Intimation of Resignation of Secretarial Auditor

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: 14th August, 2026 BSE Limited Phiroze Jeejeebhoy Towers, Dalal Street, Mumbai – 400001 Scrip Code: 531458 | ISIN: INE109B01019 Subject: Intimation regarding Resignation of Secretarial Auditor of the Company Dear Sir/Madam, Pursuant to the applicable provisions of the SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015, we hereby inform you that M/s Shashank Kumar & Associates, Practising Company Secretaries (FRN: S2018UP715500), has tendered its resignation as the Secretarial Auditor of Boston Commerce Limited (“the Company”), with effect from 2nd July, 2026, due to pre- occupational reasons. The Board of Directors of the Company, at its meeting held on 14th August, 2026, has taken note of the said resignation. A copy of the resignation letter dated 2nd July, 2026, received from M/s Shashank Kumar & Associates, is enclosed herewith for your information and record. You are requested to kindly take the above information on record. Thanking you, Yours faithfully, For Boston Commerce Limited ARCHANA CHAITANYA PANDYA ADDITIONAL WHOLE-TIME DIRECTOR DIN: 10147795 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 ANNEXURE-A Details as required under Regulation 30 of the SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015 read with the applicable SEBI Master Circular Resignation of Secretarial Auditor Sr. No. Particulars Details 1. Name of the Company Boston Commerce Limited 2. Name of the Secretarial Auditor M/s Shashank Kumar & Associates, Practising Company Secretaries (FRN: S2018UP715500) 3. Resignation. M/s Shashank Kumar & Associates has tendered its resignation as Reason for change viz. Secretarial Auditor of the Company due to appointment, re-appointment, pre-occupational decisions. The detailed resignation, removal, death or reason for resignation is mentioned in the otherwise enclosed resignation letter dated 2nd July, 2026. 4. Date of appointment/re- Date of Cessation: 2nd July, 2026. appointment/cessation (as applicable) and term of appointment/re-appointment 5. Brief Profile (in case of Not Applicable appointment) 6. Disclosure of relationships between directors (in case of Not Applicable appointment of a director)