CR07835-2026

The Exchange does not warrant and holds no responsibility for the veracity of the facts and representations contained in all corporate disclosures, including financial reports. All data contained herein are prepared and submitted by the disclosing party to the Exchange, and are disseminated solely for purposes of information. Any questions on the data contained herein should be addressed directly to the Corporate Information Officer of the disclosing party.

OceanaGold (Philippines), Inc.OGP

PSE Disclosure Form 17-6 - Initial Statement of Beneficial Ownership of Securities References: SRC Rule 23 and
Section 17.5 of the Revised Disclosure Rules

Name of Reporting Person Joannah Marie V. Salamat
Date of Event Requiring Statement Nov 4, 2026
Relationship of Reporting Person to Issuer Officer
Description of the Disclosure

Please see attached SEC Form 23-A (Initial Statement of Beneficial Ownership of Securities) for Joannah Marie V. Salamat following her election on 4 November 2026 as Assistant Corporate Secretary and as disclosed to the PSE on https://edge.pse.com.ph/openDiscViewer.do?edge_no=0b1da8e1c0848d1664d70b69f0a3140b.

Filed on behalf by:
Name Dyann Rabaya
Designation Principal - Compliance and Business Integrity