Indigrid Infrastructure Trust has informed the Exchange regarding Disclosure of material issue

INDIGRID INVESTMENT MANAGERS LIMITED Date: September 26, 2026 B S E Limited National Stock Exchange of India Ltd Department of Corporate Services Listing Department Phiroze Jeejeebhoy Towers Exchange Plaza, C/1, Block G, Bandra-Kurla Dalal Street, Mumbai — 400 001 Complex, Bandra (East), Mumbai — 400 051 Security Code- 540565 Symbol- INDIGRID Sub: Submission of “Sustainability Report” for the Financial Year 2025-26 Dear Sir/ Madam, Pursuant to applicable provisions of the Securities and Exchange Board of India (Infrastructure Investment Trusts) Regulations, 2014, as amended from time to time read with circulars and guidelines issued thereunder (“InvIT Regulations”), and other applicable laws and regulations, we hereby submit the “Sustainability Report” of IndiGrid Infrastructure Trust (“IndiGrid”) for the financial year 2025-26. You are requested to take the same on your record. Yours sincerely, For and on behalf of IndiGrid Investment Managers Limited Representing IndiGrid Infrastructure Trust as its Investment Manager Urmil Shah Company Secretary & Compliance Officer ACS-23423 Axis Trustee Services Limited The Ruby, 2nd Floor, SW 29 Senapati Bapat Marg, Dadar West, Mumbai 400 028, Maharashtra, India IndiGrid Investment Managers Limited Registered & Corporate Office: Unit No. 101, First Floor, Windsor, Village KoleKalyan, off CST Road, Vidyanagari Marg, Kalina, Santacruz (East), Mumbai – 400 098, Maharashtra, India CIN: U28113MH2010PLC308857 Ph: +91 72084 93885 | Email: complianceofficer@indigrid.com | www.indigrid.co.in Infrastructure that Endures. Sustainability that Leads. India’s energy transition is no longer a future ambition; it is an infrastructure challenge being solved in real time. Sustainability at IndiGrid is not a reporting layer. It is a strategic lens through which growth is planned, With over 283 GW of non-fossil fuel capacity already operational and a national target of 500 GW by 2030, the scale assets are managed, and value is created. This year, IndiGrid initiated its first comprehensive climate risk of transformation underway is unprecedented. As India advances towards its broader climate commitments and assessment, expanded its GHG inventory to include Scope 3 emissions, and set a clear ambition to achieve long-term net zero pathway, the pace of renewable integration demands transmission networks, storage systems, No Net Loss of biodiversity across applicable sites. On the ground, rooftop solar across five substations and grid infrastructure that can operate reliably across decades. generated over 1,304 MWh of clean energy, robotic PV cleaning delivered annual water savings of over 51,000 KL, and responsible scrap management reinforced circularity within operations. The infrastructure being built today must be engineered not only for performance but for permanence, resilience against climate variability, adaptable to evolving grid architectures, and capable of supporting an energy system The organisation that operates this infrastructure grew equally stronger. The workforce expanded by nearly that grows more complex with each passing year. 18%, female representation increased by 24%, and employee attrition reduced from 20% to 17%. Through CSR initiatives, IndiGrid reached over 57,500 beneficiaries across 14 states, investing in education, healthcare, and IndiGrid operates at the centre of this transition. As India’s first and largest power sector InvIT, our portfolio has livelihood creation. This reinforces a central belief that infrastructure development must also contribute to grown to encompass 47 power assets across operational and under-construction, consisting of 55 transmission lines inclusive social progress. spanning approximately 9,698 circuit kilometres, 18 substations with ~32,550 MVA of transformation capacity, 1.5 GWp of solar generation capacity, and 2.5 GWh of battery energy storage, across 20 States and 2 Union Territories. Infrastructure that endures is sustained by people, systems, and values that hold under pressure. During FY 2025–26, IndiGrid enabled the integration of over 2,132 million units of renewable energy into the national grid, helping avoid more than 1.51 million tonnes of carbon emissions. Sustainability that leads is demonstrated not through ambition Endurance, however, is proven not through scale but through the consistency of daily performance, in the 99.61% alone but through the quality of execution, the discipline of availability maintained across transmission assets, in the Zero Harm safety record that delivered an LTIFR of 0.07 (employees), and in the digital backbone of DigiGrid and AI-led analytics that convert operational data into faster, performance, and the ability to embed ESG into every dimension of sharper decisions. These reflect an operating philosophy where reliability, safety, and technological readiness are how we build, operate, and grow. inseparable dimensions of infrastructure built to last. 2 IndiGrid Infrastructure Trust SSuussttaaiinnaabbiilliittyy RReeppoorrtt FFYY 22002255--2266 33 Powering Sustainability People Powering Sustainability People Introduction Governance Environment Community Introduction Governance Environment Community India Strategy First India Strategy First Table of Content Introduction 06 Powering India 16 Sustainability Strategy 36 People First 111 Our Sustainability Reporting Approach 06 Our Performance 16 Engaging Stakeholders, Empowering People 111 Defining Priorities About the Report 06 ESG Goals and Targets 16 Human Capital Development 114 Stakeholder Engagement 36 Reporting Scope and Boundary 08 Key ESG Performance Highlights 18 Diversity and Equal Opportunity 126 Materiality Assessment 40 Frameworks and Standards Used 08 IndiGrid at a Glance 19 Health, Safety and Well-being 132 Restatement of Information 08 Our Growth Journey, Powering 19 Governance 42 India Through IndiGrid Community 143 External Assurance 08 Our Business Offering 22 Built on Trust, Guided by Governance 43 Responsibility Statement 08 Rooted in Communities 143 Pioneering Innovation 32 Corporate Governance 46 Forward-looking Statement 08 Corporate Social Responsibility 145 Business Ethics 60 Feedback 08 Regulatory Compliance 63 Annexure 162 Leadership Messages 10 Responsible Investments 64 GRI Content Index 162 Message from the Managing Director Grid Resiliency 67 IFC Performance Standards 166 Message from the Chief 12 Data Security and Privacy 68 UN SDGs Alignment 167 Operating Officer Technology and Innovation 70 Assurance Statement 170 Message from the Chief Human Responsible Value Chain 72 Resource Officer Environment 74 Environment Stewardship 74 Climate Change Management 77 Energy Management and GHG Emissions 78 Opportunities in Renewable Energy 86 Biodiversity and Land Use Management 90 Water Management 100 Waste Management 104 44 IndiGrid Infrastructure Trust Sustainability Report FY 2025-26 55 Powering Sustainability People Powering Sustainability People Introduction Governance Environment Community Introduction Governance Environment Community India Strategy First India Strategy First Our Sustainability Reporting Approach About the Report We are proud to present IndiGrid’s and progress achieved during the year, Sustainability Report for the financial year highlighting how we create positive April 1, 2025, to March 31, 2026 (FY 2025- outcomes for our employees, stakeholders, 26), capturing our performance across communities, and the environment. As Environmental, Social, and Governance part of our enhanced approach, we have (ESG) dimensions. This report reflects the undertaken a comprehensive materiality continued evolution of our commitment assessment, involving structured to transparency, accountability, and engagement with both internal and responsible business practices. external stakeholders. This process enabled us to systematically identify, evaluate, As a key enabler of India’s energy and prioritise ESG topics based on their transition, IndiGrid remains [Showing first 8,000 characters — download PDF for full document]