Mr. John Beck reports

AECON ANNOUNCES VOTING RESULTS OF ANNUAL GENERAL MEETING

The nominees listed in the management information circular dated May 5, 2025, have been elected as directors of Aecon Group Inc., to hold office until the close of the next annual general meeting of the corporation or until their successors are appointed.

As disclosed, Monica Sloan did not stand for re-election and has retired from Aecon's board. During her time on the board, Ms. Sloan served as a member of the corporate governance and nominating committee, the environmental, health and safety committee, and the operational, environmental and safety risk committee.

"On behalf of my fellow members of the board and Aecon's management, we thank Monica for her 12 years of valuable service and steadfast commitment to sound governance and delivering shareholder value," said John M. Beck, chairman, Aecon Group.

Shareholders also adopted all other resolutions submitted for their approval, as disclosed in the management information circular dated May 5, 2025, including the advisory vote on the corporation's approach to executive compensation, and the reappointment of PricewaterhouseCoopers LLP as the auditor of the corporation to hold office until the close of the next annual meeting of the corporation and that the board of directors be authorized to fix the auditor's remuneration.

The complete voting results for each item of business are provided in the attached tables.

Dividend

Aecon's board of directors approved the company's next quarterly dividend of 19 cents per common share. The dividend will be paid on July 3, 2025, to shareholders of record as of June 23, 2025. Unless indicated otherwise, all common share dividends paid by Aecon to shareholders are designated as eligible dividends for the purpose of the Income Tax Act (Canada) and any similar provincial legislation.

About Aecon Group Inc.

Aecon is a North American construction and infrastructure development company with global experience. Aecon delivers integrated solutions to private- and public-sector clients through its construction segment in the civil, urban transportation, nuclear, utility and industrial sectors, and provides project development, financing, investment, management, and operations and maintenance services through its concessions segment.

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