Seabridge Gold's KSM Project Named a Priority Project by the Province of British Columbia

Toronto, Ontario--(Newsfile Corp. - April 30, 2026) - Seabridge Gold Inc. (TSX:SEA) (NYSE:SA) ("Seabridge" or the "Company") announced today that the Province of British Columbia has designated Seabridge's KSM Project as a provincial priority project. The designation is designed to advance strategic, job-creating developments across British Columbia. Inclusion on the priority project list provides KSM with dedicated provincial permitting coordination and support which is expected to streamline and expedite permitting timelines for the Project.

The KSM Project is one of the world's largest undeveloped copper and gold projects, hosting 7.3 billion pounds of copper and 47.3 million ounces of gold in proven and probable reserves (2.29 billion tonnes grading 0.64 grams per tonne gold and .14% copper), positioning it as a significant long-term source of critical minerals essential for electrification and the global energy transition. The Province's decision reflects KSM's scale, long-term economic potential, and alignment with the objectives of the Look West strategy, which focuses on delivering major projects, strengthening economic security, and supporting the responsible development of British Columbia's natural resources.

Seabridge Chair and CEO Rudi Fronk commented: "Recognition of KSM as a provincial priority project reflects the quality of the work completed to date and the value KSM represents for British Columbia and Canada. Dedicated permitting support will ensure that the significant effort invested by our team, our First Nation partners, local communities and government agencies evolves into a responsible and rewarding development."

Mr. Fronk added: "We will continue to work closely with local communities and Indigenous groups that have long supported KSM, including Nisga'a Lisims Government, Tahltan Central Government, and Gitxsan Hereditary Chiefs Office. We remain committed to respectful, transparent engagement with them as the project advances."

About Seabridge Gold
Seabridge Gold holds a 100% interest in several North American gold projects. Its principal assets are the KSM and Bronson Corridor projects in British Columbia's Golden Triangle. Additional projects include Courageous Lake in the Northwest Territories, Snowstorm in Nevada's Getchell Gold Belt, and the 3 Aces project in the Yukon. Further information on Seabridge's mineral reserves and resources is available at www.seabridgegold.com.

Neither the Toronto Stock Exchange, New York Stock Exchange, nor their Regulation Services Providers accepts responsibility for the adequacy or accuracy of this release.

Cautionary note to U.S. Investors concerning estimates of Mineral Reserves and Mineral Resources

All mineral reserve estimates reported by Seabridge were estimated in accordance with the Canadian National Instrument 43-101 and the Canadian Institute of Mining, Metallurgy and Petroleum ("CIM") Definition Standards (May 10, 2014). Since 2021 the U.S. Securities and Exchange Commission ("SEC") recognizes estimates of "measured mineral resources," "indicated mineral resources" and "inferred mineral resources" and uses new definitions of "proven mineral reserves" and "probable mineral reserves" and the supporting mining studies that are substantially similar to the corresponding CIM Definition Standards. However, the CIM Definition Standards differ from the requirements applicable to US domestic issuers.

Cautionary Note Regarding Forward-Looking Information

This document contains "forward-looking information" within the meaning of Canadian securities legislation and "forward-looking statements" within the meaning of the United States Private Securities Litigation Reform Act of 1995. This information and these statements, referred to herein as "forward-looking statements" are made as of the date of this document. Forward-looking statements include the estimated amount and grade of mineral reserves.

All forward-looking statements are based on Seabridge's or its consultants' current beliefs as well as various assumptions made by them and information currently available to them. The most significant assumptions include: (i) the presence of and continuity of metals at the Project at estimated grades; (ii) the geotechnical and metallurgical characteristics of rock conforming to sampled results; (iii) the quantities of water and the quality of the water that must be diverted or treated during mining operations; (iv) the capacities and durability of various machinery and equipment; (v) the availability of personnel, machinery, equipment at estimated prices and within the estimated delivery times; (v) currency exchange rates; (vi) metals sales prices; (vii) appropriate discount rates applied to the cash flows in the economic analysis; (viii) tax rates and royalty rates applicable to the proposed mining operation; (ix) the availability of acceptable financing under assumed structure and costs; (ix) anticipated mining losses and dilution; (x) metallurgical performance; (xi) reasonable contingency requirements; (xii) success in realizing proposed operations; (xiii) receipt of permits and other regulatory approvals on acceptable terms; and (xiv) the successful conclusion of consultation with impacted indigenous groups.

By their very nature, forward-looking statements involve inherent risks and uncertainties, both general and specific, and risks exist that estimates, forecasts, projections and other forward-looking statements will not be achieved or that assumptions do not reflect future experience. We caution readers not to place undue reliance on these forward-looking statements as a number of important factors could cause the actual outcomes to differ materially from the beliefs, plans, objectives, expectations, anticipations, estimates assumptions and intentions expressed in such forward-looking statements. These risk factors may be generally stated as the risk that the underlying assumptions do not occur as forecast, but specifically include, without limitation: risks relating to variations in the mineral content within the material identified as mineral reserves or mineral resources from that predicted; variations in rates of recovery and extraction; the geotechnical characteristics of the rock mined or through which infrastructure is built differing from that predicted, the quantity of water that will need to be diverted or treated during mining operations being different from what is expected to be encountered during mining operations or post closure, or the rate of flow of the water being different; developments in world metals markets; risks relating to fluctuations in the Canadian dollar relative to the US dollar; increases in the estimated capital and operating costs or unanticipated costs; difficulties attracting the necessary work force; and risks relating to the costs of other energy sources; increases in financing costs or adverse changes to the terms of available financing, if any; tax rates or royalties being greater than assumed; changes in development or mining plans due to changes in logistical, technical or other factors; changes in project parameters as plans continue to be refined; risks relating to receipt of regulatory approvals or the conclusion of successful consultation with impacted indigenous groups; changes in regulations applying to the development, operation, and closure of mining operations from what currently exists; the effects of competition in the markets in which Seabridge operates; operational and infrastructure risks and the additional risks described in Seabridge's Annual Information Form filed with SEDAR in Canada (available at www.sedar.com) for the year ended December 31, 2025 and in Seabridge's Annual Report Form 40-F filed with the U.S. Securities and Exchange Commission on EDGAR (available at www.sec.gov/edgar.shtml). Seabridge cautions that the foregoing list of factors that may affect future results is not exhaustive.

When relying on our forward-looking statements to make decisions with respect to Seabridge, investors and others should carefully consider the foregoing factors and other uncertainties and potential events. Seabridge does not undertake to update any forward-looking statement, whether written or oral, that may be made from time to time by Seabridge or on our behalf, except as required by law.

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