Closure of Trading Window

BOSTON COMMERCE LIMITED (Formerly known as Boston Bio Systems Limited) Registered office: Office No. 11, Krishna Complex, Mahatma Gandhi Bridge, Shreyas Colony, Navrangpura, Ahmedabad, 380009 CIN: L62013GJ1995PLC025476; E-mail: bostonsystem@yahoo.com Website: www.bostonbio.in Date: September 29, 2026 The Manager Department of Corporate Services BSE Limited Phiroze Jeejeebhoy Towers Dalal Street Mumbai – 400001 Sub: Intimation regarding Closure of Trading Window Dear Sir/Madam, Pursuant to the provisions of the SEBI (Prohibition of Insider Trading) Regulations, 2015, as amended from time to time, and the Company’s Code of Conduct to Regulate, Monitor and Report Trading by Insiders and Designated Persons, we wish to inform you that the Trading Window for dealing in the securities of Boston Commerce Limited shall remain closed with effect from Thursday, October 1, 2026, for all Designated Persons, their Immediate Relatives and other persons covered under the Company’s Code. The Trading Window shall reopen after the expiry of 48 hours from the declaration of the Unaudited Financial Results of the Company for the quarter and half year ending September 30, 2026. The aforesaid closure of the Trading Window has also been communicated to the Designated Persons of the Company. You are requested to kindly take the above information on record. Thanking you, Yours faithfully, For Boston Commerce Limited Archana Chaitanya Pandya Whole-Time Director & Chief Financial Officer DIN: 10147795