Outcome of Board Meeting held on Wednesday, 04th November, 2026

Date: 04th November’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: Outcome of Board Meeting held on Wednesday, 04th November, 2026 Dear Sir/Madam, Pursuant to Regulations 30 and 33 of the SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015 (“Listing Regulations”), we wish to inform you that the Board of Directors of Interarch Building Solutions Limited (“the Company”), at its meeting held today, i.e., Wednesday, 04th November, 2026, has, inter alia, considered and approved the following matters: 1. Standalone Unaudited Financial Results for the Quarter Ended September 30, 2026 The Board of Directors considered and approved the Standalone Unaudited Financial Results of the Company for the quarter ended September 30, 2026, as reviewed and recommended by the Audit Committee. The Standalone Unaudited Financial Results, along with the Limited Review Report issued by the Statutory Auditors thereon, are enclosed herewith as Annexure-A. 2. Resignation of Ms. Sonali Bhagwati Dalal from the Position of Chairperson of the Board, while Continuing as a Non-Executive Independent Director of the Company The Board took note of the resignation tendered by Ms. Sonali Bhagwati Dalal from the position of Chairperson of the Board of Directors of the Company, with effect from the close of business hours on 04th November, 2026. Ms. Sonali Bhagwati Dalal shall continue to serve as a Non-Executive Independent Director of the Company and shall discharge her duties, responsibilities and obligations in such capacity in accordance with the applicable provisions of the Companies Act, 2013, the Listing Regulations and other applicable laws. 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. 3. Change in Designation and Elevation of Mr. Arvind Nanda from Managing Director to Whole- Time Director, designated as “ Executive Chairperson” of the Company Based on the recommendation of the Nomination and Remuneration Committee at its meeting held on 04th November, 2026, the Board of Directors of the Company considered and approved the change in designation and elevation of Mr. Arvind Nanda from Managing Director to Whole-Time Director, designated as “ Executive Chairperson” of the Company, with effect from 05th November, 2026, for a consecutive term of five (5) years, subject to the approval of the shareholders of the Company and such other approvals as may be necessary. 4. Change in Designation and Elevation of Mr. Manish Kumar Garg from Executive Director & CEO to Managing Director & CEO of the Company, along with Revised Remuneration Based on the recommendation of the Nomination and Remuneration Committee at its meeting held on 04th November, 2026, the Board of Directors of the Company considered and approved the change in designation and elevation of Mr. Manish Kumar Garg from Executive Director & CEO to Managing Director & CEO of the Company, with effect from 05th November, 2026, for a consecutive term of five (5) years, along with a revision in his remuneration, subject to the approval of the shareholders of the Company and such other approvals as may be necessary. You are requested to take the above information on record. The aforesaid outcome of the Board Meeting is also being made available on the Company's website at www.interarchbuildings.com. The meeting of the Board of Directors commenced at 03:30 P.M. (IST) and concluded at 04:23 P.M. (IST). Kindly take the above information on record and acknowledge receipt of the same. For INTERARCH BUILDING SOLUTIONS LIMITED (Formerly known as Interarch Building Products Limited) NIDHI KHANDELWAL COMPANY SECRETARY & COMPLIANCE OFFICER M.No.: A19279 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.