Closure of Trading Window

RHI MAGNESITA RHI MAGNESITA INDIA LTD. (Formerly Orient Refractories Ltd.) 19th & 20th Floor, DLF Square, M-Block, Phase I, Jacranda Marg, DLF City, Gurugram, Haryana- 122002 T +91 124 4299000 E corporate.india@rhimagnesita.com www.rhimagnesitaindia.com 30 September 2026 BSE Limited National Stock Exchange of India Limited Phiroze Jeejeebhoy Towers Exchange Plaza, Bandra Kurla Complex Dalal Street, Mumbai-400001. Bandra (East), Mumbai STOCK CODE: 534076 STOCK CODE: RHIM Dear Sir/ Ma’am, Sub: Notice of Closure of Trading Window This is to inform that pursuant to Securities and Exchange Board of India (Prohibition of Insider Trading) Regulations 2015 and the Company's Code of Conduct for Prevention of insider Trading, the trading window for dealing in securities of the Company by its Designated Persons and their immediate relatives shall remain closed from 1 October 2026. The trading window shall be opened forty-eight (48) hours after the financial results of the Company for the quarter ended 30 September 2026 would be declared and disseminated to the Stock Exchanges. Request to kindly take the same on record. Thanking you, Yours faithfully For RHI Magnesita India Limited Sanjay Kumar Company Secretary (ICSI Membership No.: A17021) Registered Office: Unit No.705, 7th Floor, Lodha Supremus, Kanjurmarg Village Road, Kanjurmarg (East), Mumbai-400042 Tel : 022 - 4985120 CIN: L28113MH2010PLC312871