SECURITIES AND EXCHANGE COMMISSIONSEC FORM 18-A

REPORT BY OWNER OF MORE THAN FIVE PERCENT

Check the appropriate box:

Initial Filing

Amendment

Item/s amended by the Filing N/A

1. Exact Name of Registrant as Specified in its Charter

ORIENTAL PETROLEUM AND MINERALS CORPORATION

a. Address of Principal Offices

34th Floor, Robinsons Equitable Tower, ADB Ave. Ortigas Center, Pasig City Postal Code 1600

b. SEC Identification Number

40058

c. Industry Classification Code(SEC Use Only)

d. BIR Tax Identification No.

000-483-747-000

2. Name of Reporting Person

JG SUMMIT HOLDINGS, INC.

a. Address of Principal Offices

43Flr. Robinsons Equitable Tower, ADB Ave. corner Poveda St., Ortigas Center, Pasig City, Philippines Postal Code 1605

b. Telephone Number of Reporting Person

(632) 8633-7631 to 40

c. Citizenship or Place of Organization of Reporting Person

Philippines

Name, Address and Telephone Number of person authorized to receive notices and communications if reporting person is a partnership, corporation or other legal entity

Maria Celia H. Fernandez-Estavillo, Position, Chief Legal Officer and Corporate Secretary;Telephone:(632) 8633-7631 to 40

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.

Oriental Petroleum and Minerals CorporationOPM

PSE Disclosure Form 17-8 - Report by Owner of More Than Five Percent
References: SRC Rule 18
and Section 17.5 of the Revised Disclosure Rules

Description of the Disclosure

Please refer to the attached SEC Form 18-A filed by JG Summit Holdings, Inc. (JGS), reporting its acquisition of 37,051,952,896 common shares of Oriental Petroleum and Mineral Corporation (OPMC) from its wholly owned subsidiary, JG Summit Capital Services Corp. (JGSCSC), on October 26, 2026. Following the acquisition, JGS became the beneficial owner of 38,808,201,737 common shares, representing 20.24% of OPMC's 191,728,900,000 outstanding shares. For details, please refer to the attached SEC Form 18-A.