Analysts/Institutional Investor Meet/Con. Call Updates

Date: August 13, 2026 To, To, The Manager The Manager Listing Department Corporate Relationship Department National Stock Exchange of India Limited BSE Limited Exchange Plaza, Bandra Kurla Complex Floor 25, Phiroze Jeejeebhoy Towers, Bandra (East), Dalal Street, Mumbai - 400 051 Mumbai - 400 001 NSE Symbol: DIFFNKG BSE Scrip Code - 544264 Dear Sir/Madam, Subject: Audio recording of the Earning Conference Call with Investor & Analyst – Q1 Results FY 2026-27 Pursuant to Regulation 30 of the SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015, the audio recording of the Investor & Analyst meet held on August 13, 2026 on the Un-Audited Financial Results of the Company for the quarter ended June 30, 2026, has been made available on the Company’s Website i.e https://www.diffusionengineers.com/investors- relation The link for the same is mentioned below: https://diffusionengineers.com/wp-content/uploads/2026/08/10046623.mp3.mp3 Thanking You. Yours faithfully, For Diffusion Engineers Limited Chanchal Jaiswal Company Secretary and Compliance Officer Membership no. A67136