Please find enclosed the details of trading window closure for the Quarter and Half year ended 30th September, 2026

24th September, 2026 BSE Limited National Stock Exchange of India Limited Phiroze JeeJeebhoy Towers, Exchange Plaza, Plot no. C/1, Dalal Street, G Block, Bandra-Kurla Complex Fort, Mumbai – 400 001 Bandra (E), Mumbai - 400 051 Scrip Code: 543318 Trading Symbol: CLEAN Subject: Intimation of Closure of Trading Window for the Quarter and Half year ended 30th September, 2026. Dear Sir/Madam This is to inform that, pursuant to the provisions of the SEBI (Prohibition of Insider Trading) Regulations, 2015 and the Company’s Code of Conduct for Regulation and Monitoring Insider Trading, the trading window for dealing in the equity shares of the Company by designated persons, will remain closed from Thursday, 1st October, 2026 upto the completion of 48 hours after the declaration of the Un-audited Financial Results of the Company for the Quarter and Half year ended 30th September, 2026. The date of the Board Meeting to be held for consideration and approval of the Un-audited Financial Results for the Quarter and Half year ended 30th September, 2026 shall be communicated in due course of time. Accordingly, all the Designated Persons, their immediate relatives, Connected Persons and other Insiders of the Company are advised not to deal in the Equity Shares of the Company during the aforesaid period. Request you to take the same on record. Thanking You. Yours faithfully, For Clean Science and Technology Limited Ruchita Vij Company Secretary & Compliance Officer