Mr. Antoine Calendrier reports

ATKINSREALIS ANNOUNCES RENEWAL OF NORMAL COURSE ISSUER BID

The Toronto Stock Exchange has approved the renewal of Atkinsrealis Group Inc.'s normal course issuer bid to purchase for cancellation up to 13,649,009 common shares of the company over the 12-month period commencing on March 17, 2026, and ending no later than March 16, 2027, representing approximately 10 per cent of Atkinsrealis's public float calculated as of March 3, 2026.

The company has established an automatic share purchase plan with its designated broker to facilitate the purchase of common shares under the NCIB during times when the company would ordinarily not be permitted to purchase due to regulatory restrictions or self-imposed blackout periods. Before entering a blackout period, the company may, but is not required to, instruct the broker to make purchases under the NCIB during such period based on limits set by the company in accordance with the automatic share purchase plan, TSX rules and applicable securities laws. The plan has been precleared by the TSX and will be implemented, effective March 17, 2026.

The company believes that, in the appropriate circumstances, the purchase of common shares would be an effective use of its funds and be in the best interests of the company and its shareholders.

The company will also be permitted to purchase its common shares from Caisse de depot et placement du Quebec in accordance with an exemption granted by the TSX in connection with the NCIB to enable the Caisse to maintain its current proportionate shareholding percentage as close as possible to 16.7 per cent of the issued and outstanding common shares and without increasing such proportionate shareholding. The maximum number of common shares that may be purchased pursuant to the NCIB will include the number of common shares purchased by the company from the Caisse.

Purchases from the Caisse will be made during the TSX's special trading session pursuant to an automatic disposition plan agreement between the broker, the company and the Caisse. As required by the ADP agreement, purchases from the Caisse will be made on trading days on which the company makes a purchase from other shareholders. In the event the Caisse does not sell common shares on any trading day as required by the terms of the ADP agreement (other than as a result of certain market disruption events), the TSX exemption will cease to apply, and the company will not be permitted to make any further purchases from the Caisse under the terms of the NCIB. Additionally, the ADP agreement will terminate automatically upon the Caisse selling any number of common shares other than pursuant to the ADP agreement, whether through the facilities of the TSX or otherwise.

All common shares purchased pursuant to the NCIB, including those purchased from the Caisse, will be cancelled. Within the limits as approved by the TSX, the timing, number and volume of purchases under the NCIB are subject to management's discretion based on various factors. These purchases are to be made through the facilities of the TSX or Canadian alternative trading systems in accordance with the TSX's policy on normal course issuer bids, or otherwise as may be permitted by applicable securities laws and regulations.

During the period that the NCIB is outstanding, the company does not intend to make purchases of its common shares other than by means of open market transactions or such other means as may be permitted by the securities regulatory authorities from time to time and as applicable, including block purchases of common shares. The company may also purchase shares privately from time to time after obtaining exemption orders from applicable securities regulatory authorities. Any such private purchase made under an exemption order issued by a securities regulatory authority will be at a discount from the prevailing market price, as provided in the exemption order.

On March 3, 2026, the company had 164,494,056 common shares issued and outstanding, of which 136,490,093 made up the public float. The average daily trading volume of the common shares through the facilities of the TSX over the past six completed calendar months was 604,472. Accordingly, under the TSX rules and policies, the company is entitled on any trading day to purchase up to 25 per cent of the ADTV, which totals 151,118 common shares, excluding common shares purchased from the Caisse pursuant to the ADP agreement, for the next 12-month period of the NCIB. The company may also purchase, once a week, a block of common shares not owned by any insiders, which may exceed the daily limit of 151,118 common shares in accordance with the TSX rules.

Under the company's normal course issuer bid approved in March, 2025, the company had received the approval of the TSX to purchase for cancellation a maximum of 13,945,331 common shares. As at the date of this press release, the company had purchased for cancellation 3,814,240 common shares under the 2025 NCIB through the facilities of the TSX and Canadian alternative trading systems, including 378,658 common shares held by the Caisse during the TSX's special trading session pursuant to the ADP agreement at a weighted-average price paid per common shares of approximately $84.11. Separately and not under the 2025 NCIB, the company repurchased seven million common shares from the Caisse in June, 2025, pursuant to an exemption granted by the Autorite des marches financiers, at a price of $90.87 per share, which was not included in the 2025 NCIB limits. Therefore, in the aggregate, the company repurchased for cancellation a total of 10,814,240 common shares under the 2025 NCIB and directly from the Caisse in June, 2025, thereby deploying an aggregate of approximately $957-million to effect such repurchases.

About Atkinsrealis Group Inc.

Created by the integration of long-standing organizations dating back to 1911, Atkinsrealis is a world-class engineering service and nuclear company dedicated to engineering a better future for the planet and its people. It creates sustainable solutions that connect people, data and technology to transform the world's infrastructure and energy systems. It 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 its capabilities are delivered to clients in strategic sectors such as engineering services, nuclear and capital.

We seek Safe Harbor.