Document

SD 1 a2026-06x03ogcx2025formsd.htm SD Document

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM SD

Specialized Disclosure Report

OceanaGold Corporation

(Exact name of registrant as specified in its charter)

British Columbia, Canada

001-43215

98-1593514

(State or other jurisdiction of incorporation or organization)

(Commission File Number)

(IRS Employer

Identification No.)

Suite 1020, 400 Burrard Street

Vancouver, British Columbia

Canada

V6C 3A6

(Address of principal executive offices)

(Zip Code)

Elizabeth Thampy

(604) 678-4127

(Name and telephone number, including area code, of person to contact in connection with this report)

Check the appropriate box to indicate the rule pursuant to which this form is being filed, and provide the period to which the information in this form applies:

☐Rule 13p-1 under the Securities Exchange Act (17 CFR 240.13p-1) for the reporting period from January 1 to December 31, .

☒ Rule 13q-1 under the Securities Exchange Act (17 CFR 240.13q-1) for the fiscal year ended December 31, 2025.

SECTION 1 – CONFLICT MINERALS DISCLOSURE

Item 1.01 - Conflict Minerals Disclosure and Report

Not applicable.

Item 1.02 - Exhibit

Not applicable.

SECTION 2 – RESOURCE EXTRACTION ISSUER DISCLOSURE

Item 2.01 Resource Extraction Issuer Disclosure and Report

OceanaGold Corporation (the “Company”) is subject to Canada’s Extractive Sector Transparency Measures Act (“ESTMA”). The Company is relying on the alternative reporting provision of Item 2.01 and providing its ESTMA report for the year ended December 31, 2025 to satisfy the requirements of Item 2.01. The Company’s ESTMA report is available on the Company’s website at https://oceanagold.com/investors/results-and-filings or on the Government of Canada’s website at https://natural-resources.canada.ca/minerals-mining/services-mining-industry/extractive-sector-transparency/links-estma-reports. The payment disclosure required by Form SD is included as Exhibit 2.01 to this Form SD.

SECTION 3 – EXHIBITS

Item 3.01. Exhibits

The following exhibit is filed as part of this report.


Exhibit Number						Description

2.01						Extractive Sector Transparency Measures Act – Annual Report for the year ended December 31, 2025

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.

OCEANAGOLD CORPORATION

By:

/s/ Marius van Niekerk

June 3, 2026

Name:

Marius van Niekerk

(Date)

Title:

Executive Vice President,

Chief Financial Officer

SEC Form SD filed by OceanaGold Corporation