SECURITIES AND EXCHANGE COMMISSIONSEC FORM 18-A

REPORT BY OWNER OF MORE THAN FIVE PERCENT

Check the appropriate box:

Initial Filing

Amendment

Item/s amended by the Filing N/A

1. Exact Name of Registrant as Specified in its Charter

MAYNILAD WATER SERVICES, INC.

a. Address of Principal Offices

Maynilad Building, MWSS Complex, Katipunan Avenue, Pansol, 1119 Quezon City Postal Code 1119

b. SEC Identification Number

A199611651

c. Industry Classification Code(SEC Use Only)

d. BIR Tax Identification No.

005-393-442

2. Name of Reporting Person

Asian Development Bank

a. Address of Principal Offices

6 ADB Avenue, Mandaluyong City, Metro Manila, Philippines Postal Code 1550

b. Telephone Number of Reporting Person

+63 2 8632 4444

c. Citizenship or Place of Organization of Reporting Person

N/A

Name, Address and Telephone Number of person authorized to receive notices and communications if reporting person is a partnership, corporation or other legal entity

Name: Joseph Bergin; Address: 6 ADB Avenue, Mandaluyong City, Metro Manila, Philippines, 1550; Telephone Number: +63 2 8632 4444

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 17-8 - Report by Owner of More Than Five Percent
References: SRC Rule 18
and Section 17.5 of the Revised Disclosure Rules

Description of the Disclosure
Please refer to the attached SEC Form 18-A.