Please find attached Unaudited Financial Results for the quarter ended June 30, 2026.

HI: I: HCC/SEC/RESULT /2026 August 6, 2026 BSE Limited National Stock Exchange of India Ltd. The Corporate Relationship Dept, Exchange Plaza, Phiroze Jeejeebhoy Towers, Bandra-Kurla Complex, Dalal Street, Bandra (East), Mumbai-400 001 Mumbai-400 051 Scrip Code: 500185, 974246, 974247 Symbol : HCC 974 249 & 974 250 Dear Sir I Madam, Sub : Unaudited Financial Results for the quarter ended June 30, 2026 As per Regulations 33 and 52 of the Securities and Exchange Board of India (Listing Obligations and Disclosure Requirements) Regulations, 2015, we are enclosing the Unaudited Standalone and Consolidated Financial Results of the Company for the quarter ended June 30, 2026 which were approved and taken on record by the Board of Directors of the Company at its Meeting held today i.e. August 6, 2026 along with Limited Review Reports thereon submitted by the Statutory Auditors. A copy of the press release is also enclosed. The Meeting of the Board of Directors of the Company commenced at 1:30 p.m. and concluded at 4:10p.m. We request you to kindly take the above on record. Yours sincerely, For Hindustan Construction Company Ltd. Nitesh Kumar Jha Company Secretary Encl.: As above Hindustan Construction Co Ltd Hincon House, LBS Marg, Vikhroli (West). Mumbai -400 083, India Tel: +91 22 2575 1000 Fax: +91 22 2577 7568 CIN : L45200MH 1926PLC001 228 www .hccindia.com Press Release HCC reports Net Profit of f37 Cr for Q1 FY27 Construction Business records turnover of ~982 Cr in Q1 FY27 Mumbai: August 6, 2026: HCC's standalone E&C business recorded a turnover of ~981.7 crore and a net profit of ~37.1 crore in 01 FY27, compared with ~1 ,069.0 crore and ~38.6 crore, respectively, in the corresponding quarter of the previous year. On a consolidated basis, revenue stood at ~993.4 crore in 01 FY27, compared with ~1 ,091.3 crore in 01 FY26, while consolidated profit improved marginally to ~51.1 crore from ~50.7 crore in the corresponding quarter of the previous year. Financial highlights- HCC unaudited standalone results - Turnover of ~981. 7 crore in 01 FY27 versus ~1 ,069 crore in 01 FY26 - Net Profit of ~37.1 crore in 01 FY27 versus ~38.6 crore in 01 FY26 - EBITDA margins at 10.7% in 01 FY27 compared to 14.9% in 01 FY26 During the quarter, HCC secured a new order worth ~125 crore and emerged as the lowest bidder (L 1) for projects valued at ~2. 124 crore (HCC's share ~1.671 crore). In addition, bids aggregating approximately ~9.997 crore remain under evaluation. Execution across HCC's project portfolio remained on track during the quarter. The Company achieved breakthrough of the Head Race Tunnel (HRT) Faces 2 and 3 for the 520 MW Tapovan Vishnugad Hydroelectric Project. At the 1,000 MW Vishnugad Pipalkoti Hydroelectric Project, the Machine Hall for Units 1 and 2 was handed over, while HRT excavation reached 85%. Earthworks and steel liner fabrication also progressed at the Bhivpuri Pumped Storage Project. In the metro and transport segment, TBM deployment commenced at the ·Indore Metro project, alongside piling, station excavation and launch preparations. Patna Metro saw progress in casting yard development and guide wall works, with segment casting commencing and TBM deliveries scheduled later this year. Piling, pier and segment casting works also advanced on the Agardanda Creek Bridge. In the industrial segment, Hindalco's Aditya Aluminium Smelter expansion project received approval for the first pot shell prototype, enabling the commencement of bulk fabrication. And in the nuclear vertical, HCC continued to execute the Fast Reactor Fuel Cycle Facility, having recently completed the delivery of Rajasthan Atomic Power Project Units 7 & 8. About HCC: ('. HCC is a business group developing and building responsible infrastructure through next practices. With an ~ engineering heritage of 100 years, HCC has executed a majority of India's landmark infrastructure projects, having constructed 26% of India's Hydro Power