Pre-Intimation of Avendus Spark INDX: Annual Investor Conference 2026 to be held on 17th November 2026.

Date: 11th November, 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 SUB: Regulation 30(6) of SEBI (LODR) Regulations, 2015 – Pre- Intimation of Schedule of Analyst/Institutional Investor Meeting Dear Sir/Ma’am, Pursuant to Regulation 30(6) of the SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015 (“the Listing Regulations”) we wish to inform that the management of the Company will participate in Avendus Spark INDX Annual Investor Conference 2026 hosted by Avendus Spark, as detailed below: Date Name Time Mode Type 17th, Avendus Spark INDX: Annual November 10:00 AM In-Person Conference Investor Conference 2026 2026 Note: The schedule of the aforesaid conference is subject to change. The changes may happen due to exigencies on the part of Fund / Broking House / Company. No unpublished price sensitive information (UPSI) will be discussed. This is for your information and record. Thanking you, For Diffusion Engineers Limited Chanchal Jaiswal Company Secretary and Compliance Officer Membership no. A67136 For more details please visit: https://diffusionengineers.com/