Record Date for the purpose of Final Dividend (if approved by Shareholders) will be Wednesday, September 09, 2026

Date: 12th August, 2026 To, To, National 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, NSE Scrip Symbol: KRONOX Mumbai - 400 001 BSE Scrip Code: 544187 Subject: Disclosure of Book Closure and Record Date Pursuant to Regulation 42 of the Securities and Exchange Board of India (Listing Obligations and Disclosure Requirements) Regulations, 2015, we wish to inform you that the Register of Members and Share Transfer Books of the Company will remain closed from Thursday, September 10, 2026, to Wednesday, September 16, 2026, (both days inclusive) for the purposes of payment of final dividend for the financial year 2025-26, if approved by the members at the 17th Annual General meeting (AGM) of the Company scheduled to be held on Wednesday, 16th September, 2026. The schedule for Book Closure and Record Date is as per below table. Type Book Closure SYMBOL of (Both Days Inclusive) Record Date Purpose Security From To BSE-531067 Equity Thursday, Wednesday, Wednesday, 17TH AGM NSE- KRONOX Shares September 10, September 16, September 09, 2026 2026 2026 This is for your information and further dissemination. Thanking you, Yours Faithfully For KRONOX Lab Sciences Limited Nikhil Goswami Company Secretary & Compliance O(cid:431)icer Membership No. A68272