Analysts/Institutional Investor Meet/Con. Call Updates

Date: 27th October, 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 Sub: Intimation pursuant to Regulation 30 of the SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015 — Q2 & H1 FY27 Earnings Call Dear Sir/ Madam, Pursuant to Regulation 30 of the SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015, as amended from time to time a conference call/Earning call with the Analysts/Investors for the Q2 & H1 FY 2026-27 in relation to the un-audited Financial Results is scheduled to be held on Friday November 06, 2026 at 12.30 P.M. as per the details attached The above information is also available on www.interarchbuildings.com. This is for your information and records. 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) Head 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. Q2 & H1FY27 Earnings Call Interarch Building Solutions Ltd. November 06, 2026 at 12:30 pm (IST) Ambit Capital cordially invites you to the Q2 & H1FY27 Earnings Call of Interarch Building Solutions Ltd. Company Representatives Mr. Arvind Nanda – Managing Director Mr. Manish Garg – Executive Director & Chief Executive Officer Mr. Viraj Nanda – Executive Director Mr. Pushpendra Kumar Bansal – Chief Financial Officer The teleconference will be moderated by Sudeep Bora, Institutional Equities, Ambit Capital. Conference Call Details Date: November 06, 2026 | Time: 12:30 pm (IST) Please join the conference via DiamondPass to avoid wait time. Please click here to register. +91 22 6280 1148 Primary Access Numbers +91 22 7115 8049 Singapore: 800 101 2045 Hong Kong: 800 964 448 International Toll Free Numbers USA: 1 866 746 2133 UK: 0 808 101 1573 We request you to dial in a few minutes prior to the scheduled time.