Intimation of Trading Window Closure

September 28, 2026 National Stock Exchange of India Limited BSE Limited Exchange Plaza, 5th Floor Phiroze Jeejeebhoy Towers, Plot No.C/1, G-Block Dalal Street Mumbai – 400001, Bandra-Kurla Complex Maharashtra, India Bandra (E) MUMBAI – 400051, India Scrip Code : MSUMI Scrip Code : 543498 Subject: Trading Window Closure Dear Sir/ Madam, Pursuant to the SEBI (Prohibition of Insider Trading) Regulations, 2015 the trading window for dealing in shares of the Company shall remain closed for all designated persons including Promoters, Directors, Key Managerial Personnel, Designated Employees and their connected persons from Thursday, October 1, 2026 until 48 hours after the declaration of the unaudited financial results by the Company for second quarter and half year ending September 30, 2026. Further, in terms of SEBI circular SEBI/HO/ISD/ISD-PoD-2/P/CIR/2023/124 dated July 19, 2023, the Permanent Account Number of all designated persons and their connected persons will remain frozen during aforesaid trading window closure period for trade in securities of the Company. The date of the Board Meeting to consider and approve the unaudited financial results for the second quarter and half year ending September 30, 2026 will be intimated in due course. The above is for your information and records. Thanking You, Yours truly For Motherson Sumi Wiring India Limited Pooja Mehra Company Secretary Regd. Office: Motherson Sumi Wiring India Limited Unit – 705, C Wing, ONE BKC, G Block Bandra Kurla Complex, Bandra East Mumbai – 400051, Maharashtra (India) Tel: 022-61354800, Fax: 022- 61354801 CIN No.: L29306MH2020PLC341326 E-mail: investorrelations@mswil. motherson.com Website:www.mswil.motherson.com