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)

Jul 7, 2023

2. SEC Identification Number

0000091447

3. BIR Tax Identification No.

000190324000

4. Exact name of issuer as specified in its charter

SEMIRARA MINING AND POWER CORPORATION

5. Province, country or other jurisdiction of incorporation

Philippines

6. Industry Classification Code(SEC Use Only)

7. Address of principal office

2/F DMCI Plaza, 2281 Don Chino Roces Avenue, Makati City Postal Code 1231

8. Issuer's telephone number, including area code

632-88883000

9. Former name or former address, if changed since last report

9

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	4,250,547,620

11. Indicate the item numbers reported herein

9

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.

Semirara Mining and Power CorporationSCC

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
SLPGC Unit 1 Extended Outage
Background/Description of the Disclosure
Southwest Luzon Power Generation Corporation (SLPGC) is extending the unplanned outage of its Unit 1 that initially occurred at noon on June 17, 2023. The plant outage was caused by turbine tripping, which resulted from high axial displacement—an excessive movement of the turbine along its spinning axis. SLPGC Plant Management is still investigating the cause of the excessive turbine movement, including a detailed inspection of the turbine component. Repair work and return to service are targeted before the end of August. The insurance brokers and adjusters of SLPGC have been informed of the matter and are currently working with Plant Management to process the filing of the insurance claims. Coordination with power industry regulators and other key stakeholders are likewise underway.
Other Relevant Information
In accordance with SEC Notice issued on March 17, 2020, attached herewith is SEC Form 17-C for your immediate reference.