IRB Infrastructure Developers Limited — Capital/Financing Update 2026

Apr 1, 2026

April 1, 2026

To, Corporate Relationship Department, BSE Limited Phiroze Jeejeebhoy Towers Dalal Street, Mumbai 400 001

Listing Department, National Stock Exchange of India Limited Exchange Plaza, C-1 Block G, Bandra Kurla Complex, Bandra (E), Mumbai 400 051

Dear Sir / Ma’am,

Ref: Scrip Code: 532947, Symbol: IRB

Sub – Update in relation to TOT-18 Project.

In furtherance to our disclosure dated January 6, 2026, February 4, 2026, and March 24, 2026, please find attached a copy of an update provided by IRB Infrastructure Trust (the “Trust” ), the Associate of the Company in relation to TOT-18 Project.

Please find enclosed the Company’s press release in this regard.

You are requested to kindly take note of the same.

Thank you,

For IRB Infrastructure Developers Limited

Mehulkumar Digitally signed by Mehulkumar Natwarlal Natwarlal Patel Date: 2026.04.01 Patel 08:17:16 +05'30' Mehul Patel Company Secretary

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April 1, 2026

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To,

National Stock Exchange of India Limited

Exchange Plaza Plot no. C/1, G Block Bandra-Kurla Complex, Bandra (East) Mumbai 400051

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Dear Sir,

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NSE Symbol: IRBIT / Series: IV

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Subject: Receipt of Appointed Date & Commencement of toll collection TOT 18 Project

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We refer to our disclosures dated February 11, 2026, February 26, 2026, March 20, 2026 and March 24, 2026 with respect to investment in IRB Chandibhadra Tollway Private Limited, the Project SPV for implementation of the project of Tolling, Operation, Maintenance and Transfer of Chandikhole - Bhadrak Section of NH- 16 in the State of Odisha (From Km 62+000 to Km 136+500) (Bundle 18) TOT-18 Project , by the IRB Infrastructure Trust (the Trust).

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Please note that the Trust has achieved closing under the definitive agreements executed for implementation of TOT-18 Project. Further, the Project SPV has paid upfront Concession Fees of Rs. 3,087 Crores to the Competent Authority and has received April 1, 2026, as the Appointed Date, from the Competent Authority. Accordingly, the SPV has commenced toll collection on the Project w.e.f. April 1, 2026.

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Kindly take this update on record.

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For MMK Toll Road Private Limited

(in its capacity as Investment Manager to IRB Infrastructure Trust)

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Kaustubh Shevade

Company Secretary and Compliance Officer

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Press Release

IRB Infrastructure Trust’s Project SPV commences Tolling on Chandikhole Bhadrak Section (TOT-18) of NH-16 from today

• SPV made payment of Upfront Concession Fee of Rs.3,087Crs to NHAI after achieving Financial Closure; secures Tolling Rights for 20 years

Mumbai, April 1, 2026: IRB Chandibhadra Tollway Pvt. Ltd., a Project SPV of IRB Infrastructure Trust (An Associate of IRB Infrastructure Developers Ltd) has commenced Tolling on Chandikhole Bhadrak Section of NH-16 from today, 1[st] April 2026 at 00.00 Hrs, after receiving Appointed Date from NHAI.

The Project SPV made payment of Upfront Concession Fee of Rs.3,087Crs to NHAI on 30[th] March 2026 after achieving Financial Closure for the Project.

Commenting on the development, Mr. Virendra D. Mhaiskar, Chairman and Managing Director of IRB Group said, “We are pleased to unveil our strategic entry into Odisha, marking the Group’s presence in 13 Indian States, with the addition of Chandikhole–Bhadrak Section on NH-16 (TOT-18). Part of India’s prestigious Golden Quadrilateral, this high-potential corridor is a vital link between the Southern and Eastern regions, enabling safer, faster, and more efficient travel. The corridor also receives steady pilgrimage and tourism-linked traffic supporting regional growth”. He further said, “ We thank NHAI, our lenders - Union Bank of India - and our partners - GIC, Singapore and Ferrovial Group - for their continued support, and remain committed to delivering best-in-class services throughout the concession period. This project is expected to further strengthen our toll revenue growth.”

To reiterate, IRB Infrastructure Trust emerged as the highest bidder for the project and its Project SPV signed the Concession Agreement with NHAI on 4[th] February 2026 for Tolling and O&M of the project.

