Diffusion Engineers Limited has announced the closure of its trading window for designated persons and their immediate relatives. This closure will be effective from January 01, 2026, and will continue until 48 hours after the declaration of the Un-Audited Financial Results for the quarter and nine months ended December 31, 2025. The company will announce the date of the Board Meeting, which will consider and approve these financial results (Standalone and Consolidated), in due course. The intimation is made in accordance with the SEBI (Prohibition of Insider Trading) Regulations, 2015, and the company's own Code of Conduct for Prohibition of Insider Trading.