Intimation under Regulation 30 of the Securities and Exchange Board of India (Listing Obligations & Disclosure Requirements) Regulations, 2015 regarding the press release for Un-Audited Financial results for the quarter & half year ended 30th September 2026.

Date: 5th 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 Subject: Intimation under Regulation 30 of the Securities and Exchange Board of India (Listing Obligations and Disclosure Requirements) Regulations, 2015 regarding the press release for Un- Audited financial results for the quarter & half year ended 30th September 2026. Dear Sir/Ma’am, Pursuant to Regulation 30 of the Securities and Exchange Board of India (Listing Obligations and Disclosure Requirements), Regulations 2015, we are enclosing copy of press release for Un-Audited financial results for the quarter & half year ended 30th September 2026. 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) 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. Interarch Building Solutions Limited (Formerly known as Interarch Building Products Limited) New Delhi, November 05th, 2026: Interarch Building Solutions Limited (BSE Code: 544232) (NSE: INTERARCH), a leading player in the Pre-Engineered Building (PEB) Industry, announced its unaudited financial results for the quarter and half year ended 30th September 2026. Financial Summary: Particulars (INR Cr.) Q2FY27 Q2FY26 YoY (%) H1FY27 H1FY26 YoY (%) Revenue from operations 505.4 491.1 2.9% 965.0 871.9 10.7% EBITDA (excl. other 73.3 10.7% 41.7 41.7 0.1% 81.1 income) EBITDA Margin 8.3% 8.5% - 23 bps 8.4% 8.4% - PAT 30.7 32.3 -4.9% 58.9 60.7 -2.8% PAT Margin 6.1% 6.6% -50 bps 6.1% 7.0% -85 bps Basic EPS 18.27 19.25 35.11 36.17 Q2FY27 Financial Highlights:  Revenue from Operations increased by 2.9% YoY to INR 505 Cr in Q2 FY27, compared to INR 491 Cr in Q2 FY26.  EBITDA (excluding other income) remained flattish YoY at INR 42 Cr in Q2 FY27.  EBITDA margin for the quarter stood at 8.3% as against 8.5% in Q2 FY26.  Profit After Tax (PAT) stood at INR 31 Cr in Q2 FY27 versus INR 32 Cr in Q2 FY26 H1FY27 Financial Highlights:  Revenue from Operations increased by 10.7% YoY to INR 965 Cr in H1 FY27, compared to INR 872 Cr in H1 FY26.  EBITDA (excluding other income) rose to INR 81 Cr in H1 FY27 from INR 73 Cr in H1 FY26, also reflecting a YoY growth of 10.7%.  EBITDA margin for the period remained flattish YoY at 8.4%  Profit After Tax (PAT) declined marginally by 2.8% and stood at INR 59 Cr in H1 FY27.  Total order book as of October 31, 2026, stood at INR 2,011 Cr. Commenting on the company’s performance, Mr. Manish Garg, Managing Director & CEO, Interarch Building Solutions Ltd., said, “We delivered a steady performance in Q2FY27, in line with our expectations. Revenue from Operations grew 2.9% YoY to Rs. 505.4 crore, while EBITDA remained stable at Rs. 41.7 crore, with a margin of 8.3%. For H1FY27, revenue and EBITDA grew 10.7% YoY to Rs. 965.0 crore and Rs. 81.1 crore, respectively, reflecting the resilience of our business model and focus on operational excellence. While near-term challenges arising from external market conditions and the seasonal nature of the PEB industry may persist, customer enquiries across key end markets remain healthy. The long-term industry outlook remains encouraging, supported by private capex spending and India's manufacturing-led growth, creating opportunities across manufacturing, warehousing, renewable energy, data centres and commercial infrastructure. Our order book stood at an all-time high of Rs. 2,011 crore as of October 31, 2026, providing strong revenue visibility. We continue to focus on quality order inflows, prioritizing projects that align with our execution capabilities and profitability objectives. During the first half of FY27, we commissioned Phase 1 of our PEB facility at Kheda, Gujarat, and Phase 1 of our Heavy Steel Structures facility in Andhra Pradesh. These capacity additions will further enhance our manufacturing capabilities and strengthen our ability to undertake larger and more complex projects. Going forward, growth will be driven by our core PEB business, Heavy Steel Structures and exports. We expect execution momentum to improve in the second half, supported by our strong order book, healthy enquiry pipeline and expanded capacities. Backed by our integrated business model and robust balance sheet, we remain focused on sustainable, profitable growth and long-term value creation.” About Interarch Building Solutions Limited Interarch Pre-Engineered Buildings Interarch Building Solutions Limited commenced its operations in 1983. Today, 40 years later, Interarch is one of the leading turnkey pre-engineered steel construction solution providers in India with integrated facilities for design and engineering, manufacturing, on-site project management capabilities for the installation and erection of pre-engineered steel buildings. Interarch Life: Non-Industrial Buildings We offer a state-of-the-art solution for non-industrial buildings through our innovative load-bearing wall framing systems, crafted to support lightweight structures. Embracing a hassle-free drywall construction approach, these systems guarantee swift and efficient assembly, simplifying the construction process for our esteemed clients. With a focus on durability and safety, our load-bearing wall framing systems are engineered to be earthquake and termite-proof, providing robust protection for the structure and its occupants. Moreover, these systems offer the flexibility of dismantling if required, providing adaptability for future changes or modifications. These structures can be custom-made according to the specific plans, accommodating varying shapes, sizes, and designs to meet the exact needs of customers. TRACDEK® Metal Roofing & Cladding Systems We manufacture world-class pre-engineered roofing and cladding systems designed to meet custom requirements. Our extensive portfolio includes Hi-Rib Roofing & Cladding System, Klippon Roofing & Cladding System, and SS-2000 Standing Seam Roofing System. Each of these solutions is engineered to provide exceptional performance and durability, ensuring that we meet a wide range of needs with precision and reliability. Trac® Ceilings Our TRAC® range of metal ceilings are manufactured from fully recyclable materials and are pre- painted and prefabricated in our factory. The ceiling systems are friendly to handle and will not promote the growth of bacteria and fungi. TRAC® ceilings exhibit excellent corrosion resistance. They can withstand very high humidity (up to 100 %) and are suitable for use in outdoor applications. For more information, please contact: Interarch Building Solutions Ltd Investor Relations Advisors Strategic Growth Advisors Pvt. Ltd. CIN: L45201DL1983PLC017029 CIN - U74140MH2010PTC204285 Mr. Pushpendra Kumar Bansal Ms. Shaily Patwa/ Mr. Om Kanadia Email Id -pushpendra.bansal@interarchbuildings.com Email - shaily.p@sgapl.net Mobile No - 9810249084 /om.kanadia@sgapl.net www.interarchbuildings.com Mobile No – 9819494608 / 8454951156 www.sgapl.net Media Contact: Shweta Sharma PR & Corporate Communications Email Id- shweta.sharma@interarchbuildings.com Mobile No - 9582128481