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

A1996-11651

3. BIR Tax Identification No.

005-393-442-000

4. Exact name of issuer as specified in its charter

MAYNILAD WATER SERVICES, INC.

5. Province, country or other jurisdiction of incorporation

Philippines

6. Industry Classification Code(SEC Use Only)

7. Address of principal office

Maynilad Building, MWSS Complex, Katipunan Avenue, Pansol, Quezon City Postal Code 1108

8. Issuer's telephone number, including area code

(+632) 8981-3483

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 Shares	7,402,603,600
Series A Blue Bonds Due 2029	9,000,000,000
Series B Blue Bonds Due 2034	6,000,000,000

11. Indicate the item numbers reported herein

Item No. 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.

Maynilad Water Services, Inc.MYNLD

PSE Disclosure Form 14-1 - Notice of Analysts'/Investors' Briefing References: Section 14 of the Revised Disclosure Rules

Subject of the Disclosure
Notice of Investors' and Analysts' Briefing
Background/Description of the Disclosure
Maynilad Water Services, Inc. will hold a hybrid Investors’ and Analysts’ Briefing on Thursday, 5 November 2026 at 4:00 p.m., Philippine Standard Time, to discuss the Company’s 2026 Nine-Month Financial and Operating Results.

Type of Briefing	Investors' and Analysts' Briefing
Subject of the Briefing	Financial and Operating Results for the Nine Months ended September 2026
Date of the Briefing	Nov 5, 2026
Time	4:00 p.m.
Venue	Edsa Shangri-La, Mactan Room and Online via Zoom
Contact Person	Josine Reyes
Contact Details	[email protected]

Other Relevant Information
Participants must register for the Meeting before 12:00 noon of 3 November 2026 (Tuesday) by completing the Registration Form. Link is included in the attachment.