Closure of Trading Window for Q2 financial result

3M India Limited 5th Floor Marksquare, 61, St Marks Road, Bengaluru 560001, India Tel: +91 80 22231414 www.3M.com/in September 24, 2026 Corporate Relationship Department BSE Limited 1st Floor, New Trading Ring, Rotunda Building P.J. Towers, Dalal Street, Fort Mumbai - 400 001 Scrip Code - 523395 The Secretary National Stock Exchange of India Limited Exchange Plaza, Bandra – Kurla Complex Bandra (E), Mumbai – 400 051 Scrip Code – 3MINDIA Dear Sirs, Sub: Intimation of Trading Window closure. In accordance with the SEBI (Prohibition of Insider Trading) Regulations, 2015, as amended, read with the Company’s Code of Conduct to Regulate, Monitor and Report Trading by Insiders, please note that the Trading Window for dealing in Equity Shares of the Company by the Promoters and Persons Acting in Concert, Directors, Designated Persons and their Immediate Relatives shall remain closed with effect from October 1, 2026 and the same shall reopen after 48 hours from the declaration of Financial Results of the Company for the quarter ending September 30, 2026. We request you to please take the same on record. Thanking you Yours faithfully For 3M India Limited Pratap Rudra Bhuvanagiri Company Secretary & Compliance Officer Regd Office: Plot No 48-51, Electronics City, Bengaluru 560100 CIN No: L31300KA1987PLC013543