Trading Window

September 25, 2026 The General Manager The Vice President Department of Corporate Relations Listing Department BSE Limited National Stock Exchange of India Limited Phiroze Jeejeebhoy Towers Dalal Exchange Plaza, Bandra Kurla Complex Street Fort, Mumbai 400001 Bandra (East), Mumbai 400051 Scrip code:500179 Scrip Symbol: HCL-INSYS Subject: Intimation of Closure of Trading Window for quarter and half-year ended September 30, 2026 Dear Sir/Madam, We wish to inform that pursuant to the provisions of SEBI (Prohibition of Insider Trading) Regulations, 2015 and the Company’s Code of Conduct to prevent insider trading by Designated Persons and their Immediate Relatives, the trading window for dealing in the securities of the Company will be closed for all Designated Persons and their Immediate Relatives from October 01, 2026, till 48 hours after the announcement of the unaudited financial results for the quarter and half-year ending on September 30, 2026. Designated Persons and their immediate relatives are prohibited from entering into any transaction involving dealing/ trading in securities of the Company during the aforesaid period of closure of trading window. The date of board meeting for consideration & approval of the unaudited standalone & consolidated financial results of the Company for the quarter and half year ending on September 30, 2026, will be intimated in due course. We request you to take the above on record. Thank you, For and on behalf of: HCL Infosystems Limited Twinkle Monga Company Secretary and Compliance Officer Membership No: A-54882