Intimation of closure of trading window

Sundram Fasteners Limited REGISTERED & CORPORATE OFFICE 98.A, VII FLOOR DR. RADHAKRISHNAN SALAI, MYLAPORE. CHENNAI . 600 004. INDIA Email: investorshelpdesk@sfT.co.in TELEPHONE , +91 . 44 - 28478500 PAN . AAACS8779D CIN L35999TN 1 962PLCO04943 WEBSITE www.sundrom.com September 29, 2026 National Stock Exchange of India Limited By NEAPS Scrip symbol - SUNDRMFAST Exchange Plaza, 5th Floor, Plot No. C/1, G Block, Bandra-Kurla Complex Bandra (East), Mumbai - 400 051 BSE Limited By Listing Centre Scrip Code - 500403 Phiroze Jeejeebhoy Towers DalaI Street, Fort Mumbai - 400 001 Dear Sir / Madam, Sub: Intimation of Trading Window Closure We wish to inform you that the trading window for dealing in securities of the Company shall remain closed from September 30, 2026 (Wednesday) till 48 hours after the declaration of the Unaudited financial results for the second quarter ending September 3D, 2026, as per the Code of Conduct for Regulating, Monitoring and Reporting of Trading by Designated Persons of the Company framed under the Securities and Exchange Board of India (Prohibition of Insider Trading) Regulations, 2015 The date of the meeting of the Board of Directors to consider approval of the Unaudited financial results for the second quarter ending September 30, 2026, will be intimated later. Please take the above information on record. Thanking you, Yours truly, For Sundram Fasteners Limited G Anand Babu Senior Manager– Finance & Company Secretary