Tudor abandons KSM tunnel appeal against Seabridge Gold (NYSE: SA)

Rhea-AI Filing Summary

Seabridge Gold Inc. reports that Tudor Gold Corp. has formally abandoned its appeal in the Supreme Court of British Columbia of the Chief Gold Commissioner’s decision concerning jurisdiction over an application related to the KSM Project’s Mitchell Treaty Tunnels (MTT).

The Commissioner’s May 28, 2025 decision had declined jurisdiction over Tudor’s attempt to challenge Seabridge’s KSM MTT Conditional Mineral Reserve (CMR). The CMR obligates current holders of mineral claims traversed by the tunnels not to obstruct, endanger, or interfere with their construction, operation, or maintenance.

The MTT are described as critical infrastructure for the KSM Project, consisting of two parallel tunnels, with about 12.5 kilometers crossing Tudor-owned mineral claims. Seabridge notes prior confirmations from BC Ministry of Mines representatives regarding the legal effect of the CMR and reiterates that MTT-related authorizations do not grant it any interest in Tudor’s mineral rights.

Insights

Mining sector and project-permitting analyst

Abandoned appeal reduces legal uncertainty around key KSM tunnel infrastructure.

The notice that Tudor Gold has abandoned its appeal leaves in place the Chief Gold Commissioner’s decision declining jurisdiction over Tudor’s application targeting the KSM Mitchell Treaty Tunnels Conditional Mineral Reserve. This removes an active legal challenge focused on a core piece of KSM infrastructure.

The MTT are described as critical to KSM, with two parallel tunnels, about 12.5 kilometers running through Tudor’s mineral claims. The CMR requires current claim holders not to obstruct or interfere with construction, operation, or maintenance, and Seabridge cites repeated confirmations of its legal effect by BC Ministry of Mines representatives.

With the appeal no longer proceeding, attention can remain on advancing KSM within existing authorizations. Future company disclosures on permitting steps, construction planning, and any additional agreements with neighboring claim holders will help clarify how this infrastructure progresses under the established CMR framework.

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

FORM 6-K

REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER
THE SECURITIES EXCHANGE ACT OF 1934

For the month of March 2026

Commission File Number 1-32135

SEABRIDGE GOLD INC.
(Name of Registrant)

106 Front Street East, Suite 400, Toronto, Ontario, Canada M5A 1E1
(Address of Principal Executive Office)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F.

Form 20-F [   ]          Form 40-F [X]

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

	Seabridge Gold Inc.
	(Registrant)
	By:	/s/ Chris Reynolds
	Name:	Chris Reynolds
	Title:	VP Finance and CFO
Date: March 19, 2026

EXHIBITS

Exhibit		Description
99.1		News Release dated March 19, 2026

News Release

Trading Symbols: TSX: SEA	For Immediate Release
NYSE: SA	March 19, 2026

Tudor Abandons Appeal of the BC Chief Gold Commissioner's Decision
Pertaining to Seabridge Gold's KSM's Mitchell Treaty Tunnels (MTT)

Toronto, Canada … Seabridge Gold Inc. ("Seabridge" or the "Company") (TSX:SEA) (NYSE:SA) announced today that Tudor Gold Corp. ("Tudor") has filed a Notice of Abandonment of Appeal with the Supreme Court of British Columbia, thereby abandoning its appeal of the Chief Gold Commissioner's (CGC) decision relating to her authority to hear an application challenging KSM's Mitchell Treaty Tunnels (MTT). The CGC's decision, issued on May 28, 2025, declined jurisdiction over an application brought by Tudor seeking a determination that Seabridge's KSM MTT Conditional Mineral Reserve (CMR) in respect of the MTT should not apply to Tudor or, in the alternative, that the KSM MTT CMR be cancelled. By abandoning the appeal, Tudor has accepted the CGC's decision regarding her jurisdiction.  Seabridge reported the initiation of the appeal on July 14, 2025.

The CMR requires the current holders of the mineral claims through which the MTT pass not to obstruct, endanger, or interfere with the construction, operation, or maintenance of the MTT. The legal effect of the CMR has been confirmed by representatives of the BC Ministry of Mines on multiple occasions going back over 11 years. The MTT are a critical infrastructure component of the KSM Project, consisting of two parallel tunnels connecting the east and west sides of the mine site. Approximately 12.5 kilometers of the MTT will pass through mineral claims owned by Tudor.

Seabridge Chair and CEO Rudi Fronk stated: "We applaud Tudor's decision to abandon its appeal, which lacked any merit from the outset. This action reinforces our position that the authorizations issued in favour of the MTT do not give Seabridge any interest in Tudor's mineral rights."

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.

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:  info@seabridgegold.com

106 Front Street East, Suite 400, Toronto, ON M5A 1E1, Canada
416-367-9292   www.seabridgegold.com

FAQ

What legal development did Seabridge Gold (SA) announce regarding the KSM Mitchell Treaty Tunnels?

Seabridge Gold announced that Tudor Gold filed a Notice of Abandonment of Appeal, ending its challenge to a jurisdictional decision by the BC Chief Gold Commissioner regarding KSM’s Mitchell Treaty Tunnels. This leaves the Commissioner’s May 28, 2025 decision in place without further appeal proceedings.

What is the Conditional Mineral Reserve (CMR) affecting Seabridge Gold’s KSM Mitchell Treaty Tunnels?

The Conditional Mineral Reserve requires current holders of mineral claims crossed by the Mitchell Treaty Tunnels not to obstruct, endanger, or interfere with the tunnels’ construction, operation, or maintenance. Seabridge reports that BC Ministry of Mines representatives have confirmed the CMR’s legal effect on multiple occasions over more than 11 years.

How are Tudor Gold’s mineral claims involved in Seabridge Gold’s KSM Mitchell Treaty Tunnels?

The Mitchell Treaty Tunnels are described as critical KSM infrastructure consisting of two parallel tunnels connecting the mine site’s east and west sides. Approximately 12.5 kilometers of these tunnels are planned to pass through mineral claims owned by Tudor Gold, which are subject to the CMR obligations.

What did the BC Chief Gold Commissioner decide in relation to Seabridge Gold’s KSM CMR?

On May 28, 2025, the Chief Gold Commissioner declined jurisdiction over Tudor Gold’s application challenging Seabridge’s KSM Mitchell Treaty Tunnels Conditional Mineral Reserve. That application had sought either a declaration that the CMR should not apply to Tudor or, alternatively, cancellation of the CMR itself.

How does Seabridge Gold describe the impact of Tudor’s appeal abandonment on mineral rights?

Seabridge states that Tudor’s decision to abandon the appeal reinforces its position that authorizations issued in favour of the Mitchell Treaty Tunnels do not grant Seabridge any interest in Tudor’s mineral rights. The company emphasizes that the CMR governs conduct affecting tunnel construction and operation, not ownership of Tudor’s claims.

What are Seabridge Gold’s main North American gold projects mentioned in this update?

Seabridge Gold highlights that its principal assets are the KSM and Iskut projects in British Columbia’s Golden Triangle. Additional projects include Courageous Lake in Canada’s Northwest Territories, Snowstorm in Nevada’s Getchell Gold Belt, and the 3 Aces project located in the Yukon territory.

Filing Exhibits & Attachments

1 document

Press Releases

• EX-99.1 EXHIBIT 99.1 5.7 KB