Key Highlights: TOT-18 Concession:

• 1[st] project in the State of Odisha (13[th] Indian State of Group’s Footprints Nation-wide)

• 74.5 Kms (447 Lane Kms) long corridor from Chandikhole to Bhadrak on NH-16

• Revenue Linked Concession Period of 20-years

• O&M Order Book rises by approx. Rs.1,600Crs

• The Asset forms part of the Golden Quadrilateral Corridor

About IRB Group:

IRB Group, comprising IRB Infrastructure Developers Ltd. (Sponsor), and two listed Infrastructure Investment Trusts (InvITs), i.e., IRB Infrastructure Trust (Private InvIT), and IRB InvIT Fund (Public InvIT), is India’s Leading and the Largest Toll Road Concessionaire with Assets Portfolio of 28 Highways with approx. 17,500 Operational Lane Kms and Asset Base of approx. Rs.94,000Crs spread across 13 Indian States.

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Press Release

As a Market Leader in India’s highway infrastructure development sector, IRB Group enjoys significant Market Share of 44% in the awarded TOT space, through 6 TOT Assets, followed by the largest BOT Portfolio of 18 Highway Assets and 4 Hybrid Annuity Highway Assets. The Group’s assets portfolio comprises approx. 16% share in India’s prestigious Golden Quadrilateral connectivity and 12% share in the North-South highway connectivity.

With the daily movement of around 1.5 million vehicles across all highway assets, the Group contributes around 10% in the National Toll Revenue, with robust 97% FASTag penetration through approx. 1,000 FASTag compliant lanes at 86 Toll Plazas existing at Group’s highway assets across the Nation.

IRB Infrastructure Trust (“Private InvIT”):

IRB Infrastructure Trust is an Infrastructure Investment Trust sponsored by IRB Infrastructure Developers Limited under the SEBI’s Infrastructure Investment Trusts Regulations 2014. Private InvIT, pursuant to the Concessions granted by the respective Nodal Agencies, operates and manages 14 highway assets having 10,674 Lane Kms and Enterprise Value of approx. Rs.66,000Crs in the States of Maharashtra, Rajasthan, Gujarat, Goa, Karnataka, Uttar Pradesh, West Bengal, Telangana, and Madhya Pradesh. The Weighted Average Life of these Assets is 20 Years plus. Private InvIT is listed on NSE since 2023 under ticker “IRBIT”. For more information on Private InvIT, please visit www.irbinfratrust.co.in

For further details, please contact:

• Tejal Divte, Concept PR, 99305 51440, tejal@conceptpr.com

• Vivek Devasthali, Head-Corporate Communications , 99300 80099, vivek.devasthali@irb.co.in

Disclaimer:

Except for the historical information contained herein, statements in this communication and any subsequent discussions, which include words or phrases such as ‘will’, ‘aim’, ‘will likely result’, ‘would’, ‘believe’, ‘may’, ‘expect’, ‘will continue’, ‘anticipate’, estimate’, ‘intend’, ‘plan’, ‘contemplate’, ‘seek to’, ‘future’, ‘objective’, ‘goal’, ‘likely’, ‘project’, ‘on-course’, ‘should’, ‘potential’, ‘pipeline’, ‘guidance’, ‘will pursue’ ‘trend line’ and similar expressions or variations of such expressions may constitute ‘forwardlooking statements’.

The forward-looking statements involve a number of risks, uncertainties and other factors that could cause actual results to differ materially from those suggested by the forward-looking statements.

These risks and uncertainties include but are not limited to the IRB Infrastructure Developers Limited and/ or its Associates’ ability to successfully implement its strategy, its growth and expansion plans, obtain regulatory approvals, provisioning policies, technological changes, investment and business income, cash flow projections, exposure to market risks as well as other risks. In addition, the consummation of the transactions described herein is subject to various conditions precedent.

IRB Infrastructure Developers Limited does not undertake any obligation to update forward-looking statements to reflect events or circumstances after the date thereof.

These materials are not a prospectus, a statement in lieu of a prospectus, an offering circular, an invitation or an advertisement or an offer document under the Indian Companies Act, 2013 together with the rules and regulations made thereunder, the Securities and Exchange Board of India (Issue of Capital and Disclosure Requirements) Regulations, 2009, as amended, or any other applicable law in India.

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