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SEA.TO ·

Decision to Issue Construction Permits for Seabridge Gold’s KSM Mitchell Treaty Tunnels Delayed

Mine Development & Operations Permits & Approvals

106 Front Street East, Suite 400, Toronto, ON M5A 1E1, Canada

416-367-9292 www.seabridgegold.com

News Release

Trading Symbols: TSX: SEA FOR IMMEDIATE RELEASE

NYSE: SA April 10, 2026

Decision to Issue Construction Permits for Seabridge Gold’s KSM

Mitchell Treaty Tunnels Delayed

Toronto, Canada - Seabridge Gold Inc. (“Seabridge” or the “Company”) (TSX:SEA) (NYSE:SA)

announces today that it has received a letter from the Ministry of Mining and Critical

Minerals of British Columbia (the “Ministry”) advising that a decision to issue permit

amendments for construction and operation of the Mitchell Treaty Tunnel s (“MTT”) over

their full length (the “MTT Authorization”) has been delayed.

The MTT are an important infrastructure component of the KSM Project consisting of two

parallel tunnels connecting the mining operations in the Mitchell Valley with the

processing operations in the Treaty Valley . Approximately 12.5 kilometres of the MTT will

pass through mineral claims owned by a third party, Tudor Gold Corp. (“Tudor”). Seabridge

holds a Licence of Occupation for the MTT route and authoriz ations to construct the MTT

portals at three sites and approximately 100 metres of tunnel length at each portal location

(including over areas of mineral claims owned by Tudor).

The decision-maker reviewing the application for the MTT Authorization has referenced a

legal action commenced by Tudor challenging whether KSM’s conditional mineral reserve

(the “CMR”) for the MTT applies to Tudor’s mineral claims. The question is whether the CMR

applies to mineral claims that pre-existed the CMR. The terms of the CMR for the MTT state

that “A free miner must not obstruct, endanger, or interfere with the construction,

operation, or maintenance of [the MTT]”. The Ministry had previously confirmed on multiple

occasions in writing that the CMR applies to Tudor’s mineral claims. The decision-maker

has advised the Company that he is not going to make a decision on its permit

amendment application until the legal issue is resolved.

Seabridge Chair and CEO Rudi Fronk commented: “We are confident that the CMR is a

means by which the BC government can legally reserve land for construction of

infrastructure like the MTT over government owned lands, including lands subject to third-

party mineral claims such as Tudor’s. KSM has been determined to be in the best interests

of the Province of BC on numerous occasions.” Mr. Fronk noted that there are no plans to

commence construction of the MTT until a Final Feasibility Study has been completed.

Mr. Fronk also stated , “We have always been clear that if Tudor has an approved and

permitted mine plan for its Goldstorm Project, then we are willing to sit down and find an

amicable solution to the MTT issue. However, a greeing to move the MTT route before

Tudor has a defined project makes no sense.”

About Seabridge Gold

Seabridge Gold holds a 100% interest in several North American gold projects. Its principal

assets are the KSM and Iskut 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.

Forward Looking Statements

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 herein relate to Seabridge being confident that the conditional mineral

reserve (CMR) permits the government to legally reserve land for construction of infrastructure over lands subject to

third party mineral claims, such as Tudor's.

All forward-looking statements are based on Seabridge's or its advisors’ current beliefs as well as various assumptions

made by them and information currently available to them. Although management considers these assumptions to be

reasonable based on information currently available to it, they may prove to be incorrect.

Forward-looking statements involve various risks and uncertainties. There can be no assurance that such statements will

prove to be accurate and actual results and future events could differ materially from those anticipated in such

statements. Important factors that could cause actual results to differ materially from Seabridge's plans or expectations

include the risk that the government, or a court, determines that the CMR does not permit the government to authorize

the construction of the MTT over pre-existing third party mineral claims, as well as other risks outlined in statements

made by Seabridge from time to time in the filings made by Seabridge with securities regulators. Seabridge disclaims

any intention or obligation to update or revise any forward -looking statements whether as a result of new information,

future events or otherwise, except as otherwise required by applicable securities legislation.

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.

ON BEHALF OF THE BOARD

"Rudi Fronk"

Chair & C.E.O.

For further information please contact:

Rudi P. Fronk, Chair and C.E.O.

Tel: (416) 367-9292 • Fax: (416) 367-2711

Email: [email protected]