Mr. Antoine Calendrier reports

ATKINSREALIS SUBMITS NOTICE OF INTENT TO U.S. NUCLEAR REGULATORY COMMISSION FOR Candu(TM) REACTOR LICENSING

Atkinsrealis Group Inc. has formally submitted a notice of intent to the U.S. Nuclear Regulatory Commission (NRC) to begin the licensing process for its Candu reactor technology in the United States.

The filing marks the start of formal preapplication engagement with the NRC and represents a key milestone in the company's strategy to deploy proven large-scale nuclear power in support of significant U.S. electricity demand driven by data centres, artificial intelligence, advanced manufacturing and broader electrification.

"As the United States enters a new chapter in its civilian nuclear program, Atkinsrealis is uniquely positioned, as the steward of Candu technology, to help advance the country's ambitious energy policy through proven, low-cost reactor technology with a world-class reputation," said Ian L. Edwards, president and chief executive officer, Atkinsrealis. "This notice of intent marks a critical milestone in the development of Candu's international market. It's also the first step in a process that supports our ambition to provide the U.S. with the reliable, affordable and safe large-scale nuclear power that is central to providing energy security and creating investment, jobs and economic opportunity in the country."

Atkinsrealis owns the exclusive commercial rights to the Candu technology, one of the world's most established large reactor platforms, with 34 units built globally and nearly 1,000 reactor years of experience. The enhanced Candu 6 design is a 700-plus-megawatt class pressurized heavy water reactor that uses natural uranium fuel and on-line refuelling, enabling continuous operation without shutdown for refuelling outages.

Unlike first-of-a-kind reactor concepts, Candu reactors have operated for decades across multiple jurisdictions -- Canada, Romania, Argentina, Korea, China -- and regulatory frameworks. The design incorporates two independent fast-acting shutdown systems and has demonstrated strong operational and safety performance internationally.

Candu technology also co-produces medical grade life-saving isotopes to sterilize medical equipment worldwide, and for use in both detecting and fighting cancer. Candu reactors in Canada produce 50 per cent of the world's supply of the Cobalt-60 isotope1.

The company is engaging U.S. utilities, state governments and prospective anchor power purchasers, including hyperscale data centre operators and large industrial users, to evaluate potential deployment opportunities. Atkinsrealis is focusing on existing nuclear sites and jurisdictions with supportive nuclear policy frameworks to reduce siting risk and accelerate timelines.

"Candu reactors strengthen U.S. energy security in a very tangible way as they use natural uranium and do not require enrichment, ultimately reducing reliance on foreign enrichment services," said Joe St. Julian, president, nuclear, Atkinsrealis. That fuel flexibility, combined with decades of on-time and on-budget performance, will give the United States greater control over its nuclear fuel supply chain, which is of paramount importance in the current geopolitical climate, while delivering dependable, low-carbon baseload power."

Atkinsrealis has over 40,000 employees around the world, including 7,000 nuclear professionals dedicated to its global nuclear business and provides end-to-end services across the nuclear life cycle, including new build, refurbishment, reactor support and waste management. The Canadian nuclear supply chain is composed of 250 companies and employs 90,000 professionals.

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 our planet and its people. The company creates sustainable solutions that connect people, data and technology to transform the world's infrastructure and energy systems. The company 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 advisory services. The breadth and depth of the company's capabilities are delivered to clients in strategic sectors such as engineering services and nuclear, as steward of Candu nuclear technology.

About Atkinsrealis' nuclear sector

Atkinsrealis has over 70 years of global nuclear expertise, delivering nuclear technology products and full-service solutions to nuclear utilities around the world. Atkinsrealis is the steward of Candu nuclear technology, operating on four continents, and provides advisory and engineering services to other nuclear developers. With an innovative technology portfolio, including access to over 500 patented solutions, Atkinsrealis solves technically complex challenges across the whole nuclear life cycle from design and new build through asset management and from life extension and late life management through decommissioning and waste management. Atkinsrealis operates and manages government nuclear research sites, transforming ageing infrastructure and safely managing legacy nuclear waste. Atkinsrealis's Candu technology also allows for the co-production of medical radioisotopes for cancer detection and treatment. The company also supports cancer treatment through its partnership with TerraPower to extract isotopes from legacy nuclear material.

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