Enclosed is the intimation for conclusion of GST proceedings.

30th September, 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, Mumbai – 400 001 Bandra (E), Mumbai - 400 051 Scrip Code: 543318 Trading Symbol: CLEAN Subject: Disclosure pursuant to Regulation 30 of the SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015 – Search and Seizure proceedings by Goods and Services Tax (GST) Department. Dear Sir/Madam, Pursuant to Regulation 30 read with Para A of Part A of Schedule III of the SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015 (“SEBI LODR Regulations”), and further to our earlier intimation dated 23rd September, 2026, we hereby inform you that, the Search and Seizure proceedings initiated by the Maharashtra Goods and Services Tax Department (“Department”) on 23rd September, 2026 at the premises of the Company and its wholly-owned subsidiary have been concluded on 29th September, 2026. Further, pursuant to the conclusion of the proceedings, the Department has determined a GST liability of ₹9.9 crore under the Reverse Charge Mechanism (RCM). The Company is eligible to avail the entire amount of such GST liability as an Input Tax Credit, subject to the applicable provisions of law. In addition, the Department has determined interest and certain non-creditable tax liabilities aggregating to ₹2.0 crore. The Company has duly considered the matter and has decided to discharge and settle the aforesaid outstanding liability. Accordingly, the aggregate amount of ₹2.0 crore towards interest and non-creditable tax liabilities represents the net financial impact/cost to the Company arising from the proceedings. We would also like to reiterate our Stakeholders that, above said proceedings have not caused any disruption to the Company’s business operations. The Company’s manufacturing and other operations have continued in the normal course, with the financial impact remaining negligible, as stated above. The Company continues to remain steadfast in its commitment to the highest standards of compliance, corporate governance and regulatory discipline. The Company has extended, and will continue to extend, its full and proactive co-operation to the concerned authorities and provide all necessary assistance and information as may be required, from time to time. The details of the above as required under Clause 19 of Para A of Part A of Schedule III of the Listings Regulations read with SEBI Master Circular No. HO/49/14/14(7)2025-CFD-POD2/I/3762/2026 dated 30th January, 2026 are enclosed as an Annexure A. This intimation is also being made available on the Company’s website at https://cleanscience.co.in/ Kindly take the above information on record. For Clean Science and Technology Limited Ruchita Vij Company Secretary and Compliance officer ANNEXURE A DETAILS UNDER REGULATION 30 OF THE LISTING REGULATIONS READ WITH SEBI MASTER CIRCULAR NO. HO/49/14/14(7)2025-CFD-POD2/I/3762/2026 DATED JANUARY 30, 2026 Sr. Particulars Details/Information 1 Name of the Authority Goods and Services Tax Department, State of Maharashtra. 2 Nature and details of the action(s) taken, The Search and Seizure proceeding u/s 67 of the initiated or order(s) passed Maharashtra Goods and Services Tax Act, 2017 was initiated at Registered Office and manufacturing units of the Company and its wholly owned subsidiary company, situated in the State of Maharashtra. 3 Date of receipt of direction or order, including any The Search and Seizure initiated on ad-interim or interim orders, or any other Wednesday, 23rd September 2026 concluded communication from the authority. on Tuesday, 29th September, 2026. 4 Details of the violation(s)/contravention(s) The Department has determined a GST liability committed or alleged to be committed of Rs. 9.9 crore under the Reverse Charge Mechanism (RCM). The Company is eligible to avail the entire amount as input tax credit, subject to the applicable provisions of law. 5 Impact on financial, operation or other activities The Department has determined interest and of the listed entity, quantifiable in monetary certain non-creditable tax liabilities aggregating terms to the extent possible. to Rs. 2.0 crore. The Company has decided to pay and settle this outstanding liability. Apart from above there is no material/ significant impact on the financials, business operations or any other activities of the Company due to the aforesaid Search and Seizure proceedings.