Pursuant to Reg 74(5) of SEBI (DP) Reg., 2018, please find enclosed herewith RTA certificate for the quarter ended September 30, 2026.

Telephone: +91 22 6661 7272 | Email: info.india@blackbox.com BBOX/SD/SE/2026/88 October 7, 2026 Corporate Relationship Department Corporate Relationship Department Bombay Stock Exchange Limited The National Stock Exchange of India Limited P.J. Tower, Dalal Street, Exchange Plaza, Bandra Kurla Complex, Fort, Mumbai 400001 Bandra East, Mumbai 400051 Sub: Submission of Certificate under Regulation 74(5) of the SEBI (Depositories and Participants) Regulations, 2018 for the quarter ended September 30, 2026 Ref.: Scrip Code: BSE: 500463/ NSE: BBOX Dear Sir/Madam, Pursuant to Regulation 74(5) of the SEBI (Depositories and Participants) Regulations, 2018, please find enclosed herewith the certificate issued by M/s. Datamatics Business Solution Limited, Registrar & Share Transfer Agent ('RTA') of the Company, for the quarter ended September 30, 2026. This is for your information, record and necessary dissemination to all the stakeholders. Thanking You. Yours Faithfully, For Black Box Limited Aditya Goswami Company Secretary & Compliance Officer Encl.: A/a BLACK BOX LIMITED Registered Office: 501, 5th Floor, Building No. 9, Airoli Knowledge Park, MIDC Industrial Area, Airoli, Navi Mumbai 400 708, India BLACKBOX.COM | CIN: L32200MH1986PLC040652 | Tel: +91 22 6661 7272