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

• Common

For the period ended	Dec 31, 2025

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	437,235,450
PCD Nominee - Filipino	129,133,831
PCD Nominee - Non-Filipino	308,101,619
Number of Certificated Common Shares	1,842,764,550

Change from previous submission

The changes from previuos quarter submission are on the following: 1. Number of Lodged Common Shares - from 447,833,500 (as of 30 September 2025) to 437,235,450 (as of 31 December 2025); 2. PCD Nominee Filipino - from 139,835,360 (as of 30 September 2025) to 129,133,831 (as of 31 December 2025); 3. PCD Nominee - Non-Filipino - from 307,998,140 (as of 30 September 2025) to 308,101,619 (as of 31 December 2025); and 4. Number of Certificated Common Shares - from 1,832,166,500 (as of 30 September 2025) to 1,842,764,550 (as of 31 December 2025).