Diffusion Engineers Limited — Regulatory Filings 2025

Sep 17, 2025

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Date: 17[th] September 2025

To, To, The Manager The Deputy General Manager, Listing Department Corporate Relationship Dept., National Stock Exchange of India Ltd. Bombay Stock Exchange, Exchange Plaza, 1[st ] Floor, New Trading Ring, Bandra Kurla Complex Dalal Street, Bandra East Mumbai – 400001 Mumbai – 400051 Scrip Code –544264 NSE Symbol - DIFFNKG

SUB: Regulation 30(6) of SEBI (LODR) Regulations, 2015 – Pre- Intimation of Participation in Arihant Bharat Connect Virtual Conference on Tuesday, 23[rd] September, 2025

Dear Sir/ Madam,

Pursuant to Regulation 30(6) of the SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015 (“the Listing Regulations”) read with Part A of Schedule III of the Listing Regulations, we wish to inform that the management of the Company will participate in the Bharat Connect Virtual Conference on 23[rd] September, 2025 at 02:00 PM organized by Arihant Capital.

The Discussion with the investor(s)/Analysts are based on generally available information and not related to any Unpublished Price Sensitive Information as per Diffusion Engineers Limited-Code of Practices and Procedures for Fair Disclosure of Unpublished Price Sensitive Information.

Thanking you,

For Diffusion Engineers Limited

Chanchal Digitally signed by Chanchal Rajesh Jaiswal Rajesh Date: 2025.09.17 10:59:31 Jaiswal +05'30'

Chanchal Jaiswal Company Secretary and Compliance Officer Membership no. A67136

For more details please visit: www.diffusionengineers.com

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