Diffusion Engineers Limited — Regulatory Filings 2025

Nov 11, 2025

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Date: November 11, 2025

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,

Sub:‐ Intimation under Regulation 29 of Securities and Exchange Board of India (Listing Obligations and Disclosure Requirements) Regulations, 2015, for consideration of UnAudited Financial Results (Standalone and Consolidated) for the quarter and half year ended September 30, 2025.

Pursuant to Regulation 29 of the Securities and Exchange Board of India (Listing Obligations and Disclosure Requirements) Regulations, 2015 (“Listing regulations”), we hereby inform you that a meeting of the Board of Directors of the Company is scheduled to be held on Friday, November 14, 2025, inter alia, to consider, approve and take on record, the Unaudited Financial Results (Standalone and Consolidated) of the Company for the quarter and half year ended September 30, 2025.

Further, in accordance with the Securities and Exchange Board of India (Prohibition of Insider Trading) Regulations, 2015, the trading window for dealing in securities of the Company which has been closed from Wednesday, October 01, 2025, for all the designated persons and their immediate relatives as defined in the Code, shall re-open after the expiry of 48 hours from the date of declaration of the said financial results.

You are requested to kindly take the same on your record.

Thanking You. Yours faithfully,

For Diffusion Engineers Limited

Chanchal Digitally signed by Chanchal Rajesh Jaiswal Rajesh Jaiswal Date: 2025.11.11 10:25:12 +05'30'

Chanchal Jaiswal Company Secretary and Compliance Officer ICSI Membership no. A67136

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