Mr. Harold Fortin reports

ATKINSREALIS COMPLETES SALE OF REMAINING 6.76% INTEREST IN HIGHWAY 407 ETR

Atkinsrealis Group Inc. has completed the previously announced transactions for the sale by Atkinsrealis of shares of 407 International Inc. with each of a subsidiary of Canada Pension Plan Investment Board and a subsidiary of Ferrovial SE under the share purchase agreement entered into by all of the parties, and that all closing steps have been initiated under the put and call agreement entered into by Atkinsrealis with Ferrovial, in each case in accordance with the financial terms and conditions of such agreements as disclosed by Atkinsrealis on March 13, 2025.

As a result of the deferred portion of the consideration under the share purchase agreement and the exercise of the call option under the put and call agreement both being exercised at the beginning of the 18 month postclosing window, total gross proceeds for these elements of the transaction were adjusted in line with the agreed formulas, and total proceeds for the complete sale of Atkinsrealis's 6.76-per-cent interest will be approximately $2.6-billion. Management now expects a low- to mid-single-digit percentage effective cash tax rate on the net gain on the sale through the use of the company's available non-capital losses.

Certain sale proceeds were received by Atkinsrealis at closing of the transactions under the share purchase agreement and all remaining proceeds under both agreements are expected to be paid to Atkinsrealis within the next three business days. Following the closing of the above-described transactions, Atkinsrealis will no longer hold any interest in Highway 407 ETR.

Atkinsrealis also announced today that, in connection with the closing of the sale transactions, it has repaid in full the $400-million principal that had been outstanding under its limited recourse loan agreement with a subsidiary of Caisse de depot et placement du Quebec and that such loan agreement has thus been terminated.

The remainder of the net proceeds from the transactions will be deployed in line with the company's capital allocation priorities outlined at its 2024 investor day, and based on what management and the board of directors believe would be in the best interests of the company and most accretive to shareholder value over time. This would include paying down indebtedness, potentially funding additional growth through small and mid-size acquisitions and returning capital to shareholders.

RBC Capital Markets is acting as financial adviser and Norton Rose Fulbright is acting as legal adviser to Atkinsrealis.

About Atkinsrealis Group Inc.

Created by the integration of long-standing organizations dating back to 1911, Atkinsrealis is a world-class engineering services and nuclear company dedicated to engineering a better future for the planet and its people. The company creates sustainable solutions that connect people, data and technology to transform the world's infrastructure and energy systems. Atkinsrealis deploys global capabilities locally to its clients and delivers unique end-to-end services across the whole life cycle of an asset, including: consulting, advisory and environmental services, intelligent networks and cybersecurity, design and engineering, procurement, project and construction management, operations and maintenance, decommissioning, and capital. The breadth and depth of the company's capabilities are delivered to clients in strategic sectors, such as engineering services, nuclear and capital.

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