Dolphin Medical Services has announced the closure of its trading window for Designated Persons and their immediate relatives, effective from April 1. This window will remain closed until 48 hours after the company declares its financial results for the quarter and year ended March 31. The exact date for the board meeting to consider these financial results will be announced in due course. This measure is a standard practice to prevent insider trading ahead of key financial disclosures, ensuring fair market practices for all investors.