Letter attached

September 28, 2026 The Manager The Manager Listing Department Listing Department BSE Limited National Stock Exchange of India Limited Phiroze Jeejeebhoy Towers Exchange Plaza, C-1, Block G Dalal Street Bandra Kurla Complex, Bandra (East) Mumbai 400 001 Mumbai 400 051 Through: BSE Listing portal Through: NEAPS Scrip code: 500027 Symbol: ATUL Dear Sir, Meeting of the Board of Directors and trading window closure Pursuant to Regulation 29 of the Securities and Exchange Board of India (Listing Obligations and Disclosure Requirements) Regulations, 2015, please note that the meeting of the Board of Directors of the Company will be held on Friday, October 23, 2026, inter alia, to consider unaudited standalone and consolidated financial results for the quarter | six months ending on September 30, 2026. Further, pursuant to the Securities and Exchange Board of India (Prohibition of Insider Trading) Regulations, 2015, trading window for trading in securities of the Company will remain closed from October 01, 2026 to October 25, 2026 (both days inclusive). We request you to inform the members of the exchange accordingly. Thank you, Yours faithfully For Atul Limited Lalit Patni Company Secretary and Chief Compliance Officer