Trading Window

Date: June 25, 2026 To, To, National Stock Exchange of India BSE Limited Limited 25th Floor, Exchange Plaza, C-1 Block G, Phiroze Jeejeebhoy Towers, Bandra Kurla Complex Dalal Street, Fort, Bandra [E], Mumbai – 400051 Mumbai - 400 001 NSE Scrip Symbol: KRONOX BSE Scrip Code: 544187 Subject: Closure of Trading Window In compliance of SEBI (Prohibition of Insider Trading) Regulations, 2015, as amended, we hereby inform that the Trading Window (for sale, purchase and dealing in Company's Equity Shares) will remain closed from Wednesday, 1st July, 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 after the announcement to the Stock Exchange of the Unaudited Financial Results of the Quarter ending on 30th June, 2026 by the Board of Directors in upcoming Board Meeting. We shall communicate the date of Board Meeting in due course. You are requested to oblige us by taking the aforesaid information on your record. Thanking you, Yours faithfully, For KRONOX LAB SCIENCES LIMITED Nikhil Goswami Company Secretary & Compliance O(cid:431)icer Membership No. A68272