Dear Sir, Pursuant to the SEBI (Prohibition of Insider Trading) Regulations, 2015 and the Company's Code of Conduct, the Trading Window for dealing in the securities of the Company shall remain closed for all Designated Persons, Directors, KMPs, Officers and their Immediate Relatives from October 01, 2026 until 48 hours after the declaration of the Un-Audited Financial Results for the quarter and half year ended September 30, 2026. The date of ....

CRYSTAL BUSINESS SYSTEM LIMITED CIN: L92100DL1994PLC059093 Registered Office: 37, Second Floor, Rani Jhansi Road, Motia Khan, Paharganj, New Delhi- 110055 Email ID: cbnl.delhi@gmail.com, Website: www.sadhna.com Phone: 91-11-23552627, Fax No.: 91-11-23524610 Date: 30-09-2026 BSE Limited Metropolitan Stock Exchange Limited Phiroze Jeejeebhoy Towers, 205(A), 2nd floor, Piramal Agastya Corporate Park, Dalal Street, Kamani Junction, LBS Road, Kurla (West), Mumbai- 400001 Mumbai-400070 Scrip Code: 540821 Scrip Symbol: CRYSTAL Sub: Intimation of closure of Trading Window Dear Sir, Pursuant to the Provision of SEBI (Prohibition of Insider Trading) Regulations, 2015 read with the provisions of the Company’s Insider Trading code as amended, the “Trading Window” for dealing in the securities of the Company for all Designated Persons/Directors/KMPs/Officers and their immediate relatives with effect from October 01, 2026 till 48 hours after the Un-Audited Financial Results of the Company for the quarter and half year ended September 30, 2026 becomes generally available to the public. The Date of Board Meeting for declaration of the Un-Audited Financial Results of the Company for the quarter and half year ended September 30, 2026 will be intimated in due course. It has been informed to the designated persons that they and their immediate relatives to ensure compliance with the Securities and Exchange Board of India (Prohibition of Insider Trading), Regulations, 2015 and shall not trade or deal otherwise in the Company’s securities during the above period of trading window closure. Kindly take the same on the record. For and on behalf of Crystal Business System Limited Bal Mukund Tiwari Managing Director DIN: 02566683