Intimation for Closure of Trading Window

September 28, 2026 BSE Limited National Stock Exchange of India Limited Phiroze Jeejeebhoy Towers, Exchange Plaza, C-1, Block G, Dalal Street, Bandra-Kurla Complex, Mumbai 400 001 Bandra (East), Mumbai 400 051 Scrip Code: 544184 Trading Symbol: BOROSCI Dear Sirs, Sub: Intimation of Closure of Trading Window This is to inform that in terms of the "Code of Conduct for Monitoring and Prevention of Insider Trading" adopted by the Company under the Securities and Exchange Board of India (Prohibition of Insider Trading) Regulations, 2015, the Trading Window for dealing in the equity shares of the Company shall remain closed for all Designated Persons and their immediate relatives from October 01, 2026 till the end of 48 hours after the declaration of Un-audited Financial Results (Standalone & Consolidated) for the quarter and half year ending September 30, 2026. The date of Board Meeting for consideration and approval of the said Financial Results will be intimated separately. Please take the above on records. Yours faithfully, For Borosil Scientific Limited Ramavtar Sharma Company Secretary & Compliance Officer