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 22, 2026

2. SEC Identification Number

A199611593

3. BIR Tax Identification No.

005-038-428-000

4. Exact name of issuer as specified in its charter

MANILA WATER COMPANY, INC.

5. Province, country or other jurisdiction of incorporation

Quezon City, Philippines

6. Industry Classification Code(SEC Use Only)

7. Address of principal office

MWSS Administration Building, No. 489 Katipunan Road, Balara, Quezon City Postal Code 1105

8. Issuer's telephone number, including area code

09171547921

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

Not Applicable

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 Shares	2,607,760,172
Preferred Shares	3,563,756,068

11. Indicate the item numbers reported herein

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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.

Manila Water Company, Inc.MWC

PSE Disclosure Form 4-8 - Change in Directors and/or Officers
(Resignation/Removal or Appointment/Election)
References: SRC Rule 17 (SEC Form 17-C) and
Section 4.4 of the Revised Disclosure Rules

Subject of the Disclosure
Change in Chairperson of Audit and Board Risk Oversight Committees
Background/Description of the Disclosure
Please be informed that the Board of Directors of Manila Water Company, Inc. (“MWC”) approved the reorganization of the Audit and Board Risk Oversight Committees such that the Audit Committee shall now be chaired by Mr. Eric Ramon O. Recto while the Board Risk Oversight Committee shall be chaired by Mr. Octavio Victor R. Espiritu. The composition of said committees effective October 21, 2026 shall be as follows: Audit Committee Eric Ramon O. Recto (Independent Director) Chairperson Diosdado M. Peralta (Independent Director) Member Paquito N. Ochoa, Jr. (Independent Director) Member Stephen George A. Paradies Member Board Risk Oversight Committee Octavio Victor R. Espiritu (Independent Director) Chairperson Paquito N. Ochoa, Jr. (Independent Director) Member Diosdado M. Peralta (Independent Director) Member Donato C. Almeda Member

Resignation/Removal or Replacement

Name of Person	Position/Designation	Effective Date of Resignation/Cessation of term (mmm/dd/yyyy)	Reason(s) for Resignation/Cessation
N/A	N/A	N/A	N/A

Election or Appointment

Name of Person	Position/Designation	Date of Appointment/Election (mmm/dd/yyyy)	Effective Date of Appointment Election (mmm/dd/yyyy)	Shareholdings in the Listed Company		Nature of Indirect Ownership
				Direct	Indirect
N/A	N/A	N/A	N/A	-	-	N/A

Promotion or Change in Designation

Name of Person	Position/Designation		Date of Approval (mmm/dd/yyyy)	Effective Date of Change (mmm/dd/yyyy)	Shareholdings in the Listed Company		Nature of Indirect Ownership
	From	To			Direct	Indirect
Eric Ramon O. Recto	Chairperson of Board Risk Oversight Committee	Chairperson of Audit Comittee	Oct/21/2026	Oct/21/2026	1,000	9,000	PCD
Octavio Victor R. Espiritu	Chairperson of Audit Comittee	Chairperson of Board Risk Oversight Committee	Oct/21/2026	Oct/21/2026	1,000	188,300	PCD

Other Relevant Information
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