Closure of Trading Window from October 01, 2026 for the quarter ended September 30, 2026

® The Corporate Office: T: +9144 4566 1700 l ‘ V\_Iatgrbase Thapar House | 37 Montieth Road www.waterbaseindia.com -~ lelted Egmore | Chennai | 600 008 | India September 24, 2026 The Manager, Listing Department, BSE Limited, Phiroze Jeejeebhoy Towers, Dalal Street, Mumbai- 400 001 Ref: Scrip Code: 523660 / WATERBASE Dear Sir/Madam, Sub: Intimation of closure of Trading Window We wish to inform you that pursuant to the Company's Code of Conduct for Prohibition of Insider Trading, the Trading Window for dealing in the securities of the Company will remain closed from October 01, 2026 in connection with the proposed publication of unaudited financial results of the Company for the quarter and half year ending September 30, 2026. The Trading Window will open 48 hours after the said financial results are declared to the Stock Exchange. Kindly take the above information on your record For The Waterbase Limited f n«JJ(”{N R Sureshkumar Company Secretary & Compliance officer Registered Office / Factory: Ananthapuram Village | T.P. Gudur Mandal | Nellore | Andhra Pradesh | 524 344 T: +9170759 33457 | E: info@waterbaseindia.com | CIN: LOSO05AP1987PLCO18436