generation and 60% of India's Nuclear Power generation capacities, over 4,036 lane km of Expressways and Highways, more than 402 km of complex Tunnelling and 403 Bridges. Today, HCC serves the infrastructure sectors of Transportation, Power and Water. Hindustan Construction Co Ltd Hincon House, LBS Marg, Vikhroli (West). Mumbai -400 083, India Tel : +91 22 2575 1000 Fax : +91 22 2577 7568 CIN : L45200MH1926PLC001228 www.hccindia.com 2nd Floor. Kapur House, Paranjape B Scheme Road No.1, Vile Parle (E), MUKUND Mumbai 400057 M. CHITALE T: 91 22 2663 3500 www. mmchitale.com &CO. CHARTERED ACCOUNTANTS Independent Auditor's Review Report on Standalone Unaudited Financial Results of the Company pursuant to the Regulation 33 and Regulation 52 read with Regulation 63 of the SEBI (listing Obligations and Disclosure Requirements) Regulations, 2015 (as amended) TO THE BOARD OF DIRECTORS OF Hindustan Construction Company Limited 1. We have reviewed the accompanying Statement of Standalone Unaudited Financial Results of Hindustan Construction Company Limited (hereinafter referred to as 'the Company') which includes the interim financial information of ten joint operations consolidated on proportionate basis as listed in paragraph 5 below, for the quarter ended June 30, 2026 ('the Statement') , attached herewith, being submitted by the Company pursuant to the requirement of Regulation 33 and Regulation 52 read with Regulation 63(2) of the SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015, as amended ('Listing Regulations'). Attention is drawn to the fact in Note 4 to the Statement regarding 'total balance value of work on hand; as at June 30, 2026, as included in the Statement has been approved by the Company's Board of Directors, but which is not required to be subject to audit or review. 2. This Statement, which is the responsibility of the Company's Management and approved by the Company's Board of Directors, has been prepared in accordance with the recognition and measurement principles laid down in the Indian Accounting Standard 34 "Interim Financial Reporting" ("lnd AS 34"), prescribed under Section 133 of the Companies Act, 2013 read with relevant rules issued thereunder and other accounting principles generally accepted in India and in compliance with Regulation 33 and Regulation 52 read with Regulation 63(2) of the SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015 as amended. Our responsibility is to express a conclusion on the Statement based on our review. 3. We conducted our review of the Statement in accordance with the Standard on Review Engagements (SRE) 2410 'Review of Interim Financial Information Performed by the Independent Auditor of the Entity', issued by the Institute of Chartered Accountants of India (I CAl). A review of interim financial information consists of making inquiries, primarily of the Company's personnel responsible for financial and accounting matters and applying analytical and other review procedures. A review is substantially less in scope than an audit conducted in accordance with Standards on Auditing specified under section 143(1 0) of the Companies Act, 2013 and consequently does not enable us to obtain assurance that we would become aware of all significant matters that might be identified in an audit. Accordingly, we do not express an audit opinion. 4. We have also performed procedures in accordance with the circular issued by the SEBI under Regulation 33(8) of the SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015, as amended, to the extent applicable 5. The St a te men t.1 nc Iu d es t he resu ts o f t he f o II ow1ng Jo1. nt 0 perat1ons. Sr. No. Name of the Entity 1 HCC TPL Indore Metro Joint Venture 2 TPL-HCC Bhivpuri PSP Joint Venture 3 HCC- HDC Joint Venture 4 Kumagai - Skanska - HCC - ltochu Group 5 HCC- L& T Purulia Joint Venture MUKUND M. CHITALE &CO. CHARTERED ACCOUNTANTS 6 Alpine - Samsung - HCC Joint Venture 7 Nathpa Jhakari Joint Venture 8 Alpine [Showing first 8,000 characters — download PDF for full document]