Closure of Trading Window Pursuant to SEBI (Prohibition of Insider Trading) Regulations, 2015.

September 29, 2026 BSE Limited National Stock Exchange of India Limited Dept. DSC_CRD Exchange Plaza, Phiroze Jeejeebhoy Towers, Plot No. C/1, ‘G’ Block, Dalal Street Bandra- Kurla Complex, Mumbai 400 001 Bandra (‘E’), Mumbai 400 051 BSE Scrip Code: 506222 NSE Symbol: STYRENIX Subject: Closure of trading window Dear Sir / Madam, This is to inform that pursuant to the SEBI (Prohibition of Insider Trading) Regulations, 2015 and the Company's Code of Conduct for Prevention of Insider Trading, the Trading Window for dealing in the Equity Shares of the Company by its Designated Persons and their Immediate Relatives will remain closed from Thursday, October 01, 2026 in connection with the declaration of the unaudited financial results of the Company for the Second quarter / half year ended on September 30, 2026. The trading window shall be opened 48 (Forty-Eight) hours after the said results of the Company are declared and disseminated to the Stock Exchanges. The details of the date of Board meeting shall be intimated in due course. Kindly take the above information on your records. Thanking You, Yours faithfully, For Styrenix Performance Materials Limited Chintan Doshi Senior Manager Legal & Company Secretary