The Trading Window of securities of Star Delta Transformers Limited will be closed from 01st October, 2026 till 48 hours from the declaration of Un-audited Standalone Financial Results of 2nd Quarter and Half Year ended 30th September, 2026.

STAR DELTA TRANSFORMERS LIMITED CIN: L31102MP1977PLC001393 REGD. OFFICE: 92-A, INDUSTRIAL AREA, GOVINDPURA, BHOPAL-462023 (M.P) INDIA TEL.: (0) 0755-2586680, 4261016, 2587343, 4261003, FAX: (0755)2580059 Email Id: star.delta@rediffmail.com, Website: www.stardeltatransformers.com Date: September 25th, 2026 M/s BSE Limited, Listing Department, Phiroze Jeejeebhoy Towers, Dalal Street, Mumbai- 400001 Phones: 91-22-22721233/4 Email:corp.relations@bseindia.com SCRIP CODE: 539255 Sub: Intimation of closure of trading window. Dear Sir/Madam, This is to inform you that as per the Company’s Code of Conduct for Prohibition of Insider Trading, framed pursuant to the Securities and Exchange Board of India (Prohibition of Insider Trading) Regulations, 2015, the Trading Window for dealing in the securities of the Company shall remain closed with effect from Thursday, 1st October, 2026 till 48 (Forty-eight) hours after the declaration of Un-audited Standalone Financial Results of the Company for 2nd Quarter & Half Year ended September 30th, 2026. Accordingly, all the insiders (including designated Persons) and their immediate relatives and others who have come in to the receipt of any insider information as to agenda of the meeting either accidently or otherwise are hereby directed not to deal in shares of the Company during the period of closure of trading window as stated above. Kindly take the above information on your records. Thanking you, Yours faithfully For Star Delta Transformers Limited Devyanshu Tiwari Company Secretary & Compliance Officer