C07516-2026

SECURITIES AND EXCHANGE COMMISSIONSEC FORM 17-C

CURRENT REPORT UNDER SECTION 17
OF THE SECURITIES REGULATION CODE
AND SRC RULE 17.2(c) THEREUNDER

1. Date of Report (Date of earliest event reported)
Oct 20, 2026
2. SEC Identification Number
40621
3. BIR Tax Identification No.
000-284-138
4. Exact name of issuer as specified in its charter
Apex Mining Co., Inc.
5. Province, country or other jurisdiction of incorporation
Philippines
6. Industry Classification Code(SEC Use Only)
7. Address of principal office
3304B West Tower, Tektite Towers, Exchange Road, Ortigas Center, Pasig City Postal Code 1605
8. Issuer's telephone number, including area code
(+02) 87062805
9. Former name or former address, if changed since last report
N/A
10. Securities registered pursuant to Sections 8 and 12 of the SRC or Sections 4 and 8 of the RSA
Title of Each Class Number of Shares of Common Stock Outstanding and Amount of Debt Outstanding
Common Share 6,227,887,491
11. Indicate the item numbers reported herein
Item 9. Other Events

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.

Apex Mining Co., Inc.APX

PSE Disclosure Form 4-30 - Material Information/Transactions References: SRC Rule 17 (SEC Form 17-C) and
Sections 4.1 and 4.4 of the Revised Disclosure Rules

Subject of the Disclosure

Offer of Prime Oil & Gas Inc. to acquire the 30% participating interest in Service Contract 72 of Monte Oro Resources & Energy Inc.

Background/Description of the Disclosure

Apex Mining Co. Inc. hereby disclose that its wholly owned subsidiary Monte Oro Resources & Energy Inc. (MOREI) has received an offer from Prime Oil & Gas Inc. to acquire MOREI’s 30% participating interest in Service Contract 72 (SC72) (the “Proposed Transaction”).

This offer is subject to: (a) a valuation exercise to determine the value of the asset and the consideration of the Proposed Transaction; (b) due diligence results; (c) mutually acceptable definitive agreement.

The Proposed Transaction will also be subject to the approval of the Department of Energy (DOE).

MOREI has engaged the services of an accredited third party professional valuer to assist in the determination of the value of the 30% participating interest in SC72.

SC72 is for exploration, development and exploitation of petroleum resources over an area of 8,800 sq. kms. and includes the Sampaguita Gas Field in the Recto Bank in the West Philippine Sea. Forum (GSEC 101) Ltd. holds the 70% participating interest and is the operator of the Service Contract.

Exploration work in SC72 was suspended in April 2022 following instructions from the DOE because of the geopolitical tension with China in the West Philippine Sea. A declaration of force majeure continues to-date.

Prime Oil & Gas Inc. is an indirect subsidiary of Prime Strategic Holdings Inc. which is also the parent company of Apex Mining Co. Inc.

Other Relevant Information

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Filed on behalf by:
Name Billy Torres
Designation SVP-CFO, Treasurer and Compliance Officer