Intimation of Trading Window Closure pursuant to SEBI (PIT) Regulations, 2015

HINDUSTAN COMPOSITES LTD. Peninsula Business Park, Tower “A”, 8th Floor, 801, Senapati Bapat Marg, Lower Parel, Mumbai - 400 013. Tel.: (91) (022) 6688 0100 | E-mail : hcl@hindcompo.com | Website : www.hindcompo.com | CIN No.: L29120MH1964PLC012955 25th September, 2026 The Manager The Manager – Listing Department of Corporate Services National Stock Exchange of India Limited BSE Limited Exchange Plaza, 5th Floor, ‘G’ Block Phiroze Jeejeebhoy Towers, Bandra Kurla Complex Dalal Street, Fort, Mumbai- 400 001 Bandra (East), Mumbai – 400 051 Scrip Code: 509635 SYMBOL: HINDCOMPOS Dear Sir/Madam, Sub: Intimation of closure of Trading Window as per the Securities and Exchange Board of India (Prohibition of Insider Trading) Regulations, 2015 With reference to the above subject, we wish to inform you that in terms of the Securities and Exchange Board of India (Prohibition of Insider Trading) Regulations, 2015 and Company's "Code of Conduct to Regulate, Monitor and Report Trading by Designated Persons and their Immediate Relatives", the Trading Window for dealing in the securities of the Company shall remain closed for all designated persons and their immediate relatives and for all insiders from Thursday, 1st October, 2026 till conclusion of 48 hours after the declaration of Un-audited Standalone and Consolidated Financial Results of the Company for the quarter and half year ending 30th September, 2026. The Trading Window shall open 48 hours after the said financial results are declared to the stock exchanges. The date of the Board meeting to consider and approve, interalia, Un-audited Standalone and Consolidated Financial Results of the Company for the quarter and half year ending 30th September, 2026 shall be intimated separately in due course. Kindly take the same on your record. Thanking you, Yours faithfully, For Hindustan Composites Limited Arvind Purohit Company Secretary & Compliance Officer Membership No.: A33624