ESG Rating update

September 16, 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: Disclosure under Regulation 30 of the SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015 – ESG Rating Dear Sir / Madam, Pursuant to Regulation 30 read with Para A(3) of Part A of Schedule III of the SEBI Listing Regulations, this is to inform that Niche Ninety Nine Capability and Certifications (OPC) Private Limited (“Niche”) has assigned an ESG rating of 72 which was duly confirmed to Company on September 16, 2026. We would like to clarify that the Company has not engaged Niche for any such rating or report and the same is independently prepared by them based on information available in the public domain. 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