Certificate under SEBI (Depositories and Participants) Regulations, 2018

Date : 5th July, 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 Sub: Submission of Certificate under Regulation 74(5) of SEBI (Depositories and Participants) Regulations, 2018 Dear Sir/Madam, With reference to captioned subject, please find enclosed herewith the Certificate under Regulation 74(5) SEBI (Depositories and Participants) Regulations, 2018 for the quarter ended 30th June, 2026 received from M/s. Kfin Technologies Limited, Registrar and Share Transfer Agent of our Company. Kindly take the above submission on your record. Thanking you, Yours faithfully, For KRONOX LAB SCIENCES LIMITED Nikhil Goswami Company Secretary & Compliance O(cid:431)icer Membership No. A68272 KFIN/KROX/CDSL/74(5) E/1 Date: 01‐07‐2026 CENTRAL DEPOSITORY SERVICES (INDIA) LIMITED REGD OFF: MARATHON FUTUREX, A WING 25TH FLOOR NM JOSHI MARG LOWER PAREL (EAST) MUMBAI ‐ 400 023 Dear Sir(s), Sub: Certificate under Regulation 74(5) for the quarter ended June 30,2026 We as Registrar to an Issue and Share Transfer Agent of the KRONOX LAB SCIENCES LIMITED, certify that the details of securities dematerialized/rematerialized during the aforesaid period, as required under Regulation 74(5) of SEBI (Depositories and participants) Regulations 2018 have been furnished to all the Stock Exchanges where the shares of the company are listed. Thanking You Yours faithfully, for KFIN TECHNOLOGIES LIMITED SHARMILA HEMANT AMIN ASSISTANT VICE PRESIDENT CC TO: KRONOX LAB SCIENCES LIMITED BLOCK NO.138, VILLAGE EKALBARA PADRA VADODARA GUJARAT, INDIA 391440 KFIN/KROX/NSDL/74(5) E/1 Date: 01‐07‐2026 NATIONAL SECURITIES DEPOSITORY LIMITED TRADE WORLD 4TH FLOOR KAMALA MILLS COMPOUND SENAPATI BAPAT MARG LOWER PAREL MUMBAI ‐ 400 013 Dear Sir(s), Sub: Certificate under Regulation 74(5) for the quarter ended June 30,2026 We as Registrar to an Issue and Share Transfer Agent of the KRONOX LAB SCIENCES LIMITED, certify that the details of securities dematerialized/rematerialized during the aforesaid period, as required under Regulation 74(5) of SEBI (Depositories and participants) Regulations 2018 have been furnished to all the Stock Exchanges where the shares of the company are listed. Thanking You Yours faithfully, for KFIN TECHNOLOGIES LIMITED SHARMILA HEMANT AMIN ASSISTANT VICE PRESIDENT CC TO: KRONOX LAB SCIENCES LIMITED BLOCK NO.138, VILLAGE EKALBARA PADRA VADODARA GUJARAT, INDIA 391440