In accordance with the requirements of Regulation 30 read with Schedule III of the SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015, Thirumalai Chemicals has informed that the Board of its step-down subsidiary Optimistic Organic Sdn Bhd (‘OOSB’), has informed them that at its December 4, 2025 meeting, they have noted that the Maleic Anhydride unit outage will be prolonged more than anticipated. This is due to failure of machinery, which was expected to have been rectified earlier. The Maleic Anhydride business contributed about INR 235 Cr. (9.6%) of FY25 consolidated revenue; its closure has resulted in reduced revenue. In the meantime, the derivatives plant of OOSB continues to operate. The additional information required as per SEBI master circular dated November 11, 2024 are enclosed. Further it has informed that the Maleic Anhydride unit of its subsidiary, OOSB contributed approximately INR 235 crore (9.6%) to the consolidated revenue for FY25 and constituted about INR 140 crore (4%) of the consolidated net worth as at end of FY25.

The above information is a part of company’s filings submitted to BSE.