Hindusthan Insulators & Industries Ltdhas informed BSE that the meeting of the Board of Directors of the Company is scheduled on 03/10/2026 ,inter alia, to consider and approve Un-audited Financial Results for the quarter and half year ending September 30, 2026

Date: September 28, 2026 The Listing Department, BSE Limited Phiroze Jeejeebhoy Towers, Dalal Street, Mumbai – 400001 Scrip Code: 539984 Subject: Intimation of Board Meeting in terms of the provisions of Regulation 29 of the SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015 Dear Sir/Ma’am, With reference to the captioned subject and in terms of the provisions of Regulation 29 of SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015, we would like to inform you that the meeting of the Board of Directors of Hindusthan Insulators & Industries Limited (‘the Company’), is scheduled to be held on Saturday, October 03, 2026, inter-alia, to consider and approve the Unaudited Financial Results of the Company for the quarter and half-year ending September 30, 2026. Further, in accordance with our intimation filed on September 25, 2026, the trading window for dealing in the securities of the Company shall continue to remain closed for designated persons and their immediate relatives from October 01, 2026 till October 05, 2026 (both days inclusive), in terms of the provisions of SEBI (Prohibition of Insider Trading) Regulations, 2015, and Company’s Code of Conduct to regulate, monitor and report trading by insiders. The aforesaid intimation is also being hosted on the website of the Company i.e., www.hindusthaninsulators.com This is for your information and records. Thanking You, Yours faithfully For Hindusthan Insulators & Industries Limited (Neha Kejriwal) Company Secretary & Compliance Officer M.No. F12381