Intimation of Closure of Trading Window

To, Date: September 30, 2026 BSE Limited National Stock Exchange of India Limited Phiroze JeeJeeBhoy Towers Exchange Plaza Dalal Street, Fort Bandra-Kurla Complex, Bandra(E) Mumbai 400001 Mumbai 400051 Scrip Code: 532408 Symbol: SIGMAADV Dear Sir(s), Sub: Intimation of Closure of Trading Window We wish to inform you that pursuant to SEBI (Prohibition of Insider Trading) Regulations, 2015 as amended, and as per the clarifications issued vide Circular No. LIST/COMP/01/2019-20 of BSE and Circular No. NSE/CML/2019/11 of NSE, both dated April 2, 2019, the Trading Window for the purpose of dealing in securities of the Company shall remain closed for designated persons and their immediate relatives of the Company from October 01, 2026 and till the expiry of 48 hours after the unaudited financial results of the Company for the Second Quarter ending on September 30, 2026 become generally available information. The date of Board Meeting to consider the above un-audited financial results (Standalone and Consolidated) shall be intimated separately. This is for your information and records. Thanking You, For Sigma Advanced Systems Limited (Formerly Megasoft Limited) Krishna Chaitanya Sadhu Company Secretary & Compliance Officer