Intimation of Closure of trading Window under SEBI (Prohibition of Insider Trading ) Regulations, 2015 from October 01, 2026 till 48 hours after the declaration of Un-Audited Financials Results of the Company for the Quarter and Half year ended September 30, 2026.

Date: September 22, 2026 To, To, The Manager The Manager Listing Department Corporate Relationship Department National Stock Exchange of India Limited BSE Limited Exchange Plaza, Plot No. C/1, G Block Floor 25, Phiroze Jeejeebhoy Towers, Bandra Kurla Complex Dalal Street, Bandra (East), Mumbai - 400 001 Mumbai - 400 051 BSE Scrip Code - 544264 NSE Symbol: DIFFNKG Dear Sir/Madam, Subject‐: Intimation of Closure of Trading Window under the SEBI (Prohibition of Insider Trading) Regulations, 2015 In terms of provisions of Securities Exchange Board of India (Prohibition of Insider Trading) Regulations, 2015, as amended from time to time and in terms of Company’s Code of Conduct for Prohibition of Insider Trading, the Trading Window for dealing in the Equity Shares of the Company shall remain close for all Designated Persons and their immediate relatives, from October 01 , 2026 till 48 hours after the declaration of the Un-Audited Financial Results of the Company for the quarter and half-year ended September 30, 2026. The date of Board Meeting to be held for considering and approving the Un-Audited Financial Results (Standalone and Consolidated) of the Company for the quarter and half-year ended September 30, 2026 shall be intimated in due course Kindly take the above information on record. Thanking You, For Diffusion Engineers Limited Chanchal Jaiswal Company Secretary and Compliance Officer ICSI Membership No.: A67136