OceanaGold (OGC) releases 2025 sustainability report and names new CSO

Rhea-AI Filing Summary

OceanaGold Corporation has filed a Form 6-K highlighting the release of its 2025 Sustainability Report for the year ended December 31, 2025. The report covers performance in safety, health, people and culture, community and social performance, environment, tailings management and climate.

The company notes meaningful progress on sustainability while continuing to deliver gold production, including improved safety performance, strong community and economic contributions, and progress on decarbonization. OceanaGold also issued its first mandatory IFRS S2 climate-related disclosure and appointed David Bickerton as Executive Vice President and Chief Sustainability Officer effective April 1, 2026.

Key Figures

Operating mines: 4 mines Didipio ownership: 80% owned IFRS S2 climate disclosure: First mandatory report +1 more

4 metrics

Operating mines 4 mines Haile (USA), Macraes and Waihi (New Zealand), Didipio (Philippines)

Didipio ownership 80% owned Didipio Mine in the Philippines

IFRS S2 climate disclosure First mandatory report Climate-related governance, strategy, risk, metrics and targets

CSO appointment effective date April 1, 2026 David Bickerton named Executive Vice President and Chief Sustainability Officer

Key Terms

Sustainability Report, IFRS S2 Climate-related Disclosure, tailings management, Free Cash Flow, +1 more

5 terms

Sustainability Report financial

"is pleased to publish its annual Sustainability Report for the year ended December 31, 2025"

A sustainability report is a document a company publishes that describes its environmental, social and governance practices, risks, and goals—essentially a report card on how the business impacts people and the planet. Investors use it to judge long-term risks and opportunities that don’t show up on the balance sheet, such as regulatory exposure, reputational damage or resource shortages; think of it like a building’s maintenance record that helps predict future repair costs and safety issues.

IFRS S2 Climate-related Disclosure regulatory

"first annual mandatory IFRS S2 Climate-related Disclosure, which provides information about the Company's approach"

tailings management technical

"progress across safety, health, people and culture, community and social performance, environment, tailings management, and climate"

Tailings management is the handling, storage and long-term oversight of the leftover crushed rock, slurry and process water produced by mining and mineral processing. Like keeping a safe, contained landfill for industrial waste, it matters to investors because poor practices can lead to costly cleanups, regulatory fines, operational shutdowns and lasting damage to asset value and company reputation, while good management reduces financial and legal risks over time.

Free Cash Flow financial

"committed to safely and responsibly maximizing the generation of Free Cash Flow from our operations"

Free cash flow is the amount of money a company has left over after paying all its expenses and investing in its business, like buying equipment or updating facilities. It shows how much cash is available to reward shareholders, pay down debt, or save for future growth. This helps investors understand if a company is financially healthy and able to grow.

Executive Vice President and Chief Sustainability Officer financial

"appointed David Bickerton as Executive Vice President and Chief Sustainability Officer (CSO) effective April 1, 2026"

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FAQ

What did OceanaGold (OGC) disclose in its latest Form 6-K?

OceanaGold disclosed the publication of its 2025 Sustainability Report. The report outlines performance across safety, health, people and culture, community, environment, tailings and climate, and includes the company’s first mandatory IFRS S2 climate-related disclosure for the year ended December 31, 2025.

What is highlighted in OceanaGold’s 2025 Sustainability Report?

The 2025 Sustainability Report highlights progress on safety performance, community and economic contributions, decarbonization efforts, and broader sustainability priorities. It also describes governance, strategy, risk management, and metrics and targets related to climate, consistent with OceanaGold’s first mandatory IFRS S2 climate-related disclosure.

What leadership change did OceanaGold (OGC) announce in this update?

OceanaGold announced the appointment of David Bickerton as Executive Vice President and Chief Sustainability Officer, effective April 1, 2026. He joined the company in 2011 and most recently served as Asset President of the Didipio Mine in the Philippines, bringing deep operational and cultural experience.

What is IFRS S2 climate-related disclosure mentioned by OceanaGold?

IFRS S2 climate-related disclosure is a reporting standard focused on climate risks and opportunities. OceanaGold’s first mandatory IFRS S2 report provides information on its climate-related governance, strategy, risk management, and metrics and targets, aligned with the company’s broader sustainability and decarbonization efforts.

Which mining assets are in OceanaGold’s operating portfolio?

OceanaGold operates four mines: the Haile Gold Mine in the United States, the Macraes and Waihi operations in New Zealand, and the 80%-owned Didipio Mine in the Philippines. These assets underpin the company’s gold and copper production and its focus on generating Free Cash Flow.

How does OceanaGold describe its sustainability approach in 2025?

