Intimation Regarding Change In Name of Company Secretary & Compliance Officer

Date: 29/09/2026 To, To, National Stock Exchange of India Ltd., BSE Limited Exchange Plaza, C-1, Block G, Phiroze Jeejeebhoy Towers Bandra Kurla Complex, Bandra (E), Dalal Street Mumbai – 400 051 Mumbai- 400001 NSE Scrip Symbol: INTERARCH BSE Scrip Code 544232 Ref: Regulation 30 of Securities and Exchange Board of India (Listing Obligations and Disclosure Requirements) Regulations, 2015. Subject: Intimation regarding Change in Name of Company Secretary & Compliance Officer With reference to the approval received from Ministry of Corporate Affairs (“MCA”) dated 21st September, 2026 and Pursuant to Regulation 30 of the SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015, we would like to inform that, post marriage, the surname of Company Secretary and Compliance Officer has been changed as follows: S.No. Name Before Marriage Name Post Marriage 1. Nidhi Goel Nidhi Khandelwal You are requested to change the name in the records of stock exchange-Corporate Information as above. We request you to kindly please take the same on your record. For INTERARCH BUILDING SOLUTIONS LIMITED (Formerly Known as Interarch Building Products Limited) ARVIND NANDA MANAGING DIRECTOR DIN: 00149426 INTERARCH BUILDING SOLUTIONS LIMITED (Formerly known as Interarch Building Products Limited) Corporate Office : B-30, Sector 57, Noida - 201301, India. Tel.: +91 120 4170200, CIN: L45201DL1983PLC017029 Registered Office: Farm No-8, Khasra No. 56/23/2, Dera Mandi Road, Mandi Village, Tehsil Mehrauli, New Delhi - 110047, India.