth above, undue reliance must now not be put on forward-looking statements.

Non-IFRS Monetary Data

Adjusted Web Benefit/(Loss) and Adjusted Income/(Loss) in line with proportion

Those are worn via Control to measure the underlying working efficiency of the Corporate. Control believes those measures grant knowledge that comes in handy to traders as a result of they’re noteceable signs of the power of the Corporate’s operations and the efficiency of its core industry. Accordingly, such measures are supposed to grant spare knowledge and must now not be regarded as in isolation as an alternative choice to measures of efficiency ready in response to IFRS. Adjusted Web Benefit/(Loss) is calculated as Web Benefit/(Loss) much less the have an effect on of impairment bills, write-downs, foreign currency (features)/losses, acquire on sale of property, OGP list prices and restructuring prices homogeneous to transitioning positive company actions from Australia to Canada.

Please see desk supplies a reconciliation of Adjusted Web Benefit/(Loss) and Adjusted Income/(Loss) in line with proportion:

EBITDA and Adjusted EBITDA

Control believes that Adjusted EBITDA is a worthy indicator of its talent to generate liquidity via generating working money flows to charity operating capital wishes, provider debt duties and charity capital expenditures. EBITDA is outlined as income earlier than hobby, tax, depreciation and amortization. Adjusted EBITDA is calculated as EBITDA much less the have an effect on of impairment bills, write-downs, features/losses on disposal of property, OGP list prices, foreign currency features/losses and alternative non-recurring prices. EBITDA Margin is calculated as EBITDA divided via income.

Previous to the primary quarter of 2024, Adjusted EBITDA used to be calculated the use of an adjustment for a particular portion of unrealized foreign currency features/losses instead than the overall foreign currency acquire/loss. The comparative quarters were recalculated adjusting for all foreign currency features/losses.

Please see desk supplies a reconciliation of EBITDA, Adjusted EBITDA and EBITDA Margin:

Money Prices and AISC

Money Prices are a usual monetary efficiency measure within the gold mining trade; alternatively, it has incorrect usual which means below IFRS. Control makes use of this measure to watch the efficiency of its mining operations and its talent to generate certain money flows, each on a person website foundation and an total corporate foundation. Money Prices come with mine website working prices plus oblique taxes and promoting price internet of derivative gross sales and are after divided via oz offered. In calculating Money Prices, the Corporate contains copper and silver derivative credit because it considers the fee to build the gold is decreased because of the derivative gross sales incidental to the gold manufacturing procedure, thereby permitting Control and alternative stakeholders to evaluate the online prices of gold manufacturing. The measure isn’t essentially indicative of money tide from operations below IFRS or working prices offered below IFRS.

Control believes that the AISC measure supplies spare perception into the prices of manufacturing gold via shooting the entire expenditures required for the invention, construction and maintaining of gold manufacturing and permits the Corporate to evaluate its talent to assistance capital expenditures to maintain year manufacturing from the life of working money flows, each on a person website foundation and an total corporate foundation, month keeping up stream manufacturing ranges. Control believes that, along with typical measures ready in response to IFRS, positive traders worth this knowledge to judge the Corporate’s efficiency and talent to generate money tide in line with ounce offered. AISC is calculated because the sum of Money Prices, capital expenditures and exploration prices which are maintaining in nature and company G&A prices. AISC is split via oz offered to reach at AISC in line with ounce.

Previous to the primary quarter of 2025, Didipio’s AISC calculation excluded native company G&A prices which is in keeping with the calculation of AISC for the alternative operations. To bring to align the Corporate’s reporting of AISC with native reporting necessities within the Philippines, Control has incorporated native company G&A prices in Didipio’s AISC calculation starting within the first quarter of 2025.

Please see desk supplies a reconciliation of consolidated Money Prices and AISC:

Please see tables supplies a reconciliation of Money Prices and AISC for each and every operation:

Haile

Didipio

Macraes

Waihi

Web Money/(Debt)

Web Money/(Debt) has been calculated as general debt much less money and money equivalents. Control believes this can be a helpful indicator to be worn along with alternative liquidity and leverage ratios to evaluate the Corporate’s monetary condition. Previous to 2024, rent liabilities have been incorporated within the calculation of Web Money/(Debt). The alternate in admire of 2024 is in keeping with the usually followed way to the calculation of Web Money/(Debt). The comparative quarters were recalculated with the exception of rent liabilities.

Please see desk supplies a reconciliation of Web Money/(Debt):

Working Money Stream in line with proportion

Working Money Stream in line with proportion earlier than operating capital actions is calculated as the money flows supplied via working actions adjusted for adjustments in operating capital after divided via the totally diluted adjusted weighted moderate choice of usual stocks issued and exceptional.

Please see desk supplies a reconciliation of general totally diluted Working Money Stream in line with proportion:

Isolated Money Stream

Isolated Money Stream has been calculated as money flows from working actions, much less money tide worn in making an investment actions. Control believes Isolated Money Stream is an invaluable indicator of the Corporate’s talent to generate money tide and perform internet of all expenditures, previous to any financing money flows. Isolated Money Stream in line with proportion is calculated because the Isolated Money Stream divided via the totally diluted adjusted weighted moderate choice of usual stocks issued and exceptional.

Please see desk supplies a reconciliation of Isolated Money Stream:

SOURCE OceanaGold Company