Closure of Trading Window for the Quarter and half year ending September, 2026

Date: September 29, 2026 To, To, Na(cid:415)onal Stock Exchange of India Limited BSE Limited Exchange Plaza, C-1 Block G, 25th Floor, Bandra Kurla Complex Phiroze Jeejeebhoy Towers, Bandra [E], Mumbai – 400051 Dalal Street, Fort, Mumbai - 400 001 NSE Scrip Symbol: KRONOX BSE Scrip Code: 544187 Subject: Closure of Trading Window In compliance of SEBI (Prohibi(cid:415)on of Insider Trading) Regula(cid:415)ons, 2015, as amended, we hereby inform that the Trading Window (for sale, purchase and dealing in Company's Equity Shares) will remain closed from Thursday, 1st October, 2026 for all designated persons as defined under the Company’s Code of Conduct to Regulate, Monitor and Report Trading by Insiders. The Trading Window will open 48 hours a(cid:332)er the announcement to the Stock Exchange of the Unaudited Financial Results of the Quarter and Half Year ending on 30th September, 2026 by the Board of Directors in upcoming Board Mee(cid:415)ng. We shall communicate the date of Board Mee(cid:415)ng in due course. You are requested to oblige us by taking the aforesaid informa(cid:415)on on your record. Thanking you, Yours faithfully, For KRONOX LAB SCIENCES LIMITED Nikhil Goswami Company Secretary & Compliance Officer Membership No. A68272