Mahanagar Telephone Nigam Limited has informed the Exchange regarding the Trading Window closure pursuant to SEBI (Prohibition of Insider Trading) Regulations, 2015 NOTICE FOR CLOSURE OF TRADING WINDOW IN COMPLIANCE WITH SEBI (PROHIBITION OF INSIDER TRADING) (AMENDMENT) REGULATIONS, 2018 Notice is hereby given that during the period as notified below, the ??Trading Window?? shall remain closed and the Designated Persons and their Immediate Relatives, as defined under clause 2.8 and 2.10, respectively of the ??Internal Code of Conduct for Prevention of Insider Trading in Dealing with securities of MTNL?? shall not trade in securities (involving purchase or sale of shares) of MTNL either in their own name or in the name of their immediate relatives.??Designated Person?? means Board of Directors, Key Managerial Personnel, Employees of the Company and Concerned Persons as defined in SEBI (Prohibition of Insider Trading) (Amendment) Regulations, 2018.??Immediate Relative?? means a spouse of a person, and includes parent, sibling, and child of such person or of the spouse, any of whom is either dependent financially on such person, or consults such person in taking decisions relating to trading in securities.Purpose of Closure of Trading Window Start date of Closure of Trading Window Date of Opening of Trading WindowConsideration and approval of Audited Annual Financial Results of MTNL for the Financial Year 2018-2019. 12-04-2019 Till 48 hours after the Declaration of Financial Results.(S.R. Sayal)Company Secretary