Certificate under Reg. 74(5) of SEBI (DP) Regulations, 2018 for the quarter ended 30th September 2026

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.bostoncommerce.net Date: October 09, 2026 The Listing Department BSE Limited Department of Corporate Affairs Phiroze Jeejeebhoy Towers Dalal Street, Mumbai – 400001 Reference: ISIN - INE109B01019; Scrip Code - 531458; Symbol - BOSTON Subject: Certificate under Regulation 74(5) of SEBI (Depositories and Participants) Regulations, 2018 for the quarter ended 30th September, 2026. Dear Sir/Madam, Pursuant to Regulation 74(5) of the SEBI (Depositories and Participants) Regulations, 2018, we hereby submit the confirmation certificate received from our Registrar and Share Transfer Agent, M/s. Adroit Corporate Services Private Limited, for the quarter ended 30th September, 2026. You are requested to kindly take the same on your records. Thanking you, Yours faithfully, For Boston Commerce Limited (Formerly known as Boston Bio Systems Limited) Archana Chaitanya Pandya Whole Time Director DIN: 10147795 Encl.: Certificate under Regulation 74(5) for the quarter ended 30th September, 2026. 07 October 2026 BOSTON COMMERCE LIMITED OFFICE NO. 11, KRISHNA COMPLEX, MAHATMA GANDHI BRIDGE SHREYAS COLONY,NAVRANGPURA AHMEDABAD 380009 Subject: Confirmation Certificate in the matter of Regulation 74(5) of Securities and Exchange Board of India (Depositories and participants) Regulations, 2018. Dear Sir/Madam, In reference to the above captioned regulation,we hereby confirm that the securities received from the depository participants for dematerialisation during the quarter ended 30th September,2026, were confirmed (accepted/rejected) to the depositories by us and that securities comprised in the said certificates have been listed on the stock exchanges where the earlier issued securities are listed. We hereby also confirm that the security certificates received for dematerialisation have been Mutilated and cancelled after due verification by the depository participant and the name of the depositories have been substituted in register of members as regist- ered owner within 15 days. We request you to kindly take note of the above in your records. Thanking you, Yours faithfully, For Adroit Corporate Services Pvt. Ltd. Authorized Signatory. 19-20 Jaferbhoy Industrial Estate, Makwana Road, Marol Naka, Andheri (E), Mumbai, Maharashtra, 400 059. Tel: 022 - 4227 0400, 2859 4060. Fax: 2850 3748. Email: info@adroitcorporate.com CIN: U67190MH1994PTC079160