Update regarding ESG Rating

August 21, 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 (SEBI LODR) – ESG Rating Dear Sir / Madam, Pursuant to Regulation 30 of SEBI LODR read with master circular SEBI/HO/CFD/PoD2/CIR/P/0155 dated November 11, 2024, we wish to inform you that Crisil ESG Ratings & Analytics Ltd., a SEBI registered Category-1 ESG Ratings Provider, has independently assigned CRISIL ESG rating of “67” as “Strong” and CRISIL Core ESG rating ‘70’ vide its report dated August 20, 2026. This rating reflects the Company’s performance on Environmental, Social and Governance parameters as assessed by the rating agency. The link for the rating as published by CRISIL: https://www.crisilesg.com/en/home/esg- ratings.html. Please note that the Company has not engaged CRISIL for ESG Rating & Core ESG rating. CRISIL has independently prepared the report based on data pertaining to FY 2025-26 of the Company available in public domain. This is being made available on the website of the Company at: https://www.mswil.motherson.com/ 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