Intimation of closure of Trading Window for the quarter and half year ended 30th September, 2026.

Birla Corporation Limited Corporate Office: 1, Shakespeare Sarani, A.C. Market (2nd Floor), Kolkata 700 071 P: 033 6603 3300-02 F: +91 332288 4426 E: Coordinator@birlacorp.com 25th September, 2026 BSE Limited National Stock Exchange of India Ltd. Phiroze Jeejeebhoy Towers, ‘Exchange Plaza’, C-1, Block G, Dalal Street, Bandra-Kurla Complex, Bandra (East) Mumbai- 400 001 Mumbai- 400 051 Scrip Code: 500335 Scrip Symbol: BIRLACORPN Dear Sir(s), Sub: Closure of Trading Window Pursuant to the provisions of SEBI (Prohibition of Insider Trading) Regulations, 2015 and the Company’s ‘Internal Code of Conduct to Regulate, Monitor and Report Trading by Designated Persons’, we wish to inform you that the Trading Window for dealing in the securities of the Company shall remain closed for all the Designated Persons and their immediate relatives with effect from 1st October, 2026 till 48 hours after the announcement to the Stock Exchanges of the Unaudited Standalone and Consolidated Financial Results of the Company for the quarter and half year ended 30th September, 2026. This is for your information and record. Thanking you, Yours faithfully, For BIRLA CORPORATION LIMITED (MANOJ KUMAR MEHTA) Company Secretary & Legal Head Registered Office: Birla Building, 9/1 R. N. Mukherjee Road, Kolkata-700001 | CIN: L01132WB1919PLC003334 | | www.birlacorporation.com| P: 033 6616 6745/6826; +91 33 2248 2872/7983