OceanaGold describes embedding sustainability into daily operations as fundamental to creating and protecting stakeholder value. The company emphasizes improved safety, responsible gold production, community and economic contributions, and ongoing decarbonization initiatives as key aspects of its 2025 sustainability performance and long-term strategy.

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

REPORT OF FOREIGN PRIVATE ISSUER

Pursuant to Rule 13a-16 or 15d-16 of

the Securities Exchange Act of 1934

For the month of April, 2026 Commission File Number: 001-43215

OceanaGold Corporation

(Translation of registrant's name into English)

Suite 1020, 400 Burrard Street

Vancouver, British Columbia V6C 3A6

Canada

(Address of principal executive offices)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F.

Form 20-F ☐         Form 40-F ☒

EXHIBIT INDEX

Exhibit	Description
99.1	News Release dated April 29, 2026

FORM 6-K

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

	OceanaGold Corporation
DATE:  April 29, 2026	By:	/s/Liang Tang
	Name:	Liang Tang
	Title:	Executive Vice President, General Counsel and Company Secretary

Exhibit 99.1

 

OceanaGold Releases 2025 Sustainability Report

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

VANCOUVER, BC, April 29, 2026 /CNW/ - OceanaGold Corporation (TSX: OGC) (NYSE: OGC) ("OceanaGold" or the "Company") is pleased to publish its annual Sustainability Report for the year ended December 31, 2025. The report outlines OceanaGold's sustainability performance and progress across safety, health, people and culture, community and social performance, environment, tailings management, and climate.

Gerard Bond, President and Chief Executive Officer of OceanaGold, said "In 2025 we delivered another year of meaningful progress across our sustainability priorities, while continuing to safely and responsibly deliver gold production. Embedding sustainability into how we operate is fundamental to creating and protecting value for all stakeholders. Significant improvements in our safety performance, strong community and economic contributions, and progress on decarbonization reflect the focus and commitment of our teams across the business."

2025 Sustainability Performance Highlights

• Maintained MSCI "AA" ESG rating for the third consecutive year

• No workplace fatalities or life-altering injuries during the year, and a 36% reduction in Total Recordable Injury Frequency Rate compared to 2024

• Supported local economies and community development, spending $110M with nearly 800 local suppliers while contributing $10M to community projects

• 38% reduction in GHG emissions¹ over the last 3 years, with an aspiration of 30% absolute reduction in Greenhouse Gas emissions by 2030

• Averaging 60% water re-used or recycled across operating mine sites, and an updated water performance standard and site water management plans for all operating mine sites

The Company appointed David Bickerton as Executive Vice President and Chief Sustainability Officer (CSO) effective April 1, 2026. David brings a deep understanding of OceanaGold's business, culture and Company objectives to this critical role. David joined OceanaGold in 2011 and has held a broad range of roles across the business, most recently as Asset President of Didipio Mine in the Philippines.

1. OceanaGold sources the equivalent of 100% renewable energy, through the purchase of Renewable Energy Certificates (RECs).

This year is the release of the Company's first annual mandatory IFRS S2 Climate-related Disclosure, which provides information about the Company's approach and annual progress of climate-related governance, strategy, risk management and metrics and targets.

Links to OceanaGold's 2025 sustainability-related reports

• 2025 Sustainability Report

• 2025 Climate-related Disclosure (IFRS S2)

• 2025 Climate Transition Plan

• 2025 Sustainability Data Book

• 2025 Conflict-Free Gold Statement

• 2025 Responsible Gold Mining Principles Conformance Report

About OceanaGold

OceanaGold is a global 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 wholly-owned Haile Gold Mine in the United States of America; the wholly-owned Macraes and Waihi operations in New Zealand; and the 80%-owned Didipio Mine in the Philippines.

View original content to download multimedia:https://www.prnewswire.com/news-releases/oceanagold-releases-2025-sustainability-report-302757857.html

SOURCE OceanaGold Corporation

View original content to download multimedia: http://www.newswire.ca/en/releases/archive/April2026/29/c4179.html

%CIK: 0001487326

For further information: For further information please contact: Investor Relations: Rebecca Henare, VP, Investor Relations, Tel: +1 604-678-4095, ir@oceanagold.com; Valerie Burns, Manager, Investor Relations, Tel: +1 604-235-0742, ir@oceanagold.com; Media Relations: Louise Burgess, VP, Communications, Tel: +1 604-403-2019, media@oceanagold.com

CO: OceanaGold Corporation

CNW 16:30e 29-APR-26

Filing Exhibits & Attachments

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Press Releases

• EX-991 NEWS RELEASE DATED APRIL 29, 2026 10.7 KB