Information about Closure of Trading Window Period

cls::lfclt1J..1 a,lciR~R fclf&lzs f6~«tl.-l (m«f ~ 3ll"Jf) ~ ~: 11, '1fll'~~ ~ m, ~, ~ - 400 020 Delivering~ Happiness® Hindustan Petroleum Corporation Limited "'-../'" (A Govt. of India Enterprise) Regd. Office: 17, Jamshedji Tata Road, Churchgate, Mumbai -400 020 Ref: Co.Secy/RKS/351/2026 September 25, 2026 BSE Limited, Phiroze Jeejeebhoy Towers, Dalal Street, Mumbai – 400 001 Scrip Code: 500104 Sub: Information about Closure National Stock Exchange of India Limited, of Trading Window Period Exchange Plaza, 5th Floor, Plot No. C/1, G-Block, Bandra-Kurla Complex, Bandra East, Mumbai – 400 051 Scrip Name : HINDPETRO Dear Sirs, We refer to our earlier letter Ref: Co.Secy/RKS/086/2026 dated March 25, 2026 on the subject. In terms of HPCL's Code “The Code for Prohibition of Insider Trading in the Securities of HPCL", the Trading Window for dealing in the Securities of the Company shall remain closed from Thursday, October 01, 2026 till 48 hours after Un-audited Financial Results of the Company for the Quarter/ Half Year ended September 30, 2026 are communicated to the Stock Exchanges. The date of Board Meeting to consider the aforesaid Results shall be informed to the Stock Exchanges in due course. The above is for your information and records. Thanking you, Very truly yours, Rakesh Kumar Singh Company Secretary 17, =~Tc";Gft -rr.s, ~- 400 020 I ~: 2286 3900 17, Jamshedji Tata Road, Churchgate, Mumbai -400 020 I Phone: 2286 3900 email: corphqo@hpcl.in I website: www.hindustanpetroleum.com I CIN: L23201MH1952GOI008858