Intimation regarding closure of Trading Window

संदभ(cid:330)/Ref. : NBC/S/4.5 & 4.5(A)/2026/1384 िदनांक/Dated: 23.09.2026 To, To, (cid:366)बंधक/The Manager (cid:366)बंधक/The Manager Towers, National Stock Exchange of India Ltd., दलाल (cid:720)(cid:332)ीट/Dalal Street, ए(cid:411)च(cid:336)ज (cid:600)ाजा, बां(cid:363)ा-कु ला(cid:330) क(cid:817)(cid:600)े(cid:411), मु(cid:638)ई/MUMBAI- 400 001 Exchange Plaza, Bandra-Kurla Complex, (cid:304)(cid:716)प कोड/Scrip Code: 532234 बां(cid:363)ा ई(cid:720)/Bandra East, मु(cid:638)ई/MUMBAI-400 051 (cid:366)तीक/Symbol: NATIONALUM Trading Window. महोदय/Dear Sir, In pursuance of the SEBI (Prohibition of Insider Trading) Regulations, 2015 and the Company's Internal Code of Conduct for Prevention of Insider Trading, the trading window for dealing with the securities of the Company shall remain closed for all Insiders including Designated Persons and their immediate relatives from 1st October, 2026 and ends on 48 hours after the declaration of the unaudited financial results of the Company for the 2nd quarter and half year ending on 30th September, 2026 for the financial year 2026-27. The date of Board meeting for consideration of the unaudited financial results for the 2nd quarter and half year ending on 30th September, 2026 shall be intimated in due course. आपकी जानकारी और अिभलेख हेतु/ This is for your information and record ध(cid:586)वाद /Thanking you. भवदीय/Yours faithfully, For National Aluminium Co. Ltd. (बी. के . सा(cid:353))/ (B.K. Sahu) Company Secretary and Compliance Officer ACS: 9953 National Aluminium Company Limited (A Government of India Enterprise) REGD. & CORPORATE OFFICE Nalco Bhawan, Nayapalli, Bhubaneswar–751013,India CIN # L27203OR1981GOI000920 Tel.:0674-2301988-999, Ext.:2265, 2266, 2267, 2585, 2587, E-mail:company_secretary@nalcoindia.co.in,Website:www.nalcoindia.com