Pursuant to the SEBI (Prohibition of Insider Trading) Regulations, 2015 and in accordance with the Policy on Code of Conduct for Regulating, Monitoring & Reporting of Trades and Prevention of Insider Trading of the Company, the Trading Window for dealing in securities/shares of Tandhan Industries Limited (Formerly known as Sanmitra Commercial Limited) 'the Company' will remain closed for Insiders, Designated Persons and their immediate relatives ....

TANDHAN INDUSTRIES LIMITED Formerly known as Sanmitra Commercial Limited CIN L22209MH1985PLC034963 Registered Address 13, Prem Niwas 652, Dr. Ambedkar Road, Khar west, Mumbai, Maharashtra, India, 400052 Corp Office: Mouza Kashyabpur, J. L. No. 15, Kulgachia, Uluberia, Howrah-711303, West Bengal, India Email Id: sanmitracommercial@ymail.com | www.sanmitracommercial.com | Tel.: 022-22821087. 033-26210016/17 Date: 25th September, 2026 The Chief General Manager Listing Operation, BSE Limited, P. J. Towers, Dalal Street, Fort, Mumbai – 400 001. Ref: Scrip Code: 512062, ISIN: INE896J01014 Subject: Intimation of Closure of Trading Window from 1st October, 2026. Dear Sir / Madam, Pursuant to the SEBI (Prohibition of Insider Trading) Regulations, 2015 (including any statutory modification(s) or re-enactment(s) thereof, for the time being in force) and in accordance with the Policy on Code of Conduct for Regulating, Monitoring & Reporting of Trades and Prevention of Insider Trading of the Company, the Trading Window for dealing in securities/shares of Tandhan Industries Limited (Formerly known as Sanmitra Commercial Limited) “the Company” will remain closed for Insiders, Designated Persons and their immediate relatives with effect from Thursday, 1st October, 2026, till the completion of 48 hours after the declaration of Unaudited Standalone and Consolidated Financial Results of the Company for the quarter and half year ending 30th September, 2026 (both days inclusive). Accordingly, Insiders, Designated Persons of the Company and their immediate relatives are advised not to trade (buy, sell or pledge, etc.) in the securities/shares of the Company during the aforesaid period of closure of the Trading Window. The Board Meeting date for consideration and approval of Unaudited Standalone and Consolidated Financial Results of the Company for the quarter and half year ending 30th September, 2026, shall be intimated in due course. A copy of this intimation shall be made available on the Company's website at www.sanmitracommercial.com Kindly take the above information on your records. Thanking you. Yours faithfully, For Tandhan Industries Limited (Formerly known as Sanmitra Commercial Limited) Priti Priya Singh Company Secretary & Compliance Officer Membership No: A54260