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Manila Water Company, Inc.MWC

PSE Disclosure Form 17-12-A - List of Top 100 Stockholders (Common Shares) Reference: Section 17.12 of the Revised Disclosure Rules

Type of Securities

• Common

For the period ended	Sep 30, 2026

Description of the Disclosure
In compliance with Article VII, Section 17.12 of the Revised Disclosure Rules of the Exchange, we submit herewith the list of the Top 100 Stockholders of Manila Water Company, Inc. as of September 30, 2026. The additional information that we are required to disclose may be found on the attached Table of Comparison of Figures as of 30 June 2026 and as of 30 September 2026.

Number of Issued Common Shares	2,885,795,897
Number of Treasury Common Shares, if any	279,885,725
Number of Outstanding Common Shares	2,605,910,172
Number of Listed Common Shares	2,045,672,745
Number of Lodged Common Shares	1,280,977,569
PCD Nominee - Filipino	911,773,332
PCD Nominee - Non-Filipino	369,204,237
Number of Certificated Common Shares	1,604,818,328

Change from previous submission
Please see attached summary of changes from previous submission.