Hindustan Petroleum Corporation Limited (HPCL) has announced the closure of its trading window for dealing in the company's securities. This closure will be effective from Thursday, January 01, 2026. The trading window will remain closed until 48 hours after the communication of the company's un-audited financial results for the quarter ended December 31, 2025, to the stock exchanges. The specific date for the Board Meeting to consider these financial results will be communicated in due course. This information follows up on a previous letter dated March 25, 2025, regarding the same subject, and is in accordance with HPCL's Code for the Prohibition of Insider Trading in its Securities.