Intimation of Closure of Trading Window.

NILACHAL REFRACTORIES LTD. CIN: L26939OR1977PLC000735, GSTIN: 21AABCN1241N1ZS Viswakarma Building, 86C Topsia Road, North East Block, 1st Floor, Kolkata–700046, INDIA Email: cs@nilachal.in, Mob: 8013487872 Date: 28th September, 2026 The Secretary To The Listing Department The Secretary BSE Limited Calcutta Stock Exchange Limited P.J. Tower, Dalal Street 7 Lyons Range Mumbai-400001 Kolkata- 700001 BSE Scrip Code: 540481 CSE Scrip Code: 13099 Dear Sir/Madam, Sub: Intimation of closure of Trading Window Pursuant to the provisions of SEBI (Prohibition of Insider Trading) Regulations, 2015, and in terms of the Company's ‘Code of Conduct for prevention of Insider Trading’, it is informed that the Trading Window for dealing in securities of the Company will remain closed for the all the Designated Persons and their immediate relative(s) w.e.f. 1st October, 2026 till 48 hours after declaration of Un-Audited Financial Results of the Company for quarter ending on 30th September, 2026. The date of the Board Meeting for approval of Un-Audited Financial Results of the Company for quarter ending on 30th September, 2026, shall be intimated to you in due course. This is for your information and records. Kindly take the above on record. Thanking you. Yours faithfully, For NILACHAL REFRACTORIES LTD Mukesh Kumar Shaw Company Secretary & Compliance Officer Mem No: 80201 Encl: As above Works: Ipitata Nagar, Gundichapada, Dhenkanal-759025, Odisha, Email: nrl.dnk@gmail.com Regd. Office: P-598/599, Kedarnath Appartment, Mahabir Nagar,Lewis Road, Bhubaneswar-751002 (Odisha)