Enclosed is the certificate under Reg. 74(5) of SEBI (DP) regulations, 2018 for the Quarter ended 30.09.2026

07.10.2026 BSE Limited National Stock Exchange of India Limited Phiroze JeeJeebhoy Towers, Exchange Plaza, Plot no. C/1, Dalal Street, G Block, Bandra-Kurla Complex Fort, Bandra (E), Mumbai – 400 001 Mumbai - 400 051 Scrip Code: 543318 Trading Symbol: CLEAN Subject: Confirmation Certificate under Regulation 74(5) of Securities and Exchange Board of India (Depositories and Participants) Regulations. 2018. Dear Sir/Madam This is to inform that pursuant to the provisions of the Regulation 74(5) of the Securities and Exchange Board of India (Depositories and Participants) Regulations, 2018, we are forwarding herewith Certificate received from MUFG Intime India Private Limited (Formerly Link Intime India Private Limited), Registrar and Share Transfer Agent of the Company, confirming that they did not received any securities for dematerialization during the Quarter ended 30th September, 2026. Request you to take the same on record. Thanking You. Yours faithfully, For Clean Science and Technology Limited Ruchita Vij Company Secretary and Compliance Officer MUFG Intime India Private Limited (Formerly Link Intime India Private Limited) CIN: U67190MH1999PTC118368 Block No 202, 2nd Floor, Akshay Complex, Off Dhole Patil Road, Pune - 411001 Tel : +91 20 26161629 Website: https://in.mpms.mufg.com SEBI Registration no.: INR000004058 06/10/2026 Clean Science and Technology Limited Office No. 603 & 604, 6th Floor, Tower No.15, Cybercity, Magarpatta City, Hadapsar, Pune – 411013 Subject: Confirmation Certificate in the matter of Regulation 74(5) of Securities and Exchange Board of India (Depositories and Participants) Regulations, 2018. Dear Sir/Madam, With reference to the above-mentioned regulation, we hereby confirm that we did not receive any securities for dematerialization during the quarter ended 30th September 2026. We request you to kindly take note of the above in your records. Thanking You, Yours faithfully, For MUFG Intime India Private Limited (Formerly Link Intime India Private Limited) Ashok Shetty Vice President – Corporate Registry Part of MUFG Pension & Market Services C-101, Embassy 247, L. B. S. Marg, Vikhroli (West), Mumbai - 400 083. Tel. : +91 22 4918 6000.