Indigrid Infrastructure Trust has informed the Exchange regarding Credit rating Review on 12/08/2026

INDIGRID INVESTMENT MANAGERS LIMITED Date- August 13, 2026 BSE Limited National Stock Exchange of India Limited Department of Corporate Services Listing Department Phiroze Jeejeebhoy Towers Exchange Plaza, C/1, Block G, Dalal Street, Mumbai - 400001, Bandra-Kurla Complex, Bandra (East), Maharashtra, India Mumbai — 400051, Maharashtra, India Security Code - 540565 Symbol - INDIGRID Subject: Credit Rating of IndiGrid Infrastructure Trust on August 12, 2026 Dear Sir/ Madam, Pursuant to Regulation 20, 23 of the Securities and Exchange Board of India (“SEBI”) (Infrastructure Investment Trusts) Regulations, 2014, as amended from time to time, Chapter 4 of SEBI Master Circular No. SEBI/HO/DDHS-PoD-2/P/CIR/2025/102 dated July 11, 2025 and other applicable laws and regulations, this is to inform you that IndiGrid Infrastructure Trust has received the following ratings from CRISIL Ratings Limited and ICRA Limited on August 12, 2026: Name of Amount Link to Credit Instrument (In INR Rating assigned Outlook Rating Action Rating Press Rating Type Crore) Release Agency Long Term Rating- Crisil AAA Bank Loan 5,120 Stable Reaffirmed Short Term Rating CRISIL - Crisil A1+ CRISIL Ratings Non- Ratings 14017.3 Limited Convertible Crisil AAA Stable Reaffirmed Limited Debentures Non- Convertible 300 Crisil AAA Stable Assigned Debentures Non- Convertible 10790 ICRA AAA Stable Reaffirmed Debentures Proposed Non- 300 ICRA AAA Stable Assigned Convertible Debentures ICRA Proposed ICRA Limited Limited Non- 800 ICRA AAA Stable Reaffirmed Convertible Debentures Term Loan 950 ICRA AAA Stable Reaffirmed Long- ICRA AAA/ ICRA 10 Stable Reaffirmed Term/Short- A1+ 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 INDIGRID INVESTMENT MANAGERS LIMITED Term – Fund- Based – Overdraft Short-Term – Non-Fund 40 ICRA A1+ - Reaffirmed Based – Bank Guarantee Short-Term – Non-Fund 200 ICRA A1+ - Reaffirmed Based – Others Commercial 500 ICRA A1+ - Reaffirmed Paper Issuer Rating - ICRA AAA Stable Reaffirmed The rating rationale can be accessed through the link below on the Credit Rating Agencies’ website. Link to CRISIL Ratings Limited’s website: CRISIL Ratings Limited Link to ICRA Limited’s website: ICRA Limited You are requested to kindly take the same on record. Thanking you, For IndiGrid Investment Managers Limited (Acting as the Investment Manager of IndiGrid Infrastructure Trust) Urmil Shah Company Secretary & Compliance Officer ACS – 23423 Copy→ 1. Axis Trustee Services Limited The Ruby, 2nd Floor, SW 29 Senapati Bapat Marg, Dadar West, Mumbai- 400 028 Maharashtra, India 2. IDBI Trusteeship Services Limited Universal Insurance Building, Ground Floor, Sir P.M. Road, Fort, Mumbai – 400001 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