CR05092-2026

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 17-12-A - List of Top 100 Stockholders (Common Shares) Reference: Section 17.12 of the Revised Disclosure Rules

Type of Securities

For the period ended Jun 30, 2026
Description of the Disclosure

OGP Top 100 Stockholders

Number of Issued Common Shares 2,280,000,000
Number of Treasury Common Shares, if any 0
Number of Outstanding Common Shares 2,280,000,000
Number of Listed Common Shares 2,280,000,000
Number of Lodged Common Shares 437,623,350
  PCD Nominee - Filipino 143,152,564
  PCD Nominee - Non-Filipino 294,470,786
Number of Certificated Common Shares 1,842,376,650
Change from previous submission

The changes from previous quarter submission are on the following:

1. Number of Lodged Common Shares - from 438,545,150 (as of March 31, 2026) to 437,623,350 (as of June 30, 2026); and
2. Number of Certificated Common Shares - from 1,841,454,850 (as of March 31, 2026) to 1,842,376,650 (as of June 30, 2026).

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