Fusion Fuel Highlights Royal Uranium's 2% NSR on Shea Creek Project, One of Canada's Largest Undeveloped Uranium Resources in the Athabasca Basin

• Shea Creek uranium resource includes 67.57M lbs indicated + 28.06M lbs inferred U₃O₈
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  , operated by Orano Canada Inc. in a joint venture with Uranium Energy Corp.
• Part of a 16-uranium-royalty portfolio across the Athabasca Basin, Newfoundland, Colombia, and Argentina

Dublin, March 25, 2026 -- Fusion Fuel Green PLC (Nasdaq: HTOO) (“Fusion Fuel” or the “Company”), a leading provider of full-service energy engineering, advisory, and utility solutions, today highlighted information about its anticipated 2.0% Net Smelter Return (NSR) royalty on the Shea Creek project, part of a portfolio of royalty rights that the Company anticipates will be acquired upon the closing of its previously announced agreement with Royal Uranium Inc. (“Royal Uranium”).

The Shea Creek project, in the Western Athabasca area of northern Saskatchewan, Canada, encompasses uranium resources in Canada’s Western Athabasca Basin. Shea Creek is one of the largest undeveloped uranium resources in Canada’s Athabasca Basin. The project is operated by Orano Canada Inc., a subsidiary of French state-majority-owned nuclear fuel cycle company Orano SA, in a joint venture with Uranium Energy Corp. (“UEC”), benefiting from strong government-backed support and long-term demand driven by France’s nuclear energy program. The Western Athabasca Basin has attracted investment from some of the world’s largest nuclear energy companies and is believed to have strong expansion potential.

Four deposits — Kianna, Anne, Colette, and 58B — combine to form large undeveloped uranium resources in the Shea Creek project.

UEC has indicated that expansion potential remains very high, with 278,889 meters of drilling across 563 drill holes completed since 1992.

UEC’s 2022 Technical Support’s 2022 mineral resource estimate for the four deposits at a cut-off grade of 0.30% U

O total :

• 67.57 million pounds U₃O₈ indicated (2,056,000 tonnes grading 1.49% U₃O₈)
• 28.06 million pounds U₃O₈ inferred (1,254,000 tonnes grading 1.02% U₃O₈)

The 2.0% NSR royalty held by Royal Uranium is expected to provide a 2.0% return on any net revenue from the four Shea Creek deposits, less transportation and refining costs, without requiring the royalty holder to make further capital investments in exploration, development, or operations. The Shea Creek royalty is one of 16 uranium royalty interests anticipated to be acquired as part of the Royal Uranium transaction with assets located across the Athabasca Basin, Newfoundland, Colombia, and Argentina.

Global uranium demand is forecast to reach 397 million pounds by 2040 — a 118% increase from 2025 levels — while supply is projected to grow only 14%, creating an estimated annual deficit of approximately 197 million pounds by 2040.

This gap cannot be closed by existing producers alone. Development-stage resources, such as those in the Western Athabasca Basin, will be essential to meeting demand. Additionally, the Kazatomprom Group, the world's largest uranium producer, publicly flagged sulfuric acid shortages and construction delays during 2023–2025 that constrained planned production increases, contributing to a tighter-than-expected Western supply outlook over that period and increasing the geopolitical premium on Americas-based assets such as those in Saskatchewan.

“Shea Creek is one of the largest undeveloped uranium resources in Canada, operated by two of the industry's most experienced names. Through our anticipated acquisition of Royal Uranium, the holder of a 2.0% NSR royalty on the Shea Creek project deposits, we anticipate providing Fusion Fuel with a share of value generated without additional capital spend,” stated JP Backwell, Fusion Fuel CEO.

On February 18, 2026, Fusion Fuel announced that it had entered into a definitive share exchange agreement (“Share Exchange Agreement”) to acquire a controlling interest in Royal Uranium, a private royalty company holding a portfolio of 16 royalties across the Americas. The proposed transaction is intended to provide Fusion Fuel with exposure to energy commodity royalties from certain assets, particularly uranium and natural gas deposits, through a capital-efficient royalty portfolio.

Fusion Fuel Green PLC (NASDAQ: HTOO) provides integrated energy engineering, distribution, and green hydrogen solutions through its Al Shola Gas, BrightHy Solutions, and BioSteam Energy platforms. With operations spanning LPG supply to hydrogen and bio-steam solutions, the Company supports decarbonization across industrial, residential, and commercial sectors.

Royal Uranium is a private energy royalty entity holding a portfolio of tier one high-quality uranium and natural gas royalties across premier mining jurisdictions in the Americas, operated by experienced industry partners. The portfolio is designed to provide long-duration exposure to commodity price upside while minimizing operating risk through the royalty model.

2022 Technical Report on the Shea Creek Project, Saskatchewan,” effective October 31, 2022, filed by Uranium Energy Corp. with the U.S. Securities and Exchange Commission (“SEC”) on January 11, 2023. Mineral resources are not mineral reserves and do not have demonstrated economic viability.
“Uranium's Tale of Two Markets” (December 15, 2025),