Change in Management

Date: 18th August, 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 Subject: Intimation under Regulation 30 of the SEBI (Listing Obligations and Disclosure Requirements), Regulations 2015 – Resignation of Senior Management Personnel (SMP) Dear Sir/Ma’am Pursuant to Regulation 30 read with clause 7C of Para A of Part A of Schedule III of the SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015, we wish to inform you that Mr. Sumesh Sehgal, DGM – Safety of the Company has tendered notice of resignation dated 11th August, 2026 due to personal reasons. The Company has relieved him from the services w.e.f. close of business hours of 18th August, 2026. We are enclosing herewith the brief details of the changes as prescribed under SEBI Listing Regulations read with SEBI Master Circular No. HO/49/14/14(7)2025-CFD-POD2/I/3762/2026 dated January 30, 2026, as Annexure A. We request you to take this on record, and to treat the same as compliance with the applicable provisions of the SEBI Listing Regulations 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, GST No.09AAACI0106J1ZY Registered Office: Farm No-8, Khasra No. 56/23/2, Dera Mandi Road, Mandi Village, Tehsil Mehrauli, New Delhi - 110047, India. Annexure- A Relevant details as required under Regulation 30 of the SEBI Listing Regulations SEBI Master Circular No. HO/49/14/14(7)2025-CFD-POD2/I/3762/2026 dated January 30, 2026 S.No. Particular Details 1 Reason For Change viz. appointment, Resignation of Mr. Sumesh reappointment, resignation, removal, death or Sehgal from the post of DGM- otherwise Safety 2 Date of appointment / re-appointment / With effect from 18th cessation (as applicable) & term of August,2026-Resignation letter appointment/re-appointment attached 3 Brief profile (in case of appointment) Not Applicable 4 Disclosure of relationships between directors (in Not Applicable case of appointment of a director) 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, GST No.09AAACI0106J1ZY Registered Office: Farm No-8, Khasra No. 56/23/2, Dera Mandi Road, Mandi Village, Tehsil Mehrauli, New Delhi - 110047, India.